Pebble broken, sand making machine

The necessary building materials in the construction project is the sand and stone aggregate, and the quality of gravel aggregate has some influence on the quality of the project. The sand that the general construction USES is the channel sand natural sand.Tools industry Bottom Carrier Electric Furnace

However, with the increase of domestic and foreign projects, the continuous exploitation of the river channel has been reduced, and the sand and stone aggregate needed for the foundation construction cannot be satisfied. Therefore, artificial sand is increasing in the proportion of construction projects. Due to the broken pebble without blasting, can clean up the river, to prevent blocking of the channel, therefore, sand pebbles system has economic benefits and environmental benefits, are considered appropriate for artificial sand processing of the main raw material.Vacuum sintering furnace

With the continuous development of domestic economy, need big production of crusher are required in pebbles, introduce advanced wear-resisting large stone crusher, cobble sand making machine, the pebble mill, etc. The professional for all kinds of hard rock broken, such as pebbles, pebble, granite, granite, quartz, limestone, and other hard material of broken, widely used in sand making plant, concentrator, Shi Liaochang, such as coal, mill in the domestic each big project.High Quality Promotional Induction Melting Furnace

The structure and advantages of ore mill are presented

The ore grinding mill consists of fine grinding machine, micro-grinding mill, grinding mill, grinding machine, etc. In order to let more users understand the ore grinding machine equipment comprehensively.

1. Structure composition of ore mill
Compared with the traditional milling equipment, the mine stone mill powder machine structure is relatively complex, mainly composed of frame, transmission parts, eccentric sleeve, bowl shape bracket, crushing cone, bearing, lubrication, adjustment, insurance package cylinder hydraulic department, electronic department of the ten most common, which support sleeve, adjust the cylinder cover, insurance and electric control part is the main research object of intelligent control, due to main shaft and rack for interference fit, so part of the spindle as frame, the eccentric sleeve, bowl bracket, broken cone and spindle constitutes the main working parts of broken.Energy saving split vertical tube furnace made in China

Ii. Advantages and characteristics of ore mill

1, finished product grain shape well -- ore mill intergranular laminated principle design through the use of special crushing cavity and the matching speed, to replace the traditional single grain crushing principle, realize the selective crushing of material significantly increase the content of product material proportion and cube, largely reduces the needle flake material.

2, crushing strength, in the design of ore mill adopts fixed spindle, small spherical shaft and the optimization of the structure, make the rated power of the hydraulic cone crusher and through capacity is greatly increased, improved the production at the same time, also makes the production efficiency has a great improvement.
Factory Direct Industrial Vacuum Sintering Furnace

3, high wear resistance, all parts are made of high manganese steel such as broken wall, the rolling mortar wall, together with the change of the crushing cavity type and laminating crushing material layer protection, greatly reduce abrasion ore mill, general service life compared to the old milling machinery increased by 35% - 82%.

4, long service life, the unique thin oil lubrication system design, greatly improving the service life of the ore milling machine, high performance non-contact labyrinth seal no wear at the same time, also improve the reliability of the blocking dust.
Tools industry factory vacuum furnace

Maintenance of sand production line

The most important thing for users of sand production line is the life span of the equipment, and the maintenance work of the equipment should be done in order to ensure the service life of the sand production line. So how do we maintain the sand production line?vacuum furnaces
First of all, we should to do a good job of lubrication line regularly, after when using the equipment for a period of time, must adopt suitable lubricant to make every parts of machinery lubrication tasks, in order to effectively reduce the friction between parts. The sand production line can always be in a good running state without any other problems.vacuum furnace
Second, users in the selection of equipment lubricating oil has to do, analyzing the specific issues in the winter, the user needs to choose low viscosity lubricating oil, while in the summer when need to choose the viscosity of the lubricants. Otherwise, it is difficult to achieve the optimal lubrication effect, thus causing unnecessary trouble to people's life.
Third, we must be ready before using sand making production line equipment comprehensive inspection work, in front of the boot, need to equipment operation condition and oil has a good understanding, in order to let the system of sand production line can play a very good performance.
Fourth, when the problem appeared in the process of sand production line is running, you must be cool, don't too nervous, want to stop the machine immediately to check, after solving the problem of good fault can restart, can't let equipment to work with.Vacuum Furnace Brazing Services

