JPH06312435A - Apparatus and method for molding laminated molded form - Google Patents

Abstract

PURPOSE:To laminate even complicated molded forms without fracture, etc., and to improve its external appearance quality by continuously or intermittently controlling to alter a tension of a skin material in response to an inserting amount of the skin material to molds when the skin material and a core resin are laminated. CONSTITUTION:A molding machine main body 1 consists of an injecting unit 2 and a mold clamping unit 3. A skin material and a core resin are laminated by a stationary mold 11 and a movable mold 21 of the unit 3. In this case, the unit 3, etc., is added with a skin material gripping unit 40 for applying tension to the skin material. On the other hand, a stroke or a time at the time of clamping a movable die plate 22 or a movable mold 21 of the unit 3 is detected. The tension of the skin material is controlled to be altered by the unit 40 based on a detection signal. That is, the tension of the skin material is continuously or intermittently controlled to be altered in response to an insertion amount of the skin material. Thus, even with a complicated molded form, it can be laminated without partial fracture or wrinkle to improve its external appearance quality.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus and a molding method for a bonded molded article, and more particularly to a molding apparatus and a molding method for a bonded molded article for manufacturing molded articles such as automobile interior parts. It is about.

[0002]

2. Description of the Related Art Conventionally, as a method for producing a bonded molded article, for example, there is a method disclosed in Japanese Patent Publication No. 63-66651. In this method, a fixed frame is provided on the mold side, the peripheral edge of the skin material is clamped between the fixed frame and the fixed mold (female mold) with a constant clamping force, and then the fixed mold and the movable mold ( The male material) is approached to slip the peripheral edge of the skin material between the fixed frame and the fixed mold, and the skin material is squeezed into the concave portion of the fixed mold.

[0003]

However, in the conventional method of Japanese Patent Publication No. 63-66651, when the peripheral edge of the skin material is clamped by a constant clamping force, the mold is clamped and the skin material is narrowed down in the mold. In addition, because it is performed while slipping between the skin material and the fixed frame, and between the skin material and the female mold, if the clamping force is too large, the skin material will break, and if it is too small, wrinkles will occur in the skin material. There's a problem. Also,
Even if the clamping force is within the appropriate range, the tension applied to the skin material and the amount of deformation due to this will become uneven in molded products such as deep-drawn products and products with complex shapes. If it is kept constant, there is a problem that partial tearing, damage, wrinkles occur, and the appearance quality deteriorates.

The present invention focuses on the above-mentioned problems, and relates to a molding apparatus and a molding method for a bonded molded product, and in particular, a bonded product for manufacturing molded products including interior parts such as automobiles having excellent appearance quality. The object is to improve a molding apparatus and a molding method for molded articles.

[0005]

According to the first aspect of the present invention, in the first aspect of the present invention, a woven fabric, a non-woven fabric, a thermoplastic resin or thermoplastic elastomer sheet, and a film made of a skin material and a core resin are used. In the molding method of the laminated molded product, the core material resin injected into the cavity between the fixed mold and the movable mold is inserted into the fixed mold by the movable mold and is bonded according to the insertion amount of the skin material. To change the tension of the skin material continuously or stepwise.

In the second invention, which is mainly based on the first invention,
The movable die slides the skin material in the direction of the fixed die at a predetermined speed according to the speed at which the skin material is inserted into the fixed die.

In the second invention or the third invention, which is mainly based on the first invention, the skin material is held at least at two or more locations outside the location where it is inserted into the fixed die by the movable die,
The tension of the skin material at each location is made to be equal or not equal.

In the fourth invention, a sheet of woven fabric, non-woven fabric, thermoplastic resin or thermoplastic elastomer is formed by using an injection device, a mold clamping device, and a fixed mold and a movable mold attached to the mold clamping device. , A film and the like, for laminating a skin material and a core resin, a mold clamping device, or a skin material gripping device attached to a mold for applying tension to the skin material, and a movable die of the mold clamping device. A detection device that detects a stroke or time when the plate or the movable mold is clamped, and a skin material gripping control device that outputs a command to the skin material gripping device to change the tension of the skin material by a signal from the detection device. Consists of.

According to a fifth aspect of the invention, a sheet of woven cloth, non-woven cloth, thermoplastic resin or thermoplastic elastomer is formed by using an injection device, a mold clamping device, and a fixed mold and a movable mold attached to the mold clamping device. In a molding device for laminating a skin material and a core resin made of a film, etc., a tension is applied to the skin material attached to a clamping device or a mold, and a predetermined speed is set according to the sandwiching speed of the skin material. With a device for gripping and feeding the skin material that feeds in the direction of the fixed mold with a detector, a detection device that detects the stroke or time during mold clamping of the movable die plate or the movable mold of the mold clamping device, and a signal from the detector. It comprises a skin material gripping and supplying device with a command for changing the skin material tension and a skin material gripping control device for outputting a feed speed command.

In the sixth invention, which is mainly based on the fourth invention,
The grip portion of the skin material gripping device is formed as an integral frame around the entire circumference of the skin material.

According to a seventh aspect of the invention, which is mainly based on the fourth or fifth aspect, the gripping portion of the skin material gripping device has four gripping portions, one on each of the four sides of the skin material, or a peripheral facing surface. Two are provided, one on each of the two sides.

In the eighth invention, which is mainly based on the fourth invention, the fifth invention or the seventh invention, the skin material gripping control device comprises a plurality of gripping portions of the skin material gripping device for applying tension to the skin material, Alternatively, the plurality of gripping portions of the skin material gripping and supplying device that supplies the skin material in the direction of the fixed mold at a predetermined speed according to the sandwiching speed are independently controlled.

In the ninth invention mainly consisting of the fourth invention, the fifth invention, the sixth invention, the seventh invention or the eighth invention, the tension applied to the skin material is different between the front surface and the back surface of the skin material. It is composed of a gripping part that applies a compressive force between the two.

In the tenth invention mainly consisting of the fourth invention, the fifth invention, the sixth invention, the seventh invention or the eighth invention, the tension applied to the skin material is obtained by directly gripping the skin material. It consists of a gripping part.

In the eleventh invention, which is mainly composed of the fifth invention, the seventh invention, the eighth invention, the ninth invention, or the tenth invention, the skin material is supplied at a predetermined speed. At least the front surface or the back surface is composed of a grip portion that applies a compressive force.

