KR101628243B1 - Hot runner apparatus for injection molding - Google Patents

Hot runner apparatus for injection molding Download PDF

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Publication number
KR101628243B1
KR101628243B1 KR1020150065119A KR20150065119A KR101628243B1 KR 101628243 B1 KR101628243 B1 KR 101628243B1 KR 1020150065119 A KR1020150065119 A KR 1020150065119A KR 20150065119 A KR20150065119 A KR 20150065119A KR 101628243 B1 KR101628243 B1 KR 101628243B1
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KR
South Korea
Prior art keywords
nozzle
pieces
resin
nozzle body
coupling
Prior art date
Application number
KR1020150065119A
Other languages
Korean (ko)
Inventor
이기희
강신호
이일행
김승호
이종태
Original Assignee
피피아이평화 주식회사
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Application filed by 피피아이평화 주식회사 filed Critical 피피아이평화 주식회사
Priority to KR1020150065119A priority Critical patent/KR101628243B1/en
Priority to PCT/KR2016/001178 priority patent/WO2016182169A1/en
Application granted granted Critical
Publication of KR101628243B1 publication Critical patent/KR101628243B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/20—Injection nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2725—Manifolds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2737—Heating or cooling means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2737—Heating or cooling means therefor
    • B29C2045/2754—Plurality of independent heating or cooling means, e.g. independently controlling the heating of several zones of the nozzle

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The present invention relates to a hot runner apparatus for injection molding. The hot runner apparatus comprises: a manifold having a resin conveying path formed therein; a nozzle having a resin inlet port therein, installed in the manifold to allow the resin inlet port to communicate with the resin conveying path, and introducing the resin supplied from the manifold to an injection mold; and a valve for opening and closing the nozzle. In the hot runner apparatus, the nozzle comprises: a nozzle main body including a plurality of separable nozzle pieces bound with each other in an assembled position and installed to communicate with the manifold at one side and with the injection mold at the other side; a first binder coupled to one side of the nozzle main body to confine one side of each of the nozzle pieces bound with each other in an assembled position; and a second binder coupled to the other side of the nozzle main body to confine the other side of each of the nozzle pieces bound to each other in an assembled position.

Description

[0001] HOT RUNNER APPARATUS FOR INJECTION MOLDING [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot runner apparatus for injection molding, and more particularly to a hot runner apparatus for injection molding provided in a mold for injection molding.

In general, an injection mold is a device which is injected into a mold having a cavity, which is a certain space for molding a molten resin which is heated and softened in an injection machine to lose its elasticity and has a plasticity, into a product (injection product), and then cooled and solidified.

Injection molding is a method of processing synthetic resin by processing, heating a thermoplastic resin (thermoplastic resin) in a heated cylinder, fluidizing it, injecting it into a mold with an injection ram, and injecting it with a plunger.

The injection molding machine for injection molding conventionally has a simple structure in which a mold and a nozzle are simply connected to each other. However, in such a conventional injection molding machine, when a molten resin at a high temperature is supplied, each component due to heat is expanded, There are various problems such that the connection part is opened and the resin is leaked through a path other than the nozzle, so that the durability of the parts is drastically lowered and the produced product is often defective.

In order to solve such a problem, in recent injection molding machines, a hot runner is provided in the injection molding machine as a structure for heating the manifold having a resin supply path to which resin is supplied .

The hot runner is an apparatus for injecting the molten resin into the mold at a high temperature while maintaining the temperature of the resin at a high temperature when injecting the molten resin into the injection mold. The hot runner is installed inside the mold sandwiched by a plurality of flat plate.

The hot runner is configured to include a manifold for dividing and feeding the molten resin to various positions, a nozzle connected to the manifold, and a cylinder for opening and closing the nozzle.

The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 10-2014-0855933 (published on Sep. 02, 2008, entitled Hot Runner System for Injection Mold).

The present invention has an excellent injection molding performance for a resin having a narrow temperature range in which a resin is melted and hardly burned, such as hard PVC, and has a structure that can be easily maintained and costly and time- And an object of the present invention is to provide an improved hot runner apparatus for injection molding.

