WO2012124889A2

WO2012124889A2 - Mold pin-separable fixing apparatus

Info

Publication number: WO2012124889A2
Application number: PCT/KR2012/000319
Authority: WO
Inventors: 한연수
Original assignee: Han Yeun Su
Priority date: 2011-03-14
Filing date: 2012-01-13
Publication date: 2012-09-20
Also published as: WO2012124889A3; KR101131068B1

Abstract

In order to provide a mold pin-separable fixing apparatus having a structure for effective maintenance and repairing of a mold pin, the present invention provides a mold pin-separable fixing apparatus which comprises: a hollow main body case in which a sliding surface is rounded and expanded to the inner circumference of one end of the main body case and a mold device coupling unit is provided at one side of the outer circumference of the main body case; a fixing unit is arranged along the inner circumference of the main body case in order to enable linear movement, wherein an accommodating groove which accommodates a head portion of the mold pin is formed at a front end portion of the fixing unit and a fixture-restraining hole is formed at an edge portion of the accommodating groove; a fixture which is inserted inside the fixture-restraining hole so that one side of the fixture is exposed, restrains and fixes the stepped portion of the head portion of the mold pin by the exposed one side, and releases the restraining state of the stepped portion of the head portion of the mold pin since the fixing unit moves to a sliding surface side when the rear surface of the fixture-restraining hole is in contact with the sliding surface by moving the fixing unit to the front side of the main body case; and a linear movement unit which is connected to a rear end portion of the fixing unit in order to allow selective linear movement of the fixing unit by outside force.

Description

Molding pin detachable mounting device for molding

The present invention relates to a molding die pin detachable mounting apparatus, and more particularly to a molding die pin detachable mounting apparatus providing an effective maintenance and repair structure of the molding die pin.

In general, a die casting or injection mold apparatus includes a core mold corresponding to a shape of a product to be molded by die casting or injection, and a plurality of peripheral devices for driving the core mold including a mold pin on an outer side of the core mold. Is done.

1 is a cross-sectional view showing a conventional mold apparatus.

As shown in FIG. 1, the mold apparatus 1 is provided with a molded part core 5 inside the upper mold 3 and the lower mold 4, respectively, and die casting is formed inside the molded part core 5. To a cavity corresponding to the shape of the article to be molded by injection. Here, any one of the upper mold (3) and the lower mold (4) is provided as a movable side mold, and when the movable side mold is advanced and the mold is closed, the nozzle 7 is advanced to inject the molten hot material into the cavity. do.

At this time, when molding the shape of the hole or the groove to be used as a fastener in the product, the molten material is injected at a high temperature while the mold pin 8 for molding is inserted into the cavity. Through this, it is possible to form a hole or a groove corresponding to the shape of the molding die pin 8 in the product formed through die casting or injection, and the molding die pin 8 is formed on the lower side of the core part 5 and The frame of the mold apparatus is fixed to each other by bolting or the like.

On the other hand, since the molding die pin 8 is exposed to hot molten material that is melted and injected, fatigue often accumulates in the process of hardening or breakage by injection pressure under a high temperature environment. For example, aluminum die casting is exposed to hot molten material of 600 ° C. or higher.

However, in the conventional mold apparatus, in order to replace the broken mold pin 8, the molding unit core and the peripheral mold parts constituting the mold apparatus must be disassembled one by one to release the bolt coupling and the like, thereby maintaining the replacement. The time for repairs had to be delayed. In addition, there was a problem in that the productivity and economics of the product is reduced.

The present invention is to solve the above problems, to provide a molding die pin detachable mounting apparatus for providing an effective maintenance and repair structure of the molding die pin as a problem.

In order to solve the above problems, the present invention is made of a hollow, one end side is formed with a slide surface is roundly expanded on the inner circumference, the main body case provided with a mold device fastening portion on the outer peripheral side; The main body case is disposed so as to be movable forward and backward along the inner circumference, and an accommodating groove is formed in the front end to accommodate the head portion of the molding die pin disposed inside the mold apparatus cavity, and a fastener restraint hole is formed at an edge of the accommodating groove. A mounting unit formed; One side is inserted to expose the inside of the fixture restraint hole, and the head part step of the molding die pin is restrained and fixed by the exposed one side. When the mounting unit is moved to the front side, the rear surface of the fixture restraint hole is the slide. A fastener that is retracted toward the expanded side of the surface to release the restraint state of the head step of the molding die pin; And a front and rear movement means connected to the rear end of the mounting unit and provided to selectively move the mounting unit back and forth by an external force.

