A rubber mold for double-layer injection cylinder gasket

Abstract

This utility model relates to the field of rubber technology and discloses a rubber mold for double-layer injection cylinder gaskets, including a lower mold plate, a middle mold plate, and an upper mold plate. The upper surface of the lower mold plate mates with the lower surface of the middle mold plate to form a first cavity, and the upper surface of the middle mold plate mates with the lower surface of the upper mold plate to form a second cavity. The middle mold plate has a first injection hole connecting the first cavity and the second cavity. The upper surface of the upper mold plate has an injection nozzle, and the upper mold plate has a second injection hole connecting the injection nozzle and the second cavity. A first connector is screwed onto the middle mold plate, and a second connector is screwed onto the first connector. The upper mold plate has a slot for accommodating the first connector. This utility model uses a structure of a lower mold plate, a middle mold plate, and an upper mold plate, forming two injection cavities between the upper mold plate and the middle mold plate, and between the middle mold plate and the lower mold plate. This allows for the simultaneous production of two products in a single mold-closing process, reducing material waste and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of rubber product technology, and more specifically, to a rubber mold for a double-layer injection cylinder gasket. Background Technology

[0002] The rubber used for cylinder head gaskets is usually processed by injection molding. After heating and processing the mold, the material is injected to fix the mold in place. The melting temperature and time are controlled, and finally the rubber product is made by cooling and hardening.

[0003] However, traditional cylinder head gasket rubber molds typically employ a single-layer structure, producing only one cavity of product per molding cycle. This results in low production efficiency and a significant waste of materials and energy. Therefore, there is an urgent need to improve cylinder head gasket rubber production molds to address the problem of low production efficiency in existing technologies. Utility Model Content

[0004] The main purpose of this invention is to propose a double-layer injection rubber mold for cylinder head gaskets, which aims to solve the technical problems of material waste and low production efficiency in the existing technology of producing cylinder head gaskets by compression molding.

[0005] To achieve the above objectives, this utility model proposes a double-layer injection cylinder gasket rubber mold, comprising a lower mold, a middle mold, and an upper mold. The upper surface of the lower mold and the lower surface of the middle mold cooperate to form a first cavity, and the upper surface of the middle mold and the lower surface of the upper mold cooperate to form a second cavity. The middle mold has a first injection hole connecting the first cavity and the second cavity, and the upper surface of the upper mold has an injection nozzle. The upper mold also has a second injection hole connecting the injection nozzle and the second cavity.

[0006] This invention improves the traditional upper and lower mold plate structure into a structure of lower mold plate, middle mold plate, and upper mold plate, forming two injection cavities between the upper and middle mold plates and between the middle and lower mold plates. This allows for the simultaneous production of two products in a single mold closing process, reducing material waste and improving production efficiency.

[0007] Preferably, the upper mold plate is fixed on the heating plate of the injection molding machine, the lower mold plate is fixed on the injection molding machine platform, and the middle mold plate is fixed on the lifting device of the injection molding machine. The injection molding machine completes the opening and closing of the upper mold plate and the middle mold plate by driving the heating plate and the lifting device.

[0008] Unlike traditional upper and lower mold plates, in order to facilitate demolding, the middle mold plate is designed to be connected and fixed to the injection molding machine's lifter independently of the upper and lower mold plates. By driving the injection molding machine's heating plate and lifter, the upper and middle mold plates can move up and down to complete the overall mold opening and closing.

[0009] Preferably, the middle mold plate is screwed with a first connecting member, and the first connecting member is screwed with a second connecting member, the second connecting member being fixed to the lifter of the injection molding machine; the upper mold plate has a slot for accommodating the first connecting member. The middle mold plate has an independent driving structure, facilitating subsequent demolding.

[0010] Preferably, the upper template has an upper mounting hole, and the middle template has a first clearance groove directly opposite the upper mounting hole. The upper template is fixedly connected to the injection molding machine through the upper mounting hole.

[0011] Preferably, the lower template has a lower mounting hole, and the middle template has a second clearance groove directly opposite the lower mounting hole. The lower template is fixedly connected to the injection molding machine through the lower mounting hole.

