KR101781370B1

KR101781370B1 - Injection molding machine nozzle assembly

Info

Publication number: KR101781370B1
Application number: KR1020150167736A
Authority: KR
Inventors: 김종한; 김영찬
Original assignee: 주식회사 와이드; 김영찬
Priority date: 2015-11-27
Filing date: 2015-11-27
Publication date: 2017-09-25
Also published as: KR20170062211A

Abstract

The present invention relates to a nozzle assembly for an injection molding machine.
The nozzle assembly for an injection molding machine of the present invention comprises a manifold in which a resin flow path for providing a path through which a molten resin flows from a resin injector is formed and a piston operating space is formed, A nozzle for forming a resin passage and forming a spray hole to be injected into a mold, a nozzle coupled to the manifold and provided with a heater on the outer periphery thereof, a nozzle pin having a moving direction perpendicular to the spray hole and interrupting the spray hole, And a detachable cap which is coupled to surround the nozzle to transmit heat from the manifold to the upper end of the nozzle and is provided with a hot wire on the outer surface and a thermally conductive material.
According to the above-described nozzle assembly for an injection molding machine, if the detachable cap is detachable, a detachable cap can be removed when a problem occurs in a hot wire, so that a repair work is facilitated, a detachable cap transfers heat from the manifold to an upper end of the nozzle, It is possible to smoothly flow the molten resin in the assembly.

Description

{INJECTION MOLDING MACHINE NOZZLE ASSEMBLY}

The present invention relates to a nozzle assembly for an injection molding machine.

Molding such as synthetic resin or thermoplastic resin in the form of powder or pellet is melted and filled in a product type cavity formed in the mold and then solidified by cooling to produce various types of products.

The present invention relates to an injection molding machine. An injection molding machine is an apparatus for injection molding. A molten resin from a resin injector is injected into a mold in a molten state through a resin flow path provided at one side. The upper mold includes a manifold for uniformly injecting resin into a plurality of cavities formed in the lower mold, and a plurality of injection nozzles for injecting resin into cavities of the lower mold are formed on the lower surface of the manifold, When the molten resin is filled at a high pressure and the resin filled in the cavity is solidified, the upper mold and the lower mold are separated from each other, and the molded product is taken out.

The injection molding machine used for such injection molding is provided with injection molding machines for injecting heat to the flow regions of the synthetic resin reaching the plurality of cavities provided in the injection mold in the injection cylinder to continuously maintain the molten state of the synthetic resin passing through the resin flow channels, The hot runner system for injection molding has an open gate type hot runner system in which the gate is always open and a valve gate type hot runner system in which the gate can be opened and closed. The application of the valve gate type hot runner system is widely spreading over the open gate type hot runner system.

Such an injection molding machine is disclosed in Korean Patent Laid-Open Publication No. 10-2005-0116173 entitled " injection nozzle valve gate " (hereinafter referred to as " prior art ").

Conventional nozzle assemblies for injection molding machines have a problem in that the heat of the heater is dispersed and effective and constant heat conduction can not be achieved in the resin flow path in the nozzle assembly for the injection molding machine.

In other words, when the resin supplied from the resin injector is injected into the mold through the resin flow path in the nozzle assembly in a molten state, the temperature of the molten resin can not be maintained constant and the molten resin in the nozzle assembly for injection molding machine The injection of the molten resin into the mold can not be normally performed, which may cause molding failure of the injection molding.

In addition, in the conventional nozzle assembly for injection molding machine, when a heat generating member such as a hot wire for melting resin is integrally fixed or inserted into one side of the assembly to cause a problem in hot wire and replacement or repair is required, There is a problem that the ease of operation of the apparatus is reduced and the working time is long.

The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a resin injector in which a resin supplied from a resin injector is maintained in a molten state and passes through a resin passage in a nozzle assembly, And a nozzle assembly for an injection molding machine.