In the twelfth aspect of the invention, which is mainly comprised of the fifth to eleventh aspects, the tension applied to the skin material is a hydraulic cylinder, an electric motor, or a gripping portion generated by a magnet.

[0017]

According to the above structure, when the skin material and the core resin are bonded together, the skin material is adjusted in accordance with the stroke or the time when the movable die plate or the movable die of the mold clamping device is clamped. A predetermined variable tension applied directly to or a variable tension generated by a gripping force (compressive force) pressing the skin material is applied. At this time, the skin material is given a variable feed amount in the clamping direction of the movable mold. The tension of the skin material or the feed amount of the skin material is independently set, or both the tension of the skin material and the feed amount of the skin material are variable, so that the mold is clamped and the skin material is inserted into the mold. Finally, the slip between the skin material and the fixed frame and between the skin material and the female mold is reduced, and the skin material is not torn or wrinkled. In addition, even in deep-drawn products and molded products such as complicated shaped products, the tension acting on the skin material and the amount of deformation due to this are made almost uniform, so partial tears, damages and wrinkles are prevented, and the appearance Quality is improved.

[0018]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows an injection compression molding machine 1 of the present invention.
FIG. 2 is an external view of the laminating and molding apparatus 8, and FIG. 2 is a schematic diagram of a first embodiment of the injection compression molding machine 1 and the laminating and molding apparatus 8 for explaining the present invention. 3 and 4 are time charts of the first embodiment of the injection compression molding machine 1 and the laminating and molding apparatus 2, FIG. 3 is a time chart of the movable die plate during injection and injection compression molding of the plastic, and FIG. FIG. 4 is a time chart diagram of tension (P) between the movable die plate 22 and the skin material.

1 and 2, an injection compression molding machine 1 comprises an injection device 2, a mold clamping device 3 and a control device 4 (shown in FIG. 2). In FIG. 2, the laminating / molding device 8 includes a skin material gripping device 40 and a skin material gripping control unit 50. The injection device 2 is provided with an injection cylinder part 190 for injecting a plastic material to the mold clamping device 3 as in the conventional case, and the injection cylinder part 190 is a slide cylinder (not shown) fixedly mounted on the heating cylinder 191. It is mounted so as to be slidable in the fixed mold 11 direction. A screw 192 is closely inserted into the heating cylinder 191 of the injection cylinder unit 190, and the screw 192 slides in the direction of the mold by driving a hydraulic cylinder (not shown) to inject a plastic material.

In FIGS. 1 and 2, the clamping device 3 comprises a support column 5, a fixed die plate portion 20 and a movable die plate portion 10. The fixed die plate portion 2 is provided in the middle of the support column 5.
0 is fixed, and the fixed die plate portion 20 is fixed to the fixed mold 11
And a fixed die plate 12 that holds the fixed mold 11. Further, the movable die plate portion 10 is disposed on the support column 5, and the movable die plate portion 10 includes a movable die 21 and
It comprises a movable die plate 22 which holds a movable mold 21 and is slidably attached to the column 5. Further, in the movable die plate portion 10, a mold clamping cylinder 23 that presses a movable die plate 22 that is slidably guided by the column 5 toward the fixed die plate 12 during mold clamping, and a mold clamping cylinder 23.
An electromagnetic switching valve 24 that operates by a command from a control device 4 that supplies hydraulic pressure to the hydraulic pressure control valve, an electromagnetic proportional pressure valve 25 that increases or decreases the pressure of resin, a variable pump 26 that is a hydraulic pressure supply source, and a tank 27 that stores oil. It is arranged.

The control device 4 is arranged between the mold clamping controller 30 for controlling the mold clamping process and the injection process, and the movable die plate 22 and the fixed die plate 12, and controls the movable mold 21 with respect to the fixed mold 11. A position sensor 31 for detecting the distance, a die stroke setting means 32 for inputting a change position of the operating speed of the movable mold 21 which is set according to the material of the skin material Mm and the product shape, or the pressure and the change position of the pressure. And pressure setting means 33 for setting the time,
It comprises an operating speed setting means 34 for setting the operating speed of the movable mold, that is, the discharge amount of the pump 26 in this embodiment. The mold clamping controller 30 includes a die stroke setting means 32,
The input command from the pressure setting means 33 or the operating speed setting means 34 is stored, the input signal from the position sensor 31 is obtained, and the command is output to the variable pump 26, the electromagnetic switching valve 24, and the electromagnetic proportional pressure valve 25. Further, the mold clamping controller 30 obtains an input signal from the position sensor 31 and outputs the signal to a skin material grip control unit 50 described later.

Skin material gripping device 4 of the laminating / molding device 8
0 is the cylinders 41a and 41b attached to the fixed die plate 12 of the clamping device 3, the rod 42a of the cylinder,
A holding member 4 for holding the periphery of the skin material connected to 42b.
3a, 43b, pumps 44a, 44b for supplying pressure to the cylinders 41a, 41b, and pumps 44a, 44b
It is composed of electromagnetic proportional pressure valves 45a, 45b for setting the pressure of the fluid from and controlling the gripping force of the skin material, and the tank 27. Although two cylinders are shown in the drawing, two or more cylinders may be used without being restricted. Skin material grip control unit 5
0 is a gripping force program generator 50a, a gripping force for setting a variable (including stepwise change) gripping force of the skin material, a gripping force changing position and a change time setting device 50b (hereinafter, position setting device 50b). ), Amplifiers 53a and 53b for amplifying command output, gripping force input means 51 for inputting holding force, and position input means 52 for inputting die stroke (position). In the skin material grip control unit 50,
Die stroke setting means 32 or pressure setting means 33
Receives a signal from the position sensor 31 that detects the operating speed and the position where the operating speed is changed, and receives a command from the mold clamping controller 30 that outputs a command to the variable pump 26 and the electromagnetic proportional pressure valve 24. The gripping force for setting the gripping force of the robot and the signal from the position setter 50b are received, and the holding force program generator 50a transmits the signal to the amplifier 5
A command is output to the electromagnetic proportional pressure valves 45a and 45b via 3a and 53b.

