JP2876238B2 - Terminal treatment method for surface mounting members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a surface member or a skin material or a skin layer made of a soft member, which is used in interior parts such as car doors and instrument panels, and household furniture. The present invention relates to a terminal treatment method for a front cover member in which a core member made of a member is overlapped and integrally attached.

<Prior Art> Many of interior parts such as doors and instrument panels of automobiles and exterior members such as sofas, desks and walls at home are composed of composite layers and are adhered by heating and pressing.

That is, a cushioning material such as a urethane pad or a polypropylene foam is laminated (laminated) on the back side with a sheet made of PVC or the like as a skin surface to form a soft skin layer member, and a resin soft material is further added to the soft member. After heating a stack of core members, the core member is placed on a mold and pressed by a press to form a pattern on a pressure bonding surface and a skin surface.

Japanese Patent Application Laid-Open No. 63-1988 discloses a method for manufacturing such a surface mounting member.
It is proposed by 199628 publication and the like.

That is, Japanese Patent Application Laid-Open No. 63-199628 discloses a slide mold in which a door trim for an automobile or the like having a curved end portion is formed by pressing from the lateral direction in addition to the upper and lower molds. Is used to cut a door trim or the like.

FIG. 5 shows an enlarged cross-sectional view near the end of such a slide-type press molding apparatus. In addition to the upper die 1 and the lower die 2, the slide die is guided by the lower surface of the upper die 1 and moves in the lower die direction. A slide mold 3 to be pressed is provided.

An undercut portion 4 for forming a front end portion of the door trim is provided at an upper end portion of the slide die 3,
The toothed portion 5 at the tip end is in contact with the lower surface of the lower die 2, and cuts off an unnecessary portion of the workpiece 6 when the slide die 3 is pressed toward the lower die 2.

<Problems to be Solved by the Invention> However, when the slide die 3 shown in FIG. 5 is operated to form, for example, the distal end of the door trim 6, the toothed portion 5 at the distal end of the slide die 3 has an acute angle. Surface material 7 of the workpiece 6 (door trim)
And the cushioning material 8 are cut into the skin layer member 9 on which the laminate is laminated, and the skin layer member 9 is cut while being extended at the time of sliding.

As a result, as shown in FIG. 6, the end portion 11 of the finished product has insufficient dimensions because the skin material 7 contracts and returns to its original state, and the cut surface is also a jagged irregular surface. On the other hand, cushion material 8
This also became tattered and was exposed, and the quality in appearance was reduced and sometimes defective. For this reason, problems have arisen not only in terms of cost but also in terms of processes, and early solution has been an issue.

An object of the present invention is to solve the above problems and to provide a terminal processing method for manufacturing a product having a good and beautiful terminal shape and a 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 presses and presses the two materials together to form a single body. In the method of molding the terminal of the front mounting member by a slide die disposed on the side of the upper die and the lower die, the slide die tip portion is formed by providing an upper blade and a lower blade at an interval, and the slide die is formed. After the end of the surface member is pressed by the operation, the core material is cut by the upper blade, and the skin layer member protruding from the slide die is cut by the lower blade leaving an extra length.

<Operation> The present invention is configured as described above, and operates as follows.

First, a resin core material heated by a heating furnace is placed on a lower mold, and a skin layer material in which a cushion layer and a PVC sheet skin material are laminated is arranged thereon, and the upper mold is quickly pressed. Lower and press.

At the same time when the lowering of the upper mold is completed, the actuator is operated to push the slide mold toward the lower mold, and the tip of the door trim is attached and molded. At this time, the upper blade does not come into contact with the lower mold and has a slight gap, and has a curved surface at the tip, so that only the core material is cut, and the skin layer material is not cut. On the other hand, since the lower blade has a strong contact with the lower mold and is processed into a sharp sword-like cutting edge, the workpiece (the core material and the skin layer material) is completely cut.

As a result, the door trim is formed in both the upper R portion and the main body portion, but a surplus portion of only the skin layer material is formed in the terminal portion which is the tip of the upper R portion.

<Embodiment> An embodiment 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 apparatus for molding the vicinity of the upper R portion 22 of the door trim 21.

The upper die 31 and the lower die 32 are each formed with a curved surface 33 for forming the upper R portion 22 of the door trim 21 on a die surface, and the workpiece 30 is press-pressed. Below the curved surface 33 of the lower mold 32, a step 35 is provided following the end mold surface 34 forming 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), but a terminal forming part 37 and an upper blade 38 having a curved surface continuous with the terminal forming part 37 at the upper end thereof. A groove 39 is provided below the upper blade 38.
A lower blade 40 having a tapered surface is formed by sandwiching the lower end 40, and the terminal forming portion 37 and the end die surface 34 of the lower die 32 are used to perform pressure bonding and molding of the distal end portion 23 of the door trim.

The slide die 36 has an upper blade 38 and a lower blade 40 as described above.
The upper blade 38 is provided between the end mold surface 34 of the lower die 32 even when the lower blade 40 is in contact with the lower die 32. So that there is a gap
It is slightly outside the position of the lower blade 40 and has a curved shape.

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

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

At the same time when the lowering of the upper mold 31 is completed, an actuator (not shown) is operated, and the slide mold 36 is moved to the lower mold 32.
Side, as shown in FIG.
Is attached and molded. At this time, the upper blade 38 does not come into contact with the lower mold 32 and has a slight gap, and has a curved surface at the tip, so that only the core material 29 is cut, and the skin layer material 28 is not cut. On the other hand, since the lower blade 40 is strongly abutted against the step 35 of the lower mold 32 and the tip is machined into a sharp sword-like blade,
The work material 30 (the core material 29 and the skin material 28) is completely cut.

As a result, the door trim 21 is also formed with the upper R portion 22 and the main body portion, but as shown in FIG.
An extra length portion 41 of only the skin layer material 28 is formed at the terminal portion 24 which is a further tip of the 23.

The length of the extra length 41 may be sufficient to be bent toward the core 29 on the back side in the final assembly process and to cover the end.

In the above embodiment, a curved surface is formed at the tip of the upper blade 38, and the groove 39 is provided between the upper blade 38 and the lower blade 40. However, the present invention is not limited to this. Since it is only necessary to damage the skin layer, the size of the curved surface does not matter, and it may be tapered. The upper blade 38 and the lower blade 40 without the groove 39 are provided.
The same effect can be obtained by connecting the surfaces with a curved surface or a taper.

<Effects of the Invention> The present invention relates to an upper mold and a lower mold, which are obtained by laminating a soft skin layer member on a hard core material, and pressing and pressing the two materials together to form an end of a surface mounting member. In the method of molding with a slide die disposed on the side of the die, at the tip of the slide die, an upper blade and a lower blade are formed at an interval, and after pressing the front mounting member terminal by the operation of the slide die, By cutting the core material with the upper blade and cutting the skin layer member protruding from the slide mold with the lower blade while leaving an extra length, the slide mold slides. Because the sharp edge is not provided at the tip of the upper blade of the slide mold when forming the door trim tip,
It can be molded neatly without damaging the skin material, preventing the cushion material from being exposed, protruding, shortage of the skin material and irregular cutting as in the past, significantly improving the appearance quality and improving the yield, etc. The effect was also obtained.

In addition, since the extra skin layer portion was left and folded back, the terminal could be made more beautiful.

[Brief description of the drawings]

FIG. 1 is a view showing a door trim shape of an embodiment according to the present invention, FIG. 2 is an enlarged side view of a mold used in the processing method of the present invention, and a view showing one process using the mold, and FIG. FIG. 4 is an enlarged side view similar to FIG. 2 showing other steps, FIG. 4 is a side view of a press-formed product by the processing method of the present invention, and FIG. 5 is an enlarged side view of a mold used in a conventional processing method. FIG. 3 is a view showing the same steps as in FIG. 3, and FIG. 6 is a side view of a press-formed product obtained by a conventional processing method. 1, 2, top, bottom, 3 ... slide, 7, 26 ... skin material, 8, 27 ... cushion layer, 10, 29 ... core, 21 ... door trim, 23 ... door trim tip Part, 31 ... upper mold, 32 ... lower mold, 33 ... curved surface part, 34 ... end mold surface, 35 ... stepped part, 36 ... slide type, 37 ... terminal molding surface, 38 ... Upper blade, 40 ... Lower blade, 41 ... Extra length.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Eiji Takeuchi 2100 Endo, Fujisawa-shi, Kanagawa Press industry inside Fujisawa plant (56) References JP-A-62-244612 (JP, A) JP-A-63- 41121 (JP, A) JP 62-41858 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B29C 51/00-51/46 B29C 33/00-33/54

Claims (1)

(57) [Claims] An end of a surface mounting member obtained by laminating a soft skin layer member on a hard core material and pressing and adhering the two members together is molded into a side portion of an upper die and a lower die. In the method of molding with a slide die disposed in the slide die tip portion, an upper blade and a lower blade are formed at intervals, and after pressing the front end member by the operation of the slide die, the upper blade is used. A terminal treatment method for a surface-mounted member, wherein the core material is cut, and a skin layer member protruding from the slide mold is cut by the lower blade leaving an extra length.