CN110154330B

CN110154330B - Core-pulling ejection mechanism of injection mold

Info

Publication number: CN110154330B
Application number: CN201910556973.6A
Authority: CN
Inventors: 史恩波
Original assignee: Zhejiag Taizhou Meiduo Mould Co ltd
Current assignee: Zhejiag Taizhou Meiduo Mould Co ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2021-04-23
Anticipated expiration: 2039-06-25
Also published as: CN110154330A

Abstract

The invention relates to a core-pulling ejection mechanism of an injection mold, which comprises a movable mold and a fixed mold, wherein the fixed mold comprises a fixed mold seat plate and a fixed mold insert, the movable mold comprises a movable mold seat plate, the movable mold insert is fixed on the movable mold seat plate, a stripper plate is further arranged on the movable mold seat plate, a sliding block is arranged on the stripper plate, the movable mold insert penetrates through the stripper plate and forms a mold cavity together with the sliding block and the fixed mold insert, and a fixed-distance parting device is further arranged on the mold. Compared with the prior art, the invention is suitable for demoulding of the transparent bottle rack of the refrigerator, adopts the core-pulling ejection structure of the ejector plate and the slide block, reduces the parting line of the appearance surface of the product, improves the attractiveness of the product, has simple structure and convenient ejection, and ensures the smooth and effective production of the product.

Description

Core-pulling ejection mechanism of injection mold

Technical Field

The invention relates to a core-pulling ejection mechanism of an injection mold, and belongs to the technical field of injection molds.

Background

The bottom of the transparent bottle rack of the refrigerator adopts diamond flowers, the finished product is transparent and glittering, the appearance is attractive, the requirements of human engineering are met, and the structure is widely applied to household appliances such as refrigerators. The product is formed by injection molding through a mold, the sliding block is usually adopted for core pulling and then ejection when the mold is ejected, and the ejection mode increases the parting line of the appearance surface of the product and influences the attractiveness of the product.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a core-pulling ejection mechanism of an injection mold.

The technical scheme adopted by the invention for realizing the purpose is as follows:

injection mold's ejection mechanism of loosing core, including movable mould and cover half, the cover half includes cover half bedplate and cover half insert, the movable mould includes the movable mould bedplate, be fixed with the movable mould on the movable mould bedplate and insert, still install the stripper plate on the movable mould bedplate, install the slider on the stripper plate, the movable mould is inserted and is passed the stripper plate, and with slider, cover half insert constitute the die cavity jointly, still install the distance on the mould and divide the type device.

As a further optimization of the above technical solution: the fixed-distance parting device comprises a stop block, the stop block is fixed on the stripper plate, a first slideway and a second slideway are longitudinally formed in the stop block, a fixed die pull rod is installed in the first slideway, the fixed die pull rod is fixed on the fixed die, a limit groove is formed in the fixed die pull rod, two side walls of the limit groove are respectively formed into a first slide-in inclined surface and a positioning surface, and a first guide slide-in inclined surface is further formed at one end of the fixed die pull rod;

the movable die pull rod is installed in the second slide way, the movable die pull rod is fixed on the movable die base plate through the tail portion of the movable die pull rod, a sliding groove is formed in the middle of the movable die pull rod, a guide slide block is arranged at the head portion of the movable die pull rod, and a second sliding-in inclined surface and a second sliding-out inclined surface are formed in the upper portion and the lower portion of one side face of the guide slide block respectively.

As a further optimization of the above technical solution: still transversely there is the mounting groove in the stopper, the mounting groove intercommunication first slide with the second slide, install the spring in the mounting groove, the one end of spring is fixed mounting groove tank bottom, the other end are connected with the stopper, the system has the third slide in the stopper, system on the third slide have with it leads the slide-out inclined plane and leads the slide-in inclined plane with the second to lead the slider complex, during the compound die the slip recess is located in the third slide, the head of stopper is located the spacing inslot, the head both sides system of stopper has the third respectively to lead and slides-in inclined plane and locking surface.

As a further optimization of the above technical solution: the movable mold base plate is internally provided with a limiting hole, the limiting hole consists of a large hole and a small hole, the small hole is positioned at the upper part of the large hole, a step is formed between the large hole and the small hole, a limiting screw is arranged in the limiting hole, the cap head of the limiting screw is positioned in the large hole, and the rod part of the limiting screw penetrates through the small hole and is fixed at the bottom of the pushing plate.

As a further optimization of the above technical solution: the fixed die further comprises a splitter plate and two sets of hot runner systems, the two sets of sliding blocks and the die cavity are both provided with two sets of sliding blocks, and molten plastic enters the die cavity through the hot runner systems after being split by the splitter plate.

As a further optimization of the above technical solution: and the surface of the fixed die insert is provided with die patterns.

Compared with the prior art, the invention is suitable for demoulding of the transparent bottle rack of the refrigerator, adopts the core-pulling ejection structure of the ejector plate and the slide block, reduces the parting line of the appearance surface of the product, improves the attractiveness of the product, has simple structure and convenient ejection, and ensures the smooth and effective production of the product.

Drawings

FIG. 1 is a schematic view of the structure of the present invention at the time of clamping.

FIG. 2 is a schematic sectional view showing the distance separating device of the present invention.

Fig. 3 is a partially enlarged view of a portion a in fig. 1.

Detailed Description

The invention is further described with reference to the following figures and detailed description. As shown in fig. 1-3, injection mold's knockout mechanism of loosing core, including movable mould and cover half, the cover half includes cover half bedplate 10 and cover half insert 7, the movable mould includes movable mould bedplate 2, be fixed with movable mould insert 4 on the movable mould bedplate 2, still install stripper plate 3 on the movable mould bedplate 2, install slider 5 on the stripper plate 3, movable mould insert 4 passes stripper plate 3, and with slider 5, cover half insert 7 constitute die cavity 6 jointly, the back of finishing of moulding plastics, the product back-off is located in slider 5. And a distance parting device is also arranged on the mould. The distance parting device ensures that all parting surfaces of the die are opened in a certain sequence.

In the above technical scheme: as shown in fig. 2, the distance parting device includes a stopper 11, the stopper 11 is fixed on the stripper plate 3, a first slide 111 and a second slide 112 are vertically made in the stopper 11, a fixed die pull rod 12 is installed in the first slide 111, the fixed die pull rod 12 is fixed on the fixed die, a limiting groove 121 is made on the fixed die pull rod 12, two side walls of the limiting groove 121 are respectively made into a first slide-in inclined surface 1211 and a positioning surface 1212, and a first guide slide-in inclined surface 122 is further made at one end of the fixed die pull rod 12.

In the above technical scheme: a movable mold pull rod 13 is installed in the second slide rail 112, the movable mold pull rod 13 is fixed on the movable mold base plate 2 through the tail of the movable mold pull rod 13, a sliding groove 131 is formed in the middle of the movable mold pull rod 13, a guide slide block 132 is formed at the head of the movable mold pull rod 13, and a second slide-in inclined surface 1321 and a second slide-out inclined surface 1322 are respectively formed at the upper part and the lower part of one side surface of the guide slide block 132.

In the above technical scheme: still transversely there is mounting groove 113 in the dog 11, mounting groove 113 intercommunication first slide 111 with second slide 112, install spring 14 in the mounting groove 113, the one end of spring 14 is fixed 113 tank bottoms of mounting groove, the other end are connected with stopper 15, system has third slide 151 in the stopper 15, system on the third slide 151 with lead slider 132 complex to lead and slide out inclined plane 1511 and second and lead and slide into inclined plane 1512, during the compound die slide groove 131 is located in the third slide 151, the head of stopper 15 is located in spacing groove 121, stopper 15's head both sides system has the third respectively and leads and slide into inclined plane 152 and locking surface. The positioning surface 1212 is matched with the locking surface to cause the fixed die pull rod 12 to be clamped by the limiting block 15, and a certain locking effect is exerted on the parting surface between the movable die and the fixed die, so that the stripper plate 3 and the movable die base plate 2 are firstly parted.

In the above technical scheme: the movable mold base plate 2 is internally provided with a limiting hole 21, the limiting hole 21 is composed of a large hole and a small hole, the small hole is positioned at the upper part of the large hole, a step 211 is formed between the large hole and the small hole, a limiting screw 1 is arranged in the limiting hole 21, a cap head 101 of the limiting screw 1 is positioned in the large hole, and a rod part 102 of the limiting screw 1 penetrates through the small hole and is fixed at the bottom of the ejector plate 3. When the stripper plate 3 performs the ejection movement, the cap head 101 moves to touch the step 211 to be limited, so as to limit the ejection distance of the stripper plate 3.

In the above technical scheme: the fixed die further comprises a splitter plate 9 and two sets of hot runner systems 8, the two sets of the hot runner systems 5 and the die cavity 6 are arranged, the hot runner systems 8 penetrate through the fixed die insert 7 to be directly contacted with the die cavity 6, and molten plastic is split by the splitter plate 9 and then enters the respective die cavity 6 through the hot runner systems 8. Two products can be completed in one injection molding cycle, and the production efficiency is greatly improved. The hot runner system is adopted, so that the defects of material scars, flow marks and the like after the product is trimmed are avoided, and the product performance is not influenced.

In the above technical scheme: as shown in FIG. 3, the surface of the fixed die insert 7 is formed with a die pattern 71. The mold pattern 71 is a single inlay and is convenient to process.

The working process of the invention is as follows, after the injection molding machine finishes die assembly, molten plastic enters the die cavity 6 through the hot runner system 8, after the product is molded, because the fixed die pull rod 12 is clamped by the limiting block 15 to play a certain locking role on the parting surface between the movable and fixed dies, the first parting is firstly carried out between the stripper plate 3 and the movable die base plate 2, the movable die base plate 2 drives the movable die insert 4 to move downwards, because the two ends of the product are reversely positioned in the sliding block 5, the product is still fixed when the movable die insert 4 moves downwards, and the partial separation of the product and the movable die insert 4 is realized; in the process, the movable mold pull rod 13 is also driven by the movable mold seat plate 2 to move downwards, the movable mold pull rod moves downwards for a certain distance and then slides out of the inclined plane 1322 to be contacted with the guide sliding-out inclined plane 1511, so that the guide slide block 132 slides into the third slide channel 151, at the moment, the limiting block 15 is driven to move leftwards integrally, the spring 14 is compressed, the head of the limiting block 15 is separated from the limiting groove 121, the fixed mold pull rod 12 is unlocked and driven by the mold opening force to move upwards to be separated from the first slide channel 111, the mold is subjected to secondary parting, the movable mold starts to separate, the movable mold seat plate 2 drives the ejector plate 3, the slide block 5 and the product to move downwards, meanwhile, the; and finally, the oil cylinder of the injection molding machine drives the stripper plate 3 to perform ejection movement, so that the product is completely separated from the movable die insert 4, the cap head 101 of the limit screw 1 is in contact with the step 211 to limit the ejection distance of the stripper plate 3, and finally, the manipulator finishes workpiece taking.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concept of the present invention should fall within the scope of the present invention.

Claims

1. The core-pulling ejection mechanism of the injection mold comprises a movable mold and a fixed mold, wherein the fixed mold comprises a fixed mold seat plate (10) and a fixed mold insert (7), the movable mold comprises a movable mold seat plate (2), and the movable mold insert (4) is fixed on the movable mold seat plate (2), and is characterized in that a stripper plate (3) is further installed on the movable mold seat plate (2), a slide block (5) is installed on the stripper plate (3), the movable mold insert (4) penetrates through the stripper plate (3) and forms a mold cavity (6) together with the slide block (5) and the fixed mold insert (7), and a fixed-distance parting device is further installed on the mold;

the fixed-distance parting device comprises a stop block (11), the stop block (11) is fixed on the pushing plate (3), a first slide way (111) and a second slide way (112) are longitudinally formed in the stop block (11), a fixed die pull rod (12) is installed in the first slide way (111), the fixed die pull rod (12) is fixed on the fixed die, a limit groove (121) is formed in the fixed die pull rod (12), a first slide-in inclined surface (1211) and a positioning surface (1212) are respectively formed in two side walls of the limit groove (121), and a first guide slide-in inclined surface (122) is further formed at one end of the fixed die pull rod (12);

a movable die pull rod (13) is installed in the second slide way (112), the movable die pull rod (13) is fixed on the movable die base plate (2) through the tail of the movable die pull rod, a sliding groove (131) is formed in the middle of the movable die pull rod (13), a guide slide block (132) is formed at the head of the movable die pull rod (13), and a second slide-in inclined plane (1321) and a second slide-out inclined plane (1322) are respectively formed in the upper portion and the lower portion of one side face of the guide slide block (132);

the slide block is characterized in that a mounting groove (113) is transversely formed in the stop block (11), the mounting groove (113) is communicated with the first slide rail (111) and the second slide rail (112), a spring (14) is mounted in the mounting groove (113), one end of the spring (14) is fixed to the bottom of the mounting groove (113), the other end of the spring is connected with a limiting block (15), a third slide rail (151) is formed in the limiting block (15), a slide-out inclined surface (1511) and a second slide-in inclined surface (1512) which are matched with the slide guide block (132) are formed on the third slide rail (151), the slide groove (131) is located in the third slide rail (151) during die assembly, the head of the limiting block (15) is located in the limiting groove (121), and third slide-in inclined surfaces (152) and a locking surface are respectively formed on two sides of the head of the limiting block (15);

the fixed die further comprises a splitter plate (9) and two sets of hot runner systems (8), the sliding blocks (5) and the die cavities (6) are both provided with two sets, and molten plastic passes through the splitter plate (9) after being split and then enters the die cavities (6) through the hot runner systems (8).

2. The core-pulling ejection mechanism of the injection mold according to claim 1, characterized in that a limiting hole (21) is formed in the movable mold base plate (2), the limiting hole (21) is composed of a large hole and a small hole, the small hole is located at the upper part of the large hole, a step (211) is formed between the large hole and the small hole, a limiting screw (1) is arranged in the limiting hole (21), a cap head (101) of the limiting screw (1) is located in the large hole, and a rod part (102) of the limiting screw (1) penetrates through the small hole and is fixed at the bottom of the ejector plate (3).

3. The core pulling and ejecting mechanism of the injection mold according to claim 1, characterized in that the surface of the fixed mold insert (7) is provided with mold patterns (71).