JPH0134760B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a trimming device for synthetic resin molded products.

<Prior art> After forming a large number of molded products on one sheet by performing press molding or other sheet forming on a synthetic resin sheet such as a foamed sheet, a trimming operation is performed to cut and separate each product. was. Conventionally, the device for performing this trimming used a cutting section using a Thomson blade to trim and then immediately transferred the molded product along with the cutting section (for example, see Japanese Patent Publication No. 58-34279). In addition to the drawback that the molded product comes apart irregularly from the cut section, if the trimmed product is attached to the cut section, it becomes extremely troublesome to remove and collect the molded product from the cut section in the recovery section. It was hot.

In addition, when obtaining a large number of molded products from one sheet by trimming and cutting, in order to minimize the surplus parts that do not become constituent parts of the molded product and use the sheet efficiently, it is necessary to A sheet is formed with the ends connected, and the ends of the molded products are trimmed and cut.
Molded products are being manufactured.

However, when manufactured in this manner, if the molded product is, for example, circular, star-shaped scrubs will occur between the molded products during the above-mentioned trimming between the ends. In the past, this scrap was removed manually, which was inefficient, and although it has become possible to use sheet materials more effectively, there are still problems in terms of improving productivity. It was hot.

Therefore, in this invention, it is possible to overcome the above-mentioned conventional drawbacks, prevent the molded products from coming apart immediately after trimming, and also remove the star particles generated between each molded product and recover the molded products after trimming. It is an object of the present invention to provide a trimming device that can perform trimming efficiently and reliably.

<Structure> The trimming device of the present invention to achieve the above object has a cutting section equipped with a Thomson blade holder on the lower surface of the base installed at the top, and a star-shaped trimming device formed between a plurality of products. A press plate is provided below the base that is movable along the arrangement direction of the cutting part and the star part, and the press plate includes a cutting part equipped with a Thomson blade; Star-shaped portions for collecting the star-shaped scrap are formed at the same intervals corresponding to the cutting portion and the star-shaped portion of the base, respectively, and configured such that the base and the press plate can be brought into pressure contact with each other and separated from each other, and The cutting part and the star-shaped part of the base are each provided with suction means formed to be able to temporarily suction the molded product.

<Example> Next, examples of the present invention will be illustrated below with reference to the drawings.

Reference numeral 1 denotes a base, which is fixedly installed on the top of the device. The base 1 has a cutting part A and a star-shaped part B arranged side by side, and in the cutting part A, the lower surface of the base 1 is used as a holder 10 for a Thomson blade in combination with a Thomson blade, which will be described later. In addition, a suction hole 11 by blower suction is opened in the center of the Thomson blade holder 10 as a product suction means, so that the molded product P can be held by suction, and the molded product after trimming can be held on the base 1 side. It allows temporary suction to occur. Next, in the star-removing part B, a star-removal dowel pin 12 is protruded from the lower surface of the base 1 to make it possible to extract small scrap pieces, so-called star scraps S, that occur between molded products, and a suction hole 13 is opened in the center of the molded product. The product P can be suctioned, and this suction hole 13 communicates with the suction hole 13 of the cutting section A by blower suction, and is connected to a common blower suction device.

As the suction device for the suction hole 11 or 13, a blower that suctions at a negative pressure of about 30 mmHg is suitable for suctioning the molded product.
Vacuum suction using a vacuum pump that suctions at a high vacuum of about mmHg can also be used, but in this case, the vacuum pump has the disadvantage of becoming larger and becoming less efficient.

Reference numeral 2 denotes a press plate, which has a cutting part A' corresponding to the cutting part A of the base 1, a star-shaped part B' corresponding to the star-shaped part B, and a mounting plate on which the molded product P is placed. Part C' is arranged parallel to the star-shaped part B'. The press plate 2 is mounted on a lift plate 3 that can be raised and lowered by a hydraulic cylinder 30, and can also be moved horizontally on the lift plate 3 by wheels 20 provided at the bottom of the press plate 2. It's getting old. Then, cut the cut part A' and the star part B' into the base 1, respectively.
(see Figure 1), or move the press plate 2 and place the star-shaped part of the press plate 2 below the cut part A of the base 1.
B', placing part C' is placed below the star-shaped part B of the base 1, and the cutting part A' of the press plate 2 is placed on the base 1.
It is possible to freely select either arrangement such that it protrudes to the outside (see Fig. 4) or either arrangement.

A Thomson blade 21 is provided in the cutting section A' of the press plate 2, and can cut the molded product P by inserting it between it and the Thomson blade holder 10 of the base 1. Next, a star collecting hole 22 is formed in the star collecting part B', and a star collecting jig 2 is placed around this hole 22.
3 is provided in a protruding manner to facilitate the extraction of star chips S by the star-removing knock pin 12 of the base plate 1. That is, when pulling out the star shavings S downward from above the molded product using the dowel pin 12, which has a cross-shaped tip that can come into contact with the inside of the star shavings S shape of the molded product, an appropriate portion approximately adjacent to the outer periphery of the dowel pin 12 is used. A triangular plate-shaped jig 23 with a pointed tip is provided at the positions (four locations in the figure) to prevent the part W of the product P on the outer periphery of the star scum S from being pushed down together with the star scum S. This ensures that only the star scum S is removed and prevents excessive force from being applied to the product W or deforming it (see Figure 2).

In particular, according to the above structure, it is possible to easily deal with changes in the shape of the molded product P by making the dowel pins 12 and the jig 23 replaceable by tightening bolts, etc. It is not affected by this and has excellent flexibility.

Note that a hopper 31 for collecting stardust is provided on the elevator plate 3 at a location corresponding to the lower part of the stardust collection hole 22, so that the extracted stardust can be collected all at once.

The part W of the product that protrudes downward when the molded product P is placed on the placing part C' of the press plate 2 is placed on the press plate 2.
A through-hole 24 is formed to prevent interference with the

As a mechanism for supplying molded products to the trimming device, first, a table lifter 5 for supplying molded products is provided on the side of the lifting plate 3 and press plate 2.
A large number of sheet-like molded products P can be stacked and placed on this lifter 5. The molded product transfer pad 6, which is movable between the upper position of the lifter 5 and the outside position of the base 1, is equipped with a suction plate 60 on the lower surface that is operated by blower suction, and the molded product P is suctioned and held by the lifter. 5 onto the Thomson blade 21 of the press plate 2 which is arranged so as to protrude outward from the base 3. Then, as the molded products P are taken out one by one, the lifter 5 lifts the stacked molded products P, always holds the top molded product P at a constant height, and transfers the molded products P one by one by the transport pad 6. It makes it easy to take out.

Among the above-mentioned devices, in addition to the illustrated wheels 20 and hydraulic cylinders 30, various known mechanisms for lifting and horizontally moving the press platen 2, such as hydraulic cylinders, chain traction, cranks, and rat pinion mechanisms, are used for moving water. A mechanism is used, and the mechanism for elevating and lowering can be replaced with each of the above mechanisms, and can be freely changed as necessary for implementation.

Furthermore, the feeding mechanism for molded products can be modified in various ways by combining conveyors, extrusion by cylinders, and other mechanisms.For example, the molded product can be transferred from the molding device to the trimming device of the present invention If you automate everything, it will become very efficient. In addition, by combining a mechanism that collects the product placed on the platform C' and removes the edges E of the molded product P, it becomes possible to automate the entire process from product packaging to shipping. .

The operation of the trimming device as described above will be explained.

First, the molded product P is a product W in the shape of a container, etc., which is bulged and formed from foamed or non-foamed sheet materials of various synthetic resins by so-called sheet forming such as vacuum forming and press forming. A large number of products are formed side by side on a single molded product P. And each product W in the center of the molded product P
The small scrap pieces produced during this process are called stardust S, and the frame-shaped scraps produced on the outer periphery of the molded product P are called ears E. This trimming device trims the stardust S.

The steps are shown in Fig. 4 to Fig. 8, and the fourth
In the figure, each part A', B' of the press plate 2 and the base 1 are shown.
The parts A and B of the press plate 2 are arranged so that they are shifted from each other, and the cut molded product P supplied by the conveyor pad 6 is placed on the Thomson blade 21 of the cutting part A' of the press plate 2. The molded product P after cutting is placed on the portion B', and the molded product P from which the star scum S has been extracted is placed on the placement portion C'.

Next, in FIG. 5, the press plate 2 is moved, and the upper and lower parts A and A' and B and B' are placed in corresponding positions. Then, the transport pad 6 moves toward the lifter 5 side.

In FIG. 6, the press plate 2 is raised toward the base 1 together with the lifting plate 3. Then, the cutting part A,
At A', the molded product P is trimmed by the Thomson blade 21 and the pedestal 10, and the star-shaped part B,
At B', the star shavings S are extracted using the dowel pin 12 and the jig 23 and dropped into the recovery hole 22.

Further, the conveyance pad 6 adsorbs one molded product P lifted by the upward movement of the supply lifter 5, and then the lifter 5 descends again to extract only one molded product P.

The molded product P on the mounting portion C' is recovered by a recovery device (not shown). However, it is also possible to collect a plurality of molded products P in a stacked state.

Next, moving to FIG. 7, at the same time as the press plate 2 is lowered, the cutting parts A and A' temporarily suction and hold the cut molded product P in the suction hole 11 of the base 1 so as not to come apart. Also in the star removal parts B and B', the star scum S is temporarily adsorbed by the suction holes 13 to prevent the molded product P from falling apart, and the star scum S is collected into the collection hopper 31 of the lifting plate 3. .

Next, in FIG. 8, the press plate 2 is returned to the position shown in FIG. 4 in which each part of the press plate 2 and the base 1 are shifted from each other, and the transfer pad 6 is moved to the Thomson blade 2 at the cutting section A'.
Move up 1.

After that, the suction of the transport pad 6 is released, the uncut molded product P is placed on the Thomson blade 21, the suction of the suction hole 11 is released, and the molded product P after cutting is placed on the star cut portion B'. If the suction hole 13 is released and the star-shaped molded product P is placed on the recovery hole 24 of the mounting portion C', the state will be exactly the same as that shown in FIG. 4.

Therefore, by sequentially repeating each of the above steps,
Molded product P is trimmed by cutting parts A and A',
The star shavings S can be automatically successively removed by the star removing parts B and B'.

By adhering the trimmed and cut molded product to the base 1 side and moving the press plate 2, the molded product P can be moved to the star-shaped portion B' in a series of work steps. Therefore, a significant improvement in workability can be expected.

<Effects of the Invention> Since the present invention is configured as described above, the trimmed molded product can be temporarily attracted to the base side and lifted, thereby eliminating the possibility of the molded product remaining on the Thomson blade. The molded product can be easily recovered from the cut portion, and the molded product will not come apart irregularly. In addition, by temporarily adsorbing the molded product to the substrate side, it is possible to easily transition from the cutting part of the molded product to the star-removed part, and from the star-removal part to the next process. Cutting and post-cutting operations can be performed in a series of configurations, contributing to improved productivity and labor savings.

Furthermore, the star dust that is generated when molded products of various shapes are taken from a single sheet can be efficiently removed by the star removal section provided on the base and the press plate, so that unnecessary particles can be removed from the molded product. It is possible to provide excellent synthetic resin molded products without the inclusion of stardust, and it is also possible to reduce costs because productivity is improved.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is an overall configuration diagram, Fig. 2 is an enlarged perspective view of the star-shaped part, Fig. 3 is a plan view of the molded product, and Figs. 4 to 8 are sequential operations. It is a process chart showing a state. 1...Base, 10...Base, 11, 13...Suction hole, 12...Knock pin, 2...Press plate, 2
1... Thomson blade, 22... Stardust collection hole, 23
...Jig, 24...Through hole, 3...Elevating plate, 6...
...Transportation pad, A, A'... Cutting section, B, B'...
Star part, C'... Placement part, P... Molded product, W...
Product, S... star scum.

Claims (1)

[Claims] 1. The lower surface of the base installed on the upper part is configured with a cutting part equipped with a cradle for a Thomson blade and a star-removing part for extracting star-like scrap produced between a plurality of products, A press plate is provided below the base and is movable along the direction in which the cutting part and the star-removing part are arranged, and the press plate has a cutting part equipped with a Thomson blade and a star-removing part for collecting the star-shaped scrap and are formed at the same intervals corresponding to the cut portion and the star-shaped portion of the base, respectively, and configured such that the base and the press plate can be brought into contact with each other and separated from each other, and the cut portion and the star-shaped portion of the base include A trimming device for a synthetic resin molded product, characterized in that each device is equipped with suction means formed to be able to temporarily suction a molded product. 2. The press plate is equipped with wheels attached to the lower part on the top surface of the lift plate, which can be raised and lowered freely, so that it can be raised and lowered and moved in the direction along the arrangement direction of the cutting part and the star-cutting part. A trimming device for synthetic resin molded products according to claim 1.