CN219153601U

CN219153601U - Spring type needle valve hot runner nozzle

Info

Publication number: CN219153601U
Application number: CN202320184105.1U
Authority: CN
Inventors: 刘少斌
Original assignee: Xi'an Yunshuo Network Technology Co ltd
Current assignee: Xi'an Yunshuo Network Technology Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-06-09
Anticipated expiration: 2033-02-10

Abstract

The utility model discloses a spring type needle valve hot runner nozzle in the technical field related to the hot runner nozzle, which comprises a hot runner nozzle main body and a heating sleeve, wherein a second installation end is arranged at the lower end of the hot runner nozzle main body, a nozzle head is arranged on the outer side of the second installation end in a threaded connection mode, the heating sleeve is arranged on the outer side of the nozzle head in a threaded connection mode, a needle valve moving cavity is arranged in the center of the second installation end, a limiting table is arranged in the needle valve moving cavity, and a needle valve adjusting spring is arranged on the upper portion of the needle valve moving cavity. The hot runner nozzle of the utility model realizes the sealing and opening of the needle valve by means of air pressure, can accurately control the injection molding process, can avoid the infinite compression of the needle valve adjusting spring, effectively protects the spring, prolongs the service life of the needle valve adjusting spring, is provided with the heating sleeve outside the nozzle head, can heat and preserve the temperature of the injection molding nozzle, and is of an external structure, thereby being convenient for disassembly, assembly and maintenance.

Description

Spring type needle valve hot runner nozzle

Technical Field

The utility model belongs to the technical field of hot runner nozzles, and particularly relates to a spring type needle valve hot runner nozzle.

Background

The needle valve type hot runner system is characterized in that a hot nozzle and a hot runner plate are arranged on an injection mold, a heating principle is utilized, plastics are always kept in a molten state after coming out of a barrel of an injection molding machine, water inlet of products can be directly injected into the injection molding machine, after injection molding is finished, the nozzle opening is closed under the action of a needle valve, one or more water gaps are avoided, accordingly, no waste materials are generated, the needle valve in the existing needle valve hot runner system is easy to break due to the fact that the needle valve needs to continuously and repeatedly move up and down, a large amount of time is needed for maintenance, and the molten state of the plastics needs to be maintained at a high temperature. Patent number: CN202120909928.7 is a spring type single-point needle valve hot runner nozzle, the needle valve passes through screw thread fixed connection, when the needle valve takes place askew or damage, can be timely change, through setting up heating device, vacuum heat preservation chamber and heat preservation welt, can effectually guarantee that needle valve hot runner nozzle is in the high temperature state, avoid the state that the plastic low temperature appears solidifying, but this needle valve downwardly moving seals the dead weight that the export mainly relies on needle valve and piston alignment jig, after the completion of moulding plastics, because the intracavity throw away the plastic that has the molten state, pressure is great, the needle valve relies on dead weight hardly downwardly moving, can not be fine carry out the seal of export, heating device sets up the upper portion position in last regulating chamber, heat and heat preservation effect to lower reposition of redundant personnel chamber are not good, and heating device is built-in structure, the degree of difficulty of maintenance and change is great.

The present utility model has been made in view of this.

Disclosure of Invention

The utility model aims to solve the technical problems and overcome the defects in the prior art, and provides a spring type needle valve hot runner nozzle, which adopts the following basic conception:

the utility model provides a spring needle valve hot runner nozzle, includes hot runner nozzle main part and heating jacket, the lower extreme of hot runner nozzle main part is provided with installation end second, install the nozzle head through threaded connection in installation end second outside, install through threaded connection the nozzle head outside the heating jacket, the central point of installation end second puts and is provided with needle valve movable chamber, needle valve movable intracavity is provided with the spacing platform, needle valve adjusting spring is installed on needle valve movable chamber's upper portion, needle valve adjusting spring's lower extreme is connected with the piston board, the below central point of piston board puts fixed mounting needle valve rod.

As a further scheme of the utility model: the upper portion of hot runner nozzle main part is provided with installation end one, processing has the external screw thread on the excircle of installation end one for with hot runner nozzle main part is installed on the injection molding machine, the upper end of installation end one is provided with the pipe joint of moulding plastics, is used for being connected with the pipe of moulding plastics.

As still further aspects of the utility model: the temperature control box is arranged on the outer side of the heating sleeve, the display screen is embedded on the panel of the temperature control box, the operation key is arranged below the display screen, the power switch is arranged on one side below the operation key, and the button battery is arranged in the temperature control box and used for supplying power to the electric elements in the temperature control box.

As still further aspects of the utility model: the button cell is characterized in that a signal transceiver is arranged above the button cell, a control circuit board is arranged above the signal transceiver, a heating cavity with an annular structure is arranged in the heating sleeve, a heating wire with a spiral structure is arranged in the heating cavity, and a temperature sensor is arranged on the inner wall of the heating cavity and used for monitoring the working temperature of the heating sleeve.

As still further aspects of the utility model: the lower extreme of injection molding pipe joint holds the chamber with moulding plastics and is connected, the outside of moulding plastics holds the chamber and passes through eight runner and needle valve movable chamber intercommunication of moulding plastics, the inside of nozzle head is provided with the chamber of moulding plastics, the nozzle head is used for injecting the plastic of molten state into the mould.

As still further aspects of the utility model: the hot runner nozzle is characterized in that an air supply pipe is arranged on the outer side wall of the hot runner nozzle body, a pressure release valve is arranged on the air supply pipe, an air supply joint is arranged at the outer end of the air supply pipe, the inner end of the air supply pipe is communicated with the needle valve movable cavity on the upper portion of the piston plate, and the air supply pipe is used for supplying air to the needle valve movable cavity on the upper portion of the piston plate.

By adopting the technical scheme, compared with the prior art, the utility model has the following beneficial effects.

The hot runner nozzle realizes the sealing and opening of the needle valve by virtue of air pressure, can accurately control the injection molding process, can avoid the infinite compression of the needle valve adjusting spring, effectively protects the spring, and prolongs the service life of the needle valve adjusting spring by virtue of the design of the limiting table.

The heating sleeve is arranged on the outer side of the nozzle head, can heat and preserve heat at the injection nozzle position, is of an external structure, and is convenient to assemble, disassemble and maintain.

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model, without limitation to the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a front view of the present utility model;

FIG. 3 is a front cross-sectional view of the present utility model;

fig. 4 is a schematic view of a temperature control box according to the present utility model.

In the figure: 1-a hot runner nozzle body; 2-mounting a first end head; 3-injection molding the pipe joint; 4-a temperature control box; 5-heating the sleeve; 6-a nozzle head; 7-a gas supply pipe; 8-a pressure release valve; 9-an air supply joint; 10-needle valve rod; 11-a heating chamber; 12-heating wires; 13-a temperature sensor; 14-an injection molding cavity; 15-injection molding flow channels; 16-a piston plate; 17-mounting a second end head; 18-needle valve active cavity; 19-a limiting table; 20-needle valve adjusting spring; 21-an injection molding accommodation chamber; 22-a display screen; 23-operating a key; 24-a power switch; 25-button cell; 26-a control circuit board; 27-signal transceiver.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

As shown in fig. 1 to 4, a spring type needle valve hot runner nozzle comprises a hot runner nozzle body 1 and a heating sleeve 5, wherein a second installation end 17 is arranged at the lower end of the hot runner nozzle body 1, a nozzle head 6 is installed on the outer side of the second installation end 17 through threaded connection, the heating sleeve 5 is installed on the outer side of the nozzle head 6 through threaded connection, a needle valve moving cavity 18 is arranged at the central position of the second installation end 17, a limiting table 19 is arranged in the needle valve moving cavity 18, a needle valve adjusting spring 20 is installed at the upper part of the needle valve moving cavity 18, the lower end of the needle valve adjusting spring 20 is connected with a piston plate 16, a needle valve rod 10 is fixedly installed at the central position below the piston plate 16, the limiting table 19 can prevent the needle valve adjusting spring 20 from being infinitely compressed, the needle valve adjusting spring is effectively protected, and the service life of the needle valve adjusting spring 20 is prolonged.

The upper portion of the hot runner nozzle main body 1 is provided with a first installation end 2, an external thread is machined on the outer circle of the first installation end 2 and used for installing the hot runner nozzle main body 1 on an injection molding machine, and an injection molding pipe joint 3 is arranged at the upper end of the first installation end 2 and used for being connected with an injection molding pipe.

The outside of the heating jacket 5 is provided with a temperature control box 4, a display screen 22 is embedded on a panel of the temperature control box 4, an operation key 23 is arranged below the display screen 22, one side below the operation key 23 is provided with a power switch 24, and a button cell 25 is arranged in the temperature control box 4 and used for supplying power to electrical elements in the temperature control box 4.

A signal transceiver 27 is arranged above the button cell 25, a control circuit board 26 is arranged above the signal transceiver 27, a heating cavity 11 with an annular structure is arranged in the heating sleeve 5, a heating wire 12 with a spiral structure is arranged in the heating cavity 11, and a temperature sensor 13 is arranged on the inner wall of the heating cavity 11 and used for monitoring the working temperature of the heating sleeve 5.

The lower extreme of injection molding coupling 3 is connected with injection molding accommodation chamber 21, and the outside of injection molding accommodation chamber 21 is through eight runner 15 and needle valve movable chamber 18 intercommunication of moulding plastics, and the inside of nozzle tip 6 is provided with injection molding chamber 14, and nozzle tip 6 is used for injecting the plastic of molten state into the mould.

