JP3458686B2 - Apparatus and method for winding terminal part of skin material of multilayer molded product - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device and a winding device for winding a terminal portion of a skin material protruding from a peripheral portion of a base material of a multi-layer molded article in which a skin material is laminated on a base material made of a thermoplastic resin onto a back surface of the base material. It is about the method.

[0002]

2. Description of the Related Art A multi-layered product with a good appearance by winding a multi-layered product in which a skin material is laminated on a base material made of a thermoplastic resin, and winding the end portion of the skin material protruding from the outer periphery of the base material on the back surface of the base material. As a method for producing a product, a method using an adhesive and a method using a tucker are generally used. In the method using an adhesive, the adhesive is applied to one or both of the back surface of the skin material terminal portion and the back surface of the base material protruding from the outer peripheral portion of the base material, and the skin material end portion is bent to the back surface side of the base material to bond the back surfaces to each other. Generally, the method of bonding is used, and in the method of using a tucker, the skin material end portion protruding from the outer periphery of the base material is bent to the back surface side of the base material, the back surfaces are aligned and the tacker is driven with an air gun etc. Was fixed to the base material.

However, in these methods, for example, in the method using an adhesive, it takes a long time to bond the end portion of the skin material and the base material, which leads to cycle up.
There were problems such as the effects on the human body and the environment due to the use of solvents.
Also, the method using a tucker takes time, the corners are not finished well, the pins stick out on the product surface due to variations in the tucker's driving depth, and the end of the skin material peels off from the backside of the base material due to insufficient fixing force. There was a problem such as.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The present inventors have solved the above problems, and without causing environmental problems due to the use of solvents and the like, the skin material terminal portion can be wound on the back surface side of the base material in a short time and with a simple operation. By firmly joining the end part to the back surface of the base material,
The present invention has been completed as a result of a study on a method of winding a terminal portion of a skin material capable of obtaining a multilayer molded article having a good appearance and an apparatus therefor.

[0005]

That is, according to the present invention, a skin material end portion protruding from a peripheral portion of a base material of a multilayer molded article in which a skin material is laminated on a base material made of a thermoplastic resin is wound around a back surface of the base material. Incorporating device, means for heating and melting the back surface of the protruding skin material terminal portion, means for winding the skin material terminal portion whose back surface is heat-melted to the back surface side of the base material, and the wound skin material terminal portion The present invention provides a skin material terminal winding device for a multilayer molded article, characterized in that it has means for crimping the back surface to the back surface of the base material, and the present invention provides a base material terminal part made of a thermoplastic resin. In a multi-layer molded article formed by laminating a skin material protruding from the outer peripheral portion of the material, (1) a step of heating and melting the back surface of the skin material terminal portion protruding from the base material outer peripheral portion, and (2) a heat-melted surface material terminal portion. The step of winding the back side of the base material,
(3) A method for winding a skin material terminal on a multi-layer molded article, which comprises a step of press-bonding the back surface of the wound skin material end portion to a back surface of a base material and performing melt bonding.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail with reference to the drawings. Needless to say, this description is an example of the present invention, and the present invention is not limited to this. FIG. 1 is an example of a multi-layer molded product that is a target of terminal winding, and shows a multi-layer molded product in which a skin material is laminated on a substrate made of a thermoplastic resin from the surface material side. Skin material protruding from the outer peripheral part (skin material end part)
Is trimmed in a state where it extends beyond the amount of winding.
FIG. 2 shows a state after winding the end portion of the skin material of the multilayer molded product of FIG. 1 on the back surface of the base material, similarly from the skin material side.

The terminal winding device (5) of the present invention comprises means for heating and melting the back surface of the skin material (3) protruding from the outer peripheral portion of the base material (2), and a base material terminal portion for which the back surface is heat-melted. The apparatus has means for winding the back surface side of the material, and means for pressure-bonding the back surface of the wound skin material end portion to the back surface of the base material. The surface material side of the outer peripheral portion to be subjected to the terminal treatment of the multi-layer molded article to which the skin material is stuck, which protrudes from the outer peripheral portion of the resin base material, is set on the molded article fixing base (4) designed so as to follow this, Used together. FIG. 3 is a multilayer molded product (1) to be processed, which has a skin material protruding to the outer periphery of the base material.
FIG. 9 is a partial cross-sectional view showing a state in which the terminal winding device (5) is integrally set on the molded product fixing base (4) on which is set.

