JPH04363217A - Apparatus and method for correcting position of sheet in molding machine - Google Patents

Abstract

PURPOSE:To prevent a sheet from slipping with respect to a molding, moreover, improve the work efficiency in the molding period by enabling the sheet to be disposed positively in a predetermined position. CONSTITUTION:When a molding 30 with a sheet 7 is molded, the sheet 7 is mounted on a mounting table 15 and on the mounting table 15, the position of the sheet 7 is measured and thereby the slippage between the position of the sheet 7 and the sheet reference position set previously is calculated, and after the slippage of the sheet 7 is corrected, the sheet 7 corrected in slippage is transfer-disposed to a predetermined position of the mold by means of a transferring device 20.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is an object of the present invention when molding a molded article made of synthetic resin, etc., by using a sheet in a molding machine that can reliably place a sheet having a pattern, etc. at a predetermined position in a mold. The present invention relates to a position correction device and method thereof.

0002

2. Description of the Related Art Conventionally, as shown in FIG. 7, a container 50 made of synthetic resin such as plastic has a sheet 51 integrally provided with a decorative pattern, characters, etc. printed in color on its surface. be. The sheet-equipped container 50 is
An operator artificially attaches the sheet to a predetermined position in the released mold, closes the mold with the sheet 51 attached, and injects a synthetic resin raw material into the mold. ,
Currently, it is being molded.

0003

[Problems to be Solved by the Invention] However, in the conventional means for molding the container 50, since the work of attaching the sheet 51 to the mold is done manually, it is difficult to attach all the sheets 51 to the mold. It is difficult for the sheet 51 to adhere to a predetermined position, and the sheet 51 may shift and become uneven, causing the container 5
There was a problem that it was not possible to achieve uniformity of 0.

[0004] Furthermore, when placing the sheet at a predetermined position in the mold, an operator must perform positioning, resulting in extremely poor work efficiency.

The present invention has been made in view of the above-mentioned conventional problems, and it is possible to securely place a sheet at a predetermined position in a mold and prevent the sheet from shifting with respect to a molded product. It is an object of the present invention to be able to prevent this problem while also improving work efficiency during molding.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has been made as a sheet position correction device and method for a molding machine. That is, the feature of the sheet position correction device in a molding machine is that a sheet 7 having a pattern or the like is placed inside the molds 3 and 5, and raw materials such as synthetic resin are placed inside the closed molds 3 and 5. In the molded product 30 with a sheet 7 attached by injection of Then, the amount of deviation between the position of the sheet 7 measured by the measuring means and a preset sheet reference position is calculated, and the mounting table 15 is moved so that the sheet 7 matches the sheet reference position. It is equipped with a calculation device 19 and a transfer device 20 that transfers and arranges the sheet 7 that matches the sheet reference position to a predetermined position within the molds 3 and 5.

[0007] Also, the feature of the sheet position correction device in a molding machine is that a sheet 7 having a pattern or the like is placed in the molds 3 and 5, and a synthetic resin is placed in the closed molds 3 and 5. By injecting raw materials such as
0, a mounting table 15 on which the sheet 7 is placed, a measuring means for measuring the position of the sheet 7 on the mounting table 15, and a position of the sheet 7 measured by the measuring means. a calculation device 19 that calculates the amount of deviation between the sheet reference position and a preset sheet reference position; and a mounting table 1 for the sheet 7.
A transfer device 20 is provided which can correct the amount of deviation obtained by the arithmetic device 19 during transfer from the mold 5 to the molds 3 and 5.

Furthermore, the method for correcting the position of a sheet in a molding machine is characterized in that a sheet 7 having a pattern or the like is placed inside the molds 3 and 5, and a synthetic resin is placed inside the closed molds 3 and 5. By injecting raw materials such as
0, after placing the sheet 7 on the mounting table 15 and measuring the position of the sheet 7 on the mounting table 15, the position of the sheet 7 and the preset reference position of the sheet 7 are determined. After calculating the amount of deviation from the sheet 7 and aligning the sheet 7 with the reference sheet position, the corrected sheet 7 is placed in the mold 3.
, 5 at a predetermined position.

[0009]

Accordingly, in the apparatus according to claim 1, the sheet 7 is placed on the mounting table 15, and its position on the mounting table 15 is measured. The calculation device 19 compares the seat reference position with a preset sheet reference position stored in the storage device 18 and calculates the amount of deviation between the two. The mounting table 15 is moved in an appropriate direction according to the amount of deviation calculated by the calculation device 19, and the position of the sheet 7 matches the sheet reference position.

The sheet 7 that matches the sheet reference position is reliably placed at a predetermined position within the molds 3 and 5 via the transfer device 20 without shifting.

Furthermore, in the apparatus according to the second aspect of the present invention, similarly to the first aspect, the arithmetic unit 19 calculates the relationship between the position of the sheet 7 on the mounting table 15 and the sheet reference position stored in the storage device 19. Calculate the amount of deviation. The amount of deviation of the sheet 7 is corrected by the transfer device 20 when the sheet 7 is transferred from the mounting table 15 into the molds 3 and 5 via the transfer device 20, so that the sheet 7 matches the sheet reference position. 7 is installed at a predetermined position within the molds 3 and 5.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 indicates a plastic molding machine, which includes a concave mold 3 as a fixed mold provided on the upper surface of a molding machine main body 2, and a convex mold 5 as a movable mold.