Shredding of plastics and PVC materials is the best choice

Shredder can be used to tear and recycle PVC materials of various thickness. PVC material is used in a very wide range of plastics, and his recycling is very promising.
Shred vendors would give everyone to share the current situation of PVC recycling market, PVC is one of the most widely used plastics in the world, are widely used in the construction industry, packaging materials, household products and automotive industry. Power Protection System Small Metal Furnace For Copper

Although there has been a lot of debate about whether to ban PVC in the past decade or so, the production of PVC is still growing. Now, the discussion of PVC impact on the environment problem more and more objective, especially due to the increasingly depletion of oil resources, PVC even more attractive, because compared with PE, PVC composite materials only half from oil, the other half from the rich ore. However, the problem of PVC recycling and its potential impact on the environment have not been solved. On many occasions, the limited use of PVC still exists.Cyclical vacuum in uction melting furnace for rare metal 


Therefore, the application development and recycling of PVC must be taken seriously. The current situation of PVC recycling, the possibility of recycling is generally, plastic can be recycled, PVC is no exception, and it is being recycled.
Shredding machine all PVC materials can be recycled, our manufacturer have a video you can consult online customer service demand, you can also to our factory for actual, our factory has all kinds of PVC material, the thickness of the commissioning for your site, we use the facts to convince you.High temperature custom benchtop muffle furnace

Plastic crusher has brought great benefits to customers

  Main material is polyethylene plastic bottles of waste, plastic is close to our life, we can see traces of plastic in any place, the use of the modern plastic is far beyond the metal and wood use, consumption and far beyond the other materials. Because of polyethylene under natural conditions are difficult to oxidation, and the combustion will produce a lot of gas that is harmful to the body and material, so the environmental pollution is very serious, the famous white pollution is caused by the plastic. vacuum furnaces

  Black tea and green tea, etc are very high quality made of polyethylene plastic, it has a very high recycling value, if discarded directly not only has a lot of pollution to the environment, the data is also a kind of very unnecessary waste. For black tea bottles, green tea bottles, and so on, we can take some measures to make these materials more usable.operate latest promotion annealing sintering furnace

Plastic shredding machine can be torn for a variety of materials processing, black tea, green tea can be by shredding machine processing, such as the bottled again the use of resources, the same a bottle of black tea, if direct discard worthless, if be used to recycle again, can get very good collection, and the environmental protection also play a very important role. It is the value of these reusable garbage that can be used again by shredding machine.High vacuum gas atmosphere sintering muffle Furnace

Vacuum furnace operation method

Vacuum furnace operation method

A, preparation,
First turn on the cold water machine, vacuum furnace may alarm because of the water pressure is too low.
Second, turn the power switch
Before electricity, be sure to carefully check the status of each switch:
1, the heating way should be put in "manual", counterclockwise to the end for power regulation can be;
2, pressure lowered a stop "toggle switch, if there is any check its in stop position, pressurized potentiometer have the knob to the minimum.
After the above checks are no errors. To open the main power switch. Then open the power switch.
Third, furnace into the sample
Normally the stove when not in use are under vacuum condition, so before use to check the stove is under vacuum, first using the inlet valve of furnace gas has been slowly to the atmospheric pressure, and then turn on the furnace cover with a jack and removed the lid and put in the sample that need to burn. If you don't need to pressure sintering, then be sure to remember to cover the inside and outside the two layers of insulation cover, otherwise, the temperature may rise will not come up. If want to undertake heating sintering, then must make the most out of insulation cover in the middle of the small cover off to start testing. Note: when put the sample must not touch the heating element, prevent short circuit occur furnace shell and the heating element.
Vacuum furnace features:
1 low processing temperature, vacuum furnace, the workpiece is not easy to deformation.
2, vacuum furnace can process carbon steel, cast iron, steel, low alloy steel, stainless steel and other materials.
3, vacuum furnace, can improve the strength, corrosion resistance and abrasion resistance.

There are several kinds of vacuum furnace heating way, what is commonly used?

There are several kinds of vacuum furnace heating way, what is commonly used?

