JPS593775Y2 - Equipment for cutting unnecessary parts of molded products made from plastic sheets - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cutting device for cutting unnecessary parts around a molded product made by vacuum forming or heat processing a plastic sheet.

To cut off unnecessary parts around the molded product that occur when vacuum forming or heat processing conventional plastic sheets,
Although the unnecessary parts were manually cut by contacting them with a rotating circular saw in a fixed position, it was not only inefficient and labor intensive, but also had large errors in cutting dimensions and was dangerous.

In view of this point, the present proposal was devised, in which a scattering plate is fixed to a freely rotatable drive shaft, a molded product support is further fixed above the scattering plate, and a core frame with an adjustment nut screwed together is installed near the scattering plate. A cylindrical body which is freely rotatable and can be freely moved up and down in the axial direction is loosely fitted into the core frame, and its lower end is supported by the adjustment nut, and one end of the arm is attached to the cylindrical body. is fixed at a right angle, the upper part of an abbreviated member is fixed at a right angle to the other end of the arm, the lower side of the member is a horizontal part, and the lower part of the member has an axial vertical part. A rotary shaft having a hole formed therein is rotatably fixed, a circular saw is fixed to a position facing the molded product support using the rotary shaft, and a fixed shaft whose upper portion is loosely inserted into the vertical hole is attached to the horizontal portion. A disk that is fixed and rotates on the fixed shaft via a bearing is rotated to a position opposite to the scattering plate.
At the same time, a pressing plate is provided on the upper part of the molded product support body, which can move vertically and freely rotate, and a lever protruding in the radial direction of the core frame is fixed to the core frame, and the lever is moved by a spring into the circle. While applying force to the plate side, a pneumatic cylinder that approaches and separates from the lever is installed near the lever, and the piston rod of the pneumatic cylinder pushes the lever 1. A device for cutting an unnecessary part of a molded product made of a plastic sheet material by pressing it in a direction away from the molded product support, wherein a cutting groove is formed on the outer peripheral surface of the molded product support using the circular saw. The main points are as follows.

Next, an embodiment of the present invention will be described based on the drawings.

Reference numeral 1 denotes a box body in which a part of the front surface and a part of the side surface continuous with the part are open, and a motor 3 is attached to the bottom part 2 of the box body 1, and a motor 3 is connected to the motor 3 via a belt 4. The reducer 5 is fixed, and the disk body 7 is fixed to the drive shaft 6 of the reducer 5 with bolts (not shown).

Thus, on the upper part of the disc body 7, scattering plates 8 are spaced apart, and molded product supports 9 are further spaced apart on the upper part of the disc body 7, and a plurality of poles 10 are detachably fixed to the disc body 7. And it is fixed with a nut 11 so that it can be attached and detached freely.

In other words, the scattering plate 8 and the molded product support 9 are configured to be rotated by the motor 3 via the drive shaft 6.

Further, 12 is a core frame which is freely rotatably erected on the bottom portion 2 near the chain plate 8, and a screw 15 is formed near the bottom of the core frame 12.

The length of the core frame 12 is such that it penetrates the ceiling part 13 of the box body 1 and protrudes outside the ceiling, and the core frame 12 has a bearing 14 fixed to the inner wall of the box body 1. It supports rotation freely.

Further, an adjusting nut 16 is screwed into the screw 15 so that it can move freely up and down.

In addition, a cylindrical body 17 shorter than the core frame 12 whose lower end is supported by the adjustment nut 16 is loosely fitted into the core frame 12, and the core frame 12 and the cylinder 17 are arranged so that they cannot rotate and can only move up and down. The key 18 is interposed between them.

In other words, the cylindrical body 17 and the core frame 12 can rotate in the same manner.

Thus, a flat plate 19 is fixed at right angles to the substantially central portion of the cylinder 17 in the axial direction, and the vicinity of one end of the arm 20 is fixed to the flat plate 19.

The arm 20 is constructed as shown in an enlarged view in FIG.

That is, a member 22 having an abbreviated shape is fixed at a right angle downwardly to the vicinity of the tip of the opening-shaped cross-sectional member 21, and the vicinity of the end of the opening-shaped cross-section member 21 is fixed to the flat plate 19 as described above. The arm 20 is fixed to the upper surface of the member 2 in a horizontal direction.
2 toward the molded product support 9 side.

Further, a motor 23 is fixed to the side surface of the arm 20, and a pulley 25 is fixed to the tip of the rotating shaft 24 of the motor 23.

A rotary shaft 28 having an axial vertical hole 27 formed in the lower part thereof is rotatably supported by the member 22 via a bearing 26, and a pulley 29 is fixed to the upper part of the rotary shaft 28. A belt 30 is provided between the pulley 25 and the rotary shaft 28, and the motor 23 rotates the rotating shaft 28.

Further, 31 is a circular saw, and the circular saw 31 is fixed to the rotary shaft 28 so as to face the side surface (outer peripheral surface) of the molded product support 9.

Reference numeral 32 denotes a disk, which passes through a notch 34 formed at the tip of the horizontal portion 33 of the member 22, as shown in an enlarged view in FIG. 4, and has a fixed shaft 35 fixed to the horizontal portion 33. The upper part of the fixed shaft 35 is loosely inserted into the vertical hole 27 of the rotating shaft 28 and is opposed to the side surface (outer peripheral surface) of the scattering plate 8. be.

That is, the circular saw 31 is driven by the fixed shaft 35 as the disc 32 moves, but is free to rotate in the horizontal portion 33 below the circular saw 31 without receiving the rotational force of the rotating shaft 28. It forms.

Reference numeral 37 denotes a press plate provided directly above the molded product support 9, and the press plate 37 connects a freely rotatable flat body to the tip of the piston rod of the pneumatic cylinder 38 fixed to the ceiling 13. It is constructed so that it can be moved up and down by the action of the pneumatic cylinder 38, and as will become clear later on, it is configured to be rotatable while pressing the molded product whose unnecessary portion is to be cut off.

Further, 39 is the upper part of the core frame 12, in other words, the core frame 12
The lever 39 is a lever that is fixed in a protruding manner in the radial direction of the core frame 12 at a portion that penetrates the ceiling portion 13.
One end of the tension spring is fixed, and the other end is attached to the ceiling part 1.
3, and a tension spring 40 is used to pull the lever 39 toward the disc 32.

Incidentally, instead of the spring 40, a push spring (not shown) is used, and the push spring moves the lever 3.
9 may be pressed against the disk 32 side.

However, as mentioned above, the lever 39 is moved by the tension spring 40.
The core frame 1 is pulled toward the disc 32 side and the lever 39 is fixed.
2 is rotated, and the cylindrical body 17 and arm 20 fixed to the core frame 12 (fixed in the rotational direction) are rotated, and the disc 32 provided on the arm 20 via the member 22 is attached to the side surface of the scattering plate 8. Furthermore, the circular saw 31 is configured to come into contact with the side surface of the molded product support 9.

Reference numeral 41 denotes a pneumatic cylinder fixed near the lever 39 on the ceiling part 13, and the tip of the piston rod of the cylinder 41 pulls the lever 39 and presses it against the spring 40 to return the lever 39 to its original position. In other words, the arm 20 is constructed so as to return to its original position.

As the motor 3 will become clear later, it may be advantageous to use a maximum conversion motor that rotates at a low speed only within a certain period of time in order to cut unnecessary parts.

The cutting device of the present invention is constructed as described above, and the method of use and operation and effects thereof will be explained next.

First, the preparatory work will be explained.

A scattering plate 8 and a molded product support 9 having the same outer peripheral surface as the outer peripheral surface of the molded product whose unnecessary portion is to be cut are fixed to the disc body 7 with bolts 10 and nuts 11.

Next, the pneumatic cylinder 41 is actuated to advance the piston rod, the lever 39 is pressed against the tension spring 40, the core frame 12 is rotated, and the arm is fixed to the core frame 12 via the cylindrical body 17. 20 to separate the arm 20 from the molded product support 9.

Next, the molded product whose unnecessary parts are to be cut is placed on the molded product support 9, and the pneumatic cylinder 38 is activated to remove the pressing plate 37.
is moved downward to fix the molded product on the molded product support 9.

Next, the piston rod of the pneumatic cylinder 41 is withdrawn and the relationship between the piston rod and the tension spring 40 is severed, and the arm 20 with the key 18 secured to the core frame 12 is moved by the tension force of the tension spring 40 via the lever 39. By rotating the arm 20 through the member 22, the circular plate 32 is brought into contact with the side surface of the scattering plate 8, and the circular saw 31 is brought into contact with the side surface of the molded product, thereby determining the cutting position by the circular saw 31. .

This cutting position can be easily determined by moving the adjustment nut 16 up and down to move the cylindrical body 17 up and down to determine the position of the circular saw 31.

Once the cutting position is determined, the pneumatic cylinder 4 is
1, the arm 20 is separated from the molded product support 9 and the molded product is removed from the molded product support 9. Then, in the same manner as described above, the circular plate 32 is placed on the outer peripheral surface of the scattering plate 8, and the circular saw 31 is It is brought into contact with the side surface of the molded product support 9, and then the motor 3 is driven to rotate the scattering plate 8 and the molded product support 9 via the disc body 7.

Due to this rotation, the disk 32 that is in contact with the side surface of the scattering plate 8 rotates in contact with it and moves along the shape of the outer periphery of the scattering plate 8 against the spring 40. A circular saw 31 driven by the circular saw 31 is similarly moved via the motor 23, and the circular saw 31, which is rotated by the motor 23, forms a cutting groove at the cutting position on the outer circumferential surface of the molded product support 9.

The preparation work is completed by forming cutting grooves on the outer circumferential surface of the molded product support 9, but forming the cutting grooves in this way is necessary to cut unnecessary parts of a large number of molded products. This is to prevent the tips of the teeth of the circular saw 31 from coming into contact with the molded product support 9 and wear out each time the circular saw 31 cuts, thereby allowing the circular saw 31 to be used for a long period of time.

When the preparation work of forming cutting grooves on the outer peripheral surface of the molded product support 9 is completed as described above, the pneumatic cylinder 41 is operated as described above to operate the arm 20, in other words, the circular saw 31, via the lever 39. Separate from the molded product support 9, cover the molded product support 9 with the molded product a whose unnecessary parts are to be cut,
Next, the pneumatic cylinder 38 is operated to press the molded product a with the press plate 37, so that the molded product a is clamped and fixed between the press plate 37 and the molded product support 9.

Next, the piston rod of the pneumatic cylinder 41 is retracted to break off the relationship between the lever 39 and the pneumatic cylinder 41, and the lever 39, core frame 12, cylinder 17, arm 20, and member 22 are moved by the restoring force of the tension spring 40. The circular saw 31 and the disc 32 are brought into contact with the outer peripheral surfaces of the molded product a and the scattering plate 8, respectively.

At the same time, when the circular saw 31 is rotated via the motor 23 and the scattering plate 8 is rotated via the motor 3, the disc 32 contacts and rotates along the outer peripheral surface of the scattering plate 8, for example, the uneven surface, as described above. Since the circular saw 31 rotates in the same direction as the scattering plate 8 as described above, the circular saw 31 follows the movement of the disc 32 and cuts off the unnecessary portion of the molded product a while the scattering plate 8 rotates once. It is.

When the cutting is completed, the piston rod of the pneumatic cylinder 38 is retracted, and the piston rod of the pneumatic cylinder 41 is advanced, and the lever 39 is returned to its original position to cut the unnecessary portion from the molded product support 9. Item a is removed.

Thus, the driving and stopping of the motors 3 and 23 and the operation of the pneumatic cylinders 41 and 38 are all electrically operated so as to operate during one rotation of the disc body 7.

Furthermore, if the peripheral walls of the molded product whose unnecessary parts are to be cut are other than a perfect circle, for example, rectangular, the distance between the peripheral walls is different from the center of rotation of the molded product attached to the molded product support 9, and the maximum radius The circular saw 31 is rotating at a constant speed in the same direction even though the circumferential rotational speed of the molded product is at its maximum at a certain point, which may strain the cutting force of the circular saw 31, so if there is such a risk, It is advantageous to use a maximum conversion motor as the motor 3 so that it rotates at a low speed at the maximum radius portion so as not to put strain on the circular saw.

As is clear from the above explanation, the cutting device of the present invention is constructed as described above, and all operations except the operation of attaching and detaching the molded product a to the molded product support 9 are automatic, thereby making it possible to significantly improve the cutting efficiency. .

Furthermore, even if the molded product a is thin and deformed, the molded product is pressed by the press plate 37 to correct the deformation before cutting, so there is no error in cutting dimensions, and it is less dangerous than the conventional method. It has no gender.

Further, since the circular plate 32 is rotated in close contact with the scattering plate 8 by the uniform tensile force of the tension spring 40, the circular saw 31 does not separate from the molded product a, and no uncut portion occurs.

Since the cutting device of the present invention is configured as described above, cutting can be automated, cutting efficiency can be significantly improved, and there is a remarkable effect that no defective products are produced.

[Brief explanation of the drawing]

The drawings show an embodiment of the proposed cutting device, with FIG. 1 being a partially cutaway front view, and FIG. 2 being a partially cutaway plan view.
FIG. 3 is an explanatory view of the arm, and FIG. 4 is an explanatory cross-sectional view of the disc portion.

Claims (1)

[Scope of utility model registration request] A scattering plate is fixed to a freely rotatable drive shaft, and a molded product support is further fixed above the scattering plate, and a core frame with an adjusting nut screwed thereon is freely rotatably erected near the scatterer plate, and a rotatable plate is attached to the core frame. A cylindrical body that is movable up and down only in the axial direction is loosely fitted, and its lower end is supported by the adjustment nut, and one end of an arm is fixed to the cylindrical body at right angles, and the other end of the arm is approximately The upper part of an L-shaped member is fixed at a right angle, the lower side of the member is a horizontal part, and a rotating shaft having an axial vertical hole formed in the lower part is rotatably fixed to the member, A circular saw is fixed to a position facing the molded product support by the rotating shaft, and a fixed shaft whose upper portion is loosely inserted into the vertical hole is fixed to the horizontal portion, and the circular saw is rotated via a bearing on the fixed shaft. A disc is provided at a position opposite to the scattering plate so as to be freely rotatable, while a pressing plate is provided above the molded product support body so as to be able to move vertically and freely rotate;
A lever protruding in the radial direction of the core frame is fixed to the core frame, and the lever is biased toward the disc side by a spring, while a pneumatic cylinder that approaches and separates from the lever is provided near the lever, and the pneumatic cylinder A device for cutting an unnecessary part of a molded product made of a plastic sheet, the lever being pressed in a direction away from the molded product support by a piston rod, the circular saw cutting the unnecessary part of the molded product support. A device for cutting unnecessary parts of a molded product made from a plastic sheet, characterized in that a cutting groove is formed on the outer peripheral surface.