Vulcanization processing mold and use method thereof

Abstract

The invention relates to the technical field of vulcanization forming molds, in particular to a vulcanization machining mold and a using method thereof.The vulcanization machining mold comprises a lower mold body, a middle mold body and an upper mold body which are sequentially connected; the middle mold and / or the lower mold are / is provided with a framework cavity and a rubber cavity communicated with the framework cavity; a rubber blank platform is formed between the middle mold and the upper mold and is communicated with the rubber cavity; when the metal framework is placed in the framework cavity, the rubber combination surface of the metal framework is positioned in the rubber cavity; the rubber blank platform is higher than the upper surface of the metal framework; a middle die flange arranged on the middle die extrudes the edge of the upper surface of the metal framework, and a lower die flange arranged on the lower die extrudes the lower edge of the metal framework, so that the rubber cavity is separated from the non-rubber combination surface of the metal framework. The middle die firstly presses the framework, and the middle die flange and the lower die flange are pressed into the framework to form a sealing effect. And then the rubber flows downwards from the rubber blank platform, the rubber cannot flow into the closed position of the framework at the moment, and redundant rubber cannot be attached to the surface of the framework.

Description

Technical Field

[0001] The invention relates to the technical field of vulcanization molding dies, and in particular to a vulcanization processing die and a use method thereof. Background Art

[0002] Rubber skeleton components are widely used in various fields such as bridges, automobiles, and aerospace, playing vital roles such as buffering, shock absorption, support, and sealing. However, in the actual production process, the rubber will flow into the non-rubber bonding surface of the skeleton during the vulcanization process, so that excess rubber will adhere to the non-rubber bonding surface of the metal skeleton, which is difficult to remove in subsequent processes. In order to solve this problem, injection molding and other methods are often used in the prior art. However, on the one hand, this method will make mold processing more complicated, and on the other hand, it will also be accompanied by an increase in rubber consumption costs.

[0003] Therefore, the industry is in urgent need of a mold that can quickly, conveniently and at a lower cost solve the quality problem of rubber attached to the skeleton surface. Summary of the invention

[0004] To solve the above problems, the object of the present invention is to provide a vulcanization processing mold and a method for using the same.

[0005] The technical solution provided by the present invention is:

[0006] In a first aspect, a vulcanization processing mold comprises a lower mold, a middle mold, and an upper mold connected in sequence;

[0007] The middle mold and / or the lower mold is provided with a skeleton cavity and a rubber cavity connected to the skeleton cavity;

[0008] A rubber blank platform is formed between the middle mold and the upper mold, and the rubber blank platform is connected to the rubber cavity;

[0009] When the metal skeleton is placed in the skeleton cavity, the rubber bonding surface of the metal skeleton is located in the rubber cavity; the rubber embryo platform is higher than the upper surface of the metal skeleton; the middle mold flange provided in the middle mold squeezes the upper surface edge of the metal skeleton, and the lower mold flange provided in the lower mold squeezes the lower edge of the metal skeleton, so that the rubber cavity is separated from the non-rubber bonding surface of the metal skeleton;

[0010] Among them, the height of the rubber platform above the upper surface of the metal frame is H3, H3 ≥ 3mm; the depth of the middle mold flange pressed into the upper edge of the metal frame is H1; the depth of the lower mold flange pressed into the lower edge of the metal frame is H2, H1 ≥ 0.1mm, H2 ≥ 0.1mm.

[0011] As an optional technical solution of the first aspect, the rubber blank platform is connected to the rubber cavity through a curved surface; a first mating surface is formed between the upper mold and the middle mold, and the first mating surface includes the rubber blank platform and the curved surface.

[0012] Optionally, the first mating surface further includes a vertical surface and a first horizontal surface; wherein the vertical surface is connected to the rubber blank platform; and the first horizontal surface is connected to the vertical surface.

[0013] Optionally, a second mating surface is formed between the upper mold and the lower mold, and the second mating surface includes an inclined surface and a second horizontal surface; wherein the inclined surface is connected to the rubber cavity, and the second horizontal surface is connected to the inclined surface.

