CN114434746A

CN114434746A - Flow passage structure

Info

Publication number: CN114434746A
Application number: CN202011229414.3A
Authority: CN
Inventors: 董昌鑫
Original assignee: Suzhou Mitac Precision Technology Co Ltd
Current assignee: Suzhou Mitac Precision Technology Co Ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2022-05-06

Abstract

The invention relates to the technical field of injection molds, in particular to a flow channel structure. The flow channel structure includes: a main flow channel; a branch channel branching from the main channel; the branch flow channel is branched along the branch flow channel and comprises a straight branch flow channel and an ox horn flow channel, and the ox horn flow channel is communicated with a cavity of the mold to feed glue into the cavity; the cold trough is arranged at the straight branch flow channel, the length direction of the cold trough is perpendicular to the straight branch flow channel, and the depth direction of the cold trough extends downwards along the straight branch flow channel. According to the flow channel structure, in the injection molding process, the injection-molded cold material enters the cold material groove along with the filling pressure and is deposited at the bottom of the cold material groove, so that the cold material cannot enter a cavity of a mold to cause poor surface gloss or spray lines of a molded product, the molded product has good appearance and high yield because the molded product does not have the cold material.

Description

Flow passage structure

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of injection molds, in particular to a flow channel structure.

[ background of the invention ]

In injection molding, the temperature of the resin is generally lowered as appropriate at the nozzle tip portion in order to prevent the molten resin from flowing out of the hole of the nozzle tip, and therefore, the initial portion of the resin injected into the mold becomes a solidified or semi-solidified resin, which is called a cold material.

The cold material can show poor gloss or jet lines on the surface of a molded product, so that the cold material mark on the surface of the molded product is obvious, and the defective rate in injection molding production is high.

In view of the above, it is necessary to develop a flow channel structure to solve the problem of obvious cold traces on the surface of the molded product.

[ summary of the invention ]

Accordingly, an object of the present invention is to provide a flow path structure capable of solving the problem of poor appearance of a molded product due to cold charge filling.

In order to achieve the purpose, the invention adopts the following technical scheme:

a runner structure for use in a mold, the runner structure comprising:

a main flow channel;

a branch channel branching from the main channel;

the branch flow channel is branched along the branch flow channel and comprises a straight branch flow channel and an ox horn flow channel, and the ox horn flow channel is communicated with a cavity of the mold to feed glue into the cavity;

the cold trough is arranged at the straight branch flow channel, the length direction of the cold trough is perpendicular to the straight branch flow channel, and the depth direction of the cold trough extends downwards along the straight branch flow channel.

Furthermore, an insert is arranged in the core insert of the mold, the straight branch flow channel and the cold material groove are arranged on the core insert and the insert, and the ox horn flow channel is arranged on the insert.

Furthermore, one end of the insert is provided with a hanging table which is clamped in the male die core.

Furthermore, the cold trough is an elliptical trough, and the width of an opening at the upper end is larger than that of the opening at the lower end.

Further, the length of the cold trough is 1.5-2 times of the diameter of the straight branch runner.

Furthermore, the mold is a mold with two cavities, two branch runners branch from the main runner, and a branch runner branches from each branch runner.

Compared with the prior art, the flow channel structure has the advantages that the cold material groove is formed in the straight branch flow channel, in the injection molding process, the injection-molded cold material enters the cold material groove along with the filling pressure and is deposited at the bottom of the cold material groove, so that the cold material cannot enter a cavity of a mold to cause poor surface gloss or spray lines of a molded product, the molded product has good appearance due to the absence of the cold material, and the yield is high.

[ description of the drawings ]

Fig. 1 is a schematic view of a runner structure in a mold according to the present invention.

Fig. 2 is a partially enlarged view of fig. 1.

Fig. 3 is a top view of fig. 1.

Fig. 4 is a schematic assembly view of the molded article after molding the flow channel structure of the present invention.

Fig. 5 is an exploded view of the molded article formed by the flow channel structure of the present invention.

Fig. 6 is a schematic diagram illustrating the flow channel excess material after the formed product is formed by the flow channel structure of the present invention.

FIG. 7 is a schematic diagram of an insert in a flow channel structure according to the present invention.

[ detailed description ] embodiments

For a further understanding of the objects, technical effects and technical means of the present invention, reference will now be made in detail to the following description taken in conjunction with the accompanying drawings.

Referring to fig. 1 to 3, fig. 1 is a schematic view illustrating a runner structure of the present invention in a mold, fig. 2 is a partially enlarged schematic view of fig. 1, and fig. 3 is a top view of fig. 1.