A hot runner apparatus for injection molding according to the present invention comprises: a manifold in which a resin transfer path is formed in which a resin is moved; A nozzle which is provided in the manifold so that the resin injection hole communicates with the resin transfer passage and injects the resin introduced from the manifold into the injection mold; And an opening / closing part for opening / closing the nozzle, wherein the nozzle is formed by combining a plurality of nozzle pieces detachably coupled to each other at a coupling position, the one side communicating with the manifold and the other side communicating with the injection mold A nozzle body; And a first coupling member coupled to one side of the nozzle body and restricting one side of each of the nozzle pieces combined to the coupling position.

Further, in the nozzle piece, a resin injection groove is formed concavely; It is preferable that the resin injection hole is formed in the nozzle body by combining the plurality of resin injection holes when the plurality of nozzle pieces are combined at the engagement position.

It is preferable that the first coupling member is pressed against one side of the nozzle body so as to surround the outer circumferential surface of the nozzle body so that one side of each of the nozzle pieces combined to the coupling position is pressed in a direction in which the nozzle body is in close contact with each other.

A first engaging portion formed on an outer circumferential surface of the nozzle body, the engaging portion engaging with the first engaging member; Preferably, the fitting portion is tapered so that a circumferential length of the fitting portion gradually expands along a direction in which the first fitting portion is slidably engaged.

The nozzle may further include a second coupling member coupled to the other side of the nozzle body and restricting the other side of each of the nozzle pieces combined at the coupling position.

In addition, it is preferable that the second coupling member surrounds the nozzle body and fixes the other side of each of the nozzle pieces combined with the other side of the nozzle body to be combined at the engagement position.

A threaded portion is formed on the outer circumferential surface of the other side of the nozzle body; Preferably, the second coupling member includes a cover portion surrounding and enclosing each nozzle piece combined with the engagement position, and a cover engagement portion formed on an inner circumferential surface of the cover portion and engaged with the screw engagement portion.

The present invention further includes a heating coil installed in the nozzle to heat the nozzle.

The nozzle further includes a fastening member fastened to the other side of the nozzle body and coupling the plurality of nozzle pieces combined at the engagement position, And each of the nozzle pieces is formed with a fastening hole through which the fastening member is fastened.

The nozzle body may include two nozzle pieces detachably coupled to each other at the coupling position. A groove portion is recessed in the nozzle piece of any one of the two nozzle pieces so as to have a length extending along the longitudinal direction of the nozzle piece; And the protruding portion engaged with the groove portion is formed to protrude from the nozzle piece of the other of the two nozzle pieces so as to have a length extending along the longitudinal direction of the nozzle piece.

It is preferable that the groove portion and the protrusion portion are formed so as to be disposed outside the resin injection hole.

It is also preferable that the two nozzle pieces are guided to a position where they are combined to the engagement position by engagement of the groove portion and the projection portion.

It is also preferable that the two nozzle pieces are guided to a position where the fastening holes formed in the respective nozzle pieces are connected to each other by the engagement of the groove portion and the projecting portion.

Further, the present invention may further comprise a temperature measuring unit for measuring the temperature of the nozzle; In any one of the nozzle pieces, the insertion groove into which the temperature measuring unit is inserted is preferably concave.

According to the hot runner apparatus for injection molding of the present invention, the nozzle can be separated into a plurality of nozzle pieces, so that even if the resin is burnt inside the nozzle and the resin injection hole is clogged, It is possible to easily remove the residue, and therefore, it has an excellent effect on injection workability for a resin which is liable to burn due to a narrow temperature range of melting by a resin such as hard PVC.

Further, according to the present invention, the nozzle can be separated into a plurality of nozzle pieces, thereby making it possible to easily perform the maintenance work and reduce the maintenance cost and time.

Further, according to the present invention, it is possible to effectively prevent leakage of the resin introduced into the resin injection hole through the joining portion between the nozzle pieces through the airtight structure formed by the engagement of the groove portion and the projection portion and the joining structure formed by joining the nozzle piece and the fastening member Thereby providing improved airtight performance.

1 is a schematic view illustrating a structure of a hot runner apparatus for injection molding according to an embodiment of the present invention.
2 is a perspective view illustrating a nozzle according to an embodiment of the present invention.
FIG. 3 is an exploded perspective view of a nozzle according to an embodiment of the present invention.
4 is a cross-sectional view of a nozzle according to an embodiment of the present invention.
5 is an exploded perspective view of the nozzle according to another embodiment of the present invention.
6 is an exploded perspective view illustrating the nozzle piece according to another embodiment of the present invention.
7 is a cross-sectional view illustrating a nozzle according to another embodiment of the present invention.

Hereinafter, an embodiment of a hot runner apparatus for injection molding according to the present invention will be described with reference to the accompanying drawings. For convenience of explanation, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a schematic view showing a structure of a hot runner apparatus for injection molding according to an embodiment of the present invention, and FIG. 2 is a perspective view illustrating a nozzle according to an embodiment of the present invention. FIG. 3 is an exploded perspective view illustrating a nozzle according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view illustrating a nozzle according to an embodiment of the present invention.

1 and 2, a hot runner apparatus 100 for injection molding according to an embodiment of the present invention includes an injection mold, i.e., a clamping plate 1, a space plate 2 A holding plate 3 and a cavity plate 4 and includes a manifold 110, a nozzle 120, and an opening /

The manifold 110 is installed inside the space plate 2, and the resin supplied through the injector is heated using a heater (not shown) and maintained at a high temperature. In the manifold 110, a plurality of resin transfer passages 111 are formed in a lattice shape.

The resin supplied to the manifold 110 through the injector moves through the inside of the manifold 110 through the resin transfer passage 111 and is supplied to the nozzle 120. The shape of the resin transfer passage 111 is a shape The size and position can be determined differently depending on the volume of the mold and injection conditions.

The nozzle 120 keeps the resin that has passed through the manifold 110 from solidifying and serves as a passage for discharging the resin supplied through the manifold 110 to the inside of the injection mold.

Inside the nozzle 120, a resin injection hole h is formed to form a passage through which the resin supplied through the manifold 110 is discharged into the injection mold.

The nozzle 120 in which the resin injection hole h is formed is installed in the manifold 110 so that the resin injection hole h communicates with the resin transfer passage 111, Is injected into the injection mold, or more specifically, the cavity plate 4. [

One side of the nozzle 120 communicates with the resin transfer passage 111 of the manifold 110 and the other side of the nozzle 120 is provided to communicate with the cavity plate 4.

The opening and closing part 130 is provided to open and close the nozzle 120. In this embodiment, the opening and closing part 130 is exemplified as being provided in a form including the piston 131 and the cylinder 133.

When the resin is discharged through the nozzle 120, the other end of the nozzle 120 is fixed to the surface of the cavity plate 4, and the amount of the discharged resin is equal to the amount of the piston 131 installed in the cylinder 133, As shown in FIG.

At this time, the piston 131 is raised and lowered by pneumatic pressure supplied through an air line (not shown) formed in the cylinder 131, and the resin 131 discharged through the nozzle 120 according to the lifting distance of the piston 131 And the like.

3 and 4, the nozzle 120 includes a nozzle body 121, a first coupling body 123, and a second coupling body 125. [

The nozzle body 121 is formed by combining a plurality of nozzle pieces 122 which are detachably coupled to each other at a coupling position. In this embodiment, two nozzle pieces 122 are combined to form a nozzle body 121 as an example.

The nozzle piece 122 is formed to have a shape that forms a part of the nozzle body 121. In this embodiment, the nozzle piece 122 is formed by cutting the nozzle body 121 into two parts around an imaginary line extending in the longitudinal direction of the resin injection hole h, and each of the nozzle pieces 121 122 are formed symmetrically with respect to each other.

In each nozzle piece 122 formed as described above, a resin injection groove 122a is formed concavely. The resin injection grooves 122a formed in the respective nozzle pieces 122 are connected to each other to form the resin injection holes h when the nozzle pieces 122 are combined at the engagement positions.

That is, the resin injection holes h are formed by combining the resin injection grooves 122a formed in the respective nozzle pieces 122 so as to be connected to each other when the plurality of nozzle pieces 122 are combined into the engagement position, As shown in FIG.

One side of the nozzle body 121 which is a combination of the plurality of nozzle pieces 122 is communicated with the manifold 110 (see FIG. 1), and the other side of the nozzle body 121 is connected to the cavity plate 4 (See FIG. 4).

The resin injection hole h formed in the nozzle body 121 is connected to the inside of the nozzle body 121 so that one side thereof communicates with the manifold 110 and the other side communicates with the cavity plate 4 Respectively.

The first coupling member 123 is coupled to one side of the nozzle body 121 and restricts one side of each nozzle piece 122 combined to the coupling position.

In this embodiment, the first coupling member 123 is illustrated as being formed in a ring shape surrounding the outer peripheral surface of the nozzle body 121. The first coupling member 123 is inserted into one side of the nozzle body 121 so as to surround the outer circumferential surface of the nozzle body 121 so that one side of each of the nozzle pieces 122 combined to the coupling position Pressure.

The first coupling member 123 is coupled to the outer circumferential surface of one side of the nozzle body 121 to form a fitting portion 121a into which the first coupling member 123 is slidably inserted.

The fitting portion 121a is formed so that the circumferential length gradually increases along the direction in which the first coupling member 123 is slidably and constrained, that is, along the longitudinal direction of the nozzle body 121, And is tapered so that the circumferential length gradually increases toward the other side of the main body 121.

The first coupling member 123 coupled to the fitting member 121a formed on the outer circumferential surface of one side of the nozzle body 121 has the nozzle body 121 along the fitting member 121a at one side of the nozzle body 121, The one side of the nozzle body 121 can be stably clamped with a strong pressing force by pressing each of the nozzle pieces 122 in a direction in which they closely contact each other with a stronger force as they are slid toward the other side of the nozzle body 121. [

The second assembly 125 is provided to restrain the other side of each nozzle piece 122 which is coupled to the other side of the nozzle body 121 and combined to the engagement position. The second coupling member 125 covers the nozzle body 121 and is engaged with the other side of the nozzle body 121 to fix the other side of each nozzle piece 122 combined to the coupling position.

A threaded portion 121b having a threaded shape is formed on the outer circumferential surface of the other side of the nozzle body 121 and the second coupled body 125 is formed with a cover portion 125a and a cover engaging portion 125b, As shown in FIG.

The cover portion 125a is formed in the shape of a pipe having an inner diameter corresponding to the outer diameter of the nozzle body 121. [ The cover portion 125a thus formed encloses the nozzle body 121 and accommodates therein the respective nozzle pieces 122 combined into the engagement position.

On the inner circumferential surface of the cover part 125a formed as described above, the cover engaging part 125b is formed in a shape including a thread. The cover engaging portion 125b thus formed is engaged with the screw engaging portion 121b through a screw connection in the cover portion 125a.

The other side of each nozzle piece 122 is fixed by the second coupling member 125 through the screw connection of the screw coupling portion 121b and the cover coupling portion 125b.

The second coupling member 125 including the cover portion 125a and the cover coupling portion 125b includes a plurality of nozzle pieces 122 assembled into the coupling position, The other side of the nozzle body 121 formed by combining the plurality of nozzle pieces 122 at the engagement position can be stably restrained.

Meanwhile, the hot runner apparatus 100 for injection molding according to the present embodiment may further include a heating coil 140. The heating coil 140 is installed in contact with the nozzle body 121 on the outer side of the nozzle 120, more specifically, the nozzle body 121 to heat the nozzle 120, And serves to keep the temperature of the resin injected into the inside at a set temperature.

