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

Abstract

The utility model belongs to the field of automobile injection molds, and particularly relates to a multi-group inclined core-pulling structure of a large ejector block, which comprises the ejector block, a straight ejector rod, a plurality of inclined pulling 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 on the ejector block, and the inclined pulling 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. According to the utility model, the large ejector block is matched with a plurality of groups 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 utility model belongs to the field of automobile injection mold, concretely relates to a big top piece multi-group inclined core-pulling structure. BACKGROUND

[0002] If there are multiple large-angle structure reverse buckles in the opening direction for the plastic mold product, currently, multi-group oil cylinder core-pulling structure is generally adopted. Figure 1 As shown in the figure, due to the limitation of the product inner hole feature and the higher size requirement, the oil cylinder core-pulling structure is generally adopted, but the structure is affected by the injection force, the oil cylinder core-pulling is not very stable, the product is prone to flash and step difference, and in order to pull out two screw holes, two oil cylinder core-pullings are designed in the mold, the cost is relatively high, and the maintenance in the later production process is also a considerable expense. UTILITY MODEL CONTENTS

[0003] In order to solve the above problems in the prior art, the utility model provides a big top piece multi-group inclined core-pulling structure, adopts the cooperation of the big top piece and the multi-group inclined core-pulling assembly, so that the big top piece completes the core-pulling angle conversion in the ejection process and completes the core-pulling of the screw hole.

[0004] In order to achieve the above object, the utility model provides the following technical scheme: a big top piece multi-group inclined core-pulling structure, comprising a top piece, a straight top rod, a plurality of inclined core-pullings, a plurality of hooks, a plurality of limit blocks and a plurality of springs, the straight top rod top is fixed on the top piece, the inclined core-pullings, the limit blocks and the springs are arranged in the top piece, the inclined core-pullings are arranged in the top piece and slide in the direction of the inclined arrangement in the top piece, the inclined core-pulling is inverted T-shaped, the inclined core-pulling bottom upper two sides are fixed with the springs, the limit block is fixed on the top piece, the limit block and the inclined core-pulling bottom one side plane are in contact, the hook and the other side of the inclined core-pulling bottom are in buckle contact, when the top piece is vertically upward, the inclined core-pulling slides downward under the action of the downward pushing of the hook and the spring, and the limit block limits the bottom of the inclined core-pulling after the sliding of the inclined core-pulling.

[0005] Further, the top piece is provided with a groove one matched with the inclined core-pulling and the spring, the spring is arranged in the top piece in compression, the top piece is provided with a groove two matched with the limit block, and the groove two is located at the bottom side of the groove one.

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

[0007] Further, the top piece bottom one side is provided with a notch, the hook is fixed at the notch, the hook is provided with a protrusion one, the other side of the inclined core-pulling bottom end is provided with a protrusion two, the protrusion one is located above the protrusion two and is buckled with the protrusion two.

[0008] Compared with the prior art, the utility model discloses the beneficial effect is: the utility model discloses the core angle conversion of being completed in the ejection process through big top piece, under the simultaneous action of the pull hook and spring force, the oblique core is along the screw column inverted direction and carries out the oblique movement, and then the core of screw hole is completed under the driving of the pull hook and the subsequent spring, so that the mould has the top piece ejection, and the difficult problem of not needing the core of multiple oil cylinder is realized, and the mechanical form of this big top piece does not exist the core retreat situation, solves the stability of production and is more convenient maintenance. BRIEF DESCRIPTION OF DRAWINGS

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

[0010] Figure 2 It is the structure schematic diagram of the utility model and product cooperation;

[0011] Figure 3 It is the utility model explosion map;

[0012] Figure 4 It is the structure schematic diagram of the utility model oblique core and product, pull hook and limit block;

[0013] Figure 5 It is the utility model top piece and product cooperation section view;

[0014] Figure 6 It is Figure 5 The enlarged view in A place;

[0015] Figure 7 It is the structure schematic diagram when the utility model works;

[0016] Figure 8 It is the structure schematic diagram of the utility model product after ejection oblique core and product, pull hook and limit block;

[0017] Figure 9 It is the utility model product after ejection top piece and product cooperation section view;

[0018] Figure 10 It is Figure 9 The enlarged view in B place;

[0019] Figure 11 It is Figure 9 The enlarged view in C place. DETAILED DESCRIPTION