Vacuum furnace is commonly used in design of high temperature thermal energy saving all metal stainless steel as a frame structure, because of the relative to the other metal heat preservation effect not only first-class stainless steel and heat insulation constant temperature is quite unique, and quick in work quickly, using insulation resistance to high temperature alloy furnace heating is very fast. So there are several kinds of vacuum furnace heating mode? Vacuum furnace heating mode according to different purposes of actually has a lot of kinds, but a way of heating "heat", is a commonly used vacuum furnace heating mode.
Vacuum furnace in the bottom of the chamber of a stove or furnace set very convenient temperature resistant plate equipment and artifacts in the heating process is not affected by temperature difference and deformation and even caused the explosion, when welding the bottom of the furnace and furnace body USES is seamless welding method, can effectively form a super vacuum mode, and when the enterprise in the production of vacuum furnace valve USES the German advanced compression techniques, reasonable to use the oven door gravity to close the valve, and using the lever principle to open the valve. On the switch link to ensure the safe and does not appear because of the heat bilges cold shrink, extrusion deformation caused by various unpredictable accidents, enterprise set up the reasonable protection valve spring buffer device.

Concrete analysis of the effect of heat treatment

Concrete analysis of the effect of heat treatment

Alleged metal heat treatment, it is with the aid of certain thermal effect (sometimes by mechanical action, chemistry or other principals) to the change of the human internal organization and structure, metal alloy to obtain the required performance of process operations. In all kinds of metal materials and products of the production process, heat treatment is one of the indispensable important segment.
Casting is usually needed to eliminate internal stress of low temperature annealing, or completely annealing or normalizing; Some still need after quenching tempering (aging). Heat treatment of steel in the whole production process, including heat treatment of steel ingot, pressure processing and finished products in the process of heat treatment. Heat treatment of steel ingot is mainly of annealing at different temperatures. Heat treatment of steel can be used in accordance with the process performance and performance requirements. Such as all kinds of steel should be normalized processing, often in order to obtain fine and uniform microstructure and good mechanical properties. High strength quenched and tempered steel shell}! High temperature quenching tempering treatment, often to ensure that meet the requirements of the comprehensive mechanical properties. Stainless steel plate and steel belt, most solid solution treatment to improve its corrosion resistance. Hot forging (rolling) steel according to the requirements of the user to determine the heat treatment process of the products. Cold drawing (rolling) steel billet heat treatment, heat treatment and finished goods between heat treated.
Non-ferrous metal and its alloy semi-finished products or products of the production with steel and steel parts production phase 'roughly, but in the non-ferrous metal processing technology in the process, heat treatment is an important part of the more. No congratulations on heat treatment. Plate and strip production would not be performed.

Vacuum furnace operation process

Vacuum furnace operation process

Vacuum furnace to pay attention to matters a lot in the process of operation, the following introduce the basic operation process of vacuum furnace for everybody:
1, first check the power of the vacuum furnace, water.
2, it is forbidden to smoke in hearth, open flame.
3, familiar with vacuum furnace every action buttons, understand its action.
4, open the system power and heating power, began to preheat diffusion pump.
5, pay attention to the programming temperature control table.
6, open the oven door began to feed.
7 when ventilation to switch off the pressure reducing valve, vacuum furnace, before the new cylinder change tighten, to open the valve, the air, finally tighten the valve.
8 the runtime, vacuum furnace, to leave a man guards.
9, regularly check the vacuum furnace gas supply system, circulatory system.
10 runtime unless some special cases, vacuum furnace, otherwise don't modify the vacuum furnace to run the program parameters.
11, the normal operation of vacuum furnace, it is forbidden to switch "automatic" and "manual" button.
12 and servicing of the vacuum furnace, absolutely coat pocket coat pocket.
13, at the end of the vacuum furnace heating, remove cooling lights flashing alarm, into a state vacuum furnace cooling.

Vacuum furnace air pressure quenching

Vacuum furnace air pressure quenching

Vacuum heat treatment is a kind of the increasing popularity of heat treatment technology, widely used in aerospace, automotive and machine tool industry. This paper focuses on the development of the vacuum furnace pressure quenching system, the system guarantee to obtain good metallurgical performance in the process of hardening workpiece and has the least deformation.
For the heat treatment, in the process of vacuum hardening of many of the issues has become the primary problem of distortion of work piece. For manufacturers of vacuum furnace, its purpose is to provide can obtain satisfactory metallurgical properties while maintaining stable equipment size. The cause of the deformation of workpiece deformation may occur in any heat treatment process, the possible reasons is the rapid heating caused by the thermal gradient within the workpiece forming serious thermal stress and led to the workpiece's deformation.
It is necessary to estimate workpiece deformation, there are two reasons for this. First of all, the most by the vacuum heat treatment of workpiece in service with other parts in the assembly, excessive deformation may inhibit the interaction required. Second, then correct deformation process is expensive, and may have harmful effects on the metallurgical properties of workpiece. 3. More fluid concept Strictly speaking, a degree of deformation is impossible to avoid. But several methods available to minimize deformation, in order to obtain the minimum deformation, developed the first flow gas quenching system. The system and hydraulic parts of heating and quenching cycle has a very good control.

