JPS58175631A - Cutting device for gate of injection-molded product - Google Patents

Abstract

PURPOSE:To cut a plurality of products formed into various shapes by injection- molding at its gate part by equipping a cutting device and a jig receiving table with a special construction. CONSTITUTION:A cutting device B is fixed to the holder A equipped on a holder seat 1 such that cutting edges K are vertically and holizontally movable, and a jig receiving table is mounted on the holder seat 1 in the position corresponding to the edges K of the cutting device B. In the cutting device B, a disc 5 is fixed to the shaft-end of a motor with a gear. One end of a pivot lever 6 is connected by journal to the eccentric position of this disc 5, and to the other end thereof, the upper end of a slider 7 is freely rotatably connected by journal. To the lower end of the slider 7, the chack 15 holding a plurality of the cutting edges is fixed in one row or two rows. On the jig receiving table C, a movable support 19 is kept by a guide 20 and fixed by a cramping screw 21. The hole into which a bolt 23 is inserted is prepared in this movable support 19, and the bolt moves a elevator-table 22 up and down. A jig fixing plate 25 is fitted on the surface of the elevator table 22.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting device f created primarily for the purpose of cutting injection molded parts.

Conventionally, in multi-piece injection molded parts, each part is connected to a gate branch, so in order to cut this, a K
was cut one by one with iron, so
This work was not only inefficient, but also had a major drawback in that it resulted in uneven cutting results and often resulted in defective parts.

This invention has been developed to overcome the drawbacks of the conventional work as described above.

As shown in Fig. 1, when the injection molded parts are made of four parts, each part (P) is connected to the mounting part (G) by the branch of the gate (G), symmetrically arranged in two rows. The four-piece part (P) can be molded or attached to the mounting part (G1) as shown in Figure 2.
The mounting part of the molded product shown in Figures 1 and 2 above (G
1) is molded in a raised manner on the lower side of the part (P) as shown in Fig. 3, or the part (P) is molded as shown in Fig. 4.
On the surface of the mounting part, there are molded parts such as those with raised G.

This invention diversifies the arrangement of the cutting blades in consideration of the shape of the injection molded product, and the cutting blades are arranged in multiple rows, in multiple rows, and in two rows, and the angle of the cutting blades is changed. The cutting blade is designed so that it can be rotated vertically and horizontally.

In addition, the jig is carefully configured to correspond to the shape of the injection molded part, and in this case, a grid-like scale is provided on the surface of the jig mounting plate, and the jig is attached and assembled. The work was carried out under extreme pressure.

In other words, a mounting base, a cutting machine, and a jig holder are combined and mounted on the base.The mounting base is shaped like a rectangular case with an open surface, and there are a pair of holes on the top and both sides of the base. A screw hole is provided to allow the cutting blade of the cutting machine to operate vertically and horizontally, so that the entire cutting machine can be repositioned horizontally and vertically. In order to position the jig, the jig holder can be easily adjusted back and forth and further up and down.

In addition, the cutting blade is attached by a chuck to a slider that is operated by a crank mechanism that converts the rotary motion of the motor into linear motion, and by installing the cutting machine vertically or horizontally, the cutting blade also moves vertically. The chuck is configured to operate horizontally or horizontally, and the chuck is available in two types: one that clamps multiple cutting blades in one row and one that clamps cutting blades in two rows, and can be replaced depending on the application. It is something. Father, the clamping piece of the cutting blade and the mounting piece that is inserted into the slider are fixed to each other by a set screw, so it is possible to fix the piece to the mounting piece at any angle. . Therefore, the angle of the cutting blade can be freely changed according to the object to be cut, and cutting work can be performed according to the types of injection molded parts as shown in Figs. 1 to 4 above. This is an extremely useful invention.

Specific examples will be described below.

Embodiment As shown in FIGS. 5 to 7, a mounting base (MU), a cutting machine (B), and a jig holder (0) are combined and mounted on a base (1).

The mounting base (M) is a rectangular case with an opening at the front, and a pair of mounting screw holes (2) are provided on the top surface of the mounting base for horizontally mounting the cutting machine (B). A pair of screw holes (3) are provided for vertically mounting the cutting machine (B), and the cutting machine (B) is assembled and covered with a case that accommodates the internal pressure of the mounting base (A). A geared motor (M) with a gear ratio so as to make 77 rotations is connected to a VC rotating shaft (4), and a disk (5) is attached to the end of this rotating shaft. This disc (5)
The handle (51) is screwed and removably attached when used as a push wheel and a crank.

In the case of a crank, a connecting rod (
6) One end is rotatably fixed to a shaft, and at the other end, a slider (7) is rotatably fixed to the upper end, and a clamping groove (1) is formed at the lower end of the slider (7). A set screw (8) is attached to the front of this.

Guide (9) to move the slider (7) in a straight line.
) holds and configures both sides of the slider.

