CN218803741U

CN218803741U - A runner structure, mould structure and assembly toy for cold runner is moulded plastics

Info

Publication number: CN218803741U
Application number: CN202223268892.2U
Authority: CN
Inventors: 封云; 赵家亮; 张永灿; 邓善军
Original assignee: Shanghai Brooke Building Block Technology Co ltd
Current assignee: Shanghai Brooke Building Block Technology Co ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-04-07
Anticipated expiration: 2032-12-06

Abstract

The utility model provides a runner structure, mould structure and assembly toy for cold runner is moulded plastics, include: molding cavity: for forming a product; a first layer of cold runners: is communicated with the cavity; second-layer cold runner: and the first cold layer runner and the cavity are arranged at intervals and are respectively communicated with the first cold layer runner and/or the cavity. Through communicating first layer cold runner with the die cavity, set up second layer cold runner and first layer cold runner and die cavity interval and communicate with first layer cold runner or die cavity respectively through connecting channel, can place the access point of second layer cold runner in the place of the arbitrary glue difficulty of walking of first layer cold runner, thereby realize reducing the purpose of injection pressure, help shortening the mould repair time of mould, make the product outward appearance trend unanimous, assembly dimension is stable, help improving product quality.

Description

A runner structure, mould structure and assembly toy for cold runner is moulded plastics

Technical Field

The utility model relates to a cold runner technique of moulding plastics specifically relates to a runner structure, mould structure and assembly toy for cold runner is moulded plastics.

Background

In the production of the assembly toy, a cold runner injection molding technology is often adopted. Cold runner injection molding refers to a portion between a mold inlet and a product gate, wherein plastic is kept in a flowing state in a runner by injection pressure and heat of the plastic, and the runner is used as a part of molding materials, but does not belong to a product.

Chinese patent application publication No. CN114603776a discloses an injection mold and an injection molding method, wherein the injection mold comprises: the plastic product forming die comprises a die cavity, a first die cavity and a second die cavity, wherein the die cavity is used for forming a plastic product and is provided with a first end and a second end, and the die cavity is bent or bent and extended from the first end to the second end; the cold runner is at least respectively communicated with the first end and the second end, or the cold runner is at least respectively communicated with the positions, close to the first end and the second end, of the cavity; a support structure in the cold runner for forming a support for the plastic product. The injection molding method comprises the following steps: preparing an injection mold; injecting the plastic solution into a cold runner and conveying the plastic solution to the cavity from the cold runner; the plastic solution in the cavity is cooled to a normal temperature state to form a plastic product, the plastic solution in the cold runner is cooled to a normal temperature state to form a support structure, and the support structures are respectively connected to different positions of the plastic product; the support structure is cut apart from the plastic product.

In the prior art, a cold runner injection mold only has one layer of runner, after plastic solution is injected into the cold runner, a product at the near end of an injection molding port is easy to have a mantle due to over-pressure maintaining, and a product at the far end of the injection molding port is easy to form surface shrinkage due to difficult pressure transmission, so that a part to be improved exists.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing a runner structure, mould structure and assemble toy for cold runner is moulded plastics.

According to the utility model provides a pair of runner structure for cold runner is moulded plastics, include: molding cavity: for forming a product; a first layer of cold runners: is communicated with the cavity; second-layer cold runner: and the first layer cold runner and the cavity are arranged at intervals and are respectively communicated with the first cold layer runner and/or the cavity.

Preferably, the second-layer cold runner comprises a main runner and a branch runner, the main runner is communicated with the water gap, and the branch runner is communicated with the main runner; and a communicating runner communicated with the first layer cold runner or the cavity is arranged on the branch runner.

Preferably, the main flow channel comprises a linear flow channel and/or a curved flow channel, and the branch flow channel comprises a linear flow channel and/or a curved flow channel.

Preferably, the second layer cold runner is provided with a branch runner, and a runner section adjusting part is arranged on the main runner and/or the branch runner communicated with the branch runner.

Preferably, the runner section adjusting part comprises a throttle valve, a thread mounting hole is formed in the second-layer cold runner, the throttle valve comprises a thread part, the thread part of the throttle valve is installed in a thread fit mode with the thread mounting hole, and one end of the throttle valve is inserted into the second-layer cold runner.

Preferably, one end of the throttling valve, which is positioned outside the second laminar cooling runner, comprises a hexagonal boss or a hexagonal groove.

According to the utility model provides a pair of a mould structure for cold runner is moulded plastics, still include the template, the two setting of die cavity and first layer cold runner is in same side of template, the setting of second layer cold runner is in the another side of template.

Preferably, the side surface of the template provided with the second layer cold runner is provided with a blowing valve.

