JPS6359852B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a mold for a transfer molding device.

(b) Prior art A transfer film made of plastic, for example, is inserted between the molds of an injection molding machine in a transfer molding device, and a pattern previously printed on the transfer film is transferred to the molded product at the same time as molding. It is a device. In conventional transfer molding devices, the transfer film is fed by a predetermined amount, positioned at a predetermined position, and then the mold is clamped, but no special clamping device for fixing the transfer film is provided at this time.

(C) Problems to be Solved by the Invention As mentioned above, the conventional transfer molding apparatus is not equipped with a clamping device, so when the transfer film is inserted between the molds, the position of the pattern may be misaligned. There was a problem. In order to solve these problems, Japanese Patent Application No. 58-37492
No. 58-37492) (filed on March 9, 1982, and therefore not published at the time of this application) discloses a transfer molding apparatus having a clamp device for fixing a positioned transfer film. By doing so, displacement of the transfer film during mold clamping can be prevented, and more precise transfer molding can be performed. However, this clamping device
It is provided separately from a guide bar that is necessary for guiding the transfer film when it is fed and for peeling off the transfer film from the molded product.
Since the clamp device and the guide bar must be placed above and below the molding section, there is a problem that a larger molding section cannot be secured within the mold having limited external dimensions. In addition, if the clamp device and guide bar come into contact with the pattern on the transfer film, the pattern will be damaged, so the gap between the pattern on the transfer film and the pattern is increased, and the clamp device and guide bar It is necessary to make contact with the gaps between the patterns.
For this reason, there is also the problem that the size between the patterns becomes large and there is a lot of wasted transfer film. The present invention solves the above-mentioned problems, allows larger molded products to be molded with the same mold size, and also enables efficient use of the transfer film by reducing the size between the patterns on the transfer film. The purpose is to obtain a mold for a transfer molding device that can be used.

(d) Means for Solving the Problems The present invention achieves the above object by providing the functions of a clamp device and a guide bar in one member. That is, one mold is provided with at least two guide clamp members that are longer than the width direction dimension of the transfer film and a guide clamp moving device that moves the guide clamp members, and the other mold is provided with both molds. An escape groove is provided to receive the guide clamp member when they are in close contact with each other, and there is a gap between the guide clamp member and the other mold and the position where the guide clamp member is in close contact with one of the molds and the transfer film is sandwiched and fixed. It is movable by a guide clamp moving device between a position where a transfer film is formed and a transfer film is allowed to pass therethrough. In addition,
The guide clamp moving device can be constituted by an ejector for ejecting the molded product.

(e) Effect With the above configuration, the transfer film is fixed by the guide clamp member from the time the transfer film is set to the device to the completion of molding.
Furthermore, the fixation of the transfer film can be released after the completion of molding until the transfer film is fed and positioned. Note that if you set the transfer film to be released after the transfer film is peeled off from the surface of the molded product after molding is completed, the design on the transfer film may be damaged or wrinkled. This is preferable because it eliminates the problem. If this guide clamp member is used, there is no need to separately provide a clamp device and a guide bar, so the size of the molding part can be increased, and the size between the patterns on the transfer film can be reduced. can.

(F) Embodiments Examples of the present invention will be described below with reference to FIGS. 1 to 5 of the accompanying drawings.

FIG. 1 shows a transfer molding device equipped with a mold according to the present invention. This transfer molding device has fixed plate 1
0, diver 12, movable plate 14, injection nozzle 16
A fixed die 18 is attached to the fixed platen 10, and a movable die 20 is attached to the movable platen 14. Note that the fixed mold 18 is composed of three separable molds. The movable platen 14 is provided with a horizontally movable frame 22, and roll devices 28 and 30 are provided on this frame 22 for feeding the transfer film 26 drawn out from the coil 24 and applying a predetermined tension. It is being The roll device 28 driven by a motor (not shown) also has a function as a longitudinal film positioning device that positions the transfer film 26 in the longitudinal direction. Note that the transfer film 26 is positioned in the width direction using the frame 22.
This is done by moving the film in the horizontal direction by a width direction film positioning device (not shown). The movable platen 14 is provided with a longitudinal direction sensor 32 for detecting the longitudinal direction mark 50 of the transfer film 26 shown in FIG. 5, and a width direction sensor 34 for detecting the width direction mark 52. The movable mold 20 is provided with four concave molding portions 36, and the fixed mold 18 is correspondingly provided with four convex molding portions 38. The movable mold 20 is provided with a pair of guide clamp members 40. As shown in FIG. 2, the guide clamp member 40 has a dimension longer than the widthwise dimension of the transfer film 26, so that the entire width of the transfer film 26 can be fixed. Guide clamp member 4
0 is connected to an ejector 44 for ejecting the molded product. This ejector 44 constitutes a guide clamp moving device. Guide clamp member 40
When the ejector 44 is protruded, the movable mold 20
A gap is formed between the movable mold 2 and the parting surface of the movable mold 2 when the ejector 44 is retracted.
It is designed to be in close contact with the parting surface of 0.
As shown in FIGS. 3 and 4, the edges of the guide clamp member 40 that come into contact with the transfer film 26 are chamfered to prevent the transfer film 26 from being damaged. The fixed type 18 has
An escape groove 46 is provided at a position corresponding to the guide clamp member 40 to prevent the guide clamp member 40 from interfering when the fixed mold 18 and the movable mold 20 are in close contact with each other.

Next, the operation of this embodiment will be explained. First, the ejector 44 is protruded with the mold open as shown in FIG. 1, and the film positioning device is activated with the guide clamp member 40 separated from the parting surface of the movable mold 20 as shown in FIG.
Marks 50 and 52 by sensors 32 and 34
Based on the detection signal, the transfer film 26 is precisely positioned in the longitudinal direction and the width direction. Next, the ejector 44 is retracted, and the transfer film 26 is fixed onto the parting surface of the movable mold 20 by the guide clamp member 40, as shown in FIG. Next, the mold is clamped. At this time, the guide clamp member 40 is inserted into the relief groove 46 of the fixed mold 18.
accepted within. Next, the molten resin is injected from the injection nozzle 16, and the pattern 48 on the transfer film 26 is transferred to the molded product at the same time as the molding. After cooling, the mold is opened while the transfer film 26 is fixed by the guide clamp member 40, and the transfer film 26 is peeled off from the surface of the molded product 39. Next, the ejector 44 is projected and the guide clamp member 40 is returned to the state shown in FIG.
Release the transfer film 26. On the other hand, fixed type 1
The molded product 38 remaining on the molded product 38 on the molded product 8 is released from the mold by an ejector on the fixed mold 18 side (not shown). The molding cycle continues in the same manner.
Since the transfer film 26 is securely fixed by the guide clamp member 40 before mold clamping,
The pattern 48 does not shift in position when the mold is clamped, and transfer molding can be performed with precise alignment. It is only necessary to secure a space for arranging the guide clamp member 40 in the movable mold 20,
More space can be allocated for the molding section 36 and larger molded parts can be molded. Moreover, the dimension a between the patterns shown in FIG. 5 of the transfer film 26 is the same as that of the guide clamp member 4
It is sufficient to ensure a dimension that does not touch 0, and more patterns 48 can be arranged within the same length range.

(G) Effects of the Invention As explained above, according to the present invention, there is provided a guide clamp moving device that moves at least two guide clamp members that are longer than the widthwise dimension of the transfer film and a guide clamp member to one mold. The other mold is provided with an escape groove that receives the guide clamp member when both molds are in close contact with each other, and the guide clamp member is in close contact with one of the molds and holds the transfer film between them. Since the guide clamp can be moved between the position where it is attached and fixed and the position where a gap is formed between the two molds and the transfer film is allowed to pass through, it is possible to move the transfer film using the guide clamp moving device. Since it is possible to secure a large amount of space and to arrange more designs on the transfer film, the transfer film can be used effectively. In addition, by connecting the guide clamp moving device to the ejector, the timing of protrusion and return of the guide clamp moving device can be freely set, and the clamping force for fixing the transfer film can be freely set. , it becomes possible to create an even better configuration.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a transfer molding device equipped with a mold according to the present invention, Fig. 2 is a view of Fig. 1 viewed in the direction of the arrow, and Fig. 3 is an enlarged view of the guide clamp member in a released state. FIG. 4 is an enlarged view of the guide clamp member in a fixed state, and FIG. 5 is a view showing the transfer film. 18... Fixed mold, 20... Movable mold, 26... Transfer film, 36, 38... Molding section, 40...
Guide clamp member, 44... Ejector (guide clamp moving device), 46... Escape.

Claims (1)

[Scope of Claims] 1. A transfer molding device that transports and positions a transfer film on which a design is printed to a predetermined position between molds for a predetermined length in each molding cycle, and transfers the design to the molded product at the same time as injection molding. In the mold, one mold is provided with at least two guide clamp members that are longer than the widthwise dimension of the transfer film and a guide clamp moving device that moves the guide clamp members, and the other mold is provided with both molds. An escape groove is provided to receive the guide clamp member when the two are in close contact with each other. A mold for a transfer molding device, characterized in that it is movable by a guide clamp moving device between a position where a gap is formed and a transfer film is allowed to pass through.