CN219405248U - Multiple composite accurate positioning needle valve nozzle - Google Patents

Abstract

The utility model relates to a needle valve nozzle with multiple composite precise positioning, which comprises a valve seat, wherein a transmission seat is arranged at the bottom end of the valve seat, a material conveying head is arranged at the joint of the valve seat and the transmission seat, a jack is arranged at the bottom end of the material conveying head, a material conveying port is arranged on the inner hole wall of the jack in a penetrating way through the inner cavity of the material conveying head, an electromagnetic coil and an armature are arranged in the transmission seat, a reset spring is arranged between the top end of the armature and the inner cavity wall of the transmission seat, a valve needle tube is fixedly inserted in the armature in a penetrating way, a material inlet is arranged on the outer annular wall of the valve needle tube in a penetrating way through the inner cavity, and precise positioning and guiding are performed by utilizing a plurality of different positions, so that the valve needle tube accurately enters a mold gate with a matching gap of 0.005mm, abrasion and cracking of the valve needle tube in the millions of repeated movement process are avoided, the arrangement of oil paths in the valve needle tube in the valve body is reduced, more sufficient limiting and guiding structures such as a guide cylinder and a guide sleeve are ensured, and the valve needle tube can be subjected to limiting and guiding, so that the valve needle tube is not easy to deviate and crack in high-frequency telescoping activities.

Description

Multiple composite accurate positioning needle valve nozzle

Technical Field

The utility model relates to the technical field of needle valve nozzles, in particular to a multiple composite precisely-positioned needle valve nozzle.

Background

The hot runner mold has various forms according to different nozzle structural forms, the types are different, but the processing technology and implementation method of each manufacturer are greatly different, and the quality and price difference of the hot runner system are determined. There are generally open, needle valve, and several other special forms. The needle valve type hot nozzle is controlled by mechanical pneumatic or hydraulic pressure, and the needle valve tube can close the pouring gate at the end section of the pressure retention, that is, the glue feeding system is closed when the product is not completely coagulated, and the forming period can be shortened.

The valve needle tube of the traditional needle valve nozzle is easy to damage and short in service life, because the valve needle is easy to wear and burst due to deflection in the millions of repeated movement processes, in addition, the conveying path of the feeding pipeline of the traditional needle valve nozzle is long, and in the conveying and feeding processes, the limiting of the valve needle is insufficient due to the fact that the feeding pipeline is distributed near the valve needle tube, so that the problem of deflection of the valve needle tube is also easy to be caused.

Disclosure of Invention

The utility model solves the problem of easy damage of a needle valve tube by providing a multiple composite precisely positioned needle valve nozzle.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a needle valve nozzle of multiple compound accurate positioning, includes the disk seat, the bottom installation drive seat of disk seat, the delivery head is installed to the junction of disk seat and drive seat, the jack has been seted up to the bottom of delivery head, the delivery mouth is seted up to the hole wall of jack run through delivery head inner chamber, install solenoid and armature in the drive seat, install reset spring between the top of armature and the drive seat inner chamber wall, run through fixedly in the armature and insert a needle pipe, the pan feeding mouth has been seted up to the outer rampart of valve needle pipe run through the inner chamber, in the slip of the top looks adaptation of valve needle pipe inserts the jack, just the pan feeding mouth sets up with the delivery mouth position relatively.

Preferably, a guide cylinder is fixedly arranged at the bottom end of the transmission seat, a guide sleeve is arranged at one end of the guide cylinder far away from the transmission seat in a threaded manner, and the valve needle tube penetrates through the guide cylinder and the guide sleeve in a sliding manner.

Preferably, the guide cylinder and the guide sleeve are internally provided with positioning guide cavities, and the valve needle tube penetrates through the positioning guide cavities and extends to the lower part of the guide sleeve.

Preferably, a material injection cavity is formed in the valve seat, a material injection port is formed in the top of the upper cavity of the material injection cavity, penetrates through the top end of the valve seat, and a filter screen is arranged in the material injection port.

Preferably, the cavity bottom of the material injection cavity is fixedly provided with a material conveying head, and the material injection cavity is communicated with the inner cavity of the material conveying head.

