An exhaust mechanism for isostatic pressing and a method of using the same

Abstract

The present invention discloses an exhaust mechanism for isostatic pressing, comprising a rubber sleeve, a first rubber plug, and a second rubber plug. Powder material is provided in the rubber sleeve, the first rubber plug is provided on the top of the powder material, a first steel hoop is provided on the outer wall of the rubber sleeve to cooperate with the side of the first rubber plug, a second rubber plug is provided above the first rubber plug, and a second steel hoop is provided on the outer wall of the rubber sleeve to cooperate with the side of the second rubber plug; a second hole is provided on the second rubber plug to cooperate with the vacuum pump pipe, and a first hole is provided on the first rubber plug to cooperate with the second hole. The exhaust mechanism for isostatic pressing of the present invention is simple in structure, practical in function, low in cost, and high in exhaust efficiency. It effectively solves the problem that air in the gaps of powder material is sealed in the material after isostatic pressing, thereby affecting the overall density of the material, and further affecting subsequent processing as well as physical and electrical properties.

Description

Technical Field

[0001] The present invention relates to the technical field of exhaust in an isostatic pressing process, and in particular to an exhaust mechanism used in an isostatic pressing process of a silver-based electrical contact material. Background Art

[0002] The silver-based electrical contact materials used in the low-voltage electrical appliance industry are generally isostatically pressed during the material forming stage. For isostatically pressed materials, since they are in powder form before forming, the powder needs to be placed in a rubber sleeve and then placed in an isostatic pressing cylinder to complete the high-pressure ingot forming. The traditional powder isostatic pressing process controls the density of the powder during the filling stage by manually or mechanically vibrating the powder during the filling process. Due to the differences in the properties and state of the powder, the non-uniformity of the powder accumulation during the non-continuous filling process will result in a large number of gap distributions. The existence of gaps also causes the air in them to be sealed in the formed material during the pressing stage, thereby affecting the overall density of the material, and then affecting the subsequent processing and physical and electrical properties of the material.

[0003] Therefore, how to develop an exhaust mechanism for isostatic pressing has become an urgent problem to be solved by technicians in this field. Summary of the Invention

[0004] The purpose of the present invention is to provide an exhaust mechanism for isostatic pressing to solve the problem that the air in the gaps of powder materials is sealed in the material after isostatic pressing, thereby affecting the overall density of the material and further affecting the subsequent processing and physical and electrical properties.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides an exhaust mechanism for isostatic pressing, comprising a rubber sleeve, a first rubber plug and a second rubber plug. Powder material is arranged in the rubber sleeve, the first rubber plug is arranged on the top of the powder material, a first steel hoop is arranged on the outer wall of the rubber sleeve to cooperate with the side of the first rubber plug, a second rubber plug is arranged above the first rubber plug, and a second steel hoop is arranged on the outer wall of the rubber sleeve to cooperate with the side of the second rubber plug; the second rubber plug is provided with a second hole to cooperate with a vacuum pump pipeline, and the first rubber plug is provided with a first hole to cooperate with the second hole.

[0007] Furthermore, an adjusting ball is provided between the first rubber plug and the second rubber plug.

[0008] Furthermore, a spacer is provided between the top of the powder material and the lower surface of the first rubber plug.

[0009] Furthermore, the pad is provided with a third hole that matches the first hole.

[0010] Furthermore, the diameters of the first hole, the second hole and the third hole are the same.

[0011] Furthermore, one end of the vacuum pump pipeline is connected to the second hole on the second rubber plug, and the other end of the vacuum pump pipeline is connected to the vacuum pump.

[0012] Furthermore, both the upper surface and the lower surface of the first rubber plug are provided with air guide grooves that cooperate with the first hole.

[0013] Furthermore, the lower surface of the second rubber plug is provided with an air guide groove that matches the second hole.

[0014] Furthermore, both the upper surface and the lower surface of the pad are provided with air guide grooves that cooperate with the third hole.

[0015] A method for exhausting an exhaust mechanism for isostatic pressing, characterized by comprising the following steps:

[0016] S1. Select a suitable rubber sleeve and put the powder material into the rubber sleeve;

[0017] S2. Placing a spacer with a third hole on top of the powder material, wherein the number of the spacers is determined according to the height of the powder material;

[0018] S3. Place the first rubber plug on the top of the spacer, put the adjustment ball into the designated position, and insert the first steel hoop on the outer wall of the rubber sleeve. Do not tighten the first steel hoop yet.

