JPH056098Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a gate cutting machine for soft resin that cuts the gate cut portion of an injection molded soft resin molded product.

[Prior art and its problems] Conventionally, when cutting a runner of a molded product made of soft resin at the gate part, an operator would use nippers to cut the runner, so the cut surface of the gate part would be slanted, curved, or deformed. Otherwise, the runner may get caught between the blades, making it impossible to cut or leaving uncut parts, making it impossible to cut reliably and efficiently.

[Purpose of the invention] This invention was made in view of the above-mentioned circumstances, and its purpose is to create a soft material that can reliably and efficiently cut the gate part of the runner of a molded product made of soft resin. The purpose of the present invention is to provide a gate cutting machine for resin.

[Main points of the invention] In order to achieve the above-mentioned object, this invention has a gate part receiving groove for receiving the gate part of a runner of a molded product made of soft resin, and is provided so as to be movable in mutually opposing directions. a pair of gate part receivers, a rotating shaft having threaded portions in opposite directions screwed into each of the gate part receivers, a rotational drive part for rotationally driving the rotating shaft, and a rotational drive part for rotationally driving the rotating shaft; A fixed blade attached to one edge, a movable blade attached to the other edge of the gate receiving groove so as to be movable toward the fixed blade, and a movable blade attached to the rotating shaft and movable when the rotating shaft rotates. It consists of a cam that moves the blade to the fixed blade side,
When the rotating shaft is rotated after the gate portions of the runner are received in the gate portion receiving grooves, both the gate portion receiving bodies move in a direction away from each other, and the movable blade is moved toward the fixed blade side by the cam. The key point is that the gate section of the runner was cut by moving to

[Embodiment] An embodiment of this invention will be described below with reference to FIGS. 1 to 9.

FIG. 1 is a front view of this embodiment, and FIG. 2 is a side view thereof.

1 is a gate cutting machine, and this gate cutting machine 1
is fixed on a base plate 2, and this base plate 2 is attached via a slide unit 3 to a movable device base 4. Note that 2a is a cylinder for ejecting the base plate 2. Further, the device stand 4 has wheels 5 for use in moving it, and also includes a fixture 6 for use in fixing it at a desired position. Furthermore, the conveyor 7 for conveying the cut runners and products is constructed so that it can be installed below the gate cutting machine 1.

FIG. 3 is a perspective view showing the left half of the gate cutting machine 1 divided at the center, FIGS. 7 to 9 are side views of each state of the gate cutting machine 1, and FIG. 6 is a plan view thereof. .

The gate cutting machine 1 has both ends of a rotating shaft 8 supported on a base plate 2, a pair of support plates 9 facing each other that are erected on the base plate 2, and a cam 10 provided on both sides of the rotating shaft 8. The threaded part 11a and this threaded part 11a
The gate part receivers 13a, 13b are integrally attached with nuts 12a, 12b which are screwed into the threaded part 11b whose winding direction is opposite to that of the gate part receivers 13a, 13b. The gate receiving groove 14 is open on the front side in the figure.
is fixed to the inside of the upper edge of the
A fixed blade 15 formed on the cam 10 and a roller 1 on the cam 10.
6a, and a movable blade 16 that slides in the vertical direction via the blade 6a.

In addition, 16b is the gate part receiving body 13a, 1
3b, the cutting edge 16c of the movable blade 16 is directed upward, and its outer surface is formed into a vertical surface 16d, and this vertical surface 16d is almost the same as the vertical surface 15a of the fixed blade 15. It is formed on a plane (with a small gap actually placed between the vertical surfaces 15a and 16d). In addition, 9a is a support plate 9
The gate portion receiving bodies 13a, 13b are erected on the
It is a guide rod that guides you.

Further, as shown in FIG. 2, one end of the rotation shaft 8 is connected to a rotation drive section 18 provided on the base plate 2 via a coupling 17.

Note that 19 is a plate to be detected provided at the shaft end of the rotary drive unit 18, and 20 is a sensor for detecting this plate to be detected 19.

As shown in FIG. 4, the cutting edge 1 of the movable blade 16
6c is 16 in accordance with the shape of the cut gate part.
It may also be formed like c′.

The shape of the cutting edge 16c' will be explained next.

FIG. 5 shows a workpiece 21 as an example. 22 is a molded product, which is cut at the gate portion 23 to remove the runner. Work like this 21
The upright runner 21a is gripped by a take-out machine (not shown) and conveyed to the gate cutting machine 1 described above, but after being placed on the guide plate 14a, the runner 21a is placed on the guide plate 14a and then moved to the stand via the slide unit 3 by the projection of the projection cylinder 20. The board 2 slides and is therefore received in the gate receiving groove 14 such that the gate cut portion 23 is positioned.

In addition, although the cutting edge 16c' is shown in FIG.
This cutting edge 16c' is an example of matching the workpiece 21, and the cutting edge 16c' is located between the horizontal runners 26, 26.
The protrusion 24 of c' is inserted, the cutting edge 16c' and the protrusion 25
is inserted on the outside of both runners 26, 26, and the cutting edge 1
Tip portions 27, 27 of 6c' are arranged to face gate portions 23, 23 of both runners 26, 26.

Therefore, when cutting the gate portion 23 of the workpiece 21 as shown in FIG. 5, the cutting edge 16c shown in FIG. 3 is replaced with a cutting edge 16c'.

Next, the operation of this embodiment will be explained.

The workpiece 21 is taken out from the injection molding machine (not shown) by a takeout machine (not shown) and placed on the guide plate 14a, and the base plate 2 is moved to the second position by the ejection cylinder 2a shown in FIGS. 1 through the slide unit 3 to the position indicated by the broken line (on the conveyor 7).
will be moved.