[0014] Optionally, the upper die and / or the lower die are provided with a tearing edge groove; the tearing edge groove is located between the inclined surface and the rubber cavity, and is communicated with the inclined surface and the rubber cavity.

[0015] As an optional technical solution of the first aspect, the lower mold is installed with a limiting protrusion, and the limiting protrusion is used to pass through the middle through hole provided on the metal skeleton to position the metal skeleton in the skeleton cavity.

[0016] As an optional technical solution of the first aspect, a plurality of positioning pins are also installed on the upper surface of the lower mold; and positioning pin holes corresponding to the positioning pins are provided on the lower surface of the middle mold and the lower surface of the upper mold.

[0017] As an optional technical solution of the first aspect, the upper surface of the lower mold is also provided with a demolding groove; the demolding groove is used to remove the product in the skeleton cavity.

[0018] As an optional technical solution of the first aspect, an upper groove is provided on the edge of the lower surface of the upper mold; and a lower groove is provided on the edge of the upper surface of the lower mold.

[0019] In a second aspect, a method for using a vulcanization mold comprises the following steps:

[0020] Install the upper mold, middle mold and lower mold on the vulcanizer, set the mold temperature to 165-185°C, and when the temperature reaches the required level, fill the metal skeleton into the skeleton cavity;

[0021] Then fill the rubber blank into the rubber blank platform;

[0022] The mold is closed with a pressure of 16-20MPa. During the mold closing process, the middle mold is firstly pressurized to press the metal frame in advance; the middle mold flange provided in the middle mold squeezes the upper surface edge of the metal frame, and the lower mold flange provided in the lower mold squeezes the lower edge of the metal frame, so that the rubber cavity is separated from the non-rubber bonding surface of the metal frame;

[0023] Then the rubber material flows into the rubber cavity under the extrusion of the upper die;

[0024] After vulcanization for 5 to 10 minutes, separate the upper mold and the middle mold and take out the product.

[0025] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0026] The processing mold proposed by the present invention allows the middle mold to press the frame first, and the frame is pressed into the frame through the middle mold flange and the lower mold flange to form a sealing effect. Then the rubber is allowed to flow downward from the rubber embryo platform, and at this time the rubber cannot flow into the frame sealing part, that is, no excess rubber is attached to the frame surface, thereby eliminating the process of removing the rubber attached to the metal frame surface, greatly improving the production efficiency and reducing the production cost.

[0027] The processing mold proposed by the present invention adopts the form of molding, avoiding more complicated injection molding and injection molds, greatly reducing the mold processing cost, and at the same time eliminating the consumption of rubber materials, greatly reducing the production cost.

[0028] The processing method of the present invention is easy to operate and has reliable quality, improves the appearance quality of the product, and avoids the adverse cost of "removing rubber" in the subsequent process caused by traditional mold design. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the product;

[0030] Figure 2 This is a schematic diagram of setting rubber on a metal frame;

[0031] Figure 3 This is a schematic diagram of the upper surface of the lower mold in one embodiment of the present application;

[0032] Figure 4 A partial cross-sectional view of a molding die in one embodiment of the present application;

[0033] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0034] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0035] Explanation of the symbols in the schematic diagram:

[0036] Product 101, through hole 102, rubber 103;

[0037] Upper die 201, upper groove 202, inclined surface 203, second horizontal surface 204, tearing edge groove 205;

[0038] Middle mold 301, rubber blank platform 302, vertical surface 303, first horizontal surface 304, arc surface 305, middle mold flange 306;

[0039] The lower mold 401 , the lower groove 402 , the positioning pin 403 , the demoulding groove 404 , the limiting protrusion 405 , the rubber cavity 406 , and the lower mold flange 407 . DETAILED DESCRIPTION

[0040] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0041] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0042] like Figure 1 As shown, for the product 101, it only needs to set the rubber 103 on the rubber bonding surface of the metal skeleton. The setting of the rubber 103 is as follows Figure 2 The metal frame is a square aluminum gasket with a thickness of 1 mm, and the metal frame can also be a plastic circular gasket with a thickness of 1.2 mm, which is not limited here. For the non-rubber joint surface of the product 101, it is necessary to avoid rubber adhesion.

[0043] In one embodiment, if Figure 3-6 As shown, the present application proposes a vulcanization processing mold, including a lower mold 401, a middle mold 301, and an upper mold 201 connected in sequence.

[0044] A skeleton cavity and a rubber cavity 406 connected to the skeleton cavity are provided in the middle mold 301 and / or the lower mold 401. Preferably, the skeleton cavity is provided in the lower mold 401, and the upper surface of the skeleton cavity is open so that a metal skeleton can be placed in it. After the middle mold 301 is installed on the lower mold 401, the open upper surface of the skeleton cavity is closed by the middle mold 301, thereby forming a completely closed cavity.

[0045] When the middle mold 301 is molded with the upper mold 201, a rubber blank platform 302 is formed between the middle mold 301 and the upper mold 201, and the rubber blank can be placed on the rubber blank platform 302. At the same time, the rubber blank platform 302 is connected to the rubber cavity 406, and the upper mold 201 can squeeze the rubber material so that the rubber material enters the rubber cavity 406.

[0046] When the metal skeleton is placed in the skeleton cavity, the rubber bonding surface of the metal skeleton is located in the rubber cavity 406, while the non-rubber bonding surface of the metal skeleton is located in the skeleton cavity. It should be noted that in this solution, after the metal skeleton is filled into the skeleton cavity, the rubber embryo platform 302 is higher than the upper surface of the metal skeleton. At the same time, the middle mold flange 306 provided in the middle mold 301 squeezes the edge of the upper surface of the metal skeleton, and the lower mold flange 407 provided in the lower mold 401 squeezes the lower edge of the metal skeleton, so that the rubber cavity 406 is separated from the non-rubber bonding surface of the metal skeleton. In this way, the middle mold 301 can first press the metal skeleton, and the skeleton is pressed into the skeleton through the middle mold flange 306 and the lower mold flange 407 to form a sealing effect. Then the rubber will flow downward from the rubber embryo platform 302 under the squeezing action of the upper mold 201, that is, flow into the rubber cavity 406, and the rubber flowing into the rubber cavity 406 can adhere to the rubber bonding surface of the metal skeleton. Since the rubber cavity 406 and the non-rubber bonding surface of the metal skeleton are separated, the rubber cannot flow into the closed part of the skeleton at this time, that is, no excess rubber will adhere to the non-rubber bonding surface of the skeleton, thereby eliminating the process of removing the rubber adhered to the surface of the metal skeleton, greatly improving production efficiency and reducing production costs.

[0047] As an optional technical solution, the height of the rubber platform 302 above the upper surface of the metal skeleton is H3, H3 ≥ 3mm, for example, the rubber platform 302 with a width L of 5.5mm and a height of 10mm can be set. The rubber platform 302 can also be 5.5mm wide and 8mm high. The size of the rubber platform 302 can be adjusted according to the rubber consumption and the size of the skeleton, but the height of the rubber platform 302 needs to be 3mm higher than the upper surface of the metal skeleton to ensure that the middle mold 301 pre-presses the skeleton first during vulcanization.

[0048] As an optional embodiment, the depth of the middle die flange 306 pressed into the upper edge of the metal frame is H1, and the depth of the lower die flange 407 pressed into the lower edge of the metal frame is H2, H1≥0.1mm, H2≥0.1mm, for example, H1 is 0.13mm, H1 can also be 0.15mm, H2 can be 0.13mm, H2 can also be 0.15mm. The depth of the middle die flange 306 and the lower die flange 407 pressed into the metal frame can be adjusted according to the hardness and thickness of the material of the frame.

[0049] As an optional technical solution, the rubber blank platform 302 is connected to the rubber cavity 406 through the arc surface 305. A first mating surface is formed between the upper mold 201 and the middle mold 301, and the first mating surface includes the rubber blank platform 302 and the arc surface 305. The first mating surface also includes a vertical surface 303 and a first horizontal surface 304. The vertical surface 303 is connected to the rubber blank platform 302. The first horizontal surface 304 is connected to the vertical surface 303.

[0050] Since the vertical surface 303 is provided, even if the rubber in the rubber blank platform 302 flows upward along the vertical surface 303 after being compressed, it will eventually flow downward under the action of gravity until it flows into the rubber cavity 406, thereby ensuring that the rubber can flow into the rubber cavity 406 to the greatest extent possible, and preventing the rubber from flowing to other places and causing waste of rubber. In addition, the first horizontal surface 304 can be provided to form a shield, that is, the first horizontal surface 304 and the vertical surface 303 can form a maze structure to prevent dust and other debris from directly entering the rubber cavity 406 along the vertical surface 303.

[0051] A second mating surface is formed between the upper mold 201 and the lower mold 401 , and the second mating surface includes an inclined surface 203 and a second horizontal surface 204 . The inclined surface 203 is connected to the rubber cavity 406 , and the second horizontal surface 204 is connected to the inclined surface 203 .

[0052] Since the inclined surface 203 is provided, even if the rubber in the rubber blank platform 302 flows upward along the inclined surface 203 after being pressed, it will eventually flow downward under the action of gravity until it flows into the rubber cavity 406, thereby ensuring that the rubber can flow into the rubber cavity 406 to the greatest extent, and avoiding the rubber flowing to other places and causing waste of rubber. In addition, the inclined surface 203 can also play the role of a guide groove, which is conducive to the closing of the upper mold 201. In addition, the second horizontal surface 204 can be provided to form a shield, that is, the second horizontal surface 204 and the inclined surface 203 can form a maze structure to prevent dust and other debris from directly entering the rubber cavity 406 along the inclined surface 203.

[0053] In order to facilitate the subsequent edge tearing, the upper mold 201 and / or the lower mold 401 are provided with an edge tearing groove 205. The edge tearing groove 205 is located between the inclined surface 203 and the rubber cavity 406, and is communicated with the inclined surface 203 and the rubber cavity 406.

[0054] Optionally, in order to facilitate the filling of the metal skeleton into the skeleton cavity, a limiting protrusion 405 is installed on the lower mold 401, and the limiting protrusion 405 is used to pass through the middle through hole 102 provided on the metal skeleton to position the metal skeleton in the skeleton cavity.

[0055] As an optional implementation scheme, in order to improve the precision of mold closing, a plurality of positioning pins 403 are further installed on the upper surface of the lower mold 401. Positioning pin holes corresponding to the positioning pins 403 are provided on the lower surface of the middle mold 301 and the lower surface of the upper mold 201.

[0056] As an optional implementation, the upper surface of the lower mold 401 is further provided with a demolding groove 404, through which the product 101 in the skeleton cavity can be removed.

[0057] In addition, an upper groove 202 is provided at the lower surface edge of the upper mold 201, and a lower groove 402 is provided at the upper surface edge of the lower mold 401. The upper groove 202 and the lower groove 402 provide a force application space for removing the upper mold 201 and the middle mold 301.

[0058] In one embodiment, the present application also provides a method for using a vulcanization mold, comprising the following steps:

[0059] Install the upper mold 201, the middle mold 301, and the lower mold 401 on the vulcanizer, set the mold temperature to 165-185°C, and after the temperature is reached, fill the metal skeleton into the skeleton cavity;

[0060] Then fill the rubber blank onto the rubber blank platform 302;

[0061] The mold is closed by applying a pressure of 16 to 20 MPa, for example, 19 MPa or 20 MPa. In the process of closing the mold, the middle mold 301 is firstly pressurized to press the metal frame in advance; the middle mold flange 306 provided in the middle mold 301 squeezes the upper surface edge of the metal frame, and the lower mold flange 407 provided in the lower mold 401 squeezes the lower edge of the metal frame, so that the rubber cavity 406 is separated from the non-rubber bonding surface of the metal frame;

[0062] Then, the rubber material flows into the rubber cavity 406 under the extrusion of the upper mold 201. When the rubber flows, it cannot flow into the closed skeleton, so that the rubber flows in the specified cavity.

[0063] After vulcanization for 5 to 10 minutes, for example, 7 minutes, 8 minutes, or 10 minutes, the upper mold 201 and the middle mold 301 are separated to take out the product 101.

[0064] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A vulcanization processing mold, comprising a lower mold (401), a middle mold (301), and an upper mold (201) connected in sequence; Features: The middle mold (301) and / or the lower mold (401) are provided with a skeleton cavity and a rubber cavity (406) connected to the skeleton cavity; A rubber embryo platform (302) is formed between the middle mold (301) and the upper mold (201), and the rubber embryo platform (302) is connected to the rubber cavity (406); When the metal skeleton is placed in the skeleton cavity, the rubber bonding surface of the metal skeleton is located in the rubber cavity (406); the rubber embryo platform (302) is higher than the upper surface of the metal skeleton; the middle mold flange (306) provided on the middle mold (301) squeezes the upper surface edge of the metal skeleton, and the lower mold flange (407) provided on the lower mold (401) squeezes the lower edge of the metal skeleton, so that the rubber cavity (406) is separated from the non-rubber bonding surface of the metal skeleton; The height of the rubber embryo platform (302) above the upper surface of the metal frame is H3, H3≥3mm; the depth of the middle mold flange (306) pressed into the upper edge of the metal frame is H1; the depth of the lower mold flange (407) pressed into the lower edge of the metal frame is H2, H1≥0.1mm, H2≥0.1mm.

2. The vulcanization mold according to claim 1, characterized in that: The rubber embryo platform (302) is connected to the rubber cavity (406) via an arc surface (305); A first mating surface is formed between the upper mold (201) and the middle mold (301), and the first mating surface includes the rubber blank platform (302) and the arc surface (305).

3. The vulcanization mold according to claim 2, characterized in that: The first matching surface also includes a vertical surface (303) and a first horizontal surface (304); wherein the vertical surface (303) is connected to the rubber embryo platform (302); and the first horizontal surface (304) is connected to the vertical surface (303).

4. The vulcanization mold according to claim 2, characterized in that: A second mating surface is formed between the upper mold (201) and the lower mold (401), and the second mating surface includes an inclined surface (203) and a second horizontal surface (204); wherein the inclined surface (203) is connected to the rubber cavity (406), and the second horizontal surface (204) is connected to the inclined surface (203).

5. The vulcanization mold according to claim 4, characterized in that: The upper die (201) and / or the lower die (401) are provided with a tearing edge groove (205); The tear edge groove (205) is located between the inclined surface (203) and the rubber cavity (406), and is communicated with the inclined surface (203) and the rubber cavity (406).

6. The vulcanization mold according to claim 1, characterized in that: The lower mold (401) is provided with a limiting protrusion (405), and the limiting protrusion (405) is used to pass through a central through hole (102) provided on the metal skeleton to position the metal skeleton in the skeleton cavity.

7. The vulcanization mold according to claim 1, characterized in that: The upper surface of the lower mold (401) is also equipped with a plurality of positioning pins (403); The lower surface of the middle mold (301) and the lower surface of the upper mold (201) are provided with positioning pin holes corresponding to the positioning pins (403).

8. The vulcanization molding die according to claim 1, characterized in that: The upper surface of the lower mold (401) is also provided with a demolding groove (404); the demolding groove (404) is used to remove the product (101) in the skeleton cavity.

9. The vulcanization molding die according to any one of claims 1 to 8, characterized in that: An upper groove (202) is provided on the edge of the lower surface of the upper mold (201); and a lower groove (402) is provided on the edge of the upper surface of the lower mold (401).

10. A method for using the vulcanization mold according to claim 9, characterized in that: The following steps are involved: The upper mold (201), the middle mold (301) and the lower mold (401) are installed on a vulcanizer, and the mold temperature is set to 165-185° C. After the temperature is reached, the metal skeleton is filled into the skeleton cavity; Then, the rubber blank is filled onto the rubber blank platform (302); The mold is closed by applying pressure of 16 to 20 MPa. During the process of closing the mold, the middle mold (301) is firstly pressurized to pre-press the metal frame; the middle mold flange (306) provided on the middle mold (301) squeezes the upper surface edge of the metal frame, and the lower mold flange (407) provided on the lower mold (401) squeezes the lower edge of the metal frame, so that the rubber cavity (406) is separated from the non-rubber joint surface of the metal frame; Then, the rubber material flows into the rubber cavity (406) under the extrusion of the upper mold (201); After vulcanization for 5 to 10 minutes, the upper mold (201) and the middle mold (301) are separated and the product (101) is taken out.

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