KR20100064932A - Injection molding device for buckle - Google Patents

Injection molding device for buckle Download PDF

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Publication number
KR20100064932A
KR20100064932A KR1020080123586A KR20080123586A KR20100064932A KR 20100064932 A KR20100064932 A KR 20100064932A KR 1020080123586 A KR1020080123586 A KR 1020080123586A KR 20080123586 A KR20080123586 A KR 20080123586A KR 20100064932 A KR20100064932 A KR 20100064932A
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KR
South Korea
Prior art keywords
slide
mold
core
buckle
manufacturing
Prior art date
Application number
KR1020080123586A
Other languages
Korean (ko)
Other versions
KR101019553B1 (en
Inventor
이춘희
Original Assignee
대진화학 주식회사
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Filing date
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Priority to KR1020080123586A priority Critical patent/KR101019553B1/en
Publication of KR20100064932A publication Critical patent/KR20100064932A/en
Application granted granted Critical
Publication of KR101019553B1 publication Critical patent/KR101019553B1/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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4471—Removing or ejecting moulded articles for undercut articles using flexible or pivotable undercut forming 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
    • B29C45/03—Injection moulding apparatus
    • B29C45/04—Injection moulding apparatus using movable moulds or mould halves
    • 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
    • B29C45/2681—Moulds with rotatable 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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4435—Removing or ejecting moulded articles for undercut articles using inclined, tiltable or flexible undercut forming elements driven by the ejector means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R2022/1806—Anchoring devices for buckles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices

Abstract

PURPOSE: An injection molding device for manufacturing a buckle is provided to minimize the mold structure and size by employing both sliding and rotation methods on the undercut forming part. CONSTITUTION: An injection molding device for manufacturing a buckle comprises a movable mold(14), a fixed mold(15), a slide core(16), a rotating core(20), and a slide member(21). The movable mold and the fixed mold are meshed from the top and the bottom to form a cavity(13). The slide core is assembled and slid inside the mold cavity in order to form the rear side of a buckle. The rotating core has an undercut forming projection(19) which is inserted to or removed from the undercut forming part of the cavity through the rotation. The slide member is connected to the rotating core and rotates the rotating core.

Description

Injection molding device for buckle {Injection molding device for buckle}

The present invention relates to a mold apparatus for injection molding a buckle used in a seat belt of an automobile, and more particularly, after injection molding a buckle product having an undercut shape, the molded article can be easily taken out of the mold. The present invention relates to a mold apparatus for manufacturing a buckle that can simplify the structure and lower the manufacturing cost.

In general, automobiles are equipped with airbags and seat belts as safety devices that can promote driver and passenger safety. Among them, seat belts come into contact with structures inside the vehicle by restraining the body of the driver and the passenger sitting on the seat during an accident. It prevents or bumps.

That is, the seat belt secures both ends of the webbing having a constant width to the floor panel and the center pillar, and prevents the driver or the passenger from being thrown forward or in the direction of the accident in the event of an accident. .

These seat belts are composed of webbing, retractor, tongue and buckle that are fastened to each other.

Usually the buckle of the seat belt is made of a plastic injection molding, as shown in Figure 1, consists of a front cover 10 and the rear cover 11, by the combination of these forms a buckle.

Here, reference numeral 12 denotes an undercut portion.

The buckle is manufactured by an injection molding method using an injection mold, and the injection method is a product formed by injecting and cooling a high temperature liquid resin into a cavity provided between a stationary plate and a movable plate, and then forming the movable plate. It is a method of removing the molded product from the cavity by opening the mold by moving it.

If there is no undercut in the injection molding, it is possible to take out the work while reciprocating the movable plate in the vertical direction.However, if there is an undercut in the product, the moving mold must be moved in the vertical direction and its orthogonal direction. This is possible

For example, undercut refers to a concave portion where it is difficult to eject the molded article only by the movement of the mold closing or mold opening direction of the injection mold. The undercut portion is not only easy to take out the product but also takes out the product from the part where the undercut is formed. In some cases, the product may be defective due to contact or collision with the mold.

