A rubber transfer mold structure

Abstract

The present invention discloses a novel rubber transfer mold structure, including an upper mold, a lower mold and a movable mold core, the upper mold is provided with a first boss, the lower mold is provided with a second boss, the movable mold core is provided with a third boss, the upper mold and the movable mold core are both arranged on the upper part of the lower mold, and the movable mold core is arranged in the inner hole of the upper mold; when the upper mold and the lower mold are close to each other and abutted, an injection cavity can be formed between the upper mold and the movable mold core, a flow channel can be formed between the first boss, the second boss and the third boss, a cavity can be formed between the third boss and the lower mold, and the injection cavity, the flow channel and the cavity are connected. The present invention also proposes a novel rubber transfer mold structure, which makes the mold structure simple, the mold processing cycle short, and the processing cost reduced; the vulcanization molding operation is simple and fast, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of rubber product vulcanization molding equipment, and in particular to a rubber transfer mold structure. Background Art

[0002] The molding methods of rubber products include compression molding, transfer molding and injection molding, among which compression molding and transfer molding are the most commonly used in various manufacturers. Compression molding molds have the advantages of simple structure, low operation difficulty, and less vulcanized rubber edges. However, the molding defect rate of rubber products is relatively high, and the thickness and size of the products fluctuate greatly. In addition, the rubber flows fast and the pressure is high during the filling process, which can easily cause deformation or damage to the weak structure of the mold cavity. For products that require exposed skeletons, it is easy to cause poor rubber coating of the exposed skeleton parts. The products produced by conventional transfer molding molds have stable dimensions and beautiful appearance. They are highly tolerant of weak structures in the mold cavity. When used in the production of exposed skeleton products, the sealing effect is good. When used in the production of products with slender hole structures, the mold core is not easy to deform or damage. However, the structure of conventional transfer molding molds is relatively complex, the cleaning of vulcanized rubber edges is inconvenient, the operation is relatively cumbersome, and the amount of vulcanized rubber edges is relatively large. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a rubber transfer mold structure, which makes the mold structure simple, the mold processing cycle short, and the processing cost reduced; the vulcanization molding operation is simple and fast, and the production efficiency is improved; the amount of vulcanized rubber edge is small, and the material cost is reduced.

[0004] According to the rubber transfer mold structure of the embodiment of the present invention, it includes an upper mold, a lower mold and a movable mold core, the upper mold is provided with a first boss, the lower mold is provided with a second boss, and the movable mold core is provided with a third boss. The upper mold and the movable mold core are both arranged on the upper part of the lower mold, and the movable mold core is arranged in the inner hole of the upper mold; when the upper mold and the lower mold are close to each other and abutted, an injection cavity can be formed between the upper mold and the movable mold core, a flow channel can be formed between the first boss, the second boss and the third boss, and a mold cavity can be formed between the third boss and the lower mold, and the injection cavity, the flow channel and the mold cavity are connected.

[0005] According to the rubber transfer mold structure of the embodiment of the present invention, at least the following beneficial effects are achieved: when the mold is in an empty mold state, the upper mold is pulled up to open the mold, the movable mold core is ejected and hung on the upper mold, and the molded rubber is circled along the movable mold core to complete the placement of the rubber material. When the mold is closed, the outer circle of the third boss of the movable mold core enters the inner circle of the first boss of the upper mold, and the cooperation of the movable mold core and the upper mold forms a relatively closed injection cavity. When the mold is further closed, the third boss of the movable mold core cooperates with the first boss of the upper mold and the second boss of the lower mold to form a flow channel. The outer circle of the first boss of the upper mold enters the inner circle of the second boss of the lower mold to close the flow channel. When the mold closing pressure is applied to the mold, high pressure is formed in the injection cavity. Under the action of the high pressure, the bottom surface of the movable mold core is tightly attached to the product skeleton, and the cavity is closed. Under the action of the high pressure, the rubber flows along the flow channel to the cavity until the cavity is filled. After vulcanization is completed, the upper mold is pulled up again to open the mold, the movable mold core is ejected and hung on the upper mold, and finally the vulcanized product is ejected from the mold together with the rubber edge. The final molded product has less vulcanized rubber edges and is easy and quick to clean. The rubber transfer mold makes the mold structure simple, the mold processing cycle is short, and the processing cost is reduced; the vulcanization molding operation is simple and fast, which improves production efficiency; the vulcanized rubber edges are less, which reduces material costs.

[0006] According to some embodiments of the present invention, the upper mold is further provided with a sealing hole, and the movable mold core is provided with a sealing shaft; when the upper mold and the lower mold are brought close to and abutted against each other, the sealing shaft and the sealing hole abut against each other.

[0007] According to some embodiments of the present invention, the first boss is disposed on the bottom surface of the upper mold.

[0008] According to some embodiments of the present invention, the second boss is disposed on the top surface of the lower mold.

[0009] According to some embodiments of the present invention, the third boss is disposed on the outer periphery of the movable mold core, and the third boss is used to place the molding rubber.

[0010] According to some embodiments of the present invention, the lower mold is provided with a placement cavity for placing the product skeleton.

[0011] According to some embodiments of the present invention, a bottom surface of the upper mold is provided with a recessed portion, and the recessed portion can be connected to the second boss.

[0012] According to some embodiments of the present invention, the upper mold is made of steel.

[0013] According to some embodiments of the present invention, the lower mold is made of steel.

[0014] According to some embodiments of the present invention, the movable mold core is made of steel.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 A schematic structural diagram of a rubber transfer mold structure according to an embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of the main material cavity and flow channel formation structure of a rubber transfer mold structure according to an embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of a conventional rubber compression molding die;

[0020] Figure 4 This is a schematic diagram of the structure of a conventional rubber transfer molding mold.

[0021] Reference numerals:

[0022] The upper mold 100, the first boss 110, the sealing hole 120, the recessed portion 130, the lower mold 200, the second boss 210, the placement cavity 220, the movable mold core 300, the sealing shaft 310, the third boss 320, the molding rubber 400, the product skeleton 500, the injection cavity 600, the runner 700, the mold cavity 800, the first mold part 100a, the second mold part 200a, the third mold part 300a, the fourth mold part 100b, the fifth mold part 200b, the sixth mold part 300b, and the top block 400b. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the description of the present invention, unless otherwise clearly defined, words such as setting and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0026] Reference Figures 1 to 4 The embodiment of the present invention provides a rubber transfer mold structure, including an upper mold 100, a lower mold 200 and a movable mold core 300, the upper mold 100 is provided with a first boss 110, the lower mold 200 is provided with a second boss 210, and the movable mold core 300 is provided with a third boss 320. The upper mold 100 and the movable mold core 300 are both arranged on the upper part of the lower mold 200, and the movable mold core 300 is arranged in the inner hole of the upper mold 100; when the upper mold 100 and the lower mold 200 are close to each other and abutted, an injection cavity 600 can be formed between the upper mold 100 and the movable mold core 300, a flow channel 700 can be formed between the first boss 110, the second boss 210 and the third boss 320, and a cavity 800 can be formed between the third boss 320 and the lower mold 200, and the injection cavity 600, the flow channel 700 and the cavity 800 are connected. When the mold is in an empty mold state, pull up the upper mold 100 to open the mold, the movable mold core 300 is ejected and hung on the upper mold 100, and the molded rubber 400 is circled along the movable mold core 300 to complete the placement of the rubber material. When the mold is closed, the outer circle of the third boss 320 of the movable mold core 300 enters the inner circle of the first boss 110 of the upper mold 100, and the cooperation of the movable mold core 300 and the upper mold 100 forms a relatively closed injection cavity. When the mold is further closed, the third boss 320 of the movable mold core 300, the first boss 110 of the upper mold 100, and the second boss 210 of the lower mold 200 cooperate with each other to form a flow channel 700. The outer circle of the first boss 110 of the upper mold 100 enters the inner circle of the second boss 210 of the lower mold 200 to close the flow channel 700. When the mold clamping pressure is applied to the mold, high pressure is formed in the injection cavity 600. Under the action of high pressure, the bottom surface of the movable mold core 300 is tightly attached to the product frame 500, and the cavity 800 is closed. Under the action of high pressure, the rubber flows along the flow channel 700 to the cavity 800 until the cavity 800 is filled. After the vulcanization is completed, the upper mold 100 is pulled up again to open the mold, and the movable mold core 300 is ejected and hung on the upper mold 100. Finally, the vulcanized product is ejected from the mold together with the rubber edge. The final molded product has less vulcanized rubber edges and is easy and quick to clean. The rubber transfer mold makes the mold structure simple, the mold processing cycle short, and the processing cost is reduced; the vulcanization molding operation is simple and quick, which improves production efficiency; the amount of vulcanized rubber edges is small, which reduces material costs.

[0027] Among them, the movable mold core 300 is fixed in the inner hole of the upper mold 100 and can move up and down within a certain stroke range; the outer circle of the third boss 320 of the movable mold core 300 enters the inner circle of the first boss 110 of the upper mold 100, and fits with a large gap; the outer circle of the first boss 100 of the upper mold 100 enters the inner circle of the second boss 210 of the lower mold 200, and fits with a small gap, and finally forms the injection cavity 600 and the runner 700; the outer circle of the first boss 100 of the upper mold 100 and the inner circle of the second boss 210 of the lower mold 200 are matched with a small gap to close the runner 700.

[0028] Reference Figure 1 and Figure 2 In some specific embodiments of the present invention, the upper mold 100 is further provided with a sealing hole 120, and the movable mold core 300 is provided with a sealing shaft 310; when the upper mold 100 and the lower mold 200 are brought close to each other and abutted, the sealing shaft 310 and the sealing hole 120 abut against each other. The sealing shaft 310 of the movable mold core 300 cooperates with the sealing hole 120 of the upper mold 100 with a small gap to seal the injection cavity 600. During the mold closing process, the sealing shaft 310 of the movable mold core 300 enters the sealing hole 120 of the upper mold 100, and the cooperation between the movable mold core 300 and the upper mold 100 forms a relatively closed injection cavity 600, so that the molding rubber 400 can be more thoroughly injected into the cavity 800.

[0029] In some specific embodiments of the present invention, the first boss 110 is disposed on the bottom surface of the upper mold 100. The first boss 110 disposed on the bottom surface of the upper mold 100 enables the first boss 110 to abut against the lower mold 200 during the mold closing process.

[0030] In some specific embodiments of the present invention, the second boss 210 is disposed on the top surface of the lower mold 200. The second boss 210 disposed on the top surface of the lower mold 200 abuts against and approaches the upper mold 100 when the molds are closed.

[0031] In some specific implementations of the present invention, the third boss 320 is disposed on the outer periphery of the movable mold core 300, and the third boss 320 is used to place the molded rubber 400. The molded rubber 400 can be placed on the third boss 320, and when the injection cavity 600 is formed between the upper mold 100 and the movable mold core 300, the molded rubber 400 on the third boss 320 can be injected into the mold cavity 800.

[0032] Reference Figure 1In some specific implementations of the present invention, the lower mold 200 is provided with a placement cavity 220 for placing the product frame 500. The placement cavity 220 in the lower mold 200 can be used to place the product frame 500, and when the third boss 320 of the movable mold core 300 presses the product frame 500, one end of the product frame 500 can be injection molded by the molding rubber 400 passing through the runner 700.

[0033] In some specific embodiments of the present invention, a recessed portion 130 is provided on the bottom surface of the upper mold 100, and the recessed portion 130 can be connected to the second boss 210. When the recessed portion 130 and the second boss 210 are brought close together and connected, a flow channel 700 can be formed between the first boss 110, the second boss 210 and the third boss 320.

[0034] In some specific embodiments of the present invention, the upper mold 100, the lower mold 200 and the movable mold core 300 are all made of steel. The upper mold 100, the lower mold 200 and the movable mold core 300 are all made of steel, so that the three have strong mechanical strength, are more wear-resistant and durable, and thus the mold has a longer service life.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0036] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rubber transfer mold structure, characterized in that: The mold core comprises an upper mold, a lower mold and a movable mold core, the upper mold is provided with a first boss, the lower mold is provided with a second boss, the movable mold core is provided with a third boss, the upper mold and the movable mold core are both arranged on the upper part of the lower mold and the movable mold core is arranged in the inner hole of the upper mold; when the upper mold and the lower mold are close to each other and abutted, an injection cavity can be formed between the upper mold and the movable mold core, a flow channel can be formed between the first boss, the second boss and the third boss, a cavity can be formed between the third boss and the lower mold, and the injection cavity, the flow channel and the cavity are connected; wherein, the upper mold is also provided with a sealing hole, and the movable mold core is provided with a sealing shaft; when the upper mold and the lower mold are close to each other and abutted, the sealing shaft and the sealing hole abut each other; the first boss is arranged on the bottom surface of the upper mold; the second boss is arranged on the top surface of the lower mold.

2. The rubber transfer mold structure according to claim 1, characterized in that: The third boss is arranged on the outer periphery of the movable mold core, and the third boss is used for placing the molding rubber.

3. A rubber transfer mold structure according to any one of claims 1 to 2, characterized in that: The lower mold is provided with a placement cavity for placing the product skeleton.

4. A rubber transfer mold structure according to any one of claims 1 to 2, characterized in that: The bottom surface of the upper mold is provided with a recessed portion, and the recessed portion can be connected to the second boss.

5. The rubber transfer mold structure according to claim 1, characterized in that: The upper die is made of steel.

6. The rubber transfer mold structure according to claim 1, characterized in that: The lower die is made of steel.

7. The rubber transfer mold structure according to claim 1, characterized in that: The movable mold core is made of steel.

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