JPS6359851B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a film width direction positioning device for a transfer molding apparatus. A transfer molding device is a device in which a plastic transfer film is inserted between the molds of an injection molding machine, and a pattern previously printed on the transfer film is transferred to a molded product at the same time as molding. In particular, the present invention relates to an apparatus for positioning a transfer film in the width direction with respect to a forming part before molding, and at the same time correcting the inclination of the transfer film.

(b) Prior Art The positioning of a transfer film in conventional transfer molding was performed as follows. That is, by sending out the transfer film from the coil by a feeding roll device and stopping the feeding roll device when the pattern reaches a predetermined transfer position,
Position the transfer film in the longitudinal direction. Further, positioning of the transfer film in the width direction is carried out by mounting the upstream feed roll device and the downstream constant tension device on an integrated frame, and moving the frame in the width direction of the transfer film. Whether the transfer film is at a predetermined position in the longitudinal direction and the width direction is detected by reading marks on the transfer film using a longitudinal direction sensor and a width direction sensor. However, in such a conventional transfer molding apparatus, although the position of the transfer film in the longitudinal direction and the width direction can be adjusted, if the transfer film is tilted, it cannot be corrected. The main causes of the inclination of the transfer film are poor parallelism of the guide rolls and errors in the shape of the transfer film itself. The latter error in the shape of the transfer film itself occurs during the printing process of the transfer film,
At present, it is difficult to completely prevent the occurrence. Therefore, even if the parallelism of the guide rolls is adjusted with very high precision, it is difficult to prevent the transfer film from tilting. Incidentally, as shown in Japanese Patent Application No. 125392/1983 (Japanese Patent Application No. 18323/1983), a jump device for temporarily separating the push roll of the feed roll device from the drive roll can be provided; The device has a function of preventing the slant of the transfer film from accumulating, but cannot eliminate the slant itself.

(C) Object of the Invention The object of the present invention is to provide a film width direction positioning device for a transfer molding apparatus, which is capable of correcting the inclination of the transfer film at the same time as positioning the transfer film in the width direction.

(d) Structure of the Invention The present invention achieves the above object by making it possible to independently adjust the feed roll device disposed on the upstream side and the constant tension device disposed on the downstream side in the width direction of the transfer film. achieve. That is, the film width direction positioning device of the transfer molding apparatus according to the present invention includes a feeding roll device attached to a first frame movable in the film width direction disposed at one end of the mold, and a film width direction positioning device of the first frame. A first frame drive device that adjusts the directional position, and a second frame drive device that is movable in the film width direction and is disposed on the other end side of the mold.
a constant tension device attached to the frame;
a second frame driving device that adjusts the position of the second frame in the film width direction; and a first frame drive device that is provided at one end of the mold and is capable of detecting the width direction mark of the transfer film.
The width direction sensor, the second width direction sensor provided at the other end of the mold and capable of detecting the width direction mark of the transfer film, and the first width direction sensor always detect the width direction mark of the transfer film. a controller that outputs a signal for operating the first frame drive device and outputs a signal for operating the second frame drive device so that the second width direction sensor always detects the width direction mark of the transfer film; have.

(E) Embodiments Hereinafter, embodiments of the present invention will be described with reference to Nos. 1 and 2 of the attached drawings.
This will be explained based on the diagram.

The transfer molding apparatus is shown in FIGS. 1 and 2. Frame 31
A movable platen 34 is guided by tie bars 33 attached to a fixed platen 32 fixed above.
The movable platen 34 is movably supported on the pedestal 31 by rollers 35. Fixed type 3 on fixed platen 32
6 is installed. The fixed mold 36 has a convex portion 36' on its parting surface side. Molten resin can be injected into the fixed mold 36 from an injection nozzle 39. A movable mold 40 is attached to the movable platen 34. The movable mold 40 is connected to the convex portion 3 of the fixed mold 36.
It has a recess 40' corresponding to 6'. Convex part 3
6' and the recess 40' constitute a molded part.
When the fixed mold 36 is closed, the bush 42 of the movable mold 40
It has a guide pin 43 that fits (see FIG. 2). A first frame 60 is mounted on the upper part of the movable platen 34.
is mounted so that it can be moved horizontally. That is, the first frame 60 has two guides 6 with respect to the guide rail 61 attached to the movable platen 34.
Guided by 2. The guide 62 is a direct-acting slide bearing. The first frame 60 can be moved in the horizontal direction by a first frame drive device 93 shown in FIG. That is,
The motor 63 of the first frame drive device 93 is connected to a ball screw 67.
is engaged with a nut attached to the first frame 60. Therefore, by rotating the motor 63, the first frame 60 can be moved in the horizontal direction. The first frame 60 is provided with a roller that supports the coil 69, a feeding roll device 200 that feeds out the transfer film 71 from the coil 69, and the like. The feed roll device 200 includes a drive roll 73 driven by a motor 76 and a push roll 72 pressed against the drive roll 73 by a spring force. Although the push roll 72 is configured to be able to temporarily release the pressing state against the drive roll 73 by the jump device 100, the jump device 100
A detailed explanation will be omitted. The first frame 60 further includes a guide roll 70 and a guide roll 70.
8 and a guide bar 80 are provided, and the transfer film 71 is guided by these. The guide rolls 70 and 78 have collars 70a and 78a, respectively, which prevent the transfer film 71 from moving in the width direction. Also, the first
A longitudinal sensor 83 is provided on the frame 60. The longitudinal direction sensor 83 detects a longitudinal direction mark 8 printed on the transfer film 71 in advance.
This is an optical sensor that detects the position of 5. The longitudinal marks 85 are provided at predetermined intervals in the longitudinal direction of the transfer film 71. Movable plate 34
A second frame 50 is attached to the lower part of the frame 50 so as to be movable in the horizontal direction. That is, the second frame 50 is guided by two guides 52 with respect to a guide rail 51 attached to the movable platen 34. The guide 52 is a direct-acting slide bearing. The second frame 50 can be moved in the horizontal direction by a second frame drive device 53 shown in FIG. That is, the motor 54 of the second frame drive device 53 is connected to a ball screw 55, and this ball screw 55 is connected to the second frame 50.
It is interlocked with the nut attached to the. Therefore, by rotating the motor 54, the second frame 50 can be moved in the horizontal direction.
The second frame 50 is provided with a constant tension device 204 and a tension roll device 202. The tension roll device 202 includes a drive roll 75 and a push roll 74. The constant tension device 204 is composed of dancer rolls 77, which can apply a constant tension to the transfer film 71. The second frame 50 further includes a guide bar 81 and a guide roll 79.
A guide roll 206 is provided to guide the transfer film 71. The transfer film 7 is placed on the guide roll 79.
1 is provided with a collar 79a that prevents movement in the width direction. As shown in FIG. 2, the upper part of the movable mold 40 is provided with a first width direction sensor 57, and the lower part of the movable mold 40 is provided with a second width direction sensor 58. Both the first width direction sensor 57 and the second width direction sensor 58 are optical sensors that detect the width direction mark 84 printed on the transfer film 71 in advance. The width direction marks 84 are provided at fixed positions in the width direction and are continuous in the longitudinal direction. Longitudinal direction sensor 83, first width direction sensor 57 and second width direction sensor 5
The signal from 8 is input to the controller 59 through wiring not shown. The controller 59 outputs a signal to control the operation of the motor 76, the motor 63, and the motor 54, as described later.

Next, the operation of this embodiment will be explained. 1st
The figure shows the mold in its open state. In this state, the motor 76 operates, the drive roll 73 rotates, and the transfer film 71 is sent in the longitudinal direction. When the transfer film 71 is fed a predetermined amount, the longitudinal direction mark 85 of the transfer film 71 is detected by the longitudinal direction sensor 8.
3, and the operation of the motor 76 is stopped by a command from the controller 59. By doing this, the transfer film 71 is positioned in the longitudinal direction. After longitudinal positioning, the first frame 60 and the second frame 50 are moved by simultaneously operating the motor 63 and the motor 54.
The transfer film 71 is moved independently.
Positioning in the width direction and adjustment of inclination are performed. That is, the motor 63 moves the first frame 60 based on the signal from the controller 59 so that the first width direction sensor 57 always detects the width direction mark 84 of the transfer film 71. Similarly, the motor 54 also controls the second width direction sensor 58 based on the signal from the controller 59.
The second frame 50 is moved so as to detect the No. 1 width direction mark 84. Therefore, the width direction mark 84 of the transfer film 71 is held so as to always pass through the position of the first width direction sensor 57 on the upper part of the movable mold 40 and the position of the second width direction sensor 58 on the lower part of the movable mold 40. be done. In this state, the widthwise position of the pattern on the transfer film 71 is adjusted by the movable mold 40.
It is arranged so that the position in the width direction of the molded part (recessed part 40') matches the position of the molded part (recessed part 40'), and the orientation of the pattern with respect to the molded part also matches (that is, the transfer film 71 is not tilted). . Note that during the positioning operation, the constant tension device 204
applies a constant tension to the transfer film 71, so that the transfer film 71 does not loosen. In this way, the longitudinal direction positioning of the transfer film 71,
When the width direction positioning and inclination adjustment are completed, the movable platen 34 moves from left to right in FIG. 1, and a mold clamping operation is performed. Next, molten resin is injected from the injection nozzle 39, and at the same time as molding is performed, the design on the transfer film 71 is transferred to the molded product. After the molding operation is completed, the mold is opened, the transfer film 71 is peeled off from the molded product, and then the molded product is ejected. By this 1
After the molding cycle is completed, the next cycle is started, the transfer film 71 is fed again by a predetermined amount, and the positioning and inclination are corrected in the same manner as in the previous case.

