KR101738617B1 - partial foam-injection and foam-injection molding mold - Google Patents

partial foam-injection and foam-injection molding mold Download PDF

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Publication number
KR101738617B1
KR101738617B1 KR1020150091747A KR20150091747A KR101738617B1 KR 101738617 B1 KR101738617 B1 KR 101738617B1 KR 1020150091747 A KR1020150091747 A KR 1020150091747A KR 20150091747 A KR20150091747 A KR 20150091747A KR 101738617 B1 KR101738617 B1 KR 101738617B1
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KR
South Korea
Prior art keywords
core
cavity
lower plate
mold
product
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Application number
KR1020150091747A
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Korean (ko)
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KR20170001968A (en
Inventor
김유용
김성화
Original Assignee
엠티코리아 주식회사
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Priority to KR1020150091747A priority Critical patent/KR101738617B1/en
Publication of KR20170001968A publication Critical patent/KR20170001968A/en
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Publication of KR101738617B1 publication Critical patent/KR101738617B1/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
    • B29C45/26—Moulds
    • B29C45/2602—Mould construction elements
    • 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
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • 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
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • B29C45/332—Mountings or guides therefor; Drives 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
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • B29C2045/338—Mould parts with combined axial and transversal movements

Abstract

More particularly, the present invention relates to a mold 1000 for partially unfrozen and foam injection molding. More specifically, when a product including a portion that does not require foaming is manufactured, since the operation core 400 is provided on the upper plate 100, The core 400 is operated in the same direction as the core back direction and the foam space is not ensured at the same time, so that the unfoamed and foamed molds are simultaneously realized. ).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a mold for partially unfoamed and foam-

The present invention relates to a mold for partially unfoamed and foamed injection molding, and more particularly, to a mold for forming a partially unfoamed and foamed injection molded article, So that the foam space can not be ensured and thus the unfoamed and foamed articles can be realized at the same time.

Generally, an injection mold apparatus is an apparatus for producing a resin product in a form corresponding to a cavity of a mold by injecting a molten resin into the mold.

The injection mold apparatus includes a first mold and a second mold coupled to each other with a cavity having a shape corresponding to the shape of a product to be manufactured, and an injection apparatus for injecting a molten resin into the cavity, And the molten resin injected into the cavity is cooled and solidified to produce a resin product having a shape corresponding to the cavity.

Among such injection molding apparatuses, there is an injection mold apparatus for producing a foamed resin product by causing the molten resin to bubble in the cavity.

As an example, referring to FIG. 1, an injection mold apparatus 10 includes an injection mold apparatus 10 having a first mold surface 11a provided with a first mold surface 11a, as disclosed in Korean Unexamined Patent Publication No. 2002-0029599 (" A second mold 12 provided with a second mold surface 12a which is coupled to the first mold 11 and forms the cavity 13 together with the first mold surface 11a; And an injection apparatus 14 for injecting the molten resin into the cavity 13 formed by the first mold surface 11a and the second mold surface 12a.

However, such a prior art document has a problem that it is difficult to apply to a built-in trim or a door trim where the outer appearance is entirely exposed due to occurrence of a parting line in the appearance of the product.

Particularly, parts such as a door trim of a speaker grill in a built-in trim are in the form of a mesh, so that there is a troublesome problem of separately performing punching work after foam molding.

Korean Public Patent No. 2012-0029599 (Published on March 27, 2012)

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method of manufacturing a product, Which is operated in the same direction as that of the unfoamed and foamed injection molding, and thus the unfoamed and foamed portions are realized at the same time.

According to an embodiment of the present invention, a mold for partially unfoamed and foamed injection molding is provided with a depression on a lower surface thereof. The inner surface of the depression is formed by a first cavity surface 110 of the product, 120) is formed on the upper surface of the upper plate (100); The upper surface of the core 220 is formed as a second cavity surface 210 of the product and the lower surface of the lower plate 200 facing the first cavity surface 110 is formed with a protruded core 220. [ ; A cavity 300 formed between the upper plate 100 and the lower plate 200 and filled with the product material 10 and a single or plurality of cavities 300 communicating with the first cavity surface 110, And a working core (400) having a power means (500) for driving.