In order to achieve the above object, the nozzle assembly for an injection molding machine according to the present invention comprises: a manifold having a resin flow path for providing a path through which molten resin flows from a resin injector to a mold, and a piston operating space; A nozzle coupled to the manifold and having a resin passage for spraying the molten resin flowing through the resin passage through the injection hole and having a heater on an outer periphery thereof; A nozzle pin provided for interrupting a spray hole of the nozzle and having a moving direction perpendicular to the spray hole; A detachable cap coupled to the manifold so as to surround the manifold, wherein the detachable cap is formed of a thermally conductive material; And a heat ray installed in the installation groove to generate heat; And a control unit.

And the detachable cap is detachable in the same direction as the moving direction of the nozzle pin.

And the detachable cap is coupled to surround the nozzle from the manifold to the upper end of the nozzle.

According to the present invention, since the detachable cap coupled to wrap the manifold to the upper end of the nozzle can be detached in the same direction as the moving direction of the nozzle pin, the detachable cap can be removed when a problem occurs in the hot line, There is an effect that the work is facilitated.

In addition, the detachable cap is coupled so as to surround the nozzle from the manifold to the upper end of the nozzle, thereby transferring heat between the manifold and the upper end of the nozzle, thereby smoothly flowing the molten resin into the nozzle assembly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration according to a conventional embodiment of a nozzle assembly for a conventional injection molding machine, which includes a manifold and an upper end of a nozzle. FIG.
FIG. 2 is a configuration diagram showing the configuration of a nozzle assembly for an injection molding machine according to the present invention.
FIG. 3 is a view showing a configuration according to a combination of a manifold of a nozzle assembly for an injection molding machine and an upper end of a nozzle according to the present invention.
4 is an exploded perspective view illustrating a process of detaching a detachable cap of a nozzle assembly for an injection molding machine according to the present invention.

The preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, in which the technical parts already known will be omitted or compressed for the sake of brevity.

2 and 3, the nozzle assembly 100 for an injection molding machine includes a manifold 110 in which a resin flow path 111 and a piston operation space 112 are formed; A nozzle 120 formed with a resin transfer path 121 and a spray hole 122 and equipped with a heater 123; A nozzle pin (130) for interrupting the spray hole (122); A detachable cap 140 having an installation groove 141 formed therein; Heat line 150; .

Each configuration will be described in more detail as follows.

The manifold 110 is provided with a resin flow path 111 through which a molten resin from a resin injector (not shown) is transferred to the resin transfer path 121 formed in the nozzle 120, And a piston operating space 112 into which the nozzle pin 130 can be inserted. Here, the piston operating space 112 is formed to be connected to a nozzle pin insertion hole 124 to be described later.

In addition, the piston operating space 112 may be formed in various shapes according to the coupling relationship or the coupling shape of the piston 10 and the nozzle fin 130.

The nozzle 120 is disposed on the lower side of the manifold 110 and a resin transfer path 121 is formed so that molten resin coming from the resin flow path 111 can be injected through the injection hole 122, A nozzle pin insertion hole 124 for inserting a nozzle pin 130 provided for interrupting the nozzle 122 is formed and the nozzle 120 is inserted into the nozzle 120 such that the temperature of the molten resin moving through the resin transfer path 121 is maintained. A heater 123 is provided on the outer periphery of the heater 123. Here, the heater 123 may be in the form of a line provided on the outer circumference of the nozzle 120 to perform heat transfer or a heat transfer through a cap surrounding the outer circumference of the nozzle 120, or a heater 123 may be provided in the outer circumference of the nozzle 120 And may be provided in various forms depending on the combination of the heater 123 and the nozzle 120 such as a heat transfer type.

The nozzle pin 130 passes from the piston operating space 112 through the nozzle pin inserting hole 124 through the resin transfer path 121 to the injection hole 122 and is coupled with the piston 10, Moves along with the movement and opens and closes the spray hole (122) according to the position of the piston (10).

In addition, in order to prevent the molten resin from flowing into the nozzle fin insert hole 124 and penetrating into the piston operating space 112 in accordance with the movement of the nozzle fin 130, (Not shown) may be provided.

The detachable cap 140 is formed with an installation groove 141 in which the heat ray 150 is installed.

