High-precision injection molding mold for ejection demolding of inclined top in sliding block of back door of automobile

Abstract

The utility model provides a high-precision injection molding mold for ejection demolding of an inclined top in a sliding block of an automobile back door, and belongs to the technical field of molds. The die comprises a lower die plate, the lower die plate is provided with a frame forming cavity with an opening in one side, the section of the frame forming cavity is arc-shaped, the opening of the frame forming cavity faces outwards, the top of the frame forming cavity is provided with an outer edge part which is arranged outwards, the section of the outer edge part is a straight line, and the included angle between the outer edge part and the top of the frame forming cavity is an acute angle. And two inner core-pulling mechanisms connected with the inner side of the frame forming cavity are also symmetrically arranged on the lower template. The inner core pulling mechanism and the combined sliding block inclined core pulling mechanism can achieve automatic core pulling during mold opening, and the combined sliding block inclined core pulling mechanism can enable the outer edge forming block between the outer edge part and the frame forming cavity to move downwards in an inclined mode to be separated from the outer edge forming part during core pulling, so that the outer edge forming part can be prevented from being damaged.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a high-precision injection molding mold for ejecting and demolding a sliding block of a car rear door. Background Technology

[0002] The plastic parts of the car tailgate frame are generally injection molded. The plastic parts of the car tailgate frame have an outer edge structure. In the existing technology, the outer edge molding block at the outer edge structure is directly pulled out by the core pulling mechanism, which makes the outer edge of the door frame plastic parts easy to be damaged.

[0003] For example, a Chinese patent discloses a double-sloping top structure for an injection mold of a car rear door [application number: 201910382237.3], which includes a front template, a rear template, a seat plate, a top plate, a bottom plate, and a drive unit for driving the top plate to move. The top plate is located on one side of the rear template and is provided with an ejection assembly. The front template is provided with a front mold core for molding the inner surface structure of the inner plate, and the rear template is provided with a rear mold core for molding the outer surface structure of the inner plate. It also includes a first molding block for molding the inner side of the inner frame, a first sloping top assembly acting on the first molding block, a second molding block for molding the outer side of the inner frame, and a second sloping top assembly acting on the second molding block. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing a high-precision injection molding die for ejecting and demolding the inner inclined top of the sliding block of an automobile tailgate.

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

[0006] A high-precision injection molding mold for ejecting and demolding a sliding block in a car rear door includes a lower mold plate. The lower mold plate has a frame forming cavity with an opening on one side. The frame forming cavity has an arc-shaped cross-section and the opening faces outward. The top of the frame forming cavity has an outwardly facing outer edge. The cross-section of the outer edge is a straight line and the angle between the outer edge and the top of the frame forming cavity is an acute angle. The lower mold plate also has two symmetrically arranged inner core-pulling mechanisms connected to the inner side of the frame forming cavity, and a combined sliding block oblique core-pulling mechanism connected to the outer side of the frame forming cavity.

[0007] In the aforementioned high-precision injection molding mold for ejecting and demolding the sliding block of a car rear door, the combined sliding block oblique core-pulling mechanism includes a first outer sliding block and a second outer sliding block disposed at the top of the first outer sliding block. The inner ends of the first and second outer sliding blocks are combined to form a convex arc-shaped surface connected to the outer side of the frame molding cavity. The top of the second outer sliding block is provided with an outer edge molding block that is inserted between the outer edge and the frame molding cavity.

[0008] In the aforementioned high-precision injection molding mold for ejecting and demolding the inner inclined ejector of the car rear door slider, a linkage structure is provided between the second outer slider and the first outer slider. The lower template is also provided with an outer edge guide demolding structure connected to the second outer slider. The combined slider inclined core pulling mechanism also includes an outer core pulling drive structure connected to the first outer slider.

[0009] In the aforementioned high-precision injection molding mold for ejecting and demolding the sliding block of a car rear door, the external core-pulling drive structure includes a drive rod mounting seat fixed on the upper template. Two external drive rods are obliquely fixed on the drive rod mounting seat. Two external drive rod grooves corresponding to the external drive rods are obliquely provided on the first external slider. The external drive rods can be inserted into the external drive rod grooves.

[0010] In the aforementioned high-precision injection molding mold for ejecting and demolding the sliding block of a car rear door, the linkage structure includes two vertically arranged linkage rods inside the second outer slider. The top of the linkage rod is fixed to the second outer slider by a connecting block, and the bottom of the linkage rod passes through the second outer slider and is inserted into the first outer slider. The linkage rod and the first outer slider are slidably connected.

[0011] In the aforementioned high-precision injection molding mold for ejecting and demolding the inner inclined top of the car tailgate slider, the outer edge guiding demolding structure includes two guide blocks symmetrically arranged on both sides of the second outer slider. The inner side of the guide block is provided with a guide slide with a first guide groove and a second guide groove. The first guide groove and the second guide groove are connected. Guide rods inserted into the guide slide are provided on both sides of the second outer slider.

[0012] In the aforementioned high-precision injection molding die for ejecting and demolding the sliding block of a car tailgate, the inclination of the first guide groove is greater than that of the second guide groove.

[0013] In the aforementioned high-precision injection molding mold for ejecting and demolding the sliding block of a car rear door, the top of the first outer slider is recessed inward and has a trapezoidal cross-section limiting groove, while the bottom of the second outer slider is protruding and has a limiting slider with a trapezoidal cross-section that inserts into the limiting groove.

[0014] In the aforementioned high-precision injection molding mold for ejecting and demolding the inner inclined top of the car tailgate slider, the inner core pulling mechanism includes an inner slider, the inner end of which has a concave arc-shaped surface connected to the inner side of the frame molding cavity, and also includes an inner core pulling drive structure connected to the inner slider.

[0015] In the aforementioned high-precision injection molding mold for ejecting and demolding the inner inclined top of the car tailgate slider, the inner core pulling drive structure includes two inner drive rods that are inclinedly fixed on the upper template. The inner slider is provided with two inner drive rod grooves that correspond to the inner drive rods, and the inner drive rods can be inserted into the inner drive rod grooves.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. The internal core-pulling mechanism and the combined slider oblique core-pulling mechanism can achieve automatic core pulling when the mold is opened. The combined slider oblique core-pulling mechanism can make the outer edge forming block between the outer edge and the frame forming cavity move obliquely downward and separate from the outer edge forming part when pulling the core, thereby preventing damage to the outer edge forming part.

[0018] 2. The external core-pulling drive structure can drive the first external slider to move obliquely downward under the guidance of the limit plates on both sides. The oblique downward movement of the first external slider can drive the outer edge forming block to move through the linkage structure. The outer edge guiding demolding structure can guide the guide block so that the guide block can first move obliquely downward at a large angle to separate from the outer edge, and then move obliquely downward at a small angle to separate from the frame forming cavity, thereby preventing damage to the outer edge during core pulling.

[0019] 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

[0020] Figure 1 This is a structural diagram of the lower template;

[0021] Figure 2 This is a sectional view of the lower template;

[0022] Figure 3 This is a partial structural diagram of the lower template;

[0023] Figure 4 This is a partial structural diagram of a combined slider oblique core-pulling mechanism;

[0024] Figure 5 This is a schematic diagram of the guide block.

[0025] In the figure, 1 is the lower template, 2 is the frame forming cavity, 3 is the outer edge, 4 is the inner core pulling mechanism, 5 is the combined slider oblique core pulling mechanism, 6 is the first outer slider, 7 is the second outer slider, 8 is the outer edge forming block, 9 is the linkage structure, 10 is the outer edge guide demolding structure, 11 is the drive rod mounting seat, 12 is the outer drive rod groove, 13 is the linkage rod, 14 is the connecting block, 15 is the guide block, 16 is the first guide groove, 17 is the second guide groove, 18 is the guide slide, 19 is the guide rod, 20 is the limiting slider, 21 is the inner slider, 22 is the concave arc surface, 23 is the inner drive rod groove, and 24 is the convex arc surface. Detailed Implementation

[0026] like Figures 1-5 As shown, a high-precision injection molding mold for ejecting and demolding a sliding block of a car rear door includes a lower template 1. The lower template 1 is provided with a frame forming cavity 2 with an opening on one side. The cross-section of the frame forming cavity 2 is arc-shaped and the opening faces outward. The top of the frame forming cavity 2 has an outwardly facing outer edge 3. The cross-section of the outer edge 3 is a straight line and the angle between the outer edge 3 and the top of the frame forming cavity 2 is an acute angle. The lower template 1 is also symmetrically provided with two inner core pulling mechanisms 4 connected to the inner side of the frame forming cavity 2. The lower template 1 is also symmetrically provided with a combined sliding block inclined core pulling mechanism 5 connected to the outer side of the frame forming cavity 2.

[0027] In this invention, the inner core-pulling mechanism and the combined slider oblique core-pulling mechanism can achieve automatic core pulling when the mold is opened. When pulling the core, the combined slider oblique core-pulling mechanism can make the outer edge forming block between the outer edge and the frame forming cavity move obliquely downward and separate from the outer edge forming part, thereby preventing damage to the outer edge forming part.

[0028] Specifically, the combined slider oblique core-pulling mechanism 5 includes a first outer slider 6 and a second outer slider 7 disposed at the top of the first outer slider 6. The inner ends of the first outer slider 6 and the second outer slider 7 are combined to form a convex arc surface 24 connected to the outer side of the frame forming cavity 2. The top of the second outer slider 7 is provided with an outer edge forming block 8 that is inserted between the outer edge 3 and the frame forming cavity 2. Limiting plates are also provided on both sides of the first outer slider. A linkage structure 9 is provided between the second outer slider 7 and the first outer slider 6. The lower template 1 is also provided with an outer edge guiding demolding structure 10 connected to the second outer slider 7. The combined slider oblique core-pulling mechanism 5 also includes an outer core-pulling drive structure connected to the first outer slider 6. The external core-pulling drive structure can drive the first external slider to move obliquely downward under the guidance of the limit plates on both sides. The oblique downward movement of the first external slider can drive the outer edge forming block 8 to move through the linkage structure 9. The outer edge guiding demolding structure can guide the guide block so that the guide block can first move obliquely downward at a large angle to separate from the outer edge, and then move obliquely downward at a small angle to separate from the frame forming cavity, thereby preventing damage to the outer edge during core pulling.

[0029] Specifically, the external core-pulling drive structure includes a drive rod mounting base 11 fixed on the upper template. Two external drive rods are obliquely fixed on the drive rod mounting base 11. The first external slider 6 is obliquely provided with two external drive rod grooves 12 corresponding to the external drive rods. The external drive rods can be inserted into the external drive rod grooves 12. When the upper template moves upward, it can drive the external drive rods to move vertically upward. The obliquely provided external drive rods, in conjunction with the external drive rod grooves, can drive the first external slider to move away from the frame forming cavity.

[0030] Specifically, the linkage structure 9 includes two vertically arranged linkage rods 13 inside the second outer slider 7. The top ends of the linkage rods 13 are fixed to the second outer slider 7 via connecting blocks 14, and the bottom ends of the linkage rods 13 penetrate the second outer slider 7 and insert into the first outer slider 6. The linkage rods 13 and the first outer slider 6 are slidably connected. When the first outer slider moves away from the frame forming cavity, it can drive the second outer slider to move via the linkage rods.

[0031] Specifically, the outer edge guide demolding structure 10 includes two guide blocks 15 symmetrically arranged on both sides of the second outer slider 7. The inner side of the guide block 15 is provided with a guide slide 18 having a first guide groove 16 and a second guide groove 17. The first guide groove 16 and the second guide groove 17 are connected. The two sides of the second outer slider 7 are provided with guide rods 19 inserted into the guide slide 18. The inclination of the first guide groove 16 is greater than the inclination of the second guide groove 17.

[0032] When the second outer slider initially moves, the guide rod slides in the first guide groove. Under the action of the first guide groove, the second outer slider can move downward at a large angle, causing the outer edge forming block to move below the outer edge. After the guide rod moves into the second guide groove, the second outer slider continues to move. Under the action of the second guide groove and the guide rod, the second outer slider can move downward at a small angle and disengage from the frame forming cavity.

[0033] Specifically, the top of the first outer slider 6 is recessed inward and has a trapezoidal cross-section limiting groove, while the bottom of the second outer slider 7 is protruding and has a limiting slider 20 with a trapezoidal cross-section that inserts into the limiting groove. The limiting groove and the limiting slider together can limit the movement of the second outer slider.

[0034] Specifically, the inner core-pulling mechanism 4 includes an inner slider 21, the inner end of which has a concave arc-shaped surface 22 connected to the inner side of the frame forming cavity 2. It also includes an inner core-pulling drive structure connected to the inner slider 21, comprising two inner drive rods obliquely fixed to the upper template. The inner slider 21 has two obliquely arranged inner drive rod grooves 23 corresponding to the inner drive rods, allowing the inner drive rods to be inserted into the inner drive rod grooves 23. During mold opening, the upper template moves upward, causing the obliquely arranged inner drive rods to move vertically upward. This vertical upward movement of the inner drive rods, in conjunction with the inner drive rod grooves, causes the inner slider to move inward, thereby disengaging the concave arc-shaped surface 22 from the frame forming cavity.

[0035] The working principle of this utility model is as follows: the inner core pulling mechanism and the combined slider oblique core pulling mechanism can realize automatic core pulling when the mold is opened. When pulling the core, the combined slider oblique core pulling mechanism can make the outer edge forming block between the outer edge and the frame forming cavity move obliquely downward and separate from the outer edge forming part, thereby preventing damage to the outer edge forming part.

[0036] The external core-pulling drive structure drives the first external slider to move obliquely downward under the guidance of the limit plates on both sides. The oblique downward movement of the first external slider can drive the outer edge forming block 8 to move through the linkage structure 9. The outer edge guiding demolding structure can guide the guide block, so that the guide block can first move obliquely downward at a large angle to disengage from the outer edge, and then move obliquely downward at a small angle to disengage from the frame forming cavity, thereby preventing damage to the outer edge during core pulling. When the upper template moves upward, it can drive the external drive rod to move vertically upward. The inclined external drive rod, in conjunction with the external drive rod slide groove, can drive the first external slider to move away from the outer edge. When the frame forming cavity moves, the first outer slider moves away from the frame forming cavity, which can drive the second outer slider to move through the linkage rod. When the second outer slider initially moves, the guide rod slides in the first guide groove. Under the action of the first guide groove, the second outer slider can move downward at a large angle, so that the outer edge forming block moves to the lower part of the outer edge. When the guide rod moves into the second guide groove, the second outer slider continues to move. Under the action of the second guide groove and the guide rod, the second outer slider can move downward at a small angle and disengage from the frame forming cavity. The limiting slide groove, together with the limiting slider, can limit the second outer slider.

[0037] When the mold is opened, the upper template moves upward, which drives the inclined inner drive rod to move vertically upward. The vertical upward movement of the inner drive rod, in conjunction with the inner drive rod groove, drives the inner slider to move inward, thereby enabling the concave arc surface 22 to separate from the frame forming cavity.

[0038] 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.

[0039] Although this article frequently uses terms such as lower template 1, frame forming cavity 2, outer edge 3, inner core pulling mechanism 4, combined slider oblique core pulling mechanism 5, first outer slider 6, second outer slider 7, outer edge forming block 8, linkage structure 9, outer edge guide demolding structure 10, drive rod mounting seat 11, outer drive rod groove 12, linkage rod 13, connecting block 14, guide block 15, first guide groove 16, second guide groove 17, guide slide 18, guide rod 19, limiting slider 20, inner slider 21, concave arc surface 22, inner drive rod groove 23, convex arc surface 24, etc., these terms are used 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 high-precision injection molding mold for a rear door slide block of a car, the mold comprising a lower mold plate (1), characterized in that, The lower mold plate (1) is provided with a single-sided frame forming cavity (2) with an opening, the cross section of the frame forming cavity (2) is arc-shaped and the opening faces outward, the top of the frame forming cavity (2) is provided with an outwardly arranged outer edge portion (3), the cross section of the outer edge portion (3) is a straight line and the included angle between the outer edge portion (3) and the top of the frame forming cavity (2) is an acute angle, the lower mold plate (1) is also symmetrically provided with two inner core pulling mechanisms (4) connected to the inner side of the frame forming cavity (2), and the lower mold plate (1) is also symmetrically provided with a combined slider inclined core pulling mechanism (5) connected to the outer side of the frame forming cavity (2).