Preferably, the mold plate is provided with a threaded air receiving hole, the air blowing valve comprises a threaded portion, the threaded portion of the air blowing valve is in threaded fit with the threaded air receiving hole, and an air outlet of the air blowing valve protrudes out of the mounting side face of the mold plate.

A construction toy includes a plurality of movable members.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a with first layer cold runner and die cavity intercommunication, set up second floor cold runner and first layer cold runner and die cavity interval and communicate with first layer cold runner or die cavity respectively through connecting channel, can place the entrance point of second floor cold runner in the place of the arbitrary glue difficulty of walking of first layer cold runner, thereby realize reducing injection pressure's purpose, help shortening the mould time of repairing of mould, make product appearance trend unanimous, assembly size is stable, help improving product quality.

2. The utility model discloses a be located the outside one end of second floor cold runner at the choke valve and set up hexagonal boss or hexagonal recess, when needs are to the balance of fine setting runner, use hexagonal key cooperation hexagonal boss or hexagonal recess corotation or reversal throttle valve, the choke valve is under the guide of screw thread, stretch into or stretch out second floor cold runner, the regulation to second floor cold runner sectional area has been realized, and can realize not needing the lower mould can realize fine setting runner balance with ordinary instrument on the board, reach the purpose of realizing fast and stabilizing the moulding plastics.

3. The utility model discloses a be provided with the side-mounting gas blast valve of second floor cold runner at the template, the tiny dust that produces when can preventing second floor cold runner from breaking away from the crochet hook gets into second floor cold runner and is taken into the die cavity, helps improving the quality of product.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is an overall schematic view of the flow channel structure of the present invention;

FIG. 2 is a schematic view of the throttle valve mounting structure of the present invention;

FIG. 3 is a schematic view of the overall structure of the throttle valve of the present invention;

fig. 4 is a schematic view of the overall structure of the main embodiment of the present invention.

Reference numerals are as follows:

first layer cold runner 1 cavity 3

Second laminar cold runner 2 nozzle 4

Main runner 21 throttle valve 5

Branch flow passage 22 template 6

Communication flow passage 23 blow valve 7

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will aid those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one of ordinary skill in the art without departing from the spirit of the invention. All of which belong to the protection scope of the present invention.

As shown in fig. 1, according to the utility model provides a runner structure for cold runner is moulded plastics, including die cavity 3, first layer cold runner 1 and second floor cold runner 2. The die cavity 3 is used for the shaping product, and first layer cold runner 1 communicates with die cavity 3, and second floor cold runner 2 communicates with mouth of a river 4, and second floor cold runner 2 is the interval with first layer cold runner 1 and die cavity 3 two and sets up, and second floor cold runner 2 communicates respectively with first layer cold runner 1 and/or die cavity 3.

Specifically, the second layer cold runner 2 is of an integrally formed structure, the second layer cold runner 2 includes a main runner 21 and a branch runner 22, the main runner 21 is communicated with the water gap 4, the branch runner 22 is communicated with the main runner 21, and the branch runner 22 is provided with a communication runner 23 communicated with the first layer cold runner 1 or the cavity 3. It should be noted that the communication flow passage 23 may also be provided on the main flow passage 21 for communicating the main flow passage 21 with the first-layer cold flow passage 1 or the cavity 3. The branch runner 22 and the communicating runner 23 can place the inlet point of the second layer cold runner 2 at any place of the first layer cold runner 1 where glue is difficult to flow, so that the purpose of reducing injection molding pressure is achieved.

The main flow path 21 includes a straight flow path and/or a curved flow path, and the branch flow path 22 includes a straight flow path and/or a curved flow path. The shapes of the main runner 21 and the branch runners 22 can be specifically designed according to actual injection molding conditions and distribution of the cavities 3, the second-layer cold runner 2 is provided with branch runners, and runner section adjusting parts are arranged on the main runner 21 and/or the branch runners 22 communicated with the branch runners. An adjusting part capable of changing the cross-sectional area of the runner is arranged near the branch of the second laminar cold runner 2, so that the balance of the runner can be finely adjusted. Specifically, the flow channel section adjusting part needs to extend into the flow channel to change the sectional area of the flow channel, so that the flow channel section adjusting part can be circular or flaky.

As shown in fig. 1, 2 and 3, more specifically, the flow path section adjusting part includes a throttle valve 5, a threaded mounting hole is provided on the second cold layer flow path 2, the throttle valve 5 includes a threaded portion, the threaded portion of the throttle valve 5 is installed in threaded fit with the threaded mounting hole, and one end of the throttle valve 5 protrudes into the second cold layer flow path 2. Further, one end of the throttling valve 5 located outside the second laminar cooling flow passage 2 includes a hexagonal boss or a hexagonal groove. When the balance of the fine adjustment flow channel is needed, the hexagonal key can be used to be matched with the hexagonal boss or the hexagonal groove to rotate forward or reversely by the throttle valve 5, and the throttle valve 5 extends into or out of the second cold layer flow channel 2 under the guidance of the threads, so that the purpose of adjusting the sectional area of the second cold layer flow channel 2 is achieved.

