KR20200142667A - Mould apparatus of diecasting machine - Google Patents

Abstract

The present invention aims to provide a mold apparatus which is able to take out a socket cast product of a female button for a snap button, which is completely molded in a mold, in a stable manner without deformation such as torsion. According to the present invention, the socket mold apparatus of the female button for the snap button, which comprises: a fixing platen with first guide grooves formed on all four directions of an upper surface to guide when closing; a fixing die fixed to an inner side on an upper surface of the fixing platen to form a cavity corresponding to an outer surface shape of the molded product; an ejector platen placed to close/open while rising/falling by the driving of a first actuator on an upper side of the fixing die, where first guide pins are installed to be inserted into the first guide grooves on all four directions on a lower surface; an ejector die fixed to an inner side on a lower surface of the ejector platen, where a core die is installed to form a cavity corresponding to the inner surface shape of the molded product; and a stripper die mounted on a lower side of the ejector die to rise/fall by the driving of a second actuator when opening, to push down the molded product in the core die, to separate the molded product, and to have a penetrating hole for allowing the core die to penetrate.

Description

Socket mold device of female button for snap button{MOULD APPARATUS OF DIECASTING MACHINE}

The present invention relates to a direct-pressure mold device of a die casting machine, and more particularly, a socket molded product (casting product) of a snap button female button for a snap button molded in the mold can be completely and stably removed without deformation such as defects such as scratches or distortion. It relates to a socket mold device for a female button for a snap button in which there is.

Diecasting is a casting method that mass-produces the same casting as the mold in a short time by injecting molten metal (melted metal) into a precisely processed mold by applying pressure at a high temperature. High productivity, dimensional accuracy, beautiful casting surface, Due to the advantage of being able to obtain thin cast products, it is widely used from many kinds of automobile parts to electric/electronic parts and daily necessities.

In general, a diecasting machine is largely composed of a power device, a melting device, a casting device, a clamping device, and a control device.In particular, the clamping device moves a movable mold relative to a fixed mold to open and close, that is, mold closing, It plays the role of controlling mold and mold opening operations.

For example, in the clamping device used in a conventional die casting machine, as shown in FIG. 1, a fixed mold 1 is fixed to a main body 4a of the die casting machine 4, and a movable plate of the die casting machine 4 ( The movable mold 2 is fixed to 4b).

And the movable plate (4b) is connected to the rod (4d) of the hydraulic cylinder (4c), it reciprocates along the rail (4e) by the operation of the hydraulic cylinder (4c), and the movable mold (2) It is in close contact with or spaced apart from the fixed mold (1).

In addition, in the case of a cold chamber type die-casting machine, a molten metal inlet 1k is formed in the fixed mold 1 as shown in FIG. 2, and the molten metal inlet 1k is supplied with molten metal from the outside. The shot sleeve 9 is connected, and the shot sleeve 9 is provided with a plunger 9a for pressing the molten metal.

In addition, when the fixed mold 1 and the movable mold 2 are in close contact, a space 3 consisting of a cavity 3a, a gate 3b, and a runner 3c is formed therebetween.

Here, the cavity (3a) is a molding space filled with the molten metal to be molded into a casting, the gate (3b) is connected to the cavity (3a), and the runner (3c) is connected between the molten metal inlet (1k) and the gate (3b). This is the part.

Therefore, when the hydraulic cylinder (4c) is operated, the movable mold (2) fixed to the movable plate (4b) moves toward the fixed mold (1) and adheres to each other, and in this state, the molten metal supplied into the shot sleeve (9) is transferred to the plunger. When pressed by (9a), the molten metal flows along the runner 3c through the molten metal inlet 1k, and is ejected into the cavity 3a through the gate 3b and injected into the cavity 3a, and the cooling process is performed. After a certain time passes, the molten metal in the cavity 3a is solidified and formed into a metal product having a shape corresponding to the shape of the cavity 3a, that is, a cast product.

Thereafter, the movable mold 2 is pushed out with a separate ejector pin while the movable mold 2 is moved to the original state to take out the molded cast product.

However, in such a conventional mold clamping device, when the molded product is a molded product that requires a thin-walled frame, that is, a flange, which is thin and light, such as a socket of a female button for a snap button, the cast product is transferred from the movable mold (2). In the process of ejecting the ejector pin, there is a problem that the defect rate is considerably high and the quality is deteriorated due to deformation such as warping or bending.

