KR20100002922A

KR20100002922A - Mold assembly

Info

Publication number: KR20100002922A
Application number: KR1020080062986A
Authority: KR
Inventors: 손재영
Original assignee: 한국단자공업 주식회사
Priority date: 2008-06-30
Filing date: 2008-06-30
Publication date: 2010-01-07

Abstract

The present invention relates to a mold assembly. In the present invention, the first mold plate 32 is provided on one surface of the fixed side plate 30 fixed to the fixed side of the molding machine, the first main core 34 having a shape corresponding to a part of the product (m) shape is provided. do. On the support plate 53 provided on the movable side plate 50 installed on the movable side of the molding machine, a second main core which forms a cavity corresponding to the shape of the product m together with the first main core 34 ( The second mold plate 56, on which 58 is installed, is provided. On the support plate 53, a slide 62 is installed to be movable. An elastic member S is provided inside the slide 62 to provide an elastic force in a direction away from the product m. One end of the slide (S) is fixed to the second main core (58) to support one side of the elastic member (S), and the other end of the slide (75) is fastened so that the slide (62) Support guide pins 70 supported therein are installed. According to the present invention having such a configuration, the inside of the slide 62, the support guide pin for guiding the elastic deformation of the elastic member (S) for providing the elastic force in the direction away from the product (m) the slide 62 ( Since 70 is provided, the elastic member S is prevented from being bent in the process of elastic deformation.

Description

Mold assembly

The present invention relates to a mold assembly, and more particularly, to a mold assembly provided with a slide core is movable to produce a product having an undercut.

The mold assembly is injection molding a product having a specific shape using a synthetic resin as a material. Such a mold assembly is provided with a core having a shape corresponding to that of the product to repeatedly produce a product of the same shape.

When making a product through injection molding, it is common to manufacture a main core that is separated by moving in opposite directions, but when the product is complicated, there is an undercut, and the product cannot be manufactured by the main core alone. Slide cores must be used.

1 is a cross-sectional view of a configuration of a mold assembly according to the prior art.

According to this, the fixed side plate 1 is installed on the fixed side of the molding machine. The fixed side plate 1 has a plate shape having a predetermined area, and the first mold plate 2 is provided on one surface thereof. Description of the structure in which the first mold plate 2 and the fixed side plate 1 are coupled to each other is omitted. A first main core 4 is formed through the first mold plate 2 to mold the shape of the product m.

The fixed side plate 1 is provided with an angular pin (6). The angular pin 6 is installed to be inclined as shown in the drawing, and the slide core assembly 20 to be described below moves relative to each other by the fixed side plate 1 and the movable side plate 10 to be described below. It is moved in the direction orthogonal to.

The movable side plate 10 is installed on the movable side of the molding machine. The movable side plate 10 has a plate shape having an area corresponding to the fixed side plate 1. The movable side plate 10 is provided with a support plate 12 by a spacer block (11). The support plate 12 is formed to penetrate the interference avoiding portion 12 ′ for preventing interference with the angular pin 6.

The second plate 13 is installed on the support plate 12 so as to face the first plate 2. The first mold plate 2 and the second mold plate 13 are in close contact with each other when the product m is molded, and are separated when the molded product m is taken out. A second main core 15 corresponding to the first main core 4 is installed between the support plate 12 and the second template 13.

The slide core assembly 20 is installed on the second mold plate 13 so as to be movable. A slide 22 is provided in the slide core assembly 20, and an angular hole 23 is formed in the slide 22 so that the angular pin 6 passes.

An elastic member S is provided inside the slide 22. The elastic member S serves to provide an elastic force to the slide 22 in the right direction with reference to FIG. 1. That is, the elastic member S serves to support the slide 22 by exerting an elastic force in a direction away from the slide 22 with respect to the second main core 15. This means that when viewed from the drawing, the slide 22 located on the right side is installed upward in a direction A, that is, relative to the gravity direction, and the slide 22 located on the left side is in the B direction, that is, gravity direction. This is because the slide 22 installed toward the A direction may fall in the direction of gravity when the mold assembly is opened, since it is installed toward the lower side relative to. The elastic member S is a cylindrical coil spring.