Therefore, in the related art, in order to easily take out a molded article having such an undercut, an undercut of the molded article is formed in the mold body, and at the same time, a slide core capable of sliding is provided to peel off the portion.

An undercut is formed in the product by the slide core, and when the slide core is slid and separated from the product, the product can be taken out.

However, in the case of a mold apparatus having such a sliding method, the shape of the molded article is complicated, and when a plurality of slide cores are applied, the structure becomes very complicated.

In addition, a variety of devices have been developed for easy extraction of the injection molding having an undercut, such a split core method, finger pin method, dogleg cam method, group extraction method and the like.

However, when the above-described method is used, the internal structure of the injection mold becomes complicated, and a lot of cost and time are consumed, and the injection mold with a large number of parts has various problems in that various failures occur.

Therefore, when molding a molded article having an undercut through injection molding, there is always a need for a mold apparatus that can safely and easily take out the molded article from the mold so that the breakage of the undercut formed portion does not occur. It is required.

Accordingly, the present invention has been made in view of the above, by implementing a new type of mold apparatus for molding the undercut portion of the product by using a rotary core that combines a slide method and a rotation method, the product is easy to take out And it can be made safely, as well as to simplify the overall structure of the mold to provide a mold device for manufacturing a buckle that can reduce the mold manufacturing cost.

In order to achieve the above object, the mold apparatus for manufacturing a buckle provided in the present invention includes a movable mold and a stationary mold, which are vertically joined to each other to form a cavity, a slide core slide-combined in a mold for forming the rear portion of the buckle, and one side of the fixed mold. Rotating core which is rotatably installed by a hinge pin and has an undercut forming protrusion for entering and exiting the undercut forming portion of the cavity through the rotation operation, a slide member for rotating in conjunction with the rotating core Characterized in that it comprises a form containing.

Here, it is preferable that the rotatable core and the slide member be interlocked with each other using a coupling structure between the pin and the slot having the lower end and the front end.

In addition, the rotatable core, the slide core, the slide member, the slide block as a whole it is desirable to be able to operate while being interlocked by the drive block operating up and down.

The mold apparatus for manufacturing a buckle provided by the present invention has an advantage of allowing the core to be easily and completely escaped from the undercut portion of the finished product by the linkage operation of the slide member and the rotatable core. .

In particular, by introducing a new concept that combines the slide method and the rotation method to apply to the undercut molding part, the overall structure of the mold can be simplified, and the mold manufacturing cost can be reduced and the operation can be reduced. However, there is an advantage that can be efficiently handled.

In addition, by operating the rotary core for forming the undercut portion of the product has a structure that interlocks with the operation of the slide core at a time difference, the core can be separated from the product without a separate driving source, accordingly the driving force of the injection molding mold There is an effect that can be minimized.

In addition, in the present invention, the rotary core may be operated at a time difference by the operation of separating the slide core, so that a product having various undercuts and shapes may be manufactured as a simple injection molding mold.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing a mold apparatus for manufacturing a buckle according to an embodiment of the present invention, Figure 3 is a cross-sectional view showing a mold apparatus for manufacturing a buckle according to an embodiment of the present invention.

As shown in Figures 2 and 3, the mold manufacturing device for the buckle using the interlocking structure between the rotating core 20 and the slide member 21 during the buckle injection molding to effectively mold and easily take out the undercut portion. It is made in such a way that it can.

In addition, by applying a mechanism for interlocking the rotatable core 20 and the slide member 21 in association with the overall operation of the mold, it is possible to operate the core and the member for the undercut molding without a separate drive source.

To this end, an upper movable mold 14 having a buckle-shaped cavity 13 and an undercut molding 18 and a lower fixed mold 15 are provided, and the movable mold 14 and the fixed mold ( On both sides of 15, slide blocks 24 and drive blocks 25 for operating the cores are arranged.

Here, the cavity 13 and the undercut molding portion 18 may be provided with a total of four pairs, one pair on each side, according to the present invention provides a mold apparatus capable of manufacturing four buckles in one injection molding. .

At this time, the drive block 25 may be operated up and down while being connected to a mold moving device (not shown) side, such as a press, and the slide block 24 is in sliding contact with the drive block 25 and the forward operation or spring, etc. Receiving the elastic support of the reverse operation can be done.

