JPS60131213A - Transfer molding device - Google Patents

Abstract

PURPOSE:To extract an injection molded part simply without damaging it by molding the molded prt on a continuously flowing transfer film provided with a pattern and using a specific guide roll separating both the transfer film and the molded part. CONSTITUTION:A transfer film 71 with a pattern is fed continuously between a fixed mold 36 and a movable mold 40, and injection-molded between a recessed section 40' in the movable mold 40 and an injection nozzle 99, thus molding a molded part 86. The transfer film 71 is carried onto a guide roll 74 while the molded part 86 is attached again. When the transfer film passes through the guide roll 74, the molded part 86 is separated from the transfer film 71, and the molded part 86 with the pattern is dropped efficiently onto a conveyor belt 88 for discharge without being damaged by doctor rolls 80. The used transfer film is discharged from a pull roll 16.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a transfer molding device, and particularly to a device for peeling and taking out a molded product from a transfer film.

(b) Conventional technology The transfer molding apparatus is a device that inserts a transfer film between molds and transfers the design on the transfer film to the molded product at the same time as injection molding. After transfer molding, it is necessary to release the shaped product from the mold and peel off the transfer film. Japanese Unexamined Patent Publication No. 48-4376'0 ``Method for Manufacturing Cosmetic Resin Molding'' (published on June 23, 1971) discloses one method of transfer molding, but transfer film and molded body □ There is no specific information on how to deal with the goods.
Therefore, it is unclear what method will be used to industrially mass-produce transfer molded products. Also, Tokukai Showa 5s
-T6T542 Publication ``Method for Manufacturing Painted Molded Products'' (published on November 24, 1981) also discloses a transfer molding method, but does not provide a specific explanation of the method for peeling off the transfer film. Not talked about. In addition, a method for peeling off the transfer film during the mass production process was proposed in a patent application filed in 1983.
-117079. That is, after the transfer film is sandwiched between molds and molded, when the mold is opened, the molded product is held in a fixed mold by undercuts, etc., and the transfer film is moved back together with the movable mold to open the mold. This method involves peeling off the molded product at the same time as operation. The transfer film is peeled off and the molded product is ejected from the fixed mold by an ejector pin, falls downward, and is carried out by a chute, conveyor, etc. In addition, when an industrial robot is used to take out the molded product, the industrial robot grips the molded product on the fixed mold and operates an ejector pin, and the industrial robot takes it out. However, the above method has the following problems. In other words, with the method of ejecting the molded product with an ejector pin and dropping it, the surface of the molded product is likely to be damaged by falling from a high place, increasing the defective rate, and the orientation of the molded product being carried out is irregular, making it difficult to carry out the product. The subsequent handling is also troublesome. Furthermore, when an industrial robot is used, an expensive industrial robot is required simply to take out the molded product, which increases equipment costs.

(c) Purpose of the Invention The present invention enables efficient removal of the transfer film in transfer molding and removal of the molded product in the mass production process, and moreover, without damaging the molded product.
The objective is to obtain a transfer molding device with low equipment cost.

(d) Structure of the Invention The transfer molding apparatus according to the present invention includes a film feeding/positioning means for sequentially feeding and positioning a long transfer film between molds, and a film feeding/positioning means for feeding and positioning a long transfer film between molds, and a molten resin to a molding part between the molds. A transfer molding means that transfers at the same time as injection molding, a mold release means that releases the molded product and transfer film from the mold while keeping them attached to each other, and a transfer film that is sent out from the mold with the molded product still attached. Wrap the film on the back side of the side to which the molded product is attached.
- It has a guide means for hanging and guiding, and a peeling means disposed close to the guide means for peeling off the molded article from the transfer film that is attached to the transfer film and tries to pass through the guide means.

(e) Examples Examples of the present invention will be described below with reference to FIGS. 1 to 5 of the operation drawings.

(First Embodiment) A first embodiment of the present invention is shown in FIGS. 1 to 3. frame 31
Tie bar 3 attached to fixed plate 32 fixed above
A movable platen 34 is guided by 3. The movable platen 34 is movably supported on the frame 31 by rollers 35. A fixed mold 36 is attached to the fixed platen 32, and the fixed mold 36 is composed of a fixed mold 36a, a fixed mold 36b, and a fixed mold 36C. The fixed mold 36c is fixed to the fixed platen 32, but the fixed mold 36a and the fixed mold 36
b is guided by a support pin 37 fixed to a fixed mold 36c and is movable in the axial direction of the support pin 37. However, the fixed mold 36a and the fixed mold 38b are connected by a chain 38 so that the distance between them does not exceed a predetermined distance. Also, fixed type 36
The distance between b and the fixed mold 36c is also prevented from exceeding a predetermined distance by a mechanism not shown. Fixed type 36a
has a convex portion 36a' on its parting surface side.

Furthermore, the fixed mold 36 is activated during the mold opening operation, and the molded product 86 is
It has a protruding pin 20 that protrudes. This fixed type 3
6, molten resin can be injected from an injection nozzle 99.

A movable mold 40 is attached to the movable platen 34. The movable mold 40 has a concave portion 4 corresponding to the convex portion 36a' of the fixed mold 36a.
0'. The convex portion 36a' and the four portions 40' constitute a molding section of the mold. The movable mold 40 and the fixed mold 36a are connected by a link 98, and when the mold opening operation is performed, the fixed mold 36a is connected to the movable mold 40 by this link 98.
a is pulled, and the fixed molds 36a, 36b, and 36c are pulled apart from each other. Movable type 4
0 has an ejection pin 22 that is activated during the mold opening operation to eject the molded product 86 and the transfer film 71. This projecting pin 22 and the above-mentioned projecting pin 20 constitute a mold release means. An upper frame 60 and a lower frame 61 are attached to the movable platen 34 so as to be movable in the horizontal direction. The frames 6O and 61 can be moved in the horizontal direction by a motor and a pole screw mechanism (not shown). The frame 60 has a drive roll 7 for feeding the transfer film 71 unwound from the coil 97.
3 and a push roll 72 are provided. push roll 7
2 is pressed against the drive roll 73 by a spring. A guide roll 75 for guiding the transfer film 71 is also provided at the top of the frame 60. The drive roll 73 is driven by a motor (not shown). Also,
The frame 61 includes a guide roll 74 and a tension roll 76.
and a push roll 78 are provided. tension roll 76
is connected to the motor via a hysteresis craft (not shown). The hysteresis clutch is an electric slip clutch that always transmits a constant rotational force (note that a torque motor, powder clutch, etc. can also be used in place of the hysteresis clutch). Push roll 78 is pressed against tension roll 76 by a spring. The drive roll 73, tension roll 76, frames 60 and 61, these drive mechanisms, a film position detection sensor (not shown), a controller, etc. constitute a film feed φ positioning means.

As shown in FIG. 3, the guide roll 74 has collars 74a that guide both sides of the transfer film 71.
It is rotatably supported by a bearing 79 with respect to a shaft 77 . Four rotatable doctor rolls 80 are arranged diagonally downward in series near the guide roll 74.

The outer periphery of the doctor roll 80 is covered with rubber 80a. A chute 82 is formed along the doctor roll 8O. Another chute 84 is provided below the chute 82.

The chute 84 has a twisted inner diameter passageway that allows the molded article 86 passing therethrough to be turned through 90 degrees. A conveyor 88 is provided below the chute 84. Further, a chute 94 is provided below the fixed die 36 to receive the sprue 90 discharged from between the die 36 a and the die 36 b and convey it onto the conveyor 92 .

Next, the operation of this embodiment will be explained. Drive roll 7
3, the transfer film 71 is sent downward in FIG. 1, and the pattern on the transfer film 71 is positioned at a predetermined position between the fixed mold 36 and the movable mold 40. The width direction position of the transfer film 71 is also determined by moving the frames 60 and 61 in the horizontal direction. Next, the movable platen 34 advances to the right in FIG. 1 to close the mold, and the transfer film 71 is transferred to the fixed mold 3.
6 and the movable mold 40.

Next, the molten resin is injected from the injection nozzle 99 into the molding part, and the molded product 86 is molded, and at the same time the transfer film 7
1 The above design is transferred onto the molded product 86 0 Next, the movable platen 34 retreats to the left in FIG.
The ejecting pin 22 is operated to release the molded product 86 and the transfer film 71 from the fixed mold 36 and the movable mold 40 while remaining attached to each other. Next, the transfer film 71 is fed by a predetermined amount for the next molding. Transfer film 71
The part where the molded product 86 is attached is the guide roll 7.
4, the transfer film 71 comes into contact with the guide roll 74 on the side opposite to the side to which the molded product 86 is attached, and the transfer film 71 bends along the curvature of the guide roll 74, so that the rigidity increases. The molded product 86 with a large value is subjected to a force that tends to separate it from the transfer film 7'1.

Furthermore, in addition to this, since a doctor roll 80 is provided close to the guide roll 74, even if the adhesive force between the molded product 86 and the transfer film 71 is strong, the molded product 86
6 is forcibly separated from the transfer film 71 by a doctor roll 80 as shown in FIG. Since the doctor roll 80 is covered with rubber 80a, it will not damage the molded product 86.The molded product 86 separated from the transfer film 71 is then moved along the chute 82 with the transfer surface facing upward. It is then turned into a predetermined direction by a chute 84 and gently falls onto a conveyor 88. Therefore, the transfer surface of the molded product 86 does not come into contact with the chutes 82 and 84 or the conveyor 88, and the possibility that the transfer surface will be damaged is extremely small. The molded article 86 is then transferred to the outside of the molding apparatus by a conveyor 88. Note that the guide roll 74 is connected to the transfer film 7.
In the state in which positioning 1 has been performed, the molded product 86 is arranged so as not to come into contact with it. This is to ensure that a constant tension is applied to the transfer film 71 and to prevent the positioning accuracy from decreasing. It is preferable that the position of the guide roll 74 is adjustable so that it can accommodate various molded products. As described above, the molded product 86 is transferred to a position close to the chute 82 while being attached to the transfer film 71, and is separated by the guide roll 74, and the separated molded product 86 is immediately transferred to the chute 82 and the chute 82.
The molded product 8 is transferred to the conveyor 881: by
6 is not damaged, and the posture and direction of the molded product 86 can be kept constant, making it possible to mass-produce transfer molded products very efficiently. Moreover, an expensive industrial robot or the like is not required, and the molded product 86 is reliably separated by the guide roll 74 and doctor roll 80.

(Second Embodiment) FIG. 4 shows a second embodiment of the present invention. In this second embodiment, the guide roll 74' is installed below so as to be close to the conveyor 88, and the doctor roll 88 of the first embodiment is
0 is replaced with a plate-shaped rubber doctor 80'. Also in this second embodiment, when the transfer film 71 with the molded product 86 attached passes through the guide roll 74', the molded product 86 is removed from the transfer film 71 by the joint action of the guide roll 74' and the doctor 80'. It is torn off and falls onto the conveyor 88. In this case, since the guide roll 74' is close to the conveyor 88, no chute is necessary. Note that in this second embodiment, the tension roll 7
A winding device 95 for winding up the used transfer film 71 is provided downstream of the transfer film 6 to simplify the processing of the used transfer film.

(Third Embodiment) FIGS. 5 and 6 show a third embodiment of the present invention. In this third embodiment, a film feeding/positioning means is provided on the fixed platen 32 side, and separation of the molded product 86 from the transfer film 71 is performed outside the molding apparatus. The molded product 86 formed between the fixed mold 36 and the movable mold 40 is sent downward while being attached to the transfer film 71, and its direction is changed horizontally by the rotating guide roll device 100. The rotating guide roll device 100 includes four wooden arms 104 attached to a rotating shaft 102. and arm 104
The rotating shaft 102 is rotated in synchronization with the feeding speed of the transfer film 71 by a motor (not shown). The dimensions between the rolls 106 are such that the molded product 86 attached to the transfer film 71 does not come into contact with the rolls 106. The transfer film 71, whose direction has been changed horizontally by the rotating guide roll device 100, is supported by a plurality of guide rolls 108, passes through the lower part of the forming device, and is sent to the guide roll 74'. Note that the molding device is provided with a window 28 through which the transfer film 71 is passed through first (this window 28 is also used for inspection).
. A doctor blade 80' similar to that of the second embodiment described above is arranged adjacent to the guide roll 74'. Guide roll 7
The molded product 86 separated from the transfer film 71 by the roller 4' and the doctor 80' is transferred by a conveyor 88. Further, the used transfer film 71 is wound up by a winding device 95. It is clear that the third embodiment also provides the same functions and effects as those of the first embodiment. In addition, in this embodiment, the molded products 86 are separated outside the molding device, so the conveyor can be shortened, and a large winding device 95 can be used, so long-term continuous operation is possible. It is possible.