The heat ray 150 is generated through electricity.

Here, the heat line 150 is provided as a resistance line that prevents the electricity from flowing well. The resistive line generates heat when the current flows, which is explained by the law of the line. The law of the line is a rule indicating the relationship between the magnitude of the current flowing through the resistor and the heat generated per unit time in the resistor, and accordingly, the heat wire 150 generated by electricity is used in the present embodiment.

The installation groove 141 is provided with a heat line 150.

The detachable cap 140 is made of a thermally conductive material and is coupled to enclose the manifold 110 from the manifold 110 to the upper end of the nozzle 120. Heat is transferred from the manifold 110 to the nozzle 120, Dispersed and delivered to the upper end of the container.

The detachable cap 140 is detachable in the same direction as the moving direction of the nozzle pin 130.

4, the detachable cap 140 is mounted on the manifold 120 in the same direction as the nozzle pin 130 moving in the vertical direction (of the nozzle) for opening and closing the spray hole 122 110 and the upper surface of the upper end of the nozzle 120 so that a portion where the heat ray 150 is intensively disposed is inserted adjacent to the resin flow path 111 formed in the manifold 110 .

In other words, the detachable cap 140 is detachably mounted on the upper surface of the manifold 110 and the upper surface of the nozzle 120, and the resin flow path 111 (not shown) formed inside the upper end of the nozzle 120 from the manifold 110 ) And the resin transfer path 121 are arranged such that a portion where the heat ray 150 is concentrated is made to contact the outer circumferential surface side provided with the resin flow path 111 and the resin transfer path 121, Thereby improving the heat conduction performance.

Accordingly, the upper fixing plate (not shown), which is connected to the upper end of the nozzle assembly 100 for the injection molding machine and fixes the nozzle assembly 100 for the injection molding machine, can be removed to attach or detach the detachable cap 140, 140 can be easily performed.

The detachable cap 140 may be implemented in various forms depending on the shape of the piston operating space 112.

A snap ring (not shown) may be provided on the upper end of the nozzle 120 and the manifold 110 in order to prevent the movement of the detachable cap 140 as the piston 10 moves.

1 and 3, the combination of the manifold 210 of the nozzle assembly 200 and the upper end of the nozzle 220 according to the prior art and the nozzle assembly 100 for the injection molding machine according to the present invention The nozzle assembly 200 for the injection molding machine according to the related art does not have the heater 230 at the joint portion and the resin flow channel Heat is not uniformly transferred to the resin transfer path 221 and the resin transfer path 221, and the molten resin may not be deformed or flow smoothly.

3, the nozzle assembly 100 for injection molding according to the present invention is configured such that the detachable cap 140 is coupled to the coupling part to transfer heat to the resin flow path 111 and the resin flow path 121, So that the molten resin smoothly flows.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. And the scope of the present invention is to be understood as being within the scope of the following claims and their equivalents.

100: nozzle assembly for injection molding machine
110: manifold
111: resin flow path
112: piston operating space
120: nozzle
121: Resin traveling path
122:
123: Heater
130: Nozzle pin
140: Desorption cap
141: Installation home
150: Heat line
10: Piston

Claims

A manifold in which a resin flow path for providing a path through which the molten resin from the resin injector flows to the mold is formed and in which a piston operating space is formed;
A nozzle coupled to the manifold and having a resin passage for spraying the molten resin flowing through the resin passage through the injection hole and having a heater on an outer periphery thereof;
A nozzle pin provided for interrupting a spray hole of the nozzle and having a moving direction perpendicular to the spray hole;
A detachable cap coupled to the manifold so as to surround the manifold, wherein the detachable cap is formed of a thermally conductive material; And
A heating wire installed in the installation groove to generate heat; / RTI >
And the detachable cap is coupled to surround the nozzle from the manifold to the upper end of the nozzle.
A nozzle assembly for an injection molding machine.

The method according to claim 1,
And the detachable cap is detachable in the same direction as the moving direction of the nozzle pin
A nozzle assembly for an injection molding machine.

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