Next, the operation of the first embodiment of the injection compression molding method and the laminating molding method of the plastic material will be described. First, from the operating speed setting means 34, the operating speed (V) of the movable mold 21 in the pressing process that matches the product shape such as the material of the skin material Mm, the size, the thickness, or the drawing depth is set by the operating speed setting means 34. The change position (Y) or the time (t) of the above is input to the die closing controller 30 from the die stroke setting means 32, and the holding pressure (Pp) of the pressurizing process is input from the pressure setting means 33. At this time, the relationship between the operating speed of the movable mold 21 and the changing position of the operating speed and the injection amount from the injection cylinder is input to the mold clamping controller 30. Further, similarly, the gripping force (P) of the skin material that matches the product shape is input to the gripping force and position setter 50b from the gripping force setting unit 51, and the changed position (y) of the gripping force is input to the gripping force and position setter 50b. To do. It should be noted that, in the above, in the pressing process, an example in which the operating speed change position (Y) and the gripping force change position (y) are normally matched is shown.

First, the relationship between the injection of the plastic material from the injection cylinder 190 and the operation of the movable die plate during injection compression molding will be described with reference to FIG. Movable die plate 21
Is a predetermined position Y by high speed rapid _feed from the mold fully open position Y _{A1.
It is} sent to _A2 , where it is decelerated and sent to a predetermined position Y ₁ by low speed fast feed and stopped. This position is the movable mold 21
The fixed mold 11 is in the open position, and the movable mold 21 is in the vicinity of the skin material 8, preferably in the non-contact position. At this position Y ₁ , while changing the injection flow rate from time s ₁ to time s ₂ , the plastic material 200 is fixed from the injection cylinder 190 to the fixed mold 11 and the skin material M.
a control device (not shown) into the cavity 9 between the m emitted by controlling the screw 192 predetermined initial injection amount (u _p). Initial injection amount by a position sensor disposed in the injection cylinder 190 (not shown) _{(u p = u 1 -u 2} ))
Is detected, the movable die plate 21
To start the process of closing the press. While closing at the operating speed (V) of the predetermined movable mold set in sequence, the plastic material 200 is sequentially injected from the injection cylinder unit 190 at a predetermined injection flow rate, and the time is s ₃ earlier than the time s _{4 at which the} mold is closed.
The injection ends with. After time s _4, the pressure holding process is started.

Next, regarding the operation relationship between the movable die plate 22 and the gripping force (P) of the skin material at the time of injection compression molding,
This will be described with reference to FIG. The movable die plate 22 is at the mold fully open position Y.
_It is sent from _A1 to a predetermined position Y ₁ by high-speed and low-speed fast-forwarding, and stops at time (t ₁ ) and waits. At this predetermined position Y ₁ or time (t ₁ ), the gripping force program generator 50a of the skin material gripping control unit 50 receives a signal from the mold clamping controller 30 and a signal from the gripping force setting device 50b. Receiving electromagnetic proportional pressure valves 45a, 45
b to output commands to the electromagnetic proportional pressure valves 45a, 4
5b is adjusted to a predetermined pressure. This pressure is applied to the cylinder 41
It acts on the rod side of a and 41b, and rods 42a and 42b
A downward pushing force shown in FIG. Due to this pushing down force, the gripping members 43a and 43b fix the skin material to the mold 1
Then, the skin material is held at one end with a predetermined holding force P ₁₀ and the other end with a predetermined holding force P ₂₀ .

By the time (t ₂ ), the plastic material 200 is injected by a predetermined initial amount u _p . At time (t ₂ ), the mold closing controller 30 switches the electromagnetic switching valve 24, the pressure oil of the variable pump 26 is discharged to the mold clamping cylinder 23, and the movable mold 21 is lowered at the operating speed (V ₁ ). . At this time, the gripping force program generator 50b
While receiving the signal from the mold clamping controller 30,
Upon receiving a signal from the gripping force setting device 50a, commands are output to the electromagnetic proportional pressure valves 45a and 45b, respectively, and the electromagnetic proportional pressure valves 45a and 45b are adjusted to a predetermined pressure. The skin material receives the force of the gripping members 43a and 43b in the same manner as described above, and one end is changed to a predetermined holding force P ₁₁ and the other end is changed to a predetermined holding force P ₂₁ . At this time, one end of the skin material has a predetermined holding force P ₁₁
Since the other end is gripped with a predetermined holding force P ₂₁ and is pushed downward by the movable mold 21 at the operating speed (V ₁ ), the predetermined tension (the gripping members 43a and 43b and the fixed mold 11) Due to the friction between the two, one end is αP ₁₁ and the other end is αP ₁₁ .
Has received the P _21).

Further, when the movable mold 21 descends and reaches the mold clamping position (Y ₂ ), the position sensor 31 detects it and sends a signal to the mold clamping controller 30. The mold clamping controller 30 changes the discharge amount of the variable pump 26 and lowers the movable mold at the operating speed (V ₂ ). Also at this time,
The gripping force program generator 50a receives a signal from the mold clamping controller 30 and also receives the gripping force setting device 50b.
In response to the signal from the control unit, commands are output to the electromagnetic proportional pressure valves 45a and 45b, respectively, and the gripping force of the skin material (P
₁₂ ) and (P ₂₂ ) are changed to a predetermined tension (one end is αP ₁₂ ,
The other end gives αP ₂₂ ) to the skin material. Similarly, in the figure, the time (t ₅ ) of the pressing process is controlled, and then the pressing process is started.

In the pressurizing step, when the movable mold 21 descends and reaches the mold clamping position (Y _vp ), the position sensor 31 detects it and sends a signal to the mold clamping controller 30. The mold clamping controller 30 further reduces and discharges the variable pump 26, and outputs a command to the electromagnetic proportional pressure valve 25 to apply a holding pressure (Pp ₁ ) to the mold clamping cylinder 23. At this time, the discharge amount of the variable pump is reduced to reduce energy and prevent temperature rise. At this time, the gripping force program generator 50a
While receiving the signal from the mold clamping controller 30,
Upon receiving a signal from the gripping force setting device 50b, a command is output to the electromagnetic proportional pressure valves 45a and 45b to change the gripping force (P ₁₄ ) and (P ₂₄ ) of the skin material. After pressing the skin material and the plastic material for a predetermined time (T ₁ ) with the holding pressure (Pp ₁ ), the holding pressure (Pp ₂ ) shifts to the next holding force (P ₁₅ ), ( P ₂₅ ), and change the time (T ₂ )
Press the skin material and plastic. When the predetermined pressurizing process is sequentially completed, the mold closing controller 30 causes the electromagnetic switching valve 24
, The movable mold 21 is raised, and the bonded molded product is taken out. Thus, by selecting holding pressure (Pp _n) and the gripping force of the skin material 8 (Pp _n) and the injection amount of the plasticizer was appropriately, it is possible to damage of the skin material, to prevent wrinkles. Although the tension in FIG. 4 is shown in a stepwise solid line, it may be variably controlled in a ramp shape shown by dotted lines (w) and (v). Below, although similar, it demonstrates in steps.