Reference numeral 145 denotes a coil cover provided outside the heating coil 140 so as to cover the heating coil 140 so that the heating coil 140 is not exposed to the outside.

Hereinafter, the operation and effects of the hot runner apparatus 100 for injection molding according to the present embodiment will be described.

According to the hot runner apparatus 100 for injection molding of the present embodiment, the resin injection hole h is formed in the nozzle 120 and the resin supplied to the manifold 110 through the injector is passed through the resin transfer passage 111 And the resin supplied to the nozzle 120 is supplied to the resin injection hole h (h) formed in the nozzle 120, as described above, by moving the inside of the manifold 110 through the nozzle 120 To the inside of the cavity plate 4 of the injection mold.

In this process, the nozzle 120 keeps the resin that has passed through the manifold 110 from solidifying, and serves as a path for discharging the resin supplied through the manifold 110 to the inside of the injection mold.

At this time, when the temperature of the resin passing through the nozzle 120 is lower than the melting condition of the temperature resin, the resin can be solidified inside the nozzle 120, and when the temperature is higher than the melting condition of the temperature resin of the resin passing through the nozzle 120, Can be burned inside the nozzle 120.

Particularly, in the case of the hard PVC, since the hard PVC is not burned and the temperature range in which the resin is melted is narrow, the temperature of the resin injected through the nozzle 120 is not easily controlled, and the resin passing through the nozzle 120 is solidified, The nozzle 120 may be clogged and the injection of the resin may not be performed properly.

Therefore, when the nozzle 120 is clogged, the resin 120 injected into the nozzle 120 must be purged to remove the resin that has solidified or adhered to the resin injection hole h.

According to the present embodiment, the nozzle 120 is assembled by fixing the one side and the other side of the nozzle body 121, in which the plurality of nozzle pieces 122 are combined, with the first and second assemblies 123 and 125, respectively Respectively.

That is, when the first and second assemblies 123 and 125 are separated from the nozzle body 121, the nozzle body 121 is divided into a plurality of nozzle pieces 122 .

When the nozzle body 121 is separated into the plurality of nozzle pieces 122 as described above, the resin injection holes h in the nozzle 120 are inserted into the respective nozzle pieces 122 in the form of resin injection grooves 122a As shown in FIG.

When the resin injection hole h in the nozzle 120 is exposed to the outside in the form of the resin injection groove 122a in each nozzle piece 122, the resin injected into the resin injection hole h, The maintenance of the nozzle 120 can be easily performed, and the time required for maintenance and repair of the nozzle 120 can be reduced.

In addition, when a part of the nozzle piece 122 is solidified on the resin injection hole h or damaged or damaged due to the resin adhering to the resin injection hole h, the nozzle 120 is not damaged, Only the nozzle 122 needs to be replaced. Thus, the maintenance cost of the nozzle 120 can be reduced.

The hot runner apparatus 100 for injection molding according to the present embodiment having the nozzle 120 having the above-described configuration can be configured so that the nozzle 120 can be separated into a plurality of nozzle pieces 122, Even if resin is injected into the nozzle 120 and the resin injection hole h is blocked, the nozzle 120 can be separated to easily remove the residue blocking the resin injection hole h, There is an effect that the injection workability is excellent with respect to the resin which is liable to be burned because the melting temperature range is narrow.

In addition, the hot runner apparatus 100 for injection molding according to the present embodiment has a configuration in which the nozzle 120 can be separated into a plurality of nozzle pieces 122, thereby facilitating the maintenance work, It is possible to reduce the cost and time required for the operation.

Here, the nozzle 200 having the above-described structure is merely a preferred embodiment of the present invention, and various embodiments can be substituted for them.

FIG. 5 is an exploded perspective view of a nozzle according to another embodiment of the present invention, FIG. 6 is an exploded perspective view illustrating a nozzle piece according to another embodiment of the present invention, and FIG. Sectional view of a nozzle according to an embodiment of the present invention.

Here, the same reference numerals as those shown in the drawings denote the same members having the same function, and a duplicate description will be omitted here.

5 to 7, the nozzle 220 according to another embodiment of the present invention includes a nozzle body 221, a first coupling member 123, and a fastening member 227.

The nozzle body 221 is formed by combining a plurality of nozzle pieces 222, 224 which are detachably coupled to each other at a coupling position. In this embodiment, two nozzle pieces 222 and 224 are combined to form a nozzle body 221 in combination.

The nozzle pieces 222 and 224 are formed to have a shape that forms a part of the nozzle body 221. The nozzle pieces 222 and 224 are formed in such a manner that the nozzle body 221 is cut into two portions around an imaginary line extending along the longitudinal direction of the resin injection hole h.

In each of the nozzle pieces 222 and 224 formed as described above, a resin injection groove 122a is formed concavely. The resin injection grooves 122a formed in the respective nozzle pieces 222 and 224 are connected to each other to form the resin injection holes h when the nozzle pieces 222 and 224 are combined at the coupling positions.

That is, when the plurality of nozzle pieces 222 and 224 are combined at the coupling position, the resin injection hole h is formed by combining the resin injection grooves 122a formed in the nozzle pieces 222 and 224, As shown in FIG.

One side of the nozzle body 221 which is a combination of the plurality of nozzle pieces 222 and 224 communicates with the manifold 110 (see FIG. 1) and the other side of the nozzle body 221 communicates with the cavity plate 4 (See Fig. 1).

The resin injection hole h formed in the nozzle body 221 forms a passage in which one side communicates with the manifold 110 and the other side communicates with the cavity plate inside the nozzle body 221 .

The first coupling member 123 is coupled to one side of the nozzle body 221 and restricts one side of each of the nozzle pieces 222, 224 combined to the coupling position. Since the structure and operation of the first coupling member 123 are the same as those in the above-described embodiment, a detailed description thereof will be omitted.

The fastening member 227 is coupled to the other side of the nozzle body 221 to couple the other side of the nozzle pieces 222 combined to the engagement position.

A fastening hole n is formed in each of the nozzle pieces 222 and 224 so that the fastening member 227 is fastened to the other side of the nozzle body 221.

Each of the fastening holes n is formed so as to pass through the respective nozzle pieces 222 and 224 and each of the fastening holes n formed so as to penetrate through the respective nozzle pieces 222 has a shape in which the nozzle pieces 222, And may be formed to be connected to each other when they are in a combined state.

The fastening member 227 can be fastened to the other side of the nozzle body 221 through the fastening holes n connected to each other when the nozzle pieces 222 and 224 are combined at the engagement positions.

At this time, the coupling between the fastening member 227 passing through the fastening hole (n) and the nozzle body 221 can be achieved by screwing.

The connection between the fastening member 227 and the nozzle pieces 222 and 224 may be formed at a plurality of positions along the length direction of the nozzle body 221.

According to the present embodiment, the groove 222b is recessed in one of the nozzle pieces 222 out of the two nozzle pieces 222 and 224 which are coupled to each other at the coupling position to form the nozzle body 221, A protrusion 224b engaging with the groove 222b is formed to protrude from the nozzle piece 224. [

The grooves 222b and the protrusions 224b are formed to have lengths extending along the longitudinal direction of the nozzle pieces 222 and 224. The nozzle pieces 222b and the protrusions 224b, 222 and 224 can be guided to a position where they are combined into the engagement position by engagement of the groove portion 222b and the projection portion 224b.

In other words, the two nozzle pieces 222 and 224 can be combined into the engagement position by merely engaging the groove portion 222b and the projection portion 224b.

The groove portion 222b and the protruding portion 224b are formed so as to be disposed outside the resin injection hole h. The engagement structure formed by the groove portion 222b and the protrusion portion 224b thus formed has a hermetic structure for preventing the resin introduced into the resin injection hole h from leaking through the joining portion between the nozzle pieces 222 and 224 The airtightness performance of the nozzle 220 can be improved by forming it on the outside of the resin injection hole h.

