CN213082199U

CN213082199U - Cold runner nozzle structure

Info

Publication number: CN213082199U
Application number: CN202021664796.8U
Authority: CN
Inventors: 马辉; 王晖; 李瑞川; 徐辉
Original assignee: Ningbo Rending Machinery Co ltd
Current assignee: Ningbo Rending Machinery Co ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-04-30
Anticipated expiration: 2030-08-11

Abstract

The utility model relates to a cold runner nozzle structure, which relates to the field of sprue channels and comprises a nozzle seat, a material pipe which is arranged on the nozzle seat in a penetrating way and connected with the nozzle seat in a sliding way, a butting ring fixed on the outer side wall of the material pipe, an elastic part sleeved on the material pipe and a limiting seat fixed at the lower end of the nozzle seat, wherein the nozzle seat is provided with a sliding hole for the material supply pipe to slide in a penetrating way; wherein, when the lower terminal surface of material pipe was leveled with spacing seat lower terminal surface, the material hole stretched out the hole that slides. This application has the effect of the waste of the raw materials of moulding plastics when reducing the mould and opening.

Description

Cold runner nozzle structure

Technical Field

The application relates to the field of sprue channels, in particular to a cold runner nozzle structure.

Background

The cold runner refers to a portion between a mold inlet and a product gate; the raw material is kept in a flowing state in the runner by the injection pressure and the heat of the raw material.

If the Chinese patent with the publication number of CN210233848U, the cold runner structure mainly comprises an upper die holder, a glue injection sleeve, a heating plate, a runner, a glue opening sleeve, a heat insulation plate, an upper die plate, a lower die plate and a lower die holder; the bottom of the upper die base is provided with a heating plate, the glue injection sleeve penetrates through the upper die base and the heating plate, the glue injection sleeve penetrates through the middle of the upper die base, a shunting channel is arranged in the heating plate and is communicated with the glue injection sleeve, the bottom of the heating plate is provided with a heat insulation plate, the heat insulation plate is fixedly connected with the upper die plate, and the glue port sleeve is arranged in the heating plate, the heat insulation plate and the upper die plate and is used for communicating the shunting channel with the die cavity; the top of the lower die base is provided with a lower template, and the upper template and the lower template are matched and assembled to form a die cavity.

In view of the above-mentioned related technologies, the inventor thinks that there is a defect that when injection molding is performed, injection molding raw materials are injected into a mold cavity through a feed delivery pipe and a cold runner, the injection molding raw materials remain in the feed delivery pipe after the mold cavity is filled with the injection molding raw materials, and when the mold is opened, the injection molding raw materials remaining in the feed delivery pipe flow out through an upper mold under injection molding pressure, which results in waste of the injection molding raw materials.

SUMMERY OF THE UTILITY MODEL

In order to reduce the waste of the injection molding raw materials when the mold is opened, the application provides a cold runner nozzle structure.

The application provides a cold runner nozzle structure adopts following technical scheme:

a cold runner nozzle structure comprises a nozzle seat, a material pipe, a butting ring, an elastic part and a limiting seat, wherein the material pipe penetrates through the nozzle seat and is connected with the nozzle seat in a sliding mode, the butting ring is fixed on the outer side wall of the material pipe, the elastic part is sleeved on the material pipe, the limiting seat is fixed at the lower end of the nozzle seat, a sliding hole is formed in the nozzle seat, the material pipe penetrates through the sliding hole, an embedding groove for embedding the elastic part and the butting ring is formed in the lower side of the nozzle seat, the butting ring is connected with the nozzle seat in a sliding mode, one end of the elastic part abuts against the bottom of the embedding groove, the other end of the elastic part abuts against one end face of the butting ring, one side, away from the elastic part, of the butting ring abuts against the limiting seat, the lower end of the material pipe penetrates through the limiting seat and extends out of the limiting seat, the upper end of the;

when the lower end face of the material pipe is flush with the lower end face of the limiting seat, the material hole extends out of the sliding hole.

