JPH0911273A - Method and device for molding laminated molding - Google Patents

Abstract

PURPOSE: To prevent irregular thickness of a laminated molding by a method wherein a skin material is supplied, a melted resin is patterned in a mold and the skin material is laminated on the surface at the same time, it is cooled and solidified so as to obtain a molding which comprises a core material of a thermoplastic resin and the skin material. CONSTITUTION: A skin material 50 is supplied in between opened movable mold 2 and fixed mold 4 and the movable mold 2 is gradually lowered. The skin material 50 is pinched by the molds 2 and 4. Remaining air in between the skin material 50 and the movable mold 2 is deaerated by a vacuum pump 60 so as to stick to the mold face of the movable mold 2, and the molds are clamped in a state that a space of a cavity 45 is ensured. Before charging of a core material resin, when leveling adjustment of the removable mold 2 is performed, a leveling adjustment control is performed so as to make a detection signal from each load sensor 30 become the same with an initial set value in a state that a mold clamping force F0 is added. In this state, the resin is injected for charging. At this time, an adjusting rod 14 is backed until the space of the cavity 45 becomes the same as a mold thickness, so that tilting of the movable mold 2 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for forming a laminated molded product using a precision mold opening control device, and in particular, by controlling the distance between mold surfaces with high accuracy, it has a thin wall shape. The present invention relates to a method and an apparatus for forming a laminated molded product for producing a molded product including an automobile interior part.

[0002]

2. Description of the Related Art Laminated molded products made of a skin material and a core resin have excellent economical properties, light weight and shapeability, and have excellent surface properties such as decorativeness and softness. Therefore, it is widely used in various fields including automobiles and home appliances.

Such a laminated molded article, for example, as disclosed in Japanese Patent Application Laid-Open No. 1-235613, supplies a molten thermoplastic resin between a male and female molding die to which a skin material is supplied, It is manufactured by pressing both molds to shape the molten resin in the molds, at the same time attaching a skin material to the resin surface, and then cooling and solidifying the molten resin.

[0004]

However, in the conventionally known vertical type injection press molding apparatus, since the hydraulic cylinder is used as the adjusting means of the movable platen of the mold clamping apparatus, the following problems occur. Occurs.

(1) Due to the compressibility of the hydraulic oil, the pressure change corresponding to the position change of the hydraulic cylinder is very small, and the response speed is slow. Therefore, it is difficult to control the mold opening with high precision required for molding a thin-walled laminated molded product. (2) Since the control accuracy of the hydraulic cylinder fluctuates due to a change in physical properties of the hydraulic oil (such as a change in viscosity), an error occurs in the mold opening control.

(3) Due to the above (1) + (2), the control accuracy of the movable platen by the hydraulic cylinder is extremely low,
For example, since the limit is about 100 to 50 μm,
In particular, it is difficult to deal with laminating molding that requires highly accurate mold opening control to obtain a thin molded product.

Further, when the molten resin is injected and filled between the fixed mold and the skin material stretched between the movable mold and the fixed mold, the mold position of the movable mold is controlled so that the mold opening amount is increased. The control of the mold opening amount has a great influence on the texture, wall thickness, surface property, and quality of the bonded molded product.

As described above, when an attempt is made to carry out laminating and molding of a particularly thin product using the hydraulic cylinder, it is difficult to carry out desired laminating and molding because the ratio of error to the wall thickness is large. There was a problem. If the core resin is not of uniform wall thickness, it is difficult to obtain sufficient adhesive strength with the welding type skin material. In particular, in the case of a thin-walled product, if the wall thickness is not uniform, the self-held heat of the thin-walled portion is insufficient, and there will be a portion where the skin material cannot be welded sufficiently. For example, 4
Such a problem may occur when the wall thickness is less than or equal to mm, and particularly a thickness of 2 mm or less tends to cause a problem.

Further, in the case of laminating and molding, it is often found that the movable mold is inclined in the process of filling the mold with the resin. Especially in the case of thin-walled laminated products,
The pressure difference between the vicinity of the gate portion and the resin flow end in the cavity becomes large, and bias pressure is often generated due to injection and filling of the resin. This is mainly due to the shape of the molded product and the arrangement of the gates, and in order to eliminate such causes, it is dealt with by changing the product shape, the gate arrangement, and the like. In particular, if the core resin is filled when the mold is tilted, that is, the mold opening amount of both molds is uneven, the thickness of the molded product becomes uneven, and the softness and appearance of the molded product are impaired. In other words, there is a problem that it is difficult to mold a good product.

However, under the present circumstances, there is a problem that it is difficult to change the product shape, and if the gate arrangement is changed, it tends to cause a product defect, and it is practically impossible from the viewpoint of cost and quality. It was

The present invention has been made in view of the above problems, and an object of the present invention is to provide a bonded molded product using a precision mold opening control device having a high accuracy in adjusting a surface distance between a movable platen and a fixed platen. It is an object of the present invention to provide a molding method and apparatus for a laminated molded product, which is capable of preventing uneven thickness and suppressing the error range of the core resin within a few microns so as to perform thin laminated molding.

[0012]

In order to achieve the above object, in the first aspect of the present invention, the movable mold for molding is held by the movable platen and the fixed mold is held by the fixed platen, respectively. Is a mechanism for advancing and retracting with respect to the fixed platen, the movable platen is equipped with a mold clamping mechanism for generating a mold clamping force, and either the movable platen or the fixed platen is moved along the forward and backward movement direction of the movable platen. A rod adjusting part equipped with a mechanical feed mechanism that is mounted so that it can be adjusted, and a prime mover for driving the adjusting rod, and a rod receiving part that is arranged facing the adjusting rod on the other side and a force applied to the rod receiving part. A platen surface distance adjusting mechanism including a plurality of platen surface distance adjusting mechanisms including an adjusting rod receiving portion having a detection unit for detecting A precision mold opening amount equipped with a speed servo control device for controlling the moving amount of the movable platen in the drive system and a mold clamping force control device for controlling the mold clamping force of the mold clamping mechanism based on the output signal output from the force sensor. Using the control device, supply the molten thermoplastic resin to be the skin material and the core material into the molding die,
After molding the molten resin in the mold and at the same time bonding the surface material to the surface, the molten resin is cooled and solidified to form a laminated molded product composed of the core material resin made of the thermoplastic resin and the surface material. I got it.

In the second invention, which is mainly based on the first invention, a mold clamping mechanism is provided so as to correspond to a plurality of singular platen surface distance adjusting mechanisms, and mold compression process control is performed for platen surface distances. A plurality of adjustment mechanisms are used independently or in a plurality of sets, and in a third invention mainly based on the first invention, a mold compression reference point, a mold compression amount, a mold compression force, and a movable force. The rising position of the platen and the wall thickness of the core material resin are stored in the storage unit as set values, and the control values based on these set values are used as output signals to control the drive units of the platen surface distance adjustment mechanism, and force The driving unit of the mold clamping mechanism is controlled by using the result of comparison calculation of the detection signal from the sensor and the set value in the arithmetic processing unit as the output signal of the control value.

In the fourth invention, when the tilted movable platen is corrected in the horizontal direction, a speed servo controller for controlling the moving amount of the movable platen in the drive system of the platen surface distance adjusting mechanism is used for the correction. According to a fifth aspect of the present invention, there is provided a mold clamping force control device that controls a mold clamping force of a mold clamping mechanism that performs leveling adjustment of a movable platen based on an output signal output from a force sensor. According to the invention, the mold compression reference point, the mold compression amount, the mold compression force, the movable platen rising position, the storage unit that stores input values such as the wall thickness of the core material resin as set values, and the detection from the force sensor or the drive motor. An arithmetic processing unit that outputs a control value or a correction value control signal to each drive system of the platen surface distance adjusting mechanism and the mold clamping mechanism by performing a comparative arithmetic process on the signal and the set value, An input / output interface unit for inputting / outputting various detection signals and control signals, a speed servo control device having an input keyboard and a display unit, and a mold clamping force control device are provided, and a force sensor unit and a plurality of platen surface distance adjustments are provided. Each drive unit of the mechanism and the drive unit of the mold clamping mechanism are connected to each other.

[0015]

[Operation] After the skin material is positioned between the movable mold and the fixed mold that have been opened, the movable mold is gradually lowered, and the skin material is sandwiched between the side surfaces of both molds. Then, the vacuum pump evacuates residual air between the skin material and the movable die at the same time to bring it into close contact with the die surface of the movable die, and with the cavity space secured, so-called mold clamping for injection press molding. To do. When the leveling adjustment of the movable die is performed before the filling of the core material resin, the leveling adjustment such that the detection signal (F2) from each force sensor becomes the same as the initial setting value under the condition that the die clamping force F0 is applied. Take control. While maintaining this state, resin is continuously injected and filled in the cavity. At this time, the relationship with the mold clamping force (F0) corresponding to the resin pressure (P1) injected and filled in the cavity is F0> P1. In addition, since the adjusting rod is retracted while rotating the drive motor until the cavity space becomes the same as the molding thickness, the tilt of the movable die is prevented. Further, an unreasonable force generated by injection press molding does not occur in the mold, so that the warp and deformation of the molded product can be suppressed, and the soft feeling of the molded product is not impaired.

[0016]

Embodiments of the laminating and molding method and apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a schematic structure of the whole vertical mold clamping device. The mold clamping device 1 is provided with a movable platen 3 that holds a movable mold 2 that is also an upper mold of a mold for compression molding, and a fixed platen 5 that holds a fixed mold 4 that is also a lower mold. Movable platen 3 fixed platen 5
A mold clamping cylinder 6 that is vertically moved with respect to the movable platen 3 and presses the movable platen 3 toward the fixed platen 5 to clamp between the movable mold 2 and the fixed mold 4 is attached to the cylinder support member 8 and provided. ing.

Columns 7 are provided at the four corners of the upper surface of the fixed platen 5, as shown in FIG.
Further, a cylinder support member 8 is fixed to the upper ends of the four columns 7. The mold clamping cylinder 6 is fixed downward at the center of the cylinder support member 8. Reference numeral 6a is a piston, 6b is a piston rod, 6
Reference symbol c indicates a piston head chamber, and reference symbol 6d indicates a piston rod chamber.

The mold clamping device 1 is provided with a platen inter-plane distance adjusting mechanism (hereinafter referred to as a platen adjusting mechanism) 11 for adjusting the posture of the movable platen 3 to an arbitrary position and angle with respect to the fixed platen 5 side. It is installed. This platen adjusting mechanism 11 is mounted on the movable platen 3 side 4
One movable adjustment unit 12 and four fixed adjustment units 13 mounted on the fixed platen 5 side and provided corresponding to each movable adjustment unit 12 are provided. The movable adjustment units 12 are arranged inside the four columns 7 as shown in FIG.

Further, in each movable side adjusting unit 12, as shown in FIG. 3, the adjusting rod 14 mounted on the movable platen 3 so as to be movable in the vertical movement direction of the movable platen 3.
And a ball screw type feed mechanism 15 for driving the adjusting rod 14 along the movement direction of the movable platen 3.

Here, the adjusting rod 14 is provided with a male screw-shaped screw shaft portion 16 forming a ball screw on the upper side and a spline shaft portion 17 on the lower side. Further, the ball screw type feed mechanism section 15 is provided with a ball screw section 18 and a spline bearing section 19 fixed to the movable platen 3, and a drive motor 20 for rotationally driving the adjusting rod 14. There is. Further, a speed reducer 21 such as a planetary gear device or a cyclo speed reducer is interposed between the drive motor 20 and the adjusting rod 14. The adjusting rod 14 may have a rack and pinion configuration instead of the ball screw configuration, and the same effect can be obtained.

A unit mounting plate 22 is fixed to the upper side of the movable platen 3. This unit mounting plate 22
Guide shafts 23 are respectively provided at the four corners of the above.
A guide plate 24 for holding the speed reducer 21 is vertically movably attached to the four guide shafts 23. The drive motor 20 is attached to the guide plate 24 via a motor attachment member 25.

Further, the rotary shaft 20a of the drive motor 20 is connected to the high speed shaft on the input side of the speed reducer 21. An upper end of a screw shaft portion 16 of the adjusting rod 14 is connected to a low speed shaft on the output side of the speed reducer 21 via a connecting member (not shown). Then, when the drive motor 20 is driven, the rotational force from the drive motor 20 is transmitted to the screw shaft portion 16 of the adjusting rod 14 while being reduced in speed by the speed reducer 21, and the ball screw portion 18 is rotated as the screw shaft portion 16 rotates. The screw shaft portion 16 is formed by the screwing operation of the internal thread portion along the ball movement.
It is designed to move up and down. At this time, the guide plate 24 is vertically driven along the four guide shafts 23 as the adjusting rod 14 moves up and down, and the drive motor 2
0 and the speed reducer 21 are moved up and down together with the adjusting rod 14.

Further, the screw shaft portion 1 of the adjusting rod 14
As shown in FIG. 6, the lower end portion of 6 is a double thrust ball bearing 2
An end portion of the spline shaft portion 17 is connected via a bearing box 28 in which 7 is incorporated. The double thrust ball bearing 27 in the bearing box 28 absorbs the rotational movement of the screw shaft portion 16 of the adjusting rod 14, and only the moving movement thereof is transmitted to the spline shaft portion 17 side so that the spline shaft portion 17 is splined. The bearing portion 19 is guided to move up and down.

Further, as shown in FIG. 5, the fixed side adjusting unit 13 is provided with a plurality of rod receiving portions 29, which are spaced apart and opposed to the respective adjusting rods 14 and are in contact with the respective adjusting rods 14, and the respective rod receiving parts. A load sensor (pressure detection means) 30 that detects the contact pressure of each adjustment rod 14 that contacts the portion 29 is provided.

Further, the platen surface distance adjusting mechanism 11 when the overload acts on the fixed side adjusting unit 13
A hydraulic cylinder 31 is attached to prevent damage to the.
The hydraulic cylinder 31 has the hydraulic cylinder 3
A hydraulic control circuit (not shown) for keeping the hydraulic pressure in 1 constant is connected.

A mold clamping force control device (control means) 32 is connected to each load sensor 30. A hydraulic control valve 33 that controls the operation of the mold clamping cylinder 6 and a speed servo control device 34 that controls the operation of each drive motor 20 are connected to the mold clamping force control device 32. 33a
Is a simplified hydraulic pressure supply source. Reference numeral 45 is a cavity, 46 is a nozzle, and 47 is a shutoff valve.

As shown in FIG. 1, a communication port 69 is formed in the mold surface 9 of the movable mold 2, and the vacuum pump 6 is provided in the communication port 69 via a flexible tube 68 and a switching valve 61.
Connected to 0.

A skin material 50, which is located in a direction intersecting with the axis of the mold clamping device 1 and between the movable mold 2 and the fixed mold 4 and is capable of moving forward and backward, is stretched between the main drum 65R and the sub drum 65L. The skin material 50 is configured to move from the secondary drum 65L to the main drum 65R side having a drive source.

Further, when the skin material 50 is sandwiched between the movable mold 2 and the fixed mold 4, a position where the phase is shifted by 90 degrees around the movable mold 2 and the fixed mold 4 so that the skin material 50 has tension. A tension controller 54 is provided in the.

Then, the tension controller 54
Is at a position where the movable mold 2 and the fixed mold 4 face each other in the vertical direction, and is configured to be able to go in and out from the surface of each mold 2, 4.

The shutoff valve 47,
Each of the vacuum pump 60, the switching valve 61, the main drum 65R, and the sub drum 65L is electrically connected to a control unit mainly composed of, for example, a microcomputer, and by a control signal from the control unit, Each operation timing is controlled.

