Multi-group inclined core-pulling structure of large ejector block

Abstract

The invention belongs to the field of automobile injection molds, and particularly relates to a large ejector block multi-group inclined loose core structure which comprises an ejector block, a straight ejector rod, a plurality of inclined loose cores, a plurality of drag hooks, a plurality of limiting blocks and a plurality of springs, the top of the straight ejector rod is fixed to the ejector block, and the inclined loose cores, the limiting blocks and the springs are arranged in the ejector block; the inclined pulling core is obliquely arranged in the ejector block and slides in the ejector block in the obliquely-arranged direction, the inclined pulling core is in an inverted T shape, springs are fixed to the two sides of the upper face of the bottom of the inclined pulling core, the limiting block is fixed to the ejector block, the limiting block makes plane contact with one side face of the bottom of the inclined pulling core, and the drag hook makes buckle contact with the other side face of the bottom of the inclined pulling core. The inclined pulling core slides downwards in an inclined mode under the downward pushing action of the drag hook and the spring, and after the inclined pulling core slides, the limiting block and the lower portion of the bottom of the inclined pulling core are limited. The large ejector block is matched with the multiple sets of inclined core pulling assemblies, so that the large ejector block completes core pulling angle conversion in the ejection process, and core pulling of a screw hole is completed.

Description

Technical Field

[0001] The invention belongs to the field of automobile injection molds, and in particular relates to a large top block multi-group oblique core pulling structure. Background Art

[0002] For plastic mold products that have multiple large-angle undercuts in the mold opening direction, multiple sets of oil cylinder core pulling structures are currently commonly used. Figure 1 As shown in the figure, due to the limitation of the inner hole characteristics of the product and the high size requirements, the oil cylinder core pulling structure is generally adopted. However, this structure is affected by the injection force, the oil cylinder core pulling is not very stable, and the product is prone to flash and step difference. In addition, in order to draw two screw holes, the mold is designed with two oil cylinder core pulling, which is relatively costly. In the later production process, maintenance is also a considerable expense. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides a large ejector block with multiple groups of inclined core pulling structures, which cooperates with the large ejector block and multiple groups of inclined core pulling components so that the large ejector block can complete the core pulling angle conversion during the ejection process and complete the core pulling of the screw hole.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large top block with multiple groups of oblique core pulling structures, including a top block, a straight top rod, a plurality of oblique core pullings, a plurality of pull hooks, a plurality of limit blocks and a plurality of springs, the top of the straight top rod is fixed on the top block, the oblique core pulling, the limit block and the spring are arranged in the top block, the oblique core pulling is obliquely arranged in the top block and slides in the top block along the oblique setting direction, the oblique core pulling is in an inverted T shape, springs are fixed on both sides of the upper bottom of the oblique core pulling, the limit block is fixed on the top block, the limit block is in plane contact with one side surface of the bottom of the oblique core pulling, the pull hook is in snap contact with the other side surface of the bottom of the oblique core pulling, when the top block is pushed upward vertically, the oblique core pulling slides obliquely downward under the action of the pull hook and the spring pushing downward, and after the oblique core pulling slides, the limit block is limited by the bottom of the oblique core pulling.

[0005] Furthermore, a groove one matching with the inclined core and the spring is provided in the top block, the spring is compressed and arranged in the top block, and a groove two matching with the limit block is provided in the top block, and the groove two is located at the bottom side of the groove one.

[0006] Furthermore, a protrusion is provided at one end of the upper side of the bottom of the inclined core-pulling member, and the distance between the limit block and the protrusion is a, and a is 20 mm.

[0007] Furthermore, a notch is provided on one side of the bottom of the top block, a draw hook is fixed at the notch, a protrusion one is provided on the draw hook, a protrusion two is provided on the other side of the bottom end of the inclined core pulling, and the protrusion one is located above the protrusion two and is locked with the protrusion two.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention completes the core pulling angle conversion during the ejection process through the large ejector block, and the oblique core pulling moves obliquely along the undercut direction of the screw column under the simultaneous action of the hook and the spring force, and the core pulling of the screw hole is completed under the pulling of the hook and the subsequent drive of the spring, so as to realize the mold ejection with the ejector block and the need for core pulling with multiple sets of oil cylinders, and the mechanical form of this large ejector block does not have the problem of core pulling retreat, which solves the production stability and is more convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the prior art structure;

[0010] Figure 2 It is a schematic diagram of the structure of the present invention in conjunction with the product;

[0011] Figure 3 It is an exploded view of the present invention;

[0012] Figure 4 It is a schematic diagram of the structure of the oblique core pulling and the product, the draw hook and the limit block of the present invention;

[0013] Figure 5 This is a cross-sectional view of the top block and the product of the present invention;

[0014] Figure 6 for Figure 4 Enlarged view of point A in the middle;

[0015] Figure 7 It is a schematic diagram of the structure of the present invention when it is working;

[0016] Figure 8 It is a schematic diagram of the structure of the inclined core pulling after ejection of the product of the present invention, the product, the draw hook and the limit block;

[0017] Fig. 9 This is a cross-sectional view of the cooperation between the ejector block and the product after the product of the present invention is ejected;

[0018] Fig.10 for Figure 8 Enlarged view of point B in the middle;

[0019] Fig.11 for Figure 8 Enlarged view of center C. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 2-11 The present invention provides the following technical solutions: a large ejector block with multiple groups of inclined core pulling structures is used to eject a product 1 with multiple mounting holes or screw holes. Since the mounting holes or screw holes on the product 1 generally have a depth of more than 14 mm, the depth is deep, and the size requirements are high, the conventional oil cylinder core pulling structure is not very stable and will fall back. The product 1 is prone to flash and step difference, which affects the installation of the size holes of the product 1; and each screw hole on the product needs to be equipped with an oil cylinder core pulling, which is relatively costly. The present structure includes A top block 2, a straight top rod 3, a plurality of oblique core pulls 4, a plurality of draw hooks 5, a plurality of limit blocks 6 and a plurality of springs 7. The number of oblique core pulls 4, draw hooks 5 and limit blocks 6 is consistent with the number of mounting holes or screw holes. The top of the straight top rod 3 is fixed to the top block 2 by a locking block. Two straight top rods 3 can be designed. The straight top rod 3 is not connected to the oblique core pull 4. The oblique core pull 4, the limit blocks 6 and the springs 7 are arranged in the top block 2. The oblique core pull 4 is obliquely arranged in the top block 2 and slides in the top block 2 in the direction of the oblique arrangement. The mounting holes or screw holes on the product 1 The nail hole is also inserted into the top block 2 and connected to the top undercut of the oblique core pull 4. When the oblique core pull 4 slides, it moves obliquely along the undercut direction of the mounting hole or the screw hole. The oblique core pull 4 is in an inverted T shape. Springs 7 are fixed on both sides of the bottom of the oblique core pull 4. The limit block 6 is fixed on the top block 2. The limit block 6 is in contact with a plane of one side of the bottom of the oblique core pull 4, and the hook 5 is in contact with the buckle of the other side of the bottom of the oblique core pull 4. When the top block 2 is pushed vertically upward, the oblique core pull 4 slides obliquely downward under the action of the hook 5 and the spring 7 pushing downward. After the core puller 4 slides, the limit block 6 is limited by the bottom of the inclined core puller 4, and the inclined core puller 4 stops moving. At this time, the hook 5 is separated from the inclined core puller 4, and the inclined core puller 4 is also separated from the mounting hole or screw hole on the product 1, and the inclined core puller 4 will not retreat under the downward thrust of the spring 7, which can ensure that the mounting hole or screw hole has no step difference or burr, and has a more precise size; in addition, the mechanical coordination of the inclined core puller 4 with the limit block 6, the hook 5 and the spring 7 can not only save space and achieve ejection balance, but also save the cost of the mold and its subsequent expenses.

[0022] Specifically, a groove 21 adapted to the oblique core pull 4 and the spring 7 is provided in the top block 2, and the spring 7 is compressed and arranged in the top block 2. The spring 7 has an oblique downward thrust on the oblique core pull 4, and a groove 22 adapted to the limit block 6 is provided in the top block 2. The groove 22 is located on the bottom side of the groove 21. The limit block 4 is fixed in the groove 22 of the top block 2 by screws. The oblique core pull 4 and the spring 7 thereon are movably placed in the groove 21, and the top of the oblique core pull 4 is connected to the inside of the mounting hole or the screw hole with an inverted buckle.

[0023] Specifically, a protrusion 41 is provided at one end of the upper side of the bottom of the inclined core pulling 4. When installed in the mold, the distance between the limit block 6 and the protrusion 41 is a, a is 20 mm, and the inclined core pulling 4 can move obliquely 20 mm along the undercut direction of the mounting hole or the screw hole. At this time, the top of the inclined core pulling 4 is detached from the inside of the mounting hole or the screw hole.