On the other hand, Korean Patent Publication No. 10-0203397 discloses that the core is separated from the molded product before pushing the molded product with an ejector pin to prevent bending or deformation in the process of pushing it out of the mold after molding a molded product having a hole by the core. Although the structure is disclosed, if the molded product has a flange that is weak to external force in the form of thin and light weight, such as a socket for a snap button arm, when the core is separated from the molded product, the flange portion is caused by contact interference with the core. Unbalanced force, that is, resistance and stress, interfere with stable release, and there are limitations in that the flange portion is scratched and is easily bent or deformed.

The background technology or the prior art described herein is information possessed by the present inventors or acquired in the process of deriving the present invention, and is only intended to help understand the technical significance of the present invention. It should be noted that it does not mean a technique widely known in the field, and in addition, reference numerals in the prior art are mutually independent of reference numerals in the present invention.

KR Registered Patent Publication 10-1568961 (2015.11.06) KR Registered Patent Publication 10-1375643 (2014.03.18) KR Registered Patent Publication 10-1258788 (2013.04.29) KR Registered Patent Publication 10-1067015 (2011.09.22) KR Registered Patent Publication 10-0712751 (2007.04.30) KR Registered Patent Publication 10-0662034 (2006.12.27) JP Special Patent Review 10-258450 (1998.09.29) KR Registered Patent Publication 10-0806021 (2008.02.26) KR Registered Patent Publication 10-1100298 (2011.12.30) KR Registered Patent Publication 10-1188450) 2012.10.05)

Accordingly, the inventors of the present invention comprehensively consider the above-described matters and, from the idea of solving the technical limitations and problems of the existing mold apparatus, a socket molded product of a female button for a snap button that is formed in a form having a very thin thickness of the flange (rim). The present invention was continuously researched with great efforts to develop a new mold device that can achieve the effect of completely and stably taking out (casting products) from the mold without deformation such as defects such as scratches and distortion. Was created.

Accordingly, it is a technical problem and object to be solved by the present invention to provide a socket mold apparatus for a female button for a snap button that allows a molded product to be completely and stably taken out from a mold.

Herein, the technical problems and objects to be solved by the present invention are not limited to the technical problems and objects mentioned above, and other technical problems and objects not mentioned will be clearly understood by those skilled in the art from the following description.

A specific means according to an aspect of the present invention for achieving the above-described object and solving the technical problem is a polycarbonate material that is elastically deformed by elasticity when receiving an external force due to contact, pressure, etc. of the means weight. The first member of the disk type is embedded, and the flange portion of the lower rim is bent or press-molded in a state in which a part of the second member attached to the object to be attached is inserted, and the first member is fixed so that the first member does not fall out. In order to form a socket of a female button for a snap button having an insertion hole so that the means is inserted into the socket, a first guide groove is formed on all sides of the upper surface to guide when the mold is closed, and the fixing platen is fixed inside the upper surface of the fixed platen. , A fixed die forming a cavity corresponding to the shape of the outer surface of the socket, provided to mold-close and open while lifting and lowering by driving a first actuator from an upper side of the fixed die, and in the first guide groove on all sides of the lower surface An ejector plate equipped with a fitted first guide pin, an ejector die fixed on the inside of the lower surface of the ejector platen and having a core die forming a cavity corresponding to the shape of the inner surface of the socket, and mounted on the lower side of the ejector die A female button for snap button, comprising a stripper die having a through hole penetrating the core die while lifting and lowering by driving a second actuator when the mold is opened We present the socket mold device of

Accordingly, the present invention can be taken out in an intact and stable form without deformation such as surface defects such as scratches or distortions on the thin flange portion when releasing the molded product from the mold.

In addition, as a preferred embodiment of the present invention, it is configured to further include a knockout pin that is attached to the core die and releases the molded article attached to the stripper die upon mold opening, so that the molded article can be taken out more quickly and efficiently. I can.

In addition, in a preferred embodiment of the present invention, a second guide groove serving as a guide during mold closing is formed on all sides of the upper surface of the fixed die, and the second guide groove is inserted into the second guide groove on all sides of the lower surface of the ejector die. 2 Guide pins are installed, and guide holes through which the second guide pins pass are formed on all sides of the stripper die, so that the stripper die is guided by the second guide pin and the guide hole and is used to drive the second actuator. It can be operated more stably by lifting.

