Injection mold with temperature control adjusting function for production of automobile ornament

Abstract

The utility model discloses an injection mold with a temperature control adjusting function for producing automobile ornaments, which comprises an upper injection mold and a lower injection mold, the upper injection mold is arranged right above the lower injection mold, the bottom of the upper injection mold is provided with an upper half molding cavity, the top of the lower injection mold is provided with a lower half molding cavity, and the upper half molding cavity is communicated with the lower half molding cavity. The upper half forming cavity is matched with the lower half forming cavity, a first heat transfer pipeline is embedded in the upper injection mold, a second heat transfer pipeline is embedded in the lower injection mold, and first three-way pipes are installed at the input end of the first heat transfer pipeline and the input end of the second heat transfer pipeline correspondingly. The temperature control system is arranged in the upper injection mold and the lower injection mold, before injection molding, the fluidity of injection molding materials is optimized through preheating of a thermal medium, it is ensured that the materials are fully filled in a mold cavity, defects are reduced, after injection molding, cooling is rapidly conducted through a cold medium, cooling forming of injection molding parts is accelerated, and the production period is shortened.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to an injection mold for producing automotive trim parts with temperature control function. Background Technology

[0002] Injection molding is one of the most commonly used production processes in the plastics processing industry, playing a crucial role, especially in the automotive manufacturing sector. With the development of the automotive industry, the production of automotive trim parts has gradually shifted from traditional metal materials to plastic materials. This not only reduces the overall weight of the car and improves fuel efficiency but also lowers production costs. As a key piece of equipment in plastic molding, the design and manufacturing level of injection molds directly affects the quality and production efficiency of automotive trim parts.

[0003] The CN217169510U patent discloses an injection mold for automotive trim parts. This injection mold for automotive trim parts redistributes the spatial ratio of the upper and lower mold cavities, making the parting line closer to the lower surface of the injection molded part. This reduces the impact on the overall appearance of the automotive trim parts caused by the injection material penetrating into the gaps of the parting line and protruding from the finished product surface.

[0004] Despite the ingenious design of the aforementioned automotive trim injection mold, which boasts several advantages such as a redistribution of the upper and lower mold cavities to improve the surface finish of the finished product and a double-layered fitting structure to enhance sealing after mold closing, the mold has a significant deficiency in its temperature control system. The mold design makes no mention of any temperature control system, such as heating or cooling devices. This lack of a temperature control system may prevent the optimization of the flowability and solidification speed of the injection molded material within the mold, hindering the shortening of the production cycle.

[0005] Therefore, it is necessary to invent an injection mold with temperature control function for the production of automotive trim parts to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide an injection mold for the production of automotive trim parts with temperature control function, so as to solve the problems in the above-mentioned technology.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an injection mold for producing automotive trim parts with temperature control function, comprising an upper injection mold and a lower injection mold, wherein the upper injection mold is positioned directly above the lower injection mold, the bottom of the upper injection mold has an upper half forming cavity, and the top of the lower injection mold has a lower half forming cavity, the upper half forming cavity and the lower half forming cavity being matched; a first heat transfer pipe is embedded inside the upper injection mold, and a second heat transfer pipe is embedded inside the lower injection mold; a first tee pipe is installed at the input end of both the first and second heat transfer pipes, and a second tee pipe is installed at the output end of both the first and second heat transfer pipes; a hot medium input interface and a cold medium input interface are respectively installed at one end of the first tee pipe, and a hot medium output interface and a cold medium output interface are respectively installed at one end of the second tee pipe; a solenoid valve is installed in the middle of each of the hot medium input interface, cold medium input interface, hot medium output interface, and cold medium output interface.

[0008] The temperature control system is formed by heat transfer pipes No. 1 and No. 2, as well as the matching tee pipes and solenoid valves. The temperature of the mold is controlled by transporting hot and cold media in the heat transfer pipes.

[0009] Preferably, the upper injection mold is provided with an upper mold fixing seat at the top, and the upper injection mold is installed at the bottom of the upper mold fixing seat.

[0010] The upper injection mold is stably installed through the upper mold fixing seat, which ensures the stability and accuracy of the mold during the injection process and prevents injection defects caused by mold shaking.

[0011] Preferably, the top of the upper mold fixing seat is equipped with a pouring gate, and the middle of the injection upper mold is provided with a runner. The top end of the runner is connected to the pouring gate, which drives the bottom end of the runner to connect with the upper half molding cavity.

[0012] The design of the gating gate and runner allows the injection material to flow evenly and smoothly into the upper molding cavity, improving the filling effect and molding quality of the injection molded parts.

[0013] Preferably, the bottom of the injection mold is provided with a lower mold fixing seat, and the injection mold is installed on the top of the lower mold fixing seat.

[0014] The injection mold is stably installed through the mold fixing seat, which provides a solid support for the mold and ensures stability and safety during the injection molding process.

[0015] Preferably, an ejector pin is installed inside the lower mold fixing seat, and a through hole is opened in the middle of the injection lower mold, the through hole is connected to the lower half molding cavity, and the ejector pin is inserted into the through hole.

[0016] The ejector pins and through holes allow the injection molded parts to be easily ejected after cooling, improving production efficiency.

[0017] Preferably, buffer springs are movably sleeved on both sides of the lower mold fixing seat, and the top of the buffer springs abuts against the injection lower mold.

[0018] The inclusion of a buffer spring provides additional cushioning, reducing the impact on the mold during injection molding and extending the mold's lifespan.

[0019] Preferably, guide grooves are provided at the four bottom corners of the upper injection mold, and guide posts are installed at the four top corners of the lower injection mold, with the guide posts matching the guide grooves.

[0020] The matching design of the guide groove and guide pillar ensures the precise alignment of the upper and lower injection molds during the mold closing process, improving the accuracy and stability of the mold.

[0021] Preferably, both the No. 1 heat transfer pipe and the No. 2 heat transfer pipe are made of copper, and both are arranged in a reciprocating meandering pattern.

[0022] The No. 1 and No. 2 heat transfer pipes are made of copper, which has excellent thermal conductivity. They are arranged in a reciprocating meandering pattern, which increases the heat transfer area and improves the heating and cooling efficiency of the mold.

[0023] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0024] 1. By preheating the mold before injection molding, the heat medium flows through the No. 1 heat transfer pipe and the No. 2 heat transfer pipe, so that the upper and lower injection molds reach the appropriate temperature. This step greatly promotes the fluidity of the injection material in the mold, ensures that the material can fill the mold cavity smoothly, reduces the generation of defects and bubbles, and improves the molding quality of the product.

[0025] 2. After injection molding is completed, a cold medium is used to rapidly cool the upper and lower injection molds by flowing through heat transfer pipes No. 1 and No. 2. This step significantly accelerates the cooling speed of the injection molded parts, enabling them to be molded faster, thereby shortening the production cycle and improving production efficiency. Attached Figure Description

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 This is an exploded view of the structure of this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the injection molding upper mold of this utility model;

[0029] Figure 4 This is a cross-sectional view of the injection molding upper mold of this utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the injection molding lower mold of this utility model;