And the flow channel can be finely adjusted by using a common tool on the machine table without a lower die, so that the purpose of quickly and stably injecting the plastic is achieved.

As shown in fig. 1 and 4, the present embodiment further provides a mold structure for cold runner injection molding, which includes the above runner structure for cold runner injection molding, and further includes a mold plate 6, and the runner structure is integrated on the mold plate 6. Specifically, the cavity 3 and the first layer cold runner 1 are both disposed on the same side of the mold plate 6, and the second layer cold runner 2 is disposed on the other side of the mold plate 6.

Because in the production process, because of back-off crochet hook draws mouth of a river 4 on the second floor cold runner 2, second floor cold runner 2 leads to there being tiny dust to appear when breaking away from the crochet hook, in order to avoid the tiny particle dust to get into second floor cold runner 2 to being taken into the die cavity 3, set up the side-mounting of second floor cold runner 2 on the template 6 and have blowoff valve 7.

Furthermore, a threaded air receiving hole is formed in the template 6, the air blowing valve 7 comprises a threaded portion, the threaded portion of the air blowing valve 7 is installed in threaded fit with the threaded air receiving hole, and an air outlet of the air blowing valve 7 protrudes out of the installation side face of the template 6.

This embodiment provides a construction toy again, and construction toy adopts above-mentioned cold plastic mold injection moulding, includes a plurality of movable parts.

Through the design of the first layer of cold runner 1 and the second layer of cold runner 2, combined with the analysis of mould flow software and the verification of actual production, compared with the traditional structure, the injection pressure can be reduced by about thirty percent, so that the mould repairing time of the mould is shortened, the product appearance tends to be consistent, and the assembly size is stable.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, are not to be construed as limiting the present application.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the essential spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A runner structure for cold runner injection molding, comprising:

cavity (3): for forming a product;

first layer cold runner (1): is communicated with the cavity (3);

second laminar cold runner (2): is communicated with the water gap (4), is arranged at intervals with the first layer cold runner (1) and the cavity (3), and is respectively communicated with the first layer cold runner (1) and/or the cavity (3).

2. Runner structure for cold runner injection molding according to claim 1, wherein the second laminar cold runner (2) comprises a main runner (21) and a branch runner (22), the main runner (21) communicating with the gate (4), the branch runner (22) communicating with the main runner (21);

and a communicating runner (23) communicated with the first layer cold runner (1) or the cavity (3) is arranged on the branch runner (22).

3. A runner structure for cold runner injection molding according to claim 2, wherein said main runner (21) includes a straight runner and/or a curved runner, and said branch runner (22) includes a straight runner and/or a curved runner.

4. The runner structure for cold runner injection molding according to claim 2, wherein the second layer cold runner (2) is formed with a branch runner, and a runner section adjusting part is provided on a main runner (21) and/or a branch runner (22) communicating with the branch runner.

5. The runner structure for cold runner injection molding according to claim 4, wherein the runner section adjusting part comprises a throttle valve (5), a threaded mounting hole is provided on the second layer cold runner (2), the throttle valve (5) comprises a threaded portion, the threaded portion of the throttle valve (5) is installed in threaded fit with the threaded mounting hole, and one end of the throttle valve (5) protrudes into the second layer cold runner (2).

6. A runner structure for cold runner injection molding as claimed in claim 5, wherein an end of said throttle valve (5) located outside the second-layer cold runner (2) includes a hexagonal boss or a hexagonal recess.

7. A mold structure for cold runner injection molding, characterized in that the runner structure for cold runner injection molding of any one of claims 1 to 6 is adopted, and further comprises a mold plate (6), wherein the mold cavity (3) and the first layer cold runner (1) are both arranged on the same side surface of the mold plate (6), and the second layer cold runner (2) is arranged on the other side surface of the mold plate (6).

8. The mold structure for cold runner injection molding according to claim 7, wherein the side of the mold plate (6) on which the second laminar cold runner (2) is provided with a blow valve (7).

9. The mold structure for cold runner injection molding according to claim 8, wherein the mold plate (6) is formed with a threaded air receiving hole, the air blow valve (7) comprises a threaded portion, the threaded portion of the air blow valve (7) is installed in threaded fit with the threaded air receiving hole, and the air outlet of the air blow valve (7) protrudes from the installation side surface of the mold plate (6).

10. A block toy, characterized in that it is injection-molded using the runner structure for cold runner injection molding according to any one of claims 1 to 6, comprising a plurality of movable parts.