An aspect of the present invention having a means and a configuration for achieving the above object and solving the technical problem is to primarily separate the molded product from the fixed die while the ejector die rises during the opening operation of the mold, and the ejector die At the same time, the stripper die descends and pushes down the molded product in the rising state of the core die, secondly separating it from the core die, and then thirdly, the knockout pin strikes and drops the molded product. Because it is released (separated) naturally, it is intact and does not cause surface defects such as scratches or deformations, such as distortion, to the thin flange portion due to external forces such as resistance and stress applied in the process of separating the molded product from the mold. It can be taken out in a stable form.

Therefore, it is possible to greatly improve productivity by minimizing the defect rate of a molded product (casting product) having a flange that is vulnerable to external force, such as a socket of a female button for a snap button, and it is possible to obtain a higher quality cast product.

Here, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a side view schematically showing a mold clamping apparatus according to the prior art.
2 is a partial cross-sectional view showing a local portion of a mold clamping apparatus according to the prior art.
3 is a perspective view showing an arm snap for a snap button.
4 is a cross-sectional view showing an arm snap for a snap button.
5 is a partial cross-sectional view schematically showing a socket mold apparatus for a snap button arm snap according to an embodiment of the present invention in a mold closed state.
6 is a partial cross-sectional view schematically showing a socket mold apparatus for a snap button arm snap according to an embodiment of the present invention in a mold opening state.
7 is a partial cross-sectional view of a state in which the socket mold device for the snap button arm snap according to an embodiment of the present invention pushes a molded product out of the core die.
8 is a partial cross-sectional view of a state in which the socket mold device for a snap button arm snap according to an embodiment of the present invention completely releases a molded product.

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

Prior to this, the terms to be described later are defined in consideration of functions in the present invention, and this should be interpreted as a concept conforming to the technical idea of the present invention and a meaning commonly or commonly recognized in the art.

In addition, when it is determined that a detailed description of known functions or configurations related to the present invention may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

Herein, the accompanying drawings are partially exaggerated or simplified for explanation of the configuration and operation of the technology, and for convenience and clarity of understanding, and it is understood that each component does not exactly match the actual size and shape.

In addition, in the present specification, the term and/or means a combination of a plurality of related items or any item among a plurality of related items, and when a certain part includes a certain element, it is a particularly opposite description. Unless there is no other component is not excluded, it means that other components can be further included.

That is, it means that the features, numbers, steps, actions, components, parts, or combinations of these described in the present specification exist, and one or more other features or numbers, step-action components, parts, or a combination thereof It is to be understood that they do not exclude the possibility of their existence or addition.

In addition, each step may occur differently from the stated order unless a specific order is clearly stated in the context. That is, each of the steps may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

In addition, terms such as top, bottom, top, bottom, or top, bottom, top, bottom, front and rear, left and right are used for convenience to distinguish the relative positions of each component. For example, the upper part on the drawing may be named or referred to as the upper part and the lower part as the lower part, the longitudinal direction as the front-rear direction, and the width direction as the left-right direction.

Also, terms such as first and second may be used to describe various components. That is, terms such as first and second may be used only for the purpose of distinguishing one component from another component. For example, a first component may be referred to as a second component without departing from the protection scope of the present invention, and a second component may also be referred to as a first component.

[Example]

As shown in Figures 3 to 8, the socket mold device of the arm snap for a snap button according to an embodiment of the present invention is made of a polycarbonate material that is elastically deformed by elasticity when receiving an external force due to contact or pressure of a means weight. A disk-shaped first member (1) is embedded, and a portion of the flange (4) of the lower rim is bent or pressed and rolled inward with a part of the second member (2) attached to an object to be attached to clothing such as clothing. The first member (1) is fixed so that it does not fall out, and is to form a socket (3) of a female button for a snap button having an insertion hole (5) so that a means is inserted in the middle, and largely a fixed platen (10), a fixed die 12, an ejector platen 20, an ejector die 23, a core die 24, a stripper die 30, and a knockout pin 40.

The fixed platen 10 is installed on a fixed side mounting plate (not shown) of the die casting machine, and is fixed by stopping at a certain position with the fixed die 12 mounted inside the upper surface of the center.

In addition, first guide grooves 11 are formed on all sides of the upper surface of the fixed platen 10 to serve as a guide during mold opening and mold closing.

In addition, the upper surface of the fixed die 12 is configured to form a plurality of cavities (C) corresponding to the shape of the outer surface of the socket 3, and the second guide groove 13 serves as a guide during mold closing on all sides. Is formed.

In addition, in the fixed die 12, a runner, a feed sprue, a gate, and the like are formed to flow molten metal (metal) from the sprue to the cavity C.