The primary principle of vacuum brazing furnace

The primary principle of vacuum brazing furnace

Vacuum brazing furnace is in a vacuum environment to maintenance of sintering furnace heated objects, the heating method is more, such as resistance heating, induction heating, microwave heating, etc. Vacuum induction furnace is the use of induction heating to maintenance of sintering furnace heated objects can be divided into the power frequency, medium frequency, high-frequency, such as type, can be attributable to a subclass of vacuum brazing furnace.
Vacuum induction furnace Vacuum induction furnace is in a vacuum or maintain atmosphere conditions, using the principle of intermediate frequency induction heating make carbide cutter head, and all kinds of metal powder limit sintered body implementation of complete sets of equipment, is for hard alloy, metal dysprosium, and planning in the industrial production of ceramic materials.
A hydrogen sintering furnace, vacuum induction tungsten first principle and use vacuum induction furnace tungsten is after vacuum filling hydrogen maintenance conditions, using the principle of intermediate frequency induction heating, the high temperature of tungsten crucible in the winding, after thermal conduction to the work, suitable for scientific research, military units for hard metal such as tungsten, molybdenum and its alloy powder sintering molding. Second, primary layout and layout method for vertical, the discharging method. Its primary group became: electric furnace body, vacuum system, water cooling system, pneumatic system, hydraulic system and front-rear institutions, base, workbench, induction heating equipment (tungsten heater and high-grade thermal insulation material), into the electric equipment, intermediate frequency power supply and electrical control system, etc. Third, primary function After vacuum filling the hydrogen gas maintenance and control atmosphere in furnace pressure and sintering conditions.

The characteristics of vacuum brazing furnace is not the same

The characteristics of vacuum brazing furnace is not the same

(1) and electrothermal vacuum brazing furnace for annealing, quenching and tempering heat treatment.
(2) as a result of radiant tube burner, compared with electrothermal, two-thirds fuel costs can be cut.
(3) CO2 emissions compared with electrothermal can be reduced by 40%.
(4) regenerative radiant tube burner improved and radiant tube flange of water so as to realize the large radiant tube flange vacuum seal.

The function of vacuum brazing furnace

The function of vacuum brazing furnace

The function of vacuum brazing furnace, vacuum brazing furnace quenching, tempering, annealing) is through the material or parts in the condition of vacuum brazing furnace according to the technical process of heating, cooling, to achieve the expected performance a processing method. Vacuum brazing furnace brazing in the condition of vacuum brazing furnace, heating up a set of components to the filler metal melting point temperature above, but below the substrate metal melting point temperature, with the aid of filler metal to wet and flow of metal in the matrix form of weld a welding process. (brazing temperature in different material varies) vacuum brazing furnace sintering in the condition of vacuum brazing furnace, heat the metal powder products, make the adjacent metal powder grain by adhesion and diffusion effect and a method of burn into parts. Vacuum brazing furnace plus magnetic is mainly suitable for metal materials and magnetic treatment.

Vacuum furnace of common sense

Vacuum furnace of common sense

1, vacuum high-pressure gas quenching furnace, high speed steel, stainless steel, die steel, good hardenability materials, the characteristics of the vacuum heat treatment deformation small, after the heat treatment of parts of parts does not need to clean. Defects cost high, will not be repaid quenching gases. High pressure gas quenching vacuum furnace from the structure can be divided into two horizontal and vertical. Level can be divided into single room, double room and the chamber of commerce. Vertical circular cylinder and the application of long rod parts heat treatment. Vacuum high-pressure gas quenching furnace quenching pressure is usually 2 b AR 10 b A R. Can choose according to the needs of users type furnace parts is applicable to pressure.
2, vacuum furnace can be divided into single rooms, double rooms and vertical generally used nickel-chromium alloy heating temperature is 800, NE. Vacuum tempering furnace general requirements after tempering parts surface light, no oxidation color.
3, vacuum furnace, can be divided into the single room, double room and vertical. Vacuum furnace based on component selection of materials under high temperature and low temperature, high temperature, 800 ℃ ~ 1350 ℃, the temperature is 800 ℃).

