JP3002018B2 - 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 method for removing a runner portion from a product portion of an intermediate molded product after removing the intermediate molded product from a mold cavity after molding by an injection molding machine, for example, during casting. It relates to a removing device.

[0002]

2. Description of the Related Art An intermediate molded product taken out of a mold cavity after molding by the injection molding machine 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. .

[0003] A product can be obtained by removing the runner portion from the product portion. Conventionally, this removal is performed by first fixing the product portion so that the runner portion becomes cantilevered, It is performed by hitting the runner portion with a hammer, thereby breaking a gate portion where the runner portion is connected to the product portion.

[0004]

By the way, in the above-mentioned conventional structure, the product portion is fixed when the runner portion is removed. In this case, the product is not damaged by the jig. It is required to consider. Therefore, the fixing operation is complicated, that is, the operation of removing the runner portion is complicated.

[0005] Therefore, the product section is made to have a cantilever shape.
Is provided with a striking means for gripping the runner portion.
By hitting the runner section by means,
The product part is separated from the runner part of
It is possible to remove the runner part from the part
It is.

According to the above, the removal of the runner portion
Grips the runner part and attaches the runner part
Because it is made by hitting, the above product part is gripped or hit
Scratches are prevented and therefore such runners
The removal of the parts will not damage the product part.
It does not need to be considered, and the removal work
Becomes easier.

However, in the case described above, the runner
Noise due to the impact of the part reduces the working environment of the removal work
May be caused.

[0008]

SUMMARY OF THE INVENTION The present invention has been made by focusing on the above situation, in the injection molding or the like, from the product portion of the intermediate product, to allow removal of the runner by a simple work And if you do this
Another object of the present invention is to prevent the working environment from being reduced due to noise .

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, a feature of the present invention is that a mold cavity or the like is used.
The intermediate molded article 1 taken out of the molding section is
Runner connected to the product section 4 of
And the runner part 2 from the product part 4.
This is a runner removal device for molded products that can remove
hand,

[0010] The gripping means 9 for gripping the <br/> runner 2 so as to the product portion 4 in the cantilever shape, ibid runner
2 and a striking means 19 for striking a

The striking means 19 can be vibrated in the axial direction.
Vibrating rod 34 and the axial direction of the vibrating rod 34
And a cap 40 externally fitted to one end.
And pressurize the pump 40 to the runner part 2
With the cap 40 pressed against the runner part 2,
The vibration of the vibration rod 34 is applied to the runner through the cap 40.
-It is provided to the part 2 .

[0012] Incidentally, the above runner 2, for example, in the casting sprue, and includes all the equivalent of the path of the molten metal leading to products from the sprue, in the resin molding stamp portion 14 (resin Pool) and this stamp part
It is assumed that everything including the path of the molten resin from 14 to the product section 4 is included. In addition, the runner part 2
It also includes those corresponding to so-called air vents 48 that prevent air from remaining in the mold when molten metal or molten resin is injected into the mold.

[0013]

[Operation] The operation of the above configuration is as follows.

When removing the runner section 2 from the product section 4 of the intermediate molded article 1, first, the runner section 2 is gripped by the gripping means 9 so as to make the product section 4 cantilevered. Next, the runner 2 is hit by the hitting means 19.

Then, the runner 2 and the heavy product 4 vibrate at different periods, and the load due to the impact concentrates on the gate 3 where the runner 2 is connected to the product 4. This gate portion 3 is easily broken. Thus, the product part 4 is separated from the runner part 2, that is, the runner part 2 is removed from the product part 4.

In the above case, since the runner portion 2 is removed by gripping the runner portion 2 and hitting the runner portion 2, the product portion 4 is prevented from being scratched by the gripping or hitting. Is done.

The hitting means 19 can vibrate in the axial direction.
A vibrating rod 34 and an axis of the vibrating rod 34
And a cap 40 fitted externally to one end in the direction.
When the cap 40 can be pressed against the runner part 2,
In a state where the cap 40 is pressed against the runner portion 2
Thus, the vibration of the vibrating rod 34 passes through the cap 40.
It is provided to the runner section 2.

That is, the vibration of the vibrating rod 34 is
The cap 40 externally fitted to one end of the vibrating rod 34
To the runner part 2 against which the cap 40 is pressed.
As a result, one end of the vibrating rod 34
Compared to hitting the runner part body 18 directly,
The cap 40 is externally fitted to one end of the runner part 2,
The cap 40 is in pressure contact with the runner portion 2
Minutes, the blow sound is kept low.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 4, reference numeral 1 in the drawings denotes an intermediate molded product made of aluminum, 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 is formed along the path of a molten aluminum material as a molten material in the mold. Corresponding. 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. The runner part removing device 6 includes a base 7 and a gantry 8 erected on the base 7. For convenience of explanation, FIG.
The following description is based on the assumption that the direction indicated by the middle arrow Fr is forward.

The runner removing device 6 has a gripping means 9 for gripping the runner 2 so as to make the product 4 cantilever. The gripping means 9 has an abutment portion 10 protruding downward from the upper portion of the gantry 8.
It is automatically fed to a predetermined position in the left, right, up and down directions. Further, an air-hydro type holding cylinder 11 is provided corresponding to the above-mentioned contact portion 10. The presser cylinder 11 includes a cylinder tube 12 whose axis extends in the front-rear direction and is attached to the gantry 8, and a piston rod 13 that can move back and forth from the rear end of the cylinder tube 12. I have.

When the piston rod 13 is made to protrude rearward, the stamp part 14 constituting the upper end of the runner part 2 moves between the rear end of the piston rod 13 and the abutment part 10. The intermediate molded product 1 is thereby fixed to the gantry 8 side. On the other hand, if the piston rod 13 is retracted, the grip is released.

In the above case, there is provided a robot 15 for transporting the intermediate molded product 1 taken out of the mold cavity and positioning the stamp portion 14 between the abutment portion 10 and the piston rod 13. The stamp unit 14 has a substantially circular shape when viewed from the front, and the robot 15 has a hand 16 that detachably holds the stamp unit 14 from above and below. Then, the intermediate molded product 1 can be moved to a desired position by this gripping.

A striking means 19 is provided for striking the main body 18 of the runner 2 from the stamp 14 to the gate 3 when the stamp 14 is grasped by the grasping means 9.

The hitting means 19 includes a rail 20 extending horizontally in the left-right direction on the upper part of the gantry 8 and a slide guide 20.
a. These rails 20 and slide guide 2
0a has a sliding plate 21 guided left and right by these.
A screw jack 22 is provided for slidingly moving the sliding plate 21 to an arbitrary position on the left and right by operating a handle. The sliding plate 21 is formed with a pair of front and rear long holes 23 long in the left and right directions.
3 and a fastening means 24 penetrating the gantry 8. By operating the fastening means 24, the sliding plate 21 can be fixed to the gantry 8 at an arbitrary position on the left and right.

The sliding plate 21 is provided with a bracket plate 26 projecting downward, and the bracket plate 26 is provided with a rail 25 extending vertically. The bracket plate 26 has a pair of front and rear long holes 27, 27 extending vertically.
Are formed, and fastening means 28 penetrating through each of the long holes 27 are formed.
Thus, the support 29 is fixed to the bracket plate 26. When the fastening means 28 is loosened, the support table 29 is guided by the rail 25 so as to be slidable up and down. In this state, a screw jack 30 for allowing the support table 29 to move up and down by operating a handle is provided. Is provided. The operation of the screw jack 30 and the fastening means 28 allows the support base 29 to be fixed to the bracket plate 26 at an arbitrary vertical position.