2. The high-precision injection molding mold for the automobile back door slide block inner inclined top ejection demolding according to claim 1, characterized in that, The combined slider inclined core pulling mechanism (5) comprises a first outer slider (6) and a second outer slider (7) arranged at the top end of the first outer slider (6), the inner ends of the first outer slider (6) and the second outer slider (7) are combined to form a convex arc-shaped surface (24) connected to the outer side of the frame forming cavity (2), and the top of the second outer slider (7) is provided with an outer edge forming block (8) inserted between the outer edge portion (3) and the frame forming cavity (2).

3. The high-precision injection molding mold for the automobile back door slide block inner inclined top ejection demolding according to claim 2, characterized in that, A linkage structure (9) is arranged between the second outer slider (7) and the first outer slider (6), the lower mold plate (1) is also provided with an outer edge guide demolding structure (10) connected to the second outer slider (7), and the combined slider inclined core pulling mechanism (5) further comprises an outer core pulling driving structure connected to the first outer slider (6).

4. The high-precision injection molding mold for the automobile back door slide block inner inclined top ejection demolding according to claim 3, characterized in that, The outer core pulling driving structure comprises a driving rod mounting seat (11) fixed on the upper mold plate, two outer driving rods are fixedly arranged on the driving rod mounting seat (11) in an inclined manner, two outer driving rod sliding grooves (12) corresponding to the outer driving rods are arranged on the first outer slider (6) in an inclined manner, and the outer driving rods can be inserted into the outer driving rod sliding grooves (12).

5. The high-precision injection molding mold for the automobile back door slide block inner inclined top ejection demolding according to claim 4, characterized in that, The linkage structure (9) comprises two linkage rods (13) vertically arranged in the second outer slider (7), the top end of each linkage rod (13) is fixed to the second outer slider (7) through a connecting block (14), the bottom of each linkage rod (13) penetrates the second outer slider (7) and is inserted into the first outer slider (6), and the linkage rod (13) and the first outer slider (6) are in sliding connection.

6. The high-precision injection molding mold for the automobile back door slide block inner inclined top ejection demolding according to claim 5, characterized in that, The outer edge guide demolding structure (10) comprises two guide blocks (15) symmetrically arranged on the two sides of the second outer slider (7), the inner side of each guide block (15) is provided with a guide sliding channel (18) with a first guide groove (16) and a second guide groove (17), the first guide groove (16) and the second guide groove (17) are communicatively arranged, and the two sides of the second outer slider (7) are provided with guide rods (19) inserted into the guide sliding channel (18).

7. The high-precision injection molding mold for the automobile back door slide block inner inclined top ejection demolding according to claim 6, characterized in that, The inclination of the first guide groove (16) is greater than that of the second guide groove (17).

8. The high-precision injection molding mold for the automobile back door slide block inner inclined top ejection demolding according to claim 3, characterized in that, The top of the first outer slider (6) is inwardly recessed to form a limiting sliding groove with a trapezoidal cross section, and the bottom of the second outer slider (7) is outwardly protruded to form a limiting sliding block (20) with a trapezoidal cross section inserted into the limiting sliding groove.

9. The high-precision injection molding mold for the automobile back door slide block inner inclined top ejection demolding according to claim 1, characterized in that, The inner core-pulling mechanism (4) comprises an inner sliding block (21), the inner end of the inner sliding block (21) is provided with a concave arc surface (22) connected with the inner side surface of the frame forming cavity (2), and further comprises an inner core-pulling driving structure connected with the inner sliding block (21).

10. The high-precision injection molding mold for the automobile back door slide block inner inclined top ejection demolding according to claim 9, characterized in that, The inner core-pulling driving structure comprises two inner driving rods obliquely fixed on the upper die plate, two inner driving rod sliding grooves (23) corresponding to the inner driving rods are obliquely arranged on the inner sliding block (21), and the inner driving rods can be inserted into the inner driving rod sliding grooves (23).

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