Next, the workpiece 21 is received by the gate part receiving groove 14 so that the gate part 23 thereof is positioned on the horizontal groove 14 shown in FIG.
As shown in the figure, the runner 26 slightly in front of the gate portion 23 of the workpiece 21 is located between the vertical surfaces 15a and 16d.

Next, when the rotary shaft 8 is rotated by the rotary drive unit 18 via the coupling ring 17, the cam 1
0, the movable blade 16 is moved through the roller 16a.
is raised, and the gate part receiving body 13
a, 13b move outward (in the direction of separation) by the threaded portions 11a, 11b, and the protrusions 24, 25 shown in FIG. While applying this, the gate portion 23 is cut by the tips 27, 27 of the cutting edge 16c'. FIG. 8 shows the state during cutting, and FIG. 9 shows the state after cutting.

At this time, the detected position of the detected plate 19 shown in FIG. 2 is detected by the sensor 20, and the detected signal is sent to the control section of the rotation drive section 18.
The rotation drive unit 18 stops driving the rotation shaft 8, the movable blade 16 stops rising, the rotation of the rotation drive unit 18 becomes reverse rotation, and the movable blade 16 also returns to its original position. .

Further, the cut molded product 22 is sent to the next process by the conveyor 7 provided below the gate cutting machine 1, and the runners 21a and 26 are sent to the next process by the take-out machine 12.

The above-mentioned operation is repeated for the workpieces 21 of the same shape. If the shape of the workpiece to be cut changes, the cutting operation is performed by replacing it with one with a different cutting edge shape.

As explained above, the work 21 is the molded product 2
2, and a runner 26 etc. that connect these, and the cutting edge 16c' is locked to the molded product 22, and the threaded portion 11 of the rotating shaft 8 with different left and right thread directions is formed.
Gate part receiving body 13a, 1 by a, 11b
3b, while moving the pair of cutting edges 16c' away, the gate part 23 is attempted to be cut with the tip 27 of the cutting edge 16c', and the gate part 23 is cut while a tensile force is applied to the runner 26. The cut surface of the gate portion 23 can be reliably cut with high precision and a good appearance.

In addition, since cutting is done automatically, work efficiency can be improved.

[Effects of the invention] As described above in detail, the gate cutting machine for soft resin of this invention has a gate receiving groove for receiving the gate part of the runner of a molded product made of soft resin, and also has A pair of gate part receivers that are movable in opposing directions, a rotating shaft having opposite threaded parts screwed into both gate part receivers, and a rotational drive that rotationally drives this rotating shaft. a fixed blade attached to one edge of the gate part receiving groove, a movable blade attached to the other edge of the gate part receiving groove so as to be movable toward the fixed blade side, and a fixed blade provided on the rotating shaft. When this rotary shaft rotates, the movable blade is moved toward the fixed blade side.The cam is a cam that moves the movable blade toward the fixed blade side, and when the rotary shaft is rotated after the gate portion of the runner is received in the both gate portion receiving grooves, the movable blade is moved toward the fixed blade side. The gate receivers are moved in a direction away from each other, and the movable blade is moved toward the fixed blade side by the cam to cut the gate part of the runner, so that the runner part of the molded product taken out is A tensile force is applied by the two blades moving away from each other through the gate receiving body, and the movable blade moves toward the fixed blade through the cam to cut the gate part. The cut surface can be precisely cut, the appearance is good, and the cut can be made reliably.

In addition, since the cutting is done automatically, there is no chance of cutting errors and work efficiency can be improved.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an overall embodiment of this invention, Fig. 2 is a side view of Fig. 1, and Fig. 3 is a perspective view showing the left side of the gate cutting machine divided into two at the center.
Fig. 4 is a perspective view of a cutting edge section suitable for the workpiece shown in Fig. 5, Fig. 5 is a perspective view showing an example of the workpiece to be cut, Fig. 6 is a plan view of the gate cutting machine, and Fig. 7
The figure is a side view of the gate cutting machine showing the state in which the workpiece has been received, Figure 8 is a side view of the gate cutting machine showing the state in which the workpiece is being cut, and Figure 9 is the side view of the gate cutting machine showing the state in which the workpiece has been cut. It is a diagram. 1... Gate cutting machine, 8... Rotating shaft, 10...
...Cam, 11a, 11b...Threaded part, 13a, 1
3b... Gate part receiving body, 14... Gate part receiving groove (groove), 15... Fixed blade, 16... Movable blade, 18... Rotation drive part, 21a, 26... Runner, 22... Molded product , 23...gate section.

Claims (1)

[Scope of utility model registration request] A pair of gate-receiving bodies each having a gate-receiving groove for receiving the gate of a runner of a molded product made of soft resin and movable in opposite directions; A rotating shaft to which threaded portions in opposite directions are respectively screwed together, a rotational drive unit that rotationally drives the rotating shaft, a fixed blade attached to one edge of the gate receiving groove, and a rotating shaft that rotates the rotating shaft, and a fixed blade attached to one edge of the gate receiving groove. It consists of a movable blade attached to the other edge so as to be movable toward the fixed blade side, and a cam provided on the rotary shaft to move the movable blade toward the fixed blade side when the rotary shaft rotates. When the rotary shaft is rotated after the gate part of the runner is received in the part receiving groove, both the gate part receiving bodies are moved in a direction away from each other, and the movable blade is moved toward the fixed blade side by the cam. A gate cutting machine for soft resin, characterized in that the gate part of a runner is cut by using a runner.