Isostatic cool pressing powder packaging structure

Abstract

The invention provides a cold isostatic pressing powder packaging structure which comprises a rubber sleeve, the rubber sleeve is provided with a rubber sleeve opening and a rubber plug, a frame body is arranged on the outer side of the rubber sleeve opening, a pressing plate is arranged between the inner wall of the frame body and a rubber strip opening, the pressing plate makes contact with the edge of the rubber sleeve opening, and the rubber plug is arranged on the rubber sleeve opening. An elastic assembly is arranged between the pressing plate and the inner wall of the frame body, and the elastic assembly is in a compressed state; a fixing hole is formed in the side wall of the frame body, and a bolt body penetrates through the fixing hole to make contact with the pressing plate and is used for fixing the pressing plate. According to the packaging structure, sealant is not needed, oil is prevented from entering the rubber sleeve, and pollution to materials in the rubber sleeve is avoided.

Description

Technical Field

[0001] The present invention belongs to the field of cold isostatic pressing technology and relates to a cold isostatic pressing powder encapsulation structure. Background Art

[0002] It is prepared by powder metallurgy method. Targets and products of various specifications are more and more widely used in cold isostatic pressing. During the cold isostatic pressing process, in order to prevent the liquid from entering during pressing, a sealing method needs to be adopted. The sealing method usually adopts the method of fixing with sealant + iron wire, a mechanical fixing method. For the iron wire sealing method, sealant needs to be applied between the inner part of the rubber sleeve and the plug, and then double-layer fixed with iron wire. The problems are: the disassembly and assembly of the sealant are difficult, and it is easy to contaminate the material, and there is also a problem that the liquid is easy to enter the blank. The mechanical sealing method is also easy to deform and let oil in during the pressing process.

[0003] CN209289811U discloses a cold isostatic pressing super-sealing forming device, which includes a control die. A die rubber sleeve is arranged inside the control die. A diversion hole is arranged on the die rubber sleeve. A powder isolation plate is arranged inside the die rubber sleeve. A first upper cover plate and a first lower cover plate are respectively arranged at the top and bottom of the powder isolation plate. A second upper cover plate is arranged at the top of the first upper cover plate. A second lower cover plate is arranged at the bottom of the first lower cover plate. An upper sealing plate is arranged at the bottom of the second upper cover plate. A lower sealing plate is arranged at the top of the second lower cover plate. The second upper cover plate and the upper sealing plate are connected by an upper fastening strip. The second lower cover plate and the lower sealing plate are connected by a lower fastening strip. A die cavity is formed among the first upper cover plate, the first lower cover plate and the powder isolation plate. The whole device can perform pressure forming on the die from multiple directions including up, down and side. Although the cold isostatic pressing super-sealing forming device has good sealing performance, its structure is complex and the manufacturing cost is relatively high.

[0004] CN205732969U discloses a sealing device for a cold isostatic pressing ultra-large specification slab rubber film, which includes a square outer steel die and a lower rubber film and an upper rubber film sequentially placed inside the outer steel die. Sealing protrusions are sequentially connected to the upper parts of the four sides of the upper rubber film. An inner concave arched part that is tightly matched with the sealing protrusion is arranged on the lower rubber film. The inner concave arched part and the sealing protrusion are mutually attached to achieve sealing. This sealing device will not have the phenomenon of liquid leakage caused by loose sealing at the four corners. During sealing, the upper and lower rubber films can be bonded. This sealing device still needs to use a rubber film, and oil ingress may still occur during the cold isostatic pressing process. Summary of the Invention

[0005] In order to solve the technical problems existing in the prior art, the present invention provides a cold isostatic pressing powder encapsulation structure. This encapsulation structure does not need to use sealant, prevents oil from entering the rubber sleeve, and avoids the pollution of the material inside the rubber sleeve.

[0006] To achieve the above technical effects, the present invention adopts the following technical solutions:

[0007] The present invention provides a cold isostatic pressing powder encapsulation structure. The encapsulation structure includes a rubber sleeve, the rubber sleeve is provided with a rubber sleeve opening and a rubber plug, a frame body is arranged outside the rubber sleeve opening, a pressing plate is arranged between the inner wall of the frame body and the rubber strip opening, the pressing plate is in contact with the edge of the rubber sleeve opening, and an elastic component is arranged between the pressing plate and the inner wall of the frame body, and the elastic component is in a compressed state;

[0008] The side wall of the frame body is provided with a fixing hole, and a bolt body passes through the fixing hole and contacts the pressing plate to fix the pressing plate.

[0009] In the present invention, the pressing plate and the frame body squeeze the elastic component, and the reaction force of the elastic component is applied to the pressing plate, pressing the pressing plate against the edge of the rubber sleeve opening and the rubber plug. The combination of the pressing plates corresponding to the side walls of the frame body realizes the sealing of the rubber sleeve opening. The bolt body can fix the pressing plate and the frame body, improving the sealing performance and at the same time preventing the pressing plate from generating left - right displacement. During the cold isostatic pressing process, the rubber plug and the rubber sleeve opening will continue to shrink. At this time, the elastic component can ensure the pressing state of the pressing plate against the edge of the rubber sleeve opening and the rubber plug through deformation, avoiding the problem of oil ingress during the cold isostatic pressing process.

[0010] As a preferred technical solution of the present invention, the frame body is a polygonal frame body.

[0011] Among them, the polygonal frame body can be a triangular frame body, a rectangular frame body, a pentagonal frame body or a hexagonal frame body, etc.

[0012] As a preferred technical solution of the present invention, the frame body is a rectangular frame body.

[0013] As a preferred technical solution of the present invention, the number of the pressing plates is not less than 4.

[0014] In the present invention, the number of the pressing plates generally corresponds to the number of the sides of the frame body, and the number of the pressing plates not less than 4 can ensure the sealing of the rubber sleeve opening in all directions.

[0015] As a preferred technical solution of the present invention, the length of the pressing plate is not greater than the width of the rubber sleeve opening.

[0016] In the present invention, the length of the pressing plate is less than the width of the inner cavity of the rubber sleeve opening, which can effectively prevent the right - angle interference of the two pressing plates at 90 degrees and improve the sealing performance.

[0017] As a preferred technical solution of the present invention, the elastic component includes a spring.

[0018] As a preferred technical solution of the present invention, at least 1 spring is independently arranged between each pressing plate and the inner wall of the frame body.

[0019] In the present invention, the number of springs can be selected according to the size of the rubber sleeve opening and the sealing requirement, and no further limitation is made herein. When the number of springs is not less than 2, the springs are arranged at equal intervals. The properties of the springs, such as material, compression performance, etc., can be specifically selected according to the sealing requirement, and no specific limitation is made herein.

[0020] As a preferred technical solution of the present invention, the plug body is a bolt.

[0021] As a preferred technical solution of the present invention, the inner wall of the fixing hole is provided with threads, and the threads correspond to the threads of the bolt.

[0022] As a preferred technical solution of the present invention, at least 1 fixing hole is independently provided on each side wall of the frame body.

[0023] In the present invention, the number of bolts can be selected according to the size of the rubber sleeve opening and the sealing requirement, and no further limitation is made herein. When the number of bolts is not less than 2, the bolts are arranged at equal intervals. The properties of the bolts, such as material, thread pitch, etc., can be specifically selected according to the sealing requirement, and no specific limitation is made herein.

[0024] In the present invention, a protruding fixing ring is provided on the frame body, and the plug body is placed in the fixing ring to prevent the plug body from falling off.

[0025] In the present invention, the usage method of the cold isostatic pressing powder encapsulation structure includes:

[0026] Load the powder into the sleeve. After cleaning the rubber sleeve opening, insert the rubber plug into the rubber sleeve opening; place the frame body outside the rubber sleeve opening, place the pressing plate corresponding to each side of the frame body, place the elastic component between the pressing plate and the corresponding side of the frame body, and the plug body moves towards the pressing plate through the fixing hole to fix the pressing plate, and the elastic component is in a compressed state to complete the sealing.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects:

[0028] The present invention provides a cold isostatic pressing powder encapsulation structure, which does not need to use a sealing glue, prevents oil from entering the rubber sleeve, and avoids the pollution of the materials inside the rubber sleeve. Description of the Drawings

[0029] Figure 1 Structural schematic diagram of the cold isostatic pressing powder encapsulation structure provided by the embodiment of the present invention;

[0030] In the figure: 1-frame body, 2-pressing plate, 3-elastic component, 4-plug body, 5-rubber sleeve, 6-rubber plug.

[0031] The present invention will be further described in detail below. However, the following examples are merely simple examples of the present invention and do not represent or limit the scope of the claimed protection of the present invention. The scope of protection of the present invention shall be subject to the claims. Specific embodiments

[0032] To better illustrate the present invention and facilitate understanding of its technical solution, typical but non-limiting embodiments of the present invention are as follows:

[0033] Embodiment

[0034] This embodiment provides a cold isostatic pressing powder encapsulation structure, the structure of which is as Figure 1 shown. The encapsulation structure includes a rubber sleeve, the rubber sleeve is provided with a rubber sleeve opening 5 and a rubber plug 6, a frame body 1 is arranged outside the rubber sleeve opening 5, the frame body is rectangular, a pressing plate 2 is arranged between the inner wall of the frame body and the rubber sleeve opening 5, the pressing plate 2 is in contact with the edge of the rubber sleeve opening 5, and one elastic component 3 is arranged between the pressing plate 2 and the inner wall of the frame body 1. The elastic component is a spring, and the elastic component 3 is in a compressed state;

[0035] Two fixing holes are arranged on the side wall of the frame body 1, a bolt body 4 passes through the fixing holes and is in contact with the pressing plate 2 for fixing the pressing plate 2. The bolt body 4 is a bolt, and threads are arranged on the inner wall of the fixing holes, and the threads correspond to the threads of the bolt.

[0036] Comparative example

[0037] In this comparative example, the rubber sleeve opening 5 and the rubber plug 6 are sealed with a sealant, and iron wire is wound outside the rubber sleeve opening 5 for fixation.

[0038] Molybdenum powder (purity 99.95%, particle size not greater than 1 μm) is filled into the rubber sleeve, and the rubber sleeve is sealed in the ways provided by the embodiment and the comparative example respectively, with 20 sealed samples in each of the embodiment and the comparative example; the rubber sleeve is subjected to cold isostatic pressing treatment at a pressure of 120 MPa and a pressure holding time of 4 h. After the cold isostatic pressing treatment, the samples in the rubber sleeve are taken out to observe whether there is an oil ingress phenomenon.

[0039] The experimental results show that after the cold isostatic pressing treatment is carried out by adopting the sealing method of the embodiment, no oil ingress phenomenon occurs in all 20 samples, while after the cold isostatic pressing treatment is carried out by adopting the traditional sealing method of the comparative example, 3 out of 20 samples have the oil ingress phenomenon. It can be seen that the sealing method provided by the embodiment of the present application improves the sealing effect of the cold isostatic pressing rubber sleeve and effectively prevents the occurrence of the oil ingress phenomenon.

[0040] The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvement to the present invention, the equivalent replacement of the components selected for the present invention, the addition of auxiliary components, and the selection of specific methods, etc., all fall within the protection scope and the disclosure scope of the present invention.

[0041] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0042] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0043] In addition, any combination can be made between various different embodiments of the present invention, as long as it does not violate the idea of the present invention, it should also be regarded as the content disclosed by the present invention.

Claims

1. A cold isostatic pressing powder packaging structure, characterized in that: The packaging structure comprises a rubber sleeve, the rubber sleeve is provided with a rubber sleeve opening and a rubber plug, a frame is provided outside the rubber sleeve opening, a pressing plate is provided between the inner wall of the frame and the rubber strip opening, the pressing plate is in contact with the edge of the rubber sleeve opening, an elastic component is provided between the pressing plate and the inner wall of the frame, and the elastic component is in a compressed state; The side wall of the frame is provided with a fixing hole, and the bolt body passes through the fixing hole and contacts the pressing plate to fix the pressing plate.

2. The cold isostatic pressing powder packaging structure according to claim 1, characterized in that: The frame is a polygonal frame.

3. The cold isostatic pressing powder packaging structure according to claim 2, characterized in that: The frame is a rectangular frame.

4. The cold isostatic pressing powder packaging structure according to claim 1, characterized in that: The number of the pressing plates is not less than 4.

5. The cold isostatic pressing powder packaging structure according to claim 1, characterized in that: The length of the pressing plate is not greater than the width of the rubber sleeve opening.

6. The cold isostatic pressing powder packaging structure according to claim 1, characterized in that: The elastic component includes a spring.

7. The cold isostatic pressing powder packaging structure according to claim 6, characterized in that: At least one spring is independently arranged between each of the pressing plates and the inner wall of the frame.

8. The cold isostatic pressing powder packaging structure according to claim 1, characterized in that: The bolt body is a bolt.

9. The cold isostatic pressing powder packaging structure according to claim 1, characterized in that: The inner wall of the fixing hole is provided with threads, and the threads correspond to the threads of the bolt.

10. The cold isostatic pressing powder packaging structure according to claim 2, characterized in that: Each side wall of the frame is independently provided with at least one fixing hole.

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