CN210791899U

CN210791899U - Flow guide structure of valve needle in mold

Info

Publication number: CN210791899U
Application number: CN201921546227.0U
Authority: CN
Inventors: 陈祝君; 李维东
Original assignee: Zhangjiagang Tianjiang Precision Mould Co ltd
Current assignee: Zhangjiagang Tianjiang Precision Mould Co ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-06-19
Anticipated expiration: 2029-09-17

Abstract

The utility model discloses a can reduce the water conservancy diversion structure of needle in the mould of the pressure of needle when the shutoff is moulded plastics the mouth, include: the injection molding device comprises a nozzle main body, wherein a runner insert is arranged in the nozzle main body in a penetrating manner, an injection molding runner is arranged in the runner insert, a valve needle is arranged in the injection molding runner, a jet flow mounting body for mounting the nozzle main body is arranged in the mold, a mounting cavity with a large upper part and a small lower part is arranged in the jet flow mounting body, a jet flow channel communicated with a cavity is arranged on the bottom wall of the lower part of the mounting cavity, a lower flow guide channel communicated with the lower part of the mounting cavity and the jet flow channel is arranged, the nozzle main body is arranged in the mounting cavity, when the valve needle is inserted into the jet flow channel, the gap between the valve needle and the jet flow channel is gradually increased from bottom to top, and an upper. The water conservancy diversion structure of needle in the mould can be applicable in various injection mould.

Description

Flow guide structure of valve needle in mold

Technical Field

The utility model relates to a needle in the mould, concretely relates to water conservancy diversion structure of needle in mould.

Background

At present, because a valve needle in a traditional mold does not have a flow guide structure corresponding to the valve needle, in the actual working process, the valve needle bears very large pressure when blocking an injection molding opening, so that the valve needle cannot completely block the injection molding opening, the obtained product forms a flash close to the injection molding opening, and the flash needs to be manually cut off. Thus, on one hand, the workload of operators is increased, the production cost is increased, and on the other hand, the attractiveness of the whole product is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the flow guide structure of the valve needle in the mold can reduce the pressure of the valve needle in the process of blocking the injection molding opening.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a flow directing structure for a valve pin in a mold, comprising: the nozzle comprises a nozzle main body, wherein a runner insert is arranged in the nozzle main body in a penetrating manner, an injection runner is arranged in the runner insert, a valve needle is arranged in the injection runner, a jet flow mounting body for mounting the nozzle main body is arranged in the die, a mounting cavity with a large upper part and a small lower part is arranged in the jet flow mounting body, a jet flow channel communicated with the die cavity is arranged on the bottom wall of the lower part of the mounting cavity, at least two lower flow guide channels communicated with the lower part of the mounting cavity and the jet flow channel are arranged along the circumferential direction, the nozzle main body is arranged in the mounting cavity, when the valve needle is inserted into the jet flow channel, the gap between the valve needle and the jet flow channel is gradually increased from bottom to top, the lower end of the runner insert extends out of the nozzle.

As a preferable scheme, in the flow guide structure of the valve needle in the mold, four lower flow guide channels communicating the lower part of the mounting cavity with the jet flow channel are uniformly formed on the bottom wall of the lower part of the mounting cavity along the circumferential direction.

Preferably, in the flow guiding structure of the valve needle in the mold, the cross section of the lower flow guiding channel is in the shape of a sector of a folding fan.

As a preferable scheme, in the flow guiding structure of the valve needle in the mold, the runner insert is a beryllium copper runner insert.

The utility model has the advantages that: the utility model discloses a set up the water conservancy diversion structure at the mouth of moulding plastics to reduced the needle greatly and moulded plastics the pressure when mouthful, thereby can be with moulding plastics mouthful blocking up completely, the product that obtains is being close to the smooth no overlap of mouthful department of moulding plastics, makes the product very pleasing to the eye, moreover, has still alleviateed operation workman's work load, has improved production efficiency, has reduced manufacturing cost.

Drawings

Fig. 1 is a schematic structural view of a flow guiding structure of a valve needle in a mold of the present invention.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Fig. 3 is an enlarged schematic view of a portion B of fig. 2.

Fig. 4 is an enlarged schematic view of the jet flow installation body in the right-hand direction in fig. 1.

Fig. 5 is an enlarged schematic view of the jet flow arrangement of fig. 1.

Fig. 6 is a schematic top view of the structure of fig. 4.

The reference numerals in fig. 1 to 6 are: 1. the injection molding device comprises a mold, 11, a nozzle main body, 12, a cavity, 2, a flow channel insert, 21, an upper flow guide channel, 22, an injection flow channel, 3, a valve needle, 4, a jet flow arranging body, 41, an arranging cavity, 411, an upper part of the arranging cavity, 412, a lower part of the arranging cavity, 44, a lower flow guide channel, 45 and a jet flow channel.

Detailed Description

Referring to fig. 1 to 6, a detailed description is given of a specific embodiment of the flow guiding structure of the valve needle in the mold according to the present invention:

as shown in fig. 1, the utility model discloses a water conservancy diversion structure of needle in mould, include: a nozzle main body 11, a runner insert 2 made of beryllium copper is arranged in the nozzle main body 11 in a penetrating way, an injection runner 22 is arranged in the runner insert 2, a valve needle 3 is arranged in the injection runner 22, a jet flow mounting body 4 for mounting the nozzle main body 11 is arranged in the mould 1, as shown in fig. 4 and 5, a mounting cavity 41 with a large upper part and a small lower part (a mounting cavity upper part 411 is large, a mounting cavity lower part 412 is small) is arranged in the jet mounting body 4, a jet channel 45 communicated with the cavity 12 in the die 1 is arranged on the bottom wall of the mounting cavity lower part 412-as shown in fig. 4, 5 and 6, four lower diversion channels 44 communicated with the mounting cavity lower part 412 and the jet channel 45 are uniformly arranged on the bottom wall of the mounting cavity lower part 412 along the circumferential direction-as shown in fig. 4, 5 and 6, and the cross section of the lower diversion channel 44 is in the shape of a fan-shaped fan-as shown in fig. 6; the nozzle body 11 is disposed in the mounting cavity 41, and when the needle 3 is inserted into the jet flow channel 45, the gap between the needle 3 and the jet flow channel 45 is gradually increased from bottom to top-see fig. 2, and the lower end of the runner insert 2 protrudes from the nozzle body 11 and is circumferentially and uniformly provided with at least two (the specific number is determined according to actual conditions) upper diversion channels 21-see fig. 3 for connecting the lower part 412 of the mounting cavity and the injection runner 22.

The utility model discloses a working process does: when the valve needle 3 blocks the flow plastic opening (the connection part of the jet flow channel 45 and the cavity 12), because the backflushing fluid generated by the blocking of the valve needle 3 flows to the gap between the valve needle 3 and the injection flow channel 22 through the gap between the valve needle 3 and the jet flow channel 45, the lower flow guide channel 44 and the upper flow guide channel 21, the pressure during the blocking is greatly reduced, so that the injection opening can be completely blocked, and the generation of flash is avoided.

In summary, the present invention is only a preferred embodiment, and is not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the shapes, structures, features and spirit of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A flow directing structure for a valve pin in a mold, comprising: nozzle main part wears to be equipped with the runner mold insert in the nozzle main part, has seted up the runner of moulding plastics in the runner mold insert, is provided with needle, its characterized in that in the runner of moulding plastics: the injection molding die is characterized in that a jet flow mounting body for mounting a nozzle main body is arranged in the die, a mounting cavity with a large upper part and a small lower part is arranged in the jet flow mounting body, a jet flow channel communicated with the die cavity is formed in the bottom wall of the lower part of the mounting cavity, at least two lower flow guide channels communicated with the lower part of the mounting cavity and the jet flow channel are formed in the circumferential direction, the nozzle main body is arranged in the mounting cavity, when a valve needle is inserted into the jet flow channel, the gap between the valve needle and the jet flow channel is gradually increased from bottom to top, the lower end of the flow channel insert extends out of the nozzle main body, and at least two upper flow guide channels.

2. The structure of claim 1, wherein four lower flow guide channels are uniformly formed on the bottom wall of the lower portion of the mounting cavity along the circumferential direction, the lower flow guide channels communicating the lower portion of the mounting cavity with the jet flow channel.

3. The structure of claim 1, wherein the cross section of the lower diversion channel is a sector of a fan.

4. The flow guiding structure of the valve needle in the mold according to claim 1, 2 or 3, wherein the runner insert is a beryllium copper runner insert.