CN210634050U

CN210634050U - Needle valve type hot runner injection mold

Info

Publication number: CN210634050U
Application number: CN201921509600.5U
Authority: CN
Inventors: 尹旺; 叶阿发
Original assignee: Zhangzhou Hongxingtai Electronics Co ltd
Current assignee: Zhangzhou Hongxingtai Electronics Co ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-05-29
Anticipated expiration: 2029-09-11

Abstract

The utility model relates to the technical field of injection molds, in particular to a needle valve type hot runner injection mold, which comprises an upper mold, wherein the top of the upper mold is provided with a cylinder assembly, the cylinder assembly is fixedly arranged on the upper mold, four corners of the bottom of the upper mold are fixedly provided with guide posts, the bottom of the guide posts is provided with a lower mold, the guide posts are inserted in the lower mold, and is connected with the lower die in a sliding way, the top of the lower die is fixedly provided with a valve needle seat, the extension of the four corners of the valve needle seat is provided with ejector rods, the four ejector rods are all fixedly arranged on the lower die, the bottom of the upper die is provided with a valve needle assembly, the valve needle assembly comprises a valve needle, the top end of the valve needle is provided with a cylinder piston, the cylinder piston is fixedly connected with the valve needle, the cylinder piston is clamped in the upper die, and with last mould sliding connection, the top outside of needle is equipped with the needle cover of valve, and the fixed joint of needle cover is in the outside of needle, and the inboard card of needle cover of valve is equipped with stores up gluey groove. The utility model discloses a practicality is strong, is worth promoting.

Description

Needle valve type hot runner injection mold

Technical Field

The utility model relates to an injection mold technical field especially relates to a needle valve formula hot runner injection mold.

Background

At present at the trade of moulding plastics generally adopt hot runner mold, closed hot runner system is more and more popular, but in current closed hot runner system's needle valve system, needle and needle cover cooperation precision requirement is very high, if the fitting surface has any scratch in the production process, lead to the system to leak easily, therefore need change needle and needle cover, in addition, regarding the cooperation degree requirement of needle and needle cover, generally to the cooperation of conventional injection moulding processing design needle and needle cover be 3-8um, under the unconventional high pressure of moulding plastics, the phenomenon of leaking glue can appear in this cooperation degree, if the clearance does for a short time again, will block the needle.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the glue leakage is easy to occur between the valve needle and the valve needle sleeve in the prior art, and providing a needle valve type hot runner injection mold.

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

designing a needle valve type hot runner injection mold, which comprises an upper mold, wherein the top of the upper mold is provided with a cylinder assembly, the cylinder assembly is fixedly arranged on the upper mold, four corners of the bottom of the upper mold are fixedly provided with guide posts, the bottom end of each guide post is provided with a lower mold, the guide posts are inserted in the lower mold and are in sliding connection with the lower mold, the top of the lower mold is fixedly provided with a valve needle seat, four corners of the valve needle seat are respectively provided with an extension rod, the four extension rods are respectively and fixedly arranged on the lower mold, the bottom of the upper mold is provided with a valve needle assembly, the valve needle assembly comprises a valve needle, the top end of the valve needle is provided with a cylinder piston, the cylinder piston is fixedly connected with the valve needle, the cylinder piston is clamped in the upper mold and is in sliding connection with the upper mold, the outer side of the, the inner side of the valve needle sleeve is clamped with a glue storage groove.

Preferably, the needle seat is provided with a needle hole matched with the needle, and the needle is inserted into the corresponding needle hole.

Preferably, a pouring gate department is arranged at the bottom end of the needle hole and is positioned in the valve needle seat.

Preferably, the top end inside the valve needle seat is provided with an air cavity.

Preferably, a guide assembly is arranged on the outer side of the lower die and fixedly mounted on the lower die.

The utility model provides a needle valve formula hot runner injection mold, beneficial effect lies in: in addition, after the plastic cement in the glue storage tank is carbonized, the shape of the plastic cement has accurate matching degree with the periphery of the valve needle, and the sealing effect is good; the carbon particles in the plastic carbide are good lubricating materials, so that the valve needle moves smoothly without influencing the movement of the valve needle.

Drawings

Fig. 1 is a schematic structural view of a needle valve type hot runner injection mold according to the present invention;

fig. 2 is a schematic structural view of an upper mold of the needle valve type hot runner injection mold according to the present invention;

fig. 3 is a schematic structural diagram of a valve needle assembly of the needle valve type hot runner injection mold according to the present invention.