For example, the slide block 24 is always forced to fall backward by the force of the spring, and moves to the front by contact transmission with the drive block 25 to show an operating state to be combined with the mold side. Can be.

Each block is provided with slide inclined surfaces 26a and 26b for interlocking between the slide block 24 and the driving block 25.

That is, the slide block 24 and the driving block 25 are combined with the slide inclined surfaces 26a and 26b which each has in a state of facing each other, and thus the slide inclined surface 26a when the driving block 25 is operated up and down. ), 26b is in contact with each other so that the slide block 24 can move back and forth.

In addition, the drive block 25 and the slide block 24 is provided with a guide pin 28 and a guide hole 27 as a means for maintaining a more accurate transmission relationship during contact transmission between each other.

For example, the driving block 25 and the slide block 24 are formed with guide pins 28 and guide holes 27 having the same inclination angle as the slide inclined surfaces 26a and 26b, respectively. Since the guide pin 28 and the guide hole 27 serve as guides while being inserted or removed from each other in contact transmission between blocks, the contact transmission between the drive block 25 and the slide block 24 can be more reliably performed. do.

In addition, the slide core 16 for forming the back portion of the buckle is formed integrally on the front of the slide block (24).

At this time, the slide core 16 enters from the side of the movable mold 14 and the stationary mold 15 together with the operation of the slide block 24 when the mold is coalesced to be combined, and the rear surface of the buckle, a portion of the upper surface of the buckle, and an upper portion of the undercut portion. Serves as a core to mold.

The present invention provides a rotatable core 20 and a slide member 21 as a means for shaping the undercut portion of the buckle.

The rotatable core 20 has an undercut molding protrusion 19 which can enter the undercut molding portion 18 into the stationary mold 15, and is hinged on the stationary mold 15 by a hinge pin 17. It is fastened and installed in a structure that rotates around the hinge pin 17 at this time as a central axis.

In addition, the lower end of the rotatable core 20 is formed with a pin (22) extending horizontally from the side of the body toward the front, so that the pin 22 can be interlocked with the slide member (21) at this time do.

The slide member 21 is a portion that substantially rotates the rotatable core 20 and is integrally formed on the front surface of the slide block 24 so that the slide member 21 can move back and forth with the operation of the slide block 24. It is.

The rotatable core 20 and the slide member 21 are interlocked with each other by a coupling structure between the pins 22 and the slots 23 at the lower and front ends thereof.

For example, the pin 22 formed at the lower end of the rotatable core 20 is fitted into the slot 23 at the tip of the slide member 21, so that the slide member 21 is moved forward or backward. The rotatable core 20 may be rotated by the locking action between the pin 22 and the slot 23.

Here, in the case of the rotatable core 20 through the one-way spring (not shown) for returning itself, the pin 22 and the slot 23 are caught only when the slide member 21 is retracted while the rotatable core The rotating core 20 and the slide member 21 can be interlocked with each other only when the 20 can be rotated, that is, taken out after the undercut molding, and the rotatable core 20 is again provided for the undercut molding. When returning, it is desirable to be able to return while being rotated by the force of the spring.

In particular, the present invention provides an operation manner in which a time difference is provided between the pulling-out operation of the slide member 21 and the rotating operation of the rotatable core 20 when the product is taken out.

To this end, by placing a gap G between the pins 22 of the rotatable core 20 and the slots 23 of the slide member 21 at a predetermined interval, the slide member 21 should fall behind a certain distance. As the rotatable core 20 is rotated, it can be pulled out of the undercut molding part.

That is, before the undercut forming projection 19 of the rotatable core 20 for the undercut forming is pulled out of the undercut portion, the upper slide core 16 is first pulled out, and then there is a time difference. The shape of the can be molded into a more accurate shape without a defect, and the operation between the core can be made more smoothly when taken out.

Therefore, looking at the operation state of the mold apparatus for manufacturing a buckle configured as described above are as follows.

4A to 4D are cross-sectional views showing an operating state of a mold apparatus for manufacturing a buckle according to an embodiment of the present invention.