FIG. 5 is a schematic diagram of a second embodiment of an injection compression molding machine and a bonding molding apparatus for explaining the present invention.
The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The skin material gripping device 60 includes cylinders 61 a and 61 b attached to the fixed die plate 12 of the mold clamping device 3.
Holding members 63a and 63b for directly holding the periphery of the skin material attached to the rods 62a and 62b of the cylinder, and the cylinder 61.
a, a pump 64 for supplying pressure to the cylinders 61a, 61b, electromagnetic pressure reducing valves 65a, 65b for setting the pressure of the fluid from the cylinders 61a, 61b and controlling the holding force of the skin material, and the cylinder 6
1a, 61b to switch the oil supply to the cylinders 61a, 6
The electromagnetic switching 66 for switching the operation of 1b and the tank 27
And consists of.

Next, the operations of the injection compression molding method and the laminating molding method of the plastic material of the second embodiment will be described. Since they are almost the same as those of the first embodiment, the operation will be described with reference to FIGS. Differences from one example will be described. At the predetermined position Y ₁ or time (t ₁ ), the gripping force program generator 50 a of the skin material gripping control unit 50 causes the mold clamping controller 30 to move.
With receives a signal from, the gripping force setting unit 50b receives a signal from the solenoid pressure reducing valve 65a, respectively outputs a command to 65b, the holding force P ₁₀ skin material end is predetermined, the other end is also one anti of The holding force is held by a predetermined holding force P _{20 that} is the same as the predetermined holding force P ₁₀ (the set pressure may be different or the same). Next, plastics 200 until the time (t ₂₎ is injected by a predetermined initial amount u _p. Time (t
₂ ), the electromagnetic switching valve 24 is switched by the mold clamping controller 30, the pressure oil of the variable pump 26 is discharged to the mold clamping cylinder 23, and the movable mold 21 is lowered at the operating speed (V ₁ ) to move the movable mold. The mold 21 and the skin material 8 are brought into contact with each other and the drawing is performed.

At this time, the gripping force program generator 5
0a receives a signal from the mold clamping controller 30 and also receives a signal from the gripping force setting device 50b to output a command to the electromagnetic switching 66 and the electromagnetic pressure reducing valves 65a and 65b, respectively, to switch the electromagnetic switching 66 to the port position ( At the same time, the pressure control of the electromagnetic pressure reducing valves 65a and 65b is changed to a predetermined holding force P ₁₁ at one end and a predetermined holding force P ₂₁ at the other end. The electromagnetic pressure reducing valves 65a and 65b are actuated by the tension of the skin material 8 generated by the lowering of the movable mold 21, and give a predetermined tension to the skin material 8. The predetermined holding force P ₁₁ (corresponding to the tension P ₁₁ applied to the skin material in this case) and the predetermined holding force P ₂₁ (corresponding to the tension P ₂₁ ) at this time are set to optimum tensions according to the shape and the like. It The holding force P ₁₁ and the holding force P ₂₁ may be the same or different, but when they are different, the tension applied to the skin material at one end is P ₁₁ and the other end is different tension P _21. Occur. In the following, the electromagnetic pressure reducing valve 6 is used in the same manner as the electromagnetic proportional pressure valves 45a and 45b of the first embodiment.
5a and 65b are controlled to change the tension. In the present invention, since the tension is directly applied to the skin material, the accuracy is improved.

FIG. 6 is a schematic view of a third embodiment of an injection compression molding machine and a bonding molding apparatus for explaining the present invention.
FIG. 7 is a time chart diagram of a third embodiment of the injection compression molding machine and the lamination molding apparatus, and is a time chart diagram of the gripping force (P) between the movable die plate 22 and the skin material. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The laminating / molding device 8B includes a skin material gripping and supplying device 70 (hereinafter referred to as skin material supplying device 70) and a skin material gripping control unit 80. The skin material supplying device 70 is held by brackets 71a and 71b attached to the fixed die plate 12 of the clamping device 3 and motors 72a and 72.
It is composed of supply rollers 73a and 73b driven by b, and gripping roller portions 75a and 75b attached to the support wall 74 from the fixed die plate 12 and the like. Gripping roller section 75
Is a gripping roller 76 that makes contact with the skin material and grips it with the supply rollers 73a and 73b, and that makes the gripping force variable.
a, 76b, a spring 77 for pressing the gripping rollers 76a, 76b, ball screws 78a, 78b for varying the mounting load of the spring 77, and servomotors 79a, 79b for moving the ball screws 78a, 78b.

The skin material grip control unit 80 includes a grip force program generator 80a and a skin material feed amount program generator 8
0b, a variable (including stepwise change) gripping force of the skin material, a gripping force for setting the feed amount, a feed amount changing position setter 80c, and an amplifier 81a for amplifying the command output.
81b, 81c, and 81d, a signal inverter 82 that outputs a feed amount command in the opposite direction to the motor 72a and the motor 72b, and pulse generators 83a and 83b that detect the rotation angle (feed amount) of the motors 72a and 72b. Become. Further, a gripping force input means 85 for inputting a holding force,
Position input means 86 for inputting the die stroke (position) or time and feed amount input means 87 for inputting the feed amount are additionally provided. In the skin material gripping control unit 80, the variable pump 26 and the electromagnetic proportional pressure valve 24 receive signals from the position sensor 31 that detects the operating speed and the position where the operating speed is changed from the die stroke setting unit 32 or the pressure setting unit 33. In addition to receiving a command from the mold clamping controller 30 that outputs a command, a gripping force program for the variable gripping force of the skin material, a gripping force for setting the feed amount, and a signal from the feed amount changing position setting device 80c. Generator 8
0a through the amplifiers 81a and 81b to the servo motor 79
The command is output to the motors 72a and 72b via the feed amount program generator 80b and the amplifiers 81c and 81d.

Next, the operation of the third embodiment of the injection compression molding method and the laminating molding method of the plastic material will be described. First, similar to the first embodiment, the operating speed (V) of the movable mold in the pressing process is adjusted from the flow rate setting means 34 according to the product shape.
The change position (Y) or time (t) of the operating speed is input to the die closing controller 30 from the die stroke setting means 32, and the holding pressure (Pp) of the pressurizing process is input from the pressure setting means 33. At this time, the operating speed of the movable mold and the relationship between the changing position of the operating speed and the injection amount from the injection cylinder are input to the mold closing controller 30. Further, similarly, the gripping force (P) of the skin material matched to the product shape is input from the gripping force input means 85, and the changed position (y) or time (Sn) of the gripping force is input to the die stroke (position). The holding force, the changed position, or the feed amount is changed by the means 86 and the feed amount input means 87 for inputting the feed amount of the skin material.
Enter in c. It should be noted that, in the above, in the pressing step, an example is shown in which the changing position (Y) of the operating speed and the changing position (y) of the gripping force are not normally matched.

Next, the relationship between the stroke position of the movable die plate 22 and the tension (P) of the skin material and the feed amount at the time of injection compression molding will be described. FIG. 7 shows the stroke position and the tension (P) of the skin material. The movable die plate 22 is sent from the fully opened position Y _{A1 of the} mold to the predetermined position Y ₁ by high-speed and low-speed rapid feed, stopped at time (t ₁ ), and stands by. At this predetermined position Y ₁ or time (t ₁ ), the gripping force program generator 8 of the skin material gripping control unit 80.
0a receives a signal from the mold clamping controller 30 and outputs a command from the gripping force program generator 80a to the servomotors 79a and 79b via the amplifiers 81a and 81b in response to the signal from the gripping force setter 80c. Servo motors 79a, 79b are ball screws 78a,
78b is rotated and moved to press the spring 77. Thus, the mounting load of the spring 77 is variable, the skin material 8 is subjected to the force of the grip spring 77 roller 76a, at 76 b, one end at a predetermined holding force P _30, the other end a predetermined holding force P
Holds at ₄₀ .

By the time (t ₂ ), the plastic material 200 is injected by a predetermined initial amount u _p . At time (t ₂ ), the mold closing controller 30 switches the electromagnetic switching valve 24, the pressure oil of the variable pump 26 is discharged to the mold clamping cylinder 23, and the movable mold 21 is lowered at the operating speed (V ₁ ). At the same time, in order to feed the skin material, the motor 72a is fed from the feed amount program generator 80b through the amplifiers 81c and 81d.
A command is output to 72b at a predetermined feed amount and then at a predetermined feed speed (for example, a predetermined motor rotation speed βV ₁ ).
When the pulse generators 83a and 83b reach the predetermined feed amount x ₁ , the motors 72a and 72b are stopped.
As a result, the skin material 8 is sent into the fixed mold 11 by the movable mold 21 at the operating speed (V ₁ ) and is also gripped by the gripping rollers 76a and 76b while the motor 72 is being held.
The feed rollers 73a and 73b driven by a and 72b provide a predetermined feed rate βV ₁ (where β is 1 or less) with a predetermined feed amount x _{1 of the} movable mold 21 and the fixed mold 11
Is supplied in the direction of. At this time, at the predetermined position y ₂ or time (Sn ₂ ) while being fed into the fixed mold 11 by the movable mold 21 at the operating speed (V ₁ ), the gripping force program generator 80 a clamps the mold. In addition to receiving a signal from the controller 30 and a signal from the gripping force setter 80c, the gripping force program generator 80a outputs commands to the servomotors 79a and 79b in the same manner as described above to press the spring 77, Roller 76 receives the force of 77
a and 76b, one end of the skin material 8 has a predetermined holding force P ₃₁ ,
The other end is changed to be held with a predetermined holding force P ₄₁ . As a result, the skin material 8 receives a stronger gripping force, and therefore, for example, even if it is sent into a deeper mold, it is sent into the fixed mold 11 without loosening.

Further, when the movable mold 21 descends and reaches the mold clamping position (Y ₂ ), the position sensor 31 detects it and sends a signal to the mold clamping controller 30. The mold clamping controller 30 changes the discharge amount of the variable pump 26 and lowers the movable mold at a low speed of the operating speed (V ₂ ). As a result, the skin material 8 is prevented from being suddenly pushed in by the movable mold 21, and for example, even if it is sent into a deeper mold, it is sent into the fixed mold 11 without stretching.
At this time, in order to feed the skin material 8, the feed amount program generator 80b passes the amplifiers 81c and 81d to the motors 72a and 72b at a given feed amount x ₂ at a given feed speed (for example, when a given motor is rotated). Speed βV ₂ ) command is output. Further, at this time, at the predetermined position y ₃ or time (Sn ₃ ) while being fed into the fixed mold 11 by the movable mold 21 at the operating speed (V ₂ ), the rollers 76a and 76b are similarly operated as described above. The holding force of the skin material 8 is changed to a predetermined holding force P ₃₂ at one end and a predetermined holding force P at the other end.
Change to ₄₂ .

Similarly, in the figure, up to the die knitting position (Y _vp ) in the pressing process is controlled in the same manner, and then the pressing process is started. In the pressurizing step, when the movable mold 21 descends and reaches the mold clamping position (Y _vp ), the position sensor 31 detects and sends a signal to the mold clamping controller 30. Mold clamping controller 30
Discharges the variable pump 26 with a further reduced discharge amount, outputs a command to the electromagnetic proportional pressure valve, and applies a holding pressure (Pp ₁ ) to the mold clamping cylinder 23. Holding pressure (Pp
During the pressing step of ₁ ), the movable mold 21 is further moved by the cooling of the resin until it stops at time t ₆ . The position sensor 31 detects the position y _st of the movable mold 21 during this movement (or time Sn ₅ ), and the rollers 76a, 76 are moved in the same manner as described above.
By changing the pressing force of b, the gripping force of the skin material 8 is changed to a predetermined holding force P ₃₄ at one end and a predetermined holding force P ₄₄ at the other end.
At the same time, the gripping force program generator 80a starts the timer T _t1 . At this time, the skin material 8 may be fed by the supply rollers 73a and 73b when the moving amount of the movable mold 21 due to the cooling of the resin is large, and may not be fed when the moving amount is small. Further, when the resin is cooled and the movable mold 21 is stopped at the time t ₆ , the rollers 76a and 76b are operated in the same manner as described above, and one end has a predetermined holding force P.
₃₅ , the other end is changed to a predetermined holding force P ₄₅ , and the holding force of the skin material 8 is changed.