The beneficial effects of the utility model are as follows:

firstly, a guide cylinder and a guide sleeve are added in a telescopic moving path of a valve needle tube to fully wrap the valve needle tube, and the valve needle tube accurately enters a mold gate with a fit clearance of 0.005mm by utilizing a plurality of different positions for precise positioning and guiding, so that abrasion and cracking of the valve needle tube in the millions of repeated moving processes are avoided;

then, set up the pan feeding mouth at the afterbody of valve needle tube, set up the defeated stub bar in the disk seat of valve needle tube afterbody, set up the defeated material mouth in defeated stub bar and the sliding grafting department of valve needle tube, flexible activity of valve needle tube is to the position department of pan feeding mouth and defeated material mouth, the material in the defeated stub bar can enter into in the valve needle tube inner chamber, the valve needle tube just is pushed out from the uide bushing this moment, the method even inserts in the mould runner, the advantage of this design lies in the arrangement that valve needle tube inner chamber carried oil pipe reduces the oil circuit in the valve body, ensure to have more abundant spacing guide structure such as guide cylinder and uide bushing, can carry out spacing direction to the valve needle tube, just make the valve needle tube be difficult to appear the skew and wear and tear in the flexible activity of high frequency yet.

Drawings

FIG. 1 is a schematic view of the overall appearance structure of the present utility model;

FIG. 2 is a schematic diagram of a front cross-sectional structure of the present utility model;

FIG. 3 is an enlarged schematic view of the structure of FIG. 2A according to the present utility model;

FIG. 4 is a schematic view of the mounting structure of the valve needle tube of the present utility model.

Legend description:

1. a valve seat; 11. a material injection cavity; 12. a filter screen; 13. a feed head; 131. a jack; 132. a material conveying port;

2. a transmission seat; 21. an electromagnetic coil; 22. a return spring; 23. an armature; 24. a valve needle tube; 241. a feed inlet;

3. a guide cylinder;

4. a guide sleeve.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Specific examples are given below.

Referring to fig. 1-4, a needle valve nozzle with multiple composite precise positioning comprises a valve seat 1, a transmission seat 2 is arranged at the bottom end of the valve seat 1, a material conveying head 13 is arranged at the joint of the valve seat 1 and the transmission seat 2, the material conveying head 13 is in a cylindrical design, the top is directly communicated with a material conveying cavity 11, materials in the material conveying cavity 11 only enter the material conveying head 13, a jack 131 is arranged at the bottom end of the material conveying head 13, a material conveying opening 132 is arranged at the inner hole wall of the jack 131 in a penetrating manner through the inner cavity of the material conveying head 13, an electromagnetic coil 21 and an armature 23 are arranged in the transmission seat 2, the electromagnetic coil 21 is powered to generate a magnetic field to obtain an adsorption force to tighten and absorb the armature 23, (at the moment, a reset spring 22 is forced to deform to obtain a reset thrust) is arranged between the top end of the armature 23 and the inner cavity wall of the transmission seat 2, a valve needle pipe 24 is fixedly inserted in the armature 23, a material inlet 241 is arranged in the inner cavity in a penetrating manner through the outer annular wall of the valve needle pipe 24, the jack 131 is correspondingly matched with the top end of the valve needle pipe 24, the tail of the valve 24 is always telescopic in the jack 131, and the material leakage is avoided, and the position of the material inlet 241 is opposite to the material inlet 132.

Referring to fig. 1 to 4, particularly, a guide cylinder 3 is fixedly installed at the bottom end of a transmission seat 2, a guide sleeve 4 is installed at one end of the guide cylinder 3 far away from the transmission seat 2 in a threaded manner, a valve needle tube 24 penetrates through the guide cylinder 3 and the guide sleeve 4 in a sliding manner, positioning guide cavities are formed in the guide cylinder 3 and the guide sleeve 4, the inner diameter of each positioning guide cavity is consistent with the outer diameter of the valve needle tube 24, the cavity length of each positioning guide cavity is consistent with the sum of the lengths of the guide cylinder 3 and the guide sleeve 4, a guide limiting effect is achieved on the valve needle tube 24, the valve needle tube 24 penetrates through the positioning guide cavities to extend to the lower portion of the guide sleeve 4, a material injection cavity 11 is formed in a valve seat 1, a material injection opening is formed in the upper cavity top of the material injection cavity 11 penetrates through the top end of the valve seat 1, a filter screen 12 is installed in the material injection opening, the filter screen 12 can prevent large particle impurities from entering the valve needle tube 24, a runner in the valve needle tube 24 is blocked, the cavity bottom of the material injection cavity 11 is fixedly provided with a material conveying head 13, and the material injection cavity 11 is communicated with the cavity of the material conveying head 13.

Working principle:

firstly, the electromagnetic coil 21 is powered by a lead wire, so that the electromagnetic coil 21 is electrified to generate a magnetic field to absorb the armature 23, the valve needle tube 24 is retracted at the moment, the position of a feed inlet 241 at the tail part of the valve needle tube 24 is not opposite to the position of a feed inlet 132 at the bottom of the feed delivery head 13, and at the moment, materials cannot be pressed into the valve needle tube 24;

secondly, installing the valve seat 1 at the output end of an injection molding machine, moving the whole needle valve nozzle to an injection molding station through the injection molding machine, enabling the valve needle tube 24 to be opposite to a mold gate, and injecting a sufficient amount of material into the material injection cavity 11 of the valve seat 1 through the injection molding machine;

and thirdly, the power supply circuit of the electromagnetic coil 21 is disconnected again, so that the electromagnetic coil 21 does not absorb the pulling force to the armature 23, at the moment, the armature 23 is pushed by the reset spring 22, and the valve needle tube 24 is driven to move along the direction away from the electromagnetic coil 21, at the moment, the end part of the valve needle tube 24 is exposed from the guide sleeve 4, the next pouring gate material injection is convenient, and when the valve needle tube 24 moves to the position of the material inlet 241 opposite to the position of the material inlet 132 at the bottom of the material delivery head 13, the material in the material delivery head 13 enters the valve needle tube 24, and the material injection to the die is completed through the valve needle tube 24.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (5)

1. The utility model provides a needle valve nozzle of multiple compound accurate positioning, includes disk seat (1), its characterized in that, bottom installation drive seat (2) of disk seat (1), delivery head (13) are installed to the junction of disk seat (1) and drive seat (2), jack (131) have been seted up to the bottom of delivery head (13), delivery mouth (132) are seted up to the hole wall of jack (131) through delivery head (13) inner chamber, install solenoid (21) and armature (23) in drive seat (2), install reset spring (22) between the top of armature (23) and drive seat (2) inner chamber wall, run through in armature (23) fixedly and inserted a needle pipe (24), the outer annular wall of needle pipe (24) runs through the inner chamber and has seted up feed inlet (241), in the slip of the top looks adaptation of needle pipe (24) inserts jack (131), just feed inlet (241) and feed inlet (132) position are relative to be set up.

2. The needle valve nozzle with multiple composite precise positioning according to claim 1, wherein a guide cylinder (3) is fixedly arranged at the bottom end of the transmission seat (2), a guide sleeve (4) is arranged at one end of the guide cylinder (3) far away from the transmission seat (2) in a threaded manner, and the needle valve tube (24) penetrates through the guide cylinder (3) and the guide sleeve (4) in a sliding manner.

3. The multiple composite precisely-positioned needle valve nozzle according to claim 2, wherein positioning guide cavities are formed in the guide cylinder (3) and the guide sleeve (4), and the needle tube (24) penetrates through the positioning guide cavities and extends to the lower side of the guide sleeve (4).

4. The multiple composite precisely-positioned needle valve nozzle according to claim 1, wherein a material injection cavity (11) is formed in the valve seat (1), a material injection opening is formed in the upper cavity top of the material injection cavity (11) penetrating through the top end of the valve seat (1), and a filter screen (12) is arranged in the material injection opening.

5. The multiple composite precisely-positioned needle valve nozzle according to claim 4, wherein the bottom of the material injection cavity (11) is fixedly provided with a material conveying head (13), and the material injection cavity (11) is communicated with the inner cavity of the material conveying head (13).