The slide core 25 is coupled to the tip of the slide 22. The slide 22 moves the slide core 25 in a direction perpendicular to the direction in which the first and second mold plates 2 and 13 move relative to each other along a guide rail (not shown). It moves in the) direction. Reference numeral m 'denotes a part corresponding to an undercut of a product.

The locking block 27 serves to prevent the slide core 25 from being pushed by the injection pressure. The locking block 27 is fastened to the first mold plate 2 by fixing bolts 27 '. Thus, the locking block 27 is integrated with the fixed side plate (1).

The support block 29 serves to fix one side of the locking block 27. The support block 29 is fixed to the locking block 27 by being fixed to the second template 13. The support block 29 also serves to prevent the second mold 13 from being arbitrarily removed when the first mold 2 and the second mold 13 are separated.

However, the prior art as described above has the following problems.

The elastic member S is formed to extend by a predetermined length to provide an elastic force so that the slide 22 can move in a direction orthogonal to the direction in which the first and second mold plates 2 and 13 move relative to each other. . However, since there is no separate fixture structure for fixing the elastic member (S), there is a problem that the elastic member (S) in the process of moving the slide 22 can be prevented from fulfilling its role.

In order to control the distance that the slide 22 is moved away from the product m, the mold assembly is separated, and then the elastic member S is removed from the slide 22, and then the elastic member having a different length. (S) should be installed inside the slide 22. Therefore, there is also a problem in that the need to replace the elastic member (S) with a different length whenever necessary.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, to provide a mold assembly having a support guide pin for supporting the elastic member.

Another object of the present invention is to provide a mold assembly that can adjust the elastic force of the elastic member without having to replace the elastic member.

According to a feature of the present invention for achieving the object as described above, the present invention is installed on the fixed side of the molding machine, the fixed surface is provided with a first mold plate is installed on one side of the first main core for molding the shape of the product Side plates; A movable side plate which is installed on the movable side plate of the molding machine and has a second main plate which is provided with a first main plate to form a predetermined space corresponding to the shape of the product; A slide installed on the second template to move in a direction perpendicular to a direction in which the first main core and the second main core move relative to each other; An elastic member provided inside the slide to provide an elastic force in a direction away from the product; And a support guide pin installed at the inside of the slide and having one end fixed to the second main core to support one side of the elastic member, and the other end to which the fastener is fastened to support the inside of the slide. do.

The support guide pin, one side is fixed to the second main core, the head portion is provided with the elastic member between the other side and the mounting space; And a body part extending in a direction orthogonal from the head to support one side of the elastic member and fastened to the fastener so as to be supported inside the slide.

One side and the other side of the slide facing the second main core is formed so that the mounting space and the spring seating space, respectively, between the mounting space and the spring seating space passes through the mounting space and the spring seating space The through hole is provided with a body portion of the support guide pin.

The through hole has a diameter corresponding to the diameter of the body portion of the support guide pin and is formed smaller than the diameter of the fastener so that the fastener is fixed to the inner surface of the mounting space corresponding to the edge of the through hole.

A washer is fastened between the fastener and the tip of the body of the support guide pin to limit the movement stroke of the slide.

The elastic member is provided extending in a direction parallel to the longitudinal direction of the support guide pin.

In the present invention, the inside of the slide is provided with a support guide pin for guiding the elastic deformation of the elastic member for providing the elastic force in the direction away from the product slide. Therefore, since the elastic member is prevented from being bent in the process of elastic deformation, the operation reliability of the mold assembly is improved.

And in the present invention, the fastener is fastened to prevent the support guide pin from being separated from the slide, can be used by fastening the washer between the support guide pin and the fastener. Therefore, when adjusting the distance away from the product, there is also an effect that workability is improved because only the washer is fastened by separating the fastener from the support guide pin.

Hereinafter, a preferred embodiment of a mold assembly according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view of the configuration of a preferred embodiment of the mold assembly according to the present invention, Figure 3 is a main configuration of the slide constituting the embodiment of the present invention is shown in a cross-sectional view, Figure 4 in the present invention embodiment The configuration of the mold assembly with the movable side plate separated is shown in cross section.

As shown in these figures, the fixed side plate 30 is provided on the fixed side of the molding machine. The fixed side plate 30 is a plate shape having a substantially hexahedral shape, the first mold plate 32 is installed on one surface thereof. The fixed side plate 30 and the first mold plate 32 may be coupled to each other by a bolt or the like.

The first main plate 32 is provided with a first main core 34 forming a shape of the product m. The first main core 34 corresponds to the second template 56 to be described below to form a space corresponding to the shape of the product.

An angular pin 40 is installed on the fixed side plate 30 or the first mold plate 32. The angular pin 40 has a connection portion 42 extending in a direction in which the fixed side plate 30 and the movable side plate 50 to be described below move relative to each other and the driving portion 44 inclinedly extended from the connection portion 42. It consists of. The angular pin 40 drives the slide 62 to be described below with a time difference.

On the other hand, the fixing side plate 30 or the first mold plate 32 is provided with a locking block 46. The locking block 46 serves to prevent the slide 62 is pushed by the injection pressure. To this end, the locking block 46 is formed with an inclined surface 48 is formed in a wedge shape.

The movable side plate 50 is installed on the movable side of the molding machine. The movable side plate 50 is formed in a plate shape having a substantially hexahedral shape corresponding to the fixed side plate 30. A spacer block 52 is installed on the movable side plate 50, and a support plate 53 is installed above the spacer block 52.

The support plate 53 is formed to penetrate the interference avoiding portion 53 '. The interference avoiding portion 53 ′ is formed at a position corresponding to the angular pin 40. The interference avoiding portion 53 'is in communication with the angular hole 64 to be described below. The interference avoiding portion 53 ′ is formed such that one side thereof is opened to communicate with the outside. That is, the interference avoiding portion 53 'is formed so that the slide 62 to be described below opens in a direction away from the product m. The interference avoiding portion 53 ′ is for preventing interference with the angular pin 40.

A support block 54 is provided on the bottom of the interference avoiding portion 53 '. The support block 54 is the interference avoiding portion 53 ′ in which the front end portion of the driving portion 44 of the angular pin 40 is positioned when the fixed side plate 30 and the movable side plate 50 are in close contact with each other. It is provided on one side of the. The support block 54 is fixed on the spacer block 52. The support block 54 serves to support the driving unit 44 of the angular pin 40 so as not to be pushed away from the product m.

The support plate 53 is provided with a second mold plate 56. The second plate 56 is installed to face the first plate 32. The first mold plate 32 and the second mold plate 56 are in close contact with each other when the product m is molded, and are separated when the molded product m is taken out. This is performed by the movable side plate 50 being moved relative to the fixed side plate 30 by the movable side of the molding machine.

The second main core 58 is installed inside the second mold 56. The second main core 58 is also formed to be recessed to correspond to the external appearance of the product m so as to form a partial external appearance of the product m. Of course, the first and second main cores 34 and 58 do not directly form the shape of the product m, but are installed in the first and second main cores 34 and 58 and the shape of the product m. The product m may be formed by a shape core (not shown) that forms a cavity corresponding thereto. In this case, a plurality of shape cores may be installed in each of the first and second mold plates 56 to produce a plurality of products m at the same time.

The auxiliary support plate 63 is installed on the support plate 53. The auxiliary support plate 63 is also provided with an interference prevention part 63 ′ for preventing interference with the angular pin 40. The interference preventing part 63 ′ is formed through the auxiliary supporting plate 63.

The slide assembly 60 is movably installed on the auxiliary support plate 63. Of course, the slide assembly 60 may be installed at a portion formed to be recessed in the second mold 56.

The slide assembly 60 is provided with a slide 62. The slide 62 is provided on the auxiliary support plate 63 so that the movable side plate 50 and the fixed side plate 30 are movable in a direction orthogonal to the direction in which the movable side plate 50 and the fixed side plate 30 move relative to each other.

An angular hole 64 is formed through the slide 62. The angular hole 64 is for driving the slide 62 by passing through the angular pin 40. The angular hole 64 is formed with a driving surface 65 inclined along one inner surface thereof. In addition, the angular hole 64 is further provided with an atmospheric surface 66 which faces the driving surface 65 and is formed relatively in the direction of the movable side plate 50. The air surface 66 is formed to extend in the same direction as the direction in which the fixed side plate 30 and the movable side plate 50 move relative to each other.

A spring seating space 68 is formed in the slide 62. The spring seating space 68 is formed to be recessed on one side of the slide 62 facing the second plate 56. The spring seating space 68 is a space into which the elastic member S to be described below is inserted, and extends in a direction parallel to the mounting space 69. The spring seating space 68 is formed to be open toward the second main core 58.

A mounting space 69 is formed in the slide 62. The mounting space 69 is formed to be recessed on the other side surface of the slide 62 opposite to the surface on which the spring seating space 68 is formed. The mounting space 69 is a space into which a part of the fastener 75 and the support guide pin 70 to be described below is inserted. The mounting space 69 extends in a direction parallel to the moving direction of the slide 62. The mounting space 69 is formed to be open toward the support block 84 to be described below. The mounting space 69 is formed in a shape corresponding to the shape of the fastener 75. In this case, the mounting space 69 is formed to have a length such that the fastener 75 can move by a predetermined distance within the mounting space 69.

As shown in FIG. 3, a through hole 69 ′ is formed in the slide 62. The through hole 69 ′ is a portion penetrated by the body portion 72 of the support guide pin 70 to be described below, and the spring seating space 68 and the mounting space 69 communicate with each other. . The through hole 69 'has a diameter corresponding to the diameter of the body portion 72 of the support guide pin 70, and is formed smaller than the diameter of the fastener 75. This is to fasten the fastener 75 to the inner surface of the mounting space 69 corresponding to the edge of the through hole (69 '), so that the moving distance can be regulated.

The support guide pin 70 is installed in the spring seating space 68 and the mounting space 69 through the through hole 69 '. The support guide pin 70 has a substantially bar shape and extends in a direction perpendicular to a direction in which the first mold plate 32 and the second mold plate 56 move relative to each other. The support guide pin 70 serves to support one side of the elastic member (S) in the direction in which the elastic member (S) is elastically deformed.

The support guide pin 70 is composed of a head portion 71 and the body portion 72, the head portion 71 has a relatively large dimension compared to the outer diameter of the body portion (72). The head portion 71 has a larger outer diameter than the body portion 72. The head 71 is fixed to one side of the second main core 58 to support one end of the elastic member (S). The body portion 72 serves to guide the elastic deformation of the elastic member (S).

An elastic member S is installed between the head 71 and the spring seating space 68 so that both ends thereof are supported. The elastic member S serves to support the slide 62 by exerting an elastic force in a direction away from the slide 62 with respect to the second main core 58. This means that when viewed from the drawing, the slide 62 located on the right side is installed upward in a direction A, that is, relative to the gravity direction, and the slide 62 located on the left side is located in the B direction, that is, gravity direction. This is because the slide 62 installed toward the A direction may fall in the direction of gravity when the mold assembly is opened, since it is installed toward the lower side relative to. The elastic deformation of the elastic member (S) is guided by the body portion 72 of the support guide pin (70).

A fastening groove 73 is formed at one end of the body portion 72. The fastening groove 73 is a part to which the fastener 75 is fastened. One end of the fastener 75 is formed with a screw thread, and is fastened to the fastening groove 73 to be fixed. That is, the fastener 75 is fixed to the body portion 72 of the support guide pin 70 in a state located inside the mounting space (69). The fastener 75 is provided with a tool insertion groove (not shown) into which a tool (not shown) is inserted.