[0019] S4. Place a second rubber plug on top of the first rubber plug, insert a second steel hoop onto the outer wall of the rubber sleeve, and tighten the second steel hoop until it is sealed;

[0020] S5. Connect the second hole of the second rubber stopper to the vacuum pump pipe, start the vacuum pump, and exhaust according to the process settings;

[0021] S6. After the exhaust is completed, first lock the first steel hoop, then turn off the vacuum pump, and finally take out the second rubber plug and the adjusting ball to complete the entire exhaust process.

[0022] Compared with the prior art, the beneficial technical effects of the present invention are as follows: the exhaust mechanism used for isostatic pressing of the present invention is provided with a two-stage sealing device of a first rubber plug and a second rubber plug, which not only ensures that the gas in the powder material can be discharged smoothly during vacuuming, but also prevents the gas from flowing back after vacuuming, thereby ensuring the quality of the finished product after isostatic pressing; the exhaust mechanism used for isostatic pressing of the present invention achieves a gradual close fit between the rubber sleeve and the powder material during the exhaust process through the plastic deformation of the rubber sleeve during the negative pressure process without changing the rubber material of the rubber sleeve, which is more conducive to adjusting the gap in the powder material for exhaust. In general, the exhaust mechanism used for isostatic pressing of the present invention is simple in structure, practical in function, low in cost, and high in exhaust efficiency, and effectively solves the problem that the air in the gap of the powder material is sealed in the material after isostatic pressing, thereby affecting the overall density of the material, and further affecting the subsequent processing as well as the physical and electrical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] Figure 1 Schematic diagram of the exhaust mechanism structure for isostatic pressing of the present invention;

[0025] Figure 2 It is a top view of the first rubber plug, the second rubber plug and the spacer.

[0026] Explanation of the accompanying drawings: 1. rubber sleeve; 2. first rubber plug; 3. second rubber plug; 4. first steel hoop; 5. second steel hoop; 6. pad; 7. vacuum pump pipe; 8. first hole; 9. second hole; 10. third hole; 11. adjusting ball; 12. powder material; 13. air guide groove. DETAILED DESCRIPTION

[0027] To make the technical problems, technical solutions, and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "multiple" means two or more, unless otherwise specifically defined. "Several" means one or more, unless otherwise specifically defined. In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0028] like Figure 1 and Figure 2 As shown, a venting mechanism for isostatic pressing includes a rubber sleeve 1, a first rubber plug 2, a second rubber plug 3, a spacer 6, a first steel hoop 4 and a second steel hoop 5.

[0029] The rubber sleeve 1 is made of rubber. A powder material 12 is provided inside the rubber sleeve 1. A first rubber plug 2 is provided on the top of the powder material 12. A first steel hoop 4 is provided on the outer wall of the rubber sleeve 1 to cooperate with the side of the first rubber plug 2. A second rubber plug 3 is provided above the first rubber plug 2. An adjustment ball 11 is provided between the upper surface of the first rubber plug 2 and the lower surface of the second rubber plug 3. The adjustment ball 11 contacts the inner wall of the rubber sleeve 1. The function of the adjustment ball 11 is to create a certain gap between the first rubber plug 2 and the rubber sleeve 1, so that gas can enter the various gas guide grooves and holes, which is conducive to the discharge of gas.

[0030] A second steel hoop 5 is provided on the outer wall of the rubber sleeve 1 and matches the side surface of the second rubber plug 3 .

[0031] The second rubber plug 3 is provided with a second hole 9 that cooperates with the vacuum pump pipe 7 , and the first rubber plug 2 is provided with a first hole 8 that cooperates with the second hole 9 .

[0032] A spacer block 6 is provided between the top of the powder material 12 and the lower surface of the first rubber plug 2 , and the number of the spacer blocks 6 is determined according to the height of the powder material 12 in the rubber sleeve 1 .

[0033] The cushion block 6 is provided with a third hole 10 that matches the first hole 8 .

[0034] The diameters of the first hole 8 , the second hole 9 and the third hole 10 are the same, and the air guide grooves 13 are aligned vertically to ensure smooth exhaust.

[0035] One end of the vacuum pump pipe 7 is connected to the second hole 9 on the second rubber plug 3 , and the other end of the vacuum pump pipe 7 is connected to a vacuum pump.

[0036] The first rubber plug 2 has air guide grooves 13 on its upper and lower surfaces that mate with the first holes 8. The second rubber plug 3 has air guide grooves 13 on its lower surface that mate with the second holes 9. The spacer 6 has air guide grooves 13 on its upper and lower surfaces that mate with the third holes 10. These air guide grooves 13 assist in exhaust, further improving exhaust smoothness.

