KR100443704B1 - In-mold coating apparatus and method - Google Patents

Abstract

The present invention relates to an in-mold coating apparatus and method, which is provided with a film roll support rod (3) for installing a film roll (2) on which a picture (28) is printed, and a film roll support rod installed at one end of the film roll support rod (3). (2) the speed control motor (4) rotates, and two rectangular column-shaped rods horizontally and horizontally across the film (1) between each other at a wider interval than the thickness of the film (1) Composed of a combined form, two small pneumatic cylinder (9a) is fixed to the center of one rectangular columnar rod fixed to the film clamp, and a rectangular film fixing frame for pressing the film (1) to the end surface of the mold (11) and a vacuum pump for evacuating the inside through the exhaust hole 20 formed by connecting the air inside the mold closed by the film 1 and the inner surface of the mold with the through-hole of the mold pin 18 of the mold ( 14) and the film fixing frame 11 molds the film 1 When pressed and fixed to the end surface, the heating wire 15 is installed above the film fixing frame 11 so that the film 1 can be cut, and the pneumatic cylinder 9d is installed on the opposite side of the mold of the film fixing frame 11. In the in-mold coating device is provided with a heating plate 16 for heating up and down the film (1) by vertical movement is possible by the vertical, fixed to both ends of the film clamp (7) is vertically installed sub-motor ( A time belt configured to allow vertical movement by two corresponding pulleys 13 formed on the rotation shaft of the sub-parameter 8, a sub motor 8 whose rotation angle is adjusted according to the number of pulse signals, and a sub motor 8 Two pulleys 13 formed on the rotation axis of the motor, the speed control motor 4, the sub-motor 8, the pneumatic cylinders 9a, 9b, 9c, 9d, and the vacuum pump 14 PLC controller that controls the heating wire 15 and the heating plate 16 in accordance with the programmed sequence ( 6) Consist of coating the film (1) printed with painting (28) at the same time as injection and coating the film with painting at the same time with injection to improve the completeness of the injection molding, and to automatically paint the painting easily on the curved surface As much as possible, reduce the effort, time, and expense of painting after finishing.

Description

In-mold coating apparatus and method

In the method of printing a picture drawn with a pattern, pattern, decoration, etc. on the synthetic resin injection molding,

Conventionally, the post-processing method is applied to the extruded product by a technique such as screen printing, but there is a limit in printing a picture on a curved surface.

In order to solve the above problems, after vacuum-adsorbing the synthetic resin film printed on the inner surface of the mold, the injection solution is filled into the inner surface of the mold, and the film coated with the printed film is directly coated on the injection molding at the same time. Automate the process and easily print pictures on curved surfaces.

1 is a side view of an embodiment of the present invention

2 is a partial detailed view of FIG.

Figure 3 is a front view of the embodiment of the present invention

4 is a partial detailed perspective view of FIG.

5 is a side view of the '-' shaped member pressed and fixed to the end face of the mold 1 after the film clap moves downward;

Figure 6 is a side view of the 'c'-shaped member is fixed to the cross section of the mold 1 film

7 is a side view of the heating plate moving downward to heat the film and vacuum absorbing the film to the inner surface of the mold 1;

Figure 8 is a side view of the mold 2 and the mold 1 is joined with the film fixing frame between the heating plate after the upward movement

<Explanation of symbols for main parts of drawing>

1 film 2 film roll

3: film roll support rod 4: speed control motor

5: Air Piping 6: PLC Controller

7: film clamp 8: sub-motor

9a, 9b, 9c, 9d: Pneumatic cylinder 10: Time belt

11: film fixing frame 12: mold 1

13: pulley 14: vacuum pump

15: heating wire 16: heating plate

17: Mold 2 18: Milpin

19: plate 20: exhaust hole

21: air solenoid valve integrated part 22: adhesive roller

23: air pump 24: '-' shaped member

25: 'c' shaped member 26: sensor

27: Point Marking 28: Picture

29: power clutch

The present invention relates to an apparatus and method for coating a film (1) on which a picture (28) is printed simultaneously with the injection of a synthetic resin,

The film roll 2 wound in the form of a roll is printed on the synthetic resin film 1 by repeatedly printing the desired drawing 28 and the point marking 27 which can be detected by the sensor 26 by screen printing. It is attached to the film roll support rod (3).

The film roll supporting rod (3) is configured to be capable of rotating movement by the speed control motor (4) installed on one end of the rod so that the film (1) can be wound or unrolled as necessary, and the spring is circumferentially on the end of the rod. By installing the power clutch 29 using the elastic force of the tension to a certain reference to the film 1 is pulled by the film clamp.

The film 1 is unrolled from the film roll 2 to the desired position by using the film clamp 7 capable of vertical movement by the sub-motor 8.

