KR20100128408A - Cooling delay apparatus for support member in hot press - Google Patents

Abstract

PURPOSE: A cooling delay device of a target molding material for hot press, which blocks the heat transmission to a lift pin is from the target molding material, is provided to prevent the partial cracking and defect on the target molding material and to improve the processing efficiency of the target molding material. CONSTITUTION: A cooling delay device of a target molding material for hot press comprises a lift pin(10), an elastic member(20), a jig(30), an insulating member(40) and a fastening member(50). The joint groove is formed on the upper center of the lift pin. The lift pin is mounted on one side of the lower mold to move up and down. The elastic member offers elastic force to the lift pin. The upper side of the jig is installed higher than the upper side of the lower mold.

Description

COOLING DELAY APPARATUS FOR SUPPORT MEMBER IN HOT PRESS}

The present invention relates to a cooling delay device for a molding object for hot press, and more particularly, through a heat insulating material between the jig and the lift pin, and to integrally combine the jig, the lift pin and the heat insulating material as a fastening means to lift the pin from the molding object. The present invention relates to a cooling delay device for a hot press molded object, which can prevent local deformation, cracks and defects from occurring by blocking heat transfer.

In recent years, as environmentally-friendly elements are becoming more important, each automobile manufacturer is increasing the use of high-strength materials in order to meet social demands for fuel efficiency and light weight in applying parts to automobiles. However, high strength materials have problems such as spring back and dimensional freezing in molding. Therefore, due to the difficulty of molding, the use of high strength materials is inevitably limited.

Recently, automotive parts such as bumper impact beams and door reinforcements have been manufactured as high-strength materials. Hot press molding technology is applied as a method to solve the formability problem of high strength materials. That is, to solve the problem of formability of high strength materials by hot press molding technology, in which a high strength material is molded at a high temperature and the material is cooled at the same time as the mold.

In order to apply the hot press molding technology, it is necessary to heat the material at a high temperature in a heating furnace, and then transfer the heated material to the mold to secure a high-strength product through molding and cooling in the mold. However, the material transferred to the upper part of the lower mold in the high temperature furnace generates heat loss through the interlock release of various safety devices and the contact with the cold lower mold during the lowering time of the upper mold. It is a situation where heating of high temperature is made | formed further.

In order to solve this problem, Patent No. 10-0582866 has provided a cooling delay device of a high temperature material.

1 is a block diagram of a cooling delay device of a high temperature material of Patent No. 10-0582866.

As shown in FIG. 1, a conventional cooling delay device 200 of a high temperature material is provided in an upper mold 110, a lower mold 120, and a lower mold 120, respectively, provided in a press main body. ) And the high temperature material transferred between the lower mold 120 and the material seating means 130 to be spaced apart from the upper surface of the lower mold 120.

Such a conventional high temperature cooling delay device 200 is configured to protrude higher than the upper surface of the lower mold 120, the upper surface of the material seating means 130, the high temperature on the upper surface of the material seating means 130 By placing the material (O) to separate the high temperature material from the lower mold 120 to prevent heat exchange between the high temperature material (O) and the lower mold 120 in advance to delay the cooling of the high temperature material (O). .

However, in the conventional high temperature material cooling delay apparatus 200, the material seating means 130 coupled to the lower mold 120 is in contact with the high temperature material O while the material seating means 130 of the high temperature material O is formed. As the contacted part is cooled faster than other parts, there is a problem in which the seating means 130 is locally deformed or cracks and defects are generated when the high temperature material is cooled after molding.

In addition, the conventional cooling delay device 200 of the high temperature material (O) is the material seating means 130 is projected to the upper by the elastic member 140 to support the bottom surface formed with a thick thickness of the high temperature material (O) The material seating means 130 is moved downward by the weight of the high temperature material (O) at the rising position supporting the bottom of the high temperature material (O), the material mounting to support the bottom formed with a thin thickness of the high temperature material (O) Since the means 130 is maintained in the elevated position and is molded in a state where the high temperature material O is inclined, the processing efficiency of the high temperature material O is remarkably lowered.

As a result, the quality of the high temperature material (O) is remarkably lowered, and the defect rate of the high temperature material (O) is increased, resulting in a significant decrease in the reliability of the production plant.

The present invention has been made to solve the above problems, the object of the present invention is to interpose the insulation between the jig and the lift pin, the jig and the lift pin and the insulating material integrally coupled to the fastening means by the lift pin from the molding object The present invention provides a cooling delay apparatus for a hot press molding object that can prevent local deformation, cracks and defects from occurring by blocking heat transfer to the mold.

In addition, the present invention provides a cooling delay device for a hot press molding object that can further improve the heat transfer blocking efficiency from the molding object to the lift pin by further interposing an auxiliary insulating material between the fastening means and the jig.