Troubleshooting method of vacuum furnace

Troubleshooting method of vacuum furnace

Vacuum furnace in daily use shall timely maintenance and maintenance, if vacuum furnace product quality is not very good or not timely maintenance may appear a little problem, the following to introduce some troubleshooting methods of the vacuum furnace.
Vacuum furnace of troubleshooting
The experiment of low temperature if can not meet the standard to look at the same temperature to reduce speed. If is temperature drop slowly you will need to check whether work under indoor without drying process. Studio in testing prior to drying processing and placed too much experiment, so that make the air cycle cannot cause; If this is not the need to check the cooling system of the equipment, refrigeration equipment need professional personnel to check.
High temperature experiment when the temperature was not up to standard, need to check the electrical system, use the method to determine failure problems. Temperature increase at a slower speed if you need to see if the regulating plate in the circulatory system in closed effect cycle, or check whether the fan system normal operation. Once if the temperature is too high, can make the machine trigger over temperature protection, need to check the problems is to control the instrument, there is a problem can be directly replaced.

A common use of vacuum furnace

A common use of vacuum furnace

A common use of vacuum heat treatment furnace steel alloy. Many applications involving heat treatment of steel, makes it tough, through a service of quenching and tempering. Sclerosis involving heat the steel to a predetermined temperature, and then rapidly cooling.
The application of vacuum furnace brazing ideal choice. Brazing is a kind of heat treatment process, the other is used to connect two or more base metal parts, through the filler metal melting thin layer in the space between them.
Further applications of vacuum furnace, vacuum carburizing, also known as the low pressure carburizing or LPC. In the process of gas (such as acetylene) was introduced to the temperature of the hot spots, usually in the partial pressure of 1600 f and 1950 f. Broken into its constituent elements (in this case, the carbon and hydrogen) gas. Carbon atoms, and then spread to the surface of the part of the area. Often repeat, the function of the input of the gas and the duration of the diffusion time. Work once the correct "shell", usually adopt oil or high pressure gas (HPGQ) normally, nitrogen or helium faster quenching induction quenching. This process is also known as case hardening.

The three outstanding advantages, high temperature vacuum furnace

The three outstanding advantages, high temperature vacuum furnace

High temperature vacuum furnace can reach to the flows, is a kind of vacuum heating equipment, today the mysteries of the high temperature vacuum furnace for everyone. High temperature vacuum furnace in the furnace chamber within a particular space using the vacuum system, by the vacuum pump, vacuum measuring device and vacuum valve components such as carefully, substances out of furnace cavity part, making furnace chamber pressure is less than a standard atmospheric pressure, so as to realize a vacuum furnace cavity space, that is the vacuum furnace. In close vacuum state through the electric heating element heating furnace, the experimental furnace. In the metal casing or quartz glass sealing furnace used in pipeline connection with high vacuum pump systems. Vacuum chamber of a stove or furnace can be up to 133 x (2 ~ 10-10-4) Pa. Furnace heating system can be directly or silicon molybdenum rods with silicon carbide electric heating, high frequency induction heating is also available. Is mainly used for ceramic sintering, vacuum smelting and electric vacuum parts in addition to gas, annealing, brazing of the metal, and ceramic, metal seal etc.
1, can eliminate heat in the process of oxidation and decarburization on the surface of the workpiece, clean surface without metamorphic layer can be obtained. That only when grinding mill side of the cutting tool, such as twist drill grinding after make the groove on the surface of the decarburization layer directly exposed to the blade, the cutting performance of improved relations.
2, on the environment pollution-free, "three wastes" treatment is not required.
3, obviously improve the temperature measurement, the monitoring precision. Indicated value of thermocouple temperature and furnace temperature reached plus or minus 1.5 ° c. But in different parts of a large number of artifacts in the furnace temperature difference is bigger, if USES the rarefied gas forced circulation, can still be controlled within + / - 5 ° c temperature difference.
High degree of high temperature vacuum furnace electromechanical integration. Increase in the temperature measurement and control accuracy, on the basis of the workpiece moving, pressure adjustment, power adjustment, etc all can set programming in advance, according to the steps to implement the quenching and tempering. Energy consumption significantly below the salt bath furnace. Modern advanced vacuum furnace heating chamber is made of high quality insulation material of insulation walls and barriers, electric energy can be highly focused on indoor heating, energy saving effect is remarkable.

Simple understanding of vacuum brazing furnace

Simple understanding of vacuum brazing furnace

Everyone's understanding of vacuum brazing furnace how many? In order to make people more about the product master, we'll give you a brief introduction of below!
Vacuum brazing furnace is the large-scale equipment, heat treatment can be vacuum brazing, vacuum annealing, vacuum aging and other processing. Programmable multiple different procedures, it can control and into hundreds of heat treatment curve points, six points up, down, left and right sides, front and rear area temperature control, there are more and single point temperature recorder and over temperature protection device, furnace temperature uniformity can be controlled in less than 3 ℃, the other with the installation of high purity nitrogen high flow of strong cold. The equipment has a large amount of furnace charging and high efficiency, have special request for complex parts and parts no need for supplementary processing products.

Vacuum brazing furnace high precision temperature control system

Vacuum brazing furnace high precision temperature control system

Introduces the vacuum brazing furnace high precision temperature control system of the composition, working principle and using computer to realize automatic high precision temperature control algorithm. Practice shows that in different power vacuum heating equipment, using the control algorithm can achieve satisfactory control effect.
Along with the computer technology, the rapid development of modern control theory and industrial computer process control system has been widely used, in a lot of control engineering, have been obtained accurate control laws and methods, and can make the controlled object to get the desired response. At present, in the aspect of industrial kiln temperature automatic control, by using microcomputer to realize the direct digital control system to replace the analog PID control has been obviously, this not only improves the performance of the control system and control precision, but also enhance the control of the system. With the function. Vacuum brazing technology get more and more widely used in various industrial fields. Especially in the aerospace industry, some parts of brazing for heating speed and precision of temperature control are put forward higher requirements. In order to meet these parts brazing process, we developed to grind a sword the new brazing equipment, using microcomputer to realize high degree of automatic temperature control, can be in accordance with the requirements of different brazing technology automatically complete the whole process of soldering process. Differential signal processing such as PID control algorithm, so that the controlled volume stability in value. Temperature control system consists of two parts, the main circuit and control circuit, the principle of electrical control system structure is shown in figure 1. Figure 1 control system structure diagram, system composition and principle of using computer to realize automatic temperature control, must first put the furnace temperature of measured signal accurately in the form of digital t into the computer control system, and then compared with setting temperature to form both the deviation of the signal, the computer according to the partial main circuit including the ac power and magnetic voltage regulator, silicon controlled rectifier voltage regulator device.

The development of the multi-purpose high temperature vacuum furnace

The development of the multi-purpose high temperature vacuum furnace

According to thermal ion fuel element manufacturing process and equipment requirements, combined with high temperature and vacuum brazing furnace and vacuum annealing furnace structure, developed by the multi-purpose tantalum high-temperature vacuum furnace, it can be used to vacuum annealing, high temperature degassing, high temperature vacuum brazing process for many purposes, etc. Main technical parameters of no.1 is: the limit temperature of 2000 ℃; Ultimate vacuum 7 x 10-5 pa; Vacuum hot work about 10-4 pa; Effective heating zones Ч sizes ф 80 mm 80 mm; Mean temperature zone temperature deviation plus or minus 5.6 ℃ or less and more than 1600 ℃ measurement; Manual and automatic temperature control temperature control mode, can free conversion; Automatic temperature control error of 0.3% or less; The vacuum system for oil free vacuum system; Take time to time to 7 x 10-4 pa, 20 min or less; 20 kw power rating.
Has a high working temperature and vacuum degree, time quick, no oil vapor pollution, thermal inertia small, uniform temperature, temperature control accurate, convenient operation, safe and reliable characteristics. This furnace is designed for single room, vertical, loading, internal heating, resistance heating, vacuum furnace, tantalum heating element, metal screen heat insulation structure. This type of vacuum furnace thermal inertia small, high working temperature, but more complex structure and control, manufacturing installation accuracy requirement is high, difficult to debug. The whole equipment mainly includes vacuum furnace shell, heating element and the metal heat shield, vacuum system and electric control system and so on several parts.