Vulcanization processing mold

Abstract

The utility model relates to the technical field of vulcanization forming molds, in particular to a vulcanization processing mold which comprises a lower mold, a middle mold and an upper mold which are connected in sequence, 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. According to the utility model, 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 utility model relates to vulcanization forming die technical field, concretely relates to a vulcanization processing die. BACKGROUND

[0002] Rubber skeleton combined parts are widely used in various fields such as bridge, automobile, aerospace, etc., and play a crucial role such as buffering and shock absorption, support, sealing, etc. However, in the actual production process, rubber will flow into the non-rubber bonding surface of the skeleton during the vulcanization process, so that excess rubber will be attached 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 and other methods are often used in the prior art. However, on the one hand, this method will make the mold processing more complex, and on the other hand, it will also increase the cost of rubber consumption.

[0003] Therefore, the industry urgently needs a mold that can quickly and conveniently solve the quality problem of rubber attached to the surface of the skeleton at a lower cost. INVENTION CONTENTS

[0004] To solve the above problems, the purpose of the utility model is to provide a vulcanization processing die and a using method thereof.

[0005] The technical scheme provided by the utility model is as follows:

[0006] In a first aspect, a vulcanization processing die includes 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 communicating with the skeleton cavity.

[0008] The middle mold and the upper mold form a rubber blank platform, and the rubber blank platform communicates with 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 blank platform is higher than the upper surface of the metal skeleton; the middle mold flange of the middle mold extrudes the edge of the upper surface of the metal skeleton, and the lower mold flange of the lower mold extrudes the lower edge of the metal skeleton, so as to separate the rubber cavity from the non-rubber bonding surface of the metal skeleton.

[0010] The height of the rubber blank platform above the upper surface of the metal skeleton is H3, and H3 is greater than or equal to 3mm; the depth of the middle mold flange pressed into the upper edge of the metal skeleton is H1; the depth of the lower mold flange pressed into the lower edge of the metal skeleton is H2, and H1 is greater than or equal to 0.1mm, and H2 is greater than or equal to 0.1mm.

[0011] As an optional technical scheme of the first aspect, the rubber blank platform communicates with the rubber cavity through an arc surface; the upper mold and the middle mold form a first matching surface, and the first matching surface includes the rubber blank platform and the arc surface.

[0012] Optionally, the first matching surface further comprises a vertical surface and a first horizontal surface; wherein the vertical surface is in communication with the rubber blank platform; and the first horizontal surface is in communication with the vertical surface.

[0013] Optionally, a second matching surface is formed between the upper die and the lower die, and the second matching surface comprises an inclined surface and a second horizontal surface; wherein the inclined surface is in communication with the rubber cavity, and the second horizontal surface is in communication with the inclined surface.

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

[0015] As an optional technical solution of the first aspect, the lower die is provided with a limiting protrusion; the limiting protrusion is used to pass through the middle through hole provided on the metal framework, so that the metal framework is positioned in the framework cavity.

[0016] As an optional technical solution of the first aspect, the upper surface of the lower die is further provided with a plurality of positioning pins; the lower surface of the middle die and the lower surface of the upper die are provided with positioning pin holes corresponding to the positioning pins.

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

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

[0019] The second aspect is a use method of the vulcanization processing mold, comprising the following steps:

[0020] The upper die, the middle die and the lower die are installed on the vulcanization machine, the mold temperature is set to 165-185°C, and after the temperature reaches, the metal framework is filled into the framework cavity;

[0021] Then, the rubber blank is filled into the rubber blank platform;

[0022] The mold is closed under the pressure of 16-20 MPa, and in the process of closing the mold, the middle die is first pressed, and the metal framework is pre-pressed; the middle die flange provided on the middle die extrudes the upper edge of the metal framework, and the lower die flange provided on the lower die extrudes the lower edge of the metal framework, so that the rubber cavity is separated from the non-rubber bonding surface of the metal framework.

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

[0024] After vulcanization for 5-10 minutes, the upper die and the middle die are separated, and the product is taken out.

[0025] Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

[0026] The processing die provided by the utility model can make the middle die press the framework first, press the framework through the middle die flange and the lower die flange, and form a closed effect. Then the rubber flows down from the rubber blank platform, at which time the rubber cannot flow into the closed part of the framework, that is, the framework surface will not be attached with extra rubber, thereby the process of removing the rubber attachment on the surface of the metal framework is omitted, the production efficiency is greatly improved, and the production cost is reduced.

[0027] The processing die provided by the utility model adopts the form of die pressing, avoids more complex injection pressing and injection die, greatly reduces the die processing cost, and simultaneously saves the consumption of rubber material, thereby greatly reducing the production cost.

[0028] The processing method is simple and convenient to operate, reliable in quality, improves the appearance quality of products, and simultaneously avoids the poor cost in the process of removing rubber caused by the traditional die design. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a product schematic view;

[0030] Figure 2 It is a schematic view when rubber is arranged on the metal framework;

[0031] Figure 3 It is a schematic view of the upper surface of the lower die in one embodiment of the application;

[0032] Figure 4 It is a partial sectional view of the forming die in one embodiment of the application;

[0033] Figure 5 It is Figure 4 The enlarged view of the middle A;

[0034] Figure 6 It is Figure 5 The enlarged view of the middle B.

[0035] Explanation of the reference numerals in the schematic view:

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

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

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

[0039] Lower die 401, lower groove 402, positioning pin 403, die lifting groove 404, limiting protrusion 405, rubber cavity 406, lower die flange 407. DETAILED DESCRIPTION

[0040] For further understanding of the content of the present application, the present application is described in detail in combination with the drawings and examples.

[0041] The structure, proportion, size and the like shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, for understanding and reading by those skilled in the art, and are not used to limit the implementation conditions of the present application, so they do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like in the specification are only for the convenience of clear description, and are not used to limit the implementation range, the change or adjustment of the relative relationship without substantial change of technical content is also regarded as the implementation scope of the present application.

[0042] As shown in Figure 1 For the product 101, only the rubber 103 needs to be arranged on the rubber bonding surface of the metal framework, and the arrangement of the rubber 103 is as shown in Figure 2 The metal framework is an aluminum square gasket with a thickness of 1 mm, and the metal framework can also be a plastic circular gasket with a thickness of 1.2 mm, which is not limited. For the non-rubber bonding surface of the product 101, the rubber needs to be avoided.

[0043] In one embodiment, as shown in Figures 3-6 The present application provides a vulcanization processing mold, which comprises a lower mold 401, a middle mold 301 and an upper mold 201 connected in sequence.

[0044] The middle mold 301 and / or the lower mold 401 are provided with a framework cavity and a rubber cavity 406 communicating with the framework cavity. Preferably, the framework cavity is arranged in the lower mold 401, and the upper surface of the framework cavity is open, so that the metal framework can be put in. When the middle mold 301 is installed on the lower mold 401, the open upper surface of the framework cavity is closed by the middle mold 301, so that a complete closed cavity is formed.

[0045] When the middle mold 301 and the upper mold 201 are closed, 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 communicates with the rubber cavity 406, and the upper mold 201 can extrude the rubber material, so that the rubber material enters the rubber cavity 406.

[0046] When the metal framework is placed in the framework cavity, the rubber bonding surface of the metal framework is located in the rubber cavity 406, and the non-rubber bonding surface of the metal framework is located in the framework cavity. It should be noted that in this scheme, after the metal framework is filled into the framework cavity, the rubber platform 302 is higher than the upper surface of the metal framework. At the same time, the middle die flange 306 provided on the middle die 301 extrudes the edge of the upper surface of the metal framework, and the lower die flange 407 provided on the lower die 401 extrudes the lower edge of the metal framework, so as to separate the rubber cavity 406 from the non-rubber bonding surface of the metal framework. In this way, the middle die 301 can first press the metal framework, and the metal framework is pressed by the middle die flange 306 and the lower die flange 407 to form a closed effect. Then the rubber flows downward from the rubber platform 302 under the extrusion of the upper die 201, that is, flows into the rubber cavity 406, and the rubber flowing into the rubber cavity 406 can be attached to the rubber bonding surface of the metal framework. Since the rubber cavity 406 is separated from the non-rubber bonding surface of the metal framework, the rubber cannot flow into the closed part of the framework at this time, that is, the non-rubber bonding surface of the framework will not be attached to the excess rubber, thereby eliminating the process of removing the rubber attached to the surface of the metal framework, greatly improving the production efficiency and reducing the production cost.

[0047] As an optional technical solution, the height of the rubber platform 302 above the upper surface of the metal framework is H3, and H3≥3mm. For example, the rubber platform 302 with a width L of 5.5mm and a height of 10mm can be provided. The rubber platform 302 can also have a width of 5.5mm and a height of 8mm. The size of the rubber platform 302 can be adjusted according to the rubber consumption and the size of the framework, but the height of the rubber platform 302 should be higher than the upper surface of the metal framework by 3mm, so as to ensure that the middle die 301 can first press the framework during vulcanization.

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

[0049] As an optional technical solution, the rubber platform 302 is in communication with the rubber cavity 406 through the arc surface 305. The first matching surface is formed between the upper die 201 and the middle die 301, and the first matching surface includes the rubber platform 302 and the arc surface 305. The first matching surface also includes the vertical surface 303 and the first horizontal surface 304. The vertical surface 303 is in communication with the rubber platform 302. The first horizontal surface 304 is in communication with the vertical surface 303.

[0050] Since the vertical surface 303 is provided, the rubber material in the rubber sheet platform 302 flows upward along the vertical surface 303 even after being pressed, and finally flows downward under the action of gravity until flowing into the rubber cavity 406, so that the rubber material can be maximally ensured to flow into the rubber cavity 406, avoiding waste of the rubber material caused by flowing to other places. In addition, the first horizontal surface 304 can form a barrier, i.e., the first horizontal surface 304 and the vertical surface 303 can form a labyrinth structure, avoiding dust and other sundries directly entering the rubber cavity 406 along the vertical surface 303.

[0051] The second matching surface is formed between the upper die 201 and the lower die 401, and the second matching surface includes the inclined surface 203 and the second horizontal surface 204. The inclined surface 203 is communicated with the rubber cavity 406, and the second horizontal surface 204 is communicated with the inclined surface 203.

[0052] Since the inclined surface 203 is provided, the rubber material in the rubber sheet platform 302 flows upward along the inclined surface 203 even after being pressed, and finally flows downward under the action of gravity until flowing into the rubber cavity 406, so that the rubber material can be maximally ensured to flow into the rubber cavity 406, avoiding waste of the rubber material caused by flowing to other places. In addition, the inclined surface 203 can also play a role of a guide groove, which is beneficial to the die closing of the upper die 201. In addition, the second horizontal surface 204 can form a barrier, i.e., the second horizontal surface 204 and the inclined surface 203 can form a labyrinth structure, avoiding dust and other sundries directly entering the rubber cavity 406 along the inclined surface 203.

[0053] In order to facilitate subsequent edge tearing, the edge tearing groove 205 is arranged on the upper die 201 and / or the lower die 401. 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 filling of the metal framework into the framework cavity, the limiting protrusion 405 is arranged on the lower die 401, and the limiting protrusion 405 is used for penetrating the middle through hole 102 arranged on the metal framework, so that the metal framework is positioned in the framework cavity.

[0055] As an optional embodiment, in order to improve the precision of die closing, a plurality of positioning pins 403 are further arranged on the upper surface of the lower die 401. The lower surface of the middle die 301 and the lower surface of the upper die 201 are provided with positioning pin holes corresponding to the positioning pins 403.

[0056] As an optional embodiment, the upper surface of the lower die 401 is further provided with the ejection groove 404, and the product 101 in the framework cavity can be removed through the ejection groove 404.

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

[0058] In an embodiment, the application further provides a use method of the vulcanization processing mold, comprising the following steps:

[0059] The upper die 201, the middle die 301 and the lower die 401 are installed on a vulcanization machine, and the mold temperature is set to 165-185℃. After the temperature reaches, the metal framework is filled into the framework cavity.

[0060] Then, the rubber blank is filled into the blank platform 302.

[0061] The mold is closed at a pressure of 16-20MPa, such as 19MPa or 20MPa. During the mold closing process, the middle die 301 is first pressed to pre-press the metal framework. The middle die flange 306 provided on the middle die 301 extrudes the upper surface edge of the metal framework, and the lower die flange 407 provided on the lower die 401 extrudes the lower edge of the metal framework, so as to separate the rubber cavity 406 from the non-rubber bonding surface of the metal framework.

[0062] Subsequently, the rubber flows into the rubber cavity 406 under the extrusion of the upper die 201. When the rubber flows, it cannot flow into the framework which is in a closed state, so as to realize the flow of the rubber in the specified cavity.

[0063] After vulcanization for 5-10 minutes, such as 7 minutes, 8 minutes or 10 minutes, the upper die 201 and the middle die 301 are separated, and the product 101 is taken out.

[0064] The above description of the application and its embodiments is illustrative and not restrictive, and the drawings shown are only one of the embodiments of the application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above description, without departing from the spirit of the application, similar structural forms and embodiments can be designed without creative design, which should be within the protection scope of the application.

Claims

1. A vulcanization processing mold, comprising a lower mold (401), a middle mold (301) and an upper mold (201) connected in sequence; characterized in that: the middle mold (301) and / or the lower mold (401) is provided with a skeleton cavity and a rubber cavity (406) communicating with the skeleton cavity; a rubber sheet platform (302) is formed between the middle mold (301) and the upper mold (201), and the rubber sheet platform (302) communicates with 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 sheet platform (302) is higher than the upper surface of the metal skeleton; the middle mold (301) is provided with a middle mold flange (306) extruding the edge of the upper surface of the metal skeleton, and the lower mold (401) is provided with a lower mold flange (407) extruding 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; wherein the height of the rubber sheet platform (302) above the upper surface of the metal skeleton is H3, and H3≥3mm; the depth of the middle mold flange (306) pressed into the upper edge of the metal skeleton is H1; the depth of the lower mold flange (407) pressed into the lower edge of the metal skeleton is H2, and H1≥0.1mm, H2≥0.1mm.

2. The vulcanization processing mold according to claim 1, characterized in that: the rubber sheet platform (302) communicates with the rubber cavity (406) through an arc surface (305); a first matching surface is formed between the upper mold (201) and the middle mold (301), and the first matching surface comprises the rubber sheet platform (302) and the arc surface (305).

3. The vulcanization processing mold according to claim 2, characterized in that: the first matching surface further comprises a vertical surface (303) and a first horizontal surface (304); wherein the vertical surface (303) communicates with the rubber sheet platform (302); and the first horizontal surface (304) communicates with the vertical surface (303).

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

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

6. The vulcanization processing mold according to claim 1, characterized in that: the lower mold (401) is provided with a limiting protrusion (405) for penetrating a middle through hole (102) provided in the metal skeleton, so that the metal skeleton is positioned in the skeleton cavity.

7. The vulcanization processing mold according to claim 1, characterized in that: the upper surface of the lower mold (401) is further provided 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 processing mold according to claim 1, characterized in that: The upper surface of the lower mold (401) is further provided with a mold stripping groove (404); the mold stripping groove (404) is used for unloading the product (101) in the skeleton cavity.

9. The vulcanization processing mold according to any one of claims 1-8, characterized in that: The lower surface edge of the upper mold (201) is provided with an upper groove (202); the upper surface edge of the lower mold (401) is provided with a lower groove (402).

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