A core-pulling injection mold for a vehicle lamp housing

Abstract

This utility model relates to a core-pulling injection mold for a car headlight housing, belonging to the field of injection mold technology. It includes a lower mold base, with a fixed molding block and a slidably connected slider on the top of the lower mold base. The molding block and slider are adjacent to each other and have a connected molding surface on their tops. The slider has first sliding portions on both sides inside, and a first sliding seat at the bottom of the slider. The bottom of the first sliding seat is fixedly connected to a connecting plate. The top of the first sliding seat has inclined first slide rails on both sides, with the end of the first slide rail closer to the center of the lower mold base being higher. The first sliding portions are slidably connected inside the first slide rails. A push plate has a fixed ejector rod, the top of which is fixedly connected to the lower mold base. In this design, the slider can separate from the car headlight housing first, reducing the force of the car headlight housing adhering to the molding surface. The molding surface on the molding block has a gentler curvature, facilitating ejection and demolding, thus solving the technical problem of deformation of the car headlight housing during demolding.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and relates to a core-pulling injection mold for a car headlight housing. Background Technology

[0002] Injection molds are a type of equipment used to produce plastic products. The plastic raw material is heated to a molten state and then injected into the molding cavity inside the mold. After the molding cavity is filled, the mold is rapidly cooled, and the molten plastic raw material cools and solidifies to form the desired plastic part. The use of injection molds to produce plastic products has advantages such as high precision and high efficiency, and is widely used in industrial production.

[0003] The headlight housing in automobiles is a product made of plastic. In the existing technology, there is an injection mold used to produce headlight housings. During the demolding process of the headlight housing, ejector pins are used to directly eject the product. However, due to the large overall curvature of the headlight housing and the fact that the edges wrap around the molding surface, the force on the headlight housing adhering to the molding surface is relatively large. Using ejector pins to directly eject the product can easily lead to uneven force on the product, resulting in deformation during the demolding process. Summary of the Invention

[0004] The purpose of this utility model is to address the problems existing in the current technology by proposing a core-pulling injection mold for car headlight housings. The technical problem to be solved by this utility model is: how to avoid deformation of the car headlight housings during the demolding process.

[0005] The objective of this utility model can be achieved through the following technical solution: A core-pulling injection mold for a car headlight housing includes a lower mold base, a connecting plate slidably connected to the bottom of the lower mold base, a foot plate fixedly connected to the bottom of the connecting plate, a base plate fixedly connected to the bottom of the foot plate, a push plate slidably connected to the inner side of the foot plate, a forming block fixedly connected to the top of the lower mold base and a sliding block slidably connected to the top of the lower mold base, the forming block and the sliding block being arranged adjacent to each other and having a connected forming surface at the top, a first sliding part being provided on both sides of the inner side of the sliding block, a first sliding seat being provided at the bottom of the sliding block, the bottom of the first sliding seat being fixedly connected to the connecting plate, and an inclined first slide rail being provided on both sides of the top of the first slide rail, the end of the first slide rail near the center of the lower mold base being higher, the first sliding part being slidably connected to the inside of the first slide rail, and a push rod fixedly connected to the push plate, the top of the push rod being fixedly connected to the lower mold base.

[0006] In this solution, the headlight housing is cooled and formed on the molding surface to form a headlight housing product with a structure corresponding to the molding surface. After the mold is opened, the headlight housing will adhere to the molding surface of the lower mold base. At this time, the push plate is pushed upward from the bottom of the base plate. The push plate drives the fixed ejector rod to move upward. The top of the ejector rod pushes the lower mold base, causing the lower mold base to separate from the connecting plate. Since the first slide block is fixed to the connecting plate, the slider on the lower mold base will move obliquely upward along the direction of the first slide rail. Since the end of the first slide rail near the center of the lower mold base is higher, the slider slides into the lower mold base. The molding surface at the top of the slider can separate from the bottom of the headlight housing, which facilitates the subsequent ejection of the headlight housing from the molding block. By using the first slide block to connect the slider, the slider can separate from the headlight housing first during the demolding process, reducing the force of the headlight housing adhering to the molding surface. The curvature of the molding surface on the molding block is relatively gentle, which facilitates ejection and demolding, thus solving the technical problem of deformation of the headlight housing during the demolding process.

[0007] In the aforementioned injection mold for the headlight housing, the slider has a second sliding part and a second slide block on both sides. The second slide block has an inclined second slide rail on the side near the slider, with the end of the second slide rail closer to the center of the lower mold base being lower. The second sliding part is slidably connected inside the second slide rail, and the second slide block is fixedly connected to the lower mold base. This structure, with second slide blocks on both sides of the slider and the inclination direction of the second slide rail opposite to that of the first slide rail, allows the slider to move obliquely downwards during the upward movement of the lower mold base, resulting in better separation from the bottom of the headlight housing.