The ejector platen 20 is installed on the mounting plate on the movable side of the die casting machine, and the ejector die 23 is mounted on the inside of the lower surface of the center, while a fixed die is mounted by a first actuator 21 such as a ram. 12) is provided to perform a role of opening and closing the mold while moving in the opening and closing direction of the mold.

That is, the ejector platen 20 is provided to be mold-closed and mold-opened while lifting and lowering by driving of the first actuator 21 from the upper side of the fixed die 12, and is fitted into the first guide groove 11 on all sides of the lower surface. A first guide pin 22 is provided.

Further, on the lower surface of the ejector die 23, a plurality of core dies 24 forming a cavity C and an insertion hole 5 corresponding to the shape of the inner surface of the socket 3 are installed, and the ejector die 23 The second guide pins 25 fitted into the second guide grooves 13 are provided on all sides of the lower surface.

That is, the core die 24 is paired with the fixed die 12 to form a cavity in which the molten metal is injected (a space having a shape corresponding to the cast product to be formed), and the cavity C is divided It is formed in a shape corresponding to the molded article to be molded on the fixed die 12 and the core die 24 based on the surface.

Further, in the center of the ejector platen 20 and the ejector die 23, a rod through-hole 26 communicating vertically is formed.

The stripper die 30 is mounted on the lower side of the ejector die 23 to push down and separate the molded product M bitten by the core die 24 while moving up and down at a certain distance by driving the second actuator 31 when the mold is opened. have.

Further, a plurality of core through holes 32 penetrating the core die 24 are formed inside the stripper die 30.

In addition, guide holes 33 passing through the second guide pin 25 are formed on all sides of the stripper die 30 for stable guidance and lifting operation within a certain displacement in the opening and closing direction of the mold.

That is, the stripper die 30 is fixed to the rod end of the first actuator 21 so that it can move in the opening and closing direction of the mold together with the ejector die 23 by the operation of the first actuator 21 such as a ram. It is installed on the ejector platen 10, and a core through hole 32 corresponding to the core die 24 is drilled in the center.

Therefore, when the core die 24 is completely inserted into the core through-hole 32 of the stripper die 30, the ejector die 23 forms a complete body, and the core die 24 is in the core through-hole 32. When it is removed from the molded product M, only the portion R formed by the molten metal entering and being hardened by the runner, feed sprue, etc. is in contact with the stripper die 30.

Here, the injection port, the plunger, and the like for supplying the molten metal to the cavity C between the fixed die 12 and the core die 24 have the same configuration as in the related art, and thus, illustration and detailed description thereof will be omitted.

In addition, with the first and second actuators 21 and 31, the controller transmits a control signal to a driving source such as a compressor, and the cylinder (push loader, piston or plunger) is operated by hydraulic or pneumatic pressure. It can be applied by adopting a hydraulic or pneumatic solenoid valve that converts the direction of motion with an actuator (a device that converts energy and control signals into mechanical work) such as a hydraulic motor or a hydraulic cylinder or a hydraulic (pneumatic) pump. May be.

In addition, for example, a pneumatic rodless cylinder may be employed. That is, the slide may be configured to move along the guide rail using the magnetic force and pneumatic pressure of the permanent magnet.

The knockout pin 40 is for completely disengaging the molded product M attached to the stripper die 30 as it rises up on the core die 24 when the mold is opened, and moves forward and backward according to the operation of the ram to move the fixed die ( It is arranged to be able to enter and exit the space between 12) and the core die 24.

The main operation and operating principle of the mold apparatus according to the embodiment of the present invention configured as described above will be described as follows.

First, as shown in FIG. 3, the ejector die 23 and the core die 24 are in close contact with the fixed die 12 to form a cavity C, and then a plunger (not shown) is operated to form a shot sleeve (not shown). Inject the molten metal into the cavity (C) and fill it. At this time, the inside of the cavity (C) can be maintained in a vacuum state by removing gas in the cavity (C) using a vacuum pump or the like.

Thereafter, the molten metal in the cavity (C) is formed into a molded product (M) having a shape corresponding to the cavity (C) while being hardened over a certain period of time such as cooling treatment.

In this state, as shown in FIG. 4, when the ejector platen 20 is separated from the fixed platen 10 according to the rising operation of the first actuator 21, the molded product M is attached to the core die 24. In this state, while being separated from the fixed die 12 together with the ejector die 23, it is raised to a certain height and positioned.