After pressing the skin material and the plastic material for a predetermined time (T ₁ ) with the holding pressure (Pp ₁ ), the next holding pressure (Pp ₂ ) is entered. Further, when T _x1 is timed up in the middle of the process, it is started at T _t2 and the gripping force (P ₃₅ ) of the skin material 8 (P ₄₅ ) to the gripping force (P ₃₆ ),
(P ₄₆ ) and press the skin material and the plastic material for a predetermined time (T _tn ). The predetermined holding pressure is gradually reduced, and when the pressurizing process is completed after a predetermined time (T ₃ ), the mold closing controller 30 switches the electromagnetic switching valve 24,
The movable mold 21 is raised to take out the bonded molded product. Thus, holding pressure (Pp _n) and the gripping force of the skin material 8 (Pp _n) and x ₁ ~ not feed amount shown of the skin material
By appropriately selecting x _n , friction between the skin material and the roller can be reduced, damage to the skin material, wrinkles can be prevented, or adhesiveness can be improved.

FIG. 8 is a schematic view of a fourth embodiment of an injection compression molding machine and a laminating molding apparatus for explaining the present invention.
The same parts as those in the third embodiment are designated by the same reference numerals and the description thereof will be omitted. The laminating / molding device 8D includes a skin material gripping device 90 and a skin material gripping control unit 100. The skin material grip 90 is held by a bracket (not shown) attached to the fixed die plate 12 of the mold clamping device 3, and the motor 9
Gripping rollers 92a, 92b driven by 1a, 91b
And gripping receiving rollers 93a and 93b attached to the fixed die plate 11 and the like. Gripping rollers 92a, 92
b is a gripping receiving roller 93a, 93b in contact with the skin material
With the motors 91a and 91b, the motors 91a and 91b grip with a variable gripping force according to the rotational torque. The skin material grip control unit 100 includes a skin material grip position program generator 100a and a skin material 8
Gripping force program generator 100b, a gripping force and change position setting device 100c that sets a variable (including stepwise change) gripping force and position of a skin material, and a positioning amplifier that amplifies an output of a command for positioning. 101a, 101
b, switches 102 and 103 for switching between the position command B and the tension command C by the switching signal A, the motor 91a,
91b current detection resistors 104a and 104b, current feedback amplifiers 105a and 105b, motor current amplifiers 106a and 106b, and motors 91a and 91b.
Generator 10 for detecting the rotation angle (feed amount) of
7a and 107b. Further, a gripping force input means 85 for inputting a holding force and a position input means 86 for inputting a die stroke (position) or time are additionally provided.

In the skin material grip control section 100, the signal from the position sensor 31 for detecting the operating speed and the position where the operating speed is changed from the die stroke setting means 32 or the pressure setting means 33 of the mold clamping controller 30, and the variable pump 26. And a command from the mold clamping controller 30 which outputs a command to the electromagnetic proportional pressure valve 24, and a signal from the holding force for setting the variable gripping force of the skin material and the gripping force changing position setter 100b, From the holding force program generator 100a through the switches 102 and 103 and the motor current amplifiers 106a and 106b, the motor 91a,
A command for controlling the gripping force is output to 91b, and the command is output to the motors 91a and 91b.

Next, the operation of the injection compression molding method and the laminating molding method of the plastic material of the fourth embodiment will be described. Since they are almost the same as the third embodiment, the first embodiment will be described with reference to FIG. Describe the difference with. First, in order to apply tension to the skin material only by the motors, the two motors are rotated in opposite directions to generate torque. At this time, the motor generated torque Mt = (motor torque constant Kt) ×
Since it is (motor current Mi), the tension of the skin material will be described as motor current Mi in order to facilitate the description below.
Time (t ₁ ) when the movable die plate 22 is sent to a predetermined position Y ₁ from the fully opened position Y _{A1 of the} die by high speed and low speed fast feed.
It stopped at and was waiting. At this predetermined position Y ₁ or time (t ₁ ), the gripping force program generator 100a of the skin material gripping control unit 100 receives a signal from the position sensor 31 and a signal from the gripping force setting device 100b. The holding force program generator 100a switches the switches 102 and 103 by the switching signal A, and outputs respective tension commands to the motors 91a and 91b via the motor current amplifiers 106a and 106b. The motors 91a and 91b rotate the gripping rollers 92a and 92b in opposite directions, grip the skin material 8 between the gripping rollers 93a and 93b, and have a predetermined holding force P ₃₀ at one end.
A predetermined holding force P _{40 is applied to} the other end.

By the time (t ₂ ), the plastic material 200 is injected by a predetermined initial amount u. At time (t ₂ ),
The mold switching controller 30 switches the electromagnetic switching valve 24, discharges the pressure oil of the variable pump 26 to the mold clamping cylinder 23, and lowers the movable mold 21 at the operating speed (V ₁ ).
At this time, the gripping force program generator 100a is operated at a predetermined position y ₂ or time (Sn ₂ ) while being fed into the fixed mold 11 by the movable mold 21 at the operating speed (V ₁ ).
Is supplied to the motor 9 via the motor current amplifiers 106a and 106b.
The respective tension commands are output to 1a and 91b, and a predetermined holding force P ₃₁ is applied to one end and a predetermined holding force P _{41 is applied to} the other end. As a result, the skin material is sent into the fixed mold 11 at a predetermined operating speed (V ₁ ) without being loosened while being further tensioned by the gripping rollers 92a and 92b by the movable mold 21.

Further, when the movable mold 21 descends and reaches the mold clamping position (Y ₂ ), the position sensor 31 detects it and sends a signal to the mold clamping controller 30. The mold clamping controller 30 changes the discharge amount of the variable pump 26 and lowers the movable mold at a low speed of the operating speed (V ₂ ). As a result, the skin material is prevented from being suddenly pushed by the movable mold 21, and for example, even if it is sent into a deeper mold, it is sent into the fixed mold 11 without stretching. Further, at this time, at the predetermined position y ₃ or time (Sn ₃ ) on the way of being moved into the fixed mold 11 by the movable mold 21 at the operating speed (V ₂ ), the gripping force program generator is similar to the above. 100a is a motor current amplifier 106a, 106b
Then, the respective tension commands are output to the motors 91a and 91b to change the tension to a predetermined holding force P ₃₂ at one end and a predetermined holding force P _{42 at} the other end.

Similarly, in the figure, up to the die knitting position (Y _vp ) in the pressing process is controlled, and then the pressing process is started. Even in the pressurizing step, the mold clamping controller 30 controls the same as in the third embodiment, and the gripping force program generator 100a.
Is supplied to the motor 9 via the motor current amplifiers 106a and 106b.
The respective tension commands are output to 1a and 91b, and the tension is appropriately changed by the gripping rollers 92a and 92b even during the pressing process. When the pressurizing process is completed and the molded product is taken out, the switches 102 and 103 are switched to the position command B by the switching signal A from the gripping force program generator 100a.
Positioning amplifier 1 from gripping force program generator 100a
01a, 101b, switches 102, 103, motor current amplifiers 106a, 106b, and resistors 104a, 1
A command is sent to the motors 91a and 91b via 04b to loosen the tension of the skin material. At this time, the pulse generator 10
The motors 91a and 91b are rotated until 7a and 107b detect the position where the tension of the skin material is relaxed. When the position is detected, the motors are stopped and the molded product is taken out.

FIG. 9 is a schematic view of a fifth embodiment of a horizontal injection compression molding machine and a bonding molding apparatus for explaining the present invention. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In FIG. 9, a fixed die plate 112 holding a fixed mold 111 is fixed to one end of a bed (not shown) such as a horizontal injection molding machine, and a movable die plate 122 is slidably and pivotally mounted on the fixed die plate 112. A plurality of tie bars 123 to be held are fixedly provided. The other end of the tie bar 123 is slidably supported by a bracket fixed to one end of a bed (not shown). The fixed die 111 is attached to one end side of the fixed die plate 112, and the injection cylinder portion 190 is arranged on the other end side of the fixed die plate 112. The nozzle 113 of the injection cylinder 191 is provided through a hole 113 provided in the fixed die plate 112. Contacts the fixed mold 111, and the resin is injected into the cavity 114 through the sprue of the fixed mold 111. The movable die plate 122 is supplied with a mold clamping cylinder 23 that presses the movable die plate 122, which is slidably guided by the tie bar 123, toward the fixed die plate 112 during mold clamping, and a hydraulic pressure to the mold clamping cylinder 23. An electromagnetic switching valve 24 that operates according to a command from the mold clamping controller 30, an electromagnetic proportional pressure valve 25 that increases / decreases the pressure of resin, a variable pump 26 that serves as a hydraulic pressure supply source, and a tank 27 that stores oil are provided. . Further, the movable die plate 122 and the fixed die plate 112 are connected by an opening / closing hydraulic cylinder (not shown) that quickly opens and closes the movable die plate 122.
Is provided.

The laminating / molding device 8E comprises a skin material gripping device 140 and a skin material gripping controller 150. The skin material gripping device 140 includes the movable die plate 122 of the clamping device 3.
141 attached to the coil 141, and plungers 142a, 14a slidably disposed in the coil 141 and held slidably by the movable die plate 22 to press the skin material.
2b and. The skin material gripping control unit 150 amplifies the holding force program generator 150a, a holding force and position setting device 150b that sets a variable (including stepwise change) gripping force of the skin material, and a coil command output. Amplifier 15
1a, 151b and a gripping force input means 1 for inputting a holding force
51 and setting means 1 for inputting the die stroke (position)
And 52. In the skin material gripping control unit 150, the variable pump 26 and the electromagnetic proportional pressure valve 25 receive signals from the position sensor 31 for detecting the operating speed and the changed position of the operating speed from the die stroke setting unit 32 or the pressure setting unit 33. Mold clamping controller 30 that outputs commands
From the holding force program generator 150a and the holding force program generator 150a in response to the holding force program for setting the holding force of the skin material 8 and the signal from the position setter 150b.
A command is output to the coils 141a and 141b via a and 151b.

Next, regarding the injection compression molding method and the laminating molding method of the plastic material, the injection cylinder portion 190 will be described.
The relationship between the injection of the plastic material from the mold and the operation of the movable die plate 122 during the injection compression molding is the same as the operation of the first embodiment, and the movable die plate 122 during the injection compression molding is the same.
The relationship between the operation and the gripping force (P) of the skin material is omitted because the electromagnetic proportional pressure valves 45a and 45b that receive a signal from the gripping force setting device 150b may be replaced with the coils 141a and 141b.

FIG. 10 is a schematic diagram of a partially movable mold part showing a sixth embodiment of a horizontal injection compression molding machine and a bonding molding device for explaining the present invention. In FIG. 10, the coils 141a and 141b having the configuration shown in FIG.
The description is omitted because it is the same except that it is attached to No. 1.

FIG. 11 is a diagram showing the arrangement of the grips, FIG. 11 (a) shows an embodiment constituted by the gripping part 165 of an integral frame, and FIG. 11 (b) shows gripping on opposite sides. 11 shows an embodiment in which two parts are arranged 166a and 166b.
(C) shows four grips 167a, 1 on opposite sides of each side.
67b and 168a, 168b are shown in the exemplary embodiment. In addition, although the embodiments of FIGS. 11B and 11C are shown with two pieces in the plan view in the above, the actual arrangement is not limited to the above example, and a plurality of pieces can be arranged according to the shape. Further, the control of each gripping part is controlled independently.