The nozzle pieces 222 and 224 can be guided to a position where the fastening holes n formed in the nozzle pieces 222 and 224 are connected to each other by the engagement of the groove portion 222b and the projection portion 224b.

That is, only the operation of engaging the groove portion 222b and the projection portion 224b allows the two nozzle pieces 222 and 224 to be combined into the engagement position, and the fastening holes n formed in the nozzle pieces 222 and 224 are connected to each other Position.

So that the fastening member 227 can be coupled through the two nozzle pieces 222 and 224 combined to the coupling position through the fastening holes n connected to each other. The nozzle pieces 222 and 224 are coupled with each other in a direction in which the nozzle pieces 222 and 224 are in close contact with each other by the coupling of the fastening member 227 and the nozzle pieces 222 and 224.

At this time, since the two nozzle pieces 222, 224 coupled to each other are pressed while being pressed in a direction in which they are closely contacted with each other by the fastening member 227, the joining portions between the nozzle pieces 222, Can be further improved.

In other words, the nozzle 220 of the present embodiment has the airtight structure formed by the engagement of the groove portion 222b and the protruding portion 224b, and the coupling structure formed by fastening the nozzle pieces 222 and 224 and the fastening member 227, It is possible to provide an improved airtight performance so as to effectively prevent the resin introduced into the injection hole (h) from leaking through the joining portion between the nozzle pieces (222, 224).

The nozzle 220 of the present embodiment may further include a temperature measurement unit 229 for measuring the temperature of the nozzle 220. In this embodiment, the temperature measuring unit 229 is illustrated as being equipped with a thermocouple that contacts the nozzle body 221 and measures the temperature of the nozzle 220.

The temperature of the nozzle 220 measured by the temperature measuring unit 229 is adjusted by controlling the temperature of the nozzle 220 so that the temperature of the nozzle 220 can be maintained at a proper temperature at which the resin flowing through the nozzle 220 does not harden or burn. 140 as well as to control the operation of the apparatus.

In one of the nozzles 224, an insertion groove 224c into which the temperature measuring portion 229 is inserted is concave.

The temperature measurement unit 229 can be stably inserted and fixed to the outer surface of the nozzle piece 224 while being guided in the coupling position with the nozzle piece 224 through the insertion groove 224c formed as described above .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the true scope of protection of the present invention should be defined by the following claims.

100: Hot runner device for injection molding 110: Manifold
111: Resin passage 120, 220: Nozzle
121, 221: nozzle body 121a:
121b: screw-engaging portions 122, 222, 224:
122a: resin injection groove 123: first coupling body
125: second combination body 125a: cover part
125b: cover coupling portion 130: opening /
131: Piston 133: Cylinder
140: Heating coil 145: Coil cover
222b: groove portion 224b:
224c: insertion groove 227: fastening member
229: Temperature measuring unit

Claims (14)

