CN214488790U

CN214488790U - Secondary core pulling device

Info

Publication number: CN214488790U
Application number: CN202022874195.6U
Authority: CN
Inventors: 冼步云; 吴昌淳; 吴勇飞; 焦日辉; 程立汉; 苏隆杰; 姚诗思
Original assignee: Zhaoqing Hongtai Mould Manufacturing Co ltd
Current assignee: Zhaoqing Hongtai Mould Manufacturing Co ltd
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2021-10-26
Anticipated expiration: 2030-12-02

Abstract

The utility model discloses a secondary core-pulling device, which comprises an insert component and a slide block, wherein one end of the slide block is connected with a slide seat, and the surface of the other end is provided with an embedded groove; the insert component is embedded in the embedded groove; the insert assembly comprises an outer insert, an inner insert and a core insert; an axial first embedding hole is formed in the outer insert; an axial second embedding hole is formed in the inner insert; the core insert is embedded in the second embedding hole; the outer insert is embedded in the embedded groove; the inner embedded piece is embedded in the first embedding hole; the outer insert is coaxially disposed with the inner insert and the core insert. The utility model discloses an adopt the structural design of three-layer inserts to set up the spring between inserts and the core inserts including, make the core inserts under the effect that product packing power and spring stroke secondary were taken out, realize that the drawing of patterns is smooth, reduced product deformation and thick wall shrinkage porosity moreover, promoted the quality of product, prolonged mould life.

Description

Secondary core pulling device

Technical Field

The utility model relates to the technical field of mold, especially, relate to a secondary device of loosing core.

Background

In a die-casting die, a single-slide block one-step core-pulling mechanism is generally adopted for traditional similar products, but for a plurality of dies with large inner hole packing force and long core-pulling distance, the structure is difficult to demould; meanwhile, the problems of deformation, tension cracking, local thick wall shrinkage and the like of a product are easily caused during demoulding; and forced mould opening easily leads to mould, slider seat and hydro-cylinder to damage, reduces the life of mould.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a secondary core pulling device which can lead the product to be smoothly demoulded and solve the problem of thick wall shrinkage porosity.

In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:

a secondary core pulling device comprises an insert component and a sliding block, and is characterized in that one end of the sliding block is connected with a sliding seat, and an embedded groove is formed in the surface of the other end of the sliding block; the insert component is embedded in the embedded groove;

the insert assembly comprises an outer insert, an inner insert and a core insert; an axial first embedding hole is formed in the outer insert; an axial second embedding hole is formed in the inner insert;

the second embedding hole is of a counter bore structure and comprises a through hole and a counter bore which are arranged from top to bottom;

the core insert includes a core insert body and a connecting portion; the core insert body and the connecting portion are arranged vertically; after the core insert is embedded in the second embedding hole, the core insert main body is positioned in the through hole, and the connecting part is positioned in the counter bore; the outer insert is embedded in the embedded groove; the inner embedded piece is embedded in the first embedding hole; the outer insert, the inner insert and the core insert are coaxially arranged;

exhaust gaps are arranged between the outer insert and the inner insert and between the inner insert and the core insert.

Preferably, the bottom surface of the counter bore is provided with three or more connecting holes by taking the axis of the counter bore as the circumference of the center; the connecting hole is arranged in parallel with the counter bore; three or more spring guide rods and springs are arranged between the core insert and the inner insert; one end of the spring guide rod is arranged in the connecting hole, and the other end of the spring guide rod extends out of the connecting hole to be connected with the connecting part; the spring is sleeved on the spring guide rod.

Preferably, a cooling cavity is formed in the core insert; and a spot cooling device is arranged on the cooling cavity.

Preferably, the unilateral gap between the inner insert and the first insert hole is 0.03-0.10 mm; the unilateral clearance between the core insert and the through hole is 0.03-0.10 mm.

Preferably, the spring is a high-temperature-resistant heavy-load spring.

Preferably, the surface roughness of the outer insert, the inner insert and the core insert is less than or equal to Ra0.4.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the three-layer insert structure design composed of the outer insert, the inner insert and the core insert is adopted, and the spring guide rod are arranged between the inner insert and the core insert, so that the core insert realizes smooth demolding under the action of secondary drawing of product packing force and spring stroke, the product deformation and thick wall shrinkage are reduced, the product quality is improved, and the service life of the mold is prolonged.

2. An exhaust gap is formed between the three layers of inserts, and a spot cooling device is arranged in a cooling cavity of the core insert, so that the exhaust effect is increased, the local exhaust is improved, and the overall quality of a product is further improved.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure A-A in FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at B;

wherein: insert assembly 1, slider 2, slide 3, spring guide 4, spring 5, spot cooling device 6, insert groove 21, external insert 11, internal insert 12, core insert 13, first insert hole 111, second insert hole 121, core insert body 131, connecting portion 132, cooling cavity 133, through hole 1211, counterbore 1212, connecting hole 1213.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "upper," "lower," "front," "rear," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The invention will be further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1-3, a secondary core pulling device comprises an insert assembly 1 and a slide block 2, and is characterized in that one end of the slide block 2 is connected with a slide seat 3, and the surface of the other end is provided with an embedded groove 21; the insert component 1 is embedded in the embedding groove 21.