[0008] In the aforementioned core-pulling injection mold for the headlight housing, the molding surface at the top of the molding block is higher than the molding surface at the top of the slider. The edge of the molding surface extends downwards to wrap around the top of the molding block and the slider. The molding surface at the top of the slider bends downwards, making the headlight housing as a whole curved. The edge structure of the molding surface enables the edge of the headlight housing to form a connecting structure for connection with the automobile.

[0009] In the aforementioned injection mold for the headlight housing, the push plate is provided with several fixed ejector pins. The tops of the ejector pins slide through the connecting plate and the lower mold base and extend to the bottom of the molding surface. The ejector pins are located at the edge of the molding surface. After the slider pulls the core inward, the ejector pins continue to move upward, ejecting the headlight housing out of the mold.

[0010] In the aforementioned core-pulling injection mold for the headlight housing, the top of the lower mold base is provided with a slidingly connected upper mold base. The upper mold base has a feed port, the bottom of which is connected to the molding surface. After the injection molding material is heated to a molten state, it is injected into the mold through the feed port. After the molten liquid fills the molding surface between the upper and lower mold bases, the inside of the mold is rapidly cooled, and then the upper mold base is moved to open the mold.

[0011] In the aforementioned core-pulling injection mold for the headlight housing, a spring is provided between the connecting plate and the lower mold base, with the upper and lower ends of the spring abutting against the connecting plate and the lower mold base, respectively. During demolding, the spring can push the lower mold base upward, and during mold closing, it acts as a buffer between the lower mold base and the connecting plate.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. In this solution, a first slide block is used to connect the slider, so that the slider can separate from the headlight housing before demolding, reducing the force of the headlight housing adhering to the molding surface. The curvature of the molding surface on the molding block is relatively gentle, which facilitates ejection and demolding, thus solving the technical problem of deformation of the headlight housing during demolding. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the lower mold base of this utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure of the slider, the first slide block, and the second slide block of this utility model;

[0016] Figure 3 This is a frontal half-sectional view of the structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the overall structure of the mold of this utility model.

[0018] In the figure, 1 is the lower mold base; 1a is the slider; 1a1 is the first sliding part; 1a2 is the second sliding part; 1b is the forming block; 2 is the connecting plate; 3 is the foot plate; 3a is the push plate; 3b is the ejector pin; 3c is the ejector pin; 4 is the base plate; 5 is the forming surface; 6 is the first slide block; 6a is the first slide rail; 7 is the second slide block; 7a is the second slide rail; 8 is the spring; 9 is the upper mold base; 9a is the feed port. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] Example

[0021] like Figure 1As shown, the core-pulling injection mold for the headlight housing includes a lower mold base 1. The bottom of the lower mold base 1 is provided with a slidingly connected connecting plate 2. The bottom of the connecting plate 2 is provided with a fixed foot plate 3. The bottom of the foot plate 3 is provided with a fixed base plate 4. The inner side of the foot plate 3 is provided with a slidingly connected push plate 3a. The top of the lower mold base 1 is provided with a fixedly connected molding block 1b and a slidingly connected slider 1a. The molding block 1b and the slider 1a are arranged adjacent to each other and have a connected molding surface 5 on their tops. The molding surface 5 on the top of the molding block 1b is higher than the molding surface 5 on the top of the slider 1a. The edge of the molding surface 5 extends downward to wrap around the top of the molding block 1b and the slider 1a.

[0022] like Figure 2 As shown, the slider 1a has a first sliding part 1a1 on both sides inside, and a first slide block 6 at the bottom of the slider 1a. The bottom of the first slide block 6 is fixedly connected to the connecting plate 2. The top two sides of the first slide block 6 have inclined first slide rails 6a. The end of the first slide rail 6a near the center of the lower mold base 1 is higher. The first sliding part 1a1 is slidably connected inside the first slide rail 6a. The slider 1a has a second sliding part 1a2 and a second slide block 7 on both sides. The second slide block 7 has an inclined second slide rail 7a on the side near the slider 1a. The end of the second slide rail 7a near the center of the lower mold base 1 is lower. The second sliding part 1a2 is slidably connected inside the second slide rail 7a. The second slide block 7 is fixedly connected to the lower mold base 1.

[0023] like Figure 3 As shown, the push plate 3a is provided with a fixed ejector rod 3b. The top of the ejector rod 3b is fixedly connected to the lower mold base 1. When the push plate 3a moves upward, the ejector rod 3b pushes the upper mold base 9 upward, causing the upper mold base 9 to separate from the connecting plate 2. The slider 1a moves along the direction of the first slide rail 6a and the second slide rail 7a. The slider 1a moves obliquely downward to pull the core. The push plate 3a is provided with a plurality of fixed ejector pins 3c. The top of the ejector pins 3c slides through the connecting plate 2 and the lower mold base 1 and extends to the bottom of the forming surface 5. The ejector pins 3c are located at the edge of the forming surface 5. A spring 8 is provided between the connecting plate 2 and the lower mold base 1. The upper and lower ends of the spring 8 abut against the connecting plate 2 and the lower mold base 1, respectively.

[0024] like Figure 4 As shown, the top of the lower mold base 1 is provided with a slidingly connected upper mold base 9, and the upper mold base 9 is provided with a feed port 8a, the bottom of which is connected to the forming surface 5.

[0025] The working principle of this solution is as follows: Figure 1-4As shown, after the injection molding material is heated to a molten state, it is injected into the mold through the inlet 8a. After the molten liquid fills the molding surface 5 between the upper mold base 9 and the lower mold base 1, the inside of the mold is rapidly cooled. Then the upper mold base 9 is moved to open the mold, and the headlight shell will adhere to the molding surface 5 of the lower mold base 1. At this time, the push plate 3a is pushed upward from the bottom of the base plate 4. The push plate 3a drives the fixed ejector rod 3b to move upward. The top of the ejector rod 3b pushes the lower mold base 1, causing the lower mold base 1 to separate from the connecting plate 2. The slider 1a moves along the direction of the first slide rail 6a and the second slide rail 7a. The slider 1a can move obliquely downward to pull the core, so that the molding surface 5 at the top of the slider 1a can separate from the bottom of the headlight shell, reducing the force of the headlight shell adhering to the molding surface 5. At the same time, the ejector pin 3c continues to move upward, pushing the headlight shell on the top of the molding block 1b out of the mold. Since the curvature of the molding surface 5 on the molding block 1b is relatively gentle, it is easier to eject and demold, solving the technical problem of deformation of the headlight shell during demolding.

[0026] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0027] Although this document frequently uses terms such as 1. lower mold base; 1a. slider; 1a1. first sliding part; 1a2. second sliding part; 1b. forming block; 2. connecting plate; 3. foot plate; 3a. push plate; 3b. ejector rod; 3c. ejector pin; 4. base plate; 5. forming surface; 6. first slide block; 6a. first slide rail; 7. second slide block; 7a. second slide rail; 8. spring; 9. upper mold base; 9a. feed port, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.

Claims

1. A core-pulling injection mold for a car headlight housing, comprising a lower mold base (1), wherein the lower mold base (1) has a slidingly connected connecting plate (2) at its bottom, the connecting plate (2) has a fixedly connected foot plate (3) at its bottom, the foot plate (3) has a fixedly connected bottom plate (4) at its bottom, and the inner side of the foot plate (3) has a slidingly connected push plate (3a), characterized in that, The lower mold base (1) is provided with a fixed forming block (1b) and a sliding block (1a) at the top. The forming block (1b) and the sliding block (1a) are arranged adjacent to each other and have a connected forming surface (5) at the top. The sliding block (1a) has a first sliding part (1a1) on both sides inside. The bottom of the sliding block (1a) has a first sliding seat (6). The bottom of the first sliding seat (6) is fixedly connected to the connecting plate (2). The top two sides of the first sliding seat (6) have an inclined first slide rail (6a). The end of the first slide rail (6a) closer to the center of the lower mold base (1) is higher. The first sliding part (1a1) is slidably connected inside the first slide rail (6a). The push plate (3a) is provided with a fixed push rod (3b). The top of the push rod (3b) is fixedly connected to the lower mold base (1).

2. The core-pulling injection mold for a car headlight housing according to claim 1, characterized in that, The slider (1a) has a second sliding part (1a2) and a second slide block (7) on both sides. The second slide block (7) has an inclined second slide rail (7a) on the side near the slider (1a). The end of the second slide rail (7a) near the center of the lower mold base (1) is lower. The second sliding part (1a2) is slidably connected inside the second slide rail (7a). The second slide block (7) is fixedly connected to the lower mold base (1).

3. The core-pulling injection mold for a car headlight housing according to claim 2, characterized in that, The molding surface (5) at the top of the molding block (1b) is higher than the molding surface (5) at the top of the slider (1a), and the edge of the molding surface (5) extends downward to wrap around the top of the molding block (1b) and the slider (1a).

4. The core-pulling injection mold for a car headlight housing according to claim 1, characterized in that, The push plate (3a) is provided with a plurality of fixed ejector pins (3c). The top of the ejector pins (3c) slides through the connecting plate (2) and the lower mold base (1) and extends to the bottom of the forming surface (5). The ejector pins (3c) are located at the edge of the forming surface (5).

5. The core-pulling injection mold for a car headlight housing according to claim 1, characterized in that, The lower mold base (1) has a slidingly connected upper mold base (9) at its top. The upper mold base (9) has a feed port (9a) and the bottom of the feed port (9a) is connected to the forming surface (5).

6. The core-pulling injection mold for a car headlight housing according to claim 1, characterized in that, A spring (8) is provided between the connecting plate (2) and the lower mold base (1), and the upper and lower ends of the spring (8) abut against the connecting plate (2) and the lower mold base (1) respectively.

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