Thereafter, as shown in FIG. 5, the stripper die 30 moves down a certain distance by the lowering operation of the second actuator 31, and the molded product M attached to the core die 24 is transferred to the core die. It is separated from (24) first, and in this case, the molded product (M) is kept in contact with the stripper die (30) only in the portion formed by the molten metal entering and being hardened by the runner and the hot water.

In this state, as shown in Fig. 6, the knockout pin 40 moves forward according to the operation of a separate actuator such as a ram, and the molded article M located in the space between the fixed die 12 and the core die 24 (Separating the molded product from the mold) by pushing the part (R) formed by entering the molten metal by a runner or a hot water heater in the form of a blow and dropping it with a separate shooter or completely detaching from the stripper die (30). In the process, it can be taken out by barrel polishing or trimming press process without deformation such as bonding or warping such as scratches.

Thereafter, the knockout pin 40 and the stripper die 30 return to their original positions, and the ejector die 23 and the fixed die 12 are brought into close contact, thereby preparing sequential molding of other molded products.

As described above, the mold apparatus according to the embodiment of the present invention opens the ejector die 23 to first separate the molded product M from the fixed die 12, and at the same time, the core die by the lowering operation of the stripper die 30. 7 and 8 because it is a method in which the molded product M formed by attaching to (24) is naturally separated secondarily as if pushing down, and then the knockout pin 40 is sequentially completely pushed out and separated with a time difference. As shown, the molded article M having a thin-walled flange 4 having a thin thickness and a light weight can be completely and stably taken out without any deformation such as surface coupling or distortion.

In other words, when the molded product (M) is separated from the core die 24, the stripper die 30 acts in reverse to transfer the molten metal, such as the runner, the hot water, and the gate of the molded product (M) into the cavity (C). Flange (4) vulnerable to external force by minimizing the unbalanced resistance and stress that the molded product (M) receives due to contact interference with the core die (24), unlike in the prior art. It is possible to reliably prevent defects in which the parts are damaged or deformed.

On the other hand, the present invention is not limited by the above-described embodiments and the accompanying drawings, and can be variously modified and applied in various ways not illustrated without departing from the technical spirit of the present invention. It is obvious to those of ordinary skill in the art that substitutions and other equivalent examples may be applied widely.

Therefore, the content related to the modification and application of the technical features of the present invention should be interpreted as being included within the spirit and scope of the present invention.

10: fixed platen 11: first guide groove
12: fixed die 13: second guide groove
20: ejector platen 21: first actuator
22: first guide pin 23: ejector die
24: core die 25: second guide pin
26: rod through hole 30: stripper die
31: second actuator 32: core through hole
33: guide hole 40: knockout pin

Claims (3)

A disk-shaped first member made of polycarbonate material that is elastically deformed by elasticity when receiving an external force due to contact or pressure of the means weight is embedded, and a part of the second member attached to the object to be attached is inserted, A mold apparatus for forming a socket of a female snap button having an insertion hole in the center of which the first member is fixed so that the first member is not removed by bending or pressing a flange portion by bending or pressing the flange portion,
A fixed platen having a first guide groove serving as a guide during mold closing on all sides of the upper surface;
A fixed die fixed inside the upper surface of the fixed platen and forming a cavity corresponding to the shape of the outer surface of the socket;
An ejector platen provided to mold closing and mold opening while lifting and lowering by driving a first actuator from the upper side of the fixed die, and having a first guide pin fitted into the first guide groove on all sides of a lower surface thereof;
An ejector die fixed inside a lower surface of the ejector platen and having a core die forming a cavity corresponding to the shape of the inner surface of the socket; And
A stripper die mounted on a lower side of the ejector die and having a core through-hole penetrating the core die while being lifted and lowered by driving a second actuator to separate the molded article bitten by the core die;
Socket mold device of the female button for a snap button comprising a.
The method of claim 1,
A knock-out pin that is attached to the core die and releases the molded article attached to the stripper die upon opening;
A socket mold device of a female button for a snap button further comprising a.
The method of claim 1,
A second guide groove serving as a guide during mold closing is formed on all sides of the upper surface of the fixed die,
A second guide pin fitted into the second guide groove is installed on all sides of the lower surface of the ejector die,
Guide holes through which the second guide pin is passed are formed in all directions of the stripper die,
The stripper die is guided by the second guide pin and the guide hole, and the socket mold apparatus of a female button for a snap button stably lifted and lowered by driving of the second actuator.

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