JPH0630868B2 - Equipment for cutting the solidified gate of resin molding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a device for cutting a gate solidified product which is solidified at a gate portion of a mold in a synthetic resin molding process and attached to a synthetic resin molded body. is there.

(Prior Art) Conventionally, in the injection molding method or the like, a synthetic resin material is injected and molded in a mold. At this time, the molten synthetic resin material is injected into the mold through an injection passage called a gate.

When the injection is completed and the synthetic resin material in the molding die is solidified into a resin molding, the resin molding is taken out of the mold. At that time, the synthetic resin material of the gate portion is similarly solidified and comes out of the mold together with the molded body as an accessory to the resin molded body (hereinafter referred to as a gate solidified product).

This will be described below by taking as an example the case of molding the exterior material 32 of the steering wheel 31 of an automobile as shown in FIGS. 7 and 8.

The core metal 33 is set as an insert in a molding die, and a synthetic resin material, for example, polyurethane is molded in the rim (RIM) to be solidified in the die, and the steering wheel 31 is taken out from the die. . At this time, the flattened solidified portion 34, that is, the gate solidified material is formed, and burrs 35 are generated on the mold-cracking surface or the like, and these are attached to the exterior material 32 and taken out.

This gate solidified material 34 is naturally the steering wheel 31.
It is not necessary for us and must be removed.

Therefore, conventionally, an operator manually cuts and removes the gate solidified material 34 by using a blade.

(Problems to be solved by the invention) However, in the method of manually removing the gate solidified material 34, there is a possibility that the removed marks may be difficult to clean due to excessive cutting or uncut portions. There is a problem in that even up to 32 may be cut, the appearance of the molded body is difficult to improve, and the work of cutting the gate solidified product is low.

Then, the present inventor has completed the present invention as a result of earnest research to develop an apparatus capable of cutting and removing the gate solidified product of the synthetic resin molded body. Therefore, an object of the first invention is to provide a device for cutting and removing the gate solidified material of the synthetic resin molded body, and an object of the second invention is to more reliably cut and remove the gate solidified material of the synthetic resin molded body. It is in the provision of equipment that can.

Configuration of the Invention (Means for Solving the Problems) The first aspect of the present invention is a support member movably provided in the vicinity of a resin-molded body support base, and a support member that is separated from and the same as the support member. Pair 2 rotatably supported on a plane
A plurality of copying rollers, and a fixed blade provided so that the cutting edge between the copying rollers with respect to the support member penetrates through a plane in which both the copying rollers rotate and faces the tangential direction of both the copying rollers, The gist is that the root portion of the gate solidified material in the resin molded body is cut by the fixed blade in accordance with the rolling on the surface of the resin molded body by the two copying rollers.

Further, the second aspect of the present invention is to provide a support member movably provided near the resin molded body support and a pair of support members which are spaced from each other and rotatably supported on the same plane. The two copying rollers, a fixed blade provided between the copying rollers with respect to the support member so that the cutting edge penetrates through the plane in which the copying rollers rotate and faces the tangential direction of the copying rollers; Gripping means located near the molded body support and capable of gripping the end of the gate solidified material in the resin molded body, and the edge by the gripping means as the two copying rollers roll on the surface of the resin molded body. The gist is that the root portion of the gate solidified product whose portion is gripped is cut by the fixed blade.

(Operation) In the first aspect of the present invention, after moving the supporting member to bring both the copying rollers into contact with the surface of the resin molded body, the supporting member is moved so as to roll on the surface of the resin molded body. To move. Then, the blade edge of the fixed blade located between the two copying rollers cuts the gate solidified material according to the surface condition of the resin molded body.

In the second invention, in addition to the operation of the first invention, the end of the gate solidified product is grasped, so that the gate solidified product can be cut in a pulled state.

(Embodiment) A first embodiment in which an embodiment of the first invention of the present invention is embodied in a device for cutting a gate solidified material of an exterior material of a steering wheel (hereinafter referred to as a ring) of a vehicle will be described with reference to FIGS. To do. In this embodiment, a cutting means A as a cutting device is provided at a position above and outside a ring fixing base (not shown) as a resin molded body support.

As shown in FIG. 1, a sliding member 7 is fitted in a vertical rail 6 that is provided so as to be movable in the two-dimensional directions of arrows X and Y, and the sliding member 7 is attached with the arrow Z. An attachment portion 5 of an air cylinder (not shown) for moving up and down in the direction shown is provided. The movement of the rail 6 in the X and Y directions and the movement of the sliding member 7 in the Z direction are performed by a robot and an air cylinder (neither is shown), and their drive control is performed by a computer (not shown).

A base 8 is fixed to the sliding member 7, and a U-shaped support member 10 is pivotally supported on a fulcrum shaft 9 provided at the center of the tip of the base 8, and the support member 10 is the same as the above-described one. It is rotatable about the fulcrum shaft 9.

Hooks 14, 1 are provided on the side surface of the base 8 and the side surface of the support member 10.
5 is attached, and the elastic body 16 is locked to the hooks 14 and 15 in an extended state. Therefore, unless an external force is applied to the support member 10, the support member 10 is made of the elastic body 1
It is pulled by 6 and is rotated to one side of the base 8.

The support member 10 is formed with two branch portions 10a and 10b, which are inclined so as to point slightly downward. Then, shafts 13a and 13b are attached to their tip portions, and the roller 3 is attached to these shafts 13a and 13b.
a and 3b are rotatably provided.

A blade gripping member 11 is provided between the two branch portions 10a and 10b.
Is fixed thereto, and a blade 4 as a fixed blade is fixed thereto by a screw 12 with its cutting edge 4a directed in the tangential direction of the rollers 3a and 3b as shown in FIGS. The blade 4 may be directly attached to the support member 10.

The blade 4 extends downward so that the inclined blade edge 4a penetrates the plane in which the rollers 3a and 3b rotate as shown in FIG. Therefore, when the blade 4 is moved in the lateral direction, the gate solidified product hitting it is cut. Further, the blade 4 is double-edged so that the cutting direction is stable.

In addition, the mounting direction of the blade 4 viewed from its side is the third
As shown in the figure, the shafts 13a and 13b are different from the shaft centers of the rollers 3a and 3b and are not parallel to each other. This is because the portion of the ring 21 where the rollers 3a and 3b come into contact with each other and follow the blade 4 is different from the portion where the blade 4 comes into contact, that is, the cut portion of the gate solidified material.

Next, the operation of this embodiment configured as described above
The effect will be described.

First, the cutting means A shown in FIG. 1 is replaced with the ring 2 shown in FIG.
Move closer to 1. The cutting means A is moved by operating the robot to move the rail 6 in the X and Y directions, or after moving the rail 6, the sliding member 7 is moved in the Z direction.

At this time, as shown in FIG. 4, first, from the blade 4,
The cutting means A is moved so that the roller 3a which is farther away is brought into contact with the outer peripheral side of the ring 21. If the 6th
As shown in the figure, when the roller 3b closer to the blade 4 is first brought into contact with the ring 21, the direction of the blade 4 is changed to the ring 2.
Since it deviates from the tangential direction of 1, the burr 20 and the gate solidified substance easily bite when the blade 4 starts moving.

Then, if the cutting means A is moved toward the ring 21 as it is, the two rollers 3a and 3b are brought into contact with the curved outer peripheral side of the ring 21, as shown in FIG.

Further, when the rollers 3a and 3b are brought into contact with the ring 21, the edge portions of the rollers 3a and 3b are brought into contact with the root portion 2a of the gate solidified material 2 in the ring 21 as shown in FIG.

When the cutting means A is moved toward the gate solidified material 2 after this, the rollers 3a and 3b move along the base portion 2a of the gate solidified material 2. Meanwhile, the support member 10
Is gradually rotated around the fulcrum shaft 9 of the base 8 to the side where the elastic body 16 is not attached. The blade 4 attached to the support member 10 via the blade gripping member 11 also moves with the movement of the rollers 3a and 3b.
The rollers 3a and 3b cut the gate solidified material 2 according to the surface condition of the outer peripheral side of the ring 21. Since the blade 4 always faces the tangential direction of the ring 21, the blade 4 does not cut into the exterior material 22.

Moreover, since the time required for the cutting is short, the working efficiency is improved by using this device.

Normally, the outer peripheral surface of the ring 21 is formed beautifully, so the gate solidified material 2 cut along the surface is formed.
Marks will be beautiful.

When the cutting means A is separated from the ring 21 when the cutting of the gate solidified material 2 is completed, the elastic body 16 acts and the supporting member 10 rotates about the fulcrum shaft 9 as shown in FIG. Ready to enter the cutting cycle.

Next, an embodiment of the second invention will be described with reference to FIG.

In addition to the cutting means A, the device of this embodiment further includes a second
As shown in the figure, a gripping means B for gripping the end 2b of the gate solidified material 2 formed on the exterior material 22 of the ring 21 is provided.

The structure of the cutting means A is the same as that of the first embodiment, and its action and effect are also the same as those of the first embodiment.

The gripping means B is provided on the frame 17 and a frame 17 disposed outside the ring fixing base, a fixing bar 18 horizontally attached to the frame 17 so that the gate solidified material 2 can be placed on the frame 17. The rotation bar 19 is rotatably supported about the fulcrum shaft 24.
2 is rotated to a fixed bar 18 in FIG. 2 so that the end 2b of the gate solidified material 2 is interposed between the bars 18 and 19.
Can be grasped.

When the gripping means B is to grip the end 2b of the gate solidified material 2, the ring 21 is placed on a ring fixing base (not shown) as shown in FIG. Fix the ring 21 so that it is on top. And
The rotary bar 19 of the gripping means B is rotated to rotate the gate solidified material 2
The end portion 2b of 2 is gripped by the two bars 18 and 19.

After the end portion 2b of the gate solidified material 2 is gripped in this way, the gate solidified material 2 is then subjected to the same operation as in the first embodiment.
Enter the cutting operation.

In this way, if the end portion 2b of the gate solidified material 2 is grasped before using the cutting means A, the ring 21 and the grasping means B can be grasped.
Since the gate solidified material 2 is pulled by the above, the cutting of the gate solidified material 2 is easily and surely achieved by inserting the blade 4 there.

This gripping means B works particularly effectively when the gate solidified material 2 is a soft material such as urethane resin. That is, without the gripping means B, when the gate solidified material 2 is cut, a combined force of a force from the tangential direction from the blade 4 and a downward force due to the weight of the gate solidified material 2 acts on the cut portion, so that the cutting ends. In this case, since the gate solidified material 2 is a soft material, the cut portion is in a hanging state, the downward force due to its own weight is predominant, and it becomes impossible to reliably cut in the tangential direction. Therefore, there is a possibility that uncut residue may occur.

Although the embodiments of the present invention have been specifically described above, the present invention is not limited to the embodiments and can be implemented in the following modes, for example.

(1) The cutting means A can be used by hand to cut the gate solidified material 2 without using a robot.

(2) The apparatus of the present invention can be applied to any resin molded body 1 having a flat shape and having a certain width, that is, a molded body having a gate solidified material 2 molded by a so-called film gate. In particular, it can be advantageously applied to the cutting of the gate solidified material 2 of a molded body having a curved surface.

Effects of the Invention The following excellent effects are exhibited by using the device of the present invention.

In the first invention, since the gate solidified material is cut in accordance with the surface shape of the resin molded body on which the pair of two copying rollers roll, the trace of cutting of the gate solidified material becomes clean and the product quality is improved. Even if the support member is moved while tilting with respect to the resin molded body, the fixed blade edge will not cut into the resin molded body unless both copying rollers come into contact with the surface of the resin molded body. There is no danger of damaging the product as it will not be inserted.

Further, since the time required for cutting the gate solidified product is short, the work efficiency is improved as compared with the conventional work.

In the second invention, the end of the gate solidified product is grasped and the gate solidified product is cut in a state in which the gate solidified product is pulled, so that the cutting is easy and reliable, and there is no possibility of uncut residue. .

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention, FIG. 2 is a perspective view of a second embodiment, FIG. 3 is a sectional view showing a state in which a blade is in contact with a steering wheel, and FIG. 4 is a steering wheel. Explanatory drawing which shows the state which a cutting means contacts first, 5th
FIG. 7 is an explanatory view showing a state in which the cutting means is in full contact with the steering wheel, FIG. 6 is an explanatory view showing a state in which the cutting means is in contact with the steering wheel in another mode, and FIG. 7 is a front view of the steering wheel. FIG. 8 shows a sectional view taken along the line VIII-VIII in FIG. Resin molding 1, gate solidified material 2, root portion 2a, copying rollers 3a, 3b, blade 4 as fixed blade, blade tip 4a,
Support member 10.

Claims (2)

[Claims] 1. A support member (10) provided so as to be movable near a resin molded body support base, and the support member (10).
A pair of two copying rollers (3a, 3b) spaced apart from each other and rotatably supported on the same plane, and both copying rollers (3a, 3b) with respect to the support member (10).
The cutting edge (4a) between the two copying rollers (3a, 3
b) Penetrating through the rotating plane of both rollers and both copying rollers (3
a, 3b) and a fixed blade (4) provided so as to face the tangential direction of the resin molded body, the resin molded body being rolled on the surface of the resin molded body (1) by the copying rollers (3a, 3b). The root portion (2) of the solidified gate (2) in (1)
A cutting device for a resin molded body gate solidified product, characterized in that a) is cut by the fixed blade (4). 2. A support member (10) movably provided in the vicinity of a resin molding support base, and the support member (10).
A pair of two copying rollers (3a, 3b) spaced apart from each other and rotatably supported on the same plane, and both copying rollers (3a, 3b) with respect to the support member (10).
The cutting edge (4a) between the two copying rollers (3a, 3
b) Penetrating through the rotating plane of both rollers and both copying rollers (3
a, 3b) fixed blades (4) provided so as to face the tangential direction, and an end portion (2) of the gate solidified product (2) in the resin molded body (1) located near the resin molded body support base. Two
b) and a gripping means (B) capable of gripping the end portion (2b) by the gripping means (B) along with rolling on the surface of the resin molded body (1) by the copying rollers (3a, 3b). A cutting device for a resin molded body gate solidified product, which is configured to cut the root portion (2a) of the gate solidified product (2) gripped by the fixed blade (4).