Double-material cold and hot co-injection metal insert plastic mold

Abstract

The utility model provides a double-material cold and hot co-injection metal insert plastic mold. The double-material cold and hot co-injection metal insert plastic mold comprises a hot runner plate, a cold runner plate, a hot fixed mold plate, a cold fixed mold plate, a hot movable mold plate, a cold movable mold plate and a panel, wherein heat insulation plates are arranged among the runner plates, the fixed mold plate and the movable mold plate; the hot fixed mold plate is provided with a first forming groove, the hot movable mold plate is provided with a second forming groove, the cold fixed mold plate is provided with a third forming groove, the cold movable mold plate is provided with a fourth forming groove, the cold movable mold plate is provided with an elastic piece provided with a U-shaped groove, the first forming groove and the second forming groove are closed to form a first cavity, and the third forming groove and the fourth forming groove are closed to form a second forming cavity. A cold glue inlet is formed in the panel, a hot glue inlet is formed in the side face of the hot runner plate, the first cavity is used for injection molding of silica gel, the second cavity is used for injection molding of plastic, the independent fixed mold plate, the movable mold plate and the heat insulation plate arranged between the mold plates can prevent heat conduction, the heat balance effect is achieved, and the elastic piece flexibly fixes the metal insert. And the glue sealing defect caused by the size error of the metal insert is avoided.

Description

Technical Field

[0001] This utility model relates to the field of molds, and more specifically, to a dual-material hot and cold injection molding metal insert plastic mold. Background Technology

[0002] like Figure 5 The metal insert shown includes a main body, with silicone and plastic injected into both ends of the main body. Traditional injection molding involves first placing the main body in a plastic injection mold to inject plastic into one end, then placing the main body with one end covered in plastic into a silicone mold for silicone overmolding at the other end. This process involves two separate steps: the silicone needs to be heated to form the insert, while the plastic needs to be cooled to form the final product. If both processes are completed within a single mold, the following problems arise: 1. How to achieve temperature balance due to heat conduction between the two materials? 2. Dimensional errors in the metal insert during production can lead to gaps when the insert is fixed in the mold, resulting in sealing defects. Therefore, achieving dual-material co-injection of hot and cold materials into a single mold is a problem that urgently needs to be solved. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a dual-material hot and cold co-injection metal insert plastic mold, which aims to improve the above-mentioned technical problems.

[0004] This utility model is implemented as follows: A dual-material hot and cold injection molding die for metal inserts includes, from top to bottom, a panel, a runner plate, a fixed mold plate, a moving mold plate, a backing plate, an ejector plate, and a base plate; the runner plate includes a hot runner plate and a cold runner plate, the fixed mold plate includes a hot fixed mold plate and a cold fixed mold plate, the moving mold plate includes a hot moving mold plate and a cold moving mold plate, and a heat insulation plate is provided between the panel, the runner plate, the fixed mold plate, and the moving mold plate; the hot fixed mold plate has a first molding groove, the hot moving mold plate has a second molding groove, the cold fixed mold plate has a third molding groove, and the cold moving mold plate has a fourth molding groove; the cold moving mold plate has an elastic element with a U-shaped groove at one end of the fourth molding groove; the first molding groove and the second molding groove close to form a first cavity, and the third molding groove and the fourth molding groove close to form a second molding cavity; a cold injection port is provided on the panel, which connects to the first cavity; a hot injection port is provided on the side of the hot runner plate, which connects to the second molding cavity.

[0005] Furthermore, heating rods are provided above and below the first cavity for the hot-setting template and the hot-moving template, and cooling water channels are provided above and below the second molding cavity for the cold-setting template and the cold-moving template.

[0006] Furthermore, heating plates are embedded in the heat-fixing template and the heat-moving template.

[0007] Furthermore, the thermal template is further provided with a plurality of first positioning posts and a plurality of second positioning posts, the first positioning posts being located at one end of the first forming groove, and the second positioning posts being located on both sides of the first forming groove.

[0008] Furthermore, the heat-fixing template is further provided with several spring push rods, which extend into the first cavity.

[0009] Furthermore, a temperature probe is provided below the second forming groove in the thermal template.