In the first to third embodiments described above, the apparatus is configured to separate the molded product adhering to the transfer film within a relatively short period of time after molding. The apparatus may be configured so that the transfer film is temporarily wound onto a reel, and the wound film is rewound at different times and locations, and the molded products are separated.

(f) As described in detail, according to the present invention, in a transfer molding device that inserts a transfer film between molds and transfers a design on the transfer film to a molded product at the same time as injection molding,
Film feeding/positioning means for sequentially feeding and positioning a long transfer film between molds (in the described embodiment, a drive roll 73, a tension roll 76, horizontally movable frames 60 and 61, etc.) ), and a transfer molding means (molds 36, 40, injection nozzle 9
9), and a mold release means for releasing the molded product and the transfer film from the mold while keeping them attached to each other (protrusion bottles 20 and 2
2) and a guide means (in the described embodiment, a guide roll 74°) that wraps and guides the transfer film sent out from the mold with the molded product attached on the back side of the surface to which the molded product is attached. A guide bar may also be used), and a peeling means (a doctor roll 80 or Since it has a doctor 80'), it is possible to damage the transfer molded product without using an expensive industrial robot; and it is possible to perform transfer molding efficiently and continuously. In addition, as in the first embodiment shown in Figures 1 to 3, when a chute is used, the posture and orientation of the molded product can be kept constant, which simplifies the post-processing of the molded product. . In addition, as in the third embodiment shown in Figures 5 and 6, the transfer film and the molded product can be taken out and peeled off together to the desired location, so the molded product can be processed and the used transfer film can be removed. Processing becomes easier. Further, since it is not necessary to peel off the transfer film from the molded product between the molds, the film feeding/positioning means can be provided on the fixed plate side. Further, since the present invention separates the molded product from the transfer film at a location other than the molding section, it can also be applied to a vertical injection machine.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a transfer molding device according to the present invention, FIG. 2 is a diagram showing a guide roll and a doctor roll of the transfer molding device shown in FIG. 1, and FIG. 3 is a diagram showing a line III-III in FIG. A sectional view along the line, FIG. 4 is a diagram showing a second embodiment of the present invention,
FIG. 5 is a diagram showing a third embodiment of the present invention, and FIG. 6 is a diagram showing a rotating roll device of the transfer molding apparatus shown in FIG. 20... Protruding bottle, 22... Protruding bottle, 31-
...Frame, 32...Fixed m, 33...To pot tie -134...Movable plate, 35Φ...Roller, 36.36
a, 36b, 36c* **Fixed type, 36a'...Protrusion, 37...Support bin, 38...Chain, 4
O...Movable type, 40'...Concave portion, 60...Frame, 71...Transfer film, 72...-Press roll, 73...Drive roll, 74...Working guide roll,
75...Guide roll, 76, Tension/Tension low; L,"
, , : 77・cloud・shaft, 78...push roll, 79
... φ bearing, 80... Doctor roll, 82.
... Chute, 84 ... Chute, 86 - Molded product, 88 ... Conveyor, 90 ... Sprue, 92-Φ
φ conveyor, 94... - chute, 95... winding device, 97... coil, 98... link, 99... injection nozzle. Patent applicant Nikki Steel Co., Ltd. Nissha Printing Co., Ltd. Agent Patent attorney Toshiyuki Miyauchi Figure 2■---J Figure 3

Claims (1)

[Claims] In a transfer molding device that inserts a transfer film between molds and transfers the design on the transfer film to a molded product at the same time as injection molding, a long transfer film is sequentially sent between the molds. A film feeding/positioning means for supplying and positioning the film; a transfer molding means for injecting and transferring the molten resin to the molding part between the molds at the same time as the molding; A mold release means for releasing the mold, a guide means for wrapping and guiding the transfer film sent out from the mold with the molded product attached on the back side of the surface to which the molded product is attached, and disposed close to the guide means. 1. A transfer molding apparatus comprising: means for peeling off a molded article from the transfer film that attempts to pass through the guide means while adhering to the transfer film.