The present invention also provides a cooling delay apparatus for a hot press molding object that can further improve heat transfer blocking efficiency from a molding object to a lift pin by forming a fastening portion made of a synthetic resin material having a screw thread formed therebetween.

In addition, the first ferrite core is coupled to one side of the lower end of the lift pin, and when the lift pin is raised, a second ferrite core is installed on one side of the lower mold adjacent to the first ferrite core, so that the lift pin supports the bottom surface of the molding object. By allowing the first ferrite core and the second ferrite core to be in close contact with each other by magnetism, the lift pin is prevented from moving downward by the weight of the molding object, and the processing efficiency of the molding object is prevented by preventing the tilting of the molding object in advance. The present invention provides a cooling delay device for a molding object for hot pressing.

According to an aspect of the present invention for achieving the above object, the lower mold of the hot press is configured to include a lower mold and the upper mold to press the hot forming object located between the lower mold and the upper mold In the cooling delay device of the hot press molding object is installed on one side to separate the high temperature molding object from the lower mold to the upper side, the fastening groove is formed in the center of the upper surface, the lower mold is installed so as to be movable A lift pin, a through hole formed in the center thereof, an elastic member installed under the lift pin to provide an elastic force upwardly to the lift pin, and a through hole formed in the center thereof, and positioned above the lift pin, If the lift pin is raised by the elastic member, the upper surface is installed higher than the upper surface of the lower mold The fastener is interposed between the jig in which the molding object is seated on the upper surface of the fish, the insulation pin interposed between the lift pin and the jig, and blocks heat from being transferred from the molding object to the lift pin, and the through hole and the through hole. It is coupled to the groove provides a cooling delay device for forming a hot press forming object comprising a fastening means for integrally coupling the lift pin, the elastic member and the jig.

And, it may further include an auxiliary insulating material interposed between the fastening means and the jig.

In addition, it is preferable to further include a fastening means for applying a synthetic resin adhesive on the inner peripheral surface of the fastening groove, hardening the adhesive and then processing a screw thread on the inner surface, the fastening means is screwed.

In addition, the first ferrite core coupled to one side of the lower end of the lift pin, and has a magnetic opposite to the first ferrite core, and the first ferrite core, when the lift pin of the lower mold is raised by the elastic member The first ferrite core may further include a second ferrite core installed at an adjacent position.

According to the present invention as described above, by interposing the insulation between the jig and the lift pin, by combining the jig, the lift pin and the heat insulating material integrally as a fastening means to block the heat transfer from the molding object to the lift pin by the local deformation of the molding object There is an effect that can prevent the occurrence, cracks and defects in advance.

Further, by further interposing the auxiliary insulating material between the fastening means and the jig, there is an effect of further improving the heat transfer blocking efficiency from the molding object to the lift pin.

In addition, by forming a fastening portion made of a synthetic resin material is formed between the fastening groove and the fastening means has an effect that can further improve the heat transfer blocking efficiency from the molding object to the lift pin.

In addition, the first ferrite core is coupled to one side of the lower end of the lift pin, and when the lift pin is raised, a second ferrite core is installed on one side of the lower mold adjacent to the first ferrite core, so that the lift pin supports the bottom surface of the molding object. By allowing the first ferrite core and the second ferrite core to be in close contact with each other by magnetism, the lift pin is prevented from moving downward due to the weight of the molding object, and the processing efficiency of the molding object is prevented by preventing the tilting of the molding object in advance. There is an effect that can be improved.

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

2 is a cross-sectional view of a hot press in which a cooling delay device of a molding object for hot press according to an embodiment of the present invention is installed.

As shown in FIG. 3, the hot press provided with the cooling delay device 1 of the molding object for hot press according to the exemplary embodiment of the present invention is large in the upper mold 110, the lower mold 120, and the punch 130. And a cooling delay device (1).

The upper mold 110 is installed in the lower portion of the punch support plate 112 and the punch support plate 112 to support the upper end of the punch 130 to be described later from the lower of the punch holder 111 again. And a punch fixing plate 113 for fixing the punch 130, and a stripper installed at a predetermined interval downward from the bottom of the punch fixing plate 113 and coupled with the punch fixing plate 113 by the stripper bolt 115 ( 114).

Here, the punch holder 111, the punch support plate 112 and the punch support plate 112 is integrally coupled by the dowel pin 116.

The lower mold 120 is configured to include a die holder 121 and a die installed on the die holder 121.

Punch 130 is firmly coupled to the punch fixing plate 113 of the upper mold 110 serves to shape the molding object.