A method of forming a laminated molded product using the above-described precision mold opening control device will be described with reference to FIGS. 1 and 8 to 14.

First, when the molding cycle starts, FIG.
The movable type 2 by introducing pressure oil into the piston rod chamber 6d shown in FIG.
Moves the movable platen 3 upward until the movable platen 3 is separated from the fixed die 4. At this time, the skin material 50 stretched between the main drum 65R and the sub drum 65L must be positioned between the movable die 2 and the fixed die 4 (FIG. 8).

Next, the reference point of the platen adjusting mechanism 11 between the movable mold 2 and the fixed mold 4 of the injection molding die is adjusted. During this reference point adjustment, the movable platen 3 is operated by the mold clamping cylinder 6, the movable platen 3 is gradually lowered, and is moved to a position where the side surfaces of the movable die 2 and the fixed die 4 come into contact with each other (for adjusting the reference point). Movable platen moving process).

When the movable mold 2 and the fixed mold 4 are separated from each other under the condition of injection press molding, the skin material 50 is attached to the tension controller 54 and the two molds 2.
The posture of the movable platen 3 is adjusted so as to be parallel to the fixed platen 5 side while being loosely sandwiched between the four. At this time, the adjusting rods 14 of the four movable side adjusting units 12 are operated in advance, and when the movable mold 2 comes into contact with the fixed mold 4, the adjusting rods 14 are evenly arranged on the rod receiving portions 29 of the fixed side adjusting unit 13. The contact is made (Fig. 9).

At this time, the vacuum pump 60 is activated, and the switching valve 61 is operated to move the movable mold 2 inside the cavity 45.
When the residual air between the skin material 50 and the skin material 50 is forcibly degassed from the communication port 69 opened in the mold surface 9 of the movable mold 2, the skin material 50 is removed from the mold surface 9 as the degree of vacuum in the cavity 45 increases. (Fig. 10).

From the above-mentioned state, pressure oil is introduced to the piston head chamber 6c side to perform mold clamping, and each adjusting rod 14 applies a predetermined force to the corresponding rod receiving portion 29. Then, when the mold clamping is completed, the molten resin as the core material supplied from the injection device (not shown) is injected and filled into the cavity 45 through the shut-off valve 47 that is opened (FIG. 11).

At this time, the drive motor 20 rotates and the speed of the adjusting rod 14 is controlled by the speed servo control device 34 according to a preset program. During leveling adjustment, F2 is fed back to the speed servo control unit 34 so that the detected values F2 from the four load sensors 30 arranged at the corners of the movable platen 3 are the same as the initial set values. Also, F0 (P0 x A0)
= P1 xA1 + ΣF2. Where F0 is the mold clamping force,
P0 is the hydraulic pressure, A0 is the cross-sectional area of the piston, P1 is the pressure of the core resin, A1 is the projected area of the cavity, and F2 is the force pressing against the load receiving portion. The detection value F2 detected by the load sensor 30 when the movable platen 3 is lifted up by the thickness of the core material resin and the amount of solidification contraction is
Normally, the ball screw is adjusted to have a maximum load capacity of 1/2 to 3/4.

Here, the mold clamping force control device 32 or the speed servo control device 34 and the singular number of each platen adjusting mechanism 11 are made to correspond to each other, and each singular number is independently controlled to detect the load sensor 30. The signal allows the attitude and the moving state of the movable die 2 or the movable platen 3 to be grasped, and the drive control of each drive motor 20 is corrected if necessary, so that the movable die 2 and the fixed die 4 can be adjusted in the leveling adjustment. It is possible to obtain an optimal posture relationship. It should be noted that not only each singular platen adjusting mechanism 11 can be controlled independently, but also a plurality of sets can be controlled, for example, two each.

Further, the movable die 2 or the movable platen 3
Even when it is necessary to tilt the vehicle in any direction, the drive program set in each drive motor 20 controls the moving speed and the detection signal F2 from each load sensor 30.
Can be handled by controlling the mold clamping force F0.