A washer W may be provided between the fastener 75 and one end of the body portion 72. The diameter of the washer (W) is formed to correspond to the diameter of the fastener (75). The washer W serves to limit the movement stroke of the slide 62. That is, the distance that the slide 62 is moved away from the second template 56 is limited as the number of the washers W is increased.

The front end of the slide 62 is provided with a slide core 80 inserted into the cavity formed by the first main core 34, the second template 56 and the front end surface of the slide 62. The slide core 80 serves to form an undercut (m ') portion of the product (m).

A locking guide surface 82 having a slope corresponding to the inclined surface 48 of the locking block 46 is formed at the rear end of the slide 62. The slide 62 may move along the locking guide surface 82. That is, when the locking guide surface 82 of the slide 62 is in contact with the inclined surface 48 of the locking block 46, the slide 62 is the product by the force transmitted by the locking block 46 It moves in a direction toward (m).

A support block 84 is installed in the support plate 53 or the second mold plate 56 to regulate the stroke in which the slide 62 is moved. The support block 84 controls the degree to which the slide 62 is retracted when the first main core 34 and the second template 56 are completely separated. The support block 84 also serves to shield the opened portion of the mounting space 69 of the slide 62.

Hereinafter, the operation of the mold assembly according to the present invention having the configuration as described above in detail.

First, in order to produce a product in the mold assembly of the present invention, the first main core 34 and the second mold plate 56 should be in close contact with each other to form a predetermined space. To this end, when the movable side plate 50 is moved relative to the fixed side plate 30, the driving unit 44 of the angular pin 40 is guided to the driving surface 65 of the angular hole 64. As a result, the slide 62 moves toward the first and second main cores 34 and 58 to be in close contact with the second main core 58.

At this time, the elastic member (S) provided between the head portion 71 of the support guide pin 70 and the mounting space 69 of the slide 62 is compressed to the maximum, the support guide pin 70 The fastener 75 fastened is spaced a predetermined distance from an inner surface of the mounting space 69 corresponding to the edge of the through hole 69 ′ of the slide 62 (see FIG. 1).

When the relative movement of the fixed side plate 30 and the movable side plate 50 is finished, the tip of the drive unit 44 of the angular pin 40 is supported by the support block 54. In this state, the molten material is injected into the cavity formed by the first main core 34 and the second main core 58. As such, when the material is injected into the cavity and the injection is completed, a large pressure is applied to the inside of the cavity.

In addition, the locking block 46 is inserted in a wedge shape between the slide 62 and the support block 84 while the first and second main cores 34 and 58 are in close contact with each other. In this way, the slide 62 is prevented from being pushed by the injection pressure inside the cavity.

When the product m is completed, the first main core 34 of the first template 32 and the second main core 58 of the second template 56 are separated from each other. At this time, the angular pin 40 is connected to the connection portion 42 along the atmospheric surface 66 of the angular hole (64). Thus, the movement of the slide 62 does not occur.

Next, when the first main core 34 and the second main core 58 are further separated, the driving unit 44 of the angular pin 40 may move the driving surface 65 of the angular hole 64. The slide 62 is moved while moving along. Since the slide 62 moves together with the second main core 58 and moves in a direction orthogonal to the moving direction of the second main core 58, the slide 62 does not affect the shape of the product m. 70) can exit the product m.

At this time, the elastic member (S) is a state in which the elastic force is provided to the slide 62 in a direction to be separated from the product (m), the slide 62 is the first plate 32 and the second plate 56 moves in a direction orthogonal to the direction in which they move relative to each other.

When the slide 62 continues to move by the elastic force of the elastic member S, the fastener 75 fastened to the support guide pin 70 is an edge of the through hole 69 'of the slide 62. It is supported on the inner surface of the mounting space 69 corresponding to.