The cooling delay device 1 is installed in the installation groove 123 formed in the lower mold 120, and the upper end portion is formed to protrude upward from the upper surface of the lower mold 120 so that the molding object is seated on the upper end so that the molding object is lowered. It serves to be spaced apart from the mold 120, the configuration of the cooling delay device 1 of the hot press molding object according to an embodiment of the present invention will be described in detail with reference to FIGS.

Prior to the description of the cooling delay device 1 of the molding object for hot pressing according to an embodiment of the present invention, the configuration and coupling structure of the upper mold 110 and the lower mold 120 and the punch 130 are described. It will be apparent to those skilled in the art that it is well known to be able to purchase and use a commercially available one and specific description thereof will be omitted.

3 is an exploded perspective view of a cooling delay apparatus of a hot press molding object according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view of the cooling delay apparatus of a hot pressing molding object according to an embodiment of the present invention.

3 and 4, the cooling delay device 1 of the hot press molding object according to the embodiment of the present invention includes a lift pin 10, an elastic member 20, a jig 30, It comprises a heat insulating material 40, the fastening means 50 and the auxiliary heat insulating material (60).

The lift pin 10 includes a cylindrical body 11 having a fastening groove 11a formed at the center of the upper surface thereof, and a catching portion 12 formed at a lower end of the body 11 having a diameter larger than that of the body 11. It is configured to include, the jig 30 to be described later serves to protrude higher than the upper surface of the lower mold (120).

Here, the body 11 is inserted into the installation groove 123 of the lower mold 120, the jig 30 and the heat insulating material 40 which will be described later on the top of the elastic member 20 and the upper mold 110 is installed. It is moved by the falling pressure of.

The locking portion 12 serves to prevent the body 11 from being detached to the outside while being supported by the locking jaw 124 formed at the entrance of the lower mold 120 installation groove 123 when the body 11 is moved upward. Do it.

The elastic member 20 is installed in the lower portion of the lift pin 10 of the installation groove 123 of the lower mold 120, one end is supported on the bottom surface of the lift pin 10, the other end of the installation groove 123 It is supported on the bottom.

The elastic member 20 has an elastic force upward, and serves to allow the lift pin 10 to move upward by providing an elastic force upward to the lift pin 10, a conventional coil spring may be used.

The jig 30 has a support groove 31 in which the head portion 51 of the fastening means 50 to be described later is supported on the upper surface, and a through hole 32 penetrated downward from the bottom of the support groove 31 is formed. It is formed in a cylindrical shape, when the lift pin 10 is moved upward by the elastic member 20, the upper end is positioned higher than the upper surface of the lower mold 120, the molding object is seated on the upper surface.

The heat insulating material 40 is formed in a cylindrical shape in which a through hole 41 is formed in the center, and is interposed between the upper portion of the lift pin 10 and the bottom surface of the jig 30 to the lift pin 10 from a high temperature molding object. By blocking the heat transfer of the serves to delay the cooling of the molding object.

The heat insulating material 40 is preferably a material having a low thermal conductivity, and is formed to be porous in order to reduce the thermal conductivity, it is preferable that a material having a low thermal conductivity using the thermal insulation of air in the pores.

The heat insulating material 40 can be largely divided into an organic heat insulating material 40 and an inorganic heat insulating material 40. Organic materials include cork, cotton, felt, cork carbide, foam rubber, and the like. Stone, glass wool, quartz wool, diatomaceous earth, magnesium carbonate powder, magnesia powder, calcium silicate, pearlite and the like can be used.

In addition, when the temperature of the molding object is 1,000 ° C. or more, it is preferable to use a firebrick made by combining the refractory material with porous insulation.

The fastening means 50 may be a conventional bolt member formed of the head 51 and the screw 52, the head 51 is the bottom surface of the support groove 31 of the jig 30 as described above In the state supported by the screw 52 is passed through the through hole 32 of the jig 30 and the through hole 41 of the elastic member 20 is coupled to the fastening groove 11a of the lift pin 10 The jig 30, the elastic member 20 and the lift pin 10 serves to integrally combine.

The auxiliary insulating material 60 is a synthetic resin material, and is formed in a donut shape similar to a conventional washer, and is formed between the bottom surface of the head portion 51 of the fastening means 50 and the bottom surface of the jig 30 mounting groove 123. Installed and serves to prevent heat transfer from the object to the lift pin 10 through the fastening means 50 in advance.

As described above, the cooling delay device 1 of the hot press molding object according to the exemplary embodiment of the present invention lifts from the molding object through the insulation 40 between the jig 30 and the lift pin 10 as described above. By blocking the heat transfer to the fin 10, there is an effect that can prevent the local deformation and cracks and defects of the molded object in advance.

In addition, by interposing the auxiliary insulating material 60 between the fastening means 50 and the jig 30, the heat transfer blocking efficiency from the molding object to the lift pin 10 can be further improved.

5 is an exploded perspective view of a cooling delay apparatus of a hot press molding object according to another embodiment of the present invention, and FIG. 6 is a cross-sectional view of the cooling delay apparatus of a hot pressing molding object according to another embodiment of the present invention.

5 and 6 are the same as the embodiment of FIGS. 3 and 4, but the heat transfer blocking efficiency from the molding object to the lift pin 10 can be further improved, and the lift pin 10 is formed of the molding object. It is configured to prevent the downward movement by the weight.

5 and 6, in the present embodiment, the fastening part 70 is installed between the fastening means 50 and the lift pin 10 and the lower end of the lift pin 10 is different from the previous embodiment. The first ferrite is installed, and when the lift pin 10 of the lower mold 120 is raised, the first ferrite core 80 further includes a second ferrite core 90 at a position adjacent thereto.

The fastening portion 70 is a synthetic resin material, the outer circumferential surface of which is bonded to the inner circumferential surface of the fastening groove 11a, and a thread is formed on the inner circumferential surface.

Such a fastening portion 70 is provided by applying an adhesive in a molten state to the inner circumferential surface of the fastening groove 11a, and after curing the adhesive, processes the inner circumferential surface of the cured adhesive to form a screw thread 52.

Such a fastening part 70 is to block the heat transfer from the molding object to the lift pin 10 through the fastening means 50 in advance, and synthetic resin material of epoxy or elastomer may be used. have.

The first ferrite core 80 and the second ferrite core 90 are formed to have different magnetism so that when the lift pin 10 is raised, the first ferrite core 80 and the second ferrite core 90 are fixed to the second ferrite core 90 fixed to the lower mold 120. The ferrite core 80 is in close contact, and serves to prevent the lift pin 10 from moving downward by the weight of the installation object by the attraction force.

Since the rest of the structure is the same as the above-described basic embodiment, the rest of the description will be omitted.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims are intended to cover such modifications or changes as fall within the scope of the invention.

1 is a configuration of a cooling delay device of a high temperature material of Patent No. 10-0582866,

Figure 2 is a cross-sectional view of the hot press is equipped with a cooling delay device of the forming object for hot pressing according to an embodiment of the present invention,

3 is an exploded perspective view of a cooling delay apparatus of a molding object for hot pressing according to an embodiment of the present invention;

4 is a cross-sectional view of a cooling delay apparatus of a molding object for hot pressing according to an embodiment of the present invention;

5 is an exploded perspective view of a cooling delay apparatus of a molding object for hot pressing according to another embodiment of the present invention;

6 is a cross-sectional view of a cooling delay apparatus of a molding object for hot pressing according to another embodiment of the present invention.

<Description of main drawing code>

100: hot press 110: upper mold

120: lower mold 130: punch

1: Cooling delay device for hot press molding object

10: lift pin 20: elastic member

30: jig 40: insulation

50: fastening means 60: auxiliary insulation

70: fastening portion 80: first ferrite core

90 second ferrite core

Claims (4)

The lower mold and the upper mold is configured to be installed on one side of the lower mold of the hot press to press the hot forming object located between the lower mold and the upper mold is installed on the lower mold from the lower mold to the upper In the cooling delay apparatus of the molding object for hot press spaced apart, A fastening groove is formed at the center of an upper surface, and a lift pin which is installed on the lower mold side so as to be movable; An elastic member installed below the lift pin to provide an elastic force upwardly to the lift pin; A jig in which a through hole is formed in the center and positioned above the lift pin, and wherein the lift pin is raised by the elastic member, an upper surface is installed higher than an upper surface of the lower mold, and the molding object is seated on an upper surface thereof; A through hole is formed in the center, interposed between the lift pin and the jig, the heat insulating material to block heat transfer from the molding object to the lift pin; And And a fastening means coupled to the fastening groove through the through hole and the through hole to integrally couple the lift pin, the elastic member, and the jig. The method of claim 1, Cooling delay apparatus of the molding object for hot press further comprises an auxiliary insulation interposed between the fastening means and the jig. The method of claim 1, Applying an adhesive of a synthetic resin material to the inner peripheral surface of the fastening groove, is formed by processing a screw thread on the inner surface after curing the adhesive, the molding object for hot press further comprises a fastening portion for screwing the fastening means Cooling retarder. The method of claim 1, A first ferrite core coupled to one side of a lower end of the lift pin and having magnetic properties; It further comprises a second ferrite core having a magnetic opposite to the first ferrite core, the first ferrite core is installed in an adjacent position when the lift pin of the lower mold is raised by the elastic member Cooling delay apparatus for the molding object for hot press.

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