Further, instead of the output signal of the load sensor 30, the current detector 36 detects the amount of change in the current value or the amount of change in the torque value of the drive system of the drive motor 20 and uses it as a control signal for each control device. It is also possible. In addition,
The output signal of the load sensor 30 and the output signal of a change in the current value of the drive system of the drive motor 20 may be used at the same time,
It is also possible to use them as needed. It is also possible to detect the amount of change in the position of the drive motor 20 with the position detector 35.

When the molten core material resin is completely injected and filled in the cavity 45, the vacuum pump 60 stops driving.

Subsequently, in order to pressurize the filling resin in the cavity 45 to form a desired thickness, the pressure oil introduced to the piston head chamber 6c side is increased to gradually lower the movable die 2 and drive motor 20. The movable die 2 is held at an appropriate horizontal position with respect to the fixed die 4 by rotating and moving the adjusting rod 14 while rotating it. Of course, the series of cycle control is performed based on the mold clamping control circuit as shown in FIG. Then, the main drum 65R and the sub drum 65L
When the skin material 50 stretched between the two is strongly sandwiched between the movable die 2 and the fixed die 4, a part of the strip-shaped skin material 50 is cut by a cutting tool (not shown) ( (Fig. 12).

FIG. 7 shows a schematic structure of the mold clamping control circuit.
An input / output interface 39 for inputting and outputting a detection signal from each detector such as the load sensor 30, the position detector 35, and the current detector 36, and a control signal to be output to each driving unit of the mold clamping cylinder 6 and the drive motor 20. The mold clamping force control device 32 and the speed servo control device 34 are configured by the storage unit 41 that stores the setting conditions and the calculation processing unit 40 that performs the comparison calculation processing of the set value and the detection signal and outputs the control signal.

In the storage unit 41, the mold compression reference point, the rising position of the movable platen 3, the thickness of the core resin, the mold compression amount, the mold compression force, and the movable platen 3 are tilted in any direction. Input values of the tilting direction and amount are stored as set values. In the figure, 35 is the drive motor 20.
Position detectors such as encoders that detect the stroke of
Reference numeral 37 is an input keyboard for inputting setting conditions, and 38 is a display unit.

In the above embodiment, an example of the vertical type mold clamping device is shown, but this is not limited to the vertical type.
It can also be used in a horizontal mold clamping device. In that case, like the movable platen 3 and the movable die 2, the platen surface distance adjusting mechanism 11 is also mounted in a horizontal state so as to operate in the horizontal direction.

In this embodiment, particularly when the core material resin 52 is filled in the cavity 45, if the movable platen 3 is inclined due to a biased pressure, the force F2 generated on each adjusting rod 14 due to the biased pressure is The deviation is calculated by the arithmetic processing unit 40. In this case, the relationship between the compression deflection amount and the load generated from the adjustment rod 14 to the support plate 42 due to the bias pressure is obtained in advance, and this is input to the arithmetic processing unit 40, so that the bias pressure generated is generated. Adjustment rods 14 corresponding to the compression deflection amount corresponding to
The screw shaft 16 is rotated to keep the movable platen 3 horizontal. This control is always performed while the bias pressure is generated, and when the bias pressure is eliminated when the filling of the core material resin 52 is completed, the original feed amount of the ball screw returns to the initial value and the movable platen 3 is in the original horizontal state. It returns to.

In the present embodiment, even if the product shape and the gate arrangement are changed, it is possible to quickly and always form a bonded molded product having a desired thickness.

After that, after waiting for the core material resin 52 to solidify with time, pressure oil is introduced to the piston rod chamber 6d side to lift up the movable platen 3 and then the molded product is taken out from the fixed mold 4. (FIG. 13). Then, the main drum 65R having a drive source is rotated, the skin material 50 is wound and fed, and the new skin material 50 is fed between the upper and lower molds 2 and 4.

Thermoplastic resins that can be used as the core resin 52 shown in this embodiment include various polyethylenes such as high-density polyethylene, polypropylene, various copolymers containing propylene as a main component, ABS resins, and various styrene resins. , Polyamide resin, polyester resin, various polymer alloys, or a mixture thereof. Inorganic fillers, various fillers such as glass fibers, various additives such as pigments, lubricants, antistatic agents, stabilizers and the like can be added to the thermoplastic resin of the present invention, if necessary.

The skin material 50 used in the present invention is appropriately selected depending on the intended product and is not particularly limited. However, when it is intended to be a molded article for automobile interior materials or electric products, it has a decorative property. Those having a soft feeling are preferably used. Examples of the skin material 50 having such characteristics include sheets and films of various resins, woven cloth, and non-woven cloth. A vinyl chloride resin can be preferably used as the resin sheet. Such a vinyl chloride resin sheet is a vinyl chloride polymer, a vinyl chloride copolymer containing vinyl chloride as a main component, or a mixture thereof, if necessary, by adding other thermoplastic resins, stabilizers, plasticizers, and the like. The composition obtained by appropriately adding the agent and the compounding agent is formed into a sheet by a calendar method, a continuous extrusion molding method, or the like. The thickness of the sheet is 0.01 to 2 mm, especially 0.
01 to 1 mm is preferable.

As the fibers constituting the woven fabric used as the skin material 50 in the present invention, not only natural fibers such as cotton, wool, silk and hemp but also synthetic fibers such as polyamide and polyester can be used. it can. The above fibers may be used alone or in a blended state to form a woven fabric by various methods. Examples of woven fabrics include woven fabrics such as plain weave, moquette and tricot, and knitted fabrics.

Furthermore, the non-woven fabric used as the skin material 50 in the present invention can be used without particular distinction whether it is made of natural fibers or synthetic fibers, and its manufacturing method is not limited. Absent.

For example, low density polyethylene, ethylene-
Vinyl acetate copolymer, ethylene-vinyl chloride copolymer,
Various ethylene-based copolymers such as ethylene-vinyl alcohol-vinyl acetate terpolymer, polyolefin-based thermoplastic elastomer (hereinafter referred to as TPE), modified polyolefin, special soft polyolefin, styrene-based thermoplastic elastomer film or sheet , And a resin that is compatible with the thermoplastic resin used is selected.

Further, as a product suitable for the above-mentioned laminating and forming, for example, an interior material for automobile parts (door trim, instrument panel) and the like can be considered.

[0057]

As is apparent from the above description, the present invention is superior to the conventional hydraulic cylinder as follows. By detecting the contact pressure of each adjustment rod that comes into contact with the rod receiving part, it is possible to adjust the leveling of the movable platen with high accuracy, and with high dimensional accuracy, it is a high-quality thin-walled laminated product with uniform wall thickness. Can be obtained. The control response speed is extremely high, and the variation of control accuracy due to the influence of external factors such as bias pressure generated when the core resin is supplied is eliminated, so the high-precision laminating molding that does not impair the soft feel and appearance of the molded product. Therefore, it is possible to stably obtain high-quality thin-walled molding.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of an apparatus for carrying out the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a front view showing a movable side adjustment unit.

FIG. 4 is a vertical cross-sectional view showing a connecting portion between a drive motor and a ball screw type feeding mechanism.

FIG. 5 is a front view showing a fixed adjustment unit.

FIG. 6 is a vertical sectional view showing a connecting portion of a spline shaft.

FIG. 7 is a circuit configuration diagram showing an embodiment of mold clamping control.

FIG. 8 is an explanatory diagram showing a molding procedure for a bonded molded product.

9 is an explanatory diagram showing a continuation of the operation shown in FIG.

FIG. 10 is an explanatory diagram showing a continuation of the operation shown in FIG.

11 is an explanatory diagram showing a continuation of the operation shown in FIG.

12 is an explanatory diagram showing a continuation of the operation shown in FIG.

13 is an explanatory diagram showing a continuation of the operation shown in FIG.

FIG. 14 is a flowchart of a method for molding a bonded molded product.

