Delayed ejection mechanism for automobile door panel thick-wall plastic part mold

Abstract

The utility model provides a kind of automobile door panel thick wall plastic part mould delayed ejection mechanism, belong to mould technical field.It includes lower mould plate, the lower mould plate is protrudingly provided with forming insert block, the inner recess of the rear side of the forming insert block is exhaust side, the left side and the front side of forming insert block are glue side, the outer edge of the glue side is provided with several combined insert block glue structure.First delayed ejection assembly and second delayed ejection assembly can be pre-processed air top demoulding, make product weak position and lower mould plate separate, then cooperate with first ejector plate and carry out ejection action, realize delayed ejection, for door handle installation groove and loudspeaker mesh hole and other key parts Precision exert ejection force;Forming insert block and combined insert block glue structure optimize glue path, detachable forming block design is convenient for adaptation different specifications plastic part, this design solves the problem of thinner position damage caused by traditional ejection mode, improves the stability of ejection process and plastic part integrity.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a delayed ejection mechanism for a thick-walled plastic mold for automotive door panels. Background Technology

[0002] In existing technologies, thick-walled plastic parts for automotive door handles, due to their unique structure, require ejection from the mold cavity via an ejection mechanism after injection molding. However, traditional ejection mechanisms often employ a single rigid ejection method, making it impossible to precisely control the ejection force and timing for different parts of the plastic part. Since door handle plastic parts have multiple thin-walled transition areas, such as the edges of the speaker grille and the corners of the mounting groove, these thinner areas are prone to cracking and deformation during ejection due to concentrated stress and improper ejection timing. Furthermore, the disconnect between the traditional ejection mechanism and the glue injection system design, coupled with uneven melt filling leading to internal stress, further exacerbates the risk of breakage during ejection. This not only affects the appearance and structural strength of the plastic part but also increases scrap rates and production and maintenance costs.

[0003] For example, a Chinese patent discloses a zero-discontinuity ejector mechanism for an injection mold of an automotive door panel trim part [Application No.: 201922280087.3], including a fixed mold plate and a fixed template, a moving mold plate, a runner frame and a runner plate, as well as a base plate, mold feet and a moving template. An injection-molded product is located between the moving template and the fixed template. The product has concave-convex assembly parts, boundary undercuts, fixing post holes and positioning post holes. Corresponding concave-convex assembly ejector blocks, boundary ejector blocks and undercut ejector blocks are provided on the moving template. The concave-convex assembly... The top block mates with the concave-convex assembly, the boundary top block mates with the outer edge of the boundary undercut, the undercut top block mates with the outer edge of the boundary undercut, a small top block is set in the concave-convex assembly top block, the small top block mates with the outer periphery of the fixed column hole, the column hole core rod is installed in the concave-convex assembly top block, the core rod mates with the inner wall of the fixed column hole, the push tube is connected to the lower top plate, the ejector pin is connected to the bottom plate, the ejector pin passes through the push tube and mates with the inner wall of the positioning column hole, and the concave-convex assembly top block surrounds the outer periphery of the positioning column hole. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing a delayed ejection mechanism for thick-walled plastic parts molds for automotive door panels.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A delayed ejection mechanism for a thick-walled plastic part mold for an automotive door panel includes a lower template. A molding insert protrudes from the lower template. The recessed portion on the rear side of the molding insert is the venting side. The left, right, and front sides of the molding insert are the injection sides. The outer edge of the injection side is provided with a plurality of combined insert injection structures. A door panel handle mounting groove molding block is detachably provided on the molding insert. A first delayed ejection component is provided on the side of the door panel handle mounting groove molding block away from the venting side. A horn mesh molding block is also provided on the molding insert. A second delayed ejection component is provided around the horn mesh molding block. Both the first and second delayed ejection components are connected to a first ejection plate provided on the lower side of the lower template.

[0007] In the aforementioned delayed ejection mechanism for thick-walled plastic parts molded for automotive door panels, the first delayed ejection assembly includes three first inclined ejector blocks disposed on the front side of the molding insert. The bottom of the first inclined ejector blocks is connected to the first ejection plate via a first air ejector rod. The first air ejector rod has a first air inlet channel. The first inclined ejector block is provided with a first air ejector flow channel connected to the first air inlet channel. The air outlet of the first air ejector flow channel is disposed on the side of the first inclined ejector block. The bottom of the first air ejector rod is connected to a first air connector.

[0008] In the aforementioned delayed ejection mechanism for thick-walled plastic parts molded for automotive door panels, the second delayed ejection assembly includes several second inclined ejector blocks arranged circumferentially around the periphery of the horn-shaped mesh forming block. The bottom of the second inclined ejector blocks is connected to the first ejection plate via a second air ejector rod. The second air ejector rod has a second air inlet channel. The second inclined ejector block is provided with a second air ejector flow channel connected to the second air inlet channel. The air outlet of the second air ejector flow channel is located on the side of the second inclined ejector block. The bottom of the second air ejector rod is connected to a second air connector.

[0009] In the aforementioned delayed ejection mechanism for thick-walled plastic parts molds for automotive door panels, a molding block mounting plate is provided directly below the horn mesh forming block. The horn mesh forming block is fixed to the molding block mounting plate by several connecting rods. The molding block mounting plate is fixed to the bottom of the lower template. A second ejection plate is provided on the upper side of the molding block mounting plate, and an auxiliary ejection component is provided on the second ejection plate.

[0010] In the aforementioned delayed ejection mechanism for thick-walled plastic parts molded automotive door panels, the second ejector plate is connected to the first ejector plate via several first straight ejector rods, and the bottom of each first straight ejector rod vertically penetrates the molding block mounting plate and is slidably connected to the molding block mounting plate.

[0011] In the aforementioned delayed ejection mechanism for thick-walled plastic parts molded automotive door panels, the auxiliary ejection assembly includes fine ejector pins densely distributed in the middle of the second ejection plate. The bottom of the fine ejector pins is fixed on the second ejection plate and the top of the pins is inserted into the horn mesh forming block. It also includes several auxiliary straight ejector blocks arranged circumferentially around the horn mesh forming block. The inner end of the auxiliary straight ejector block abuts against the side of the horn mesh forming block, and the bottom of the auxiliary straight ejector block is connected to the second ejection plate through a second straight ejector rod.

[0012] In the aforementioned delayed ejection mechanism for thick-walled plastic parts molded automotive door panels, the combined insert injection structure includes an inwardly recessed injection channel on the lower template. An insert assembly is provided between the inner end of the injection channel and the molding insert. The insert assembly is detachably mounted on the lower template, and a tunnel channel connecting the injection channel and the molding insert is provided within the insert assembly.

[0013] In the aforementioned delayed ejection mechanism for thick-walled plastic parts molded automotive door panels, the inlet and outlet of the tunnel flow channel are both located on the top surface of the insert assembly, and the outlet is located at the bottom of the inlet side wall of the molding insert.

[0014] The diameter of the tunnel flow channel gradually decreases from the glue inlet to the glue outlet.

[0015] In the aforementioned delayed ejection mechanism for thick-walled plastic parts molds for automotive door panels, the insert assembly includes two mating injection blocks. Both injection blocks are fixed to the lower template by bolts. The tunnel flow channel is formed on the sidewalls of the two injection blocks on opposite sides. Corresponding rectangular positioning blocks and rectangular positioning grooves are also provided on the opposite sides of the two injection blocks.

[0016] In the aforementioned delayed ejection mechanism for thick-walled plastic parts molds for automotive door panels, two residual material ejector rods with their bottom ends connected to the first ejector plate are provided at the bottom of the glue inlet channel.

[0017] Compared with existing technologies, the advantages of this utility model are:

[0018] 1. The first and second delayed ejection components can pre-eject air ejection, separating the weak parts of the product from the lower mold plate. Then, they cooperate with the first ejection plate to perform the ejection action, achieving delayed ejection. The ejection force is precisely applied to key parts such as the door panel handle mounting groove and the speaker mesh. The injection structure of the molding insert and the combined insert optimizes the injection path. The detachable molding block design makes it easy to adapt to plastic parts of different specifications. This design solves the problem of damage to thinner parts caused by traditional ejection methods and improves the stability of the ejection process and the integrity of the plastic parts.

