KR100931803B1 - Fastening Structure of Injection Molding Machine - Google Patents

Abstract

The present invention relates to a fastening structure of an injection molding machine clamping device, and after moving the column member coupled to the movable mold plate to move the movable mold constituting the clamping device to the fixed mold plate, a small amount of fastening members for fixing the column member. The rotary motion is to reduce the noise and vibration.

The present invention and the first fixed plate; A second fixing plate fixed and installed at intervals from the first fixing plate; a movable plate provided to be movable between the first fixing plate and the second fixing plate; A shape piston provided in the second fixing plate and having an opening; A column member provided through the shape piston and having a fastening groove formed therein; A fastening member provided in the body piston; As a structure comprising a guide member having a plurality of guide holes formed on one side of the fastening member,

The fastening member is a structure in which a projection is formed to be fitted into each of the plurality of guide holes, the rotating shaft member is coupled to allow the fastening member to be rotatable by the guide member.

According to the present invention having such a structure, in the clamping apparatus of the injection molding machine, the rotary shaft member is rotated on one side of the fastening member for fixing the column member, so that a small amount of rotational reciprocating motion is performed in the space of the mold piston. There is an effect that noise and vibration can be reduced.

Injection molding machine, clamping device, boosting, clamping piston, fastening member, rotation, noise, vibration, reduction

Description

Locking Structure of Clamping Apparatus in Injection Molding Machine

The present invention relates to a fastening structure of an injection molding machine clamping device, and more particularly, a fastening member for fixing a column member after moving of a column member coupled to a movable mold plate to move a movable plate constituting the mold clamping device to a stationary plate. It is to reduce the noise and vibration by a small amount of rotational movement.

In general, an injection molding machine is mainly composed of an injection apparatus and a mold clamping apparatus, and the mold clamping apparatus basically controls the opening and closing operations of the mold, that is, the mold opening and closing operations. In the state where the mold closing operation of the mold clamping device is completed, a predetermined molten material is injected from the injection apparatus into the mold. At this time, the molten material flowing into the mold is generally introduced at a high pressure. Therefore, the mold must be strongly fastened so that the mold is not opened by the high pressure molten material.

Referring to the structure of the conventional injection molding machine, as shown in the accompanying drawings, Figure 1, the conventional mold clamping device is fixed to the first fixed plate 10, the first fixed plate 10 at intervals, The second fixed plate 20 is installed, and the movable plate 30 is provided to be movable between the first fixed plate 10 and the second fixed plate 20.

The fixed mold part 11 is formed in the first fixed mold 10, and the movable mold part 31 is formed in the movable mold 30.

In addition, the movable mold 30 is moved on the tie bar 40 connected between the first and second fixed molds 10 and 20.

In addition, a column member 50 is connected to one side of the movable plate 30 and penetrates the inside of the second fixed plate 20 so as to be movable together with the movable plate 30.

A plurality of fastening grooves 51 are formed along the longitudinal direction on the outer circumferential surface of the column member 50.

In addition, the column member 50 is provided with a body piston 60 which is provided inside the second fixing plate 20 and moves during the step-up operation, and the body piston 60 is formed of the second fixing plate 20. The first and second oil chambers 21 and 22 are formed to be movable by the high-pressure hydraulic oil when they are provided therein, and the column member 50 penetrates the opening 61 formed in the body piston 60. will be.

On the other hand, a space 62 is formed on one side of the shaped piston 60, a guide for moving the plurality of fastening members 70 and the plurality of fastening members 70 in the space 62. The member 80 and the cylinder 90 are provided.

Each fastening member 70 is formed with a protrusion 71 in the direction of the guide member 80, the guide member 80 is formed in a circular shape, a plurality of guide holes 81 in the circumferential direction, It is the structure which the protrusion part 71 is fitted.

In addition, a lower portion of the movable die 30 is provided with a movable cylinder 100 to move the movable die 30.

The rod 91 of the cylinder 90 is stretched and connected to one side of the guide member 80 to rotate the guide member 80 by a predetermined angle.

In the conventional mold clamping device having such a configuration, the movable mold 30 moves toward the first stationary plate 10 by the operation of the movable cylinder 100 to move closer to the first fixed mold 10 (a mold closing process).

During the mold closing process, the column member 50 provided on one side of the movable die 30 is also moved at the same time. Since the fastening member 70 and the column member 50 are not fastened, the column member 50 is shaped. In the opening 61 of the piston 60 is to move toward the first fixed plate 10 together with the movable plate 30.

In this state in which the movable plate 30 is close to the first fixed plate 10, the step-up operation is performed. As shown in FIG. 2, the fastening member 70 is engaged with the moved column member 50. The moving die 30 is in close contact with the first fixed plate 10 by the movement of the mold piston 60 in the fixed state.

More specifically, in the state in which the movable plate 30 is close to the first fixed plate 10, by the operation of the cylinder 90, the rod 91 is contracted to rotate the guide member 80 in one direction. When the projection 71 of the fastening member 70 inserted into the guide hole 81 formed in the guide member 80 is moved in the center direction by moving the fastening groove formed on the outer circumferential surface of the column member 50 ( 51) to be tightened.

In this state, when the high-pressure hydraulic oil is supplied to the first oil chamber 21 and pressurized, the mold piston 60 is finely moved, and the moving force of the mold piston 60 is maintained as it is, the fastening member 70 and the column. It is transmitted to the member 50 and acts as a force to boost.

Therefore, the movable plate 30 connected to the column member 50 is pressed against the first stationary plate 10 and the pressure raising operation is completed (molding process).

Of course, at this time, the movable cylinder 100 provided in the lower portion of the movable die 30 is contracted in response to the pushing force of the movable die 30 as described above.

Since the operation of separating the first fixed plate 10 and the movable plate 30 in close contact with the mold closing and clamping process, the detailed description is omitted.

Here, in the conventional mold clamping device, a fastening member 70 is provided in the space 62 of the mold piston 60, and when the linear movement in the center direction is performed, the space between the space 62 and the fastening member 70 is reduced. Due to the space, the fastening member 70 is shaken when moving up and down in the drawing, and noise and vibration are generated. If there is no space, the up and down movement becomes impossible.

Moreover, since the fastening member 70 is moved by the guide hole 81 of the guide member 80, a large force is required, and accordingly the cylinder 90 for rotating the guide member 80 must be large, As long as the device is enlarged to occupy a lot of installation space, there is a problem such that the cost also increases.

Accordingly, the present invention has been invented to solve the conventional problems as described above, even if the molding apparatus of the injection molding machine is operated at a high speed, the fastening member for fixing the column member can reduce the noise and vibration by a small amount of rotational movement. It would be.

The present invention and the first fixed plate;

A second fixing plate fixed and installed at intervals from the first fixing plate;

A movable plate provided to be movable between the first fixed plate and the second fixed plate;

A shape piston provided in the second fixing plate and having an opening;

A column member provided through the shape piston and having a fastening groove formed therein;

A plurality of fastening members provided in the body piston;

In the injection molding machine molding apparatus consisting of a guide member formed with a plurality of guide holes on one side of the plurality of fastening members,

The fastening member has a structure in which a protrusion part to be fitted into each of the plurality of guide holes and a rotation shaft member for allowing the fastening member to be rotatable by the guide member are coupled.

A cap may be provided at an end portion of the rotating shaft member coupled to the fastening member.

An insertion hole is formed in the fastening member to allow the rotation shaft member to penetrate, and a coupling groove is formed in the inner lower surface of the shape piston to allow the rotation shaft member to be fixed through the insertion hole.

As described above, in the mold clamping apparatus of the injection molding machine, the rotary shaft member is rotated on one side of the fastening member for fixing the column member, thereby making a small amount of rotational reciprocating motion in the space of the mold piston. And vibration can be reduced.

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

The same components as in the prior art will be described with the same reference numerals, and detailed description thereof will be omitted, and new components will be described in detail with the new reference numerals.

The present invention, as in the prior art, the first fixed plate 10, the second fixed plate 20 which is fixed and installed at intervals with the first fixed plate 10, and the first fixed plate 10 and The movable plate 30 is provided to be movable between the second fixing plate 20.

The fixed mold part 11 is formed in the first fixed mold 10, and the movable mold part 31 is formed in the movable mold 30.

In addition, the movable mold 30 is moved on the tie bar 40 connected between the first and second fixed molds 10 and 20.

In addition, a column member 50 is connected to one side of the movable plate 30 and penetrates the inside of the second fixed plate 20 so as to be movable together with the movable plate 30.

A plurality of fastening grooves 51 are formed along the longitudinal direction on the outer circumferential surface of the column member 50.

In addition, the column member 50 is provided with a body piston 60 which is provided inside the second fixing plate 20 and moves during the step-up operation, and the body piston 60 is formed of the second fixing plate 20. The first and second oil chambers 21 and 22 are formed to be movable by the high-pressure hydraulic oil when they are provided therein, and the column member 50 penetrates the opening 61 formed in the body piston 60. will be.

On the other hand, a space 62 is formed on one side of the shaped piston 60, a guide for moving the plurality of fastening members 70 and the plurality of fastening members 70 in the space 62. The member 80 and the cylinder 90 are provided.

Each fastening member 70 is formed with a protrusion 71 in the direction of the guide member 80, the guide member 80 is formed in a curved shape a plurality of guide holes 81 in the circumferential direction, It is the structure which the protrusion part 71 is fitted.

In addition, a lower portion of the movable die 30 is provided with a movable cylinder 100 to move the movable die 30.

The rod 91 of the cylinder 90 is stretched and connected to one side of the guide member 80 to rotate the guide member 80 by a predetermined angle.

Here, in the present invention, the insertion hole 70a penetrates and is formed in one surface of the plurality of fastening members 70 so that the rotary shaft member 72 is inserted into the lower surface of the space portion 62 of the body piston 60. It is a structure coupled to each formed coupling groove (60a). A cap 73 may be covered at an end of the rotary shaft member 72.