Reference numeral 7 denotes a sheet made of a synthetic resin film on which a pattern 7a or the like is printed, and as shown in FIGS. 5 and 6, a plurality of sheets are set on a sheet feeding device 8 in the form of a bundle. The sheet feeding device 8 includes an apparatus main body 9 on which the sheet 7 is placed, a main suction body 10 that comes into contact with the center of the upper surface of the sheet 7 from above and is capable of suctioning the sheet 7, and the main suction body 10. A plurality of separation adsorbents 11 are located on the outside of the sheet 7 to adsorb the outer periphery of the sheet 7, and are rotatable upward and toward the center of the sheet 7 using a cam mechanism around the center position O.
It is equipped with Note that the rotational center position O of each separation adsorption body 11 is located below the upper surface of the uppermost sheet 7, and the separation adsorption body 11 is located below the main adsorption body 10.
The sheet 7 is pressed against the sheet 7 by suction on the outer periphery of the sheet 7, and when each separation suction body 11 rotates, the sheet 7 is bent upward and separated without being stretched.

Further, the main adsorbent 10 and the separating adsorbent 11 can lift the sheet 7 in a bent state, then turn it over and supply it to the sheet position correcting means 13 side. Reference numeral 14 denotes a plurality of claws for pressing the edges of the upper surface of the sheets 7 in a bundle, and are provided so as to be movable in and out of the sheets 7.

As shown in FIG. 2, the sheet position correcting means 13 is for correcting the position of the sheet 7 fed by the sheet feeding device 8 to a predetermined position. A mounting table 15 made of a copper plate that is movable and rotatable in the direction of arrow A, and a plurality of conductive sheet edge detection rollers 16 (measuring means) that roll outward on the mounting table 15. We are prepared. Each roller 16 and the mounting table 15 are in an insulated state when the roller 16 rolls on the sheet 7 placed on the mounting table 15,
When each roller 16 comes into contact with the mounting table 15, both are energized.

Reference numeral 18 denotes a storage device in which a preset seat reference position is stored. Reference numeral 19 denotes a calculation device that measures the position of the sheet 7 by energizing each of the rollers 16 and the mounting table 15, and compares the position of the sheet 7 with the sheet reference position stored in the storage device 18. This is for comparing and calculating the amount of deviation of the sheet 7 from the sheet reference position.

The computing device 19 is connected to a plurality of drive motors (not shown) for moving the mounting table 15, and each drive motor moves the sheet 7 on the mounting table 15 according to a signal from the computing device 19. The mounting table 15 is appropriately moved so that the position matches the sheet reference position. 20 is the mounting table 15
This is a transfer device for sucking the sheet 7 whose upper position has been corrected, and transferring and disposing it at a predetermined position on the inner surface of the concave mold 3. The sheet 7 transferred to the concave mold 3 by the transfer device 20 adheres to the concave mold 3 due to its static electricity. Furthermore, since the transfer device 20 repeatedly performs a predetermined movement, each sheet 7 that has been aligned by the sheet position correction means 13 can be reliably placed at a predetermined position in the concave mold 3.

The embodiment of the present invention has the above-mentioned configuration, and an example of its use will be explained next. First, after setting the sheets 7 in a bundle on the main body 9 of the sheet feeding device 8, the main adsorption body 10 and the separation adsorption body 11 are lowered, and the main adsorption body 10 and the separation adsorption body 11 are stacked on the sheet. 7 (see Fig. 5).

Next, by rotating each separating adsorbent 11, the outer circumference side of the uppermost sheet 7 is bent, and the claws 14 are advanced to fix the outer circumference of the sheet 7 (see FIG. (see 6). In addition, at this time, each separation adsorbent 11 is
Since it rotates around the center position O below the seat 7, its rotation locus shifts toward the center of the seat 7, and the seat 7 is not stretched.

Furthermore, after lifting the sheet 7 by raising the main adsorbent 10 and the separating adsorbent 11, the sheet 7 is turned over and placed on the mounting table 15 of the sheet position correcting means 13.
Place it on. When the sheet 7 is placed on the mounting table 15, each sheet edge detection roller 16 is lowered, and after contacting the upper surface of the sheet 7, each sheet edge detection roller 16 rolls on the sheet 7 in an outward direction. do. At this time, each sheet edge detection roller 16 and the mounting table 15 are in an insulated state because the sheet 7 is interposed between them.

The sheet edge detection roller 16 is electrically connected to the mounting table 15 when the peripheral edge of the sheet 7 passes, and the position of the sheet 7 is measured based on the position of the roller 16 at this time. Further, the calculation device 19 compares the position of the seat 7 with the seat reference position stored in the storage device 18 and calculates the amount of deviation between the two, so that the position of the seat 7 matches the reference position. The drive motor of the seat position correction device 13 is operated to move the mounting table 15 in the X direction, Y direction, and rotationally. Next, the sheet 7 that has been aligned with the sheet reference position is sucked by the suction section of the transfer device 20, and the transfer device 20 transfers the sheet 7 to a predetermined position on the inner surface of the concave mold 3 and brings it into contact with the inner surface of the concave mold 3. The sheet 7 adheres to the concave mold 3 due to its static electricity and does not fall off (see FIG. 3).

Further, the convex mold 5 is advanced into the concave mold 3 with the sheet 7 attached thereto, and after the mold is closed, the plastic raw material is injected into the mold, and the sheet 7 is integrally provided at a predetermined position. Object 30 is formed (see FIG. 4). Incidentally, in the above embodiment, the sheet 7 is brought into alignment with the sheet reference position by moving the mounting table 15; however,
In the transfer device 20 that transfers the unaligned sheet 7 from the mounting table 15 to the mold, the position of the sheet 7 may be corrected. That is, the amount of deviation between the position of the sheet 7 detected on the mounting table 15 and the sheet reference position is calculated in the calculation device 19, and the suction portion of the transfer device 20 is moved to the concave mold 3 as shown by the imaginary line in FIG. This configuration corrects the amount of deviation of the sheet 7 by appropriately moving it just before adhering it.

Further, although the configuration has been exemplified in which the position of the sheet 7 is detected by energizing the sheet edge detection roller 16 and the mounting table 15, the present invention is not limited to this. It is also possible to detect the position of 7. In addition, the members constituting the present invention are not limited to the above embodiments, and, for example, the material of the sheet 7 and its shape can be arbitrarily set. Also,
As shown by the imaginary line in FIG. 6, an air jet nozzle 33 may be provided outside the sheet 7 to jet air when the sheet 7 is adsorbed by the separation adsorbent 11. In this case, the uppermost sheet 7 and the next sheet 7 can be separated more reliably.

[0024]

[Effects of the Invention] As described above, the present invention aligns the sheet with the sheet reference position on the mounting table, and then arranges it in the mold, or transfers the sheet on the mounting table to the mold using a transfer device. Since the configuration allows the sheet to match the sheet reference position, it is possible to reliably arrange each sheet at a predetermined position in the mold, and it is possible to prevent the sheet from being misaligned with respect to the molded product.

Moreover, the apparatus of the present invention can automate a series of molding operations, and can improve work efficiency compared to the conventional method of manually disposing sheets in molds. There is an advantage.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing seat position correction means.

FIG. 3 is a sectional view showing a mold release state of the mold.

FIG. 4 is a sectional view showing the mold in a closed state.

FIG. 5 is a front view of the sheet feeding device before sheet suction.

FIG. 6 is a front view of the sheet feeding device during sheet suction.

FIG. 7 is a perspective view showing a conventional example.

[Explanation of symbols]

3 concave type, 5 convex type, 7 sheet, 15 mounting table, 16 sheet edge detection roller (measuring means), 1
9 arithmetic device, 20 transfer device.

Claims (3)

[Claims] [Claim 1] A sheet 7 having a pattern or the like is placed in the molds 3, 5, and a raw material such as a synthetic resin is injected into the closed molds 3, 5. In an apparatus for forming a molded article 30, a mounting table 15 on which the sheet 7 is placed, a measuring means 16 for measuring the position of the sheet 7 on the mounting table 15, and a sheet measured by the measuring means. a calculation device 19 that calculates the amount of deviation between the position of the sheet 7 and a preset sheet reference position and moves the mounting table 15 so that the sheet 7 matches the sheet reference position;
A sheet position correction device for a molding machine, comprising a transfer device 20 that transfers and arranges the sheet 7 that matches the sheet reference position to a predetermined position in the molds 3 and 5. [Claim 2] By disposing a sheet 7 having a pattern or the like in the molds 3 and 5 and injecting a raw material such as a synthetic resin into the closed molds 3 and 5, the sheet 7 is attached. In an apparatus for forming a molded article 30, a mounting table 15 on which the sheet 7 is placed, a measuring means 16 for measuring the position of the sheet 7 on the mounting table 15, and a position measured by the measuring means 16. A calculation device 19 calculates the amount of deviation between the position of the sheet 7 and a preset sheet reference position, and a calculation device 19 that calculates the amount of deviation between the position of the sheet 7 and a preset sheet reference position, and a calculation device 19 that calculates the amount of deviation between the position of the sheet 7 and a preset sheet reference position. 1. A sheet position correction device in a molding machine, characterized in that it is equipped with a transfer device 20 capable of correcting the amount of deviation. [Claim 3] A sheet 7 having a pattern or the like is placed in the molds 3 and 5, and a raw material such as a synthetic resin is injected into the closed molds 3 and 5. When molding the molded product 30, the sheet 7 is placed on the mounting table 15, and after measuring the position of the sheet 7 on the mounting table 15, the position of the sheet 7 and the preset position of the sheet 7 are determined. A molding machine characterized in that after calculating the amount of deviation from a reference position and aligning the sheet 7 with the reference sheet position, the corrected sheet 7 is placed at a predetermined position in the molds 3 and 5. How to correct the position of the sheet.