[0019] 2. The first delayed ejection assembly uses three first inclined ejector blocks in conjunction with a first air ejector rod. The plastic part is detached through the first air ejector channel and the air outlet on the side of the inclined ejector block. The air-assisted ejection method can control the force. This structure solves the problem that traditional rigid ejection is prone to damaging plastic parts, making the door panel handle mounting groove area evenly stressed and avoiding cracking of thin parts.

[0020] 3. The second delayed ejection assembly, through the cooperation of several circumferentially distributed second inclined ejector blocks and second air ejector rods, forms the side air outlets of the second air ejector channels within the multiple second inclined ejector blocks surrounding the horn mesh forming block. This design can assist in the detachment of the plastic part, enhance the detachment effect of the plastic part, and prevent damage. This design ensures that the thin area around the horn mesh is subjected to balanced force, solves the problem of damage caused by excessive local ejection force, and improves the ejection quality of complex structural parts.

[0021] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the lower template;

[0023] Figure 2 This is a structural diagram of the lower side of the template;

[0024] Figure 3 This is a partial structural schematic diagram of the present invention;

[0025] Figure 4 yes Figure 1 Enlarged view of point A in the middle;

[0026] Figure 5 This is a schematic diagram of the glue injection block. Detailed Implementation

[0027] like Figures 1-5 As shown, a delayed ejection mechanism for a thick-walled plastic part mold for an automotive door panel includes a lower template 1. A molding insert 2 protrudes from the lower template 1. The recessed portion on the rear side of the molding insert 2 is a venting side 3. The left, right, and front sides of the molding insert 2 are glue-injecting sides 4. Several combined insert glue-injecting structures 5 are provided on the outer edge of the glue-injecting side 4. A door panel handle mounting groove molding block 6 is detachably provided on the molding insert 2. A first delayed ejection component 7 is provided on the side of the door panel handle mounting groove molding block 6 away from the venting side 3. A horn mesh molding block 8 is also provided on the molding insert 2. A second delayed ejection component 9 is provided around the horn mesh molding block 8. Both the first delayed ejection component 7 and the second delayed ejection component 9 are connected to a first ejection plate 10 provided on the lower side of the lower template 1.

[0028] In this invention, the first delayed ejection assembly and the second delayed ejection assembly can pre-perform air ejection to separate the weak parts of the product from the lower mold plate, and then cooperate with the first ejection plate to perform the ejection action, achieving delayed ejection. The ejection force is precisely applied to key parts such as the door panel handle mounting groove and the speaker mesh. The injection path of the molding insert and the combined insert is optimized, and the detachable molding block design is easy to adapt to plastic parts of different specifications. This design solves the problem of damage to thinner parts caused by traditional ejection methods, and improves the stability of the ejection process and the integrity of the plastic parts.

[0029] Specifically, the first delayed ejection assembly 7 includes three first inclined ejector blocks 11 disposed on the front side of the molding insert 2. The bottom of each first inclined ejector block 11 is connected to the first ejection plate 10 via a first air ejector rod 12. The first air ejector rod 12 has a first air inlet channel, and the first inclined ejector block 11 is provided with a first air ejector channel 13 connected to the first air inlet channel. The air outlet of the first air ejector channel 13 is located on the side of the first inclined ejector block 11, and the bottom of the first air ejector rod 12 is connected to a first air connector 14. The first delayed ejection assembly uses three first inclined ejector blocks in conjunction with the first air ejector rod. The first air ejector channel and the air outlet on the side of the inclined ejector block assist in the separation of the plastic part. The air-assisted ejection method can control the force. This structure solves the problem of easy damage to the plastic part by traditional rigid ejection, makes the door panel handle mounting groove area evenly stressed, and avoids cracking of thin parts.

[0030] Specifically, the second delayed ejection assembly 9 includes several second inclined ejector blocks 15 arranged circumferentially around the periphery of the horn-shaped mesh forming block 8. The bottom of each second inclined ejector block 15 is connected to the first ejection plate 10 via a second air ejector rod 16. The second air ejector rod 16 has a second air inlet channel, and the second inclined ejector block 15 has a second air ejector channel 17 connected to the second air inlet channel. The air outlet of the second air ejector channel 17 is located on the side of the second inclined ejector block 15. The bottom of the second air ejector rod 16 is connected to a second air connector 18. The second delayed ejection assembly, through the cooperation of several circumferentially distributed second inclined ejector blocks and second air ejector rods, forms the side air outlets of the second air ejector channels within the multiple second inclined ejector blocks surrounding the horn-shaped mesh forming block. This design can assist in the detachment of the plastic part, enhance the detachment effect, and prevent damage. This design ensures balanced force on the thin area around the horn-shaped mesh periphery, solving the problem of breakage caused by excessive local ejection force and improving the ejection quality of complex structural parts.

[0031] Specifically, a molding block mounting plate 19 is disposed directly below the horn-shaped mesh molding block 8. The horn-shaped mesh molding block 8 is fixed to the molding block mounting plate 19 by several connecting rods. The molding block mounting plate 19 is fixed to the bottom of the lower template 1. A second ejection plate 20 is disposed on the upper side of the molding block mounting plate 19, and an auxiliary ejection component is disposed on the second ejection plate 20. The horn-shaped mesh molding block is fixed to the molding block mounting plate by connecting rods. Together with the second ejection plate and the auxiliary ejection component, a double-layer ejection structure is formed. The auxiliary ejection component and the second delayed ejection component work together to enhance the ejection support of the horn-shaped mesh area. This design solves the problem of insufficient support for complex mesh structures by a single ejection method and avoids deformation of the plastic part during ejection.

[0032] Specifically, the second ejector plate 20 is connected to the first ejector plate 10 via several first straight ejector rods 21. The bottom of each first straight ejector rod 21 vertically penetrates the molding block mounting plate 19 and is slidably connected to it. The second ejector plate is connected to the first ejector plate via the first straight ejector rods. The straight ejector rods penetrate the molding block mounting plate to achieve sliding guidance, ensuring synchronous movement of the double-layer ejection structure. This design improves the stability of the ejection process, avoids interference between the auxiliary ejection component and the delayed ejection component, and makes the force on the horn mesh area more uniform.

[0033] Specifically, the auxiliary ejection assembly includes fine ejector pins 22 densely distributed in the middle of the second ejection plate 20. The bottom of the fine ejector pins 22 is fixed to the second ejection plate 20 and the top of the pins is inserted into the horn mesh forming block 8. It also includes several auxiliary straight ejector blocks 23 arranged circumferentially around the horn mesh forming block 8. The inner end of the auxiliary straight ejector block 23 abuts against the side of the horn mesh forming block 8, and the bottom of the auxiliary straight ejector block 23 is connected to the second ejection plate 20 through a second straight ejector rod 24. The auxiliary ejection assembly uses a combination of densely distributed fine ejector pins and peripheral auxiliary straight ejector blocks. The fine ejector pins penetrate deep into the horn mesh forming block to provide multi-point support, and the auxiliary straight ejector blocks enhance the ejection force from the outside. This design solves the problem of difficult ejection of the fine structure of the horn mesh, allowing the mesh edge to detach from the central area simultaneously, reducing deformation and damage.

[0034] Specifically, the combined insert injection structure 5 includes an inwardly recessed injection channel 25 on the lower mold plate 1. An insert assembly 26 is disposed between the inner end of the injection channel 25 and the molding insert 2. The insert assembly 26 is detachably mounted on the lower mold plate 1, and a tunnel channel 27 connecting the injection channel 25 and the molding insert 2 is disposed within the insert assembly 26. The combined insert injection structure is connected to the tunnel channel within the insert assembly via the injection channel. The detachable insert assembly facilitates channel cleaning and maintenance. The tunnel channel optimizes the molten adhesive filling path, allowing the melt to flow uniformly within the thick-walled plastic part. This design solves the problem of uneven filling caused by traditional injection methods, improves the molding quality of the plastic part, and reduces breakage caused by internal stress during ejection.

[0035] Specifically, the inlet 28 and outlet 29 of the tunnel flow channel 27 are both located on the top surface of the insert assembly 26, and the outlet 29 is located at the bottom of the inlet side wall 4 of the molding insert 2; the diameter of the tunnel flow channel 27 gradually decreases from the inlet 28 to the outlet 29. The design, with both the inlet and outlet of the tunnel flow channel located on the top surface of the insert assembly and the outlet at the bottom of the inlet side wall of the molding insert, and with the flow channel diameter gradually decreasing, allows the molten adhesive to fill the cavity at a suitable speed and pressure, avoiding air bubbles and insufficient adhesive, while also reducing inlet marks. This solves the problem of insufficient filling pressure caused by traditional flow channel designs, improves the density of the plastic part, and facilitates subsequent ejection. The outlet 29's location at the bottom of the inlet side wall 4 of the molding insert 2 reduces the impact of the outlet on the surface quality of the product.

[0036] Specifically, the insert assembly 26 includes two mating injection blocks 30, both of which are bolted to the lower template 1. The tunnel flow channel 27 is formed on the sidewalls of the two injection blocks 30 on opposite sides. Corresponding rectangular positioning blocks 32 and rectangular positioning grooves are also provided on the opposite sides of the two injection blocks 30. The insert assembly uses two mating injection blocks, fixed with bolts to form a tunnel flow channel. The rectangular positioning blocks and positioning grooves ensure fitting accuracy. This design facilitates flow channel processing and maintenance, allowing for quick replacement of injection blocks with different flow channel specifications to adapt to different plastic parts. It solves the problem of difficult modification of traditional integral insert flow channels, improving mold versatility and maintenance efficiency.

[0037] Preferably, the bottom of the runner 25 is provided with two ejector pins 31, the bottom ends of which are connected to the first ejector plate 10. These ejector pins at the bottom of the runner are connected to the first ejector plate, allowing for the simultaneous ejection of the solidified material within the runner. This design avoids solidified material residue affecting subsequent injection molding, while simultaneously separating the solidified material from the molded part, reducing the number of ejection steps. It solves the problem of difficult cleaning of residual material in traditional runners, improving production continuity and mold lifespan.

[0038] The working principle of this utility model is as follows: the first delayed ejection component and the second delayed ejection component can perform air ejection demolding in advance, so that the weak parts of the product are separated from the lower mold plate, and then cooperate with the first ejection plate to perform the ejection action to achieve delayed ejection. The ejection force is precisely applied to key parts such as the door panel handle mounting groove and the speaker mesh. The injection structure of the molding insert and the combined insert optimizes the injection path. The detachable molding block design makes it easy to adapt to plastic parts of different specifications. This design solves the problem of damage to thinner parts caused by traditional ejection methods and improves the stability of the ejection process and the integrity of the plastic parts.

[0039] The first delayed ejection assembly uses three first inclined ejector blocks in conjunction with a first air ejector rod. The first air ejector channel and the side air outlet of the inclined ejector block assist the plastic part in detaching. The air-assisted ejection method can control the force. This structure solves the problem of easy damage to plastic parts by traditional rigid ejection. It makes the force evenly distributed in the door panel handle mounting groove area and avoids cracking in thin parts. The second delayed ejection assembly uses several circumferentially distributed second inclined ejector blocks in conjunction with the second air ejector rod. The side air outlet of the second air ejector channel in the multiple second inclined ejector blocks surrounding the horn mesh forming block can achieve the purpose of assisting the plastic part in detaching. The design enhances the plastic part detachment effect and prevents damage. This design makes the force evenly distributed in the thin area around the horn mesh, solves the problem of damage caused by excessive local ejection force, and improves the ejection quality of complex structural parts.

