Injection mold for easy demoulding of car bumper

Abstract

The invention discloses an injection mold for facilitating demoulding of an automobile bumper, comprising an ejector plate, a movable mold and an inclined ejector block, wherein a plurality of ejector rods are arranged between the movable mold and the ejector plate; the inclined ejector block is located at one side below the movable mold, the upper end of the inclined ejector block is horizontally slidably connected to the movable mold, and the lower end of the inclined ejector block is connected to the ejector plate through an inclined guide column group; the injection mold also comprises an insert, which is arranged at the junction of the left end of the movable mold and the left end of the inclined ejector block, a first cavity is arranged at the bottom of the left end of the movable mold, the upper half of the insert is arranged in the first cavity and the insert is horizontally slidably connected to the first cavity, a second cavity is arranged at the top of the left end of the inclined ejector block, the lower half of the insert is arranged in the second cavity and is slidably connected to the second cavity; a locking structure is arranged between the insert and the inclined ejector block; the invention can facilitate the detachment of an undercut on the side wall of the automobile bumper from the fixed mold in the automobile injection mold, and can avoid damage to the undercut on the automobile bumper.

Description

Technical Field

[0001] The invention relates to the technical field of automobile bumper injection molds, and in particular to an injection mold which is convenient for automobile bumper demoulding. Background Art

[0002] The automobile bumper injection mold currently on the market includes an ejector plate, a movable mold and an inclined ejector block. A number of ejector rods are arranged between the movable mold and the ejector plate, the upper end of each ejector rod is fixed to the lower end of the movable mold, and the lower end of each ejector rod is fixed to the upper end of the ejector plate; the inclined ejector block is located on one side below the movable mold, the upper end of the inclined ejector block is horizontally slidably connected to the movable mold, and the lower end of the inclined ejector block is connected to the ejector plate through an inclined guide column group; after the injection mold is used to injection mold the automobile bumper product, when the injection mold is used to demold the injection molded automobile bumper, since the joint between the left end of the movable mold and the left end of the inclined ejector block does not have space for the side of the automobile bumper to deform and bend, it is easy for the undercut on the side of the automobile bumper to be difficult to separate from the fixed mold, which will bring inconvenience to the demolding of the automobile bumper, and in the process of demolding the automobile bumper, it is easy to pull the undercut on the side of the automobile bumper, which will cause damage to the automobile bumper. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides an injection mold that facilitates demoulding of an automobile bumper, which can facilitate the detachment of an undercut on the side wall of the automobile bumper from a fixed mold in the automobile injection mold and can avoid damage to the undercut on the automobile bumper.

[0004] The injection mold for facilitating demoulding of automobile bumpers of the present invention comprises an ejector plate, a movable mold and an inclined ejector block. A plurality of ejector rods are arranged between the movable mold and the ejector plate, the upper end of each ejector rod is fixed to the lower end of the movable mold, and the lower end of each ejector rod is fixed to the upper end of the ejector plate; the inclined ejector block is located on one side below the movable mold, the upper end of the inclined ejector block is horizontally slidably connected to the movable mold, and the lower end of the inclined ejector block is connected to the ejector plate through an inclined guide column group; the injection mold also comprises an insert, which is arranged at the junction of the left end of the movable mold and the left end of the inclined ejector block, a first cavity is arranged at the bottom of the left end of the movable mold, the upper half of the insert is arranged in the first cavity and the insert is horizontally slidably connected to the first cavity, and the left end of the inclined ejector block A second cavity is provided at the top of the end, and the lower half of the insert is provided in the second cavity and is slidably connected with the second cavity; a locking structure is provided between the insert and the inclined lift block; when the inclined lift block moves inwardly relative to the movable mold, the locking structure is used to lock the insert and the inclined lift block so that the inclined lift block drives the insert to move inwardly; when the inner end portion of the insert abuts against the inner end portion of the first cavity, the locking structure is used to unlock the insert and the inclined lift block so that the inclined lift block continues to move inwardly relative to the movable mold; when the inclined lift block moves outwardly relative to the movable mold and the inner end portion of the second cavity abuts against the inner end portion of the insert and pushes the insert to move outwardly, the locking structure is used to re-lock the insert and the inclined lift block.

[0005] After the automobile bumper is injection molded, the side wall of the automobile bumper located at the position of the insert can be deformed and bent inwardly when the automobile bumper is demolded, that is, the insert can avoid the side wall of the automobile bumper, so that the side wall of the automobile bumper can be deformed and bent inwardly during the demolding process, thereby facilitating the undercut located on the side wall of the automobile bumper to be separated from the fixed mold in the automobile injection mold, and avoiding damage to the undercut on the automobile bumper.

[0006] The present invention is an injection mold for facilitating demoulding of automobile bumpers, wherein the locking structure comprises a locking block, a through hole is vertically arranged on the inner end of the insert, the locking block is vertically slidably connected in the through hole, and the height of the locking block is greater than the height of the through hole; a first wedge-shaped groove is arranged on the top of the first cavity, a second wedge-shaped groove is arranged on the bottom of the second cavity, a first wedge-shaped portion adapted to the first wedge-shaped groove is arranged on the upper end of the locking block, and a second wedge-shaped portion adapted to the second wedge-shaped groove is arranged on the lower end of the locking block; when the second wedge-shaped portion is inserted into the second wedge-shaped groove and when the inclined top block is inwardly relative to the movable mold When the movable mold moves to the outside, the first wedge-shaped portion is disengaged from the first wedge-shaped groove and the first wedge-shaped portion slides into the first wedge-shaped groove to allow the inclined ejector block to continue to move inward relative to the movable mold after it is disengaged from the insert. When the inclined ejector block moves outward relative to the movable mold and the inner end of the second cavity abuts against the inner end of the insert and pushes the insert to move outward, the first wedge-shaped portion is disengaged from the first wedge-shaped groove and the second wedge-shaped portion slides into the second wedge-shaped groove to allow the locking block to re-engage the movable mold. The new locking insert and the inclined ejector block; after adopting this locking structure, when the second wedge-shaped portion is inserted into the second wedge-shaped groove and when the inclined ejector block moves inwardly relative to the movable mold, the locking block can lock the insert and the inclined ejector block so that the inclined ejector block drives the insert to move inwardly, at which time, the outer end of the insert can be separated from the inner wall of the side of the injection-molded automobile bumper; when the inner end of the insert abuts against the inner end of the first cavity, the second wedge-shaped portion is separated from the second wedge-shaped groove and the first wedge-shaped portion slides into the first wedge-shaped groove so that the inclined ejector block continues to move inwardly relative to the movable mold after being separated from the insert. The first wedge-shaped portion is disengaged from the first wedge-shaped groove and the second wedge-shaped portion slides into the second wedge-shaped groove so that the locking block re-locks the insert and the tilted lift block; at this time, the tilted lift block can push the insert to move outward and reset to prepare for injection molding of the next automobile bumper.

[0007] The injection mold of the present invention is convenient for demoulding the automobile bumper, wherein a sliding hole is provided in the middle of the insert, a sliding block is fixed on the inner top of the first cavity, the sliding block is inserted into the sliding hole, and the sliding hole is horizontally slidably connected to the sliding block; by adopting this structure, the insert can be reliably horizontally slidably connected to the inner top of the first cavity.

[0008] The injection mold for facilitating demoulding of automobile bumpers of the present invention has convex edges on both front and rear outer walls of the lower end of the slider, and sliding grooves on both front and rear walls of the lower end of the slide hole, and each convex edge is slidably connected to the sliding groove on the corresponding side. By adopting this structure, it is possible to avoid the situation where the insert is separated from the slider, that is, the reliability of the sliding connection between the insert and the slider can be improved.

[0009] The injection mold of the present invention is convenient for demoulding the automobile bumper, wherein the slider is fixed to the inner top of the first cavity by a plurality of bolts which are penetrated in the slider and threadedly connected to the movable mold; by adopting this structure, the slider can be reliably fixed to the inner top of the first cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0012] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention after removing some structures;

[0013] Figure 3 for Figure 2 The schematic diagram of the structure after the enlargement of A in the middle;

[0014] Figure 4 It is a schematic diagram of the first three-dimensional structure after the slider and the insert are connected;

[0015] Figure 5 This is a schematic diagram of the second three-dimensional structure after the slider is connected to the insert. DETAILED DESCRIPTION

[0016] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0017] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0018] like Figure 1-5 As shown, the injection mold for facilitating demoulding of automobile bumpers of the present invention comprises an ejector plate 1, a movable mold 2 and an inclined ejector block 3. A plurality of ejector rods 4 are arranged between the movable mold 2 and the ejector plate 1. The upper end of each ejector rod 4 is fixed to the lower end of the movable mold 2, and the lower end of each ejector rod 4 is fixed to the upper end of the ejector plate 1; the inclined ejector block 3 is located on one side below the movable mold 2, the upper end of the inclined ejector block 3 is horizontally slidably connected to the movable mold 2, and the lower end of the inclined ejector block 3 is connected to the ejector plate 1 through an inclined guide column group 5; the injection mold further comprises an insert 6, which is arranged at the junction of the left end of the movable mold 2 and the left end of the inclined ejector block 3, a first cavity 21 is arranged at the bottom of the left end of the movable mold 2, the upper half of the insert 6 is arranged in the first cavity 21 and the insert 6 is horizontally slidably connected to the first cavity 21, and the inclined ejector block A second cavity 31 is provided at the top of the left end of 3, and the lower half of the insert 6 is provided in the second cavity 31 and is slidably connected with the second cavity 31; a locking structure is provided between the insert 6 and the inclined ejector block 3; when the inclined ejector block 3 moves inwardly relative to the movable mold 2, the locking structure is used to lock the insert 6 and the inclined ejector block 3 so that the inclined ejector block 3 drives the insert 6 to move inwardly; when the inner end of the insert 6 abuts against the inner end of the first cavity 21, the locking structure is used to unlock the insert 6 and the inclined ejector block 3 so that the inclined ejector block 3 continues to move inwardly relative to the movable mold 2; when the inclined ejector block 3 moves outwardly relative to the movable mold 2 and abuts against the inner end of the insert 6 at the inner end of the second cavity 31 and pushes the insert 6 to move outward, the locking structure is used to re-lock the insert 6 and the inclined ejector block 3.

[0019] The locking structure includes a locking block 7, a through hole 61 is vertically arranged on the inner end of the insert 6, the locking block 7 is vertically slidably connected in the through hole 61, and the height of the locking block 7 is greater than the height of the through hole 61; a first wedge-shaped groove 22 is arranged on the top of the first cavity 21, a second wedge-shaped groove 32 is arranged on the bottom of the second cavity 31, a first wedge-shaped portion 71 adapted to the first wedge-shaped groove 22 is arranged on the upper end of the locking block 7, and a second wedge-shaped portion 72 adapted to the second wedge-shaped groove 32 is arranged on the lower end of the locking block 7; when the second wedge-shaped portion 72 is inserted into the second wedge-shaped groove 32 and when the inclined top block 3 is inwardly relative to the movable mold 2 When the inclined ejector block 3 moves to the side, the locking block 7 is used to lock the insert 6 and the inclined ejector block 3 so that the inclined ejector block 3 drives the insert 6 to move inward; when the inner end of the insert 6 abuts against the inner end of the first cavity 21, the second wedge-shaped portion 72 disengages from the second wedge-shaped groove 32 and the first wedge-shaped portion 71 slides into the first wedge-shaped groove 22 so that the inclined ejector block 3 disengages from the insert 6 and continues to move inward relative to the movable mold 2; when the inclined ejector block 3 moves outward relative to the movable mold 2 and the inner end of the second cavity 31 abuts against the inner end of the insert 6 and pushes the insert 6 to move outward, the first wedge-shaped portion 71 disengages from the first wedge-shaped groove 22 and the second The wedge-shaped portion 72 slides into the second wedge-shaped groove 32 so that the locking block 7 re-locks the insert 6 and the inclined lift block 3; by adopting this locking structure, when the second wedge-shaped portion is inserted into the second wedge-shaped groove and when the inclined lift block moves inward relative to the movable mold, the locking block can lock the insert and the inclined lift block so that the inclined lift block drives the insert to move inward, at this time, the outer end of the insert can be separated from the inner wall of the side of the injection-molded automobile bumper; when the inner end of the insert abuts against the inner end of the first cavity, the second wedge-shaped portion is separated from the second wedge-shaped groove and the first wedge-shaped portion slides into the first wedge-shaped groove to separate the inclined lift block After the insert is inserted, it continues to move inwardly relative to the movable mold; at this time, the inclined lift block can continue to move inwardly relative to the insert and the movable mold, so that the outer end of the inclined lift block can reliably separate from the inner wall of the side of the injection-molded automobile bumper; when the inclined lift block moves outwardly relative to the movable mold and abuts against the inner end of the insert at the inner end of the second cavity and pushes the insert to move outward, the first wedge-shaped portion separates from the first wedge-shaped groove and the second wedge-shaped portion slides into the second wedge-shaped groove so that the locking block re-locks the insert and the inclined lift block; at this time, the inclined lift block can push the insert to move outward and reset to prepare for injection molding of the next automobile bumper.

