JPS6022626B2 - Simultaneous adhesive molding method for laminated molded products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method for simultaneous adhesion and molding of laminated molded products, particularly for laminated molding of trims made of non-metallic materials (mainly resin), which are typified by automobile interior parts. The present invention provides an effective molding method that can reduce product defects such as wrinkles and tears.

(Prior art) Traditionally, trims, which are automobile interior parts, are
It is known as a laminate molded product in which a part's rigidity maintaining member (base material) and a cushion layer that provides feel or a skin material that provides surface quality (skin material) are laminated and molded using an adhesive or the like. However, the methods that have been mainly used to manufacture this laminated molded product are: (11) A method in which the skin material is bonded after the base material is molded, and (2) A method in which the skin material is bonded to the base material in advance or temporarily laminated. It is one of the methods to perform molding after attaching.

(Problems to be solved by the invention) However, all of these subordinate methods involve many steps, are complex processes, and require large amounts of equipment investment, space, labor, etc., making them a cost quotient. .

In addition, the latter '21 method has an additional problem that problems such as wrinkles and tears are likely to occur in the skin material of the product obtained by performing molding on the skin material. are doing. This is because the skin material may or may not be stretched extremely depending on the shape of the molded product. The present invention has been made in view of the above circumstances, and its main purpose is to shorten the manufacturing process by simultaneously bonding and molding the above-mentioned laminate molded product in one process. The objective is to improve product quality by suppressing the occurrence of wrinkles, tears, etc., as well as reducing costs.

(Means for Solving the Problems) The present invention has been made to achieve such an object, and its gist is to provide a frame body positioned in multiple stages in the vertical direction, Using a movable odor control device equipped with spacer means for keeping each of the frames at a predetermined gap,
A plurality of laminated materials such as sheet-like skin materials and base materials are each set in each frame of this jig, while a pick-up tool in which these laminated materials are set is placed between the upper mold and the lower mold. Then, by moving the upper mold and/or lower mold and performing a press molding operation, the laminated material such as the skin material and base material is placed under tension caused by pressing against the holding by the transfer jig. is pressed between the upper mold and the lower mold, thereby simultaneously molding each of the laminated materials into a predetermined shape and bonding the laminated materials together.

(Operations and Effects) According to the present invention, a laminate molded product can be molded and bonded in one step, thereby making it possible to manufacture a desired product all at once.

In other words, if the upper mold and lower mold are closed together, the jig will
Each of the sheet-like laminated materials held between the molds is pressed between the upper mold and the lower mold, and each of them is molded at once into a shape corresponding to the molding surfaces of the upper mold and the lower mold, and is adhered to each other. This is what happens.

As a result, the time for molding and processing the laminated molded product is shortened, and the cost of the product is also reduced.

Moreover, during molding, the sheet-like laminated materials such as the skin materials are held in a tensioned state by being held by a jig, so even if each laminated material is molded at the same time, the skin materials etc. may tear or There is no occurrence of this, and the quality of the product is maintained at a good level. Furthermore, the jig used in the present invention is a simple one in which a plurality of frames are stacked on top of each other using a spacer means, and by simply increasing the number of stages of the frames,
More sheet-like laminate materials can be held in multiple layers.

For this reason, it is possible to easily cope with an increase in the number of layers in a laminated molded product, and this does not require the press equipment to become larger or the cost of counterfeiting or odor control to be particularly high. do not have. In addition, the present invention has the advantage that, since a movable jig is used, the work of setting the laminated material onto the pick-up jig can be done by pressing and rolling.

In other words, prepare two or more sets of pick-up tools, and while you are press-forming the sheet-like laminate material held in one pick-up tool, you can press-form the sheet-like laminate material in another pick-up tool. When pressing is completed and the upper and lower molds are opened, pressing tools that hold the laminated molded product or laminated material can be replaced to continue the pressing operation. It can be done. by this,
Processing cycle time is shortened and processing efficiency is increased, thereby further reducing product costs. (Example) Hereinafter, the present invention will be explained in more detail based on the drawings.

First, FIGS. 1a, b, and c each schematically show a molded ceiling for an automobile according to an embodiment of the present invention, and such a product can be better understood from the enlarged cross-sectional view of FIG. 1c. As such, it has a laminated structure in which a base material 1 that is relatively rigid enough to hold the shape of the molded product and a flexible skin material 2 are bonded together with an adhesive 3 or the like.

Note that materials used as the base material 1 include, for example, paper cardboard, plastic cardboard, foamed plastic, etc.
For the skin material 2, a laminated product consisting of a surface material such as polyvinyl chloride, polyethylene, knit fabric, or non-woven fabric and a cushion layer for the purpose of improving the feel such as urethane foam or PE foam is generally used in the manufacture of trims. It will be. In manufacturing such a laminated molded product, a jig as shown in FIGS. 2a and 2b, for example, is used.

That is, the pick-up tool 6 is made by arranging rectangular frames 6a and 6b in two stages, upper and lower, and connecting them with legs 7 at the four corners with a predetermined gap between them. A suitable number of needles or clips 8 are provided on the step part along its entire circumference, and the base material 1 and the skin material 2, which are sheet-like laminated materials, are respectively secured to the needles or clips 8 on their four sides. It is set by being forced to do so.
A rectangular sheet-shaped skin material 2 and a base material I each having a substantially flat surface that has not yet been formed into a final product shape are set in the respective frames 6a and 6b of such a jig 6. The skin material 2 and the base material 1 are connected by legs 7 of
After maintaining a predetermined gap between them, the common odor 6 is removed from a male and female mold (made of metal, resin, rubber, etc.) consisting of an upper mold 4 and a lower mold 5, as shown in FIG. 3a. It is placed between the forming molds).

Next, as shown in FIG. 3b, the upper mold 4 descends, and the convex shape of the mold first contacts the skin material 2, and as the upper mold 4 further descends, the skin material 2 is exposed to the transfer jig 6, An appropriate tension T is applied against the holding by the upper mold 6a, and finally the upper mold 4 descends, the core skin material 2 comes into contact with the base material 1, and the upper and lower molds 4, 5 The base material 1 is formed into a predetermined shape with an appropriate clearance as usual (see FIG. 3c). At this time, since the adhesive 3 is previously applied to the surface of the base material 1 to be mated with the skin material 2, the base material 1 and the skin material 2 are bonded together at the same time as the above-mentioned molding. As described above, according to the present invention, the base material 1 and the skin material 2 are press-molded while being held in a predetermined pick-up tool, so that molding and adhesion can be performed at once, which is different from conventional methods. Molding and adhesion, which previously required multiple steps, were reduced to a single step, making it possible to shorten the process and significantly reduce costs.

Incidentally, if the capital investment amount, space, number of workers, power, etc. in the conventional method are respectively 100 (index), the values of the present invention are 60, 40, 40,
This results in a marked decrease in the degree of phlegm. In addition, the skin material 2, which is prone to wrinkles, is pressed and molded onto the base material 1 while being subjected to appropriate tension by the contact and pressure of the upper mold 4 as a convex mold, so that wrinkles and tears are avoided. The occurrence can be effectively suppressed and the quality of the product can be significantly improved, for example, the conventional defect rate of 10% is reduced to 2% or less by the present invention. In addition, the lining tool 6 (
Specifically, the base material 1 held by the frames 6a, 6b)
The gap formed between the material 1 and the skin material 2 is adjusted by the length of the leg 7, and determined as appropriate so that appropriate tension is applied to each material 1 and 2 and the material is formed. It will be done. Note that during the molding according to the present invention, suitably heating the materials 1 and 2 to soften them has a positive effect on the molding operation, and is therefore preferably employed in the present invention. The heating of such material is usually carried out by the upper mold 4,
Prior to the press operation using the lower mold 5, the material set in the jig 6 is heated to a necessary degree in advance, or a heating mechanism is built into the upper and lower molds 4 and 5 to heat the material. This is done by heating and molding (hot pressing). In the above example, the upper die 4 of the molding press is movable, but the present invention is not limited to this in any way, and the lower die 5 may be made movable instead of the upper die 4. Furthermore, both the upper mold 4 and the lower mold 5 can be made movable.

Also, a jig 6 placed between the upper mold 4 and the lower mold 5
is preferably moved upward or downward as necessary depending on its arrangement position, so that it is located on the parting surface. In addition, the press molding machine may be one that also uses vacuuming. Further, in the above example, the skin material 2 contacts the upper mold 4 as a convex mold, and is pressed against the base material 1 under tension caused by being pressed against the holding by the jigs 6 and 6a. However, if the base material 1 can be stretched, the positions of the base material 1 and the skin material 2 are reversed, and the base material 1 is placed on the odor pickup 6 side on the upper mold 4 side as a convex mold. There is no problem even if it is held as such.

In addition, the jig 6 used is not limited to the one illustrated in FIG. 2, and may be used to laminate sheet-like materials such as base materials, skin materials, etc., by having a frame body and a spacing means such as legs to keep the frame body at a constant interval. If the materials can be set with a predetermined gap,
Any jig 6 can be used, and furthermore, such a jig 6
The structure is not limited to the two illustrated materials, but three or more materials may be set, and in that case, the foundation will be formed in multiple stages of three or more stages. In addition, the present invention can be implemented with various modifications based on the knowledge of those skilled in the art without departing from the spirit thereof.

[Brief explanation of the drawing]

Figures 1a, b, and c each schematically show a molded ceiling for an automobile according to an example of an embodiment of the present invention, in which a is a plan view thereof, and b is a plan view thereof.
is A1-AI sectional view in a, c is A2- in b
It is an enlarged view of A2 cross section. FIG. 2a is a plan view showing an example of the lining used in the present invention, and FIG. 2b is an enlarged cross-sectional view taken along line B-B in a.
FIGS. 3a to 3c are explanatory cross-sectional views of molds each showing one step of the method of the present invention. 1...Base material, 2...
・Skin material, 3...Adhesive, 4...Upper mold, 5
...Lower die, 6...Jig "6a, 6b...
... Frame body, 7... Legs (slab means), 8...
...Needles or clips, etc. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. Using a movable jig equipped with frames arranged in multiple stages in the vertical direction and spacer means for maintaining each frame at a predetermined gap, each frame of this jig is equipped with a sheet-like sheet. While setting each of a plurality of laminated materials such as a skin material and a base material, a jig in which the laminated materials are set is placed between an upper mold and a lower mold, and then the upper mold and/or the lower mold are set. By moving and performing press molding work, the laminated materials such as the skin material and the base material are placed on the upper mold and the lower mold under tension caused by pressing against the holding by the jig. 1. A method for simultaneously adhering and molding a laminate molded product, characterized in that each of the laminate materials is simultaneously molded into a predetermined shape by pressing, and the laminate materials are bonded together.