JP3072393B2 - 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 molded product for removing a runner portion from a product portion of an intermediate molded product after removing the intermediate molded product from a mold cavity by, for example, molding with a die casting machine during casting. And a runner part removing device.

[0002]

2. Description of the Related Art An intermediate molded product taken out of a mold cavity after being molded by a die casting machine at the time of casting is usually formed of a product portion and a runner portion connected to the product portion and corresponding to a path of a molten material. ing.

[0003] If the runner part is removed from this product part,
Conventionally, a product is obtained.In this removal, first, the product section is fixed so that the runner section is cantilevered, and an operator hits the runner section with a hammer. This is done by breaking the portion that connects to.

[0004]

By the way, in the conventional device, the product portion is fixed when the runner portion is removed. In this case, consideration is given to prevent the product from being damaged by the jig. Therefore, the fixing operation is complicated, and the removing operation of the runner portion is complicated.

[0005] Therefore, the runner portion is gripped so that the molded product cantilevered, the vibrating rod that can reciprocate is moved to the position of the runner portion, and the vibrating rod is reciprocated to move the runner portion. By removing the runner portion from the product portion by hitting, the runner portion can be removed from the product portion of the intermediate molded product by a simple operation in die casting or the like.

However, in products having different shapes, the distance between the gripping position of the runner portion and the hitting position is different from each other. Therefore, in the case of a reciprocating vibrating rod,
It is preferable to hit a little before the maximum stroke in order to obtain a large hitting force, but if the product shape changes in this way, the position where the vibrating rod hits the runner part in the reciprocating trajectory of the vibrating rod changes, and There are problems such as the inability to reliably remove the runner portion from the product portion of the product, and a decrease in the impact efficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a runner portion removing device for a molded product capable of reliably removing a runner portion from a product portion of the molded product or improving hitting efficiency. It is intended to provide.

[0008]

In order to solve the above-mentioned problems, the present invention relates to a method in which a molded product taken out of a molding part such as a mold cavity is connected to a product part and connected to the product part in the same manner as a molten material. A gripper mechanism formed of a runner portion that holds the runner portion so as to bring the molded product into a cantilever state; and a cylinder that reciprocates and supports a vibrating rod that reciprocates and strikes the runner portion. A runner portion removing device for a molded product, which is capable of removing a runner portion from the product portion by the operation of the vibrating rod, wherein at least one of the gripping mechanism or the cylinder is attached to the removing device body relative to the vibrating rod. In a reciprocating direction and can be fixed at an arbitrary position.

The runner portion includes, for example, a gate in casting and all that corresponds to a path of 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. In addition, the runner part includes a part corresponding to a so-called air vent that prevents air from remaining in the mold when molten or molten resin is injected into the mold.

[0010]

According to the present invention, when the runner is gripped by the gripping mechanism so that the molded product is in a cantilevered state, and the vibrating rod is reciprocated to strike the runner, the runner and the heavy product are separated. Vibrates at different periods and the load due to the impact concentrates on the part where the runner part is connected to the product part, this part is easily broken and the runner part and the product part are separated, and in this way from the product part The runner part is removed. When working on products having different shapes, at least one of the gripping mechanism and the cylinder is moved in the reciprocating direction of the vibrating rod with respect to the removing device main body. Here, the gripping mechanism or the cylinder is set so that the vibrating rod hits the runner portion slightly before the maximum stroke, in other words, the distance between the hit position of the runner portion and the cylinder is constant regardless of the product shape. Adjust the position of.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. 1 is a front view of a runner portion removing device for a molded product, FIG. 2 is a view as viewed from an arrow A in FIG. 1, FIG. 3 is an enlarged view of a part of FIG. 1, and FIG. 4 is a view as viewed from an arrow B in FIG.

In the figure, reference numeral 1 denotes an intermediate molded product made of aluminum, which is taken out of a mold cavity of a die casting machine in casting. The intermediate molded product 1 is integrally formed with a product part 1a and a runner part 1b connected to the product part 1a, and the runner part 1b corresponds to a path of a molten aluminum material as a molten material in a mold. Further, a portion where the runner portion 1b of the molded product 1 is connected to the product portion 1a is a gate portion 1c having a small sectional area.

An apparatus for removing a runner portion of a molded product is for removing a runner portion 1b from a product portion 1a of the molded product 1. The device for removing a runner portion is provided on a base 10 and on the base 10. And a mount 11 for holding the runner 1b at the center thereof so as to make the molded product 1 cantilevered. The runners 1b are provided on both sides of the gripper 12. Striking mechanism 1
3 are provided.

The gripping mechanism 12 means all the members for gripping the molded article 1 in a cantilevered state, and is a mechanism including a holding means 14, a jack 19, a block 20, a guide shaft 25 and the like which will be described later. The striking mechanism 13 includes a vibrating rod 64 that reciprocates and strikes the runner portion 1b, which will be described later,
A cylinder 6 that supports the vibrating rod 64 so that it can reciprocate freely.
It consists of four.

At least one of the gripping mechanism 12 and the cylinder 64 of the striking mechanism 13 is configured to be movable relative to the removing apparatus main body X in the reciprocating direction of the vibration rod 64 and fixed at an arbitrary position. The movement of the mechanism 12 does not require the entire gripping mechanism 12 to move, and it is sufficient that at least the gripping position of the runner 1b moves. In this embodiment, an example in which only the gripping mechanism 12 moves will be described. Alternatively, only the cylinder 64 or both the gripping mechanism 12 and the cylinder 64 may be moved in the reciprocating direction of the vibration rod 64. Is also good.

Hereinafter, the gripping mechanism 12 will be described in detail. A cylinder part 15 of the holding means 14 constituting the gripping mechanism 12 is provided on the gantry 11 via a bracket 16, and a rod 17 is provided on the cylinder part 15 so as to be able to expand and contract in the horizontal direction. A block 18 is provided at the tip of the rod 17, and the block 18
Is pressed against the block 20 of the jack 19. Of the runner portion 1b of the molded product 1, the rod 1
The portion 1d gripped by the block 18 of the block 7 and the block 20 of the jack 19 has a disk shape.

The molded article 1 thus gripped by the gripping mechanism 12 is held by the hand 22 of the robot 21 which is electronically controlled, and the block 18 of the rod 17 of the holding means 14 is held.
And the block 20 of the jack 19, the runner part 1b of the molded article 1 is located. After setting the molded article 1, the robot 21 returns to the original position.

The base 23 of the jack 19 is attached to the gantry 11, and the base 23 has a screw shaft 24 and a guide shaft 2.
5 is provided so as to be movable in the horizontal direction, that is, in the reciprocating direction of the vibrating rod 65.
5 is provided with a block plate 26 at the tip, and the block plate 26 is provided with a block 20. The block 20 is provided with a projection 20a. The projection 20a connects the runner portion 1b of the molded product 1 to the vibration rod 6.
5 restricts the position so as not to shift when being removed from the product part 1a by hitting.

The screw shaft 24 of the jack 19 has a screw 2
7, the screw 27 is provided on the drive shaft 28,
A pulley 29 provided on the drive shaft 28 is connected to a pulley 33 of an output shaft 32 of a motor 31 via a belt 30, and by rotating the motor 31 forward and reverse, the screw shaft 24 is rotated.
Is moved horizontally. This screw shaft 2
4 moves in the horizontal direction, thereby changing the position of the block 20 of the block plate 26 fixed to the screw shaft 24, and the block 20 is automatically adjusted to a predetermined position according to the molded article 1. In response, the block 18 also moves in the reciprocating direction of the vibration rod 65.

As a result, the runner portion 1b is struck shortly before the maximum stroke of the vibrating rod 65, and the striking stroke of the striking mechanism 13 can be always kept in an optimum state, thereby improving the striking efficiency. Can be improved.

Therefore, when working on molded articles 1 having different shapes, at least one of the gripping mechanism 12 and the cylinder 64 is connected to the removing device main body X with respect to the vibration rod 6.
By moving the vibrating rod 65 in the reciprocating direction of 5, the vibrating rod 65 can hit the runner portion 1b slightly before its maximum stroke. As described above, the position of the gripping mechanism 12 or the cylinder 64 is adjusted so that the distance between the impact position of the runner portion 1b and the cylinder 64 is constant regardless of the product shape, and the impact efficiency can be improved. Has become.

Each of the striking mechanisms 13 arranged on both sides of the gripping mechanism 12 has the same configuration, and the striking mechanism 13 is fixed to a mounting base 34. The respective impact mechanisms 13 are used simultaneously when there are a plurality of runner parts per product. The mounting base 34 is provided movably in the vertical direction along the groove 35 a of the guide 35, and the mounting base 34 is moved by moving means 36.

The screw shaft 37 of the moving means 36 is
5 is provided in a vertical direction in parallel with the screw shaft 37.
Is connected to a pulley 41 of an output shaft of a motor 40 via a belt 39. Therefore, by rotating the motor 40 in the forward and reverse directions, the belt 3 is rotated.
9, the screw shaft 37 rotates in conjunction therewith, and this screw shaft 3
With the rotation of 7, the mounting base 34 is guided by the guide 35 and moves to a predetermined position.

The mounting base 34 is fixed to the guide 35 at an arbitrary position by fixing means 42.
By fixing the mounting base 34 to the guide 35 by means of 2, the striking mechanism 13 can be accurately moved to a predetermined position.

The housing 43 of the fixing means 42 straddles the groove 35a of the guide 35.
The cylinder 44 is provided with a piston 45, and the piston 45 is adapted to move forward (to the left in FIG. 3) by supplying hydraulic pressure to the cylinder 44. A spring 46 is provided between the housing 43 and the piston 45. The spring 46 urges the piston 45 in the backward direction. The tip of the piston 45 projects from the housing 43, and the tip of the piston 45 comes into contact with the head of a bolt 48 screwed to the mounting base 34 via a spacer 47.

Normally, no hydraulic pressure is supplied to the cylinder 44 of the housing 43 of the fixing means 42. In this state, the piston 45 is retracted by the spring 46,
Therefore, a force for pressing the housing 43 against the guide 35 does not act. Therefore, in this state, the mounting base 34 is movable with respect to the guide 35.

On the other hand, when the mounting base 34 is fixed to the guide 35, when hydraulic pressure is supplied to the cylinder 44 of the housing 43 of the fixing means 42, the piston 45 moves forward against the spring 46. 3
The pressing force acts on 5, whereby the mounting base 34 is fixed to the guide 35.

The guide 35 is provided so as to be movable along a rail 49 provided in a horizontal direction with respect to the base 10, and the guide 35 is moved by moving means 50. The screw shaft 51 of the moving means 50 is provided in parallel with the rail 49, and a pulley 52 provided at an end of the screw shaft 51 is connected to a motor 5 via a belt 53.
4 is connected to a pulley 55 provided on the output shaft.
For this reason, the screw shaft 51 rotates in conjunction with the rotation of the motor 54 through the belt 53 via the forward and reverse rotations, and the rotation of the screw shaft 51 guides the guide 35 to the rail 49 and moves to a predetermined position.

The guide 35 is fixed to the rail 49 at an arbitrary position by a fixing means 56, a housing 57 of the fixing means 56 is fixed to the guide 35, and a cylinder 59 of the housing 57 is provided with a piston 59, The piston 59 moves forward (downward in FIG. 3) by supplying hydraulic pressure to the cylinder 58. A spring 60 is provided between the housing 57 and the piston 59, and the spring 60 urges the piston 59 in the backward direction. The tip of the piston 59 is the housing 5
7, and the tip end thereof comes into contact with the head of a bolt 63 screwed to the holding slider 62 via the spacer 61.

Normally, no hydraulic pressure is supplied to the cylinder 58 of the housing 57 of the fixing means 56. In this state, the piston 59 is retracted by the spring 60,
Therefore, a force for pressing the housing 57 against the guide 35 does not act. Therefore, in this state, the guide 35 can move in the horizontal direction.

On the other hand, when the guide 35 is fixed to the rail 49, the cylinder 5 of the housing 57 of the fixing means 56 is fixed.
8 is supplied with hydraulic pressure, the piston 59
, A force for pressing the housing 57 against the rail 49 acts, and the guide 35 is fixed to the rail 49.

A pneumatic striking mechanism 13 is supported on a mounting base 34 mounted on the guide 35. The impact mechanism 13 includes a cylinder 64 and a vibrating rod 65, and the cylinder 64 is mounted on the mounting base 34 so that its axis extends in the horizontal direction. The vibrating rod 65 protrudes from the tip of the cylinder 64, and reciprocates in the horizontal direction by supplying air pressure from the air supply unit 66 to the cylinder 64. A pair of silencers 67 are attached to the cylinder 64, and exhaust air is released from the silencer 67 to the atmosphere to reduce exhaust noise.

A cap 68 is provided at the tip of the vibrating rod 65, and the cap 68 is formed of metal. By providing the cap 68 at the tip of the vibrating rod 65 in this manner, the impact force is improved as compared with the case where the vibrating rod 65 directly strikes the runner 1b.

A hole 68a is formed in the center of the cap 68 in a direction perpendicular to the axial direction.
The tip of the vibration rod 65 is located in the hole 68a in a state in which 8 is inserted into the tip of the vibration rod 65. For this reason, the cap 68 is consumed by the impact, but the cap 6
For example, by inserting a wedge 70 into the hole 68a of
The cap 68 easily comes off the vibrating rod 65 and can be easily replaced with another new one.

A cylinder 71 is provided on the guide 35 near and parallel to the striking mechanism 13, and a rod 72 is provided on the cylinder 71 with a vibrating rod 65 of the striking mechanism 13.
It is provided so as to be able to expand and contract in the same direction. Further, the rod 72 is connected via a connecting plate 73, and by extending the rod 72, the cap 68 is moved rightward in FIG. 4 via the connecting plate 73, and the striking rod 65 is extended and contracted in conjunction with it.

The runner part 1 is moved by reciprocating the vibrating rod 65.
When hitting b, the gate 1c breaks and the product part 1a falls. After that, the rod 17 is retracted so that the runner 1
b is removed, but the protrusion 20a is provided on the block 20, so that the runner portion 1b remains on the block 20 side with the protrusion 20a inserted into the runner portion 16. Here, the striking rod 65 is extended so that the runner portion 1b is
By moving to the right with
The runner portion 1b fixed to Oa is peeled off and removed.

The cylinder 71 and the rod 72 are provided close to the striking mechanism 13, and the direction of expansion and contraction of the rod 72 is the same as the direction of expansion and contraction of the striking rod 65 of the striking mechanism 13. It is easier to secure.

Further, since the vibrating rod 65 is extended in conjunction with the extension of the rod 72 of the cylinder 71, the vibrating rod 65 is moved forward in conjunction with the extension of the rod 72 at the time of starting. The initial position of 65 is set, and the responsiveness of the vibrating rod 65 at the time of starting is improved.

With the above configuration, the apparatus for removing a runner portion of a molded product has the holding means 14 of the gripping mechanism 12.
And the jack 19 hold the runner portion 1b at a predetermined position so that the molded product 1 cantilevered.

The striking mechanism 13 is moved to the position of the runner portion 1b. First, the guide 35 is moved in the horizontal direction along the rail 49 by the operation of the moving means 50, and the guide 35 is moved by the operation of the fixing means 56. It is fixed to the rail 49 to perform horizontal positioning. Next, the mounting base 34 for fixing the striking mechanism 13 by the operation of the moving means 36 is connected to the guide 3.
5 to a predetermined position, where the fixing means 4
2, the mounting base 34 is fixed to the guide 35, and the striking mechanism 13 is moved to the position of the runner portion 1b. As described above, the striking mechanism 13 is moved in the plane of FIG. 1 by the movement of both the guide 35 and the mounting base 34, thereby coping with the difference in shape depending on the product.

When hit by the operation of the hitting mechanism 13 fixed in this way, the runner 1b and the heavy product 1
a vibrates at a different cycle and the load due to the impact concentrates on the portion 1c where the runner portion 1b is connected to the product portion 1a, and is easily broken and separated from this portion 1c, thus separating the product portion 1a from the product portion 1a. The runner part 1b is removed.

At this time, the mounting base 34 of the striking mechanism 13
Is fixed to the guide 35 by the fixing means 42, and furthermore, the guide 35 is fixed to the rail 49 by the fixing means 56, so that the vibration or impact due to the operation of the striking mechanism 13 moves the striking mechanism 13 to a predetermined position. The transmission to the means 36 and 50 is eliminated, and no operation error occurs due to the vibration or impact, and the striking mechanism 13 can be accurately moved to a predetermined position. Therefore, the position at which the runner portion 1b of the molded product 1 is hit does not change, and the runner portion 1b can be reliably removed from the product portion 1a of the molded product 1, or the hitting efficiency is improved.

The moving means 36 and 50 are connected to the motor 4
The structure is not limited to the structure in which the screw shafts 37 and 51 are rotated and moved at 0 and 54, but may be a structure where the mounting base 34 and the guide 35 are moved directly by a fluid mechanism such as hydraulic pressure or pneumatic pressure.

FIG. 5 is a sectional view of the tip of a vibrating rod of a striking mechanism according to another embodiment. Vibrating rod 6 of impact mechanism 13
5 is provided with a cap 80 at the tip thereof, and a recess 80a is formed at the tip of the cap 80.
The convex portion 81a of the contact portion 81 made of Teflon is inserted into the concave portion 80a, and the convex portion 81a of the contact portion 81 is detachably connected to the tip of the cap 80 by a connecting pin 82. In this way, by forming the abutment portion 81 with Teflon, the impact sound can be easily reduced.

Similarly, a hole 80b is formed in the cap 80, and a notch 80c communicating from the hole 80b to the recess 80a is formed. A wedge 83 is formed between the hole 80b and the notch 80c. By inserting the cap 80, the cap 80 can be easily removed from the vibration rod 65.

[0046]

As described above, according to the present invention, at least one of the gripping mechanism and the cylinder supporting the reciprocatingly movable vibrating rod is moved in the reciprocating direction of the vibrating rod with respect to the removing device main body and at an arbitrary position. Because it is configured to be fixable, even when removing the runner part from products of different shapes, the striking position of the runner part is moved by moving at least one of the gripping mechanism or the cylinder so that the interval with the cylinder is optimized. Since the runner portion can be hit at a position where the vibrating rod exerts the highest hitting force, the runner portion can be reliably removed from the product part of the molded product, or the hitting efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a front view of an apparatus for removing a runner portion of a molded product.

FIG. 2 is a view taken in the direction of arrow A in FIG. 1;

FIG. 3 is an enlarged view of a part of FIG. 1;

FIG. 4 is a view taken in the direction of arrow B in FIG. 3;

FIG. 5 is a sectional view of a distal end portion of a vibrating rod of a striking mechanism according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Molded product 1a Product part 1b Runner part 12 Gripping mechanism 13 Hitting mechanism 34 Mounting base 35 Guide 42 Fixing means

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-133561 (JP, A) JP-A-62-81262 (JP, A) JP-A-59-209471 (JP, A) 467 (JP, A) JP-A-4-81260 (JP, A) JP-A-50-154353 (JP, A) JP-A-60-72661 (JP, A) JP-A-5-5263 (JP, U) Shokai 61-77159 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B22D 31/00 B29C 37/02

Claims (1)

(57) [Claims] 1. A molded product taken out of a molded 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 molten material, and the molded product is placed in a cantilevered state. A gripping mechanism that grips the runner portion so as to cause the runner portion to reciprocate and support a vibrating rod that reciprocates and hits the runner portion. In the runner part removing device for a molded article capable of removing the workpiece, at least one of the gripping mechanism and the cylinder is configured to be movable in the reciprocating direction of the vibrating rod and fixed at an arbitrary position with respect to the removing device main body. An apparatus for removing a runner portion of a molded product, characterized in that: