CN107336410B

CN107336410B - Injection mould

Info

Publication number: CN107336410B
Application number: CN201710751664.5A
Authority: CN
Inventors: 段均元
Original assignee: Kunshan Jiahua Automotive Electronic Technology Co ltd
Current assignee: Kunshan Jiahua Automotive Electronic Technology Co ltd
Priority date: 2017-08-28
Filing date: 2017-08-28
Publication date: 2023-01-31
Anticipated expiration: 2037-08-28
Also published as: CN107336410A

Abstract

The invention provides an injection mold which comprises a fixed mold and a movable mold which are matched with each other. And a cavity for molding a plastic product is formed in the fixed die. The fixed die is also internally provided with a sliding groove formed around the die cavity and a sliding block matched with the sliding groove, and the die cavity is formed between the sliding blocks. The movable die is provided with a mold core protruding into the cavity, a buckling structure matched with one end of the sliding block facing the movable die, and an ejection structure for ejecting the plastic product. The buckling structure and the sliding block are matched by inclined planes, so that when the movable die moves towards the direction of keeping away from the fixed die, the buckling structure drives the sliding block to move towards the direction of keeping away from the fixed die and outwards in the sliding groove. The injection mold is simple in integral structure, the sliding block can be gradually separated from a plastic product when being driven to move by the movable mold, and demolding is convenient.

Description

Injection mould

Technical Field

The invention relates to an injection mold, in particular to an injection mold which is simple in structure and convenient to demold.

Background

An injection mold is a tool for producing plastic products; and is also a tool for giving the plastic product complete structure and accurate dimension. The injection molding specifically refers to injecting the heated and melted plastic into a mold cavity from an injection molding machine at high pressure, and obtaining a molded product after cooling and solidification. In general, when a plastic product to be molded is provided with grooves or protrusions distributed in both the vertical and horizontal directions, the corresponding injection mold is required to be provided with a corresponding mold core for corresponding molding. However, after the plastic product is molded, the mold cores in different directions interfere with the grooves or protrusions of the plastic product, so that the mold release design is troublesome, and the mold cores are usually implemented by arranging movable mold plates capable of moving in different directions, thereby resulting in a large and complex design of the whole injection mold.

In view of the above, there is a need for an improved injection mold to solve the above problems.

Disclosure of Invention

The invention aims to provide an injection mold which is simple in structure and convenient to demold.

In order to achieve the purpose, the invention provides an injection mold which comprises a fixed mold and a movable mold which are matched with each other, wherein a cavity for molding a plastic product is formed in the fixed mold, a sliding groove formed around the cavity and a sliding block matched with the sliding groove are also arranged in the fixed mold, and the cavity is formed between the sliding blocks; the movable die is provided with a mold core protruding into the cavity, a buckling structure matched with one end of the sliding block facing the movable die and an ejection structure for ejecting a plastic product; the buckling structure and the sliding block are matched by inclined planes, so that when the movable die moves towards the direction of keeping away from the fixed die, the buckling structure drives the sliding block to move towards the direction of keeping away from the fixed die and outwards in the sliding groove.

As a further improvement of the invention, the inner side of the slide block is provided with a groove for forming a protruding structure on the outer side of the product to be injected, and the groove is formed as a part of the cavity.

As a further improvement of the present invention, a first inner wall surface extending obliquely outward is formed on one side of the chute facing the cavity, an outer wall surface of the slider is matched with the first inner wall surface, and when the movable mold drives the slider to move, the slider moves along the first inner wall surface.

As a further improvement of the invention, guide structures which are mutually matched in a sliding manner are arranged on two sides of the sliding chute and the sliding block, and the guide structures extend obliquely outwards so as to ensure that the sliding block moves towards the direction away from the fixed die and outwards in the sliding chute when the movable die drives the sliding block to move.

As a further improvement of the invention, the sliding block is provided with a main body part matched with the sliding chute and a matching block connected to one end of the main body part facing to the movable die, the matching block is provided with a connecting part vertically extending from a position close to the outer side of the bottom of the sliding block and a matching part transversely extending inwards from the connecting part, and one side of the matching part facing to the main body part is provided with a matching surface extending obliquely so as to be matched with the buckling structure.

As a further improvement of the invention, the matching surface extends inwards from the fixed die in an inclined way towards the movable die.

As a further improvement of the present invention, the movable mold includes a movable mold base, the retaining structure is a retaining block fixed on the movable mold base, and an accommodating groove for accommodating the matching portion is formed in the retaining block.

As a further development of the invention, the ejection structure is arranged adjacent to the core.

As a further improvement of the invention, the injection mold only comprises one set of the fixed mold and the movable mold.

According to the invention, the sliding groove and the sliding block structure are arranged around the cavity on the fixed die, and when the movable die moves towards the direction far away from the fixed die, the clamping structure arranged on the movable die can drive the sliding block to move towards the direction far away from the fixed die and outwards in the sliding groove; therefore, when the outer side of the plastic product to be molded is provided with a groove or a protrusion structure in the horizontal direction, the plastic product can be molded by arranging a corresponding structure on the sliding block; the injection mold has the advantages that the overall structure is simple, the slide block can be gradually separated from the plastic product when being driven by the movable mold to move, and the demolding is convenient.

Drawings

FIG. 1 is a perspective view of a plastic product molded by the injection mold of the present invention.

FIG. 2 is a perspective view of the injection mold of the present invention.

FIG. 3 is an exploded perspective view of the injection mold of FIG. 2 with the movable mold separated from the stationary mold.

Fig. 4 is a view of the injection mold of fig. 3 from another angle.

Fig. 5 is a further exploded view of the injection mold shown in fig. 4.

Fig. 6 isbase:Sub>A sectional view of the injection mold of fig. 2, in whichbase:Sub>A plastic product is molded, taken along linebase:Sub>A-base:Sub>A.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 2 to fig. 6, a preferred embodiment of an injection mold 100 according to the present invention is shown. The injection mold 100 is used for molding a plastic product 900 as shown in fig. 1 and comprises a fixed mold 1 and a movable mold 2 which are matched with each other.

Referring to fig. 4 and 5 in combination with fig. 1, the fixed mold 1 includes a fixed mold base 11, a slide block 12 disposed on the fixed mold base 11 in a matching manner, and a fixed mold core 13.

A cavity 111 for molding the plastic product 900 and a chute 112 formed around the cavity 111 are formed in the fixed mold base 11. The slide groove 112 is open toward the cavity 111 and the movable mold 2, and a first inner wall surface 1121 extending obliquely outward is formed on a side facing the cavity 111. In this embodiment, three sliding grooves 112 are formed around the cavity 111 to accommodate three sliders 12.

The cavity 111 is formed between the sliders 12. In order to correspondingly mold the spacing protrusions 901 at the outer side of the plastic product 900, the inner side of the slider 12 is provided with a corresponding groove 121. The groove 121 is formed as a part of the cavity 111 to co-mold the plastic product 900.

Referring to fig. 3 and 6 in combination with fig. 1, the movable mold 2 includes a movable mold base 21, a core 22 protruding into the cavity 111, a retaining structure 23 engaged with an end of the slide block 12 facing the movable mold 2, and an ejecting structure 24 for ejecting a plastic product 900. The buckling structure 23 and the sliding block 12 are matched by inclined planes, so that when the movable mold 2 moves towards the direction away from the fixed mold 1, the buckling structure 23 drives the sliding block 12 to move towards the direction away from the fixed mold 1 and outwards in the sliding groove 112.

Specifically, as shown in fig. 4 to 6, the slider 12 has a main body portion 122 engaged with the slide groove 112 and an engagement piece 123 connected to an end of the main body portion 122 facing the movable mold 2.

The fitting block 123 has a connecting portion 1231 extending vertically from a position near the outer side of the bottom of the body portion 122 and a fitting portion 1232 extending laterally inward from the connecting portion 1231. The engagement portion 1232 extends obliquely toward one side surface of the body portion 122, i.e., forms an obliquely extending engagement surface 1233 to engage with the retaining structure 23. The fitting surface 1233 is inclined and extended inward from the fixed mold 1 toward the movable mold 2, so that when the retaining structure 23 drags the sliding block 12 to move, the force applied to the sliding block 12 can be decomposed into a pulling force and an outward force in the direction toward the movable mold 2, so that the sliding block 12 can move toward the movable mold 2 and outward at the same time, and further gradually separated from the molded plastic product 900 in the moving process of the sliding block 12, thereby facilitating the demolding of the plastic product 900.

