JPH0321959Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a vertical transfer foil feeding device, and more specifically, it is used to mold transfer foil in the so-called molding and simultaneous painting method, which performs transfer printing on the surface of plastic at the same time as molding the plastic. This invention relates to a vertical transfer foil feeding device that automatically feeds transfer foil into a mold.

There is a method called the simultaneous molding and painting method as a method for producing painted plastic molded products. This method involves installing a transfer foil into the mold of an injection molding machine before filling it with molding resin, then closing the mold and filling it with molten molding resin. This method performs transfer printing by transferring the design of the transfer foil onto the surface at the same time as the molding process.

Conventionally, in carrying out this method, various transfer foil feeding devices have been devised for mounting the transfer foil into the molding die. The present invention was completed as a result of various research and considerations in an effort to obtain a transfer foil feeding device that can guide the transfer foil into a molding die without causing any misalignment. That is, the present invention includes a support frame part 2 that supports a roll-shaped transfer foil 1, and a drive roller 4 that intermittently feeds the transfer foil 1 supported by the support frame part 2 into a molding die 3 one pitch at a time. , a press roller 5 that circumscribes the drive roller 4 and prevents the transfer foil 11 running on the drive roller 6 from slipping, and a tension roller 6 that pulls the transfer foil 1 after the transfer printing process is wound up. , a presser roller 7 which is mounted on the tension roller 6 and prevents the transfer foil 1 from slipping while running on the tension roller 6, and the drive roller 4 and the tension roller 6.
and two guide rollers 8 that guide the transfer foil 1 to an appropriate position within the molding die 3 between the guide rollers 8 and 8, which are provided on the transfer foil 1 immediately before the transfer foil 1 is guided into the molding die 3. A photo sensor 9 detects the registered mark and outputs a rotation or stop signal to the drive roller 4 and the tension roller 6, and a dancer roller 10 adjusts the tension of the transfer foil 1 immediately before the tension roller 6. This is a vertical transfer foil feeding device.

Hereinafter, the present invention will be explained in detail based on the drawings.

First, a support frame part 2 having a removable support shaft 13 near its tip is provided at an arbitrary part in front of or above the mold mounting part 12 of the mold mounting base 11 of an injection molding machine. ing. This support frame portion 2 is formed to be able to support the roll-shaped transfer foil 1.

The support frame portion 2 is provided with a drive roller 4 for feeding the transfer foil 1 supported by the support shaft 13 into the molding die 3. The drive roller 4 is driven so as to intermittently feed the transfer foil 1 into the mold 3 one pitch at a time, so that the pattern portion formed on the transfer foil 1 reaches a predetermined position in the mold 3. After the transfer printing process is completed, the transfer foil 1 is sent to the next pattern position. In the molding and painting method,
In order to accurately stop the transfer foil 1 when the pattern formed on the transfer foil 1 reaches a predetermined position in the mold 3, the drive roller 4 is provided with a mechanical brake mechanism. , it can be stopped instantly. The rotation and stopping of the drive roller 4 is performed by output signals from a photo sensor 9 and an injection molding machine, which will be described later.

Note that a mechanical guide (not shown) is used to prevent the transfer foil 1 from shifting in the lateral direction when it is guided into the molding die 3.

A presser roller 5 is provided in circumferential contact with the drive roller 4 to prevent the vertical transfer foil 1 running on the drive roller 4 from slipping.

On the other hand, a tension roll 6 is provided behind or below the mold attachment part 12 for pulling the transfer foil 1 that has been subjected to transfer printing within the mold 3. This tension roller 6 is configured to rotate and stop in synchronization with the drive roller 4.
In addition, this tension roller 6 has a built-in one-way clutch, and the transfer foil 1 that has finished the transfer printing process is
is prevented from being drawn into the molding die 3.

The transfer foil 1 which has been subjected to transfer printing and has been stretched by the tension roll 6 may be wound up by an appropriate means such as a winding roll (not shown).

A press roller 7 is also provided in circumferential contact with the tension roller 6 to prevent the transfer foil 1 running on the tension roller 6 from slipping.

A guide roller 8 is provided between the drive roller 4 and the molding die 3, and between the molding die 3 and the tension roller 6, respectively, and the transfer foil 1 is moved between the molding die 3 and the transfer foil 1.
It is configured to guide the user to the appropriate location within the device. This guide roller 8 is supported by a guide roller support section 14. This guide roller support part 1
4 is a molding tool that can be easily adjusted with bolts 15 so that the transfer foil 1 is always guided to an appropriate position relative to the molding mold 3 even when the molding mold 3 is replaced. It is fixed to the mold mount 11 (adjustable in the left and right directions in the figure).

The photo sensor 9 is provided just before the transfer foil 1 is guided into the molding die 3. The photo sensor 9 detects the register mark provided on the transfer foil 1 and outputs a signal to the drive roller 4, thereby stopping the transfer foil 1 at a predetermined position within the molding die 3. It is configured as follows.

The dancer roller 10 is provided immediately before the tension roller 6 and has the function of adjusting the tension of the transfer foil 1. This dancer roller 10 is movable under its own weight (in the vertical direction in the figure), and plays a role of absorbing slack in the transfer foil 1 especially when the transfer foil 1 is stopped.

If the present invention is a vertical transfer foil feeding device having the configuration described above, the transfer foil can be guided automatically and smoothly into the molding die, and the tension adjustment, positioning, etc. of the transfer foil can be carried out automatically and smoothly. It's completely unnecessary. Also, when replacing the mold,
The position of the transfer foil within the molding die can be easily adjusted by simply adjusting the position of the guide roll support section.

Therefore, by attaching this to an injection molding machine, it is possible to perform decoration at the same time as molding with high production efficiency and without problems such as misalignment of designs, and it is possible to easily produce plastic molded products with beautiful decorations in large quantities. It can be manufactured to

Furthermore, the present invention can be applied not only to transfer foils but also to feeding insert films into injection molding machines, and thus the present invention has extremely high practical value.

[Brief explanation of the drawing]

FIG. 1 shows a schematic diagram of a vertical transfer foil feeding device according to the present invention. In the figure, 1... transfer foil, 2... support frame part,
3...Molding mold, 4...Drive roller, 5...Press roller, 6...Tension roller, 7...Press roller, 8...Guide roller, 9...Photo sensor, 10...Dancer roller, 11 ... Molding die mounting base, 12... Molding die mounting portion, 13... Support shaft, 14... Guide roller support portion, 15... Bolt.

Claims (1)

[Scope of utility model registration request] a support frame portion that supports a roll-shaped transfer foil; a drive roller that intermittently sends out the transfer foil supported by the support frame portion into a molding die one pitch at a time; and a drive roller that is in circumscribed contact with the drive roller. A press roller that prevents the transfer foil running thereon from slipping, a tension roller that pulls the transfer foil after the transfer printing process is wound up, and a transfer foil that circumscribes the tension roller and runs on the tension roller. A press roller that prevents slippage, two guide rollers that guide the transfer foil to an appropriate position within the molding mold between the driving roller and the tension roller, and a guide roller that guides the transfer foil into the molding mold. a foot sensor that detects a register mark provided on the transfer foil just before the transfer foil is transferred and outputs a rotation or stop signal to the drive roller and the tension roller; and a dancer roller that adjusts the tension of the transfer foil immediately before the tension roller. A vertical transfer foil feeding device characterized by comprising: