Powder injection molding vacuum sintering jig

Abstract

The utility model discloses a vacuum sintering jig for powder injection molding, and belongs to the technical field of vacuum sintering jigs. A vacuum sintering jig for powder injection molding comprises a furnace body and further comprises an outer cavity and a heating cavity which are formed in the furnace body, and a cooling cavity is formed between the outer cavity and the heating cavity. An air pipe is communicated above the cooling cavity; the air pipe is connected with an air blower; the outer cavity communicates with a water return pipe which is provided with a first water pump. A water tank is fixed below the air blower, a cooling box is arranged in the water tank, and cooling fins are arranged in the cooling box; the circulating refrigerating system composed of the cooling liquid, the water tank, the cooling fins and the cooling box is combined with air flow in the cooling cavity driven by blast air, the cooling effect of the cooling cavity on the heating cavity is improved, and the cooling time is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum sintering jigs, in particular to a powder injection molding vacuum sintering jig. Background Art

[0002] The main purpose of the powder injection molding vacuum sintering fixture is to sinter the product after thermal debinding into a MIM product with final shape and performance under vacuum and argon protection conditions. Through reasonable design and manufacturing, the efficiency and product quality of the powder injection molding vacuum sintering process can be greatly improved.

[0003] The working process of the sintering furnace can be roughly divided into three stages: vacuuming, heating and sintering, and cooling. During the cooling stage, due to the high temperature inside the sintering furnace, it often takes a long time of natural waiting to take out the sintered product, which greatly affects the efficiency of the entire process. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a powder injection molding vacuum sintering fixture that can overcome the above problems or at least partially solve the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A powder injection molding vacuum sintering fixture comprises a furnace body, and also includes: an outer cavity and a heating cavity are arranged inside the furnace body, a cooling cavity is formed between the outer cavity and the heating cavity; an air duct is connected above the cooling cavity; the air duct is connected to a blower; the outer cavity is connected to a water return pipe, a first water pump is arranged on the water return pipe; a water tank is fixed below the blower, a cooling box is arranged inside the water tank, and cooling fins are arranged inside the cooling box.

[0007] Preferably, a cooling column is connected to the inner wall of the outer cavity.

[0008] Preferably, a second water pump is provided above the water tank, the second water pump is connected with a water supply pipe and a water extraction pipe, and the water supply pipe is connected to the cooling chamber.

[0009] Preferably, the water tank is provided with a water inlet and a water outlet.

[0010] Preferably, a sewage trough is provided at the bottom of the outer cavity, and a sewage outlet is provided on the sewage trough.

[0011] Furthermore, limiting rods are provided on both sides of the sewage trough, and cleaning pull blocks are sleeved on the limiting rods.

[0012] Furthermore, a pull rod is fixed on the cleaning pull block.

[0013] Preferably, a plurality of pillars are fixed below the furnace body.

[0014] Compared with the prior art, the utility model provides a powder injection molding vacuum sintering fixture, which has the following beneficial effects:

[0015] 1. The powder injection molding vacuum sintering fixture can quickly remove the heat in the cooling cavity through a circulating refrigeration system composed of coolant, water tank, cooling fins and cooling box, combined with the air flow in the cooling cavity driven by blast, thereby improving the cooling effect of the fast cooling cavity on the heating cavity.

[0016] 2. The powder injection molding vacuum sintering fixture uses the second water pump to send the water in the water tank into the cooling chamber and the heating chamber for cleaning, and then discharges the waste water through the drain port. The remaining residue remains in the drain tank. The residue is cleaned and discharged to the drain port by pulling the cleaning pull, thereby achieving the purpose of cleaning the inside of the furnace and avoiding damage to the equipment caused by residue accumulation.

[0017] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model can improve the cooling effect of the fast cooling cavity on the heating cavity and clean the residue in the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a powder injection molding vacuum sintering fixture proposed by the utility model;

[0019] Figure 2 A top view of a powder injection molding vacuum sintering jig proposed by the utility model;

[0020] Figure 3 This is a rear view of a powder injection molding vacuum sintering jig proposed by the utility model;

[0021] Figure 4 A cross-sectional view of a water tank section of a powder injection molding vacuum sintering fixture proposed by the utility model;

[0022] Figure 5 This is a cross-sectional view of a furnace body of a powder injection molding vacuum sintering fixture proposed by the utility model;

[0023] Figure 6 A powder injection molding vacuum sintering fixture proposed by the utility model Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0024] In the figure: 1. furnace body; 11. door body; 12. support; 13. operation box; 14. outer cavity; 15. cooling column; 16. heating cavity; 17. cooling cavity; 2. water tank; 21. water outlet; 22. water inlet; 23. cooling box; 24. cooling fins; 25. blower; 26. air duct; 3. return pipe; 31. first water pump; 4. second water pump; 41. water supply pipe; 42. water extraction pipe; 5. cleaning pull block; 51. limit rod; 52. pull rod; 6. sewage outlet; 7. sewage trough. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] Embodiment 1:

[0028] Reference Figure 1-Figure 6 A powder injection molding vacuum sintering fixture includes a furnace body 1, and also includes: an outer cavity 14 and a heating cavity 16 are arranged inside the furnace body 1, and a cooling cavity 17 is formed between the outer cavity 14 and the heating cavity 16; an air duct 26 is connected above the cooling cavity 17; the air duct 26 is connected to a blower 25; the outer cavity 14 is connected to a return water pipe 3, and a first water pump 31 is arranged on the return water pipe 3; a water tank 2 is fixed below the blower 25, a cooling box 23 is arranged in the water tank 2, and cooling fins 24 are arranged in the cooling box 23.