At this time, the slide 62 is no longer moved by the fastener 75 and is fixed to the second mold 56. That is, when the slide core 80 exits the product m, the slide 62 is no longer moved in the direction of separation from the product m.

In this case, the product (m) is separated from the second template 56 and is ready to manufacture the next product. The product (m) is then continuously produced by repeating the process described above.

On the other hand, in this process it is possible to adjust the distance that the slide 62 is moved in a direction away from the product (m). To this end, the operator removes the support block 84 from the mold assembly, and then inserts a tool into the tool insertion groove of the fastener 75 to separate the fastener 75 into the support guide pin 70. .

Next, the worker fastens the washer (W) between the support guide pin 70 and the fastener (75). In this case, the elastic member S does not move the slide 62 as much as the thickness of the washer W (see FIG. 3).

In other words, by inserting the washer (W) between the support guide pin 70 and the fastener 75 to adjust the movement stroke of the slide (62).

And in this process, the elastic deformation of the elastic member (S) is guided by the body portion 72 of the support guide pin 70 is prevented from bending in the process of elastic deformation.

The scope of the present invention is not limited to the embodiments to be described above, but is defined by what is stated in the claims, and various modifications and adaptations can be made by those skilled in the art within the scope of the claims. It is self evident.

1 is a cross-sectional view showing the configuration of a mold assembly according to the prior art.

Figure 2 is a cross-sectional view showing the configuration of a preferred embodiment of a mold assembly according to the present invention.

Figure 3 is a sectional view showing the main portion of the slide constituting the embodiment of the present invention.

Figure 4 is a cross-sectional view showing the configuration of the mold assembly separated from the movable side plate in the embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

30: fixed side plate 32: first mold plate

34: 1st main core 40: angular pin

42: connecting portion 44: driving portion

46: locking block 50: movable side plate

52: spacer block 53: support plate

53 ': avoidance portion 54: support block

56: Second Edition 58: Second Main Core

60: slide assembly 62: slide

63: auxiliary support plate 63 ': interference prevention portion

64: angular hole 68: spring seating space

69: mounting space 69 ': through hole

70: support guide pin 71: head

72: body 73: fastening groove

75: fastener W: washer

S: elastic member 80: slide core

82: locking guide surface 84: support block

m: products

Claims

A fixed side plate provided on the fixed side of the molding machine and having a first mold plate on one surface of which a first main core is formed to shape a product;

A movable side plate which is installed on the movable side plate of the molding machine and has a second main plate which is provided with a first main plate to form a predetermined space corresponding to the shape of the product;

A slide installed on the second template to move in a direction perpendicular to a direction in which the first main core and the second main core move relative to each other;

An elastic member provided inside the slide to provide an elastic force in a direction away from the product; And

It is installed in the slide, one end is fixed to the second main core to support one side of the elastic member and the other end fastening fasteners are supported by the support guide pins; Mold assembly.

The method of claim 1,

The support guide pin,

One side is fixed to the second main core, and the head portion provided with the elastic member between the other side and the mounting space;

And a body part extending in a direction orthogonal from the head to support one side of the elastic member and fastened to the fastener so as to be supported inside the slide.

The method of claim 2,

One side and the other side of the slide facing the second main core is formed so that the mounting space and the spring seating space, respectively, between the mounting space and the spring seating space passes through the mounting space and the spring seating space Mold assembly, characterized in that the through hole is provided with a body portion of the support guide pin.

The method of claim 3, wherein

The through hole has a diameter corresponding to the diameter of the body portion of the support guide pin and is formed smaller than the diameter of the fastener so that the fastener is fixed to the inner surface of the mounting space corresponding to the edge of the through hole. Mold assembly.

The method of claim 4, wherein

Mold assembly, characterized in that the washer is fastened between the fastener and the end of the body portion of the support guide pin to limit the movement stroke of the slide.

The method according to any one of claims 1 to 5,

The elastic member is a mold assembly, characterized in that provided in the direction extending in parallel with the longitudinal direction of the support guide pin.