An air supply pipe 7 is arranged on the outer side wall of the hot runner nozzle body 1, a pressure release valve 8 is arranged on the air supply pipe 7, an air supply joint 9 is arranged at the outer end of the air supply pipe 7, the inner end of the air supply pipe 7 is communicated with a needle valve movable cavity 18 at the upper part of a piston plate 16, and the air supply pipe 7 is used for supplying air into the needle valve movable cavity 18 at the upper part of the piston plate 16.

The working principle of the utility model is as follows: the hot runner nozzle main body 1 is installed on the injection molding machine through the first installation end 2, the liquid supply pipeline of the injection molding machine is connected with the injection pipe joint 3, molten plastic is injected into the injection accommodating cavity 21, molten plastic enters the needle valve movable cavity 18 through the injection runner 15, when injection molding is started, the air pressure in the needle valve movable cavity 18 at the upper part of the piston plate 16 is reduced through the pressure release valve 8, the needle valve regulating spring 20 is reset, the needle valve rod 10 is driven to move upwards, the nozzle head 6 is opened, molten plastic is injected into the injection molding die, after injection molding is completed, the air supply pipe 7 is used for injecting the molten plastic into the needle valve movable cavity 18 at the upper part of the plug plate, the air pressure pushes the piston plate 16 to move downwards, the needle valve regulating spring 20 is stretched, the lower end of the needle valve rod 10 seals the outlet at the lower end of the nozzle head 6, the hot runner nozzle main body 1 is sealed and opened by means of air pressure, the injection molding process can be accurately controlled, the needle valve regulating spring 20 can be prevented from being infinitely compressed, the needle valve regulating spring is effectively protected, the service life of the regulating spring 20 is prolonged, the outer side of the nozzle head 6 is provided with the heating sleeve 5, the nozzle head 5 can be heated, the nozzle position can be conveniently disassembled and maintained by heating, and maintained by the heating sleeve is convenient for injection molding. The foregoing description is only illustrative of the preferred embodiment of the present utility model, and is not to be construed as limiting the utility model, but is to be construed as limiting the utility model to any and all simple modifications, equivalent variations and adaptations of the embodiments described above, which are within the scope of the utility model, may be made by those skilled in the art without departing from the scope of the utility model.

Claims

1. The utility model provides a spring needle valve hot runner nozzle, includes hot runner nozzle main part (1) and heating jacket (5), its characterized in that, the lower extreme of hot runner nozzle main part (1) is provided with installation end two (17), install end two (17) outside and install nozzle head (6) through threaded connection, install through threaded connection nozzle head (6) outside heating jacket (5), the central point of installation end two (17) puts and is provided with needle valve movable chamber (18), be provided with spacing platform (19) in needle valve movable chamber (18), needle valve adjusting spring (20) are installed on the upper portion of needle valve movable chamber (18), the lower extreme of needle valve adjusting spring (20) is connected with piston plate (16), the below central point of piston plate (16) puts fixed mounting needle valve rod (10).

2. The spring type needle valve hot runner nozzle according to claim 1, wherein a first installation end (2) is arranged at the upper part of the hot runner nozzle body (1), external threads are machined on the outer circle of the first installation end (2), and an injection pipe joint (3) is arranged at the upper end of the first installation end (2).

3. The spring type needle valve hot runner nozzle according to claim 1, wherein a temperature control box (4) is installed on the outer side of the heating sleeve (5), a display screen (22) is embedded on a panel of the temperature control box (4), an operation key (23) is arranged below the display screen (22), a power switch (24) is arranged on one side below the operation key (23), and a button cell (25) is installed in the temperature control box (4).

4. A spring type needle valve hot runner nozzle according to claim 3, characterized in that a signal transceiver (27) is installed above the button cell (25), a control circuit board (26) is installed above the signal transceiver (27), a heating cavity (11) with an annular structure is arranged in the heating sleeve (5), a heating wire (12) with a spiral structure is installed in the heating cavity (11), and a temperature sensor (13) is installed on the inner wall of the heating cavity (11).

5. A spring type needle valve hot runner nozzle according to claim 2, characterized in that the lower end of the injection pipe joint (3) is connected with an injection accommodating cavity (21), the outer side of the injection accommodating cavity (21) is communicated with a needle valve movable cavity (18) through eight injection runners (15), and an injection cavity (14) is arranged in the nozzle head (6).

6. The spring type needle valve hot runner nozzle according to claim 1, wherein an air supply pipe (7) is installed on the outer side wall of the hot runner nozzle main body (1), a pressure release valve (8) is installed on the air supply pipe (7), an air supply joint (9) is arranged at the outer end of the air supply pipe (7), and the inner end of the air supply pipe (7) is communicated with the needle valve moving cavity (18) at the upper part of the piston plate (16).