[0037] The use process of the present invention is as follows:

[0038] S1, select a suitable rubber sleeve 1, and put the powder material 12 into the rubber sleeve 1;

[0039] S2. Place a spacer 6 with a third hole 10 on top of the powder material 12. The number of the spacers 6 is determined by the height of the powder material 12.

[0040] S3. Place the first rubber plug 2 on the top of the cushion block 6, put the adjusting ball 11 into the designated position, and insert the first steel hoop 4 on the outer wall of the rubber sleeve 1. The first steel hoop 4 is not locked yet.

[0041] S4. Place the second rubber plug 3 on top of the first rubber plug 2, insert the second steel hoop 5 on the outer wall of the rubber sleeve 1, and tighten the second steel hoop 5 until it is sealed;

[0042] S5, connecting the second hole 9 of the second rubber stopper 3 to the vacuum pump pipe 7, starting the vacuum pump, and exhausting according to the process settings;

[0043] S6. After the exhaust is completed, first lock the first steel hoop 4, then turn off the vacuum pump, and finally take out the second rubber plug 3 and the regulating ball 11 to complete the entire exhaust process.

[0044] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. An exhaust mechanism for isostatic pressing, characterized in that: The invention comprises a rubber sleeve (1), a first rubber plug (2) and a second rubber plug (3), wherein a powder material (12) is arranged in the rubber sleeve (1), a first rubber plug (2) is arranged on the top of the powder material (12), a first steel hoop (4) is arranged on the outer wall of the rubber sleeve (1) to match the side of the first rubber plug (2), a second rubber plug (3) is arranged above the first rubber plug (2), a second steel hoop (5) is arranged on the outer wall of the rubber sleeve (1) to match the side of the second rubber plug (3); a second hole (9) is opened on the second rubber plug (3) to match the vacuum pump pipe (7), and the second rubber plug (7) is provided with a second hole (9) to match the vacuum pump pipe (7). The first rubber plug (2) is provided with a first hole (8) cooperating with the second hole (9); an adjusting ball (11) is provided between the first rubber plug (2) and the second rubber plug (3); one end of the vacuum pump pipe (7) is connected to the second hole (9) on the second rubber plug (3), and the other end of the vacuum pump pipe (7) is connected to the vacuum pump; the upper surface and the lower surface of the first rubber plug (2) are both provided with an air guide groove (13) cooperating with the first hole (8); the lower surface of the second rubber plug (3) is both provided with an air guide groove (13) cooperating with the second hole (9).

2. The exhaust mechanism for isostatic pressing according to claim 1, characterized in that: A spacer (6) is provided between the top end of the powder material (12) and the lower surface of the first rubber plug (2).

3. The exhaust mechanism for isostatic pressing according to claim 2, characterized in that: The cushion block (6) is provided with a third hole (10) that matches the first hole (8).

4. The exhaust mechanism for isostatic pressing according to claim 3, characterized in that: The first hole (8), the second hole (9) and the third hole (10) have the same diameter.

5. The exhaust mechanism for isostatic pressing according to claim 3, characterized in that: The upper surface and the lower surface of the cushion block (6) are both provided with an air guide groove (13) that cooperates with the third hole (10).

6. A method for exhausting an exhaust mechanism for isostatic pressing according to any one of claims 1 to 5, characterized in that The following steps are included: S1. Select a suitable rubber sleeve (1) and put the powder material (12) into the rubber sleeve (1); S2, placing a spacer (6) with a third hole (10) on the top of the powder material (12), wherein the number of the spacers (6) is determined according to the height of the powder material (12); S3. Place the first rubber plug (2) on the top of the cushion block (6), put the adjusting ball (11) into the designated position, and insert the first steel hoop (4) on the outer wall of the rubber sleeve (1). The first steel hoop (4) is not locked temporarily; S4. Place the second rubber plug (3) on the top of the first rubber plug (2), insert the second steel hoop (5) on the outer wall of the rubber sleeve (1), and tighten the second steel hoop (5) until it is sealed; S5, connecting the second hole (9) of the second rubber plug (3) to the vacuum pump pipe (7), starting the vacuum pump, and exhausting according to the process settings; S6. After the exhaust is completed, first lock the first steel hoop (4), then turn off the vacuum pump, and finally remove the second rubber plug (3) and the regulating ball (11) to complete the entire exhaust process.

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