JP3071961B2 - Runner removal device for molded products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a removing device for removing an intermediate molded product from a mold cavity after casting by an injection molding machine and removing a runner portion from a product portion of the intermediate molded product. About.

[0002]

2. Description of the Related Art An intermediate molded product taken out of a mold cavity after molding by the above-mentioned injection molding machine is usually formed of a product part and a runner part connected to the product part and corresponding to a path of a molten material. By removing the runner portion from the product portion, a product can be obtained. Conventionally, the removal is performed by hitting the product portion with a hammer, and applying an impact to a gate portion, which is a portion where the runner portion is connected to the product portion, to break the product portion.

[0003]

By the way, it has recently been desired that the above-mentioned removal be performed mechanically without using human power. Therefore, it is conceivable to use an arm of the robot to support only one of the product portion and the runner portion, hit the intermediate molded product, and remove the runner portion. However, in this case, the impact due to the impact is transmitted to the arm, and a useless load is applied to the robot, and there is a problem that it takes a long time to remove the runner portion because the impact is wasted. . In order to cope with this problem, it is conceivable to support the intermediate molded product on the arm via a buffer. However, in this case, rattling occurs between the intermediate molded product and the arm. The transfer of the intermediate molded product to the desired position by the arm may be inaccurate.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances. An intermediate molded product formed by injection molding or the like is supported by a robot arm, and a runner portion is hit from the product portion by impact. When the arm is removed, the runner portion is promptly removed by preventing useless load from being applied to the arm, and the transfer of the intermediate molded product to a desired position by the arm is prevented. It is intended to be done exactly.

[0005]

A feature of the present invention to achieve the above object is that an intermediate molded product taken out of a molding portion such as a mold cavity is connected to a product portion and is fused to the product portion. A runner part removing device for a molded article formed of a runner part corresponding to a path of a material and capable of removing the runner part from the product part, wherein only one of the product part and the runner part is removed. Supporting means for detachably supporting, an arm of a robot for detachably supporting the supporting means via a buffer, fixing means for fixing or releasing the fixing of the supporting means and the arm side,
And a hitting means for hitting the product part or the runner part.

[0006] The runner portion includes, for example, a gate in casting, and all of a path corresponding to a molten metal from the gate to a product, and a stamp portion (resin pool) in resin molding. , And all that corresponds to the path of the molten resin from the stamp section to the product section. The runner portion also includes a runner corresponding to a so-called air vent that prevents air from remaining in the mold when a molten metal or a molten resin is injected into the mold.

[0007]

[Operation] The operation of the above configuration is as follows. When removing the runner part 2 from the product part 4 of the intermediate molded article 1, first, the product part 4 or the runner part 2 is supported by the support means 9. Next, the product part 4 or the runner part 2 which is not supported by the support means 9 is hit by the hitting means 19. Then
The runner part 2 and the heavy product part 4 vibrate at different periods, and the load due to the impact concentrates on the gate part 3 where the runner part 2 is connected to the product part 4, and the gate part 3 It will break easily. In this way, the product part 4 is separated from the runner part 2, that is, the product part 4
Is removed from the runner portion 2.

In the above case, the supporting means 9 is supported by the arm 53 of the robot 50 via the buffer 65. At this time, the supporting means 9 and the arm 53 are fixed by the fixing means 72.
Are released from each other (shown by a solid line in FIG. 4), the impact when the product portion 4 or the runner portion 2 is hit is absorbed by the buffer 65, and the impact is transmitted to the arm 53. Is prevented. In addition, the robot 5
When the intermediate molded article 1 is to be conveyed by the zero arm 53, the support means 9 and the arm 53 are fixed to each other by the fixing means 72 (illustrated by phantom lines in FIG. 4). Then, the intermediate molded product 1 supported by the support means 9 accurately follows the operation of the arm 53 without play.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIGS. 1 to 4 show a first embodiment.
In the drawings, reference numeral 1 in the figure denotes an aluminum intermediate product, which is taken out of a mold cavity of an injection molding machine in casting. The intermediate molded product 1 is integrally formed with a product part 4 and a runner part 2 connected to the product part 4, and the product part 4 corresponds to a path of a molten aluminum material as a molten material in the mold. It is. Further, a portion where the runner portion 2 is connected to the product portion 4 is a gate portion 3 having a small sectional area.

A runner part removing device 6 for removing the runner part 2 from the product part 4 is provided. In addition,
For convenience of explanation, a direction indicated by an arrow Fr in FIG. The runner removing device 6 is a robot 5
0 is provided. The robot 50 includes a robot body 52 rotatably supported on a base 7 around a vertical axis 51,
And an arm 53 extending from an upper portion of the robot main body 52. The arm 53 is supported by the robot main body 52 so as to be vertically swingable and movable in the horizontal direction, and the supporting means 9 is attached to a protruding end of the arm 53.

On the other hand, the stamp unit 1 is
When the gripper 4 is gripped, the runner part main body 1 from the stamp part 14 to the gate part 3 of the runner part 2
A striking means 19 for striking 8 is provided. The striking means 19 has a vibrator 32, which is composed of a cylinder tube 33 and a vibrating rod 34. The cylinder tube 33 is mounted on a column 56 projecting from a gantry 55. The vibrating rod 34 projects slidably forward from the front end of the cylinder tube 33, and vibrates back and forth by supplying pressurized air to the cylinder tube 33. Further, a belt conveyor 57 is provided near the side of the hitting means 19.

1 and 3, the support means 9 will be described. An arm end 59 extending in a direction perpendicular to the arm 53 is provided at a projecting end of the arm 53 via a known attachment / detachment mechanism. The fixed base 60 is rotatable to a predetermined angle around the axis 61 of the arm end 59. A slide movable base 62 is slidably supported on the slide fixed base 60 in the radial direction of the axis 61, and the slide movable base 62 can slide to a predetermined position with respect to the slide fixed base 60. It has been.

A box-shaped bracket 63 is mounted on the slide movable base 62, and a bottom plate 64 of the box-shaped bracket 63 extends substantially parallel to the axis 61 of the arm end 59. A bracket 66 is attached to the bottom plate 64 via four rubber cushions 65. The buffer 65 has a columnar shape, and its axis extends in a direction substantially perpendicular to the axis 61 of the arm end 59.

The hand chuck 6 is attached to the bracket 66.
The hand chuck 67 is opened and closed by a chuck cylinder 68 via a toggle mechanism 69. In the hand chuck 67,
The outer chuck teeth 70 and the inner chuck teeth 71 are provided, and the stamp section 14 of the runner section 2 in the intermediate molded product 1 is held by the outer chuck teeth 70 of the hand chuck 67 that has been closed. On the other hand, the inner chuck teeth 71 can hold another insertion hand or a spray for spraying a release agent.

In FIG. 1, FIG. 3 and FIG. 4, a fixing means 72 for fixing or releasing the fixing of the supporting means 9 and the box-shaped bracket 63 on the arm 53 side is provided. The fixing means 72 includes the box-shaped bracket 63.
Gripping cylinders 74 attached to the outer plate 73
These gripping cylinders 74 are arranged at equal intervals around the bracket 66. The piston rod 75 of each of the gripping cylinders 74 is freely movable toward and away from the bracket 66, and the fitting hole 76 is formed in the bracket 66 corresponding to the piston rod 75.
Are formed.

As shown by the solid line in FIG. 4, when the gripping cylinder 74 is reduced, the piston rod 75 is separated from the fitting hole 76, and the support means 9 and the box-shaped bracket 63 on the arm 53 side are mutually moved. Is released.

On the other hand, as shown by the phantom line in FIG.
5 is fitted into the fitting hole 76, and the protruding end of the piston rod 75 presses against the bottom surface of the fitting hole 76, whereby the support means 9 and the box-shaped bracket 63 are fixed to each other.

When removing the runner section 2 from the product section 4 of the intermediate molded article 1, the runner section 2 is moved by the vibration rod 34 of the striking means 19 by the operation of the robot 50.
To face. During the operation of the robot 50, FIG.
As shown by a solid line in FIG. 3 and an imaginary line in FIG. 4, the piston rods 75 of the gripping cylinders 74 advance, and the piston rods 75 are fitted into the fitting holes 76, and the piston rods 75 Presses the inner surface of the fitting hole 76 to fix the bracket 66 to the box-shaped bracket 63.

Therefore, during the operation of the robot 50, the bracket 66, the hand chuck 67, and the intermediate molded product 1 supported by the bracket 66 and the hand chuck 67 are held by the gripping cylinder 74.
Thereby, the arm end 59 is supported. Therefore, during the operation period of the robot 50, the bracket 6
6, the hand chuck 67 and the intermediate molded product 1 are supported without backlash on the arm end 59 side,
Is accurately conveyed to a desired position by the robot 50.

Next, the runner portion 2 of the intermediate molded product 1 is opposed to the vibrating rod 34 of the striking means 19, and the robot 5
When the operation of “0” is stopped, the piston rod 75 of each of the gripping cylinders 74 retreats and the fixing of the bracket 66 is released as shown by a solid line in FIG. Therefore, thereafter, the bracket 66, the hand chuck 67, and the intermediate molded product 1 are supported on the arm end 59 side only via the buffer 65.

In this state, the vibrating rod 34 is vibrated by the operation of the striking means 19 to strike the runner portion main body 18 of the runner portion 2 near the gate portion 3. Then, the product section 4 is separated from the runner section 2. Then, the runner part 2 removed from the product part 4 as described above is put into a return material bucket (not shown) and recast.
On the other hand, the product section 4 is carried out to the next process by the belt conveyor 57.

In the above case, the vibration transmitted from the intermediate molded product 1 to the arm end 59 is absorbed by the buffer 65, that is, the vibration is prevented from being transmitted to the arm end 59. As described above, since the useless consumption of the vibration is suppressed, the load due to the impact effectively concentrates on the gate portion 3 and the runner portion 2 is easily removed.
Further, since no vibration is transmitted to the arm end 59, the robot 50 is protected. Each of the shock absorbers 65 has a columnar shape, and its axial center extends forward and backward.
The vibration direction of 4 is also the front-back direction. Therefore, the vibration transmitted from the intermediate molded product 1 to the arm end 59 is absorbed by the elastic deformation of the buffer 65 in the axial direction.

The runner part 2 of the intermediate molded product 1 supported by the robot 50 as described above is
When the vibration is applied, the vibration may be applied from the left and right directions. Also, the stamp portion 14 of the intermediate molded product 1 is shown in FIG.
Alternatively, the vibration rod 34 may be supported as shown by the imaginary line in FIG. In this case, the vibration transmitted from the intermediate molded product 1 side to the arm end portion 59 side is more effectively absorbed by the elastic deformation of the buffer body 65 in the shearing direction.

Second Embodiment FIGS. 5 and 6 show a second embodiment. According to this, the bottom plate 6 of the box-shaped bracket 63
Reference numeral 4 extends in a direction orthogonal to the axis 61 of the arm end 59. The axis of each buffer 65 is substantially parallel to the axis 61. The stamp portion 14 of the intermediate molded product 1 is gripped by the hand chuck 67, and the runner portion 2 of the intermediate molded product 1 is hit by the vibration of the vibration rod 34 of the hitting means 19. At this time, since the axis of each buffer 65 extends in the left-right direction, the vibration direction of the vibrating rod 34 is in the front-rear direction. The vibration that is going to be absorbed is more effectively absorbed by the elastic deformation of the buffer body 65 in the shearing direction. Other configurations and operations are the same as those in the first embodiment. Therefore, in the drawings, common components are denoted by common reference numerals, and description thereof is omitted.

Third Embodiment FIGS. 7 and 8 show a third embodiment. According to this, the outer chuck teeth 70 of the hand chuck 67 are outward teeth, and the opening of the hand chuck 67 causes the outer chuck teeth 70 to open.
Presses against the inner peripheral surface of the inner hole 4a of the product part 4, whereby the product part 4 is supported by the hand chuck 67. In addition, reference numeral 77 denotes a return material bucket into which the removed runner portion 2 is put. Reference numeral 78 denotes a product bucket into which the product unit 4 is put. Other configurations and operations are the same as those in the first embodiment. Therefore, in the drawings, common components are denoted by common reference numerals, and description thereof is omitted.

Fourth Embodiment FIGS. 9 and 10 show a fourth embodiment. According to this, the fixing means 72 has a support base 80 erected on the slide movable base 62, and this support base 8
At 0, a fixed cylinder 81 whose axis extends forward and backward is supported. The fixed cylinder 81 is a cylinder tube 8
2, a piston 84 that is axially slidably fitted into a pressure chamber 83 in the cylinder tube 82, and a piston that extends rearward from the piston 84 and projects rearward from the rear end of the cylinder tube 82 And a rod 85. The protruding end of the piston rod 85 passes through a through hole 86 formed in the support base 80, and a truncated cone-shaped locking portion 87 is attached to the protruding end of the piston rod 85.

Locking projections 88 projecting rearward from upper, lower, left and right corners of the rear end surface of the cylinder tube 82 are provided. These locking projections 88 are attached to the cylinder tube 82 by bolts 89. Screwed. Each of the locking projections 88 has a circular cross section,
An intermediate part before and after that is a sliding hole 9 formed in the support base 80.
The fixed cylinder 81 is supported on the support base 80 as described above. A front stopper 91 and a rear stopper 92 are protruded from front and rear portions of the outer peripheral surface of each of the locking projections 88, respectively.

On the other hand, a bracket 66 of the support means 9 is attached to the support base 80 via a buffer 65, and the buffer 65 is, as viewed from the front, the fixed cylinder 8
Four are provided so as to surround 1. Bracket 6 above
6 is provided with a locking recess 94 having a conical surface into which the locking portion 87 is fitted. Also, the bracket 6
6 is provided with a locking hole 95 into which the protruding end of the locking projection 88 is removably fitted.

When compressed air is supplied to the pressure chamber 83 of the fixed cylinder 81 in front of the piston 84 as shown above the center line in FIG. 9, the fixed cylinder 81 is extended and locked. The portion 87 presses the bottom surface of the locking concave portion 94 to move the cylinder tube 82 forward. Then, the locking projection 88 also moves forward with this, the protruding end of the locking projection 88 is separated from the locking hole 95, and the fixing between the support means 9 and the arm 53 side is released. At this time, the cylinder tube 82 is moved forward until the rear stopper 92 comes into contact with the support base 80.

On the other hand, as shown below the center line in FIG. 8, when the compressed air is supplied to the pressure chamber 83 of the fixed cylinder 81 behind the piston 84, the fixed cylinder 81 contracts. At this time, the locking portion 87 is pressed against the inner peripheral surface of the locking recess 94, and the front stopper 91 is
Until it comes into contact with the cylinder tube 82. At this time, the protruding end of the locking projection 88 fits into the locking hole 95 and presses against the opening edge of the locking hole 95, whereby the support means 9 and the arm 53 side are fixed to each other. . Other configurations and operations are the same as those in the first embodiment. Therefore, in the drawings, common components are denoted by common reference numerals, and description thereof is omitted.

[0031]

According to the present invention, there is provided a supporting means for detachably supporting only one of a product part and a runner part constituting an intermediate molded product taken out of a molding part such as a mold cavity. An arm of a robot that detachably supports the supporting means via a buffer, fixing means for fixing or releasing the fixing of the supporting means and the arm side, and hitting means for hitting the product part or the runner part. Therefore, when removing the runner portion from the product portion of the intermediate molded article, first, one of the product portion or the runner portion is supported by the supporting means, and the other is hit by the hitting means. Then, the product portion is separated from the runner portion by the load due to the impact, that is, the runner portion is removed from the product portion.

In the above case, the supporting means is supported by the arm of the robot via the buffer. At this time, if the fixing of the supporting means and the arm is released by the fixing means, the product portion or the runner The impact when the part is hit is absorbed by the buffer, and the impact is prevented from being transmitted to the arm. Therefore, even when the runner portion is removed by hitting, unnecessary load is prevented from being applied to the robot arm, and the load is concentrated on the connection portion between the runner portion and the product portion, and removal of the runner portion is prevented. It is done promptly. When the intermediate molded product is to be transported by the arm of the robot, the support means and the arm may be fixed to each other by the fixing means. In this case, the intermediate molded product supported by the support means is The movement of the arm follows the movement of the arm accurately without any play. Therefore, the transfer of the intermediate molded product to the desired position by the arm is accurately performed.

[Brief description of the drawings]

FIG. 1 is a partially enlarged view of FIG. 2 in Embodiment 1.

FIG. 2 is an overall side view in the first embodiment.

FIG. 3 is a view taken along line 3-3 in FIG. 1 in the first embodiment.

FIG. 4 is a partially enlarged sectional view of FIG. 3 in the first embodiment.

FIG. 5 is a diagram corresponding to FIG. 1 in the second embodiment.

FIG. 6 is a view taken along line 6-6 of FIG. 5 in the second embodiment.

FIG. 7 is an overall side view according to a third embodiment.

FIG. 8 is a partially enlarged view of FIG. 7 in the third embodiment.

FIG. 9 is a diagram corresponding to FIG. 1 in the fourth embodiment.

FIG. 10 is a view of Example 4 shown in FIG. 9 as viewed from the rear.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Intermediate molded product 2 Runner part 3 Gate part 4 Product part 6 Runner part removal device 9 Support means 14 Stamp part 18 Runner part main body 19 Hitting means 50 Robot 53 Arm 65 Buffer body 72 Fixing means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-81260 (JP, A) JP-A-50-154353 (JP, A) JP-A-4-356345 (JP, A) JP-A-60-1985 72661 (JP, A) JP-A-6-31424 (JP, A) JP-A-5-104238 (JP, A) JP-A-5-92251 (JP, A) Japanese Utility Model Application Showa 56-88516 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B22D 31/00 B22D 17/20 B29C 37/02 B29C 45/38

Claims (1)

(57) [Claims] An intermediate molded product taken out of a molding portion such as a mold cavity is formed of a product portion and a runner portion connected to the product portion and corresponding to a path of a molten material, and a runner portion from the product portion. A runner portion removing device for a molded article that enables removal of a molded product, comprising: a support means for detachably supporting only one of the product part and the runner part; and a detachable support means for the support means via a buffer. An apparatus for removing a runner part of a molded product, comprising: an arm of a robot to be supported; fixing means for fixing or releasing the support means and the arm; and hitting means for hitting the product part or the runner part.