The support table 29 supports a pneumatic vibrator 32. This vibrator 32 is a cylinder tube 3
3 and a vibrating rod 34, and a cylinder tube 3
Reference numeral 3 denotes an axis extending in the front-rear direction and attached to the support base 29. The vibrating rod 34 protrudes slidably forward from the front end of the cylinder tube 33, and vibrates back and forth in the axial direction by supplying pressurized air to the cylinder tube 33. .

A pair of upper and lower pneumatic cylinders 36 are supported by a support plate 35 at the front of the support table 29. Each of these pneumatic cylinders 36 is composed of a cylinder tube 37 attached to the support plate 35 and a piston rod 38 which can move forward and backward from the front end of the cylinder tube 37, and upper and lower piston rods 38, 38 Are connected to each other by a connecting plate 39.

A cap 40 is detachably screwed to the connecting plate 39 with bolts 41, and the cap 4
0 protrudes forward. The cap 4
0 is removably fitted to the front end , which is one end in the axial direction of the vibrating rod 34, and the cap 40 and the vibrating rod 34
A spacer 42 is interposed between the spacer 42 and the front end.

If the vibrator 32 is moved to predetermined positions in the left, right, up and down directions by moving the slide plate 21 and the support table 29 and the pneumatic cylinders 36 are extended, the front end of the cap 40 Can be pressed against the runner portion 2. Then, when the vibrator 32 is driven in a state where the cap 40 is pressed against the runner portion main body 18, the vibration of the vibrating rod 34 is given to the cap 40 via the spacer 42.
The vibration of the runner part 2 which pressed the cap 40
And the runner portion main body 18 is hit.

[0033] In the above case, the vibration of the vibrating rod 34, this
Of the cap 4 externally fitted to one end of the vibrating rod 34 of FIG.
0 and the cap 40
The vibrating rod 34 is provided directly to the runner portion main body 18 against which the pressure rod 40 is pressed.
Compared to hitting a runner body 18, this run
The cap 40 is externally fitted to one end of the
And the cap 40 is connected to the runner portion main body 18.
As a result, the impact sound is suppressed low, that is, noise is prevented. Further, the cap 40 is worn by hitting, but can be replaced with another new one by operating the bolt 41.

In FIG. 3, when the runner portion main body 18 is hit as described above, the gate portion 3 is a portion having a sufficiently smaller cross-sectional area than the runner portion main body 18 and the product portion 4 as described above. The bending of the gate portion 3 causes the product portion 4 to rotate back and forth (arrow A in FIG. 3). That is, the gate portion 3 receives an alternating load, and the runner portion 2 and the heavy product portion 4 vibrate at different periods, so that the load due to the impact concentrates on the gate portion 3 and the gate portion 3 3 easily breaks due to fatigue fracture. Therefore, product part 4
Is separated from the runner part 2 (shown by a two-dot chain line in FIG. 3),
That is, the runner part 2 is removed from the product part 4. After the removal, the supply of the pressurized air to the cylinder tube 33 is stopped, and the vibration of the vibrating rod 34 is stopped.

Below the hitting means 19, a chute 4
3 is provided, and the separated product part 4 is conveyed to the next step through the chute 43.

On the other hand, the remaining runner portion 2 is gripped by the hand 16 of the robot 15 and the piston rod 13 of the holding cylinder 11 moves forward, so that the gripping by the piston rod 13 and the abutment portion 10 is performed. It is released.
Further, the vibrating rod 34 moves backward together with the cap 40 due to the contraction operation of the pneumatic cylinders 36, 36 (FIG.
Thereafter, the runner unit 2 is transported to a predetermined position by the robot 15 described above.

The vibration of the vibrating rod 34 is performed by the supply of pressurized air to the cylinder tube 33 as described above. However, due to the characteristics of the pneumatic vibrator 32, generally, In order to start the vibration from the state where is stopped, it is necessary to return the vibration rod 34 once to a predetermined position with respect to the cylinder tube 33. In this embodiment, the oscillating rod 34 can be returned to the above-described predetermined position by moving the oscillating rod 34 backward by the contraction operation of the pneumatic cylinders 36, 36. That is, by the operation of each of the pneumatic cylinders 36, 36,
The vibrator 32 can be started without any trouble.