The outer wall surface of the main body 122 of the slider 12 extends obliquely outward and is matched with the first inner wall surface 1121, so that when the movable mold 2 drives the slider 12 to move, the slider 12 moves along the first inner wall surface 1121. The groove 121 is formed inside the body part 122.

Further, in this embodiment, the sliding slot 112 and the sliding block 12 are provided with guiding structures 13 at two sides thereof, which are in sliding fit with each other. The guiding structure 13 extends obliquely outward to further ensure that when the movable mold 2 drives the sliding block 12 to move, the sliding block 12 moves in the sliding groove 112 toward the direction away from the fixed mold 1 and outward at the same time.

Specifically, as shown in fig. 4 and 5, a guiding groove 1121 is respectively recessed at positions adjacent to the first inner wall surface 1121 at two sides of the sliding slot 112, and guiding strips 1221 slidably engaged with the guiding grooves 1121 are respectively disposed at two sides of the sliding block 12. The guiding grooves 1121 and the guiding strips 1221 constitute the guiding structure 13.

In the present invention, the retaining structure 23 of the movable mold 2 is a retaining block fixed to the movable mold base 21, and a receiving groove 231 for receiving the engaging portion 1232 is formed in the retaining block.

Referring to fig. 3 and 6, the ejection structure 24 is disposed adjacent to the mold core 22, so that after the plastic product 900 is molded, the ejection structure 24 abuts against the bottom of the plastic product 900, and the plastic product 900 is conveniently ejected from the mold core 22.

From the above, in the present invention, by arranging the sliding chute 112 and the slider 12 structure around the cavity 111 on the fixed mold 1, and when the movable mold 2 moves away from the fixed mold 1, the retaining structure 23 arranged on the movable mold 2 can drive the slider 12 to move away from the fixed mold 1 and outward in the sliding chute 112; therefore, when the outer side of the plastic product 900 to be molded is provided with a groove or a protrusion structure in the horizontal direction, the plastic product can be formed by arranging a corresponding structure on the sliding block 12; the injection mold 100 has a simple overall structure, and can be separated from the plastic product 900 gradually when the slide block 12 is driven by the movable mold 2 to move, so that the demolding is convenient.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides an injection mold, includes cover half and movable mould of mutually supporting, be formed with the die cavity that is used for the shaping plastic product in the cover half, its characterized in that: the fixed die is also internally provided with a sliding chute formed around the cavity and a sliding block matched with the sliding chute, and the cavity is formed between the sliding blocks; the movable die is provided with a mold core protruding into the cavity, a buckling structure matched with one end of the sliding block facing the movable die and an ejection structure for ejecting a plastic product; the buckling structure and the sliding block are matched by adopting an inclined plane, so that when the movable die moves towards the direction away from the fixed die, the buckling structure drives the sliding block to move towards the direction away from the fixed die and outwards in the sliding groove; the inner side of the sliding block is provided with a groove used for forming a protruding structure on the outer side of a product to be injection-molded, and the groove forms a part of a cavity; a first inner wall surface extending outwards in an inclined manner is formed on one side, facing the cavity, of the sliding chute, the outer wall surface of the sliding block is matched with the first inner wall surface, and when the sliding block is driven by the movable die to move, the sliding block moves along the first inner wall surface; the slider have with spout matched with main part and connect in the cooperation piece of main part towards movable mould one end, the cooperation piece has the connecting portion that the position department of being close to the outside from the slider bottom vertically extends and the cooperation portion that inwards transversely extends from connecting portion, cooperation portion forms the fitting surface that the slope extends towards one side of main part to cooperate with the structure of detaining.

2. The injection mold of claim 1, wherein: the spout and the slider both sides are provided with sliding fit's guide structure each other, guide structure extends to lean out, in order to ensure when the movable mould drives the slider and removes, the slider is in simultaneously in the spout towards keeping away from the cover half direction and outwards removing.

3. The injection mold of claim 1, wherein: the matching surface extends from the fixed die to the movable die in an inward inclined mode.

4. The injection mold of claim 1, wherein: the movable die comprises a movable die holder, the buckling structure is a buckling block fixed on the movable die holder, and an accommodating groove used for accommodating the matching part is formed in the buckling block.

5. The injection mold of claim 1, wherein: the ejection structure is disposed adjacent to the core.

6. The injection mold of claim 1, wherein: the injection mold only comprises a group of fixed mold and movable mold.