The insert assembly 1 comprises an outer insert 11, an inner insert 12 and a core insert 13; an axial first insert hole 111 is formed in the outer insert 11; an axial second insert hole 121 is formed in the inner insert 12;

the second insert hole 121 is a counterbore structure, and includes a through hole 1211 and a counterbore 1212 arranged from top to bottom.

The core insert 13 includes a core insert body 131 and a connecting portion 132; the core insert body 131 and the connecting portion 132 are arranged vertically; after the core insert 13 is inserted into the second insert hole 121, the core insert body 131 is positioned in the through hole 1211, and the connecting portion 132 is positioned in the counterbore 1212; the outer insert 11 is embedded in the embedded groove 21; the insert 12 is inserted into the first insertion hole 111; the insert 11 is arranged coaxially with the insert 12 and the core insert 13.

Exhaust gaps are arranged between the outer insert 11 and the inner insert 12 and between the inner insert 12 and the core insert 13; as the slide 2 is withdrawn, the core insert 13 moves relative to the insert 12, thereby increasing venting and improving local venting.

Further, as shown in fig. 2 and 3, the bottom surface of the counterbore 1212 is provided with three or more connecting holes 1213 around the axis of the counterbore 1212 as a center; the connecting hole 1213 is arranged in parallel with the counter bore 1212; three or more spring guide rods 4 and springs 5 are arranged between the core insert 13 and the inner insert 12; one end of the spring guide rod 4 is arranged in the connecting hole 1213, and the other end extends out of the connecting hole 1213 to be connected with the connecting part 132; the spring 5 is sleeved on the spring guide rod 4.

In the embodiment, when the mold is closed, raw materials are injected into the mold, enter the insert assembly 1, press the inner insert 12 to move towards one side of the slide block 2 relative to the core insert 13, and deform the compression spring 5; after the die casting is finished, the insert component 1 and the sliding block 2 are subjected to the wrapping force of the product; during demoulding, when the slide block 2 is pulled out, the mold core insert 13 is pulled out for the second time by virtue of the product packing force and the spring stroke and exhausts air, and the product is reset under the action of the elastic force of the spring 5 after being separated; through foretell structure setting, completion drawing of patterns that can be smooth ensures the quality of product, effectively solves 2 local package power of slider and leads to the problem that the product warp and thick wall shrinkage porosity greatly.

Further, as shown in FIG. 3, a cooling cavity 133 is formed in the core insert 13; the cooling cavity 133 is provided with a spot cooling device 6; through setting up some cold charge devices 6 can be fast, evenly cool off core insert main part 131, promote the reliability of loosing core, improve the internal quality of product.

Further, the unilateral gap between the inner insert 12 and the first insert hole 111 is 0.05 mm; the unilateral gap between the core insert 13 and the through hole 1211 is 0.05mm, the process of slow wire moving is adopted, and the requirement of the gap precision, namely the coaxiality of the outer insert 11 and the inner insert 12 and the relative motion between the inner insert 12 and the core insert 13, is ensured, and meanwhile, the exhaust effect is ensured.

Furthermore, the spring 5 is a high-temperature-resistant heavy-load spring, so that the stability and reliability of the secondary core pulling device are improved.

Furthermore, the surface roughness of the outer insert, the inner insert and the core insert is less than or equal to Ra0.4.

The utility model discloses a well adoption is by the three-layer inserts structural design that outer insert 11, interior inserts 12 and core inserts 13 are constituteed to set up spring 5 and spring guide 4 between interior inserts 12 and core inserts 13, make core inserts 13 under the effect that product packing power and 5 stroke secondaries of spring were taken out, realize that the drawing of patterns is smooth, reduced product deformation and thick wall shrinkage porosity moreover, promoted the quality of product, prolonged mould life.

Meanwhile, an exhaust gap is formed between the three layers of inserts, and the spot cooling device 6 is arranged in the cooling cavity 133 of the core insert 13, so that the exhaust effect is increased, the local exhaust is improved, and the overall quality of a product is further improved.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the present invention.

Claims

1. A secondary core pulling device comprises an insert component and a sliding block, and is characterized in that one end of the sliding block is connected with a sliding seat, and an embedded groove is formed in the surface of the other end of the sliding block; the insert component is embedded in the embedded groove;

2. The secondary core pulling device according to claim 1, wherein the bottom surface of the counter bore is circumferentially provided with three or more connecting holes by taking the axis of the counter bore as a center; the connecting hole is arranged in parallel with the counter bore; three or more spring guide rods and springs are arranged between the core insert and the inner insert; one end of the spring guide rod is arranged in the connecting hole, and the other end of the spring guide rod extends out of the connecting hole to be connected with the connecting part; the spring is sleeved on the spring guide rod.

3. The secondary core pulling device according to claim 1, wherein a cooling cavity is formed in the core insert; and a spot cooling device is arranged on the cooling cavity.

4. The secondary core pulling device according to claim 1, wherein a single-side gap between the inner insert and the first insert hole is 0.03-0.10 mm; the unilateral clearance between the core insert and the through hole is 0.03-0.10 mm.

5. The secondary core pulling device according to claim 2, wherein the spring is a high-temperature-resistant heavy-load spring.

6. The secondary core pulling device of claim 1, wherein the surface roughness of the outer insert, the inner insert and the core insert is less than or equal to Ra0.4.