Injection mold and injection method for a car door trim component

Abstract

The application relates to the technical field of injection molds, in particular to an injection mold and an injection method for an automobile door decoration component, which comprises an upper mold base and a lower mold base, the upper mold base is provided with an upper mold core, and the upper mold core is provided with a forming cavity; the lower mold base is provided with a horizontal position, a first position and a second position; when the upper mold base is lifted relative to the lower mold base to be demolded, the horizontal position can be linked to move leftwards along a first direction to be demolded; when a first top plate is lifted by a first distance, the first position can be linked to move rightwards and upwards along a second direction to be demolded and make the left end of the automobile door decoration component be deformed; when the first top plate is lifted by a second distance, one position can be linked to move rightwards and upwards along the second direction to make the automobile door decoration component be demolded from the second position. Compared with the prior art, the demolding operation of the automobile door decoration component can be completed without using a ejector pin structure, the production yield of the automobile door decoration component can be improved, and the overall structure of the injection mold can be simplified.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to an injection mold and injection method for an automotive door decorative component. Background Technology

[0002] Automotive trim components are often used as decorative strips on door panels, trim panels on the sides of the dashboard, decorative parts on the sides of the center console / gear shift area, or decorative covers on the sides of the seats. For example, please refer to the section on decorative strips on door panels. Figure 9 This is a car door decorative component designed by the inventor according to the manufacturer's requirements. The car door decorative component is mainly installed on the side of the door handle to cover the seam between the two door panels and enhance the sense of layering and design of the interior.

[0003] Currently, the inventor's production method for automotive door trim components involves injection molding using an injection mold, followed by ejection from the mold cavity using an ejector system. However, in actual production, the inventor discovered several drawbacks to this ejection method. First, because the automotive door trim components are generally slender and thin, they tend to stick to the mold cavity after injection molding. If ejector pins are used to remove them, they can easily puncture the component, significantly reducing the production yield. Second, the injection mold requires multiple ejector pins based on the length of the automotive door trim component, complicating the overall mold structure.

[0004] Therefore, a new technical solution needs to be researched to address the above problems. Summary of the Invention

[0005] In view of this, the present invention addresses the deficiencies of the prior art, and its main objective is to provide an injection mold for automotive door decorative components, effectively solving the problems of low production yield and complex structure of injection molds used for injection molding automotive door decorative components in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an injection mold for automotive door decorative components, comprising... The lower mold base includes a side slide that can move in a first direction, a first slide that can move in a second direction, and a fixedly installed second slide. The first slide moves in conjunction with a first top plate. The upper mold base has an upper mold core at the bottom, and the upper mold core has an upper forming cavity; when the upper mold base and the lower mold base are closed, the side slide, the first slide and the second slide can be injection molded with the upper forming cavity to form the car door decorative component; When the upper mold base moves upward relative to the lower mold base to open the mold, it can move the side slide to the left along the first direction to demold; when the first top plate moves up a first distance, it can move the first slide to the right and upward along the second direction to demold and cause the left end of the door decorative component to deform; when the first top plate moves up a second distance, it can move a slide to the right and upward along the second direction to demold the door decorative component from the second slide.

[0007] As a preferred embodiment, the bottom of the upper mold base is provided with a first guide rod, which is inclined from top to bottom and to the left; the side slide is provided with a first guide hole penetrating its upper and lower surfaces, which is inclined from top to bottom and to the left; the first guide rod can be inserted into the first guide hole, and when the upper mold base moves up and down relative to the lower mold base, the side slide can move left and right along the first direction through the cooperation of the first guide rod and the first guide hole.

[0008] As a preferred embodiment, a first side molding part is provided on the right side of the side carriage, and a second side molding part is provided on the left side of the first carriage. The first side carriage part and the second side molding part are used to injection mold the left extension plate of the door decorative component; a first molding part is provided at the top of the first carriage, and the first molding part is used to injection mold the left end body part of the door decorative component.

[0009] As a preferred embodiment, the first row is movably installed to the left of the second row, and a third row is provided to the right of the second row, which is movable in a third direction; a second molding part is provided on the top left of the second row, which is used to injection mold the middle left body part of the door trim component; a third molding part is provided on the top right of the second row, which is used to injection mold the middle right body part of the door trim component; a fourth molding part is provided on the top of the third row, which is used to injection mold the right end body part of the door trim component; and a fifth molding part is provided on the right side of the third row, which is used to injection mold the right extension plate of the door trim component.

[0010] As a preferred embodiment, the first top plate is movable up and down and is mounted on the lower mold base. The first top plate is provided with a first push rod for driving the first slide movement and a second push rod for driving the second slide movement.

[0011] As a preferred embodiment, when the first top plate moves up a first distance, the first moving position can be moved diagonally to the upper right along the second direction by means of the first push rod; when the first top plate moves up a second distance, the first moving position can be moved diagonally to the upper right along the second direction by means of the first push rod, while the third moving position is moved upward along the third direction by means of the second push rod, so that the top of the first moving position is higher than the top of the third moving position, and the top of the third moving position is higher than the top of the second moving position.

[0012] As a preferred embodiment, a first inclined surface is provided on the right side of the first row position, and the first inclined surface is inclined from top to bottom and to the left; a second inclined surface is provided on the left side of the second row position, and the second inclined surface is inclined from top to bottom and to the left. The inclination of the first inclined surface and the inclination of the second inclined surface are the same as the first direction and slide against each other; between the first inclined surface and the second inclined surface, one is provided with a first T-shaped groove, and the other is provided with a first T-shaped protrusion that is adapted to slide and connect with the first T-shaped groove.

[0013] As a preferred embodiment, the bottom of the first slide is provided with a second T-slot, which extends along a first direction; the top of the first ejector pin is provided with a second rod body that slides restricted by the second T-slot; the third slide is provided with a third limiting hole that extends vertically, and the second ejector pin can be inserted into the third limiting hole. The second ejector pin has a first limiting plate and a second limiting plate with vertical spacing; when the first ejector plate is in the mold closed state, the second limiting plate abuts against the bottom of the third limiting hole; when the first ejector plate moves up a first distance, the first limiting plate abuts against the top of the third limiting hole.

[0014] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution: By setting up a side slide that moves along a first direction, a first slide that moves along a second direction, a fixed second slide, and a third slide that moves along a third direction, during the ejection and unloading process of the door trim component, the side slide is first controlled to move to the right along the first direction to demold from the left extension plate. Then, the first top plate moves up a first distance and the first slide moves diagonally to the upper right along the second direction, so that the first slide demolds from the left end body, and the middle left body, middle right body, and right end body provide ejection force. Finally, the first top plate moves up a second distance and the first slide moves diagonally to the upper right along the second direction and the third slide moves upward along the third direction, so that the door trim component deforms and accumulates force to the top and rebounds, so that the middle right body, right end body, and right extension plate are demolded and the door trim component is unloaded. With this structure, the demolding operation of the door trim component can be completed without the use of an ejector pin structure, which can not only improve the production yield of the door trim component, but also simplify the overall structure of the injection mold.

[0015] The present invention also provides an injection molding method for automotive door decorative components, which is applied to the injection mold of the aforementioned automotive door decorative components.

[0016] As a preferred option, the injection molding method includes Step 1: Provide an injection molding machine, fix the lower mold base to the injection molding machine, fix the upper mold base to the ejector pin system of the injection molding machine, and use the ejector pin system to move the upper mold base down relative to the lower mold base to close the mold or move it up to open the mold. At the same time, the ejector pin system drives the first ejector plate to move. Step 2: The ejector system moves the upper mold base downward relative to the lower mold base, completing the mold closing between the upper and lower mold bases; Step 3: The injection molding machine injects the hot melt slurry from the injection port into the upward molding cavity through the extrusion system. After standing still for 30-90 seconds, it cools and solidifies to form the door decorative component. Step 4: The ejector system moves the upper mold base upward in conjunction with the ejector pin, causing the upper mold core to be demolded from the door trim component; at the same time, the side slide moves to the left along the first direction, causing the side slide to be demolded from the left extension plate of the door trim component. Step 5: The ejector system moves the first ejector plate up a first distance, and the first slide moves obliquely to the upper right along the second direction, so that the first slide is demolded from the left end body part; at the same time, the left end body part deforms upward, providing demolding ejection force for the middle left body part, the middle right body part and the right end body part; Step 6: The push rod system moves the first top plate up a second distance, and the first moving part moves diagonally to the upper right along the second direction and the third moving part moves upward along the third direction, so that the middle right body part, the right end body part and the right extension plate are demolded and the door decorative component is cut. Step 7: Repeat steps 2 to 6 to continue injection molding and unload the door decorative components.

[0017] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, by using the above injection molding scheme to injection mold and cut the car door decorative component, the deformation and force storage of the car door decorative component can be completed by simply controlling the first distance and the second distance of the first top plate. Finally, the deformation and force storage of the car door decorative component can be reached to the peak and rebound for self-demolding and material cutting without the need for ejector pins. This avoids the situation of product damage caused by ejector pins in the traditional technology and improves the production yield. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the injection mold for the automotive door decorative component provided in the embodiments of this application; Figure 2 yes Figure 1 A three-dimensional structural diagram of the lower mold base of the injection mold for the automotive door trim component is shown. Figure 3 yes Figure 1A three-dimensional structural diagram of the upper mold base of the injection mold for the automotive door trim component is shown. Figure 4 yes Figure 2 The diagram shows a three-dimensional structural representation of the side slide, first slide, second slide, and third slide of the lower mold base of the injection mold for the automotive door trim component. Figure 5 yes Figure 4 The cross-sectional view of the side slide, first slide, second slide and third slide of the lower mold base of the injection mold for the automotive door trim component is shown in the mold closing state. Figure 6 yes Figure 5 The diagram shows the lateral movement of the vehicle to the left along the first direction. Figure 7 yes Figure 6 The diagram shows the state where the first row moves diagonally upwards and to the right along the second direction. Figure 8 yes Figure 7 The diagram shows the state of the first row moving diagonally upward to the right along the second direction and the third row moving upward along the third direction. Figure 9 yes Figure 1 A three-dimensional structural diagram of the car door trim component produced by injection molding using an injection mold. Figure 10 yes Figure 9 The front view of the door trim component shown.

[0020] The following are the labeling elements in the figure: 10. Lower mold base; 11. Side slide; 111. First side molding part; 112. First guide hole; 12. First slide; 121. Second side molding part; 122. First molding part; 123. First inclined surface; 124. First T-slot; 125. Second T-slot; 13. Second slide; 131. Second molding part; 132. Third molding part; 133. Second inclined surface; 134. First T-shaped protrusion; 14. Third slide; 141. Fourth molding part; 142. Fifth molding part; 143. Third limiting hole; 15. First top plate; 151. First ejector rod; 1511. Second rod body; 152. Second ejector rod; 1521. First limiting plate; 1522. Second limiting plate; 16. Injection port; 20. Upper mold base; 21. Upper mold core; 211. Upper forming cavity; 22. First guide rod; 30. Door trim component; 31. Left side extension panel; 32. Left end body part; 33. Middle left side body part; 34. Middle right side body part; 35. Right end body part; 36. Right side extension panel; x1, first direction; z1, second direction; z2, third direction. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] Please refer to the following: Figures 1 to 10 The injection mold for the automotive door trim component provided in this application embodiment will now be described. The injection mold for the automotive door trim component includes a lower mold base 10 and an upper mold base 20.

[0027] The lower mold base 10 is provided with a side slide 11 that can move along the first direction x1, a first slide 12 that can move along the second direction z1, and a fixedly installed second slide 13. The first slide 12 moves in conjunction with the first top plate 15. The upper mold base 20 is provided with an upper mold core 21 at its bottom, and the upper mold core 21 has an upper forming cavity 211. When the upper mold base 20 and the lower mold base 10 are closed, the side slide 11, the first slide 12 and the second slide 13 can be injection molded with the upper forming cavity 211 to form a car door trim. Component 30; when the upper mold base 20 moves upward relative to the lower mold base 10 to open the mold, it can move the side slide 11 to the left along the first direction x1 to demold; when the first top plate 15 moves upward by a first distance, it can move the first slide 12 to the right and upward along the second direction z1 to demold and cause deformation at the left end of the door decorative component 30; when the first top plate 15 moves upward by a second distance, it can move a slide along the second direction z1 to the right and upward to demold the door decorative component 30 from the second slide 13.

[0028] With this structure, by setting a side slide 11 that moves along a first direction, a first slide 12 that moves along a second direction, a fixedly installed second slide 13, and a third slide 14 that moves along a third direction; during the ejection and unloading of the door trim component, firstly, the side slide 11 is controlled to move to the right along the first direction to demold from the left extension plate; then, the first top plate 15 moves upward by a first distance and the first slide 12 moves diagonally to the right and upward along the second direction, so that the first slide 12 is demolded from the left end body part, and the middle left body part, the middle right body part, and the right end... The main body provides ejection force; finally, the first ejector plate moves up a second distance and moves the first slide 12 diagonally to the upper right along the second direction and the third slide 14 moves upward along the third direction, so that the door trim component 30 deforms and stores force to the top and springs back, so that the middle right main body, the right end main body and the right extension plate are demolded and the door trim component 30 is unloaded; with this structure, the demolding operation of the door trim component 30 can be completed without the use of ejector pin structure, which can not only improve the production yield of the door trim component 30, but also simplify the overall structure of the injection mold.

[0029] Specifically, the upper mold base 20 is provided with a first guide rod 22 at the bottom, which is inclined from top to bottom and to the left; the side slide 11 is provided with a first guide hole 112 penetrating its upper and lower surfaces, which is inclined from top to bottom and to the left; the first guide rod 22 can be inserted into the first guide hole 112, and when the upper mold base 20 moves up and down relative to the lower mold base 10, the side slide 11 can move left and right along the first direction x1 through the cooperation of the first guide rod 22 and the first guide hole 112.

[0030] For example, the first direction is the direction in which the side slide 11 moves horizontally left and right; when the upper mold base 20 moves down relative to the lower mold base 10 to close the mold, the side slide 11 can move to the right along the first direction through the cooperation of the first guide rod 22 and the first guide hole 112; when the upper mold base 20 moves up relative to the lower mold base 10 to open the mold, the side slide 11 can move to the left along the first direction through the cooperation of the first guide rod 22 and the first guide hole 112.

[0031] More specifically, the side row 11 has a first side molding part 111 on the right side and a second side molding part 121 on the left side. The first side molding part 111 and the second side molding part 121 are used to injection mold the left extension plate 31 of the door decorative component 30. The first row 12 has a first molding part 122 on the top. The first molding part 122 is used to injection mold the left end body part 32 of the door decorative component 30. The first row 12 is movably installed on the left side of the second row 13. The third row 14 is provided on the right side of the second row 13 and can move along the third direction z2. The second row 13 has a second molding part 131 on the top left side, which is used to injection mold the middle left body part 33 of the door decorative component 30. The second row 13 has a third molding part 132 on the top right side, which is used to injection mold the middle right body part 34 of the door decorative component 30. The third row 14 has a fourth molding part 141 on the top, which is used to injection mold the right end body part 35 of the door decorative component 30. The third row 14 has a fifth molding part 142 on the right side, which is used to injection mold the right extension plate 36 of the door decorative component 30.