In the figure: the device comprises an upper die 1, a cylinder assembly 2, a guide column 3, a lower die 4, a mandril 5, an insertion hole 6, a valve needle assembly 7, a valve needle 71, a valve needle sleeve 72, a glue storage groove 73, a valve needle seat 8, a needle hole 9, a guide assembly 10, a cylinder piston 11, an air cavity 12 and a sprue bush 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, a needle valve type hot runner injection mold comprises an upper mold 1, wherein a cylinder assembly 2 is arranged at the top of the upper mold 1, the cylinder assembly 2 is fixedly installed on the upper mold 1, guide posts 3 are fixedly installed at four corners of the bottom of the upper mold 1, a lower mold 4 is arranged at the bottom end of each guide post 3, the guide posts 3 are inserted in the lower mold 4 and are in sliding connection with the lower mold 4, a guide assembly 10 is arranged at the outer side of the lower mold 4, the guide assembly 10 is fixedly installed on the lower mold 4, a valve needle seat 8 is fixedly installed at the top of the lower mold 4, ejector rods 5 are arranged at the extensions of the four corners of the valve needle seat 8, and the four ejector; the cylinder assembly 2 is used for controlling the cylinder piston 11 so that the valve needle 71 can be stably inserted into the valve needle seat 8;

the valve needle assembly 7 is installed at the bottom of the upper die 1, the valve needle assembly 7 comprises a valve needle 71, a cylinder piston 11 is arranged at the top end of the valve needle 71, the cylinder piston 11 is fixedly connected with the valve needle 71, the cylinder piston 11 is clamped in the upper die 1 and is in sliding connection with the upper die 1, a valve needle sleeve 72 is arranged on the outer side of the top end of the valve needle 71, the valve needle sleeve 72 is fixedly clamped on the outer side of the valve needle 71, a rubber storage groove 73 is clamped on the inner side of the valve needle sleeve 72, and plastic carbide is filled in the rubber; a needle hole 9 matched with the valve needle 71 is formed in the valve needle seat 8, the valve needle 71 is inserted in the corresponding needle hole 9, an air cavity 12 is formed in the top end of the interior of the valve needle seat 8, a pouring gate driver 13 is arranged at the bottom end of the needle hole 9, and the pouring gate driver 13 is located in the valve needle seat 8; when the valve needle 71 and the valve needle sleeve 72 are not matched accurately and glue leaks, a small amount of plastic can stay in the glue storage tank 73, the plastic can play a role of a sealing ring after being heated and carbonized for a long time, and in addition, after the plastic in the glue storage tank 73 is carbonized, the shape of the plastic has accurate matching degree with the periphery of the valve needle 71, and the sealing effect is good; the carbon particles in the plastic carbide are good lubricating materials, so that the valve needle 71 moves smoothly without influencing the movement.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A needle valve type hot runner injection mold comprises an upper mold (1), wherein a cylinder assembly (2) is arranged at the top of the upper mold (1), the cylinder assembly (2) is fixedly installed on the upper mold (1), and is characterized in that four corners of the bottom of the upper mold (1) are fixedly provided with guide columns (3), the bottom ends of the guide columns (3) are provided with lower molds (4), the guide columns (3) are inserted in the lower molds (4) and are in sliding connection with the lower molds (4), valve needle seats (8) are fixedly installed at the top of the lower molds (4), push rods (5) are arranged on the extensions of the four corners of the valve needle seats (8), the four push rods (5) are fixedly installed on the lower molds (4), valve needle assemblies (7) are installed at the bottom of the upper mold (1), each valve needle assembly (7) comprises a valve needle (71), and a cylinder piston (11) is arranged at the top ends of the valve needles (71), cylinder piston (11) and needle (71) fixed connection, cylinder piston (11) joint is in last mould (1), and with last mould (1) sliding connection, the top outside of needle (71) is equipped with needle cover (72), the outside of needle cover (72) fixed joint in needle (71), the inboard card of needle cover (72) is equipped with stores up gluey groove (73).

2. The needle valve type hot runner injection mold according to claim 1, wherein the needle seat (8) is provided with a needle hole (9) matched with the needle (71), and the needle (71) is inserted into the corresponding needle hole (9).

3. A needle valve type hot runner injection mold according to claim 2, wherein the bottom end of the needle hole (9) is provided with a gate driver (13), and the gate driver (13) is positioned in the valve needle seat (8).

4. A needle valve type hot runner injection mold as claimed in claim 3, wherein the top end inside the valve needle seat (8) is provided with an air cavity (12).

5. The needle valve type hot runner injection mold according to claim 1, wherein a guide assembly (10) is provided on an outer side of the lower mold (4), and the guide assembly (10) is fixedly mounted on the lower mold (4).