When installing the above cutting machine (B) horizontally on the mounting base (A), hold the cutting machine by the band (10) K and tighten by screwing the set screw (11) into the screw hole (2). . When installing vertically, the cutting machine (B) is housed together with the case through the opening of the mounting base (M), and the setscrews (11) are screwed into the screw holes (3) on both sides and tightened.

There is a chuck in the clamping groove (7-) of the slider (7).
The mounting piece (12) is inserted and tightened with a set screw (8). They are prepared and used interchangeably depending on the purpose.

The configuration of the chuck for the cutting blades in the - row is such that a mounting piece and a rectangular piece (13) are rotatably tightened by a set screw (14) K, and the piece can be rotated at a required angle with respect to the mounting piece. This piece (13) is combined with a splicing piece (15), and a set screw (
16) are fixed at two places, and are pressed so that a plurality of rows of cutting blades (K) are held between both arms. 'Shang, (15')
is a scale for positioning the cutting blade.

In the chuck that presses the cutting blade in two rows, a mounting seat (17) is fixed to the mounting piece (12) at the center by a set screw (14), and a mounting seat (1) is attached to the mounting seat (1) from both sides in a straight line toward the center. The cut grooves (4) 1) are formed symmetrically, and each cut groove (1)
) I) K is a rectangular piece (13) and a splicing piece (15) combined with a right-hand screw and a knee (16), and the cutting blade (K) is planted in a chuck piece (13) that is held in multiple rows. Insert the paper (1B) and attach it correctly with the paper (1B') and attach the cutting blades in two rows. Also, the angle of the cutting blade can be changed by loosening the nut. (See Figures 9 to 11) The two types of chucks mentioned above are used interchangeably depending on the purpose.

The jig holder (0) corresponding to the cutting blade is held by guides (20) K on both sides so that the movable table (19) can be moved back and forth on the surface of the pedestal (1), and is held by a set screw (21). Set it in place.

This moving unit (19) has a lifting platform (22) with bolts (
23) is screwed into the screw hole of the moving platform (19), and this bolt (23) K is attached to the nut (23).
1) rotates the bolt and moves the lifting platform (22) up and down.

A stop groove (24) is formed on the surface of the lifting platform (22), on which the jig mounting plate (5) is fitted and mounted, and the other mounting plate (25) is made of synthetic resin and is attached to the back side. There is a stopper (25
1) is over-molded, and the surface has grid scales (26).
is held.

(2'7) is a jig, which is positioned and pasted according to the shape of the object to be cut according to the scale.

The practical example of this invention is as described above, and it is used for the injection molded part (P) and the mounting part (G') of the gate (G).
) The operation differs depending on the shape.

As shown in the molded part shown in Figure 1, each part (
(P) is goo) Take 1s (G) with the correct interval on (G)
'), and when this mounting part (G1) is mounted on the lower part of the part as shown in Fig. The two parts (P) can be cut at the same time at the attachment part (G1) by two cutting blades held in a line in a chuck.In this case, the cutting blades are vertically The cutting machine (B) is operated by the mounting base (A).
Position the band (10) horizontally against the right screw (11)
and screw hole (2) to hold down the cutting machine (B).

Next, the motor is rotated to move the slider (7) up and down from the connecting rod (6) K which is fixed at the eccentric position of the disk (5), and the cutting blade (K) is actuated to drive the part (P). ) and goo ) (
The attachment part (G') of G) is cut, the parts on one side are further repositioned and attached to a jig, and the remaining parts are cut in the same way.

As shown in the following KM2 diagram, if the position of the mounting part (G1) of the part (P) and the gate (G) is at an angle in the shape of a square in the plane, use a double-row chuck and Depth of cut #l
(1'7') K: Bolt (18) and nut (To install the chuck with 18 bolts, change the angle corresponding to the angle and fix piece 0 with nut (1B'). The cutting blade (K) is lowered to the attachment part (Gυ) of the two parts (P) on one side to cut it, the direction is changed and the jig is held again to cut the remaining parts.

In all of the above, the mounting part (al) is a part (
P), but if the mounting part (G1) is raised on the surface of the part as shown in Fig. 4, it should be cut as if it were cut with a plane. In that case, house the cutting machine (B) together with the case in the mount (A), hold it vertically, and insert the screw hole (
3) Tighten the cutting machine (B) to the mounting base by screwing the locking screw (11) so that the cutting blade (K) can be operated in the horizontal direction. (See Figure 8) At the same time, loosen the set screw (21) to move the moving table (19) of the jig holder (0) toward you, move the moving table, and tighten it again with the correct screw to position it. Then, rotate the bolt (23) with the nut (23) to position the elevator platform (22) at the appropriate position, and
Since the cutting blade (K) moves parallel to the jig mounting plate (25), the stone of the jig mounting plate (-(2)
5 is placed in the opposite pressure position to prevent the jig mounting plate from moving during cutting due to the operation of the cutting blade.

In addition, the jig (27) is assembled into a shape that holds the parts as shown in Fig. 4, and the injection molded parts held by the jig (KIM) are assembled so that the cutting blade moves horizontally by the rotation of the motor. This is to cut the mounting part that is raised on the surface of the part.

In this case, the cutting blade acts as a plane, so
In order to prevent the cutting edge from wobbling, pads are placed on the front and back surfaces of the cutting blade and held by a chuck to prevent the cutting blade from wobbling.

This invention operates as described above.

In addition, it can be used manually by stopping the rotation of the motor and attaching a handle (51) to the disc (5) as a wheel. This cutting device can be used.

In addition, this cutting device is extremely convenient because the cutting blade can be easily switched between horizontal and vertical directions depending on the shape of the injection molded part.Furthermore, the jig has a scale on the mounting plate. When assembling a jig, it is easy to assemble the jig according to the shape of the object to be cut. Since it has a scale, it can be positioned accurately in accordance with the object to be cut, making it extremely useful for cutting various injection molded parts accurately and quickly.

Although not shown, the vertical movement of the slider allows the breaker to be
Alternatively, it is possible to use a cutting machine such as a push cutter as an adapter.

[Brief explanation of drawings]

Fig. 1 is a front view of the injection molded part with four additional parts, a side view of the second position, Fig. 4 is a side view of the gate and part mounting part located on the surface of the part, and Fig. 5 is a side view of the injection molded part in the second position. 6 is a partially cutaway side view of the whole, FIG. 7 is a partially cutaway front view of the whole, and FIG. 8 is a partially cutaway side view of the cutting machine stored in the mounting base. Figure 9 is a perspective view of the chuck before assembly;
FIG. 10 is an exploded perspective view of a chuck in a separate example before assembly;
FIG. 11 is a bottom view of the chuck, FIG. 12 is an exploded perspective view showing the jig and mounting plate, and FIG. 13 is a perspective view of the chuck in an assembled state. In addition, the symbol (1) in the figure: pedestal, (A): mounting base,
(2) (3)...screw hole, (B)...cutting machine, (M
)... Geared motor, (4)... Rotating shaft, (
5)...disk, (5su...han)"ru, (6)...
・Connection rod, ('7)...Slider, ('7')...Holding groove, (8)...Set screw, (9)...Guide% (
lo)... Band, (11)... Set screw, (D)...
...Chuck% (12)...Mounting piece, (13)
...Block, (14)...Set screw % (15)...Additional piece, (15')...Scale, (16)...Correct screw,
(K)...Cutting blade, (1η...Mounting seat, (17')
... Cut groove, (18) ... Bolt, (181)
... Nut, (C) ... Jig holder, (19) ... Moving table, (go) ... Guide, (21) ... Right screw,
(22)...lifting platform, (23)-...por), (23
Nut, (24) Stop groove, (25) Jig mounting plate, (25') Stopper% (26)
...Scale, (2))...Jig. Patent applicant: Yu Naka Sawaiwa

Claims (5)

[Claims] (1) A rectangular case-like mounting base with an open front is established on the pedestal, and a pair of screw holes are provided on the top and both sides of the mounting base. The cutting blade is installed in a different position so that it can operate vertically or horizontally, and the pedestal shown in (b) below is installed on the pedestal, and the jig is installed in a position that does not correspond to the blade of the cutting machine. A gate cutting device for injection molded parts. (a) A rotating shaft is connected to the geared motor, a disk is attached to the end of the rotating shaft, one end of a connecting rod is rotatably fixed to the eccentric position of the disk, and a slider is attached to the other end. The upper end is rotatably fixed to the shaft, the lower end of the slider is formed into a clamping groove, a set screw is attached to the front of the slider, both sides of the slider are supported by guides, these are covered by a case, and the slider is clamped. A cutting machine in which a mounting piece for a chuck that holds cutting blades in multiple rows or two rows is inserted into the groove. (b) Both sides of the movable platform are held by guides and fixed with positive screws, and an elevating platform is attached to this movable platform so that it can be raised and lowered through the screw hole of the movable platform using bolts, and a stop groove is installed on the surface of the elevating platform. This is a jig holder on which a jig mounting plate is fitted and placed. (2) A patent claim in which the above chuck has a structure in which a rectangular piece is rotatably attached to the mounting piece with a set screw, a support piece is assembled to the piece with a screw, and cutting blades are sandwiched in multiple rows between both breasts. A gate cutting device for injection molded parts according to item 1. (3) The structure of the above chuck is that the center of the mounting seat is attached to the mounting piece with a set screw, and cut grooves are formed symmetrically on both sides of the mounting seat, and cutting blades are formed in both cut grooves. A gout cutting device for injection molded parts according to claims 1 and 2, in which bolts inserted into the pieces of a chuck, which are clamped in a plurality of rows, are inserted and secured by nuts. (4) The gate cutting device for injection molded parts according to claim 1, wherein the circumferential pressure of the disk is provided with a handle that can be attached or detached by screwing. (5) The gate cutting device for soft injection molded parts as set forth in claim 1, wherein a grid scale is provided on the surface of the jig mounting plate.