CN217704500U

CN217704500U - Multi-cavity injection molding structure adopting cold and hot runner injection molding

Info

Publication number: CN217704500U
Application number: CN202221502733.1U
Authority: CN
Inventors: 杨松; 黄小鹏; 陈海滨; 李将为
Original assignee: Dongguan Haorun Precision Electronic Co ltd
Current assignee: Dongguan Haorun Precision Electronic Co ltd
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2022-11-01
Anticipated expiration: 2032-06-16

Abstract

The utility model relates to an adopt many caves injection structure that cold and hot runner was moulded plastics, including constructing hot runner, cold runner and a plurality of molding chamber on the mould, the hot runner is assembled with the cold runner and is located to add the transition runner, and this transition runner is from the hot runner and the cold runner assemble the department towards not equidirectional extension and have two at least symmetrical structure bodies that extend end, and every extension end of transition runner corresponds and connects a molding chamber, realizes that hot runner and cold runner inject into the liquid of moulding plastics respectively and get into the molding chamber after on average in the transition runner. The utility model discloses can improve the filling effect of the liquid of moulding plastics, realize that the product packing of each shaping chamber tends to unanimity, reduced the residual stress that plastic products produced because of heat-conduction is inhomogeneous to improve the quality of product greatly, be favorable to improving injection efficiency and quality. Through the utility model discloses, can satisfy the plastic product well and fill rapid and even requirement in high-speed injection moulding technology.

Description

Multi-cavity injection molding structure adopting cold and hot runner injection molding

Technical Field

The utility model belongs to the technical field of the injection mold technique and specifically relates to a mould structure of adopting cold and hot runner to mould plastics is related to.

Background

With the continuous improvement of the quality of life and the development of the plastic industry, plastic products are applied to various fields of life and production, and the requirements on the shapes of the plastic products are continuously improved. The plastic product is mainly formed by injection molding through an injection mold, the existing injection mold mostly adopts an injection molding structure of a full hot runner and a full cold runner, the full hot runner structure occupies large mold space, the number of mold cavities of the mold is limited, and meanwhile, the mode of one cavity at a time greatly increases the mold cost, and the plastic product has high cost and small yield; the full cold runner structure product has long material opening, influences the transparency of plastic products, has more injection molding waste materials, is slow in product forming, is difficult to improve the quality, and has more complex injection molding steps and long mold cycle. Subsequently, a multi-cavity injection molding form adopting hot and cold runner injection molding is adopted, but the temperature and viscosity of the diameter section of the runner formed by injecting the hot nozzle are distributed in a fan shape, and two injection molding liquids, namely hot injection liquid and cold injection liquid, are directly injected into the mold cavity together, so that the cold runner and the hot runner are not easy to balance, the product molding is unstable, particularly, the consistency ratio of the multi-cavity injection molding product is poor, and the injection molding efficiency and quality are influenced.

Disclosure of Invention

An object of the utility model is to provide an adopt many caves injection structure that cold and hot runner was moulded plastics, solve above-mentioned technical problem well, make the runner reach balanced state, each die cavity product is filled and is tended to unanimous, improves injection molding efficiency and quality.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the multi-cavity injection molding structure comprises a hot runner, a cold runner and a plurality of molding cavities, wherein the hot runner, the cold runner and the molding cavities are constructed on a mold, a transition runner is additionally arranged at the convergence position of the hot runner and the cold runner, the transition runner is a symmetrical structure body which extends from the convergence position of the hot runner and the cold runner to different directions and is provided with at least two extending tail ends, each extending tail end of the transition runner is correspondingly connected with one molding cavity, and injection molding liquid respectively injected into the hot runner and the cold runner enters the molding cavities after being averaged in the transition runner.

The above scheme is further that the transition runner is S-shaped, the S-shaped direction is adjustable, the transition runner is of a split structure through the left regulating block and the right regulating block, the split edges of the two regulating blocks are S-shaped edges, each transition runner is provided with two extending tail ends, the forming cavities are symmetrically arranged around the geometric center of the transition runner, and the geometric center of the transition runner is a convergence point of the hot runner and the cold runner.

The scheme is further that the part of the hot runner connected with the transition flow passage is designed to be a V-shaped hot nozzle.

The utility model discloses use the transition runner of symmetry physique for the hot runner reaches balanced state with the cold and hot two strands that cold runner was injected into separately behind the liquid of moulding plastics on average, improves the filling effect of the liquid of moulding plastics, realizes that the product packing of each shaping chamber tends to unanimity, has reduced plastic products because of the non-uniform residual stress who produces of heat-conduction, thereby has improved the quality of product greatly, is favorable to improving injection molding efficiency and quality. Through the utility model discloses, can satisfy the plastic product well and fill rapid and even requirement in high-speed injection moulding technology.

Description of the drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of a part of the mold structure of the present invention;

FIG. 3 is a schematic view of the top view structure of the local flow channel of the present invention;

FIG. 4 is an enlarged schematic view A shown in FIG. 1;

fig. 5 is an enlarged schematic view of B shown in fig. 1.

