Air hot pressing furnace

Abstract

The utility model discloses an air hot-pressing furnace, which comprises a furnace body, a heating and temperature control system, a pressure control system and a water cooling system, the furnace body is of a vertical cuboid structure and is divided into two parts, one third of the furnace body is a furnace door with a side opening door, two thirds of the furnace body is a fixed furnace body, and a furnace frame is fixedly arranged in the furnace body and is formed by welding a plurality of 45 steel blocks. Supports of the upper pressure head and the lower pressure head are fixed on the furnace frame, heating elements are silicon molybdenum rods which are uniformly and fixedly distributed around a hearth, the temperature control system consists of a temperature controller, a thermocouple and a silicon controlled rectifier, the thermocouple converts a 4-20mA electric signal output by a temperature control instrument into a temperature signal and feeds back the temperature signal to the silicon controlled rectifier, and the silicon controlled rectifier is connected with the temperature controller. According to the pressure control system, an upper pressing head of the hot pressing furnace is fixed, a lower pressing head is conveyed through a servo cylinder, a mold is placed on the lower pressing head, the lower pressing head ascends to jack up the mold, pressure can be generated after the lower pressing head makes contact with the upper pressing head, and the upper pressing head and the lower pressing head are both water-cooling pressing heads. Material taking is convenient, and hot pressing can be carried out in the air environment.

Description

Technical Field

[0001] The utility model relates to the technical field of hot pressing furnaces, in particular to an air hot pressing furnace. Background Art

[0002] The hot pressing furnace is mainly composed of the furnace body, furnace door, heating and heat preservation and temperature measurement system, water cooling system, control system, hydraulic system, etc. The hot pressing furnace is a cyclic operation type, which is widely used in hot pressing and sintering of cemented carbide, functional ceramics, powder metallurgy, etc. under high temperature and high vacuum conditions. It can also be hot pressed and sintered under gas protection. At present, all hot pressing furnaces on the market need to work under vacuum or inert gas protection, and hot pressing furnaces working in air environment are still blank. Utility Model Content

[0003] The purpose of this application is to provide an air hot pressing furnace to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions: an air hot pressing furnace, comprising a furnace body, a heating and temperature control system, a pressure control system and a water cooling system, wherein the furnace body is a vertical rectangular parallelepiped structure, made of 304 stainless steel, and the furnace body is divided into two parts, one third of which is a furnace door with a side opening, and two thirds of which are a fixed furnace body, and a furnace frame is fixedly installed in the furnace body, and the furnace frame is welded by multiple pieces of 45 steel, and the supports of the upper pressure head and the lower pressure head are fixed on the furnace frame;

[0005] Heating and temperature control system: The heating element is a silicon-molybdenum rod, which is evenly fixed around the furnace. The temperature control system consists of a temperature controller, a thermocouple, and a thyristor. The thermocouple converts the 4-20mA electrical signal output by the temperature control instrument into a temperature signal and feeds it back to the thyristor.

[0006] Pressure control system: adopts electric input mode, the motor is equipped with a reducer to drive the lead screw for displacement, the pressure adjustment can be switched between manual and automatic, and can be adjusted manually. The instrument can set the automatic pressure adjustment, and can achieve pressure stabilization, pressure maintenance, and program control pressure. The upper pressure head of the hot press furnace is fixed, and the lower pressure head is transmitted by a servo cylinder. The mold used in the hot press furnace is made of corundum. The mold is placed on the lower pressure head. The lower pressure head rises to lift the mold, and pressure will be generated after contacting the upper pressure head;

[0007] Water cooling system: Both the upper and lower pressure heads are water-cooled pressure heads, and water flows through the center of the water-cooled pressure heads.

[0008] Preferably, a heat-insulating material is fixed to the inner wall of the furnace body, and the heat-insulating material is lightweight alumina.

[0009] Preferably, a weighing sensor is also provided in the furnace body, which is fixed at the output end of the servo cylinder and is used to weigh the bearing capacity of the lower pressure head.

[0010] In summary, the technical effects and advantages of the utility model are:

[0011] The utility model is provided with a heating and temperature control system, a pressure control system and a water cooling system, can perform hot pressing work in an air environment, and is provided with a side-opening door structure, so that materials can be taken out conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a schematic diagram of the structure of the air hot pressing furnace in the embodiment of the present application.