[0012] Preferably, the upper template has a first positioning hole, the middle template has a second positioning hole and a third positioning hole, and the lower template has a fourth positioning hole. The first positioning hole and the second positioning hole are engaged by a first positioning pin, and the third positioning hole and the fourth positioning hole are engaged by a second positioning pin. The engagement of the positioning holes and positioning pins ensures precise positioning of the upper and lower cavities, preventing mold misalignment and thus avoiding impacts on product manufacturing.

[0013] Preferably, the first positioning hole has a first positioning step on the side facing the middle template, and the second positioning hole has a second positioning step on the side facing the upper template. This facilitates the insertion of the first positioning pin, which abuts against the first and second positioning steps, preventing the positioning pin from coming out.

[0014] Preferably, the third positioning hole has a third positioning step on the side facing the lower template, and the fourth positioning hole has a fourth positioning step on the side facing the middle template. This facilitates the insertion of the second positioning pin, which abuts against the first and second positioning steps, preventing the positioning pin from coming out.

[0015] Preferably, the first injection hole is tapered. When the product is demolded, the rubber parts of the two cavities are connected together through the rubber at the injection hole. Therefore, the tapered design results in less material and a thinner joint, making it easier to cut the products of the two cavities apart. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1This is a schematic diagram of the mold in the mold-closed state according to an embodiment of the present invention;

[0018] Figure 2 This is an exploded structural diagram of the mold according to an embodiment of the present utility model;

[0019] Figure 3 This is an exploded structural diagram of the mold from another perspective in an embodiment of this utility model;

[0020] Figure 4 This is a cross-sectional structural diagram of the mold according to an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the template in an embodiment of this utility model;

[0022] Figure 6 This is a schematic diagram of the template structure in an embodiment of this utility model;

[0023] Figure 7 This is a structural schematic diagram of the template from another perspective in an embodiment of this utility model;

[0024] Figure 8 This is a schematic diagram of the template structure in an embodiment of this utility model.

[0025] In the attached diagram: 1-lower template, 11-lower mounting hole, 12-fourth positioning hole, 13-fourth positioning step, 2-middle template, 21-first clearance groove, 22-second clearance groove, 23-second positioning hole, 24-third positioning hole, 25-second positioning step, 26-third positioning step, 3-upper template, 31-groove, 32-upper mounting hole, 33-first positioning hole, 34-first positioning step, 4-first cavity, 5-second cavity, 6-first injection hole, 7-injection nozzle, 8-second injection hole, 9-first connector, 10-second connector, 100-platform, 200-elevator, 300-heating plate.

[0026] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In addition, the term "comprising" and any variations thereof mean "at least comprising."

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0031] Example

[0032] Reference Figures 1-8 This embodiment provides a double-layer injection molding compound rubber mold, including a lower mold plate 1, a middle mold plate 2, and an upper mold plate 3. The upper surface of the lower mold plate 1 matches the lower surface of the middle mold plate 2 to form a first cavity 4, and the upper surface of the middle mold plate 2 matches the lower surface of the upper mold plate 3 to form a second cavity 5. By using a middle mold plate 2 with rubber grooves on both its upper and lower surfaces, and cooperating with the upper mold plate 3 and the lower mold plate 1 to form two product cavities respectively, production efficiency is improved. Figure 4As shown, the middle mold plate 2 has a first injection hole 6 connecting the first cavity 4 and the second cavity 5. The upper surface of the upper mold plate 3 has an injection nozzle 7, and the upper mold plate 3 has a second injection hole 8 connecting the injection nozzle 7 and the second cavity 5. During production, the rubber raw material fed through the injection nozzle 7 enters the first cavity 4 through the first injection hole 6 simultaneously with the second cavity 5. Therefore, injection molding of two products can be completed simultaneously. It is worth noting that, unlike traditional molds with an upper mold plate 3 and a lower mold plate 1, the mold in this embodiment has three mold plates forming two cavities. Therefore, during demolding, the upper mold plate 3 and the middle mold plate 2 need to be opened independently. Thus, the middle mold plate 2 needs to be connected to the injection molding machine relatively independently. In this embodiment, the middle mold plate 2 is screwed with a first connecting member 9, and the first connecting member 9 is screwed with a second connecting member 10. The middle mold plate 2 is fixedly connected to the injection molding machine through the first connecting member 9 and the second connecting member 10. Further, referring to… Figure 1 , Figure 5 The upper template 3 has a slot 31 corresponding to the first connector 9 to accommodate the first connector 9, allowing the upper template 3 and the lower template 1 to be separated by the driving component. On the other hand, the cooperation between the slot 31 and the first connector 9 can also realize the positioning function of the upper template 3 and the middle template 2, avoiding large offsets between the upper template 3 and the middle template 2.

[0033] With the assistance of existing injection machines and their auxiliary devices, referring to Figure 4 The upper mold plate 3 is fixed to the heating plate 300 of the injection molding machine, the lower mold plate 1 is fixed to the injection molding machine platform 100, and the middle mold plate 2 is fixed to the injection molding machine lifter 200 via the first connecting piece 9 and the second connecting piece 10. During production, the injection molding machine drives the heating plate 300 and the lifter 200 to move up and down via a drive component, thereby moving the upper mold plate 3 and the middle mold plate 2 up and down to complete the mold opening and closing. Specifically, after the vulcanization process of the rubber product is completed, when it is necessary to remove the product, the heating plate 300 can be driven to move upward first, thereby moving the upper mold plate 3 upward to remove the product from the second cavity 5, and then the lifter 200 can be driven to move upward, thereby moving the middle mold plate 2 upward to remove the product from the first cavity 4.

[0034] like Figure 1 and Figure 5 As shown, in this embodiment, the upper template 3 is provided with an upper mounting hole 32, and the upper template 3 is fixedly connected to the heating plate 300 of the injection molding machine through the upper mounting hole 32. The middle template 2 is provided with a first clearance groove 21 directly opposite the upper mounting hole 32, which facilitates the installation and fixing of the upper template 3 with screws. Figure 1 and Figure 8As shown, the lower template 1 has a lower mounting hole 11, through which it is fixedly connected to the injection molding machine platform 100. The middle template 2 has a second clearance groove 22 directly opposite the lower mounting hole 11, facilitating the installation and fixing of the lower template 1 with screws. In some special cases, such as... Figure 1 As shown, in this embodiment, the first clearance groove 21 and the second clearance groove 22 overlap. Depending on actual needs, multiple upper mounting holes 32 and lower mounting holes 11 can be provided to more stably fix the upper template 3 and the lower template 1. Correspondingly, multiple first clearance grooves 21 and second clearance grooves 22 are also provided. In this embodiment, four upper mounting holes 32 and four lower mounting holes 11 are provided.

[0035] Reference Figures 5-8 In this embodiment, the upper template 3 is provided with a first positioning hole 33, the middle template 2 is provided with a second positioning hole 23 and a third positioning hole 24, and the lower template 1 is provided with a fourth positioning hole 12. The first positioning hole 33 and the second positioning hole 23 cooperate with a first positioning pin (not shown in the figure) to achieve precise positioning of the upper template 3 and the middle template 2. The third positioning hole 24 and the fourth positioning hole 12 cooperate with a second positioning pin (not shown in the figure) to achieve precise positioning of the middle template 2 and the lower template 1. In some special embodiments, the second positioning hole 23 and the third positioning hole 24 can be designed to overlap. According to actual needs, multiple sets of the first positioning hole 33 and the second positioning hole 23, as well as the third positioning hole 24 and the fourth positioning hole 12, can be provided.

[0036] Furthermore, referring to Figures 5-8 The first positioning hole 33 has a first positioning step 34 on the side facing the middle template 2, and the second positioning hole 23 has a second positioning step 25 on the side facing the upper template 3. During actual installation, the first positioning pin can be inserted into the first positioning hole 33, with one end abutting against the first positioning step 34, and the other end inserted into the second positioning hole 23 and abutting against the second positioning step 25. This facilitates the installation of the first positioning pin and prevents it from coming out of the positioning hole. Alternatively, the first positioning pin can be inserted into the second positioning hole 23 for installation, which will not be elaborated here.