When the multi-layer molded product (1) to be subjected to the terminal treatment is deformed or the like, the molded product to be treated cannot be completely adhered to the molded product fixing base (4). It is preferable to press the molded product against the fixing base with a pressing jig (not shown) that also serves as a straightener, and to bring the molded product to be subjected to end treatment into close contact with the fixing base so that the surface material side of the outer peripheral portion is aligned. Further, when the skin material protruding from the outer peripheral portion of the base material is tilted inward, for example, as shown in FIG. 8, the skin material is pressed against the terminal winding device (5) by using air or the like. It is preferable.

A method of winding the skin material protruding from the outer peripheral portion of the base material using the terminal winding device (5) shown in FIG. 3 will be described. FIG. 3 shows, as described above, a molded product fixing base (4) on which a multilayer molded product (1) to be processed having a skin material (3) that is bare on the outer peripheral portion of the base material (2) is set. It shows a state in which the terminal winding device (5) is integrally set. FIG. 4 shows an air-cylinder (8) in which a heating tip (6) having a built-in heater and controlled to a predetermined temperature is provided on an air-cylinder bracket (13).
Shows a state in which the heating tip (6) is pressed downward or brought close to the back surface of the skin material to be melted by rotating downward from the state shown in FIG. 3 via the heating tip arm (7). ing. At this time, in order to surely melt the back surface of the skin material in a short time, the tip of the crimping tip (9) rotatably provided by the guide pin (18) at the tip of the slide guide (15) is used as the skin material. It is preferable to press from the front surface side and sandwich the skin material between the heating tip (6) and the crimping tip (9). To press the crimping tip (9) against the surface of the skin material, for example, as shown in FIG. 9, the crimping tip (9) is connected to the crimping tip rod (10) connected to the slide guide (15) via the connecting pin (17). By removing the air from the air cylinder (12) to bring the slide guide into a neutral state and advancing the slide guide (15) using a spring (21) or the like provided at the rear end of the slide guide. The tip of the crimping tip (9) can be pressed against the tip of the skin material end.

When the back surface of the skin material is melted, it is not necessary that the melted portion is only the back surface in a strict sense.
Depending on the type of skin material, the surface of the skin material that protrudes may partly be in a molten state, and in the multilayer molded product after the winding treatment, the appearance is not impaired at the corner portion after the winding. It may be melted into. After melting the back surface of the skin material end portion (3), the heating tip (6) is air-cylinder-
By (8), it pivots upward through the heating tip arm (7) and returns to the initial position as shown in FIG.

After the heating tip (6) has returned to its initial state,
When the air cylinder (12) is operated to move the crimping tip rod (10) forward, the connecting pin (17) is attached to the rod.
The slide block (15) connected via the end of the outer periphery of the base material provided at the tip of the slide block (15) to the forward stroke limit of the crimping tip (9). Advance. In this forward movement process, the crimping tip (9) passes over the upper end of the base material while bending the skin material, and the skin material is folded inward from the upper end of the base material. (Fig. 5) The forward stroke limit at this time is
The adjustment screw (19) is used to adjust the thickness and type of the base material and the skin material in advance.

When the rod (10) further advances after the crimping tip (9) reaches the forward stroke limit, the guide pin (18) advances along the groove provided in the guide (11), and the crimping is performed. The tip (9) is turned downward near the connecting pin (17) with the rod (10) to fold the skin material to the back surface side of the base material and crimp and wind it. (Fig. 6)
At this time, the air-cylinder (12) is attached to the support pin (1
6) and the connecting pin (17) of the rod (10), the air-cylinder (12) even when the crimping tip (9) moves diagonally upward along the groove of the guide (11). ) Is rotated by the support pin (16), the rod (10) can be lifted.

When the winding is completed, the rod (10) and the slide guide (15) are retracted to return the crimping tip (9) to the initial position, and the terminal winding operation is completed. (Figure 7)

Here, the set temperature of the heating tip (6), the pressing time to the back surface of the skin material and the crimping time with the crimping tip (9) vary depending on the material and thickness of the skin material to be used, but the entire winding cycle is It is preferable to raise the set temperature in order to surely wind the skin material on the back surface of the substrate as short as possible. For example, in the case of a skin material lined with polypropylene foam having a foaming ratio of 15 times and a thickness of 3 mm, the set temperature of the heating tip (6) is 220 ° C. or higher, particularly 240.
It is preferably at least ° C. In addition, when using a thin sheet alone such as a polypropylene-based elastomer sheet, care must be taken because the skin material will be broken if the heating temperature is too high. Further, if the time until the back surface of the skin material is melted by the heating tip (6) and pressed by the pressure bonding tip (9) becomes long, the melted portion may be solidified and the skin material may not be welded even if pressed onto the base material. Therefore, it is necessary to make the time as short as possible.