[0032] Understandably, after the upper mold base 20 and the lower mold base 10 are closed, the side slides 11, the first slide 12, the second slide 13, the third slide 14, and the upper molding cavity 211 form a molding chamber for injection molding the door trim component 30. After the door trim component 30 is formed, the upper mold base 20 moves upward relative to the lower mold base 10 to open the mold, allowing the upper molding cavity 211 to be demolded from the door trim component 30. During the mold opening process between the upper mold base 20 and the lower mold base 10, the side slides 11 can move to the left along the first direction to demold from the left extension plate 31. Furthermore, by moving the first top plate 15 upward by a first distance, the first slide 12 moves obliquely to the right and upward along the second direction, lifting the left end body upward and causing deformation. At the same time, the first slide 12 and the left end body are demolded due to deformation. During the upward deformation of the left end body, the middle left side can be gradually demolded. The main body is partially or completely demolded from the second molding part 131; then, the first top plate 15 moves up a second distance, and the first slide 12 moves diagonally to the right and upward along the second direction, and the left end of the main body is lifted up and deformed by the first slide 12; at the same time, the first top plate 15 moves up in conjunction with the third slide 14, and the right end of the main body 35 is lifted up and deformed by the third slide 14, which finally causes the middle right side of the main body to be demolded from the third molding part 132, and causes the deformation of the left and right ends of the door decorative component 30 to reach its peak and rebound, and the rebound force is used to demold the right end of the main body and the right side extension plate from the third slide 14 and unload the material.

[0033] This structure, by setting the first row 12, the second row 13, and the third row 14, utilizes the movement of the first row 12 and the third row 14 to complete the deformation and force accumulation of the door decorative component 30, and finally uses the rebound force to complete the demolding, eliminating the need for ejector pins, thereby improving the production yield of the product; furthermore, by cleverly controlling the displacement of the first row 12 and the third row 14, the deformation of the door decorative component 30 is effectively controlled to prevent breakage, thereby improving the reliability of demolding.

[0034] Preferably, the first top plate 15 is movably mounted on the lower mold base 10. The first top plate 15 is provided with a first ejector rod 151 for driving the first slide 12 to move and a second ejector rod 152 for driving the third slide 14 to move. When the first top plate 15 moves upward a first distance, the first slide 12 can be moved obliquely to the right and upward along the second direction z1 through the first ejector rod 151. When the first top plate 15 moves upward a second distance, the first slide 12 can be moved obliquely to the right and upward along the second direction z1 through the first ejector rod 151, while the second ejector rod 152 moves the third slide 14 upward along the third direction z2, so that the top of the first slide 12 is higher than the top of the third slide 14, and the top of the third slide 14 is higher than the top of the second slide 13. This structure is beneficial for controlling the deformation of the left and right body parts of the door trim component 30, thereby making the deformation of the door trim component 30 controllable and improving demolding efficiency, reliability and yield.

[0035] Furthermore, a first inclined surface 123 is provided on the right side of the first row 12, and the first inclined surface 123 is inclined from top to bottom and to the left; a second inclined surface 133 is provided on the left side of the second row 13, and the second inclined surface 133 is inclined from top to bottom and to the left. The inclination of the first inclined surface 123 and the inclination of the second inclined surface 133 are the same as the first direction x1 and slide against each other; between the first inclined surface 123 and the second inclined surface 133, one is provided with a first T-shaped groove 124, and the other is provided with a first T-shaped protrusion 134 that is adapted to slide and connect with the first T-shaped groove 124.

[0036] More specifically, the first slide 12 has a second T-slot 125 at its bottom, which extends along a first direction x1; the first ejector pin 151 has a second rod 1511 at its top, which slides restricted by the second T-slot 125; the third slide 14 has a third limiting hole 143 extending vertically, into which the second ejector pin 152 can be inserted. The second ejector pin 152 has a first limiting plate 1521 and a second limiting plate 1522 spaced vertically; when the first ejector plate 15 is in the mold-closed state, the second limiting plate 1522 abuts against the bottom of the third limiting hole 143; when the first ejector plate 15 moves upward a first distance, the first limiting plate 1521 abuts against the top of the third limiting hole 143. This structure, through purely mechanical control of the first slide 12 and the third slide 14 to achieve two-stage upward movement, not only simplifies the overall structure of the injection mold but also facilitates later maintenance, reducing manufacturing and maintenance costs, thereby synergistically reducing product production costs.

[0037] It should be noted that, since the first row 12 and the second row 13 can abut against each other through the first inclined surface 123 and the second inclined surface 133, and their movement is restricted by the cooperation of the first T-slot 124 and the first T-shaped protrusion 134, the movement of the first row 12 can be completed using only one first push rod 151. The third row 14, however, requires two second push rods 152 according to the left-right spacing, thus ensuring the reliability and stability of the movement of the third row 14. In other words, the movement of the first row 12 and the third row 14 can be completed with only one first push rod 151 and two second push rods 152, thereby eliminating the structural complexity associated with using ejector pins to push out products in traditional technologies.

[0038] Preferably, the upper mold base 20 is provided with a glue injection port 16, and a nozzle is installed on the glue injection port 16. The bottom of the nozzle extends downward and is connected to the upper molding cavity 211. When the upper mold base 20 and the lower mold base 10 are closed, the hot melt slurry can be injected from the glue injection port 16 through the extrusion system of the injection molding machine, and then injected into the upper molding cavity 211 through the nozzle. After cooling for a certain period of time, the car door decorative component 30 can be formed.

[0039] It should be noted that there are guide rods at one of the four corners and guide holes at the other four corners between the upper mold base 20 and the lower mold base 10. The guide rods are inserted into the guide holes to restrict the upper mold base 20 to move up and down relative to the lower mold base 10, thereby improving the reliability and accuracy of the mold closing between the upper mold base 20 and the lower mold base 10, which is conducive to improving the production yield of injection molds.

[0040] Furthermore, the injection mold for the automotive door decorative component provided in this application is a double-cavity injection mold with two cavities, and two door decorative components 30 can be injection molded in one mold closing. This structure can further improve production efficiency.

[0041] This application embodiment also provides an injection molding method for automotive door trim components, applied to the injection mold of the aforementioned automotive door trim components, the injection molding method including... Step 1: Provide an injection molding machine, fix the lower mold base 10 to the injection molding machine, fix the upper mold base 20 to the ejector pin system of the injection molding machine, and use the ejector pin system to move the upper mold base 20 relative to the lower mold base 10 to close the mold or move it upward to open the mold. At the same time, the ejector pin system drives the first ejector plate 15 to move. Step 2: The ejector system moves the upper mold base 20 downward relative to the lower mold base 10, completing the mold closing of the upper mold base 20 and the lower mold base 10; Step 3: The injection molding machine injects hot melt slurry from the injection port 16 into the upward molding cavity 211 through the extrusion system. After standing still for 30-90 seconds, it cools and solidifies to form the door decorative component 30. Step 4: The ejector system moves the upper mold base 20 upward, causing the upper mold core 21 to be demolded from the door decorative component 30; at the same time, the side slide 11 moves to the left along the first direction x1, causing the side slide 11 to be demolded from the left extension plate 31 of the door decorative component 30. Step 5: The ejector system moves the first ejector plate 15 upward by a first distance, and the first slide 12 moves obliquely to the upper right along the second direction z1, so that the first slide 12 is demolded from the left end body part 32; at the same time, the left end body part 32 deforms upward, providing demolding ejection force for the middle left body part 33, the middle right body part 34 and the right end body part 35. Step 6: The push rod system moves the first top plate 15 upward by a second distance, and the first sliding position 12 moves diagonally to the right and upward along the second direction z1 and the third sliding position 14 moves upward along the third direction z2, so that the middle right body part 34, the right end body part 35 and the right extension plate 36 are demolded and the door decorative component 30 is cut. Step 7: Repeat steps 2 to 6 to continue injection molding and unload the door decorative component 30.

[0042] By using the above injection molding scheme to injection mold and cut the car door decorative components, the deformation and force storage of the car door decorative components can be completed by simply controlling the first distance and the second distance of the first top plate. Finally, the deformation and force storage of the car door decorative components can be completed to the peak and spring back, so that the components can be automatically demolded and cut without the need for ejector pins. This avoids the situation of product damage caused by ejector pins in traditional technology and improves the production yield.

[0043] The above are merely preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and should not be construed as limiting the scope of protection of the present invention in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present invention.

Claims

1. An injection mold for an automotive door decorative component, characterized in that, include The lower mold base (10) has a side slide (11) that can move along a first direction (x1), a first slide (12) that can move along a second direction (z1), a fixed second slide (13), and a third slide (14) that can move along a third direction (z2) in sequence on its top. The first slide (12) is movably installed to the left of the second slide (13). The first slide (12) and the third slide (14) move in conjunction with the first top plate (15). The upper mold base (20) has an upper mold core (21) at the bottom, and the upper mold core (21) has an upper molding cavity (211). When the upper mold base (20) and the lower mold base (10) are closed, the side slide (11), the first slide (12), the second slide (13) and the third slide (14) can be injection molded with the upper molding cavity (211) to form the door decorative component (30). First, when the upper mold base (20) moves upward relative to the lower mold base (10) to open the mold, it can move the side slide (11) to the left along the first direction (x1) to demold; then when the first top plate (15) moves upward by a first distance, it can move the first slide (12) to the right and upward along the second direction (z1) to demold and cause the left end of the door decoration component (30) to deform; finally, when the first top plate (15) moves upward by a second distance, it can move the first slide (12) to the right and upward along the second direction (z1) and simultaneously move the third slide (14) to the third direction (z2) to deform and store force at both ends of the door decoration component (30) until the deformation and storage force reach the peak and spring back, so that it can be demolded automatically without ejector pins.

2. The injection mold for the automotive door decorative component according to claim 1, characterized in that, The bottom of the upper mold base (20) is provided with a first guide rod (22), which is inclined to the left from top to bottom; The side position (11) is provided with a first guide hole (112) that penetrates its upper and lower surfaces. The first guide hole (112) is inclined to the left from top to bottom. The first guide rod (22) can be inserted into the first guide hole (112). When the upper mold base (20) moves up and down relative to the lower mold base (10), it can move left and right along the first direction (x1) through the cooperation of the first guide rod (22) and the first guide hole (112).

3. The injection mold for the automotive door decorative component according to claim 1 or 2, characterized in that, The side position (11) is provided with a first side molding part (111) on the right side and a second side molding part (121) on the left side. The first side molding part (111) and the second side molding part (121) are used to injection mold the left extension plate (31) of the door decorative component (30). The first row (12) has a first molding part (122) at the top, and the first molding part (122) is used to injection mold the left end body part (32) of the door decorative component (30).

4. The injection mold for the automotive door decorative component according to claim 3, characterized in that, The second row (13) has a second molding part (131) on the top left side, which is used to injection mold the middle left body part (33) of the door decorative component (30). The second row (13) has a third molding part (132) on the top right side, which is used to injection mold the middle right body part (34) of the door decorative component (30). The third row (14) has a fourth molding part (141) at the top, which is used to injection mold the right end body part (35) of the door decorative component (30). The third row (14) has a fifth molding part (142) on the right side, which is used to injection mold the right side extension plate (36) of the door decorative component (30).

5. The injection mold for the automotive door decorative component according to claim 4, characterized in that, The first top plate (15) is movable up and down and installed on the lower mold base (10). The first top plate (15) is provided with a first push rod (151) for driving the first slide (12) to move and a second push rod (152) for driving the third slide (14) to move.

6. The injection mold for the automotive door decorative component according to claim 5, characterized in that, When the first top plate (15) moves up a first distance, it can move the first moving position (12) diagonally to the right and upward along the second direction (z1) through the linkage of the first top rod (151); When the first top plate (15) moves up a second distance, the first row (12) can be moved diagonally to the right and up along the second direction (z1) by the first top rod (151), and at the same time the second top rod (152) moves the third row (14) up along the third direction (z2), so that the top of the first row (12) is higher than the top of the third row (14), and the top of the third row (14) is higher than the top of the second row (13).

7. The injection mold for the automotive door decorative component according to claim 5 or 6, characterized in that, The first row (12) has a first inclined surface (123) on the right side, and the first inclined surface (123) is set from top to bottom and to the left. The second row (13) has a second inclined surface (133) on the left side. The second inclined surface (133) is inclined from top to bottom and to the left. The slope of the first inclined surface (123) and the slope of the second inclined surface (133) are the same as the first direction (x1) and slide against each other. Between the first inclined surface (123) and the second inclined surface (133), one is provided with a first T-shaped groove (124), and the other is provided with a first T-shaped protrusion (134) that is adapted to slide and connect with the first T-shaped groove (124).

8. The injection mold for the automotive door decorative component according to claim 7, characterized in that, The bottom of the first row position (12) is provided with a second T-shaped groove (125), which extends along the first direction (x1); the top of the first top rod (151) is provided with a second rod body (1511) that slides restricted by the second T-shaped groove (125); The third row (14) is provided with a third limiting hole (143) that extends vertically. The second ejector (152) can be inserted into the third limiting hole (143). The second ejector (152) has a first limiting plate (1521) and a second limiting plate (1522) with vertical spacing. When the first top plate (15) is in the mold closing state, the second limiting plate (1522) abuts against the bottom of the third limiting hole (143). When the first top plate (15) moves up a first distance, the first limiting plate (1521) abuts against the top of the third limiting hole (143).

9. A method for injection molding a decorative component for an automobile door, characterized in that, An injection mold applied to the automotive door trim component as described in any one of claims 1-8.

10. The injection molding method for automotive door decorative components according to claim 9, characterized in that, Injection molding methods include Step 1: Provide an injection molding machine, fix the lower mold base (10) to the injection molding machine, fix the upper mold base (20) to the ejector system of the injection molding machine, and use the ejector system to move the upper mold base (20) relative to the lower mold base (10) to move down to close the mold or move up to open the mold. At the same time, the ejector system drives the first top plate (15) to move. Step 2: The ejector system moves the upper mold base (20) downward relative to the lower mold base (10) to complete the mold closing of the upper mold base (20) and the lower mold base (10); Step 3: The injection molding machine injects the hot melt slurry from the injection port into the upper molding cavity (211) through the extrusion system. After standing still for 30-90 seconds, it cools and solidifies to form the door decorative component (30). Step 4: The push rod system moves the upper mold base (20) upward, so that the upper mold core (21) is demolded from the door decorative component (30); at the same time, the side slide (11) moves to the left along the first direction (x1), so that the side slide (11) is demolded from the left extension plate (31) of the door decorative component (30). Step 5: The ejector system moves the first ejector plate (15) upward by a first distance, and the first ejector plate (15) moves the first slide (12) diagonally to the upper right along the second direction (z1), so that the first slide (12) is demolded from the left body part (32); at the same time, the left body part (32) deforms upward, providing demolding ejection force for the middle left body part (33), the middle right body part (34) and the right body part (35); Step 6: The first top plate of the push rod system moves up a second distance, and the first sliding position (12) moves diagonally to the right and upward along the second direction (z1) and the third sliding position (14) moves upward along the third direction (z2) through the first top plate (15), so that the middle right body part (34), the right end body part (35) and the right extension plate (36) are demolded and the door decorative component (30) is cut. Step 7: Repeat steps 2 to 6 to continue injection molding and unload the door decorative component (30).

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