After that, the runner portion removing device 6 returns to the original state shown in FIG. 1, and the above operation is repeated to remove the runner portion 2.

As described above, the vibrator 32 is moved left and right,
The movement to the predetermined upper and lower positions may be performed by an electronically controlled robot. In this case, as shown in FIG. 3, the rear end of the vibrator 32 is slidably abutted so that a reaction force when the vibrator 32 hits the runner portion 2 is not applied to the robot. A backup plate 45 receiving the reaction force is provided.

In the above case, even if the shape of the product part 4 is various, the stamp part 14 is determined to have a certain shape for the convenience of the molding operation. And in the above embodiment,
In the removal operation of the runner part 2, the stamp part 14 having the above shape is gripped, so that the number of types of jigs is smaller than that of gripping the product part 4, and the runner part 2 is removed accordingly. Work becomes easy .

The intermediate molded article 1 may be made of resin. Further, the vibrating rod 34 in the present embodiment moves back and forth and hits the runner portion 2, but may be configured to move up and down. In this case, since the vibrating rod 34 hits in the direction of gravity, the product portion 4 The runner section 2 can be quickly separated from the runner.

The striking by the striking means 19 may be performed by the gate 3 or the stamp 14.

When the air vent 48, which is the runner portion 2, protrudes from the product portion 4, as shown by the phantom line in FIG. It may be removed as in the example.

[0044]

According to the present invention, the mold cavity and the like
The intermediate molded product removed from the molding section is
And a runner section that connects to the
Formed from the product, allowing removal of the runner from this product
A runner part removing device for a molded product,

[0045] includes a gripping means for gripping the La <br/> runner section so as to the product portion in cantilever-like, and a striking means for striking the Id runner.

For this reason, since the runner portion is removed by gripping the runner portion and hitting the runner portion other than the product portion, damage to the product portion due to gripping or hitting may occur. Is prevented.

[0047] Thus, according to the work of removing the runner portion
If, enough not considerations that will not damage the product portion
And than, the minute, the removal operation is simplified.

Further , the impact means can vibrate in the axial direction.
Vibrating rod and one end in the axial direction of the vibrating rod
And a cap fitted to the runner.
Part and press the cap on the runner.
The vibration of the vibrating rod is
So that it can be given to the runner via the cap.
You.

That is, the vibration of the vibrating rod is
From the above cap fitted externally to one end of the rod,
Vibration is applied to the runner part where the
One end of rod hits runner directly with its vibration
Compared to the runner, one end of the runner
Flop is fitted, and pressure contact this cap runner section
The impact sound is kept low.

Therefore, in the operation of removing the runner part,
The noise caused by the impact lowers the work environment for the removal work.
Is prevented.

[Brief description of the drawings]

FIG. 1 is an overall side view.

FIG. 2 is a view taken along line 2-2 of FIG. 1;

FIG. 3 is a partially enlarged partial sectional view of FIG. 1;

FIG. 4 is a partial sectional view taken along line 4-4 of FIG. 1 ;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Intermediate molded product 2 Runner part 3 Gate part 4 Product part 6 Runner part removing device 9 Gripping means 14 Stamp part 18 Runner part main body 19 Hitting means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-81260 (JP, A) JP-A-50-154353 (JP, A) JP-A-60-72661 (JP, A) 88516 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B22D 31/00 B29C 37/02

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 product that enables removal of the molded product, comprising: gripping means for gripping the runner portion so as to make the product portion cantilevered; and hitting means for hitting the runner portion . A vibrating rod in which the impact means is capable of vibrating in the axial direction
And a cap fitted externally to one end of the vibrating rod in the axial direction.
This cap can be pressed against the runner part.
And the cap was pressed against the runner part.
In this state, the vibration of the vibrating rod is
An apparatus for removing a runner portion of a molded product to be applied to the runner portion.