The specific implementation mode is as follows:

the conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Referring to fig. 1, 2, 3, 4, 5, it is that the utility model discloses a preferred embodiment is illustrated the intention, the utility model relates to an adopt many caves injection structure that cold and hot runner was moulded plastics, hot runner 1, cold runner 2 and a plurality of shaping chamber 3 on constructing the mould, hot runner 1 and cold runner 2 assemble the department and add transition runner 4, and this transition runner 4 is from hot runner 1 and cold runner 2 assemble the department towards not equidirectional extension and have two at least symmetrical structure that extend terminal, and every extension end of transition runner 4 corresponds and connects a shaping chamber 3, realizes that the liquid of moulding plastics that hot runner 1 and cold runner 2 pour into respectively gets into shaping chamber 3 after on average in transition runner 4. The transition flow passage 4 has the function of averagely cooling the injection molding liquid of the cold and hot strands, and leads the injection molding liquid to enter the molding cavity 3, thus solving the defect caused by the fact that the injection molding liquid of the traditional cold and hot strands immediately enters the molding after colliding.

Referring to fig. 1, 2, 3, 4 and 5, in the embodiment, the transition flow channel 4 is designed to be S-shaped, so that the structure is simple and effective, and the functions of averagely cooling and heating two injection molding liquids and the effect of gradually cooling the injection molding liquids can be satisfied. In this embodiment, this transition runner 4 is through controlling two 5 amalgamation structures of regulating block, the amalgamation limit of two regulating blocks 5 is the S-shaped limit, two regulating blocks 5 assemble the mould body through modes such as screws on, the amalgamation interval is the width of transition runner 4, adjustable different width satisfies the actual production needs, help on average cold and hot two strands of liquid of moulding plastics, moreover, the steam generator is simple in structure, convenient preparation and equipment, and can be as shown in figure 3, 4 shows, two regulating blocks 5 of regulating block of accessible adjustment change the S-shaped direction, can do benefit to the mould and arrange the production of moulding plastics of many caves like this, promote injection molding efficiency. Each transition runner 4 of this embodiment has two to extend terminally, and the geometric centre symmetry that becomes die cavity 3 around transition runner 4 sets up, and this transition runner 4's geometric centre is the convergent point of hot runner 1 and cold runner 2, is favorable to moulding plastics equilibrant, improves the filling effect of the liquid of moulding plastics, realizes that the product filling of each die cavity tends to unanimity. In this embodiment, the portion of the hot runner 1 connected to the transition flow channel 4 is designed as a V-shaped hot nozzle 11, which increases the injection pressure and ensures the fluidity and balance in the transition flow channel 4.

The utility model discloses use the transition runner of symmetry physique, satisfy many caves and mould plastics to make hot runner and cold runner separately inject into the cold and hot two strands of liquid of moulding plastics and reach balanced state after on average, improve the filling effect of the liquid of moulding plastics, realize that the product of each shaping chamber is filled and tends to unanimity, reduced plastic products because of the residual stress that heat-conduction inhomogeneous produces, thereby improved the quality of product greatly, be favorable to improving injection molding efficiency and quality. Through the utility model discloses, can satisfy the plastic product well and fill rapid and even requirement in high-speed injection moulding technology.

Of course, the present invention has been described in detail with reference to the embodiments, and only for the purpose of illustrating the technical conception and the features of the present invention, the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and implement the same, therefore, all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. Adopt many caves of cold and hot runner injection moulding structure, including hot runner (1), cold runner (2) and a plurality of molding cavity (3) of being constructed on the mould, its characterized in that: the transition runner (4) is additionally arranged at the convergence part of the hot runner (1) and the cold runner (2), the transition runner (4) extends towards different directions from the convergence part of the hot runner (1) and the cold runner (2) and is provided with at least two symmetrical structural bodies with extending tail ends, each extending tail end of the transition runner (4) is correspondingly connected with one forming cavity (3), and injection molding liquid respectively injected into the hot runner (1) and the cold runner (2) averagely enters the forming cavities (3) in the transition runner (4).

2. The multi-cavity injection molding structure adopting cold and hot runner injection molding according to claim 1, characterized in that: transition runner (4) are the S-shaped, and the S-shaped direction is adjustable, and this transition runner (4) is through controlling two regulating blocks (5) amalgamation structures, and the amalgamation limit of two regulating blocks (5) is the S-shaped limit, and each transition runner (4) has two to extend terminally, and shaping chamber (3) set up around the geometric centre symmetry of transition runner (4), and the geometric centre of this transition runner (4) is the convergent point of hot runner (1) and cold runner (2).

3. The multi-cavity injection molding structure adopting cold and hot runner injection molding according to claim 1, characterized in that: the hot runner (1) is connected with the transition flow passage (4) and is designed into a V-shaped hot nozzle (11).