In addition, the fastening member 70 is rotatably provided by the rotating shaft member 72 in the space 62 of the body piston 60 and is covered by the guide member 80. The rotating shaft member 72 ) Is formed to be relatively larger than the thickness of the fastening member 70, so that a gap is formed in the space 62 of the guide member 80 and the shaped piston 60, thereby rotating the fastening member 70. It is a structure that can be made smoothly.

The rotary shaft member 72 may be configured by means of various structures such as pins, bolts (stud bolts, etc.).

In the present invention having such a configuration, the mold closing process (transfer operation), the clamping process and the boosting operation of the mold clamping device are the same as in the prior art, and thus detailed description thereof will be omitted.

7 and 8, when the guide member 80 rotates in one direction by the rod 91 of the cylinder 90, the protrusion 71 of the fastening member 70 may be rotated in the clamping process. ) Is fitted into the guide hole 81 of the guide member 80, so that each fastening member 70 is moved in the center direction. At this time, one side of the fastening member 70, the rotating shaft member 72 is coupled to the mold piston 60, so that each of the fastening member 70 is rotated about the rotary shaft member 72 in the center direction.

Accordingly, the fastening operation is completed by being fitted into the fastening grooves 51 of the column member 50, and then, a high-pressure working oil is supplied through a boosting operation, that is, through the first oil chamber 21 of the mold piston 60. Thus, the body piston 60 moves in the second fixed plate 20 so that the column member 50, the fastening member 70, and the movable plate 30 move simultaneously to closely contact the first fixed plate 10. .

Thus, in the present invention, when the clamping device is operated at a high speed by rotating the fastening member for fastening the column member through the rotary shaft member when the clamping device is operated, the fastening member performs a small amount of reciprocating rotational movement to reduce noise and vibration. Can be reduced.

Moreover, since the fastening member can only repeat the rotational motion by the rotating shaft member by the rotating shaft member of the fastening member, noise and vibration can be reduced because there is no other movement.

Although the present invention has been described for the embodiments of the present invention based on the accompanying drawings for convenience, it is obvious that various modifications and changes are possible within the scope of the technical idea of the present invention.

 For example, the present invention can be applied as a fastening structure for preventing a malfunction of the piston or a fastening structure for connecting the conveying operation and the boosting operation by separating the conveying operation and the boosting operation like the injection molding machine.

1 is a cross-sectional view showing the structure of a conventional injection molding machine.

2 is a cross-sectional view showing the structure of a conventional injection molding machine, showing a state in which the movable mold is in close contact with the first fixed plate by the pressure-up operation.

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a cross-sectional view taken along line B-B of FIG. 2.

Figure 5 is an exploded perspective view showing a fastening structure according to the present invention.

Figure 6 is an exploded perspective view showing a portion of the fastening structure according to the present invention.

Figure 7 is a longitudinal cross-sectional view showing a state in which the fastening structure according to the invention coupled in the mold clamping device.

8 is a longitudinal cross-sectional view showing a state in which the fastening member is rotated in the center direction by the operation of the cylinder in the state of FIG.

[Code Description in Drawings]

10: first fixed plate

11: fixed mold part

20: second fixed plate

21: first loss

22: second room

30: moving plate

31: moving mold part

40: tie bar

50: column member

51: fastening groove

60: body piston

60a: coupling groove

61: opening

62: space part

70: fastening member

70a: insertion hole

71: protrusion

72: rotating shaft member

73: cap

80: guide member

81: guide ball

90 cylinder

91: load

100: moving cylinder

Claims (3)

A first stationary plate 10; A second fixing plate 20 fixed and installed at intervals from the first fixing plate 10; A movable plate 30 provided to be movable between the first fixed plate 10 and the second fixed plate 20; A shaped piston 60 provided inside the second fixing plate 20 and having an opening 61 formed therein; A column member 50 provided through the shape piston 60 and having a fastening groove 61 formed therein; A plurality of fastening members 70 provided in the body piston 60; As a structure including a guide member 80 is formed with a plurality of guide holes 81 on one side of the plurality of fastening members 70, The fastening member 70 includes a protrusion 71 to be fitted into each of the plurality of guide holes 81, and a rotation shaft member 72 to allow the fastening member 70 to be rotatable by the guide member 80. Fastening structure of the injection molding machine clamping device, characterized in that coupled. The method according to claim 1, Fastening structure of the injection molding machine, characterized in that the cap 73 is provided at the end of the rotating shaft member 72 is coupled to the fastening member (70). The method according to claim 1 or 2, The fastening member 70 has an insertion hole 70a through which the rotation shaft member 72 passes, and the rotation shaft member 72 passes through the insertion hole 70a on the inner lower surface of the body piston 60. Fastening structure of the injection molding machine, characterized in that the coupling groove (60a) is formed to be fixed by.

Images