The material of the crimping tip (9) needs to be selected according to the kind of the skin material. For example, a material having a high hardness such as metal can be used as long as it is an elastic skin material such as polypropylene foam. In the case of a thin skin material such as a single polypropylene elastomer sheet without a material, it is preferable to use an elastic material for the pressing portion of the crimping tip so that the skin material and the base material are completely adhered. Also,
In order to press and bond the skin material to the back surface of the base material with the crimping tip (9), it may not be possible to complete the welding without pressing with the crimping tip (9) and simultaneously cooling. Therefore, a material having good thermal conductivity is more preferable.

The operation example of the terminal winding device has been described above. However, such a terminal winding device can be used in accordance with the size of the multilayer molded article to be processed and the bonding state of the skin material.
For example, the size of the heating tip or the pressure-bonding tip may be changed, a plurality of these may be used, or terminal winding devices having different sizes may be used in combination depending on the situation. For example, when the skin material is wound around the entire outer peripheral portion of the multilayer molded product, it is arranged by using a plurality of terminal winding devices so as to surround the entire periphery (FIG. 10), or the multilayer to be processed. When the outer peripheral portion of the molded product includes a linear portion, the number of terminal winding devices to be arranged can be reduced by enlarging the heating tip and the crimping tip on the linear portion (FIG. 11).

In addition, a multi-layer molded product having a good appearance is obtained by finely arranging a terminal winding device having a small shape of a heating tip or a crimping tip in the corner portion or the complicated shape portion and performing terminal treatment. be able to. In addition, it is preferable to shift the timing of the winding operation of the corner portion or the like so that the terminal winding devices do not interfere with each other. In the case of using such a large number of terminal winding devices, a series of sequence corners may be used for control, and the timing and time of each operation may be arbitrarily set by a timer.

In a multilayer molded article to which terminal treatment can be applied with such a terminal winding device, the base resin constituting the molded article is a resin usually used in compression molding, injection molding, extrusion molding, for example, polypropylene, polyethylene,
Acrylonitrile-styrene-butadiene block copolymer, polystyrene, polyamide such as nylon, polyvinyl chloride, polycarbonate, acrylic resin, general thermoplastic resin such as styrene-butadiene block copolymer, thermoplastic elastomer such as EPM and EPDM , Mixtures of these, and polymer alloys using them, and these may be non-foaming or foaming. Further, these thermoplastic resins may contain a filler such as glass fiber ordinarily used, if necessary, various inorganic or organic fillers,
Of course, various additives such as various pigments, lubricants, antistatic agents and stabilizers that are usually used may be blended.

Further, as the skin material, a sheet or film of a thermoplastic resin or a thermoplastic elastomer that can be welded to a thermoplastic resin used as a base material, or a foamed sheet of a thermoplastic resin or a thermoplastic elastomer is conventionally known. Various kinds of skin materials are applied, and the surface of these skin materials may be decorated with a textured pattern such as grain or printed or dyed depending on the purpose. Further, each of these skin materials may be a single skin material or a composite skin material in which two or more kinds are laminated with an adhesive or the like, and in particular, a polyvinyl chloride sheet using a foamed sheet such as a polypropylene foamed sheet as a backing material. Thermoplastic elastomer sheets such as EPDM and EPDM are suitable.

[0020]

Industrial Applicability The terminal winding device of the present invention melts the back surface of the skin material protruding from the base material of the multi-layer molded article in which the skin material is laminated on the surface of the base material of the thermoplastic resin with the heating chip, and the skin material Is wound on the back surface of the base material, pressure-bonded thereto, and firmly bonded to the base material by fusion bonding, so that it is possible to obtain a multilayer molded article having excellent winding strength and good appearance.

[0021]

EXAMPLES Next, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples.

Example 1 Using a molded product having a skin material protruding on the outer peripheral portion of the base material having the shape shown in FIG. 1, the terminal winding device shown in FIG. 3 was arranged and used as shown in FIG. ~ Terminal winding was carried out by the method described in the text shown in Fig. 7 to obtain a multilayer molded article (vehicle door panel) shown in Fig. 2. Polypropylene (Sumitomo Noblen BT
A51E-1: manufactured by Sumitomo Chemical Co., Ltd., and the skin material is a foamed polypropylene sheet with a thickness of 3 mm and a foaming ratio of 15 times on the back side of a vinyl chloride sheet with a thickness of 0.6 mm (Toray, PPS).
It is a laminated sheet obtained by laminating M15030). At this time, the set temperature of the heater of the heating chip is 260 ° C,
Contact time between heating tip and backside of skin material (heating and melting time)
Was 10 seconds, and the pressing time with the pressure-bonding tip was 10 seconds. The outer surface of the obtained multi-layer molded product did not protrude, and it was neatly folded inside the base material, and the back surface of the skin material and the base material were firmly fused together. Was also good.

Example 2 Terminal winding was carried out in the same manner as in Example 1 except that a multi-layer molded article having a shape shown in FIG. 1 in which the skin material was a polypropylene-based elastomer sheet having a thickness of 0.5 mm was used. A multilayer molded article (door panel for automobile) shown in was obtained. However,
At this time, the set temperature of the heater of the heating tip is 190
C., the heating and melting time was 10 seconds, and the pressing time with the pressure-bonding tip was 10 seconds. The outer surface of the obtained multi-layer molded product did not protrude, and it was neatly folded inside the base material, and the back surface of the skin material and the base material were firmly fused together. Was also good.

[Brief description of drawings]

FIG. 1 is an example of a molded product having a skin material terminal portion protruding from the outer peripheral portion of a base material.

FIG. 2 is an example of a multilayer molded product obtained by subjecting the molded product shown in FIG. 1 to a terminal treatment.

FIG. 3 is a partial sectional schematic view showing an example of the terminal winding device of the present invention.

FIG. 4 is a schematic diagram showing a terminal winding process using the terminal winding device shown in FIG.

5 is a schematic view showing a terminal winding process using the terminal winding device shown in FIG. 3. FIG.

FIG. 6 is a schematic view showing a terminal winding process using the terminal winding device shown in FIG.

FIG. 7 is a schematic view showing a terminal winding process using the terminal winding device shown in FIG.

FIG. 8 is a view in which an air-blowing nozzle is added to the terminal winding device shown in FIG.

FIG. 9 is a schematic cross-sectional view of a portion including a spring for pressing the crimping tip against the skin material in the example of the terminal winding device of the present invention.

FIG. 10 shows an example in which a plurality of terminal winding devices are arranged on the outer peripheral portion of a molded product to be processed.

FIG. 11 shows an example in which a plurality of terminal winding devices are arranged on the outer peripheral portion of a molded product to be processed.

[Explanation of symbols]

1: Multi-layer molded product 2: Base material 3: Skin material 4: Molded product fixing base 5: Terminal winding device 6: Heating tip 7: Arm for heating tip 8: Air cylinder for heating tip 9: Crimp tip 10: Rod for crimping tip 11: Crimping tip guide 12: Air cylinder for crimping tip 13: Air cylinder bracket 14: Air cylinder bracket 15: Slide guide 16: Cylinder-support pin 17: Crimp tip connecting pin 18: Guide pin 19: Stroke adjusting screw 20: Air-blowing nozzle 21: Spring

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-61-193831 (JP, A) JP-A-62-121127 (JP, A) JP-A-6-127443 (JP, A) JP-A-1- 218820 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B29C 65/18 B29C 43/32 B29C 51/26 B29C 33/12-33/18

Claims (2)

(57) [Claims] 1. A device for winding a terminal portion of a skin material protruding from an outer peripheral portion of a base material of a multi-layer molded article in which a skin material is laminated on a surface of a base material made of a thermoplastic resin, onto the back surface of the base material. Has heat
Sheets and fills of plastic resins and thermoplastic elastomers
Heating with a built-in heater
A means for heating and melting the back surface of the skin material terminal portion protruding from the chip, a means for winding the skin material terminal portion whose back surface is heated and melted by the pressure bonding tip to the back surface side of the base material, and a pressure bonding chip.
A device for winding a skin material end portion of a multi-layer molded article, comprising means for press-bonding the back surface of the wound skin material end portion to the back surface of the base material. 2. The skin material is thermoplastic resin or thermoplastic elastomer.
A sheet, film, or foam sheet of a mar, which is a multi-layer molded product with a laminated skin material, in which the end portion of the skin material protrudes from the outer periphery of the base material made of a thermoplastic resin. (1) A heating chip with a built-in heater a step of heating and melting the backside of the skin material end portion protruding from the substrate peripheral portion by, (2) a step involving the back surface side of the heated and melted skin material end portion of the substrate by bonding the chip, by (3) crimp chip A method for winding a skin material end portion of a multilayer molded article, which comprises a step of press-bonding a back surface of the wound skin material end portion to a back surface of a substrate and performing melt bonding.