As described above, in this injection molding apparatus, in addition to the longitudinal positioning and width direction positioning of the transfer film 71, the inclination of the transfer film 71 is also adjusted, so that the design of the transfer film 71 is placed in the molding part. Since the molding is performed in a state in which the moldings are in exact agreement with each other, very precise transfer molding can be performed with extremely high precision.

(F) Effects of the Invention As explained above, the film width direction positioning device of the transfer molding apparatus according to the present invention has a feeding mechanism attached to a first frame movable in the film width direction disposed at one end of the mold. a feed roll device, a first frame drive device for adjusting the position of the first frame in the film width direction, and a constant tension device attached to a second frame movable in the film width direction disposed on the other end side of the mold. , a second frame driving device for adjusting the position of the second frame in the film width direction, a first width direction sensor provided at one end of the mold and capable of detecting the width direction mark of the transfer film, and the other end of the mold. a second width direction sensor provided on the side and capable of detecting the width direction mark of the transfer film; and a signal for operating the first frame driving device so that the first width direction sensor always detects the width direction mark of the transfer film. and a controller that outputs a signal for operating the second frame driving device so that the second width direction sensor always detects the width direction mark of the transfer film. At the same time as positioning, the inclination of the transfer film is also corrected, making it possible to obtain highly accurate transfer molded products. Therefore, precise transfer molding of large molded products is also possible. Furthermore, there is no need to strictly adjust the parallelism of the guide rolls. Furthermore, since the first frame to which the film feeding device is attached and the second frame to which the constant tension device is attached are separated, installation and removal operations are easy and work time is significantly reduced. be able to.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a transfer molding apparatus to which a film width direction positioning device for a transfer molding apparatus according to the present invention is applied, and FIG. 2 is a view of FIG. 1 taken along the - line. 31... Frame, 32... Fixed plate, 33... Tie bar, 34... Movable plate, 35... Roller, 36...
... Fixed type, 39 ... Injection nozzle, 40 ... Movable type, 42 ... Bush, 43 ... Guide pin, 5
0... Second frame, 51... Guide rail, 52
... Guide, 53 ... Second frame drive device, 5
4... Motor, 55... Ball screw, 57... First width direction sensor, 58... Second width direction sensor, 59... Controller, 60... First frame, 6
1... Guide rail, 62... Guide, 63... Motor, 67... Ball screw, 69... Coil, 7
0... Guide roll, 71... Transfer film,
72... Push roll, 73... Drive roll, 74
... Push roll, 75 ... Drive roll, 76 ...
Motor, 79... Guide roll, 80... Guide bar, 81... Guide bar, 83... Longitudinal direction sensor, 84... Width direction mark, 85... Longitudinal direction mark, 93... First frame drive device, 10
0... Jump device, 200... Feeding roll device, 202...... Tension roll device, 204... Constant tension device.

Claims (1)

[Claims] 1. A feed roll device attached to a first frame movable in the film width direction disposed at one end of the mold, a first frame drive device for adjusting the position of the first frame in the film width direction, and A second film movable in the film width direction located on the other end side.
a constant tension device attached to the frame;
a second frame driving device that adjusts the position of the second frame in the film width direction; and a first frame drive device that is provided at one end of the mold and is capable of detecting the width direction mark of the transfer film.
The width direction sensor, the second width direction sensor provided at the other end of the mold and capable of detecting the width direction mark of the transfer film, and the first width direction sensor always detect the width direction mark of the transfer film. a controller that outputs a signal for operating the first frame drive device and outputs a signal for operating the second frame drive device so that the second width direction sensor always detects the width direction mark of the transfer film; A film width direction positioning device for a transfer molding device comprising: