JPH03244524A - Terminal treatment of surface layer member - Google Patents

Abstract

PURPOSE:To produce a product which has a good and beautiful terminal shape and is high in value as a surface layer member by forming an upper blade and a lower blade to the tip part of a sliding mold while providing the interval and pushing the terminal of the surface layer member by actuation of the sliding mold and thereafter cutting a core material with the upper blade and also cutting the surface layer with the lower blade while leaving an excess part. CONSTITUTION:An actuator is actuated at the same time as finish of lowering of a top force 31. A sliding mold 36 is pushed into a bottom force 32 side and the tip part of a door trim is stuck and molded. At this time, an upper blade 38 is not allowed to abut against a bottom force 32 and a slight gap is held. Further only a core material 29 is cut by the material having a curved face to the tip part and the surface layer material 28 is not cut. On the other hand, a lower blade 40 is allowed to strongly abut against the step part 35 of the bottom force 32 and the tip part is worked into a sharp swordlike edge. Therefore the material 30 to be worked is completely cut. As a result, the upper R part 22 and the main body part are formed in the door trim 21. The extra part 41 of only a surface layer material 28 is formed to the terminal part 24 furthermore being the tip of the tip part of the upper R part 22.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to surface members found in interior parts such as automobile doors and instrument panels, household furniture, etc., that is, skin materials made of soft materials or skin layers and hard Overlap the core member consisting of the members,
The present invention relates to a method for treating the ends of a facing member that is integrally attached.

(Prior Art) Many interior parts such as automobile doors and instrument panels, and surface members such as sofas, desks, and walls in the home are made of composite layers and are adhered by heating and pressurizing.

That is, a sheet made of PVC or the like is used as the outer layer and a cushion material such as a urethane pad or polypropylene foam is laminated on the back side to form a soft outer layer member, and a hard resin layer is added to the soft member. A stack of core members made up of members is heated, placed on a mold, and pressed with a press to form a pressure bond and a pattern on the skin surface, etc.

Regarding the manufacturing method of such a facing member, Japanese Patent Application Laid-open No. 1983-
This method has been proposed in Publication No. 199628 and the like.

That is, the above-mentioned Japanese Patent Application Laid-Open No. 63-199628 discloses that, for automobile door trims having curved ends, a slide mold is used which presses from the lateral direction in addition to the upper and lower molds. A device is shown in which a door trim, etc., is cut using a cutter.

FIG. 5 shows an enlarged cross-sectional view of the vicinity of the end of such a slide-type press molding device. A slide mold 3 to be pressed is provided.

An undercut portion 4 for forming the tip of the door trim is provided at the top of the tip of the slide mold 3, and a meshing portion 5 of the tip comes into contact with the lower surface of the lower mold 2, so that the slide mold 3 It is configured to cut off unnecessary parts of the workpiece 6 when pressed against the lower mold 2 side.

<Problem to be solved by the invention> However, when the slide mold 3 shown in FIG.
For example, when forming the tip of the door trim 6, since the meshing portion 5 at the tip of the slide mold 3 has an acute cutting edge, the skin material 7 of the workpiece 6 (door trim) and the cushion material 8 The surface layer member 9 is cut into the laminated skin layer member 9, and the skin layer member 9 is stretched and cut when sliding.

As a result, the terminal portion 11 of the finished product is as shown in FIG.

Since the skin material 7 shrinks and returns to its original size, the dimensions are insufficient and the cut surface becomes jagged and irregular. On the other hand, the cushion material 8 was also crumbled and exposed.
In some cases, the quality of the appearance deteriorated and the product became defective. This poses a problem not only in terms of cost but also in terms of process, and an early solution has been an issue.

The present invention solves the above problems and provides a good and beautiful terminal shape.
The object of the present invention is to provide a terminal treatment method for manufacturing a product having high value as a skin member.

Means for Solving the Problems> In order to achieve the above object, the present invention superimposes a soft skin layer member on a hard core material, and pressurizes the surface material to integrally adhere and mold the material. In a method of molding an end of a facing member using a slide mold disposed on the sides of an upper mold and a lower mold, an upper blade and a lower blade are formed at a distance from each other at the tip of the slide mold.

After pressing the end of the facing member by the slide type operation,
The core material is cut by the upper blade, and the skin layer member protruding from the slide mold is cut by the lower blade, leaving an extra length.

Functions> The present invention is constructed as described above, and functions as follows.

First, a resin core material heated in a heating furnace is placed on the lower mold, a skin layer material in which a cushion layer and a PvC sheet skin material are laminated is placed on top of it, and the upper mold is quickly pressed. Lower and press.

At the same time as the upper mold finishes lowering, the actuator is activated to push the slide mold toward the lower mold to attach and mold the tip of the door trim.

At this time, the upper blade does not come into contact with the lower mold, leaving a slight gap, and has a curved surface at the tip, so it cuts only the core material and does not cut the skin layer material.

The lower blade makes strong contact with the lower die and has a sharp sword-shaped tip, so it can easily handle the workpiece (core material and skin layer material).
completely cut off.

As a result, the door trim is formed with both an upper R part and a main body part, but a terminal part which is the tip of the upper R part.

Only the extra length of the skin layer material is formed.

(Example) An example in which the present invention is applied to a door trim as shown in FIG. 1, which is an interior part of an automobile, will be described in detail with reference to the drawings.

FIG. 2 is a sectional view of a mold device for molding the vicinity of the upper R portion 22 of the door trim 21. As shown in FIG.

The upper mold 31 and the lower mold 32 have the upper R part 22 of the door trim 21.
A curved surface 33 for forming is machined on the mold surface, and the workpiece 30 is press-bonded. Below the curved surface 33 of the lower mold 32, a stepped portion 35 is provided following the end mold surface 34 that forms the tip of the door trim.

The slide mold 36 is guided by the lower surface 31a of the upper mold 31 and slides by an actuator (not shown), and has an end molding part 37 at the top of its tip and an upper blade 38 having a curved surface continuous thereto. Further, a lower blade 40 with a tapered surface is formed below the upper blade 38 with a groove 39 in between, and the end molding part 37 and the end mold surface 34 of the lower mold 32 create pressure on the tip end 23 of the door trim. Gluing and molding are now possible.

As described above, the slide mold 36 is provided with an upper blade 38 and a lower blade 40 with a groove 39 in between, and the lower blade 4
0 is in contact with the lower mold 32, the upper blade 3
8 is located slightly outside the position of the lower blade 40 and has a curved shape so that a slight gap is formed between the lower mold 32 and the end mold surface 34 thereof.

The present embodiment is constructed as described above, and operates as follows. As in the conventional example, the workpiece 30 is heated in a heating furnace (not shown).

First, a heated resin core material 29 is placed on the lower mold 32, and a skin layer material 28 in which a polypropylene foam cushion layer material 27 and a PVC sheet skin material 26 are laminated is placed on top of the heated resin core material 29. , quickly push down the upper mold 31 and press as shown in FIG.

At the same time as the lowering of the upper mold 31 is completed, an actuator (not shown) is activated to push the slide mold 36 toward the lower mold 32 as shown in FIG. 3, thereby pasting and molding the tip 23 of the door trim 21. . At this time, the upper blade 38 does not come into contact with the lower die 32, leaving a slight gap, and
Since the tip has a curved surface, it cuts only the core material 29 and does not cut the first skin layer material 286. On the other hand, the lower blade 40 strongly contacts the stepped portion 35 of the lower die 32 and has a sharp sword-like tip. Since the cutting edge is processed, the workpiece 30 (core material 29 and skin layer material 28) is completely cut.

As a result, the door trim 21 is formed with an upper R section 22 and a main body, but as shown in FIG.
An extra length portion 41 is formed.

Incidentally, the length of the extra length portion 41 is sufficient as long as it is folded into the core material 29 side on the back side in the final assembly process and is sufficient to cover the end portion.

In the above embodiment, a curved surface is formed at the tip of the upper blade 38, and a groove 39 is provided between the upper blade 38 and the lower blade 40. However, the upper blade 38 can cut the core material 29, and is not limited to this. The size of the curved surface does not matter as long as it does not damage the epidermal layer, and a tapered surface may be used. The same effect can be obtained by connecting the upper blade 38 and the lower blade 40 with a curved surface or taper without providing the groove 39. .

<Effects of the Invention> The present invention provides an upper mold and a lower mold for overlapping a soft skin layer member on a hard core material, applying pressure to the surface material, and bonding and molding the end of the facing member integrally. In a method of molding using a slide mold placed on the side of the mold, an upper blade and a lower blade are formed at a distance from each other at the tip of the slide mold, and after pressing the end of the facing member by the operation of the slide mold, The structure is characterized in that the core material is cut by the upper blade, and the skin layer member protruding from the slide mold is cut by the lower blade, leaving an extra length, so that the slide mold can be slid. Since there is no sharp blade at the tip of the upper blade of the slide mold when forming the tip of the door trim, it can be formed neatly without damaging the skin material, and unlike conventional methods, there is no need to expose the cushion material, protrude, or damage the skin material. Insufficiency and irregular breakage were prevented, and the quality in terms of appearance was significantly improved, and effects such as improved yield were also obtained.

Also, by leaving one extra skin layer and folding it back to the back side, it was possible to make the terminal even more beautiful.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the door trim shape of an embodiment according to the present invention, FIG. 2 is an enlarged side view of a mold used in the treatment method of the present invention, and is a diagram showing one process using the mold, and FIG. Figure 4 is an enlarged side view similar to Figure 2, showing other steps; Figure 4 is a side view of a press-molded product produced by the treatment method of the present invention; Figure 5 is an enlarged side view of a mold used in the conventional treatment method. FIG. 6 is a side view of a press-molded product produced by a conventional processing method. 1.2...Top, bottom mold, 3...Slide mold, 7.26
... Skin material, 8.27 ... Cushion layer, 10.2
9... Core material, 21... Door trim, 23... Door trim tip, 31... Upper mold, 32... Lower mold, 33
... Curved surface part, 34 ... End mold surface, 35 ... Step part,
36...Slide mold, 37...Terminal molding surface, 38.
...Top blade, 40...Bottom blade, 41...Extra length.

Claims (1)

[Claims] A soft skin layer member is overlaid on a hard core material, and the ends of the surface member, which are integrally bonded and molded by applying pressure to the above-mentioned two materials, are attached to slides placed on the sides of the upper and lower molds. In the method of molding, an upper blade and a lower blade are formed with a space between them at the tip of the slide mold, and after the end of the facing member is pressed by the operation of the slide mold, the core material is cut by the upper blade. At the same time, a method for treating an end of a facing member, characterized in that the skin layer member protruding from the slide mold is cut by the lower blade, leaving an extra length.