The film clamp (7) is composed of two rectangular columnar rods horizontally parallel to each other with the film (1) interposed therebetween at both ends at a wider interval than the thickness of the film (1), Two small pneumatic cylinders 9a are fixedly installed at the center of one rectangular columnar bar at proper intervals, and the cylinder rod is moved back and forth by pneumatic pressure to compress and fix the film 1 to the end surface of the other rod. The film 1 is installed to be picked up, and a sensor 26 capable of detecting the point marking 27 printed on the film 1 passing between the two bars is installed at one end corresponding to the point marking 27. do.

The time belt 10 is fixedly installed at both ends of the film clamp 7 to allow vertical movement by two corresponding pulleys 13 formed on the rotation shaft of the sub-motor 8.

When the film clamp 7 picks up the film 1 and moves downward to the proper position of the mold (detailed above the '-' shaped member 24), the film fixing frame 11 moves the film 1 to the mold 1. The vacuum pump 14 is compressed through the end surface of the mold 12 and the air inside the mold sealed by the film 1 and the inner surface of the mold through the exhaust hole 20 which is connected to the through hole of the mold pin 18 of the mold. Exhaust to

The film fixing frame 11 is a rectangular picture frame in the form of a through-hole, such as the shape of the mold in the center of the '-' shaped member 24 and the '' 'shaped member 25 in the upper pair It is possible to exercise independently.

The p-shaped member 24 and the 'c'-shaped member 25 of the film fixing frame 11 are provided with a plurality of pneumatic cylinders 9b and 9c to be in close contact with or spaced apart from the mold 1 12 as necessary. Configure it to be.

When the film clamp 7 pulls the film 1 so that the lower end of the film 1 lies between the '-' shaped member 24 and the end face of the mold, the '-' shaped member 24 is pneumatic cylinder 9b. After pressing the lower end of the film (1) to the end face of the mold 1 (12) by the operation of the pneumatic cylinder (9a) of the film clamp (7) is activated to release the action of holding the film (1) to move upwards' At the top of the 'c'-shaped member 25, the film 1 is picked up again so that a moderate tension is applied to the film 1, and the' c'-shaped member 25 is compressed to a mold by a pneumatic cylinder 9c. The film 1 is crimped | bonded to the cross section of the metal mold | die 1 (12) by the method of fixing (1).

At this time, the film clamp 7 picks up the film 1 while leaving the lower part of the film 1 so as not to interfere with each other's movement in the operation of the film clamp 7 and the film fixing frame 11. The film 1 is stopped between the 'shaped member 24 and the film 1 is placed between the'-'shaped member 24 and the mold 1 12 by the weight of the film 1, and the' c 'shaped member ( 25 is configured to be spaced apart from the mold 1 (12) so as not to interfere with the movement of the film clamp (7).

When the film fixing frame 11 fixes the film 1, the heating wire 15 provided above the film fixing frame 11 acts to cut the film 1. The heating wire 15 is composed of a thin heating wire that is heated by electricity and the temperature is quickly lowered when the power is cut off.

When the film 1 is cut, the film clamp 7 moves up to a position where the film 26 is placed and the sensor 26 installed on the film clamp 7 detects the point marking 27 displayed on the film 1. It is in the ready position again.

A heating plate 16 acting by electricity is installed on the opposite side of the mold of the film fixing frame 11 to heat the film 1, and the pneumatic cylinder 9d is configured to be able to be moved as needed.

The mold is composed of a mold 2 (17) forming a mold and the mold 1 (12) in which the film 1 is vacuum-absorbed on the inner surface. The mold 1 (12) is composed of a plurality of pins (18) for easily separating the injection from the mold, and the pins (18) are fixed to the mill plate 19 to reciprocate through the mold, the mill pin ( 18) When the exhaust hole 20 is formed in the through hole and evacuated by the vacuum pump 14, the film 1 is pressed into the film 1 and the inner surface of the mold 1 12 by the film fixing frame 11. As the pressure inside the mold 1 12 is lowered, the film 1 heated by the heating plate 16 is stretched and sucked into the mold 1 12 and finally adsorbed to the inner surface of the mold 1 12. do.

When the film 1 is adsorbed on the inner surface of the mold 1 (12), the heating plate 16 is moved upward and the mold 2 (17) is moved in the direction in close contact with the film fixing frame 11 to complete the entire mold, When the injection process proceeds, the film 1 inside the mold is combined with the injection molding to simultaneously coat the film 1 on which the figure 28 is printed.

As a control unit that controls the whole control, the work is performed according to the order of the pre-programmed process using the PLC controller 6, and the sensor 26 which detects the point marking 27 printed on the film 1 ) Can be used as a photosensor.