[0031] Figure 6 This is a cross-sectional view of the injection molding lower mold of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Upper injection mold; 2. Lower injection mold; 3. Upper molding cavity; 4. Lower molding cavity; 5. Heat transfer pipe No. 1; 6. Heat transfer pipe No. 2; 7. T-connector No. 1; 8. T-connector No. 2; 9. Heat medium input interface; 10. Cold medium input interface; 11. Heat medium output interface; 12. Cold medium output interface; 13. Solenoid valve; 14. Upper mold fixing seat; 15. Sprue; 16. Runner; 17. Lower mold fixing seat; 18. Ejector pin; 19. Through hole; 20. Buffer spring; 21. Guide groove; 22. Guide post. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0035] This utility model provides, for example Figure 1-6 The figure shows an injection mold for producing automotive trim parts with temperature control function, including an upper injection mold 1 and a lower injection mold 2. The upper injection mold 1 is positioned directly above the lower injection mold 2. An upper molding cavity 3 is formed at the bottom of the upper injection mold 1, and a lower molding cavity 4 is formed at the top of the lower injection mold 2. The upper molding cavity 3 and the lower molding cavity 4 are matched. A first heat transfer pipe 5 is embedded inside the upper injection mold 1, and a second heat transfer pipe 6 is embedded inside the lower injection mold 2. The input ends of the first heat transfer pipe 5 and the second heat transfer pipe 6... Each is equipped with a No. 1 tee pipe 7. The output ends of the No. 1 heat transfer pipe 5 and the No. 2 heat transfer pipe 6 are each equipped with a No. 2 tee pipe 8. One end of the No. 1 tee pipe 7 is equipped with a hot medium input interface 9 and a cold medium input interface 10, respectively. One end of the No. 2 tee pipe 8 is equipped with a hot medium output interface 11 and a cold medium output interface 12, respectively. A solenoid valve 13 is installed in the middle of the hot medium input interface 9, the cold medium input interface 10, the hot medium output interface 11, and the cold medium output interface 12.

[0036] In one aspect of this embodiment, an upper mold 1 is provided with an upper mold fixing seat 14 at its top, and the upper mold 1 is mounted on the bottom of the upper mold fixing seat 14. A sprue 15 is installed on the top of the upper mold fixing seat 14. A runner 16 is opened in the middle of the upper mold 1, and the top end of the runner 16 is connected to the sprue 15, driving the bottom end of the runner 16 to connect with the upper half molding cavity 3. A lower mold 2 is provided with a lower mold fixing seat 17 at its bottom, and the lower mold 2 is mounted on the top of the lower mold fixing seat 17. An ejector pin 18 is installed inside the lower mold fixing seat 17. A through hole 19 is provided, which is connected to the lower half molding cavity 4. The ejector pin 18 is inserted into the through hole 19. Buffer springs 20 are movably sleeved on both sides of the lower mold fixing seat 17. The top of the buffer spring 20 abuts against the injection lower mold 2. Guide grooves 21 are provided at the four corners of the bottom of the injection upper mold 1. Guide posts 22 are installed at the four corners of the top of the injection lower mold 2. The guide posts 22 match the guide grooves 21. The first heat transfer pipe 5 and the second heat transfer pipe 6 are both made of copper and are arranged in a reciprocating meandering pattern.

[0037] Working principle of this utility model:

[0038] Refer to the instruction manual appendix Figure 1-6 When using this utility model, firstly, connect the heat medium input interface 9, the cold medium input interface 10, the heat medium output interface 11, and the cold medium output interface 12 to the corresponding pipes of the temperature control system respectively.

[0039] Before the upper injection mold 1 and the lower injection mold 2 are closed, the temperature and flow rate of the heat medium are adjusted by the temperature control system according to the characteristics of the injection material and the production requirements. The solenoid valves 13 of the heat medium input port 9 and the heat medium output port 11 are opened, allowing the heat medium to flow through the first heat transfer pipe 5 and the second heat transfer pipe 6, thereby preheating the upper injection mold 1 and the lower injection mold 2 so that the injection material can flow smoothly in the mold and completely fill the mold cavity.

[0040] After the upper injection mold 1 and the lower injection mold 2 are closed, the raw material is injected into the sprue 15 through the injection molding machine. The raw material enters the mold cavity composed of the upper half molding cavity 3 and the lower half molding cavity 4 through the runner 16. After the injection is completed, the pressure is held for a period of time.

[0041] During the pressure holding process, the temperature and flow rate of the cold medium are adjusted by the temperature control system, and the solenoid valves 13 of the cold medium input port 10 and the cold medium output port 12 are opened to allow the cold medium to flow through the first heat transfer pipe 5 and the second heat transfer pipe 6, so as to cool down the upper injection mold 1 and the lower injection mold 2, thereby accelerating the cooling and molding of the injection molded parts.

[0042] After cooling, the upper injection mold 1 and the lower injection mold 2 are opened. At the same time, the ejector pins 18 inside the lower mold fixing seat 17 push upward to eject the injection molded part from the lower half molding cavity 4, making it easy to remove the injection molded part from the mold.

Claims

1. An injection mold for producing automotive trim parts with temperature control function, comprising an upper injection mold (1) and a lower injection mold (2), characterized in that: The upper injection mold (1) is positioned directly above the lower injection mold (2). The upper injection mold (1) has an upper half-forming cavity (3) at its bottom, and the lower injection mold (2) has a lower half-forming cavity (4) at its top. The upper half-forming cavity (3) matches the lower half-forming cavity (4). A first heat transfer pipe (5) is embedded inside the upper injection mold (1), and a second heat transfer pipe (6) is embedded inside the lower injection mold (2). A first tee pipe (7) is installed at the input ends of both the first and second heat transfer pipes (5 and 6). Both the output ends of the hot pipe (5) and the second heat transfer pipe (6) are equipped with a second tee pipe (8). The first tee pipe (7) is equipped with a hot medium input interface (9) and a cold medium input interface (10) at its two ends respectively. The second tee pipe (8) is equipped with a hot medium output interface (11) and a cold medium output interface (12) at its two ends respectively. A solenoid valve (13) is installed in the middle of the hot medium input interface (9), the cold medium input interface (10), the hot medium output interface (11), and the cold medium output interface (12).

2. The injection mold for producing automotive trim parts with temperature control function according to claim 1, characterized in that: The injection mold (1) is provided with an upper mold fixing seat (14) at the top, and the injection mold (1) is installed at the bottom of the upper mold fixing seat (14).

3. The injection mold for producing automotive trim parts with temperature control function according to claim 2, characterized in that: The upper mold fixing seat (14) is equipped with a pouring port (15) on the top. The injection upper mold (1) has a runner (16) in the middle. The top of the runner (16) is connected to the pouring port (15), which drives the bottom of the runner (16) to connect with the upper half molding cavity (3).

4. The injection mold for producing automotive trim parts with temperature control function according to claim 1, characterized in that: The injection mold (2) is provided with a lower mold fixing seat (17) at the bottom, and the injection mold (2) is installed on the top of the lower mold fixing seat (17).

5. The injection mold for producing automotive trim parts with temperature control function according to claim 4, characterized in that: The lower mold fixing seat (17) is equipped with an ejector pin (18), and the injection lower mold (2) has a through hole (19) in the middle. The through hole (19) is connected to the lower half molding cavity (4), and the ejector pin (18) is inserted into the through hole (19).

6. The injection mold for producing automotive trim parts with temperature control function according to claim 4, characterized in that: Both sides of the lower mold fixing seat (17) are movably sleeved with buffer springs (20), and the top of the buffer springs (20) abuts against the injection mold (2).

7. The injection mold for producing automotive trim parts with temperature control function according to claim 1, characterized in that: The upper injection mold (1) has guide grooves (21) at the bottom four corners, and the lower injection mold (2) has guide posts (22) at the top four corners, and the guide posts (22) match the guide grooves (21).

8. The injection mold for producing automotive trim parts with temperature control function according to claim 1, characterized in that: Both the No. 1 heat transfer pipe (5) and the No. 2 heat transfer pipe (6) are made of copper, and both the No. 1 heat transfer pipe (5) and the No. 2 heat transfer pipe (6) are arranged in a reciprocating meandering pattern.

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