A manifold in which a resin moving path is formed in which a resin moves;
A nozzle which is provided in the manifold so that the resin injection hole communicates with the resin transfer passage and injects the resin introduced from the manifold into the injection mold; And
And an opening / closing part for opening / closing the nozzle,
A nozzle body having a plurality of nozzle pieces detachably coupled to each other at a coupling position, one side communicating with the manifold and the other side communicating with the injection mold; And
And a first coupling unit coupled to one side of the nozzle body and restricting one side of each of the nozzle pieces combined at the coupling position,
Wherein the nozzle body includes two nozzle pieces detachably coupled to each other at the coupling position,
The groove portion is recessed in the nozzle piece of any one of the two nozzle pieces so as to have a length extending along the longitudinal direction of the nozzle piece,
Wherein a protrusion engageable with the groove is formed on the nozzle piece of the other of the two nozzle pieces so as to have a length extending along the longitudinal direction of the nozzle piece.
The method according to claim 1,
A resin injection groove is formed concavely in the nozzle piece;
Wherein the resin injection hole is formed inside the nozzle body by combining the plurality of resin injection grooves when the plurality of nozzle pieces are combined at the engagement position.
The method according to claim 1,
Wherein the first coupling member is pressed against one side of the nozzle body so as to surround the outer circumferential surface of the nozzle body so as to press one side of each of the nozzle pieces combined at the coupling position in a direction in close contact with each other. Hot runner device.
The method of claim 3,
Wherein a first engaging portion is formed on an outer circumferential surface of one side of the nozzle body,
Wherein the fitting portion is tapered so that a circumferential length of the fitting portion gradually expands along a direction in which the first coupling member is slidable and invisible.
The method according to claim 1,
Wherein the nozzle further comprises a second coupling member coupled to the other side of the nozzle body and restricting the other side of each of the nozzle pieces combined at the coupling position.
6. The method of claim 5,
Wherein the second coupling member is coupled to the other side of the nozzle body so as to surround the nozzle body and fixes the other side of each of the nozzle pieces combined to the engagement position.
The method according to claim 6,
A threaded portion is formed on the outer circumferential surface of the other side of the nozzle body,
Wherein the second coupling member includes a cover portion that surrounds and accommodates each nozzle piece combined with the engagement position and a cover engagement portion that is formed on an inner circumferential surface of the cover portion and is engaged with the screw engagement portion, Hot runner device.
The method according to claim 1,
Further comprising a heating coil installed on the nozzle to heat the nozzle.
The method according to claim 1,
Wherein the nozzle further comprises a fastening member fastened to the other side of the nozzle body and coupling the plurality of nozzle pieces combined to the engagement position;
And each of the nozzle pieces is formed with a fastening hole through which the fastening member is fastened.
delete The method according to claim 1,
Wherein the groove portion and the protrusion portion are formed so as to be disposed outside the resin injection hole.
The method according to claim 1,
Wherein the two nozzle pieces are guided to a position where they are combined into the engagement position by engagement of the groove portion and the protrusion portion.
10. The method of claim 9,
Wherein the two nozzle pieces are guided to a position where the fastening holes formed in the respective nozzle pieces are connected to each other by engagement of the groove portion and the projecting portion.
The method according to claim 1,
Further comprising: a temperature measuring unit for measuring a temperature of the nozzle;
Wherein one of the nozzle pieces is formed with an insertion groove into which the temperature measuring unit is inserted concavely.
KR1020150065119A 2015-05-11 2015-05-11 Hot runner apparatus for injection molding KR101628243B1 (en)

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KR1020150065119A KR101628243B1 (en) 2015-05-11 2015-05-11 Hot runner apparatus for injection molding
PCT/KR2016/001178 WO2016182169A1 (en) 2015-05-11 2016-02-03 Hot runner apparatus for injection molding

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Publication number Priority date Publication date Assignee Title
CN115179509A (en) * 2022-07-06 2022-10-14 盐城川流汽车配件有限公司 Hot runner injection molding system and process for interior trim part of automobile instrument panel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0724891A (en) * 1993-07-13 1995-01-27 Taiho Kogyo Kk Hot rubber for injection molding plastic
KR20030019437A (en) * 2000-06-16 2003-03-06 몰드-마스터스 리미티드 Thermally balanced hot runner nozzle
JP2003513817A (en) * 1999-11-08 2003-04-15 ディー−エム−イー・カンパニー Flow nozzle for injection molding
JP2010082950A (en) * 2008-09-30 2010-04-15 Murata Mfg Co Ltd Preplasticating injection molding machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100626561B1 (en) * 2004-12-15 2006-09-25 허남욱 Hot runner valve nozzle for molding plastics assembling and disassembling lower part

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0724891A (en) * 1993-07-13 1995-01-27 Taiho Kogyo Kk Hot rubber for injection molding plastic
JP2003513817A (en) * 1999-11-08 2003-04-15 ディー−エム−イー・カンパニー Flow nozzle for injection molding
KR20030019437A (en) * 2000-06-16 2003-03-06 몰드-마스터스 리미티드 Thermally balanced hot runner nozzle
JP2010082950A (en) * 2008-09-30 2010-04-15 Murata Mfg Co Ltd Preplasticating injection molding machine

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