The heating plate 16 can be controlled to maintain a constant temperature by installing an electric temperature sensor, the sub-motor (8) according to the detection of the sensor 26 installed in the film clamp (7) of the forward and reverse rotation and stop The control signal is received by the PLC controller 6 and controlled, and the pneumatic cylinders 9a, 9b, 9c, and 9d used in the present invention are operated by an air solenoid valve to control the electrical control signal of the PLC controller 6. According to the controllable configuration, the air solenoid valve integration unit 21 may be configured for convenience.

According to the position of the sensor 28 detecting the point marking 27, the preparation position of the film clamp 7 may be changed as necessary according to the position of the figure 28 and the point marking 27 repeatedly printed on the film 1. The controller which moves upwards or downwards by a suitable distance is comprised by the PLC controller 6 possible.

Since the overall flow proceeds consistently, the controller is composed of a PLC controller 6 which is generally used for sequence control, but other methods are possible.

The preparation position of the film clamp 7 refers to a position where the clamp picks up the film 1 and pulls it to the position of the film fixing frame 11 below, whereby the film 1 is placed at an appropriate position of the mold 1 12 to allow vacuum adsorption. In addition, the picture 28 printed on the film 1 and the point marking 27 are repeatedly printed at regular intervals, thereby becoming the same position in the repetitive process.

The side of the film 1 on which the figure 28 has been printed should be configured to abut the surface of the extrudate.

If you describe each process step by step,

The sub-motor 8 rotates the pulley 13 on the rotating shaft by an appropriate rotation angle according to a program previously input to the PLC controller so that the time belt 10 interlocked with the pulley 13 moves downward. A first step in which the film clamp 7 fixed to 10) moves downward from the preparation position together with the film 1 to the proper position of the mold 1 12;

The pneumatic cylinder 9b of the '-' shaped member of the film fixing frame 11 operates the film 1 transferred in the first step, and the film 1 is moved to the cross section of the mold 1 12 by the '-' shaped member. Pressing and fixing the second step,

A third step in which the pneumatic cylinder (9a) rod of the film clamp (7) is reversed and the action of picking up the film (1) is released;

A fourth step in which the film clamp 7 moves upward of the film fixing frame 11;

A fifth step of picking up the film 1 by advancing the rod of the pneumatic cylinder 9a of the film clamp 7,

The pneumatic cylinder 9c of the 'c'-shaped member 25 of the film fixing frame 11 acts to press and fix the film 1 to the end face of the mold 1 12;

A seventh step of cutting the film 1 by heating the heating wire 15 fixed on the upper portion of the 'c-shaped member,

The sub-motor 8 drives to move the film clamp 7 upward. When the sensor 26 mounted on the film clamp 7 detects the point marking 27, the motor stops and the PLC controller 6 again. ), The film clamp 7 is moved to the ready position by forward or reverse rotation according to a program previously inputted in (), and the pneumatic cylinder (9a) rod of the film clamp (7) moves forward to pick up the film (1). The eighth step,

A ninth step of heating the film 1 fixed to the end surface of the film fixing frame 11 and the mold 1 12 by moving the heating plate 16 downwardly behind the film fixing frame 11;

The vacuum pump 14 operates to evacuate the internal air of the mold 1 12 and the mold 1 12 surrounded by the film 1 through the exhaust hole 20 of the mold 1 12 to evacuate the film 1. A tenth step of vacuum suction on the inner surface of the mold 1 (12),

An eleventh step of moving the heating plate 16 upward;

A 12th step in which the mold 2 (17) forms a mold with the mold 1 (12) and the film fixing frame 11 interposed therebetween,

Injecting the injection solution into the mold and the film 13 is coated in the injection molding and the injection molding at the same time in the mold, and

The 14th step of separating the injection molding from the mold.

In the first step, the fourth step, and the eighth step, the sub-motor 8 whose rotation angle is adjusted in accordance with the number of pulse signals input by the method of adjusting the rotation angle of the sub-motor 8 is used. It is possible to program and adjust the controller 6.

The first step is configured sequentially in the flow of time previously programmed in the PLC controller, but only the eighth step is intercepted according to the electrical signal detected by the sensor 26 to program the next step.

By way of example,

When the nylon film 1 is used, the temperature of the heating plate 16 is about 200 ° C, and the temperature of the heated nylon film 1 is about 150 ° C.

The adhesive roller 22 is formed on the upper side to remove impurities such as dust which may be deposited on the printing surface of the film 1.

As the printing ink, a urethane ink resistant to heat can be used.

At the same time as the injection coating, the film is printed to increase the completeness of the injection molding, and it is possible to easily apply the painting to the curved curved part automatically, thus reducing the effort, time and expense of post-processing.

Claims (6)

A film roll support rod (3) for installing the film roll (2) on which the picture (28) is printed, and a speed control motor (4) installed at one end of the film roll support rod (3) to rotate the film roll support rod (3). ), And two rectangular columnar rods horizontally and parallel to each other with the film 1 interposed therebetween, having a wider distance than the thickness of the film 1, and having only two ends joined to each other. (9a) is a film clamp fixed to the center of one rectangular columnar bar at fixed intervals, a rectangular film fixing frame (11) for pressing the film (1) to the end surface of the mold, and the film (1) and the mold The vacuum pump 14 for evacuating the inside of the mold sealed by the inner surface through the exhaust hole 20 is formed in connection with the through-hole of the mold pin 18 of the mold, and the film fixing frame 11 is a film When (1) is pressed and fixed to the end surface of the mold, the film (1) can be cut. The heating wire 15 installed above the lock film fixing frame 11 and the opposite side of the mold of the film fixing frame 11 is installed up and down by the pneumatic cylinder 9d, and is operated by electricity to form a film ( In the in-mold coating apparatus provided with a heating plate 16 for heating 1), A time belt vertically fixed at both ends of the film clamp 7 and configured to vertically move by two corresponding pulleys 13 formed on a rotation shaft of the sub-motor 8; A sub-motor 8 whose rotation angle is adjusted according to the number of pulse signals, Two pulleys 13 formed on the rotation shaft of the sub-motor 8, The speed control motor 4, the sub-motor 8, the pneumatic cylinders 9a, 9b, 9c, 9d, the vacuum pump 14, the heating wire 15 and the heating plate 16 in the order of the programmed process In-mold coating device comprising a PLC controller (6) to control according to the coating and coating the film (1) is printed 28 at the same time as the injection. The power clutch 29 according to claim 1, wherein a tension of a predetermined standard is generated in the film 1 pulled by the film clamp by using the spring force of the spring on the other end of the film roll support rod. In-mold coating apparatus characterized in that the installation. The sensor 26 according to claim 1, wherein a sensor 26 capable of detecting the point marking 27 printed on the film 1 passing between the two rectangular pillars is installed at one end corresponding to the point marking 27. In-mold coating apparatus, characterized in that. The method of claim 1, wherein the film fixing frame is composed of a '-' shaped member 24 at the bottom and a 'c' shaped member at the top, and the pneumatic cylinders 9b and 9c press the film 1 to the ends of the mold. In-mold coating device, characterized in that the through-hole is formed in the center like a mold. A first step in which the film clamp 7 fixed to the time belt 10 moves downward from the preparation position to the proper position of the mold 1 12 with the film 1 at the ready position; , The pneumatic cylinder 9b of the '-' mold member of the film fixing frame 11 is operated on the film 1 transferred in the first step so that the film 1 is cut into the '-' mold member by the cross section of the mold 1 (12). A second step of pressing and fixing the A third step in which the pneumatic cylinder (9a) rod of the film clamp (7) is reversed and the action of picking up the film (1) is released; A fourth step in which the film clamp 7 moves upward of the film fixing frame 11; A fifth step of picking up the film 1 by advancing the rod of the pneumatic cylinder 9a of the film clamp 7, The pneumatic cylinder 9c of the 'c'-shaped member 25 of the film fixing frame 11 acts to press and fix the film 1 to the end face of the mold 1 12; A seventh step of cutting the film 1 by heating the heating wire 15 fixed on the upper portion of the 'c-shaped member, An eighth step in which the sub-motor 8 drives to move the film clamp 7 to the ready position, and the pneumatic cylinder 9a rod of the film clamp 7 moves forward to pick up the film 1; A ninth step of heating the film 1 fixed to the end surface of the film fixing frame 11 and the mold 1 12 by moving the heating plate 16 downwardly behind the film fixing frame 11; A tenth step of operating the vacuum pump 14 to vacuum suck the film 1 to the inner surface of the mold 1 12; An eleventh step of moving the heating plate 16 upward; A 12th step in which the mold 2 (17) forms a mold with the mold 1 (12) and the film fixing frame 11 interposed therebetween, A thirteenth step of injecting the injection solution into the mold and coating the film 1 with the injection at the same time as the injection in the mold; Characterized coding method comprising the step 14 of separating the injection molding from the mold The method of claim 5, wherein the sub-motor (8) is driven to move the film clamp (7) to the ready position, and the pneumatic cylinder (9a) rod of the film clamp (7) is advanced to pick up the film (1), The sub-motor 8 is driven to move the film clamp 7 upward, but when the sensor 26 installed in the film clamp 7 detects the point marking 27, the motor stops, and again the PLC controller ( 6) In-mold coating method comprising the step of moving the film clamp (7) to the ready position by forward or reverse rotation according to the program input in advance.