[0029] In the utility model, the return pipe 3 and the outer cavity 14 form a complete loop, so that the internal coolant can flow in the loop to bring out the heat in the cooling cavity 17. The cooling fins 24 cool the coolant in the return pipe 3 while also cooling the surrounding water through the cooling box 23, avoiding the waste of energy caused by the scattering of excess cold air.

[0030] When it is necessary to cool the heating chamber 16, the user needs to fill the water tank 2 with water in advance to cool the coolant inside the return pipe 3. The first water pump 31 starts to control the flow of coolant in the return pipe 3. At the same time, the blower 25 starts to increase the air flow rate inside the cooling chamber 17, thereby improving the heat conduction efficiency in the cooling chamber 17. After absorbing heat, the coolant goes through the return pipe 3 below into the water tank 2 and passes through the cooling box 23. Under the double action of cold water and cooling fins 24, the temperature of the coolant is reduced, and driven by the first water pump 31, the cooled coolant is transported back to the outer chamber 14, thereby achieving the cooling effect.

[0031] Embodiment 2:

[0032] Reference Figure 1-Figure 6 , which is basically the same as Example 1, and further, a plurality of cooling columns 15 are connected to the inner wall of the outer cavity 14, a second water pump 4 is provided above the water tank 2, the second water pump 4 is connected to a water supply pipe 41 and a water suction pipe 42, the water supply pipe 41 is connected to the cooling cavity 17, a water inlet 22 and a water outlet 21 are provided on the water tank 2, a sewage trough 7 is provided at the bottom of the outer cavity 14, a sewage outlet 6 is provided on the sewage trough 7, limiting rods 51 are provided on both sides of the sewage trough 7, a cleaning block 5 is sleeved on the limiting rod 51, a pull rod 52 is fixed on the cleaning block 5, a plurality of pillars 12 are fixed below the furnace body 1, the furnace body 1 is connected to the operation box 13 through the line pipeline above, and a heat insulation layer is provided on the door body 11.

[0033] In the present invention, the space inside the cooling column 15 is connected to the outer cavity 14, so that the coolant flows inside the outer cavity 14 to have a cooling effect. The cooling column 15 greatly increases the contact area with the air inside the cooling cavity 17, thereby improving the efficiency of the coolant absorbing the heat inside the cavity.

[0034] When all the processes are completed, the second water pump 4 can be started to extract water from the water tank 2 and inject it into the space inside the furnace body 1 for soaking. Solenoid valve ports are respectively provided above and below the heating chamber 16, so that during the water injection and drainage process, water can enter the heating chamber 16 or be discharged from the heating chamber 16 through the solenoid valve port. After soaking for a period of time, the waste water can be discharged by opening the drain port 6 below, and some residues will remain in the drain trough 7. The user can pull the pull rod 52 to drive the cleaning pull block 5 to move, and bring the residue to the drain port 6 for discharge, thereby completing the cleaning of the furnace body 1.

[0035] The door body 11 is provided with a heat insulating layer, so as to ensure that when the door body 11 is closed, the interior of the heating chamber 16 becomes an independent chamber and does not emit excessive heat to the outside.

[0036] When in use, the user adds a sufficient amount of water into the water tank 2 through the water inlet 22 in advance, and then starts the blower 25 and the first water pump 31, thereby increasing the air flow rate inside the cooling chamber 17 and allowing the coolant to circulate in the cooling circuit to bring out the heat in the chamber. After the heat in the coolant is converted out through the cooling box 23 and the water tank 2, it is circulated back into the cooling chamber 17, and this process is repeated to achieve the effect of cooling the inside of the furnace body 1.

[0037] When the user needs to clean the furnace body 1, the second water pump 4 can be started to pump water into the furnace body 1. After soaking for a period of time, the wastewater with residues can be discharged by opening the drain outlet 6. The remaining residues will be carried to the recessed drain trough 7 by the wastewater. Then the user can pull the pull rod 52 to drive the cleaning pull block 5 to clean the residue to the drain outlet 6 for discharge.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A powder injection molding vacuum sintering jig, comprising a furnace body (1), characterized in that: Also includes: An outer cavity (14) and a heating cavity (16) are provided inside the furnace body (1), and a cooling cavity (17) is formed between the outer cavity (14) and the heating cavity (16); The cooling chamber (17) is connected to an air duct (26) above; the air duct (26) is connected to a blower (25); The outer cavity (14) is connected to a water return pipe (3), and a first water pump (31) is provided on the water return pipe (3); A water box (2) is fixed below the blower (25), a cooling box (23) is provided inside the water box (2), and cooling fins (24) are provided inside the cooling box (23).

2. A powder injection molding vacuum sintering jig according to claim 1, characterized in that: The inner wall of the outer cavity (14) is connected to a plurality of cooling columns (15).

3. A powder injection molding vacuum sintering jig according to claim 1, characterized in that: A second water pump (4) is provided above the water tank (2); the second water pump (4) is connected to a water supply pipe (41) and a water extraction pipe (42); the water supply pipe (41) is connected to the cooling chamber (17).

4. The powder injection molding vacuum sintering jig according to claim 1, characterized in that: The water tank (2) is provided with a water inlet (22) and a water outlet (21).

5. The powder injection molding vacuum sintering jig according to claim 1, characterized in that: A sewage trough (7) is provided at the bottom of the outer cavity (14), and a sewage outlet (6) is provided on the sewage trough (7).

6. A powder injection molding vacuum sintering jig according to claim 5, characterized in that: Limit rods (51) are provided on both sides of the sewage trough (7), and cleaning pull blocks (5) are sleeved on the limit rods (51).

7. The powder injection molding vacuum sintering jig according to claim 6, characterized in that: A pull rod (52) is fixed on the cleaning pull block (5).

8. The powder injection molding vacuum sintering jig according to claim 1, characterized in that: A plurality of pillars (12) are fixed below the furnace body (1).

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