[0020] A sliding hole 62 is provided in the middle of the insert 6, and a slider 8 is fixed on the inner top of the first cavity 21. The slider 8 is inserted into the sliding hole 62, and the sliding hole 62 is horizontally slidably connected to the slider 8. By adopting this structure, the insert can be reliably connected to the inner top of the first cavity horizontally slidably.

[0021] The front and rear outer walls of the lower end of the slider 8 are both provided with convex edges 81, and the front and rear outer walls of the lower end of the sliding hole 62 are both provided with sliding grooves 63, and each convex edge 81 is slidably connected to the sliding groove 63 on the corresponding side; by adopting this structure, it is possible to avoid the situation where the insert is separated from the slider, that is, the reliability of the sliding connection between the insert and the slider can be improved.

[0022] The slider 8 is fixed to the inner top of the first cavity 21 by a plurality of bolts which are passed through the slider 8 and threadedly connected to the movable mold 2. By adopting this structure, the slider can be reliably fixed to the inner top of the first cavity.

[0023] After the automobile bumper product is injection molded, when the injection mold demoulds the injection molded automobile bumper, the ejector plate can move upward. At this time, the movable mold can push the injection molded automobile bumper to move upward under the action of the ejector rod to separate the automobile bumper from the fixed mold. At the same time, the inclined guide column group can push the inclined ejector block to move upward synchronously, and under the sliding cooperation of the inclined guide column group and the ejector plate, the inclined ejector block can slide horizontally inwardly relative to the movable mold (the sliding cooperation structure of the inclined guide column group and the ejector plate is the existing When the inclined ejector block moves inwardly relative to the movable mold, the locking structure can lock the insert and the inclined ejector block so that the inclined ejector block drives the insert to move inwardly. Since the insert can move inwardly, when the automobile bumper is demolded, the side wall of the automobile bumper located at the position of the insert can be deformed and bent inwardly, that is, the insert can avoid the side wall of the automobile bumper, so that the side wall of the automobile bumper can be deformed and bent inwardly during the demolding process, thereby facilitating the side wall of the automobile bumper to be located at the position of the insert. The undercut on the upper part is separated from the fixed mold in the automobile injection mold; in the above process, when the inner end of the insert is against the inner end of the first cavity, the locking structure can unlock the insert and the inclined ejector block so that the inclined ejector block continues to move inward relative to the movable mold, thereby facilitating the inclined ejector block to separate from the side wall of the automobile bumper; after the automobile bumper is demoulded, the ejector plate can move downward, at this time, the movable mold can move downward under the action of the ejector rod, and at the same time, the inclined ejector block can move downward under the action of the inclined guide column group, and under the sliding cooperation of the inclined guide column group and the ejector plate, the inclined ejector block can be horizontally slid outward relative to the movable mold and reset (the structure of the sliding cooperation of the inclined guide column group and the ejector plate is the prior art, so it is not repeated here), in the above-mentioned process of resetting the movable mold and the inclined ejector block, when the inclined ejector block moves outward relative to the movable mold and abuts against the inner end of the insert at the inner end of the second cavity and pushes the insert to move outward, the locking structure can re-lock the insert and the inclined ejector block, at this time, the inclined ejector block can push the insert to move outward and reset to prepare for injection molding of the next automobile bumper.