The invention relates to a flow passage structure, which is applied to a mould, wherein the mould comprises a male mould core 10 and a female mould core, the male mould core 10 and the female mould core form a cavity corresponding to a molded product 30, the cavity is used for molding the molded product 30, and the flow passage structure comprises:

a main runner connected to the nozzle, wherein the resin flows into the main runner from the nozzle, in order to more clearly understand the runner structure, the cavity is not shown in fig. 1 and 3, and the main runner is mainly disposed on the cavity, so the main runner is not shown in fig. 1 and 3, but the flow runner excess diagram in fig. 6 can be referred to, and the main runner excess 205 in the flow runner excess 20 in fig. 6 corresponds to the main runner structure;

a sub-runner 100 branching off along the main runner from which the resin flows into the sub-runner 100;

the branch runner 101 branches along the branch runner 100, the branch runner 101 comprises a straight branch runner 102 and a horn runner 103, the horn runner 103 is communicated with a cavity of a mold to feed glue into the cavity, and the horn runner 103 is suitable for forming a formed product needing latent glue feeding;

the cold trough 104 is arranged at the straight branch flow channel 102, the length direction of the cold trough 104 is perpendicular to the straight branch flow channel 102, and the depth direction of the cold trough 104 extends downwards along the straight branch flow channel 102.

Fig. 7 is a schematic view of an insert in the flow channel structure according to the present invention. The male die core 10 of the die is provided with the insert 11, the straight branch flow channel 102 and the cold trough 104 are arranged on the male die core 10 and the insert 11, and the ox horn flow channel 103 is arranged on the insert 11, so that the insert 11 is convenient to replace, and a part of the die core is convenient to repair the die. In order to firmly arrange the insert 11 in the core insert 10, one end of the insert 11 is provided with a hanging table 12, and the hanging table 12 is clamped in the core insert 10.

Referring to fig. 5 and fig. 6, fig. 5 is an exploded view of the molded product with a flow channel structure of the present invention, and fig. 6 is a schematic view of the remainder of the flow channel after the molded product with a flow channel structure of the present invention. The runner remainder 20 corresponds to the runner structure, that is, the runner remainder 20 comprises a main runner remainder 205, a sub-runner remainder 200, a cold trough remainder 204, a straight runner remainder 202 and a horn runner remainder 203, the runner remainder 200 can clearly show the specific structure of the runner structure, as shown in fig. 5 and 6, the cold trough 104 is an elliptical trough, and the width of the upper opening is greater than that of the lower opening, so that the cold trough 104 can be conveniently released from the mold; the length of the cold sink 104 is 1.5 to 2 times the diameter of the straight branch flow channel, so that the cold can completely enter the cold sink 104, and further the cold can be prevented from entering the cavity to mold the molded product 30.

In the present embodiment, the mold is a mold with two cavities, that is, two identical molded products 30 are molded simultaneously, the main runner is perpendicular to the branch runners 100, so that two branch runners 100 branch off in two opposite directions along the main runner, and each branch runner 100 branches off one branch runner 101.

Fig. 4 is a schematic view showing the assembly of the molded product with the flow channel structure according to the present invention. When the molded product 30 is molded, after the resin flows through the main runner and the branch runner 100 from the nozzle, in the branch runner 101, the cold material in the injection molding resin enters the cold material groove 104 along with the filling pressure and is precipitated at the bottom of the cold material groove 104, but the cold material resin enters the cavity to mold the molded product 30 after passing through the ox horn runner 103, so that the cold material does not enter the cavity of the mold to cause poor surface gloss or jet marks on the molded product 30.

In summary, in the flow channel structure of the present invention, the cold material groove 104 is disposed at the straight branch flow channel 102, during the injection molding process, the cold material enters the cold material groove 104 along with the filling pressure and deposits at the bottom of the cold material groove 104, so that the cold material does not enter the cavity of the mold to cause poor surface gloss or spray lines on the molded product 30, the molded product 30 has good appearance and high yield because it does not have the cold material.

The technical principles of the present invention have been described above in connection with specific embodiments, which are intended to explain the principles of the present invention and should not be construed as limiting the scope of the present invention in any way. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims

1. A runner structure for use in a mold, the runner structure comprising:

a main flow channel;

a branch channel branching from the main channel;

2. The runner structure of claim 1, wherein the core insert of the mold is provided with an insert, the straight branch runner and the cold material groove are disposed on the core insert and the insert, and the ox horn runner is disposed on the insert.

3. The flow channel structure of claim 2, wherein one end of the insert has a hanging platform, and the hanging platform is clamped in the core insert.

4. The flow channel structure according to claim 1, wherein the cooling trough is an elliptical trough, and the upper end opening width is larger than the lower end width.

5. The flow channel structure according to claim 1, wherein the length of the cooling channel is 1.5 to 2 times the diameter of the straight branch flow channel.

6. The runner structure of claim 1 wherein the mold is a two-part mold having two runners branching off along the main runner, each of the runners branching off a branch runner.