Large ejector block pitched roof composite core-pulling structure

Abstract

The utility model belongs to the field of automobile injection molds, and particularly relates to a large ejector block inclined ejector composite core-pulling structure which comprises an ejector block, a plurality of straight ejector rods, a plurality of core-pulling inclined ejector rods and a plurality of sliding seats, the tops of the straight ejector rods are fixed on the ejector block, and the upper portions of the core-pulling inclined ejector rods are movably arranged in the ejector block in an inclined downward mode. The bottom of the core-pulling angle ejector rod is vertically fixed with the middle of the sliding seat, the sliding seat is fixed on the mold, the middle of the sliding seat is movable, and when the ejector block is vertically ejected upwards, the core-pulling angle ejector rod is pushed by the ejector block to linearly move obliquely upwards along the middle of the sliding seat. According to the utility model, the large ejector block is matched with the plurality of core-pulling inclined ejector rod components, 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] This utility model belongs to the field of automotive injection molds, specifically relating to a large ejector block inclined ejector composite core-pulling structure. Background Technology

[0002] For plastic mold products with multiple large-angle undercuts in the mold opening direction, a multi-cylinder core-pulling structure is commonly used. For example... Figure 1 As shown, due to the limitations of the product's inner hole characteristics and the high dimensional requirements, a hydraulic cylinder core-pulling structure is generally adopted. However, this structure is affected by the injection molding force, and the hydraulic cylinder core-pulling is not very stable. The product is prone to flash and step difference. Moreover, in order to pull two screw holes, the mold design requires two hydraulic cylinder core-pulling, which is relatively expensive. In the later production process, maintenance is also a considerable expense. Utility Model Content

[0003] To address the aforementioned problems in the existing technology, this utility model provides a large top block and inclined top composite core-pulling structure, which uses a large top block and multiple core-pulling inclined top rod assemblies in cooperation, so that the large top block completes the core-pulling angle conversion during the ejection process, thereby completing the core-pulling of the screw hole.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a large top block inclined core-pulling structure, comprising a top block, several straight push rods, several core-pulling inclined push rods, and several sliding seats. The tops of several straight push rods are fixed on the top block, and the upper parts of several core-pulling inclined push rods are movably disposed obliquely downward inside the top block. The bottom of the core-pulling inclined push rods is vertically fixed to the middle of the sliding seats. The sliding seats are fixed on the mold and are movable in the middle. When the top block is pushed vertically upward, the core-pulling inclined push rods are pushed by the top block to move obliquely upward in a straight line along the middle of the sliding seats.

[0005] Furthermore, the top block has several oblique hollow slots, and the upper part of the core-pulling oblique push rod is set inside the hollow slots, while the lower part protrudes outside the top block.

[0006] Furthermore, the sliding seat includes a slider, the bottom of the core-pulling inclined rod is fixed on the slider, and a T-shaped groove is opened in the middle of the sliding seat, the slider is inserted into the groove and slides in the groove.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model completes the core-pulling angle conversion during the ejection process by the ejector block. Under the action of the upward ejection force of the ejector block, the ejector block pushes the product upward. At the same time, the core-pulling angled ejector rod slides obliquely upward along the fixed sliding seat. At this time, the screw hole or mounting hole on the product moves upward with the product, so that the core-pulling angled ejector rod completes the core-pulling action of the screw hole. This solves the problem of the mold having both ejector block ejection and no need for multiple sets of hydraulic cylinders for core pulling. Moreover, the mechanical form of this large ejector block does not have the problem of core pulling back, which solves the problem of production stability and makes maintenance more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is a schematic diagram of the prior art structure;

[0009] Figure 2 is a schematic diagram of the structure of the present application in cooperation with the product;

[0010] Figure 3 is an exploded view of the present application;

[0011] Figure 4 is a schematic diagram of the structure of the core-pulling inclined lifting rod, the product and the sliding seat of the present application;

[0012] Figure 5 is a sectional view of the core-pulling inclined lifting rod, the product and the sliding seat of the present application in cooperation;

[0013] Figure 6 is Figure 5 is an enlarged view of A in the middle;

[0014] Figure 7 is a schematic diagram of the structure of the present application when working;

[0015] Figure 8 is a schematic diagram of the structure of the core-pulling inclined lifting rod, the product and the sliding seat of the present application after the screw hole or mounting hole is core-pulled;

[0016] Figure 9 is a sectional view of the core-pulling inclined lifting rod, the product and the sliding seat of the present application in cooperation after the screw hole or mounting hole is core-pulled;

[0017] Figure 10 is Figure 9 is an enlarged view of B in the middle;