[0020] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0021] Please refer to Figures 2-11 The present application provides the following technical scheme: a large top block multi-group inclined core-pulling structure is used for ejecting a product 1 with multiple mounting holes or screw holes. Since the depth of the mounting holes or screw holes on the product 1 generally reaches 14 mm or more, the depth is relatively deep, the size requirement is relatively high, the conventional oil cylinder core-pulling structure is not very stable, and the product 1 is prone to flash and step difference, which affects the installation of the size hole of the product 1. Moreover, each screw hole on the product needs to be equipped with an oil cylinder core-pulling structure, and the cost is relatively high. The structure comprises a top block 2, a straight top rod 3, a plurality of inclined core-pulling structures 4, a plurality of hooks 5, a plurality of limiting blocks 6 and a plurality of springs 7. The number of the inclined core-pulling structures 4, the hooks 5 and the limiting blocks 6 is consistent with the number of the mounting holes or screw holes. The straight top rod 3 is fixed on the top block 2 through a locking block at the top thereof. The straight top rod 3 can be designed as two rods. The straight top rod 3 is not connected with the inclined core-pulling structure 4. The inclined core-pulling structure 4, the limiting block 6 and the spring 7 are arranged in the top block 2. The inclined core-pulling structure 4 is arranged obliquely in the top block 2 and slides in the oblique direction in the top block 2. The mounting holes or screw holes on the product 1 are also inserted into the top block 2 and connected with the top of the inclined core-pulling structure 4. When the inclined core-pulling structure 4 slides, it moves obliquely along the direction of the mounting holes or screw holes. The inclined core-pulling structure 4 is in an inverted T shape. The spring 7 is fixed on the two sides of the bottom of the inclined core-pulling structure 4. The limiting block 6 is fixed on the top block 2. The limiting block 6 is in surface contact with one side of the bottom of the inclined core-pulling structure 4. The hook 5 is in buckle contact with the other side of the bottom of the inclined core-pulling structure 4. When the top block 2 is vertically upward, the inclined core-pulling structure 4 slides obliquely downward under the action of the downward pushing of the hook 5 and the spring 7. After the inclined core-pulling structure 4 slides, the limiting block 6 limits the bottom of the inclined core-pulling structure 4. The inclined core-pulling structure 4 stops moving. At this time, the hook 5 is separated from the inclined core-pulling structure 4. The inclined core-pulling structure 4 is also separated from the mounting holes or screw holes on the product 1. Moreover, the inclined core-pulling structure 4 will not retreat under the downward pushing force of the spring 7, which can ensure that the mounting holes or screw holes do not have step difference or flash and have relatively accurate size. In addition, the mechanical cooperation of the inclined core-pulling structure 4 with the limiting block 6, the hook 5 and the spring 7 can not only save space and balance ejection, but also save the cost of the mold and subsequent expenses.

[0022] Specific, top block 2 is provided with recess one 21 and inclined core 4 and spring 7 is adapted, spring 7 is compressed and arranged in top block 2, spring 7 has inclined downward thrust to inclined core 4, top block 2 is provided with recess two 22 and limiting block 6 is adapted, recess two 22 is located at the bottom side of recess one 21, limiting block 4 is fixed in recess two 22 of top block 2 by screw, inclined core 4 and spring 7 on it are movably placed in recess one 21, the top of inclined core 4 is connected with the inside reverse buckle of mounting hole or screw hole.

[0023] Specific, the upper side of the bottom of inclined core 4 is provided with protrusion 41, when being installed in the mold, the distance between limiting block 6 and protrusion 41 is a, a is 20mm, inclined core 4 can be inclinedly moved 20mm in the reverse buckle direction of mounting hole or screw hole, at this time, the top of inclined core 4 is separated from the inside reverse buckle of mounting hole or screw hole.

[0024] Specific, the bottom side of top block 2 is provided with notch 23, draw hook 5 is fixed at notch 23 by movable mold, draw hook 5 is provided with protrusion one 51, the other side of the bottom end of inclined core 4 is provided with protrusion two 42, when being installed in the mold, protrusion one 51 is located above protrusion two 42 and buckled with protrusion two 42, when top block 2 moves vertically upward, protrusion one 51 is fixed and does not move and resists the upward movement of inclined core 4.

[0025] The installation and movement process of the utility model is as follows: first, top block 2 is fixed by locking block and straight top rod 3 at the top, then two springs 7 are fixed on the upper two sides of the bottom of inclined core 4, then inclined core 4 with spring 7 is installed in recess one 21, limiting block 6 is fixed in recess two 22, at this time, limiting block 6 is in contact with the bottom side plane of inclined core 4, then draw hook 5 is fixed on movable mold by screw, finally, large top block is loaded into mold from the front, at this time, protrusion one 51 on draw hook 5 is buckled with the other side of the bottom end of inclined core 4, so that the assembly is completed. When the mold is ejected, top block 2 moves vertically upward, because the bottom end of inclined core 4 is buckled by draw hook 5 and prevented from moving upward, in addition, inclined core 4 is pushed downward by spring 7, so that inclined core 4 moves obliquely downward along the reverse buckle direction of screw column, at this time, the bottom of top block 2 is separated from the bottom of movable mold, inclined core 4 is also separated from draw hook 5, inclined core 4 continues to move obliquely downward along the reverse buckle direction of screw column under the action of spring 7 until inclined core 4 is limited by limiting block 6 and stops moving, at this time, inclined core 4 moves obliquely downward 20mm, the top of inclined core 4 is separated from product 1 and the reverse buckle in product 1 is exited.

[0026] When there are multiple mounting holes or screw hole reverse buckles in product 1, the utility model can solve the problems of complex mold and high size requirement of multiple mounting holes or screw holes of product 1, avoid the waste of production and manufacturing cost of mold and avoid the expensive cost of mold later rectification.

[0027] It should be pointed out finally that: the above is only the preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

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