[0010] The beneficial effects of this utility model are:

[0011] This utility model discloses a dual-material hot and cold injection molding die for metal inserts. The die has a simple structure and a clever design, comprising a panel, runner plate, fixed mold plate, moving mold plate, backing plate, ejector plate, and base plate. The runner plate includes a hot runner plate and a cold runner plate; the fixed mold plate includes a hot fixed mold plate and a cold fixed mold plate; the moving mold plate includes a hot moving mold plate and a cold moving mold plate; a heat insulation plate is provided between the panel, runner plate, fixed mold plate, and moving mold plate; the hot fixed mold plate has a first molding groove, the hot moving mold plate has a second molding groove, the cold fixed mold plate has a third molding groove, and the cold moving mold plate has a fourth molding groove. An elastic element with a U-shaped groove is provided at one end of the fourth molding groove on the cold moving mold plate. The first and second molding grooves close to form a first cavity, and the third and fourth molding grooves close to form a second cavity. A cold injection port is provided on the panel, connecting to the first cavity; a hot injection port is provided on the side of the hot runner plate, connecting to the second cavity. This invention first places the two ends of the metal insert body into the first cavity and the second molding cavity. The first cavity is used for injection molding of silicone, and the second molding cavity is used for injection molding of plastic. This allows the metal insert to be molded using two processes with one mold. The independent fixed mold and moving mold, as well as the heat insulation plate set between the molds, can prevent heat conduction and achieve a thermal balance effect. The elastic element with a U-shaped groove flexibly fixes the metal insert, avoiding sealing defects caused by dimensional errors of the metal insert. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 Schematic diagram of the dual-material hot and cold co-injection metal insert plastic mold of this utility model;

[0014] Figure 2A cross-sectional view of the dual-material hot and cold co-injection metal insert plastic mold of this utility model;

[0015] Figure 3 A schematic diagram of the moving template of the dual-material hot and cold co-injection metal insert plastic mold of this utility model;

[0016] Figure 4 A schematic diagram of the fixed template of the dual-material hot and cold co-injection metal insert plastic mold of this utility model;

[0017] Figure 5 Schematic diagram of metal insert structure.

[0018] Figure label:

[0019] Panel; 101, cold inlet;

[0020] Runner plate; 201, hot runner plate; 2011, hot inlet; 202, cold runner plate;

[0021] 30. Fixed template; 301. Hot-setting template; 3011. First forming groove; 302. Cold-setting template; 3021. Third forming groove;

[0022] 40. Moving template; 401. Hot-moving template; 4011. Second forming groove; 4012. First positioning post; 4013. Second positioning post; 402. Cold-moving template; 4021. Fourth forming groove; 4022. Elastic element with U-shaped groove;

[0023] 41. Heat insulation board;

[0024] 42. Heating rod;

[0025] 43. Cooling water circuit;

[0026] 44. Heating plate;

[0027] 50. Pad;

[0028] 60. Ejector plate;

[0029] 70. Base plate;

[0030] 80. Metal inserts; 801. Body; 802. Silicone; 803. Plastic. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] Please refer to Figure 1-2 This utility model provides a plastic mold for a dual-material hot and cold injection metal insert 80, which includes a panel 10, a runner plate 20, a fixed template 30, a moving template 40, a pad plate 50, an ejector plate 60, and a base plate 70 arranged from top to bottom, forming a complete mold structure.

[0035] Please refer to Figure 1-4Figure 1 shows that the runner plate 20 includes a hot runner plate 201 and a cold runner plate 202, the fixed template 30 includes a hot fixed template 301 and a cold fixed template 302, and the moving template 40 includes a hot moving template 401 and a cold moving template 402. The hot fixed template 301 has a first forming groove 3011, the hot moving template 401 has a second forming groove 4011, the cold fixed template 302 has a third forming groove 3021, and the cold moving template 402 has a fourth forming groove 4021. The first forming groove 2011... The first cavity is formed by the closure of the first molding groove 4011 and the second molding groove 4021, and the second molding cavity is formed by the closure of the third molding groove 3021 and the fourth molding groove 4021. A cold inlet 101 is provided on the panel 10, which is connected to the first cavity. A hot inlet 2011 is opened on the side of the hot runner plate 201, which is connected to the second molding cavity. Silicone enters the first cavity from the cold inlet to coat the main body, and plastic enters the second molding cavity from the hot inlet to coat the main body.