As shown in Figs. 4A to 4B, description of the overall operating state of the injection mold, such as coalescence and separation of the mold, filling of the resin, etc. will be omitted.

The movable mold 14 and the fixed mold 15 of the upper and lower sides and the slide core 16 of the side surface are combined to form the cavity 13 and the undercut molding part 18, and at the same time, the undercut of the rotatable core 20 The molding protrusion 19 is also filled with resin in the cavity 13 and the undercut molding part 18 of the mold in a state of entering the undercut molding part 18, and when the resin is cured after a certain time, the ejection process starts from this time. Proceed.

First, the movable mold 14 is moved upward and separated from the stationary mold 15, from which the drive block 25 also begins to move upward.

As the drive block 25 moves upward, the slide block 21 which is in contact transmission transmission with the drive block 25 is also reversed, so that the slide core 16 and the slide member 21 start reversing.

The rotary core 20 is not rotated by the play even when the slide member 21 is retracted while the slide core 16 is first removed from the mold side.

After the slide core 16 is completely removed, rotation of the rotary core 20 is started by interlocking by the engagement between the slide member 21 and the rotary core 20, and the slide member 21 is rearward. At the same time, the rotatable core 20 is also completely rotated by approximately 45 ° while the undercut forming protrusions 19 in the undercut forming portion 18 are completely removed.

After the separation of the mold and the removal of the cores are completed, the molded article can be taken out of the mold to produce one completed buckle, which can complete one cycle of the process for manufacturing the buckle. Repeatedly, the buckle can be manufactured in a mass production system.

1 is a perspective view showing a buckle of the vehicle seat belt

Figure 2 is a perspective view showing a mold apparatus for manufacturing a buckle according to an embodiment of the present invention

3 is a cross-sectional view showing a mold apparatus for manufacturing a buckle according to an embodiment of the present invention.

Figure 4a, 4b, 4c, 4d is a cross-sectional view showing the operating state of the mold apparatus for manufacturing a buckle according to an embodiment of the present invention

<Description of the symbols for the main parts of the drawings>

10: front cover 11: rear cover

12: undercut 13: cavity

14: movable mold 15: fixed mold

16: slide core 17: hinge pin

18: undercut molding part 19: undercut molding protrusion

20: rotating core 21: slide member

22: pin 23: slot

24: slide block 25: drive block

26a, 26b: slide slope 27: guide hole

28: guide pin

Claims (6)

A movable mold 14 and a fixed mold 15 which are vertically joined to each other to form a cavity 13; A slide core 16 which is slide combined into a mold for forming the back portion of the buckle; One side of the fixed mold 15 is rotatably installed by the hinge pin 17, the undercut forming projections 19 that can enter and exit the undercut forming portion 18 of the cavity 13 through the rotation operation. A rotatable core 20 having a); A slide member 21 which rotates while interlocking with the rotatable core 20; Buckle manufacturing mold apparatus characterized in that comprises a. The mold for manufacturing a buckle according to claim 1, wherein the rotatable core 20 and the slide member 21 are interlocked with each other by a coupling structure between the pins 22 and the slots 23 at the lower end and the front end. Device. The method of claim 2, wherein a gap G is formed at a predetermined interval between the pin 22 of the rotatable core 20 and the slot 23 of the slide member 21, so that the slide member 21 is pulled out and rotated. Buckle manufacturing mold apparatus, characterized in that the time difference occurs between the rotational operation of the core (20). The mold apparatus for manufacturing a buckle according to claim 1, wherein the slide core (16) and the slide member (21) are integrally formed by the slide block (24) to operate together. The slide block (24) including the slide core (16) and the slide member (21) is formed by the driving block (25) and the slide inclined surfaces (26a) and (26b) which operate up and down. Buckle manufacturing mold apparatus, characterized in that the slide to be moved back and forth while contacting. The drive block (25) according to claim 1, characterized in that the drive block (25) comprises guide pins (28) which can enter or exit the guide hole (27) in the slide block (24) during contact transmission with the slide block (24). Mold apparatus for manufacturing buckle.
KR1020080123586A 2008-12-05 2008-12-05 Injection molding device for buckle KR101019553B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080123586A KR101019553B1 (en) 2008-12-05 2008-12-05 Injection molding device for buckle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080123586A KR101019553B1 (en) 2008-12-05 2008-12-05 Injection molding device for buckle

