Hot pressing sintering machine facilitating mold fixing

Abstract

The utility model discloses a hot pressing sintering machine convenient for die fixation, which relates to the technical field of sintering machines and comprises a heating furnace, a furnace door is rotatably arranged at one end of the heating furnace through a pin shaft, and an inner cavity is fixedly arranged in the heating furnace. The sliding rail, the sliding seat, the mold support and the mold cavity are arranged, the sliding rail is arranged in the inner cavity of the heating furnace, the mold support can slide in the heating furnace through the sliding seat and the sliding rail, and when the product mold seat carries out feeding and discharging, the mold support can slide to the outer side of the heating furnace so as to provide a larger feeding and discharging space; a plurality of clamping seats with L-shaped structures are arranged in the die cavity, and the plurality of clamping seats can respectively clamp and fix the die holder, so that the stability of the die holder mounted in the die cavity is ensured, and meanwhile, the stability of the die holder in the process of sliding into the heating furnace along with the die bracket is ensured; the situation that the quality of a formed product is affected due to the fact that raw material powder in the die holder is unstable in the placing process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sintering machines, in particular to a hot pressing sintering machine which is convenient for fixing a mold. Background Art

[0002] Hot pressing sintering refers to a sintering method in which dry powder is filled into a mold and then heated while applying pressure in a uniaxial direction, completing both forming and sintering simultaneously. Common hot pressing sintering machines mainly consist of a heating furnace, a pressurizing device, a mold, and temperature and pressure measuring devices. The heating furnace uses electricity as the heat source, and the heating elements include SiC, MoSi, or nickel-chromium wire, platinum wire, molybdenum wire, etc. The pressurizing device requires a slow speed, constant pressure, and flexible pressure adjustment. There are lever-type and hydraulic types. Depending on the requirements of the material properties, the pressure atmosphere can be air, a reducing atmosphere, or an inert atmosphere. The mold must be high-strength, high-temperature resistant, and anti-oxidant, and must not bond to the hot-pressed material. The mold's thermal expansion coefficient should be consistent or similar to that of the hot-pressed material. Depending on the sintering characteristics of the product, hot alloy steel, graphite, silicon carbide, aluminum oxide, zirconium oxide, metal ceramics, etc. can be selected. The most widely used is graphite mold.

[0003] The hot pressing and sintering machines in the prior art have some problems in practical applications. In order to ensure production, the existing hot pressing and sintering machines generally can place multiple sets of molds inside. After the multiple sets of molds are placed inside the hot pressing and sintering machine, the bottom of the mold needs to be supported, and the support structure will cause uneven heating of the bottom of the mold, which is easy to affect the molding quality of the product inside the mold. In addition, the existing hot pressing and sintering machines are not convenient for taking and placing the mold, and cannot guarantee the stability of the mold during the taking and placing process. Especially before the product is sintered and formed, the raw material powder inside the mold is easily affected by instability during the mold placement process, which affects the quality of the product after molding.

[0004] Therefore, it is necessary to invent a hot pressing sintering machine that is convenient for fixing the mold to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a hot pressing sintering machine which is convenient for fixing the mold, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hot pressing sintering machine that is convenient for fixing the mold, comprising a heating furnace, a furnace door rotatably provided at one end of the heating furnace by a pin shaft, an inner cavity fixedly provided inside the heating furnace, two slide rails fixedly provided at the inner bottom end of the inner cavity, a slide seat slidably provided above the two slide rails, a mold bracket is commonly provided at the top ends of the two slide seats, a plurality of mold cavities are penetrated through the upper surface of the mold bracket, a mold seat is inserted above the plurality of mold cavities, grooves are provided on the inner walls of both sides of the plurality of mold cavities, a clamping seat is rotatably provided inside the plurality of grooves by a pin shaft, and the clamping seat is provided in an "L"-shaped structure, a clamping plate is rotatably provided at the top end of the clamping seat by a pin shaft, and a supporting plate is rotatably provided at the bottom end of the clamping seat by a pin shaft;

[0007] The bottom end of the clamp seat is rotatably provided with a movable rod through a pin shaft, the middle part of the movable rod is rotatably provided with a movable sleeve through a bearing, the middle part of the movable sleeve is rotatably provided with a transmission arm through a pin shaft, the bottom end of the transmission arm is rotatably provided with a transmission sleeve through a pin shaft, two transmission rods are slidably provided below the mold bracket, and multiple transmission sleeves are rotatably provided in the middle parts of the two transmission rods through bearings.

[0008] Preferably, a plurality of fixing sleeves are sleeved on the outer side of the transmission rod, and the plurality of fixing sleeves are fixedly arranged below the mold bracket.

[0009] Preferably, a pressure seat is fixedly provided on one end of the transmission rod.

[0010] Preferably, a plurality of vacuum tubes are fixedly provided on the outer wall of the heating furnace, and an electric heating wire is fixedly provided on the inner wall of the inner cavity.

[0011] Preferably, a plurality of legs are fixedly provided at the bottom end of the outer side wall of the heating furnace, and pulleys are provided at the bottom ends of the plurality of legs, and a track adapted to the pulleys is provided below the heating furnace.

[0012] Preferably, the mold cavity is configured as a through structure, and a gap is provided between the mold cavity and the mold base.

[0013] The technical effects and advantages of this utility model are:

[0014] 1. The utility model provides a slide rail, a slide seat, a mold support and a mold cavity. The slide rail is provided inside the inner cavity of the heating furnace. The mold support can slide inside the heating furnace through the slide seat and the slide rail. When the product mold base is loading and unloading, the mold support can slide to the outside of the heating furnace to provide a larger loading and unloading space. By providing multiple "L"-shaped clamping seats inside the mold cavity, the multiple clamping seats can respectively clamp and fix the mold base to ensure the stability of the mold base installed in the mold cavity. At the same time, the stability of the mold base during the process of sliding into the heating furnace following the mold support is ensured, so as to avoid the raw material powder inside the mold base being easily unstable during the placement process and affecting the quality of the product after molding;

[0015] 2. The utility model is provided with a transmission rod, a transmission sleeve, a transmission arm, a movable sleeve and a movable rod. After the mold bracket completely enters the heating furnace, the transmission rod is squeezed by the inner wall of the heating furnace and slides horizontally, and the transmission rod drives the clamping seat to rotate through the movable sleeve, the transmission arm, the transmission sleeve and the transmission rod, so that the support plate at the bottom end of the clamping seat is pushed upward. The support plate can push the mold base upward, so that the bottom end of the mold base is separated from the mold bracket, thereby avoiding uneven heating of the mold base during the sintering process of the product, affecting the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the internal structure of the overall structure of the utility model.

[0018] Figure 3 This is a schematic diagram of the mold bracket and mold base structure of the utility model.

[0019] Figure 4 This is a schematic diagram of the mold bracket structure of the present utility model.

[0020] Figure 5 This is a schematic diagram of the movable rod structure of the utility model.

[0021] Figure 6 This is a schematic diagram of the clamping seat structure of the present utility model.

[0022] In the figure: 1. Heating furnace; 2. Furnace door; 3. Inner cavity; 4. Slide rail; 5. Slide seat; 6. Mold bracket; 7. Mold cavity; 8. Mold base; 9. Groove; 10. Clamp seat; 11. Clamp plate; 12. Support plate; 13. Movable rod; 14. Movable sleeve; 15. Transmission arm; 16. Transmission sleeve; 17. Transmission rod; 18. Fixed sleeve; 19. Press seat; 20. Vacuum tube; 21. Support leg; 22. Track. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1:

[0025] The utility model provides Figure 1-6 The hot pressing sintering machine shown is convenient for fixing the mold, comprising a heating furnace 1, one end of the heating furnace 1 is rotatably provided with a furnace door 2 through a pin shaft, an inner cavity 3 is fixedly provided inside the heating furnace 1, two slide rails 4 are fixedly provided at the bottom end of the inner cavity 3, a slide seat 5 is slidably provided above the two slide rails 4, and a mold bracket 6 is commonly provided at the top of the two slide seats 5, a plurality of mold cavities 7 are penetrated through the upper surface of the mold bracket 6, a mold base 8 is inserted above the plurality of mold cavities 7, grooves 9 are provided on the inner walls of both sides of the plurality of mold cavities 7, a clamping seat 10 is rotatably provided inside the plurality of grooves 9 through a pin shaft, and the clamping seat 10 is set as an "L"-shaped structure, a clamping plate 11 is rotatably provided at the top of the clamping seat 10 through a pin shaft, and a supporting plate 12 is rotatably provided at the bottom end of the clamping seat 10 through a pin shaft, the supporting plate 12 is used to lift the mold base 8, and the clamping plate 11 is used to clamp the mold base 8 from the side;