[Explanation of symbols]

 1 mold clamping device 2 movable mold 3 movable platen 4 fixed mold 5 fixed platen 6 mold clamping cylinder 9 mold surface 11 platen surface distance adjustment mechanism 12 movable side adjustment unit 13 fixed side adjustment unit 14 adjustment rod 15 ball screw type feed mechanism Part 18 ball screw part 19 spline bearing part 20 drive motor 29 rod receiving part 30 load sensor 31 hydraulic cylinder 32 mold clamping force control device 33 hydraulic control valve 33a hydraulic supply source 34 speed servo control device 35 position detector 37 input keyboard 39 input Output interface 40 Arithmetic processing unit 41 Storage unit 45 Cavity 46 Nozzle 47 Shut-off valve 50 Skin material 52 Core resin 54 Tension controller 60 Vacuum pump 61 Switching valve 65-R Main drum 65-L Slave drum 68 Flexible Cube 69 communication port

Claims (5)

[Claims] 1. A movable mold for molding is held by a movable platen and a fixed mold is held by a fixed platen, respectively, and a mechanism for advancing and retracting the movable platen with respect to the fixed platen is provided, and a mold clamping force is generated in the movable platen. In addition to the mold clamping mechanism, a mechanical feed mechanism movably mounted on either the movable platen or the fixed platen along the forward / backward movement direction of the movable platen, an adjusting rod, and a prime mover for driving the adjusting rod were provided. A plurality of platen surface distances composed of a rod adjusting section, an adjusting rod receiving section having a rod receiving section arranged on the other side of the rod adjusting section and a detecting section for detecting a force applied to the rod receiving section A speed servo controller that controls the amount of movement of the movable platen in the drive system of the platen surface distance adjustment mechanism, and a force sensor. Using a precision mold opening control device equipped with a mold clamping force control device that controls the mold clamping force of the mold clamping mechanism based on the output signal output from the mold, the molten thermoplastic resin to be the skin material and the core material is molded into a metal mold. It is supplied into the mold, the molten resin is imprinted in the mold, and at the same time, the surface material is pasted, and then the molten resin is cooled and solidified, and the core resin and the surface material made of thermoplastic resin are used. A method for forming a laminated molded article, which is characterized in that the following molded article is obtained. 2. A mold clamping mechanism is provided so as to correspond to each of the plurality of platen surface distance adjusting mechanisms, and the mold compressing process control is independently or plurally performed by each of the platen surface distance adjusting mechanisms. The method for molding a laminated molded article according to claim 1, wherein the molding is carried out as a set. 3. A mold compression reference point, a mold compression amount, a mold compression force, a rising position of a movable platen, and a wall thickness of a core material resin are stored as set values in a storage unit, and a control value based on the set values is stored. Controls each drive unit of the platen inter-face distance adjustment mechanism as an output signal, and drives the mold clamping mechanism as an output signal of the control value, which is the result of comparison calculation of the detection signal from the force sensor and the set value by the arithmetic processing unit. The method for forming a laminated molded article according to claim 1, wherein the part is controlled. 4. When correcting a tilted movable platen in a horizontal direction, a speed servo control device for controlling a moving amount of the movable platen to a drive system of a platen surface distance adjusting mechanism and a force sensor output to the correcting direction. An apparatus for molding a laminated molded article, comprising: a mold clamping force control device that controls a mold clamping force of a mold clamping mechanism that performs leveling adjustment of a movable platen based on an output signal that is output. 5. A storage unit for storing input values such as a mold compression reference point, a mold compression amount, a mold compression force, a movable platen rising position, and a wall thickness of a core material resin as set values, and a force sensor or a drive motor. The processing unit for outputting the control signal of each of the platen surface distance adjusting mechanism and the mold clamping mechanism as a control signal of the control value or the correction value by comparing and processing the detection signal of And an input / output interface section for inputting / outputting control signals,
A speed servo control device having an input keyboard and a display part and a mold clamping force control device were provided, and the force sensor part and each drive part of the plurality of platen surface distance adjusting mechanisms and the drive part of the mold clamping mechanism were interconnected. The device for molding a laminated molded product according to claim 4, characterized in that.