By adopting the technical scheme, when the mold is closed, the upper mold drives the material pipe to move upwards, the elastic piece is compressed, the material hole part of the material pipe extends out of the sliding hole, and the injection molding raw material flows into the mold cavity through the material hole and the material pipe in sequence; during the die sinking, the elastic component orders about the material pipe and moves down, and the material hole of material pipe inlays locates in the sliding hole, seals the material hole of material pipe, makes remaining difficult through the cope match-plate pattern outflow of raw materials of moulding plastics in the cold runner, has reduced the waste of the raw materials of moulding plastics.

Preferably, the elastic member is a disc spring.

Preferably, a sealing cap is fixed at the upper end of the material pipe, the material hole is formed in the lower side of the sealing cap, and an embedding groove for embedding the sealing cap is formed in the upper end of the nozzle seat.

By adopting the technical scheme, the sealing cap covers and seals the sliding hole by abutting against the groove bottom of the caulking groove, so that the injection molding raw material is not easy to enter the material pipe and the sliding hole after the lower die and the upper die are opened, and the waste of the injection molding raw material after the lower die and the upper die are opened is reduced; simultaneously, the setting of sealed cap has increased the area of contact of material pipe with the sizing material, and then has increased the pressure of sizing material to the material pipe, and the cooperation dish spring uses, and sealed cap can slide downwards rapidly with the material pipe when making the die sinking, seals the material pipe.

Preferably, the lower side of the nozzle holder is provided with a cooling cavity, a cooling liquid inlet communicated with the cooling cavity and a cooling liquid outlet communicated with the cooling cavity.

By adopting the technical scheme, the injection molding raw material passing through the material pipe can be cooled, so that the temperature of the injection molding raw material passing through the material pipe is not easy to be too high, the injection molding raw material is not easy to generate chemical reaction under a single environment (high temperature) in the material pipe, and the injection molding quality of the injection molding part is improved.

Preferably, the cooling cavity surrounds the outer side of the material pipe.

Through adopting above-mentioned technical scheme, the cooling chamber encircles in the outside of material pipe to make the material pipe be heated evenly all around, improved the cooling effect of cooling chamber to the material pipe.

Preferably, the nozzle holder is further provided with a spare inlet communicated with the cooling liquid inlet and a spare outlet communicated with the cooling liquid outlet.

Through adopting above-mentioned technical scheme, the user can conveniently select to use reserve import and reserve export according to actual conditions, still coolant liquid import and coolant liquid export, has increased the convenience that cold runner nozzle structure used.

Preferably, be equipped with straight material way, first awl material way and second toper material way on the material pipe, straight material way, first awl material way and second toper material way set gradually from last to bottom, first awl material way is from last to being degressive setting down, second toper material way is from last to being the setting that increases progressively down.

Through adopting above-mentioned technical scheme, reduced the size of first awl material way with the second toper material way junction to when convenient die sinking snap the injection molding from the junction of first awl material way with the second toper material way.

Preferably, an outer convex ring is fixed on the upper end face of the nozzle seat, and the outer convex ring and the material pipe are arranged concentrically.

Through adopting above-mentioned technical scheme, the setting of evagination ring is fixed a position when making things convenient for conveying pipeline and nozzle assembly to in the die cavity of mould is carried to the raw materials of will moulding plastics through the nozzle, improved the assembly efficiency of conveying pipeline and nozzle.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the mold is opened, the elastic piece drives the material pipe to move downwards, the material hole of the material pipe is embedded in the sliding hole to seal the material hole of the material pipe, so that residual injection molding raw materials in the cold runner are not easy to flow out through the upper mold plate, and the waste of the injection molding raw materials is reduced;

2. the injection molding material passing through the material pipe can be cooled, so that the temperature of the injection molding material passing through the material pipe is not easy to be too high, the injection molding material is not easy to generate chemical reaction in a single environment (high temperature) in the material pipe, and the injection molding quality of an injection molding part is improved.

Drawings

Fig. 1 is a schematic structural diagram of a cold runner nozzle structure according to an embodiment of the present application.

Fig. 2 is a full sectional view of a cold runner nozzle structure according to an embodiment of the present application.

Description of reference numerals: 1. a nozzle holder; 11. a sliding hole; 12. embedding a groove; 13. caulking grooves; 14. a cooling chamber; 15. a coolant inlet; 16. a coolant outlet; 17. an inlet is reserved; 18. a standby outlet; 19. an outer convex ring; 2. a material pipe; 21. material holes; 22. a straight material channel; 23. a first material tapering channel; 24. a second taper material channel; 25. a butting ring; 3. an elastic member; 4. a limiting seat; 5. and (5) sealing the cap.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses cold runner nozzle structure. Referring to fig. 1 and 2, the cold runner nozzle structure includes a nozzle holder 1, a material pipe 2, an abutting ring 25, an elastic member 3, and a stopper holder 4.

The nozzle seat 1 is arranged in a stepped shaft shape, the diameter of the upper side of the nozzle seat 1 is larger than that of the lower side of the nozzle seat 1, a sliding hole 11 is formed in the nozzle seat 1, the sliding hole 11 and the nozzle seat 1 are arranged concentrically, the sliding hole 11 penetrates through the upper end face and the lower end face of the nozzle seat 1, the material pipe 2 penetrates through the sliding hole 11 and is connected with the nozzle seat 1 in a sliding mode, the upper end of the material pipe 2 is closed, the outer side wall of the material pipe 2 is abutted to the inner side wall of the sliding hole 11, at least one material hole 21 is formed in the outer side wall of the upper end of the material; the abutting ring 25 is integrally arranged on the outer side wall of the lower end of the material pipe 2, the lower end of the nozzle seat 1 is provided with an embedding groove 12, the embedding groove 12 is communicated with the sliding hole 11, and the embedding groove 12 is used for embedding and sliding the abutting ring 25; the elastic part 3 is sleeved on the material pipe 2, one end of the elastic part 3 is abutted with the bottom of the embedding groove 12, the other end of the elastic part 3 is abutted with the upper end face of the abutting ring 25, the elastic part 3 can be a compression spring or a disc spring, and the elastic part 3 is preferably a disc spring; the limiting seat 4 is in threaded connection with the lower end of the nozzle seat 1, the upper end face of the limiting seat 4 is in butt joint with the lower end face of the butt joint ring 25, the butt joint ring 25 is limited in the embedding groove 12, and the lower end of the material pipe 2 penetrates through the limiting seat 4 and extends out of the limiting seat 4.

The upper end of the material pipe 2 is in threaded connection with a sealing cap 5, the sealing cap 5 is sleeved at the upper end of the material pipe 2, the upper end of the nozzle seat 1 is provided with a caulking groove 13, the sealing cap 5 is embedded in the caulking groove 13, the outer diameter of the sealing cap 5 is smaller than the inner diameter of the caulking groove 13, and the sealing cap 5 is abutted against the bottom of the caulking groove 13 so as to further seal the sliding hole 11; the upper end of the nozzle holder 1 is also integrally provided with an outer convex ring 19, and the outer convex ring 19 is concentrically arranged with the caulking groove 13 and the material pipe 2 so as to facilitate the assembly of the material conveying pipe 2 and the nozzle holder 1.

The cooling pipe is internally provided with a straight material channel 22, a first conical material channel 23 and a second conical material channel 24, the straight material channel 22, the first conical material channel 23 and the second conical material channel 24 are sequentially arranged from top to bottom, the straight material channel 22, the first conical material channel 23 and the second conical material channel 24 are communicated with each other, the first conical material channel 23 is arranged progressively decreasing from top to bottom, and the second conical material channel 24 is arranged progressively increasing from top to bottom so as to break an injection molding part from the connection part of the first conical material channel 23 and the second conical material channel 24 when the mold is opened.

The downside of nozzle holder 1 still is equipped with cooling chamber 14, cooling chamber 14 ring is located all around of material pipe 2, cooling chamber 14 is concentric setting with material pipe 2, coolant liquid import 15 and coolant liquid export 16 have been seted up on the up end of nozzle holder 1, coolant liquid import 15, coolant liquid export 16 all communicate with cooling chamber 14 each other to make things convenient for coolant to get into cooling chamber 14 and flow through coolant liquid export 16 through coolant liquid import 15, cool off to material pipe 2.

Still be equipped with reserve import 17 and reserve export 18 on the lateral wall of nozzle holder 1 upside, reserve import 17 and coolant liquid import 15 intercommunication each other, reserve export 18 and coolant liquid export 16 intercommunication each other to the actual use condition according to the nozzle is chooseed for use conveniently.

The implementation principle of the cold runner nozzle structure in the embodiment of the application is as follows: when the upper die and the lower die are closed, the upper die extrudes the material pipe 2 to drive the material pipe 2 to slide upwards, the disc spring is compressed, the lower end face of the material pipe 2 is flush with the lower end face of the limiting seat 4, the sealing cap 5 is separated from the bottom of the caulking groove 13, the material hole 21 extends out of the sliding hole 11 and is mutually communicated with the caulking groove 13, and injection molding raw materials are sequentially conveyed into a die cavity of the die through the material conveying pipe 2, the caulking groove 13, the material hole 21 and the material pipe 2; after the completion of moulding plastics, go up mould and lower mould separation die sinking, go up the mould and apply the extrusion force of feeder pipe 2 and disappear, material pipe 2 is in the driving about of dish spring downstream, and the lower extreme of material pipe 2 stretches out the downside of spacing seat 4, and sealing cap 5 seals sliding hole 11 with the tank bottom butt of caulking groove 13, makes remaining raw materials of moulding plastics in the conveying pipeline 2 be difficult for through the nozzle with go up the mould outflow, has reduced the waste of the raw materials of moulding plastics.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A cold runner nozzle structure, characterized by: comprises a nozzle seat (1), a material pipe (2) which is arranged on the nozzle seat (1) in a penetrating way and connected with the nozzle seat (1) in a sliding way, a butt joint ring (25) fixed on the outer side wall of the material pipe (2), an elastic part (3) sleeved on the material pipe (2) and a limiting seat (4) fixed at the lower end of the nozzle seat (1), wherein a sliding hole (11) for the feeding pipe (2) to slide in a penetrating way is arranged on the nozzle seat (1), an embedding groove (12) for the elastic part (3) and the butt joint ring (25) to be embedded is arranged at the lower side of the nozzle seat (1), the butt joint ring (25) is connected with the nozzle seat (1) in a sliding way, one end of the elastic part (3) is abutted against the other end of the groove bottom of the embedding groove (12) and one end face of the butt joint ring (25), one side of the butt joint ring (25) far away from the elastic part (3) is abutted against the limiting seat (4), the lower end of the material pipe (2) penetrates through, the upper end of the material pipe (2) is closed, the outer side wall of the material pipe (2) is abutted against the inner side wall of the sliding hole (11), and at least one material hole (21) is formed in the outer side wall, far away from the limiting seat (4), of the material pipe (2);

when the lower end face of the material pipe (2) is flush with the lower end face of the limiting seat (4), the material hole (21) extends out of the sliding hole (11).

2. The cold runner nozzle structure of claim 1, wherein: the elastic part (3) is a disc spring.

3. The cold runner nozzle structure of claim 1, wherein: the upper end of the material pipe (2) is fixed with a sealing cap (5), the material hole (21) is arranged at the lower side of the sealing cap (5), and the upper end of the nozzle seat (1) is provided with a caulking groove (13) for the sealing cap (5) to be embedded.

4. The cold runner nozzle structure of claim 1, wherein: and a cooling cavity (14), a cooling liquid inlet (15) communicated with the cooling cavity (14) and a cooling liquid outlet (16) communicated with the cooling cavity (14) are arranged on the lower side of the nozzle seat (1).

5. The cold runner nozzle structure of claim 4, wherein: the cooling cavity (14) surrounds the outer side of the material pipe (2).

6. The cold runner nozzle structure of claim 4 or 5, wherein: the nozzle holder (1) is also provided with a spare inlet (17) communicated with the cooling liquid inlet (15) and a spare outlet (18) communicated with the cooling liquid outlet (16).

7. The cold runner nozzle structure of claim 1, wherein: be equipped with straight material way (22), first awl material way (23) and second toper material way (24) on material pipe (2), straight material way (22), first awl material way (23) and second toper material way (24) set gradually from last to down, first awl material way (23) are from last to being degressive the setting down, second toper material way (24) are from last to being increasing progressively the setting down.

8. The cold runner nozzle structure of claim 1, wherein: an outer convex ring (19) is fixed on the upper end face of the nozzle seat (1), and the outer convex ring (19) and the material pipe (2) are arranged concentrically.