[0026] The bottom end of the clamping seat 10 is rotatably provided with a movable rod 13 through a pin shaft, the middle part of the movable rod 13 is rotatably provided with a movable sleeve 14 through a bearing, the middle part of the movable sleeve 14 is rotatably provided with a transmission arm 15 through a pin shaft, and the bottom end of the transmission arm 15 is rotatably provided with a transmission sleeve 16 through a pin shaft. Two transmission rods 17 are slidably provided below the mold bracket 6, and multiple transmission sleeves 16 are rotatably provided at the middle parts of the two transmission rods 17 through bearings. It should be noted that, considering that the transmission sleeve 16 and the movable sleeve 14 not only need to rotate but also need to realize the transmission function, a limit sleeve can be provided on the outside of the movable rod 13 and the transmission rod 17 to limit the transmission sleeve 16 and the movable sleeve 14 from sliding along the transmission rod 17 and the movable rod 13;

[0027] The outer side of the transmission rod 17 is sleeved with multiple fixing sleeves 18, and the multiple fixing sleeves 18 are fixedly arranged below the mold support 6. One end of the transmission rod 17 is fixedly provided with a pressure seat 19, which is used to press against the inner wall of the inner cavity 3 to drive the transmission rod 17 to move;

[0028] A plurality of vacuum tubes 20 are fixedly provided on the outer wall of the heating furnace 1, and a heating wire is fixedly provided on the inner wall of the inner cavity 3. A plurality of legs 21 are fixedly provided on the bottom end of the outer wall of the heating furnace 1, and the bottom ends of the plurality of legs 21 are provided with pulleys. A track 22 adapted to the pulleys is provided below the heating furnace 1. The pulleys cooperate with the track 22 to facilitate the movement of the main body of the equipment. It should be noted that if the equipment does not need to be moved, the track 22 and the pulleys can be removed.

[0029] The mold cavity 7 is set as a through structure, and a gap is provided between the mold cavity 7 and the mold base 8. The design of the gap ensures that the mold base 8 can be placed in the mold cavity 7.

[0030] Working principle of this utility model:

[0031] When the device is in use, the raw materials of the product can be placed in the mold base 8, the mold base 8 can be placed in the mold cavity 7, and placed in the inner cavity 3 of the heating furnace 1 through the mold bracket 6 for sintering and molding of the product. When loading the product, the furnace door 2 is flipped open, and the mold bracket 6 is pulled outward using a hook or other tool. The mold bracket 6 slides horizontally to the outside of the inner cavity 3 under the guidance of the slide 5 and the slide rail 4. At this time, the mold base 8 can be placed in the interior of the mold cavity 7. During this process, the mold base 8 squeezes the support plate 12 downward, so that the support plate 12 drives the clamping base 10 to rotate until the bottom end of the clamping base 10 is tightly fitted with the notch of the groove 9. At this time, the support plate 12 can support the mold base 8, and the clamping plate 11 can fit with the outer side of the mold base 8, so that the mold base 8 is stably installed in the interior of the mold cavity 7. At this time, the mold bracket 6 can be pushed into the inner cavity 3. After the mold bracket 6 completely enters the inner cavity 3, the transmission rod The pressing seat 19 at one end of 17 is squeezed by the inner wall of the inner cavity 3, so that the transmission rod 17 slides horizontally, and the transmission rod 17 can drive the transmission sleeve 16 to slide horizontally. During the horizontal sliding of the transmission sleeve 16, the bottom end of the transmission arm 15 is driven to move. During the sliding process, the transmission arm 15 drives the movable sleeve 14 and the movable rod 13 to move through its top end, so that the movable rod 13 drives the clamping seat 10 to rotate and causes the support plate 12 to move obliquely upward. During this process, the transmission sleeve 16 and the movable sleeve 14 rotate separately to ensure that the movement process is carried out smoothly. The support plate 12 moves obliquely upward to push the mold base 8 upward, so that the mold base 8 is separated from the mold support 6. At this time, the electric heating wire inside the inner cavity 3 is controlled to be energized to form a high-temperature environment inside the inner cavity 3 of the heating furnace 1, and the vacuum tube 20 is connected to the air compressor to form a high-temperature vacuum environment required for product molding in the inner cavity 3, and the product is molded under the influence of the environment;

[0032] After the product is formed, the furnace door 2 is opened, and then the mold support 6 is pulled outward, and the mold base 8 can be removed from the mold cavity 7 to complete the processing and molding of the product;

[0033] Example 2:

[0034] As a supplement to the previous embodiment, considering the problem that the mold support 6 may be excessively displaced and fall off after being pulled out from the inner cavity 3, both the slide rail 4 and the slide seat 5 are provided with a "C" - shaped structure. The slide rail 4 and the slide seat 5 are engaged with each other. When the slide rail 4 slides outwards following the mold support 6, the end of the slide rail 4 is engaged with the end of the slide seat 5 to ensure that the slide rail 4 will not fall off. Moreover, protruding limiting structures are respectively provided at the ends of the slide seat 5 and the slide rail 4 to prevent the slide seat 5 from being excessively displaced and falling off.

[0035] It should be noted that this technical solution is not only applicable to the hot - press sintering processing of materials such as silicon nitride and neodymium iron boron, but can also be adapted to other materials that meet the processing requirements. And in this technical solution, the heating wire is selected from one of a variety of types such as SiC, MoSi, nickel - chromium wire, platinum wire, molybdenum wire, etc. During the processing, one of a variety of gases such as vacuum can be extracted, air, reducing atmosphere or inert atmosphere can be injected into the inner cavity 3 according to requirements. The mold base 8 is selected from one of a variety of types such as hot alloy steel, graphite, silicon carbide, alumina, zirconia, metal ceramic, etc., without limitation under the condition of ensuring normal material processing.

[0036] Finally, it should be noted that the above - mentioned are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A hot pressing sintering machine that facilitates mold fixation, comprising a heating furnace (1), characterized in that: One end of the heating furnace (1) is provided with a furnace door (2) rotatable by a pin shaft, an inner cavity (3) is fixedly provided inside the heating furnace (1), two slide rails (4) are fixedly provided at the bottom end of the inner cavity (3), a slide seat (5) is slidably provided above the two slide rails (4), a mold bracket (6) is provided at the top end of the two slide seats (5), a plurality of mold cavities (7) are penetrated through the upper surface of the mold bracket (6), a mold base (8) is inserted above the plurality of mold cavities (7), grooves (9) are provided on the inner walls of both sides of the plurality of mold cavities (7), a clamping seat (10) is rotatably provided inside the plurality of grooves (9), and the clamping seat (10) is set as an "L"-shaped structure, a clamping plate (11) is rotatably provided at the top end of the clamping seat (10) by a pin shaft, and a support plate (12) is rotatably provided at the bottom end of the clamping seat (10) by a pin shaft; The bottom end of the clamping seat (10) is provided with a movable rod (13) rotatably via a pin shaft, the middle part of the movable rod (13) is provided with a movable sleeve (14) rotatably via a bearing, the middle part of the movable sleeve (14) is provided with a transmission arm (15) rotatably via a pin shaft, the bottom end of the transmission arm (15) is provided with a transmission sleeve (16) rotatably via a pin shaft, two transmission rods (17) are slidably provided below the mold bracket (6), and a plurality of transmission sleeves (16) are rotatably provided at the middle parts of the two transmission rods (17) respectively via bearings.

2. The hot pressing sintering machine for facilitating mold fixation according to claim 1, characterized in that: A plurality of fixing sleeves (18) are sleeved on the outer side of the transmission rod (17), and the plurality of fixing sleeves (18) are all fixedly arranged below the mold support (6).

3. The hot pressing sintering machine for facilitating mold fixation according to claim 2, characterized in that: A pressure seat (19) is fixedly provided at one end of the transmission rod (17).

4. The hot pressing sintering machine for facilitating mold fixation according to claim 1, characterized in that: A plurality of vacuum tubes (20) are fixedly provided on the outer wall of the heating furnace (1), and an electric heating wire is fixedly provided on the inner wall of the inner cavity (3).

5. The hot pressing sintering machine for facilitating mold fixation according to claim 1, characterized in that: A plurality of legs (21) are fixedly provided at the bottom end of the outer wall of the heating furnace (1), and pulleys are provided at the bottom ends of the plurality of legs (21). A track (22) adapted to the pulleys is provided below the heating furnace (1).

6. The hot pressing sintering machine for facilitating mold fixation according to claim 1, characterized in that: The mold cavity (7) is configured as a through structure, and a gap is provided between the mold cavity (7) and the mold base (8).

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