[0051]

As described above, according to the present invention,
As a grip of the skin material in the laminating and forming, a grip unit on the molding machine side or the mold side is provided on the integral frame, or a grip device composed of two or more grip units is provided. The gripping force or the tension applied to the skin material is controlled in multiple stages or continuously variable independently according to the product shape, material, drawing depth, thickness, etc. Even products can be bonded without causing partial tears or wrinkles, and the excellent effect of improving the appearance quality can be obtained.

[Brief description of drawings]

FIG. 1 is an external view of an injection compression molding machine and a laminating molding apparatus for explaining the present invention.

FIG. 2 is a schematic view of a first embodiment of an injection compression molding machine and a laminating molding apparatus for explaining the present invention.

FIG. 3 is a time chart diagram of a movable die plate at the time of injection and injection compression molding of a plastic material for explaining the present invention.

FIG. 4 is a time chart diagram of tensions of a movable die plate and a skin material for explaining the present invention.

FIG. 5 is a schematic view of a second embodiment of an injection compression molding machine and a laminating molding apparatus for explaining the present invention.

FIG. 6 is a schematic diagram of a third embodiment of an injection compression molding machine and a bonding molding apparatus for explaining the present invention.

FIG. 7 is a time chart diagram of a gripping force between a movable die plate and a skin material according to a third embodiment of the present invention.

FIG. 8 is a schematic view of a fourth embodiment of an injection compression molding machine and a laminating molding apparatus for explaining the present invention.

FIG. 9 is a schematic view of a horizontal injection compression molding machine and a bonding molding apparatus according to a fifth embodiment of the present invention.

FIG. 10 is a schematic view of a partially movable mold unit showing a sixth embodiment of the horizontal injection compression molding machine and the laminating molding apparatus for explaining the present invention.

FIG. 11 is a diagram showing an arrangement of gripping portions.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 injection compression molding device, 2 injection device 3 clamping device, 4 control device, 8 laminating molding device, 9
Cavity, 11 Fixed mold 12 Fixed die plate, 21 Movable mold, 22 Movable die plate 23 Mold clamping cylinder, 25 Electromagnetic proportional pressure valve, 30 Mold clamping controller, 31 Position sensor, 32 Die stroke setting means, 33 Pressure setting Means, 34 operating speed setting means, 40 skin material gripping device, 43a,
43b gripping member, 45a, 45b electromagnetic proportional pressure valve,
50 skin material gripping control unit, 50a gripping force program generator, 50b gripping force and gripping force change position setter,

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B29C 45/56 9156-4F 45/76 7365-4F // B29L 9:00 4F 31:58 4F

Claims (12)

[Claims] 1. A method for forming a laminated molded product of a woven fabric, a nonwoven fabric, a sheet of a thermoplastic resin or a thermoplastic elastomer, and a skin material such as a film and a core resin, and a fixed mold and a movable mold. Inserted into the fixed mold by the movable mold injected into the cavity between the two and pasting it together, characterized in that the tension of the skin material can be changed continuously or stepwise according to the amount of insertion of the skin material. Molding method for molded products. 2. The method for molding a bonded molded article according to claim 1, wherein the skin material is slid in the fixed mold direction at a predetermined speed according to the speed at which the skin material is inserted into the fixed mold by the movable mold. 3. The method according to claim 1 or claim 2, wherein the skin material is held at least at two or more locations outside the location where it is inserted into the fixed die by the movable die, and the tension of the skin material at each location is made equal or not. Item 3. A method for forming a molded article of the bonded molded article according to item 2. 4. A woven fabric, a non-woven fabric, a sheet of thermoplastic resin or thermoplastic elastomer, a film, etc., using an injection device, a mold clamping device, and a fixed mold and a movable mold attached to the mold clamping device. In a laminating and forming apparatus for a skin material and a core resin consisting of, a clamping device, or a skin material gripping device attached to a mold to apply tension to the skin material,
A detection device that detects the stroke or time during mold clamping of the movable die plate or movable mold of the mold clamping device,
A molding apparatus for a laminated molded article, comprising: a skin material gripping control device that outputs a command to change the tension of the skin material to the skin material gripping device in response to a signal from the detection device. 5. A woven fabric, a non-woven fabric, a thermoplastic resin or thermoplastic elastomer sheet, a film, etc., using an injection device, a mold clamping device, and a fixed mold and a movable mold attached to the mold clamping device. In the molding machine for laminating the skin material and the core resin, the clamping device or a mold is attached to the mold to apply tension to the skin material, and the skin material is fixed at a predetermined speed according to the insertion speed. And a device for gripping and supplying the skin material and a stroke for clamping the movable die plate or the movable mold of the clamping device, or
It is characterized by comprising a detection device for detecting time, and a skin material gripping control device for outputting a command for changing the tension of the skin material to the skin material gripping and supplying device and a feed speed command by a signal from the detection device. Molding equipment for laminated products. 6. The apparatus for molding a laminated molded product according to claim 4, wherein the gripping portion of the skin material gripping device is formed as an integral frame around the entire circumference of the skin material. 7. The skin material gripping device has four gripping portions, one on each of the four sides of the skin material, or two perimeters facing each other.
The apparatus for molding a bonded molded article according to claim 4 or 5, wherein two pieces, one piece on each side, are arranged. 8. The skin material gripping control device comprises a plurality of gripping portions of the skin material gripping device for applying tension to the skin material, or a skin material that supplies the skin material in a fixed mold direction at a predetermined speed in accordance with a sandwiching speed. The device for molding a bonded molded product according to claim 4, 5, or 7, wherein a plurality of gripping parts of the gripping and supplying device are independently controlled. 9. The method according to claim 4, claim 5, claim 6, claim 7, or claim 8, wherein the tension applied to the skin material comprises a gripping portion that applies a compressive force between the front surface and the back surface of the skin material. Molding device for laminated molded products. 10. The laminated molded article according to claim 4, claim 5, claim 6, claim 7, or claim 8, wherein the tension applied to the skin material is formed by a gripping portion that directly grips the skin material. Molding equipment. 11. The method according to claim 5, claim 7, claim 8, claim 9, or claim 10, wherein the skin material is supplied at a predetermined speed by a gripping portion that applies a compressive force to at least the front surface or the back surface of the skin material. Molding equipment for laminated products. 12. The apparatus for molding a laminated molded product according to claim 5, wherein the tension applied to the skin material is a hydraulic cylinder, an electric motor, or a gripping portion generated by a magnet.