[0024] Specifically, a notch 23 is provided on one side of the bottom of the top block 2, and the hook 5 is fixed at the notch 23 through the movable mold. A protrusion 51 is provided on the hook 5, and a protrusion 2 42 is provided on the other side of the bottom end of the inclined core pull 4. When installed in the mold, the protrusion 1 51 is located above the protrusion 2 42 and is locked with the protrusion 2 42. When the top block 2 moves vertically upward, the protrusion 1 51 is fixed to resist the upward movement of the inclined core pull 4.

[0025] The installation and movement process of the present invention is as follows: first fix the top block 2 through the locking block and the top of the straight push rod 3, then fix the two springs 7 on both sides of the bottom of the inclined core pull 4, then install the inclined core pull 4 equipped with the spring 7 in the groove 1 21, and fix the limit block 6 in the groove 2 22. At this time, the limit block 6 is in contact with a side plane of the bottom of the inclined core pull 4, and then fix the hook 5 on the movable mold with screws, and finally install the large top block into the mold from the front. At this time, the protrusion 51 on the hook 5 is snapped with the other side of the bottom end of the inclined core pull 4, and the assembly is completed. When the mold is ejected, the top block 2 moves vertically upward. Since the bottom end of the inclined core pull 4 is blocked by the hook 5 to prevent the inclined core pull 4 from moving upward, and the inclined core pull 4 is pushed downward by the spring 7, the inclined core pull 4 moves obliquely downward along the undercut direction of the screw column. At this time, the bottom of the top block 2 is separated from the bottom of the movable mold, and the inclined core pull 4 is also separated from the hook 5. Under the action of the spring 7, the inclined core pull 4 continues to move obliquely downward along the undercut direction of the screw column until the inclined core pull 4 is limited by the limit block 6, and the inclined core pull 4 stops moving. At this time, the oblique core pull 4 moves obliquely downward by 20 mm, and the top of the oblique core pull 4 is separated from the product 1, and exits the undercut in the product 1.

[0026] When there are multiple mounting holes or undercut screw holes inside the product 1, the present invention can solve the problem of complex molds and high size requirements for multiple mounting holes or screw holes in the product 1, avoid wasting the cost of mold production and manufacturing, and avoid expensive costs such as the cost of mold modification in the later stage.

[0027] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large top block with multiple groups of oblique core pulling structures, characterized in that: The invention comprises a top block (2), a straight top rod (3), a plurality of oblique core pulls (4), a plurality of draw hooks (5), a plurality of limit blocks (6) and a plurality of springs (7); the top of the straight top rod (3) is fixed on the top block (2); the oblique core pulls (4), the limit blocks (6) and the springs (7) are arranged in the top block (2); the oblique core pulls (4) are obliquely arranged in the top block (2) and slide in the top block (2) along the obliquely arranged direction; the oblique core pulls (4) are in an inverted T shape; the oblique core pulls (4) are Springs (7) are fixed on both sides of the bottom, the limit block (6) is fixed on the top block (2), the limit block (6) is in plane contact with one side surface of the bottom of the inclined core pull (4), and the draw hook (5) is in snap contact with the other side surface of the bottom of the inclined core pull (4). When the top block (2) is pushed upward vertically, the inclined core pull (4) slides obliquely downward under the action of the draw hook (5) and the spring (7) pushing downward, and after the inclined core pull (4) slides, the limit block (6) is limited below the bottom of the inclined core pull (4).

2. A large top block multi-group oblique core pulling structure according to claim 1, characterized in that: The top block (2) is provided with a groove 1 (21) adapted to the oblique core (4) and the spring (7); the spring (7) is compressed and arranged in the top block (2); the top block (2) is provided with a groove 2 (22) adapted to the limit block (6); the groove 2 (22) is located at the bottom side of the groove 1 (21).

3. A large top block multi-group oblique core pulling structure according to claim 2, characterized in that: A protrusion (41) is provided at one upper end of the bottom of the inclined core puller (4), and the distance between the limit block (6) and the protrusion (41) is a, and a is 20 mm.

4. A large top block multi-group oblique core pulling structure according to claim 3, characterized in that: A notch (23) is provided on one side of the bottom of the top block (2), the draw hook (5) is fixed at the notch (23), a protrusion (51) is provided on the draw hook (5), a protrusion (42) is provided on the other side of the bottom end of the inclined core (4), and the protrusion (51) is located above the protrusion (42) and is locked with the protrusion (42).

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