[0040] The horn-shaped mesh forming block is fixed to the forming block mounting plate by a connecting rod. Together with the second ejection plate and the auxiliary ejection assembly, it forms a double-layer ejection structure. The auxiliary ejection assembly and the second delayed ejection assembly work together to enhance the ejection support of the horn-shaped mesh area. This design solves the problem of insufficient support for complex mesh structures by a single ejection method and avoids deformation of the plastic part during ejection. The second ejection plate is connected to the first ejection plate by a first straight ejector rod. The straight ejector rod passes through the forming block mounting plate to achieve sliding guidance and ensure synchronous movement of the double-layer ejection structure. This design improves the stability of the ejection process, avoids interference between the auxiliary ejection assembly and the delayed ejection assembly, and makes the force on the horn-shaped mesh area more uniform. The auxiliary ejection assembly adopts a combination of densely distributed fine ejector pins and peripheral auxiliary straight ejector blocks. The fine ejector pins penetrate deep into the horn-shaped mesh forming block to provide multi-point support, and the auxiliary straight ejector blocks enhance the ejection force from the outside. This design solves the problem of difficult ejection of the fine structure of the horn-shaped mesh, allowing the mesh edge to detach from the center area synchronously, reducing deformation and damage.

[0041] The combined insert injection structure connects to the tunnel flow channel within the insert assembly via an injection channel. The detachable insert assembly facilitates channel cleaning and maintenance. The tunnel flow channel optimizes the molten adhesive filling path, ensuring uniform melt flow within the thick-walled plastic part. This design solves the problem of uneven filling caused by traditional injection methods, improves the molding quality of the plastic part, and reduces breakage due to internal stress during ejection. Both the injection and exit ports of the tunnel flow channel are located on the top surface of the insert assembly, with the exit port located at the bottom of the injection side wall of the molding insert. The flow channel diameter gradually decreases, allowing the molten adhesive to fill the cavity at an appropriate speed and pressure, avoiding air bubbles and insufficient adhesive. Simultaneously, it reduces the gate mark, solves the problem of insufficient filling pressure caused by traditional runner design, improves the density of plastic parts, and facilitates subsequent ejection. The gate 29 is set at the bottom of the gate side 4 of the molding insert 2, which can reduce the impact of the gate on the surface quality of the product. The insert assembly uses two fitting gate blocks, which are fixed by bolts to form a tunnel runner. The rectangular positioning block and positioning groove ensure fitting accuracy. This design facilitates runner processing and maintenance, and allows for quick replacement of gate blocks of different runner specifications to adapt to different plastic parts. It solves the problem of difficult modification of traditional integral insert runners and improves mold versatility and maintenance efficiency.

[0042] 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.

Claims

1. A delayed ejection mechanism for a thick-walled plastic part mold for an automobile door panel, comprising a lower template (1), characterized in that, The lower template (1) is provided with a protruding molding insert (2). The concave part on the rear side of the molding insert (2) is the venting side (3). The left, right and front sides of the molding insert (2) are the glue inlet side (4). The outer edge of the glue inlet side (4) is provided with a number of combined insert glue inlet structures (5). The molding insert (2) is provided with a door handle mounting groove molding block (6). The door handle mounting groove molding block (6) is provided with a first delayed ejection component (7) on the side away from the venting side (3). The molding insert (2) is also provided with a horn mesh molding block (8). The horn mesh molding block (8) is provided with a second delayed ejection component (9) around its periphery. The first delayed ejection component (7) and the second delayed ejection component (9) are both connected to the first ejection plate (10) provided on the lower side of the lower template (1).

2. The delayed ejection mechanism for thick-walled plastic parts molds for automotive door panels according to claim 1, characterized in that, The first delayed ejection assembly (7) includes three first inclined ejector blocks (11) arranged in front of the molding insert (2). The bottom of the first inclined ejector block (11) is connected to the first ejection plate (10) through a first air ejector rod (12). The first air ejector rod (12) has a first air inlet channel. The first inclined ejector block (11) is provided with a first air ejector channel (13) connected to the first air inlet channel. The air outlet of the first air ejector channel (13) is located on the side of the first inclined ejector block (11). The bottom of the first air ejector rod (12) is connected to a first air connector (14).

3. The delayed ejection mechanism for thick-walled plastic parts molds for automotive door panels according to claim 1, characterized in that, The second delayed ejection assembly (9) includes several second inclined ejector blocks (15) arranged circumferentially around the periphery of the horn mesh forming block (8). The bottom of the second inclined ejector block (15) is connected to the first ejection plate (10) through a second air ejector rod (16). The second air ejector rod (16) has a second air inlet channel. The second inclined ejector block (15) is provided with a second air ejector channel (17) connected to the second air inlet channel. The air outlet of the second air ejector channel (17) is located on the side of the second inclined ejector block (15). The bottom of the second air ejector rod (16) is connected to a second air connector (18).

4. The delayed ejection mechanism for thick-walled plastic parts molds for automotive door panels according to claim 3, characterized in that, A molding block mounting plate (19) is provided directly below the speaker mesh molding block (8). The speaker mesh molding block (8) is fixed to the molding block mounting plate (19) by several connecting rods. The molding block mounting plate (19) is fixed to the bottom of the lower template (1). A second ejector plate (20) is provided on the upper side of the molding block mounting plate (19). An auxiliary ejector assembly is provided on the second ejector plate (20).

5. The delayed ejection mechanism for thick-walled plastic parts molds for automotive door panels according to claim 4, characterized in that, The second ejector plate (20) is connected to the first ejector plate (10) by a number of first straight ejector rods (21). The bottom of the first straight ejector rod (21) vertically penetrates the molding block mounting plate (19) and is slidably connected to the molding block mounting plate (19).

6. The delayed ejection mechanism for thick-walled plastic parts molds for automotive door panels according to claim 5, characterized in that, The auxiliary ejection assembly includes fine ejector pins (22) densely distributed in the middle of the second ejection plate (20). The bottom of the fine ejector pins (22) is fixed on the second ejection plate (20) and the top is inserted into the horn mesh forming block (8). It also includes a number of auxiliary straight ejector blocks (23) arranged circumferentially around the horn mesh forming block (8). The inner end of the auxiliary straight ejector block (23) abuts against the side of the horn mesh forming block (8), and the bottom of the auxiliary straight ejector block (23) is connected to the second ejection plate (20) through the second straight ejector rod (24).

7. The delayed ejection mechanism for thick-walled plastic parts molds for automotive door panels according to claim 1, characterized in that, The combined insert glue inlet structure (5) includes an inwardly recessed glue inlet channel (25) on the lower template (1), and an insert assembly (26) is provided between the inner end of the glue inlet channel (25) and the molding insert (2). The insert assembly (26) is detachably provided on the lower template (1), and a tunnel channel (27) connecting the glue inlet channel (25) and the molding insert (2) is provided inside the insert assembly (26).

8. The delayed ejection mechanism for thick-walled plastic parts molds for automotive door panels according to claim 7, characterized in that, The inlet (28) and outlet (29) of the tunnel flow channel (27) are both located on the top surface of the insert assembly (26), and the outlet (29) is located at the bottom of the side wall of the inlet side (4) of the molded insert (2). The diameter of the tunnel flow channel (27) gradually decreases from the glue inlet (28) to the glue outlet (29).

9. The delayed ejection mechanism for thick-walled plastic parts molds for automotive door panels according to claim 8, characterized in that, The insert assembly (26) includes two mating glue-injecting blocks (30), both glue-injecting blocks (30) are fixed to the lower template (1) by bolts, the tunnel flow channel (27) is formed on the side wall of the two glue-injecting blocks (30) on opposite sides, and the two glue-injecting blocks (30) are also provided with corresponding rectangular positioning blocks (32) and rectangular positioning grooves on opposite sides respectively.

10. The delayed ejection mechanism for thick-walled plastic parts molds for automotive door panels according to claim 9, characterized in that, The bottom of the glue inlet channel (25) is provided with two residual material push rods (31) whose bottom ends are connected to the first ejector plate (10).

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