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KR20100064932A true KR20100064932A (en) 2010-06-15
KR101019553B1 KR101019553B1 (en) 2011-03-08

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Cited By (10)

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Publication number Priority date Publication date Assignee Title
CN101954720A (en) * 2010-06-19 2011-01-26 凡嘉科技（无锡）有限公司 Longer-stroke slender lifter structure in injection mold
CN101961898A (en) * 2010-09-30 2011-02-02 凡嘉科技（无锡）有限公司 Internal line ejecting structure
CN102529042A (en) * 2012-02-02 2012-07-04 厦门捷信达模具塑胶有限公司 Snap joint demoulding auxiliary system
CN102773970A (en) * 2011-05-10 2012-11-14 苏州汉扬精密电子有限公司 Clutch type slide block mechanism
WO2016131994A1 (en) * 2015-02-18 2016-08-25 Sna Europe Industries Iberia, S.A. Mould, part, system and method for objects with grooves or hollows
CN108908864A (en) * 2018-06-20 2018-11-30 宁波方正汽车模具股份有限公司 Air intake manifold of automotive engine injection mold
WO2019065433A1 (en) * 2017-09-26 2019-04-04 本田技研工業株式会社 Mold device and method for manufacturing resin molded article
KR20200031880A (en) * 2018-09-17 2020-03-25 에이테크솔루션(주) Injection mould having mechanism for inside undercut
CN116100768A (en) * 2023-01-09 2023-05-12 余姚市德沃斯模具科技有限公司 Mould structure of window frame plastic products behind car
KR102566365B1 (en) * 2022-12-13 2023-08-11 주식회사 도우인시스 Tray molding device that creates a height difference when stacking trays

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KR920007033B1 (en) * 1990-05-09 1992-08-24 현대전자산업 주식회사 Undercut treating device for injection molding article
JP3542322B2 (en) * 2000-08-30 2004-07-14 東洋▲ろ▼機製造株式会社 Mold for resin molded product having curved tube part

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Publication number Priority date Publication date Assignee Title
CN101954720A (en) * 2010-06-19 2011-01-26 凡嘉科技（无锡）有限公司 Longer-stroke slender lifter structure in injection mold
CN101954720B (en) * 2010-06-19 2013-01-23 凡嘉科技（无锡）有限公司 Longer-stroke slender lifter structure in injection mold
CN101961898A (en) * 2010-09-30 2011-02-02 凡嘉科技（无锡）有限公司 Internal line ejecting structure
CN102773970A (en) * 2011-05-10 2012-11-14 苏州汉扬精密电子有限公司 Clutch type slide block mechanism
CN102529042A (en) * 2012-02-02 2012-07-04 厦门捷信达模具塑胶有限公司 Snap joint demoulding auxiliary system
WO2016131994A1 (en) * 2015-02-18 2016-08-25 Sna Europe Industries Iberia, S.A. Mould, part, system and method for objects with grooves or hollows
JPWO2019065433A1 (en) * 2017-09-26 2020-04-16 本田技研工業株式会社 Mold device and method for manufacturing resin molded product
WO2019065433A1 (en) * 2017-09-26 2019-04-04 本田技研工業株式会社 Mold device and method for manufacturing resin molded article
CN108908864A (en) * 2018-06-20 2018-11-30 宁波方正汽车模具股份有限公司 Air intake manifold of automotive engine injection mold
CN108908864B (en) * 2018-06-20 2020-06-02 宁波方正汽车模具股份有限公司 Injection mold for intake manifold of automobile engine
KR20200031880A (en) * 2018-09-17 2020-03-25 에이테크솔루션(주) Injection mould having mechanism for inside undercut
KR102566365B1 (en) * 2022-12-13 2023-08-11 주식회사 도우인시스 Tray molding device that creates a height difference when stacking trays
CN116100768A (en) * 2023-01-09 2023-05-12 余姚市德沃斯模具科技有限公司 Mould structure of window frame plastic products behind car

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