[0018] Figure 11 is Figure 9 is an enlarged view of C in the middle. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] Please refer to Figures 2-11The utility model provides following technical scheme: a big top block inclined top composite core pulling structure is used for ejection of product 1 with a plurality of mounting holes or screw holes, since the depth of mounting hole or screw hole on product 1 generally reaches 14mm or more, the depth is relatively deep, the size requirement is higher, the conventional oil cylinder core pulling structure is not very stable, and the phenomenon of back-off can appear, product 1 is prone to flash and step difference, which influences the installation of product 1 size hole, and moreover every screw hole on product needs to be equipped with an oil cylinder core pulling, and the cost is relatively high, the structure includes top block 2, a plurality of straight top rods 3, a plurality of core pulling inclined top rods 4 and a plurality of sliding seats 5, the number of core pulling inclined top rod 4 and sliding seat 5 is consistent with the number of screw hole or mounting hole on product 1, the top of a plurality of straight top rods 3 is fixed on top block 2 through locking block, the upper portion of a plurality of core pulling inclined top rods 4 is obliquely downward movably arranged in top block 2, the position of core pulling inclined top rod 4 and straight top rod 3 on top block 2 is not same, when product 1 has not been ejected, the screw hole or mounting hole on product 1 is obliquely downward inserted into top block 2 and the upper portion of core pulling inclined top rod 4 is invertedly buckled in the screw hole or mounting hole, the screw hole or mounting hole and core pulling inclined top rod 4 are on the same straight line, the bottom of core pulling inclined top rod 4 is vertically fixed in the middle of sliding seat 5, sliding seat 5 is obliquely upward arranged, when being installed on the mould, sliding seat 5 is fixed on the mould and the middle thereof is movable, sliding seat 5 is fixed, core pulling inclined top rod 4 cannot be driven to move upward by top block, core pulling inclined top rod 4 can only be pushed by top block to slide obliquely upward in the middle of sliding seat 5, when top block 2 is vertically upward, core pulling inclined top rod 4 is pushed by the ejection force of top block 2 to move obliquely upward in the middle of sliding seat 5 and the moving amount of core pulling inclined top rod 4 is not large, since the top of top block 2 vertically upwardly ejects product 1, the screw hole or mounting hole on product 1 can also be vertically upwardly ejected, and core pulling inclined top rod 4 is also pushed by the ejection force of top block 2 to move obliquely upward in the middle of sliding seat 5, the screw hole or mounting hole and core pulling inclined top rod 4 are always on the same straight line, the upward movement of screw hole or mounting hole makes core pulling inclined top rod 4 gradually come out, thereby completing the core pulling action, so as to realize the ejection of mould by top block and not need the difficult problem of multiple oil cylinder core pulling, and the mechanical form of top block 2 does not exist the core pulling back-off situation, and the stability of production is solved and the maintenance is more convenient.

[0021] Specifically, a plurality of inclined hollow grooves 21 are formed in top block 2, the upper portion of core pulling inclined top rod 4 is arranged in hollow groove 21, and the lower portion is exposed outside top block 2, the upper portion of hollow groove 21 is inserted by the screw hole or mounting hole on product 1, and the lower portion is inserted by core pulling inclined top rod 4, when being installed on the mould and not being ejected, core pulling inclined top rod 4 is invertedly buckled in the screw hole or mounting hole.

[0022] Specifically, the sliding seat 5 includes a sliding block 51, the core-pulling inclined ejector rod 4 is fixed at the bottom of the sliding block 51, a T-shaped clamping groove 52 is formed in the middle of the sliding seat 5, the clamping groove 52 is axially formed on the sliding seat 5, and the clamping groove 52 is also arranged in an inclined upward direction. The sliding block 51 is clamped into the clamping groove 52 and slides in the clamping groove 52, and the core-pulling inclined ejector rod 4 slides upward along the clamping groove 52 on the sliding seat 5 together with the sliding block 51.

[0023] The installation and movement process of the utility model is as follows: first, the top block 2 is fixed at the top of the locking block and the plurality of straight ejector rods 3, then the top block 2 is installed into the mold from the front, at this time, the straight ejector rods 3 pass through the guide sliding sleeve on the movable mold, the guide sliding sleeve has the function of guiding and lubricating the straight ejector rods 3, and the service life of the straight ejector rods 3 can be prolonged, then the plurality of core-pulling inclined ejector rods 4 are installed into the hollow groove 21 of the top block 2 from the movable mold, then the bottom of the core-pulling inclined ejector rods 4 is fixed with the sliding block 51 on the sliding seat 5, and the sliding seat 5 is locked to the movable mold by screws, at this time, the screw holes or mounting holes on the product 1 are counter-bored at the top of the core-pulling inclined ejector rods 4, so that the installation is completed. When the mold is ejected, the needle plate drives the top block 2 to move vertically upward, because the core-pulling inclined ejector rods 4 are placed in the hollow groove 21 in an inclined downward direction, the ejecting force of the top block 2 when moving vertically upward will give the core-pulling inclined ejector rods 4 a transverse pushing force, so that the plurality of core-pulling inclined ejector rods 4 move upward in an inclined direction along the middle of the sliding seat 5 together with the sliding block 51, when the needle plate drives the top block 2 to move vertically upward by 50 mm, the plurality of core-pulling inclined ejector rods 4 successfully complete the core-pulling action of the screw holes or mounting holes, so as to exit the counter-boring in the product 1.

[0024] When there are multiple mounting holes or screw holes counter-bored in the product 1, the utility model can solve the problems of complex mold and high size requirement of multiple mounting holes or screw holes of the product 1, avoid the waste of mold production and manufacturing cost, and avoid the expensive cost of mold later rectification.

[0025] Finally, it should be noted that: the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A large top block inclined top core combined core-pulling structure, characterized in that, The core-pulling inclined ejector rod (4) is pushed by the top block (2) to move obliquely upward in the middle of the sliding seat (5) when the top block (2) is vertically upward.

2. A large point angle inclined core composite core-drawing structure according to claim 1, characterized in that, The top block (2) is provided with a plurality of inclined hollow grooves (21), and the upper part of the core-pulling inclined ejector rod (4) is arranged in the hollow groove (21) and the lower part is exposed outside the top block (2).

3. A large point angle inclined core composite core pulling structure according to claim 2, characterized in that, The sliding seat (5) comprises a sliding block (51), and the bottom of the core-pulling inclined ejector rod (4) is fixed on the sliding block (51). The middle part of the sliding seat (5) is provided with a clamping groove (52) with a T-shaped side face, and the sliding block (51) is clamped into the clamping groove (52) and slides in the clamping groove (52).

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