[0024] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An injection mold for facilitating demoulding of an automobile bumper, comprising an ejector plate (1), a movable mold (2) and an inclined ejector block (3), wherein a plurality of ejector rods (4) are arranged between the movable mold (2) and the ejector plate (1), wherein the upper end of each ejector rod (4) is fixed to the lower end of the movable mold (2), and the lower end of each ejector rod (4) is fixed to the upper end of the ejector plate (1); the inclined ejector block (3) is located on one side below the movable mold (2), the upper end of the inclined ejector block (3) is horizontally slidably connected to the movable mold (2), and the lower end of the inclined ejector block (3) is connected to the ejector plate (1) via an inclined guide column group (5); characterized in that: The injection mold further comprises an insert (6), wherein the insert (6) is arranged at the junction of the left end of the movable mold (2) and the left end of the inclined ejector block (3); a first cavity (21) is arranged at the bottom of the left end of the movable mold (2); an upper half of the insert (6) is arranged in the first cavity (21) and the insert (6) is horizontally slidably connected to the first cavity (21); a second cavity (31) is arranged at the top of the left end of the inclined ejector block (3); a lower half of the insert (6) is arranged in the second cavity (31) and is slidably connected to the second cavity (31); a locking structure is arranged between the insert (6) and the inclined ejector block (3); when the inclined ejector block (3) moves inwardly relative to the movable mold (2), the locking structure is used to lock the movable mold (2) and the inclined ejector block (3). The insert (6) and the inclined ejector block (3) are arranged so that the inclined ejector block (3) drives the insert (6) to move inward; when the inner end of the insert (6) abuts against the inner end of the first cavity (21), the locking structure is used to unlock the insert (6) and the inclined ejector block (3) so that the inclined ejector block (3) continues to move inward relative to the movable mold (2); when the inclined ejector block (3) moves outward relative to the movable mold (2) and the inner end of the second cavity (31) abuts against the inner end of the insert (6) and pushes the insert (6) to move outward, the locking structure is used to re-lock the insert (6) and the inclined ejector block (3); the locking structure comprises a locking block (7), the inner end of the insert (6) is vertically provided with a through hole (61), and the locking block (7) slides vertically The locking block (7) is connected to the through hole (61), and the height of the locking block (7) is greater than the height of the through hole (61); the top of the first cavity (21) is provided with a first wedge-shaped groove (22), the bottom of the second cavity (31) is provided with a second wedge-shaped groove (32), the upper end of the locking block (7) is provided with a first wedge-shaped portion (71) adapted to the first wedge-shaped groove (22), and the lower end of the locking block (7) is provided with a second wedge-shaped portion (72) adapted to the second wedge-shaped groove (32); when the second wedge-shaped portion (72) is inserted into the second wedge-shaped groove (32) and when the inclined ejector block (3) moves inward relative to the movable mold (2), the locking block (7) is used to lock the insert (6) and the inclined ejector block (3) so that the inclined ejector block (3) drives the insert (6) ) moves inward; when the inner end of the insert (6) abuts against the inner end of the first cavity (21), the second wedge-shaped portion (72) disengages from the second wedge-shaped groove (32) and the first wedge-shaped portion (71) slides into the first wedge-shaped groove (22) so that the inclined ejector block (3) disengages from the insert (6) and continues to move inward relative to the movable mold (2); when the inclined ejector block (3) moves outward relative to the movable mold (2) and the inner end of the second cavity (31) abuts against the inner end of the insert (6) and pushes the insert (6) to move outward, the first wedge-shaped portion (71) disengages from the first wedge-shaped groove (22) and the second wedge-shaped portion (72) slides into the second wedge-shaped groove (32) so that the locking block (7) re-locks the insert (6) and the inclined ejector block (3).

2. The injection mold for facilitating demoulding of automobile bumper according to claim 1, characterized in that: A sliding hole (62) is provided in the middle of the insert (6), a sliding block (8) is fixed on the inner top of the first cavity (21), the sliding block (8) is inserted into the sliding hole (62), and the sliding hole (62) is horizontally slidably connected to the sliding block (8).

3. The injection mold for facilitating demoulding of automobile bumper according to claim 2, characterized in that: The front and rear outer walls of the lower end of the slider (8) are both provided with convex edges (81), the front and rear outer walls of the lower end of the slide hole (62) are both provided with slide grooves (63), and each convex edge (81) is slidably connected to the slide groove (63) on the corresponding side.

4. The injection mold for facilitating demoulding of automobile bumper according to claim 2, characterized in that: The slider (8) is fixed to the inner top of the first cavity (21) via a plurality of bolts which are inserted into the slider (8) and threadedly connected to the movable mold (2).

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