CN216001228U

CN216001228U - Injection mold with movable pillow position structure

Info

Publication number: CN216001228U
Application number: CN202121198790.0U
Authority: CN
Inventors: 王耀晶; 袁先锋; 黄成明
Original assignee: Shenzhen Xinyuda Plastic Mold Co ltd
Current assignee: Shenzhen Xinyuda Plastic Mold Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-03-11
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses an injection mold with a movable pillow position structure, which comprises a front mold and a rear mold, wherein a product cavity is enclosed when the front mold and the rear mold are closed; the rear die is provided with a pillow structure, and the pillow structure comprises a fixed pillow structure and a movable pillow structure; the movable pillow structure comprises a pillow insert and a first screw, a first fixing hole is formed in the pillow insert, the first screw penetrates through the first fixing hole to fix the pillow insert on the rear die body, a gap is reserved between the first fixing hole and the first screw, and the pillow insert moves within the gap range. When the front mould temperature rose inflation, the occipital position mold insert of back mould can still keep accurate cooperation with the front mould along with removing, can effectively solve because the mould expend with heat and contract with cold characteristic leads to product flash, overlap, occipital position burn scheduling problem.

Description

Injection mold with movable pillow position structure

Technical Field

The utility model relates to the technical field of molds, in particular to an injection mold with a movable pillow structure.

Background

According to the product structure, many injection mold need design pillow position, when mould production is moulded plastics, the mould front mould is the product outward appearance face, need rise to certain degree with its temperature and just can make the product reach standard outward appearance requirement, because the mould is steel preparation, have expend with heat and contract with cold characteristic, mould front mould intensification can lead to back mould pillow position inflation and make the front and back mould match inconsistent, finally cause product flash, overlap, the pillow position burn scheduling problem, the defective rate is high, especially receive steel expend with heat and contract with cold influence big more when the product size. The conventional injection molding product often needs to be decorated with artificial shavings and burrs, so that manpower and material resources are wasted; and meanwhile, the die is frequently maintained, and the productivity is low.

Therefore, how to design a mold with a simple structure and capable of preventing pillow flashes, flashes and burns for the existing mold structure is an urgent technical problem to be solved in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provides an injection mold with a movable pillow structure.

The purpose of the utility model is realized by the following technical scheme:

an injection mold with a movable pillow position structure comprises a front mold and a rear mold, wherein a product cavity is enclosed when the front mold and the rear mold are closed;

the rear die is provided with a pillow structure, and the pillow structure comprises a fixed pillow structure and a movable pillow structure;

the movable pillow structure comprises a pillow insert and a first screw, a first fixing hole is formed in the pillow insert, the first screw penetrates through the first fixing hole to fix the pillow insert on the rear die body, a gap is reserved between the first fixing hole and the first screw, and the pillow insert moves within the gap range.

In one embodiment, the size of the gap is determined according to the use temperature of the injection mold and the expansion coefficient of the mold material.

In one embodiment, the clearance d between the first fixing hole and the first screw is 0.05-1.5 mm.

In one embodiment, the pillow insert is provided with a bevel.

In one embodiment, a shovel structure and a boss are arranged on the front die, and the shovel structure and the boss enclose a pillow position groove.

In one embodiment, the shovel structure is an L-shaped structure.

In one embodiment, the shovel structure is provided with a second fixing hole, and the shovel structure is fixed on the front die through a second screw.

In one embodiment, a clearance is designed between the fixed occipital structure and the movable occipital structure.

In one embodiment, the pillow structures are respectively arranged at two ends of the parting surface of the rear mold product.

In one embodiment, the front mold and the rear mold enclose two product cavities which are bilaterally symmetrical when the front mold and the rear mold are closed.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

the utility model relates to an injection mold with a movable pillow structure, wherein the movable pillow structures are arranged at two ends of the parting surface of a rear mold, and a gap is designed between a first fixing hole of the movable pillow structure and a first screw according to the use temperature of the mold and the expansion coefficient of a mold material.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of an injection mold with a movable pillow structure according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a rear mold of the injection mold with the movable pillow structure shown in FIG. 1;

FIG. 3 is an enlarged partial schematic view of a rear mold of the injection mold having the movable pillow structure shown in FIG. 2;

FIG. 4 is a schematic cross-sectional view of a rear mold of the injection mold with a movable pillow structure shown in FIG. 1;

FIG. 5 is an enlarged partial cross-sectional view of the rear mold of the injection mold with movable pillow structure shown in FIG. 4;

FIG. 6 is a schematic structural view of a front mold of an injection mold with a movable pillow structure, shown in FIG. 1;

fig. 7 is a partial enlarged structural schematic view of the front mold of the injection mold with the movable pillow structure shown in fig. 6.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This 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," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

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 herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, an injection mold 10 with a movable pillow structure includes a front mold 100 and a rear mold 200, wherein the front mold 100 and the rear mold 200 enclose a product cavity when being closed; a pillow structure 210 is arranged on the rear die 200, and the pillow structure 210 comprises a fixed pillow structure 211 and a movable pillow structure 212; the movable pillow structure 212 includes a pillow insert 2121 and a first screw 2122, a first fixing hole 2121a is formed on the pillow insert 2121, the first screw 2122 penetrates through the first fixing hole 2121a to fix the pillow insert 2121 to the rear mold 200, a gap 2123 is left between the first fixing hole 2121a and the first screw 2122, and the pillow insert 2121 moves within the gap 2123.

It should be noted that, in the injection molding, the molten material is injected into the cavity of the mold through the nozzle, the molten material in the cavity is pressurized, cooled, and fixed to form, the mold is opened, and the shaped product 300 is ejected from the mold through the ejection device, the average temperature of the molten material is 300-500 ℃, some molten material can even reach 600-700 ℃, the mold is heated inevitably under the action of heat transfer, the mold is generally made of metal material, and the metal material has the characteristics of thermal expansion and cold contraction, so the mold is inevitably expanded after being heated, the precision of the front mold 100 and the rear mold 200 is reduced, and particularly the pillow portion of the product is easily damaged by the burrs and the like due to the front mold 100 and the rear mold 200, therefore, the novel edible product adopts the movable pillow structure, and a gap is designed between the first fixing hole 2121a of the movable pillow structure 212 and the first screw 2122, when the front mold 100 is expanded due to temperature rise, the pillow insert 2121 of the rear mold 200 can still keep precise fit with the front mold 100 along with the movement, and the problems of product flashes, burrs, pillow burns and the like caused by the expansion and contraction characteristics of the mold can be effectively solved.

Referring to fig. 4 and 5, in one embodiment, the gap 2123 is sized according to the use temperature of the injection mold and the expansion coefficient of the mold material. Specifically, the gap 2123 between the first fixing hole 2121a and the first screw 2122 is 0.05-1.5 mm.

It should be noted that, because the expansion coefficients of different metal materials are different, and the expansion coefficients of the same metal materials are also different at different temperatures, the gap distance needs to be designed according to different molds and the temperature rise conditions of the molds during the use, so that the matching precision of the front mold 100 and the rear mold 200 can be ensured when the molds are used.

Referring to fig. 2 and 3, in one embodiment, pillow insert 2121 is provided with a bevel 2121 b. The inclined surface 2121b is connected to the end surface of the product 300 and is designed according to the structural requirement of the product 300.

Referring to fig. 2 and 3, in one embodiment, a clearance 2111 is designed between the fixed occipital structure 211 and the movable occipital structure 212. Specifically, the length of the fixed occipital structure 211 is shorter than that of the movable occipital structure 212, so a clearance 2111 is formed between the fixed occipital structure 211 and the movable occipital structure 212, which is mainly convenient for the disassembly and assembly of the movable occipital structure 212 and improves the efficiency. Meanwhile, the fixed pillow structure 211 is mainly used for limiting the position of the movable pillow structure 212 to a certain degree, so that the precision of the mold 10 is guaranteed.

Referring to fig. 6 and 7, in an embodiment, the front mold 100 is provided with a shovel structure 110 and a boss 120, the shovel structure 110 and the boss 120 enclose a pillow slot 130, and the shovel structure 110 is an L-shaped structure. When the mold is closed, the pillow structure is matched with the pillow groove 130, so that the pillow structure 210 is fixed.

Referring to fig. 6 and 7, in one embodiment, the shovel structure 110 is provided with a second fixing hole 111, and is fixed on the front mold 100 by a second screw 112. Specifically, the shovel structure 110 is provided with two second fixing holes 111, so that the stability of the shovel structure 110 on the front mold 100 can be improved.

Referring to fig. 6 and 7, in one embodiment, the two ends of the parting surface of the rear mold 200 are respectively provided with pillow structures 210. So in the process of moulding plastics, can be better seal glue at parting surface both ends.

Referring to fig. 1, in one embodiment, the front mold 100 and the rear mold 200 enclose two product cavities that are bilaterally symmetrical when the molds are closed. Thus, two products 300 can be obtained by one-time injection molding, and the production efficiency is improved.

the utility model relates to an injection mold 10 with a movable pillow structure, wherein the movable pillow structures 210 are arranged at two ends of the parting surface of a rear mold 200, and a gap 2123 is designed between a first fixing hole 2121a and a first screw 2122 of the movable pillow structure 212 according to the use temperature of the mold and the expansion coefficient of a mold material, so that when the temperature of a front mold 100 rises and expands, a pillow insert 2121 of the rear mold 200 moves along with the movement and keeps precise fit with the front mold 100, the problems of product burrs, flash, pillow burn and the like caused by the expansion and contraction characteristics of the mold can be effectively solved, the yield of products is improved, the loss of manpower and material resources is reduced, the maintenance frequency of the mold is reduced, and the productivity is increased.

The above embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An injection mold with activity pillow bit architecture, its characterized in that includes: the front die and the rear die enclose a product cavity when being closed;

2. The injection mold with movable pillow structure of claim 1, wherein: the size of the gap is determined according to the use temperature of the injection mold and the expansion coefficient of the mold material.

3. The injection mold with movable pillow structure of claim 2, wherein: the clearance between the first fixing hole and the first screw is 0.05-1.5 mm.

4. The injection mold with movable pillow structure of claim 2, wherein: the pillow position insert is provided with an inclined plane.

5. The injection mold with movable pillow structure of claim 1, wherein: the front die is provided with a shovel machine structure and a boss, and the shovel machine structure and the boss enclose a pillow position groove.

6. The injection mold with movable pillow structure of claim 5, wherein: the shovel machine structure is an L-shaped structure.

7. The injection mold with movable pillow structure of claim 6, wherein: the shovel machine structure is provided with a second fixing hole and is fixed on the front die through a second screw.

8. The injection mold with movable pillow structure of claim 1, wherein: a clearance is designed between the fixed pillow structure and the movable pillow structure.

9. The injection mold with movable pillow structure of claim 1, wherein: and the two ends of the parting surface of the rear mold product are respectively provided with the pillow position structures.

10. The injection mold with movable pillow structure of claim 9, wherein: and the front die and the rear die enclose two product cavities which are bilaterally symmetrical when being closed.