JPS6114925B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to continuous production equipment for thermoplastic resins that automates a line for molding thermoplastic resin materials to continuously obtain molded products.

In recent years, thermoplastic resins have come to be used in, for example, automobile parts.

Compared to metals, thermoplastic resins have characteristics such as being lightweight, not rusting, having good electrical insulation properties, and being able to be molded into more flexible shapes than metals, so thermoplastic resin sheets are pressed. Processing is becoming more and more common.

The molding methods known up to now include:
As shown in Fig. 3, a thermoplastic resin material a is cut in advance into appropriate dimensions and shapes according to the shape of the molded product using a braking equipment b installed on a line separate from the molding line and a shearing equipment c. Then, the obtained blanks d of various sizes and shapes are packaged e and supplied to the molding line from outside the molding line. The supplied blank d is immediately preheated in a preheating furnace f, then the preheated blank d is placed between the upper and lower molds h and i of the press g and pressurized, and the molded product j is taken out from the press g and transferred to the conveyor k. A common process is to transport the material and then obtain a post-processing device 1 for deburring and drilling, etc.

However, in the conventional method described above, the blanks d sent to the forming line are cut into various sizes and shapes, so when stocking them before supplying them to the forming line, the blanks d are stocked for each product with different sizes and shapes. Not only does this require a large space, but when supplying blanks to the molding line, a wide variety of blanks with different sizes and shapes cut to fit the shape of the molded product are lined up on the line leading to the molding line. As a result, the supply of blanks d became very complicated, and there were problems in automating the production of various molded products.Also, if each blank d of different size and shape was transported to the molding line, The delivery line must be reciprocated or set up in double rows, which inevitably increases the size of the equipment.

The present invention was made with the aim of eliminating the above-mentioned problems, achieving multi-product, mass production, and further saving labor. A device is installed that supplies the obtained blanks one after another to the molding line from outside the molding line, and the blanks supplied to the molding line are cut into various dimensions and shapes according to the shape and size of the molded product by the feeding device. At least two sets of shear devices are provided along the molding line, a device for heating the cut blank, and a press for pressure-forming the heated blank, and a feeding mechanism is arranged between each of the above-mentioned devices. It is characterized by the fact that

Embodiments of the present invention will be described below with reference to the drawings.

The continuous production equipment of the present invention includes a crane saver A that supplies a stack 2 of stacked blanks 1 cut to a fixed size onto a forming line, and a crane saver A that supplies a stack 2 of stacked blanks 1 cut to a fixed size onto a forming line, and a crane saver A that supplies a stack 2 of stacked blanks 1 cut to a fixed size onto a forming line, and a crane saver A that feeds a stack 2 of stacked blanks 1 cut to a fixed size onto a forming line. Data stack feeder 3 transporting sheets in the direction of the sheet line
and a shear device B that cuts the blank 1 selected by the stack feeder 3 into a predetermined size and shape.
A heating device C for preheating the cut blank 1 to a predetermined temperature, and a press D for press-forming the preheated blank 1 are sequentially provided on the line,
Blank 1 of thermoplastic resin material, which is always supplied with a constant size regardless of the shape and dimensions of the molded product, is automatically cut into shapes and dimensions that match the various molded products by shear device B installed in the line, and then cut. After preheating, the blank 1 is automatically fed into the press D to be molded, and the molded product is taken out.
The molding line is designed to continuously produce molded products of arbitrary shapes and sizes.

To be more specific, the crane saver A is used to supply the stack 2 to the forming line from outside the forming line, and is capable of moving in a direction perpendicular to the line, and is capable of transporting blanks 1 of a certain size. When the stack 2 is being transported to the stack station on the line, a spare stack 2' can be loaded.

The stack feeder 3 is for peeling off the blanks 1 stacked as the stack 2 one by one and transporting them from the stack station to the shearing device B. The stack feeder 3 is equipped with a vacuum cup 4 and is movable in the line direction. The vacuum cup 4 is connected to a vacuum generator (not shown).

The shear device B includes an input table 5 that receives the blanks 1 sent by the stack feeder 3, and an output table 6 that receives the cut blanks 1 and sends them to the heating device C. 2
separate shears 7 for cutting in the direction, i.e. longitudinal (perpendicular to the line) and transverse (line direction);
A total of two sets of 8 are provided, and the size, weight,
The blank 1 can be cut according to the shape, etc. Incidentally, a blank joining device 9 is assembled to the shear device B.

The heating device C is installed in a heating furnace 11 equipped with a conveyor 10 so as to move in the line direction.
A heater 12 is provided to sandwich the cut blank 1 being conveyed above and below, so that the blank 1 can be preheated to a predetermined temperature by a hot wire from the heater 12 while being carried on a conveyor 10 and being sent.

Further, the press D has upper and lower molds 13 and 14 for pressure-forming the blank 1 after preheating, and these molds can be replaced in a very short time by means of a bolster carrier 19.

Incidentally, between the heating device C and the press D, there is a preheated blank 1 sent out from inside the heating device C.
A loader 15 is provided for transferring the material between the molds 13 and 14 of the press D, and on the exit side of the press D,
An unloader 17 is provided that sucks the molded product 16, takes it out of the press, and transfers it onto a carry-out conveyor 18.

The drawing also shows the outlet side of the heating device C and the loader 15.
An example is shown in which a stacking mechanism for blanks 1 is installed on the input side of the machine, in which blanks 1 that have been cut into arbitrary shapes and dimensions and preheated are stacked to a thickness corresponding to the product, and then pressed. This shows the case when The stacking mechanism is composed of a preloader 20 that transfers the preheated blanks 1 parallel to the line, and a table 21 that moves perpendicular to the line. At this position, the parts are superimposed in a manner that corresponds to the change in the thick part of the product and the shape of the product.

The continuous production equipment of the present invention is equipped with each device along the molding line as described above, and molds a thermoplastic resin material, that is, a blank, brought in as a fixed size, into a molded product having an appropriate shape and size. With this structure, blanks with constant dimensions are supplied regardless of the shape of the molded product, without having to supply blanks that have been cut to the appropriate size and shape in advance to match the shape of the molded product to the molding line. Molded products with arbitrary shapes and dimensions can be obtained by simply using this method.

That is, first, a blank 1 cut to a certain size is
When the stack 2 made of stacked stacks of stacks is carried onto the crane saver A and placed on the crane saver A, the stack 2 is carried by the crane saver A to the disk stack station. Crane saver A has spare stack 2'
can be loaded, reducing the frequency of stack supply.

Stack 2 transported to the data stack station is blanked to blank 1 by the data stack feeder 3.
will be peeled off one by one. The blank 1 held by the stack feeder 3 and peeled off from the stack 2 is sent onto the entry table 5 of the shear device B, which is the next station. next,
Blank 1 includes two sets of shears 7 of shear device B,
8, it is cut according to the size, weight, shape, etc. of the article to be molded. This cutting is performed in the longitudinal direction by a shear and in the transverse direction by a shear, so that the cut is made in accordance with the molded product.

The cut blanks 1 are sequentially sent on the output table 6 and automatically transferred to the conveyor 10 of the heating device C.
moved above.

In the above, the rear end of the blank 1 that has already been sent forward and the front end of the following blank 1 can be joined and connected by the blank joining device 9. By joining in this manner, the blank can be continuously cut without producing any scraps.

The blanks 1 transferred onto the conveyor 10 of the heating device C are preheated to a predetermined temperature while being sequentially conveyed by the conveyor 10. If the stacking mechanism is incorporated on the output side of the heating device C as shown in the figure,
The preheated blank 1 is transported in the line direction by a pro-leader 20 and placed on a table 21.
The table 21 is transported in the direction perpendicular to the line by the
superimposed on top. This stacking operation of the blanks 1 is performed so that the stacked appearance changes depending on the shape of the product to be molded, for example, when the thickness changes are large or the product is complex.

The blanks 1 stacked in a predetermined shape are sent into a press D by a loader 15 while being kept warm.
Pressure is applied by press D, and the molding is completed by cooling. The molded product is taken out from the press D by an unloader 17 and transferred to a conveyor 18. The products on conveyor 18 will be stored on pallets 22.

Although the continuous production equipment of the present invention has been described above, it is not limited to the illustrated and described embodiments.
It may be installed at the entrance side of the heating device C, and after the blanks cut by the shear device B are stacked on top of each other, the blanks are put into the heating furnace 11. If you do this,
There are advantages such as the fact that the length of the heating furnace can be shortened because the blanks are heated in a stacked state, and handling is easy because the blanks are stacked at room temperature. It goes without saying that other changes may be made without departing from the gist of the present invention.

As described above, according to the continuous production equipment of the present invention, (i) independent equipment having various functions necessary for molding is combined with a feeding device, so production can be performed automatically and continuously; I can do it.

(ii) Since the dimensions of the material fed to the line can always be constant regardless of the weight, shape, etc. of the product to be molded, feeding to the line is simple and cumbersome.

(iii) Since it has many degrees of freedom, such as being able to cut to any size with a shear built into the line, it is possible to produce a wide variety of products and in large quantities.

(iv) A fully automatic line allows for small number of people to control the process, resulting in labor savings.

(v) Furthermore, by combining the shear device with a blank stacking mechanism, the amount and position of blanks fed into the press mold can be freely controlled according to the shape of the product, resulting in the production of high-precision, high-quality products. is possible.

It can produce excellent effects such as

[Brief explanation of the drawing]

FIG. 1 is an explanatory plan view of the continuous production equipment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is an explanatory side view of conventional molding equipment. A... Crane saver, B... Shear device, C
...Heating device, D...Press, 1...Blank,
2...Stack, 3...Day stack feeder,
7,8...Sear, 10...Conveyor, 11...
Heating furnace, 15... Loader, 16... Molded product, 17
...Unloader.

Claims (1)

[Claims] 1. A device is provided to supply the blanks obtained by cutting the thermoplastic resin material into a fixed size regardless of the shape of the molded product to the molding line one after another from outside the molding line, and the supply device supplies the blanks to the molding line. At least two cutting machines are used to cut the blank into various sizes and shapes according to the shape and size of the molded product.
A set of shear devices, a device for heating the cut blank, and a press for press-forming the heated blank are provided along the forming line, and a feeding mechanism is arranged between each of the above-mentioned devices. Continuous production equipment for thermoplastic resin.