[0037] The third positioning hole 24 has a third positioning step 26 on the side facing the lower template 1, and the fourth positioning hole 12 has a fourth positioning step 13 on the side facing the middle template 2. During actual installation, the second positioning pin can be inserted into the third positioning hole 24 first, with one end abutting against the third positioning step 26, and the other end inserted into the fourth positioning hole 12 and abutting against the fourth positioning step 13. This facilitates the installation of the second positioning pin and prevents it from coming out of the positioning hole. Alternatively, the second positioning pin can be inserted into the fourth positioning hole 12 first for installation; details will not be elaborated here.

[0038] In this embodiment, refer to Figure 4 The first injection hole 6 is designed in a conical shape. When the product is demolded, the products of the two cavities are connected at the intersection of the first injection hole 6 and the second injection hole 8. Due to its conical structure, the material at the connection point is less and weaker, making it easier to cut the products of the two cavities apart by pulling or other means.

[0039] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A rubber mold for double-layer injection cylinder gaskets, characterized in that, The assembly includes a lower template (1), a middle template (2), and an upper template (3). The upper surface of the lower template (1) and the lower surface of the middle template (2) cooperate to form a first cavity (4). The upper surface of the middle template (2) and the lower surface of the upper template (3) cooperate to form a second cavity (5). The middle template (2) has a first glue injection hole (6) that connects the first cavity (4) and the second cavity (5). The upper surface of the upper template (3) has a glue injection nozzle (7) and a second glue injection hole (8) that connects the glue injection nozzle (7) and the second cavity (5).

2. The rubber mold for a double-layer injection cylinder gasket as described in claim 1, characterized in that, The upper template (3) is fixed on the heating plate (300) of the injection molding machine, the lower template (1) is fixed on the injection molding machine platform (100), and the middle template (2) is fixed on the lifting device (200) of the injection molding machine. The injection molding machine completes the opening and closing of the upper template (3) and the middle template (2) by driving the heating plate (300) and the lifting device (200).

3. The rubber mold for a double-layer injection cylinder gasket as described in claim 2, characterized in that, The middle template (2) is screwed with a first connector (9), the first connector (9) is screwed with a second connector (10), and the second connector (10) is fixed on the lifter (200) of the injection molding machine; the upper template (3) has a slot (31) for accommodating the first connector (9).

4. The rubber mold for a double-layer injection cylinder gasket as described in claim 1, characterized in that, The upper template (3) is provided with an upper mounting hole (32), and the middle template (2) is provided with a first clearance groove (21) directly opposite the upper mounting hole (32).

5. A rubber mold for a double-layer injection cylinder gasket as described in claim 1, characterized in that, The lower template (1) is provided with a lower mounting hole (11), and the middle template (2) is provided with a second clearance groove (22) directly opposite the lower mounting hole (11).

6. The rubber mold for a double-layer injection cylinder gasket as described in claim 1, characterized in that, The upper template (3) is provided with a first positioning hole (33), the middle template (2) is provided with a second positioning hole (23) and a third positioning hole (24), and the lower template (1) is provided with a fourth positioning hole (12). The first positioning hole (33) and the second positioning hole (23) are engaged by a first positioning pin, and the third positioning hole (24) and the fourth positioning hole (12) are engaged by a second positioning pin.

7. A rubber mold for a double-layer injection cylinder gasket as described in claim 6, characterized in that, The first positioning hole (33) is provided with a first positioning step (34) on the side facing the middle template (2), and the second positioning hole (23) is provided with a second positioning step (25) on the side facing the upper template (3).

8. A rubber mold for a double-layer injection cylinder gasket as described in claim 6, characterized in that, The third positioning hole (24) is provided with a third positioning step (26) on the side facing the lower template (1), and the fourth positioning hole (12) is provided with a fourth positioning step (13) on the side facing the middle template (2).

9. A rubber mold for a double-layer injection cylinder gasket as described in claim 1, characterized in that, The first injection hole (6) is conical.

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