Here, a nut thread groove is formed at the rear end of the mounting unit, and the front and rear movement means includes a drive shaft screwed to the screw groove so as to move in the front and rear direction as it is rotated, and an external force is applied to an end connected to the drive shaft. Preferably, a coupler is formed that selectively engages with the device.

In addition, the rear end of the drive shaft is provided with a bevel gear, the coupling sphere is disposed in the worm gear disposed to be coupled to the bevel gear, the rotational direction of the drive shaft and the rotational direction of the coupler is arranged to be spaced apart from each other by a predetermined angle desirable.

In addition, the front end cross section of the fixture restraint hole is formed in a shape that surrounds the fastener so as not to be separated, the rear side cross section is preferably open the retractable fastener.

On the other hand, a long hole is formed on the side of the main body case, the inlet stopper pipe and outlet stopper pipe which is constrained at both ends of the mounting unit to restrict forward and backward movement and respectively function as a flow path of the cooling fluid, The inlet stopper tube is in communication with an inlet tube inserted into the cooling groove formed inside the mold pin for forming, and the outlet stopper tube is formed in a double tube shape surrounding the outer periphery of the rear end of the inlet tube. It is preferable to communicate with an outlet pipe arranged to be sealed and coupled to the inner circumference of the groove.

The present invention provides the following effects through the above solution.

First, the service life of the molding die pin can be significantly increased by providing a structure in which the molding die pin exposed to high temperature molten material is effectively cooled by a cooling fluid.

Second, even when the molding die pin is damaged and replaced, the mold die for molding must be easily dismantled and replaced by only a simple operation of the mounting unit, without having to disassemble the molding unit core and peripheral mold parts. The time for maintenance is shortened, which can significantly improve the productivity and economics of the product.

1 is a cross-sectional view showing a conventional mold apparatus.

2 is a cross-sectional view of a mold apparatus to which a mold pin detachable mounting apparatus for molding according to an embodiment of the present invention is applied.

Figure 3 is an external perspective view of the mold die detachable mounting device for molding according to an embodiment of the present invention.

Figure 4a and Figure 4b is a cross-sectional view of the molding die separate mounting device for molding according to an embodiment of the present invention.

Figure 5 is a cross-sectional view of the mold die detachable mounting apparatus for molding according to an embodiment of the present invention.

Figure 6 is a partially perspective perspective view of the mold pin detachable mounting apparatus for forming according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the mold pin detachable mounting apparatus for molding according to a preferred embodiment of the present invention. Here, the description of the similar or identical configuration to that described in the background art is omitted.

2 is a cross-sectional view of a mold apparatus to which a mold pin detachable mounting apparatus for molding according to an embodiment of the present invention is applied, and FIG. 3 is an external perspective view of the mold pin detachable mounting apparatus for molding according to an embodiment of the present invention.

As shown in Figures 2 and 3, the molding die pin detachable mounting apparatus 20 is fixed to the molding unit core 15 of the mold apparatus 10 to the peripheral frame by bolting or the like. Here, since the molding die pin detachable mounting apparatus 520 is detachably mounted, the molding die pin 521 may be easily replaced when the molding die pin 521 is broken. Here, a mold device fastening part 528 is provided at one outer circumference of the main body case of the mold pin detachable mounting apparatus 520 for fastening and fastening by bolts or the like to the outer side of the molding part core of the mold apparatus.

In detail, Figures 4a and 4b is a cross-sectional view as viewed from the C-C 'direction of Figure 3 operating state of the mold pin detachable mounting apparatus for molding according to an embodiment of the present invention.

As shown in Figures 4a and 4b, the molding die pin detachable mounting device 520 is made of a main body case 525, the mounting unit 530, the fastener 590, and comprises a front and rear movement means (540).

Here, the main body case 525 is made of a hollow type, the slide surface 526 is formed to be expanded toward the end round to the inner peripheral end of one end. That is, one end side inner circumferential surface of the main body case 525 is formed as a slide surface 526 formed to be inclined by a predetermined gradient, the end may be rounded.

In addition, the mounting unit 530 is disposed to move forward and backward along the inner circumference of the main body case 525, and a receiving groove 531 is formed in which a head part 521a of a molding die pin is accommodated in a front end portion. A fixture restraint hole 533 is formed at the edge portion 532 of the receiving groove 531. At this time, the inner circumferential surface of the receiving groove 531 is preferably extended in a straight line to be in close contact with the outer circumferential surface of the molding die pin 521 to maintain an upright state.

In addition, a fastener is interposed between the fastener restraint hole 533, and the front side cross section of the fastener restraint hole 533 is formed in a shape that is partially enclosed in a structure that is not detached from the fastener 590, and is rearward. The cross section is preferably formed such that the fixture 590 is retractably open. To this end, the cross section of the fixture may be formed in a sphere (球) shape.

Thus, in a state where the rear end of the fixing tool 590 is restrained on the inner wall surface of the main body case 525, the head end step 521b of the molding die pin 521 passes through the fixing tool restraining hole 533. It is constrained by the exposed portion of the fixture 590. On the other hand, when the mounting unit 530 is advanced and the fixture restraint hole 533 is moved to a position corresponding to the slide surface 526, the fixture 590 is extended toward the inner wall surface of the slide surface 526. As the retracted state releases the restrained state of the head step 521b of the molding die pin 521, the molding die pin 521 may be easily detached.

In detail, as shown in Figure 4a, the fastener 590 is inserted so that one side is exposed to the inside of the fastener restraint hole 533, by the exposed one side of the head step of the mold pin (521) ( 521b) is constrained to be selectively detachably fixed.

On the other hand, as shown in FIG. 4B, when the mounting unit 530 is moved to the front side and the rear surface of the fixture restraint hole 533 is in contact with the slide surface 526, the fixture 590 is the slide surface. Retracted toward 526, the restrained state of the head step 521b of the molding die pin 521 is released. Through this, it can be easily separated and replaced when the molding die pin 521 is damaged.

FIG. 5 is a cross-sectional view illustrating the structure of the fastener viewed from the cross-sectional view taken along line D-D 'of FIG. 4A.

As shown in Figure 5, the fastener 590 is provided with a plurality of arcs, it is preferably inserted into the fastener restraint hole 533 formed in the mounting unit 530 is interposed. Preferably, they are spaced apart from each other by 120 ° with respect to the center of each fixture. The fastener 590 may be inserted into the fastener restraint hole 533 to couple the mounting unit 530 to the inner side of the main body case 525 to complete a partial assembly. Of course, the fastener 590 may be composed of two or more and spaced apart at various angle intervals instead of 120 ° angle intervals.

On the other hand, as shown in Figures 4a to 4b, the mounting unit 530 is connected with the front and rear movement means 540 to move back and forth by the external force. In detail, the front and rear movement means 540 is connected to the rear end of the mounting unit 530, and is provided to selectively move the mounting unit 530 back and forth by an external force.

Here, a nut thread groove 527 is formed at the rear end of the mounting unit 530. In addition, the front and rear movement means 540 is screwed to the threaded groove 527 so as to be moved in the front and rear direction as it is rotated, and the body case 525 by the screw coupling configuration 544 to the slide bearing 549 or the like. A drive shaft 541 is rotatably supported at an inner circumference of the rear end, and a coupler 543 may be formed at an end connected to the drive shaft 541 to be selectively coupled with an external force applying device. That is, by the screw-type screwing configuration 544 between the first screw thread formed in the inner circumference of the nut thread groove 527 and the second screw thread formed on the outer circumference of the front end of the drive shaft 541, the drive shaft 541 is rotated. Optionally the mounting unit is forward or backward. Here, the screw thread may be formed of a 2-ply thread or a 3-ply thread, and the cross-sectional shape of the screw may be formed in various shapes such as trapezoidal to triangular.

Of course, the screw coupling configuration 544 may be replaced by a ball screw device or the like.

At this time, the external force applying device may be made of an electric drill tool, etc., the coupling portion 543 may be formed with a groove or the like that can be rotated together with a wrench or other work tool is coupled in an inserting manner.

Figure 6 is a partial projection perspective view of the mold pin detachable mounting apparatus for forming according to an embodiment of the present invention.

As shown in FIG. 6, the mold pin detachable mounting apparatus 520 according to the present embodiment includes a bevel gear 545 at the rear end of the driving shaft 541, and a worm gear coupled to the bevel gear 545. A coupler 543 is disposed at the end of 546 so that an external force applying device such as an electric drill device to which an AC to DC speed reduction motor is applied may be coupled to the coupler 543. Through this, the rotation axis direction of the drive shaft 541 and the rotation axis direction of the coupler 543 may be arranged to be spaced apart from each other by a predetermined angle.

That is, due to the complex structure of the mold apparatus, the part in which the mold pin separating type mounting apparatus 520 is formed is narrow without a space for connecting and applying the external force applying device. As such, when an external force applying device such as an electric drill device cannot be disposed in one direction, the coupling structure of the bevel gear 545 and the worm gear 546 described above may be set to the engagement direction between the coupling tool 543 and the external force applying device. You can perform efficient work by changing through.

Of course, if the rotational force transmitted to the coupler 543 can be transmitted by changing the angle, the bevel gear-worm gear coupling structure may be replaced by a universal joint or other configuration.

On the other hand, the cooling structure of the mold pin detachable mounting apparatus for molding according to an embodiment of the present invention will be described.

3, 4A and 4B, a long hole 529 is formed at the side of the main body case 525, and is constrained to both ends of the long hole 529 at the outer circumference of the mounting unit 530 to be in front and rear directions. An inlet stopper pipe 555a and an outlet stopper pipe 555b, which restrict movement and respectively function as a flow path of the cooling fluid, are connected. That is, it is preferable that the front and rear movement distances of the mounting unit 530 are limited by the clearance between the inlet stopper pipe 555a and the outlet stopper pipe 555b and the long hole 529.

In addition, the inlet stopper pipe 555a communicates with an inlet pipe 561 inserted into the cooling groove 521c formed inside the mold pin 521, and the outlet stopper pipe 555b is connected to the inlet. The outer end of the tube 561 is formed in a double tube shape surrounding the outer circumference is in communication with the outlet pipe 562 disposed to be coupled to the inner circumference of the cooling groove (521c).

Here, the cooling fluid flowing through the inlet stopper pipe 555a is preferably air, but cooling water may be supplied for the water cooling structure. The cooling fluid introduced through the inlet stopper pipe 555a is circulated inside the molding die pin 521 via the inlet pipe 561 to cool the outlet pipe 562 and the outlet stopper pipe 555b. Is discharged through. Through this, the heat of the material melted in the die casting or injection process and injected into the cavity is minimized to be transmitted to the rear end of the mounting unit 530 to ensure stable operation, and for the molding die pin 521. Effective cooling can also be performed.

As described above, the present invention is not limited to the above-described embodiments, but may be modified and implemented by those skilled in the art without departing from the scope of the claims of the present invention. Such modifications are within the scope of the present invention.

Claims

It is made of a hollow, one end side is formed with a slide surface is roundly expanded in the inner circumference, the main body case having a mold device fastening portion on one side of the outer circumference;

It is arranged to be movable forward and backward along the inner circumference of the main body case, a nut thread groove is formed in the rear end, the receiving groove is formed in the front end is accommodated the head portion of the mold pin for molding disposed inside the mold apparatus cavity, A mounting unit having the fastener restraint hole formed at an edge of a receiving groove;

One side is inserted to expose the inside of the fixture restraint hole, and the head part step of the molding die pin is restrained and fixed by the exposed one side. When the mounting unit is moved to the front side, the rear surface of the fixture restraint hole is the slide. A fastener that is retracted toward the expanded side of the surface to release the restrained state of the head step of the molding die pin; And

A drive shaft connected to the rear end of the mounting unit and screwed to the threaded groove so as to move in the front-rear direction as it is rotated, and a coupling tool selectively coupled with an external force applying device is formed at an end connected to the drive shaft, By the front and rear movement means provided to selectively move the mounting unit back and forth by,

The front end cross section of the fixture restraint hole is formed in a shape that surrounds the fastener so as not to be separated, the rear side cross section is a mold pin detachable mounting device for forming the mold is formed by the retractable opening.
The method of claim 1,

A bevel gear is provided at the rear end of the drive shaft, and the coupling tool is disposed on a worm gear disposed to be coupled to the bevel gear.

Molding pin separating type mounting device, characterized in that the rotational direction of the drive shaft and the rotational direction of the coupler is arranged to be spaced apart from each other by a predetermined angle.
The method of claim 1,

A long hole is formed on the side of the body case,

Inlet and outlet stopper pipes connected to the outer circumference of the mounting unit are restricted to both ends of the long hole to restrict forward and backward movement and respectively function as a flow path of the cooling fluid.

The inlet stopper tube is in communication with the inlet tube is inserted into the cooling groove formed in the inner side of the mold die pin, the outlet stopper tube is formed in the form of a double tube surrounding the outer periphery of the rear end of the inlet pipe, the outer periphery of the cooling groove Molding pin separating type mounting device, characterized in that in communication with the outlet pipe arranged to be coupled to the inner circumference of the.