[0036] Specifically, the fixed template 30 and the moving template 40 are separated. The two ends of the main body 801 of the metal insert 80 are placed in the second forming groove 4011 and the fourth forming groove, respectively. Several first positioning posts 4012 and several second positioning posts 4013 are set on the moving template 401. The first positioning posts 4012 are set at one end of the first forming groove 3011, and the second positioning posts 4013 are set on both sides of the first forming groove 3011. One end of the metal insert 80 is fixed to the first positioning post 4012 through the hole, and the middle part of the main body 801 is stuck between the two second positioning posts 4013. The cold-moving template has an elastic element with a U-shaped groove at one end of the fourth molding groove. In this embodiment, the elastic element is a PEEK insert, which has the characteristics of high temperature resistance. The elastic element with the U-shaped groove has a U-shaped notch, which clamps the metal insert into the U-shaped notch. The flexible fixation can ensure that the metal insert will not have gaps within the error range, avoiding sealing problems. This fixes the metal insert 80 in the second molding groove 4011 and the fourth molding groove 4021, preventing the metal insert 80 from shifting during the glue injection process, which would cause the glue coating size error. After the metal insert 80 is placed, the hot-fixing mold 301 and the hot-moving mold 401 are closed, and the cold-fixing mold 302 and the cold-moving mold 402 are closed. The hot-fixing mold 301 is further provided with several spring push rods, which extend to the first cavity. After closing, the spring push rods press down on the metal insert 80 body 801 on the hot-moving mold 401, which further fixes the metal insert 80 body 801. Silicone 802 material is injected into the first cavity from the cold injection port 101 to form one end of the metal insert 80 body 801 silicone 802 coating. Plastic 803 is injected into the second molding cavity from the hot injection port 2011 to form the other end of the metal insert 80 body 801 plastic 803 coating. This realizes the injection molding of two different materials in one mold, improving efficiency and coating accuracy.

[0037] In addition, a heat insulation plate 41 is provided between the panel 10, the flow channel plate 20, the fixed template 30, and the moving template 40. This is because the two types of adhesives require different temperatures to be molded. Silicone 802 is molded by heat, while plastic 803 is molded by cold. Therefore, the heat insulation plate 41 can prevent heat from being transferred between the two sides, which would prevent silicone 802 and plastic 803 from being molded.

[0038] Please refer to Figure 1-4 Heating rods 42 are provided above and below the first molding cavity in the hot-setting mold 301 and the hot-moving mold 401, respectively. Cooling water channels 43 are provided above and below the second molding cavity in the cold-setting mold 302 and the cold-moving mold 402, respectively. The heating rods 42 are used for the heat-curing of the silicone 802 in the first molding cavity, and the cooling water channels are used for the cooling of the plastic 803 in the second molding cavity. Furthermore, a temperature probe is provided below the hot-moving mold 401 in the second molding groove 4011. The temperature probe can monitor the temperature in the first molding groove 3011 in real time to observe the molding process of the silicone 802.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dual-material hot and cold injection molding die for metal inserts, characterized in that, The system includes, from top to bottom, a panel, a runner plate, a fixed template, a moving template, a pad, an ejector plate, and a base plate. The runner plate includes a hot runner plate and a cold runner plate. The fixed template includes a hot fixed template and a cold fixed template. The moving template includes a hot moving template and a cold moving template. A heat insulation plate is provided between the panel, the runner plate, the fixed template, and the moving template. The hot fixed template has a first forming groove, the hot moving template has a second forming groove, the cold fixed template has a third forming groove, and the cold moving template has a fourth forming groove. The cold moving template has an elastic element with a U-shaped groove at one end of the fourth forming groove. The first and second forming grooves close to form a first cavity, and the third and fourth forming grooves close to form a second forming cavity. A cold inlet is provided on the panel, which connects to the first cavity. A hot inlet is provided on the side of the hot runner plate, which connects to the second forming cavity.

2. The dual-material hot and cold injection molding die for metal inserts according to claim 1, characterized in that: Heating rods are provided above and below the first cavity for the hot-setting template and the hot-moving template, and cooling water channels are provided above and below the second molding cavity for the cold-setting template and the cold-moving template.

3. The dual-material hot and cold injection molding die for metal inserts according to claim 1, characterized in that: The heat-fixing template and the heat-moving template are fitted with heating plates.

4. The dual-material hot and cold injection molding die for metal inserts according to claim 1, characterized in that: The thermal template is further provided with a plurality of first positioning posts and a plurality of second positioning posts. The first positioning posts are located at one end of the first forming groove, and the second positioning posts are located on both sides of the first forming groove.

5. The dual-material hot and cold injection molding die for metal inserts according to claim 1, characterized in that: The heat-setting template is further provided with several spring push rods, which extend into the first cavity.

6. The dual-material hot and cold injection molding die for metal inserts according to claim 1, characterized in that: The thermal template has a temperature probe installed below the second forming groove.

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