[0014] In the figure: 1. furnace door; 2. silicon aluminum rod; 3. upper pressure head; 4. insulation material; 5. lower pressure head; 6. thermocouple; 7. weighing sensor; 8. servo cylinder. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0017] It should also be noted that the standard parts used in this application document can be purchased from the market, and can be customized according to the description in the specification and drawings. Unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to the specific circumstances, and in the absence of clear limitations, machines, parts and equipment can all adopt conventional models in the prior art.

[0018] In this article, the term "comprising" is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0019] Example: Reference Figure 1 The air hot pressing furnace shown includes a furnace body, a heating and temperature control system, a pressure control system and a water cooling system. The furnace body is a vertical rectangular parallelepiped structure made of 304 stainless steel. The furnace body is divided into two parts, one third of which is a furnace door 1 with a side opening door, and two thirds of which are a fixed furnace body. The advantage of the side opening door structure is that it is convenient to take and put materials. A furnace frame is fixedly installed in the furnace body. The furnace frame is welded from multiple pieces of 45 steel, and the supports of the upper pressure head and the lower pressure head are fixed on the furnace frame;

[0020] Heating and temperature control system: The heating element is silicon-molybdenum rod 2, which is evenly and fixedly distributed around the furnace. The temperature control system consists of a temperature controller, a thermocouple 6, and a thyristor. The thermocouple converts the 4-20mA electrical signal output by the temperature control instrument into a temperature signal, which is fed back to the thyristor to control the current and achieve temperature control.

[0021] Pressure control system: adopts electric input mode, the motor is equipped with a reducer to drive the lead screw to move, the pressure adjustment can be switched between manual and automatic, and can be adjusted manually, the instrument can set the automatic pressure adjustment, and can achieve pressure stabilization, pressure maintenance, and program control pressure. The upper pressure head of the hot press furnace is fixed, which is conducive to pressing out materials with regular shapes. The lower pressure head is transmitted by a servo cylinder 8. The mold used in the hot press furnace is made of corundum. The mold is placed on the lower pressure head 5. The lower pressure head 5 rises to lift the mold, and pressure will be generated after contacting the upper pressure head 3;

[0022] Water cooling system: Both the upper and lower pressure heads are water-cooled pressure heads. Water flows through the center of the water-cooled pressure head to promptly take away the heat conducted from the hot zone to prevent the water-cooled pressure head from overheating.

[0023] By means of the above structure: the inner wall of the furnace body is fixed with a heat-insulating material 4, and the heat-insulating material 4 is a light alumina.

[0024] By means of the above structure: a weighing sensor 7 is also provided in the furnace body, which is fixed at the output end of the servo cylinder and is used to weigh the bearing capacity of the lower pressure head.

[0025] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Air hot pressing furnace, characterized in that: It comprises a furnace body, a heating and temperature control system, a pressure control system and a water cooling system. The furnace body is a vertical rectangular parallelepiped structure made of 304 stainless steel. The furnace body is divided into two parts, one third of which is a furnace door (1) with a side opening, and two thirds of which are a fixed furnace body. A furnace frame is fixedly installed in the furnace body. The furnace frame is welded from multiple pieces of 45 steel. The supports of the upper pressure head and the lower pressure head are fixed on the furnace frame. Heating and temperature control system: The heating element is a silicon-molybdenum rod (2), which is evenly and fixedly distributed around the furnace. The temperature control system consists of a temperature controller, a thermocouple (6), and a thyristor. The thermocouple converts the 4-20mA electrical signal output by the temperature control instrument into a temperature signal and feeds it back to the thyristor. Pressure control system: adopts electric input mode, the motor is equipped with a reducer to drive the lead screw to move, the pressure adjustment can be switched between manual and automatic, and can be adjusted manually, the instrument can be set to automatically adjust the pressure, and can achieve pressure stabilization, pressure maintenance, and program control of pressure. The upper pressure head of the hot press furnace is fixed, and the lower pressure head is transmitted by a servo cylinder (8). The mold used in the hot press furnace is made of corundum. The mold is placed on the lower pressure head (5). The lower pressure head (5) rises to lift the mold, and pressure is generated after contacting the upper pressure head (3); Water cooling system: Both the upper and lower pressure heads are water-cooled pressure heads, and water flows through the center of the water-cooled pressure heads.

2. The air hot pressing furnace according to claim 1, characterized in that: A heat-insulating material (4) is fixed to the inner wall of the furnace body, and the heat-insulating material (4) is light aluminum oxide.

3. The air hot pressing furnace according to claim 1, characterized in that: The furnace body is also provided with a weighing sensor (7), which is fixed at the output end of the servo cylinder and is used to weigh the bearing capacity of the lower pressure head.

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