Further, the lower plate 200 is electrically driven by a cylinder device for moving the lower plate 200 by a predetermined distance in the opposite direction from the upper plate 100.

In addition, the power unit 500 is characterized in that the actuating core 400 is movable in the longitudinal direction.

Further, the working core 400 is characterized in that when the core is backed up, the power source 500 applies pressure in the same direction as the core back direction.

The product is characterized in that the unexposed portion 10a is formed by the partial unfoamed and foamed injection molding die 1000 by the area of the lower surface of the working core 400. [

The operation core 400 is inserted into a hole 130 penetrating the first cavity surface 110 and has a lower end face formed in a circular shape so as to surround the inner periphery of the hole 130 and the outer periphery of the operating core 400, Are brought into contact with each other with a predetermined clearance.

The power unit 500 is a device provided on the inner surface of the insertion hole 410 formed on the upper surface of the actuating core 400 and having a spring capable of moving up and down within the hole 130.

According to the present invention, there is provided a mold for partially unfoamed and foamed injection molding according to the present invention, in which a working core is provided on a top plate at the time of manufacturing a product including a portion which does not require foaming, So that the foamed space can not be ensured, so that the unfoamed and foamed forms can be realized at the same time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a mold according to an embodiment of the present invention; FIG.
2 is a cross-sectional view of a mold according to an embodiment of the present invention;
3 is a cross-sectional view of a mold during foaming according to one embodiment of the present invention.
4 is a plan view of a top plate according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a mold 1000 for partially unfoamed and foamed injection molding according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The following drawings are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the following drawings, but may be embodied in other forms. In addition, like reference numerals designate like elements throughout the specification.

In this case, unless otherwise defined, technical terms and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the following description and the accompanying drawings, A description of known functions and configurations that may unnecessarily obscure the description of the present invention will be omitted.

FIG. 2 is a cross-sectional view of a mold 1000 according to an embodiment of the present invention, FIG. 3 is a cross-sectional view of a mold 1000 during foaming according to an embodiment of the present invention, Fig. 2 is a plan view of the upper plate 100 according to the first embodiment.

2, a depression is formed on a lower surface of the product, and an inner surface of the depression is formed of a first cavity surface 110 of the product, and an inlet 120 of the product material 10 is formed in a top plate 100); The upper surface of the core 220 is formed as a second cavity surface 210 of the product and the lower surface of the lower plate 200 facing the first cavity surface 110 is formed with a protruded core 220. [ ; A cavity 300 formed between the upper plate 100 and the lower plate 200 and filled with the product material 10 and a single or plurality of cavities 300 communicating with the first cavity surface 110, And a working core 400 equipped with power means 500 for driving.

In other words, the mold 1000 according to the present invention may be a mold 1000 including a lower plate 200 and an operating core 400 which are movable forward and backward with respect to the upper plate 100 and the upper plate 100 have.

Hereinafter, the mold 1000 shown in Fig. 2 is used as the mold 1000 of the partially unfoamed and foamed injection-molding mold 1000, but the present invention is not limited to the mold 1000. Fig.

A first cavity surface 110 and a second cavity surface 210 may be formed to configure the cavity 300 formed between the upper plate 100 and the lower plate 200.

Here, the first cavity surface 110 and the second cavity surface 210 are not limited to the shape according to the present invention, but may be variously embodied.

A first cavity surface 110 and a second cavity surface 210 may be formed to configure the cavity 300 formed between the upper plate 100 and the lower plate 200.

Here, the first cavity surface 110 and the second cavity surface 210 are not limited to the shapes according to the present invention, but may be variously embodied.

The lower plate 200 may be electromagnetically moved by a predetermined distance in the opposite direction from the upper plate 100.

The apparatus can be operated by an electric motor, that is, as a means for moving the lower plate 200 during core back. At this time, more precise numerical movement can be achieved by using the operating means electrically.

Accordingly, the apparatus can be provided with a more accurate core back due to a much smaller error range than the hydraulic or toggle operation, so that the quality of the product can be improved.

Here, the core back may mean a method in which the product material 10 is injected into the mold 1000 and finely opened by a predetermined distance through the control of an injection machine.

In other words, after the lower plate 200 is joined to the upper plate 100, the product material 10 is injected into the cavity 300, and then the lower plate 200 is moved in a direction opposite to the upper plate 100 The product material 10 may be foamed by finely separating the product material 10 by a set distance.

In addition, since the inner surface of the upper plate 100 abuts against the outer surface of the core, the cavity 300 can be closed even when the mold is finely shaped, so that no parting surface is formed, have.

The power means 500 may be a device for expanding and contracting the working core 400 in the longitudinal direction.

Accordingly, the power unit 500 may be provided as a gas spring, and the present invention is not limited thereto.

The gas spring includes a body part 520 inserted into the inner insertion hole 410 of the actuating core 400 and a piston rod part 510 coupled to the body part 520 to be vertically movable. .

One end of the piston rod 510 is screwed to the inner surface of the actuating core 400 to exert downward force on the actuating core 400.

The other end of the body part 520 may be connected to the power unit 500 by being coupled to an upper holder for fixing the upper plate 100, though not shown.

The power unit 500 may be equipped with various devices for transmitting pressure to the gas spring, and a detailed description thereof will be omitted.

In addition, according to the embodiment of the present invention, the aspect ratio of the mold 1000 and the detailed configurations may be different from the actual ratio.

In addition, the power means 500 of FIG. 2 may be in a compressed state.

Referring to FIG. 3, the working core 400 may be configured to apply pressure in the direction of core back by the power means 500 during core back, that is, in the same direction as the moving direction of the lower disk.

In addition, in one embodiment of the present invention, one end surface of the actuating core 400 is circular, but it is not limited thereto and may be implemented in various shapes according to the use.

Further, the power means 500 of FIG. 3 may be subjected to pressure in the expanded state in the expanded direction.

4, the first cavity surface 110 is formed with a hole 130 (see FIG. 4) that is formed with a minimum clearance with the outer circumference of the actuating core 400 so that the actuating core 400 can be moved up and down. May be formed.

In other words, when the lower plate 200 is finely moved in the direction opposite to the upper plate 100 and at the same time when the core is backed up, at the same time, by the elastic force of the power means 500, (200), and pressure can be applied.

Accordingly, the product can be formed with the unexposed portion 10a by the partial unfoamed and foamed injection molding die 1000 by the area of the lower surface of the working core 400, As shown in FIG.

The metal mold 1000 for partially unfoamed and foamed injection molding can be easily made into a grill hole such as a speaker grill.

For example, if injection molding is performed by forming projections on the upper plate 100, burrs may be formed between the projections and the lower plate, so a secondary operation may be required.

However, the mold for partial unfoamed and foam injection molding 1000 is in a state in which the working core 400 equipped with the power means 500 is pressed against the upper surface of the lower plate, And the non-emergence portion 10a can prevent the occurrence of burrs, so that a secondary operation may not be required.

Therefore, the quality of the product is excellent, and the production cost and manufacturing process can be reduced and the productivity can be improved as the secondary operation is unnecessary.

In detail, the product material 10 is injected into the cavity 300 through the material injection port 120, that is, the foamed resin material is injected into the cavity 300 in the molten state into the material injection port 120 .

At this time, the foamed resin raw material is a mixture of the raw resin and the foaming agent. The raw material resin is not particularly limited as long as it is a thermoplastic resin, and the temperature at the time of injection is not particularly limited as long as it is a temperature at which the raw material resin is melted.

The foaming agent is for foaming the raw resin when the lower plate 200 is core backed. Examples of such foaming agents include nitrogen gas, chemical foaming agents that generate carbon dioxide gas, supercritical fluids, and the like.

Then, the lower plate 200 is core back by a predetermined distance, and the actuating core 400 can be brought into close contact with the lower plate 200 by the power unit 500. Here, when the lower plate 200 is core backed, the raw resin in the cavity 300 may be foamed.

The mold 1000 for partially unfoamed and foamed injection molding according to the present invention has the operation core 400 on the upper plate 100 at the time of manufacturing a product including a portion that does not require foaming, The working core 400 is operated in the same direction as the core back direction at the same time as the back-up time, so that the foaming space can not be ensured.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

Therefore, it is to be understood that the subject matter of the present invention is not limited to the disclosed embodiments, and all of the equivalents or equivalents of the claims are covered by the scope of the present invention will be.

10: Product material 10a:
100: Sennon plate 200: Lower plate
300: cavity 400: working core 500: power means
110: first cavity surface 120: material inlet
130: hole 210: second cavity face
220: Core 410: Insertion hole
510: piston rod part 520:
1000: Mold

Claims (7)

A top plate 100 formed with a depression on a lower surface thereof and having an inner surface of the depressed portion formed by a first cavity surface 110 of the product and an injection port 120 of the product material 10 formed through the upper surface;
A top surface of the core 220 is formed as a second cavity surface 210 of the product and faces the first cavity surface 110 so that the upper surface of the upper surface of the upper surface A lower plate 200 which is opened in an opposite direction from the lower plate 100 to foam the product material 10;
A cavity 300 formed between the upper plate 100 and the lower plate 200 and filled with the product material 10;
A single or a plurality of openings communicating with the first cavity surface 110 are provided on the upper plate 100 and power means 500 for driving is provided on the upper plate 100, And a working core 400 which is moved to the lower plate 200 and brought into close contact with the lower plate 200,
Characterized in that a hole of the product is formed such that the working core (400) is in close contact with the lower plate (200) to correspond to the volume occupied by the working core (400) in the cavity (300) A mold for foam injection molding (1000).
The method according to claim 1,
Wherein a cylinder device for moving the lower plate (200) by a predetermined distance in the opposite direction from the upper plate (100) is electrically driven.
The method according to claim 1,
Wherein the power means (500) allows the actuating core (400) to move longitudinally. ≪ RTI ID = 0.0 > 11. < / RTI >
The method according to claim 1,
Wherein the working core (400) applies a pressure in the same direction as the core back direction by the power means (500) during core backing.
The method according to claim 1,
Characterized in that the product is formed with the unfoamed portion (10a) by the area of the bottom surface of the working core (400) by the partially unfoamed and foamed injection molding die (1000) (1000).
The method according to claim 1,
The operation core 400 is inserted into the hole 130 penetrating the first cavity surface 110 and the lower end surface is circular so that the inner periphery of the hole 130 and the outer periphery of the working core 400 are fixed (1000) for partial unfoamed and foamed injection molding.
The method according to claim 6,
Characterized in that the power means (500) is a device provided on the inner surface of the insertion hole (410) formed on the upper surface of the working core (400) and having a spring capable of moving up and down within the hole (130) And a mold (1000) for foam injection molding.
KR1020150091747A 2015-06-29 2015-06-29 partial foam-injection and foam-injection molding mold KR101738617B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150091747A KR101738617B1 (en) 2015-06-29 2015-06-29 partial foam-injection and foam-injection molding mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150091747A KR101738617B1 (en) 2015-06-29 2015-06-29 partial foam-injection and foam-injection molding mold

Publications (2)

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KR20170001968A KR20170001968A (en) 2017-01-06
KR101738617B1 true KR101738617B1 (en) 2017-05-22

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102347075B1 (en) * 2017-05-23 2022-01-05 현대자동차주식회사 Partially Unfoamed And Foamed Injection Molding Dies With Separate Cooling Cores

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007030441A (en) * 2005-07-29 2007-02-08 Toyoda Gosei Co Ltd Manufacturing method of resin molding
JP2007216532A (en) 2006-02-17 2007-08-30 Mitsuboshi Kaseihin Kk Foamed resin, interior part for automobile, and manufacturing method for foamed resin
JP2008044143A (en) 2006-08-11 2008-02-28 Kasai Kogyo Co Ltd Method for molding laminated molding

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120029599A (en) 2010-09-17 2012-03-27 삼성전자주식회사 Injection mold apparatus and manufacturing method for foam resin product

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007030441A (en) * 2005-07-29 2007-02-08 Toyoda Gosei Co Ltd Manufacturing method of resin molding
JP2007216532A (en) 2006-02-17 2007-08-30 Mitsuboshi Kaseihin Kk Foamed resin, interior part for automobile, and manufacturing method for foamed resin
JP2008044143A (en) 2006-08-11 2008-02-28 Kasai Kogyo Co Ltd Method for molding laminated molding

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