JPS6311312A - Manufacture of molded product with sheetlike decorative member - Google Patents

Abstract

PURPOSE:To make a sheet like decorative member attractive, while molding and simultaneously sticking said decorating member at a specified place of a molded product without slipping from a position, and shielding the end of the decorative member from outside by a method in which the sheet like decorative member is set at a specified place of a mold, and its end is erected along the inner surface of a partition and is fixed at the top of the partition. CONSTITUTION:A sheetlike decorative member 3 is set on a molding surface in a specified range A divided by a partition 12 in such a manner that its front surface is in contact with said molding surface, and its end is erected along the inner surface of the partition 12 and is fixed at the top of the partition 12. Then, after both molds 1, 2 have been clamped, a molding material is injected into a cavity by a conventional injection molding. After the molding material has been cooled, both molds 1, 2 are opened, and a sprue is removed. Then, a molded product in which the sheetlike decorative member 3 is stuck on the surface of the portion 4 of the molded material is obtained. As the sheetlike decorative member 3, a synthetic resin sheet, woven cloth, unwoven fabric, knitted fabric, carpet and a composite laminate sheet composed of said materials, are used. The molding material is thermoplastic resin or thermoplastic elastomer, etc.

Description

[Detailed Description of the Invention] This invention relates to a method for manufacturing a molded article with a sheet-like decorative material A, and more specifically, a sheet-like decorative material is attached to the surface portion, and the sheet-like The present invention relates to a method for manufacturing a molded article in which the end of a decorative material is hidden inside a narrow groove by injection molding, pressure molding, or press molding.

If hard molded objects made by pultrusion molding, pressure molding, or press molding are used as they are for interior trim parts for vehicles or housings for household electrical appliances, the surface decoration and cushioning properties will be poor. It felt bad. For this reason, cloth or cushioning decorative materials are sometimes attached to the surface of these molded products. However, such pasting is a complicated work and is almost impossible if the part of the molded product to be pasted has a curved surface, and even if it is flat, if the decorative material is thick, the ends may be damaged. It has the disadvantage that it is unsightly and easily peels off from the terminal.

- There is also a method of attaching a decorative film to the molding surface of a perfect mold, then injection molding the molded body material and pasting the decorative film partially on the surface of the molded body, but in this case, if the decorative film is thin When using thick decorative materials,
In particular, if the end is not brought into close contact with the molding surface of the mold, the molded body material injected at the end will enter between the decorative material and the molding surface, significantly deteriorating the appearance. Note that it is difficult to tightly attach the end of the decorative material to the molding surface of the mold before molding, and to easily separate it from the molding surface of the mold after molding.
Decorative materials sometimes peeled off.

This invention applies to molded objects including curved surfaces, even if the sheet-shaped decorative material A is a thick material, as in the case of a thin material. The sheet-shaped decorative material is attached to a predetermined position of the molded body at the same time as the molded body material is molded, and the end thereof is hidden inside the molded body. L to do j′
This is the first objective.

■The manufacturing method of the sheet-like decoration + A I-, 1 molded body of this invention consists of a pair of molds that form a cavity of a predetermined shape by mold clamping. A partition wall is provided at a desired position on the molding surface, and the front side of the sheet-shaped decorative material is laid on the molding surface in a predetermined area divided by the partition wall, and the end portion of the sheet-shaped decorative material is placed along the inner surface of the partition wall. The end of the sheet-like decorative material that has been twisted or twisted vertically is locked at the top of the partition wall, and after the pair of molds are clamped, the molded body material is injected into the cavity. Alternatively, the molten material is distributed between the molding surfaces of a pair of molds and the molds are clamped, so the drawbacks of the conventional molds can be overcome.

In addition, I
The front side of the sheet-like decorative material may be laid on the molding surface of a predetermined area by vacuum forming the sheet-like decorative material or holding it by suction by increasing the JI' function to 1+iH.

1-21 Since the method for producing a molded article with a sheet-like decorative material according to the present invention is configured as described above, the ends of the sheet-like decorative material can be made to stand along the inner surface of the partition wall. , is further fixed on the top of the molded body, and after the molded body material is molded, a narrow groove corresponding to the partition wall of the mold is formed at the bottom of the narrow groove of the molded body.

Therefore, the end portions of the sheet-shaped decorative material are hidden from the outside, giving a good appearance.

In addition, because the partition wall prevents the molded body material from entering between the sheet-shaped decorative material and the molding surface, the part of the molded body surface where the sheet-shaped decorative material is pasted and the part made of the molded body material are separated. The boundaries between the sheets are clear without loosening, which makes the sheet-like decorative material stand out, resulting in a beautiful appearance.

Furthermore, the sheet-like decorative material is molded under the same pressure as a carpet.
In the case of a material whose thickness is compressed, it expands again after molding, so that the narrow grooves are filled.

Actual Journey Example Please refer to the drawings for an embodiment of this invention! 1 (Explain while reading.

FIG. 1 is a sectional view of a pair of molds for producing a sheet-like decorative +A molded body by injection molding of the present invention. The pair of molds consists of a movable mold 1 and a fixed mold 2. When both molds I and 2 are clamped, a cavity corresponding to the shape of a predetermined molded body is formed.

At the position q-H of the molding surface 11 of the movable mold 1, (~j there is a partition wall 1
2 is provided, and the fixed mold 2 has a bush 2/1 with a sprue hole 23 and a locate ring 2, similar to a normal mold.
5 or 1 belong.

Sheet-shaped decoration) rA' 3 is laid so that its front side is in contact with the molding surface 11 in a predetermined area A divided by partition walls 12 as shown in FIG. ; The section extends vertically along the inner surface of the partition wall 12 and engages at the top of the partition wall 12.

Next, as shown in FIG. 2, after both molds 1.2 are clamped, the molded body material is injected into the cavity by the usual injection molding method. After cooling the molded body 1, the molds 1 and 2 are opened and the sprue is removed. As shown in FIG. can get.

The sheet-shaped decorative material 3 used in the present invention includes synthetic resin sheets, woven fabrics, non-woven fabrics, knitted fabrics, carpets, and composite laminated sheets of these materials. The back side of such a sheet-shaped decorative material is coated with a heat-resistant resin film or metal foil to withstand the heat of the injection material and the shearing force during flow; and to improve adhesion with the injection material. It is best to stick it on the entire surface or on the 1st floor of the injection material or at the position where it will come into contact for the first time.

The material of the molded body is thermoplastic resin or thermoplastic elastomer.
Organic and inorganic fillers may be added to these raw materials. Injection of the molded material into the cavity is carried out by a pressure molding method in addition to the injection molding method described above.

The partition wall 12 embedded in the molding surface 11 is generally made of metal, and if it is made thin enough to withstand the pressure during molding, the width of the narrow groove formed in the molded product by the partition wall 12 will be narrowed, resulting in a good appearance.

When the top of the partition wall 12 is made into a saw blade shape, the sheet-like decorative material 3, especially thick, will not move due to the flow of the molded body + 1 H, which expands at the end of the fiber-like navy blue mouth 1 during molding. The partition wall 12 is usually buried in the mold opening direction of both molds 1 and 2, or in the case of a sheet-like decorative layer or thick cushioning material, the partition wall 12 is placed inside and outside a predetermined area to some extent. It is possible to take out the molded article with sheet-like decorative material from both molds 1.2 even if the sheet-like decorative material is tilted.In this case, the end of the sheet-like decorative material is stored deep inside the narrow groove, so that the front side It becomes completely invisible.

In the case of Fig. 3, it is an example in which carpet is used as the sheet-like decorative material A3, or when the molded body material is injected, it is less than When opened, the sheet-like filler material +A' 3 expands and fills the narrow groove, and its surface protrudes from the other molded body material portions 4. In order to avoid this, the molding surface 1 within the predetermined area A must be
It is a good idea to raise the sheet-shaped decoration $43 to a thickness that is compressed.

In addition, if the strength of the molded body 5 is reduced due to the presence of the partition wall 12, providing a full 22 on the molding surface 21 at the corresponding position of the fixed mold 2 will form ribs on the molded body 5, making it stronger and increasing the strength of the molded body material. Fluidity within the capacity is improved.

In the embodiment shown in FIGS. 1 to 3, the sheet-shaped decorative material 3 is laid on the flat molding surface 11 in a predetermined area A, but even if the molding surface in that area has a curved surface or small irregularities, the sheet The material of the shaped decorative material 3 that follows the shape of the molded body material during molding can be changed without preforming the sheet-shaped decorative material 3.

However, if there are large irregularities on the molding surface in the predetermined area A, it will be difficult for the sheet-like decorative material 3 to follow the molding surface, so as shown in FIG. ) The sheet-shaped decorative material 3 is compressed and preformed by a lower mold 16 having the same molding surface as the molding surface 11 having unevenness in a predetermined area, and an upper mold 26 corresponding to the lower mold 16. It's a good idea to leave it there. At this time, when the sheet-shaped decorative material 3 is made of a textile product, if a thermoplastic synthetic resin film is laminated on the back side of the material in advance, the shape retention after the molding is improved. It is also possible to provide the lower mold 16 with an exhaust function and vacuum form the sheet-like decorative material 3 to shape it.

In addition, the lower mold 16 is placed in a predetermined position of the movable mold 1 as a nested mold, and the sheet-like decorative material 3 is first placed between the mold 26 and the movable mold 1.
The bottom +1' that left! ] 6.Mold in a hand pan, lower mold 1
By attaching the lower part 16 to the movable mold 1 while leaving the 11 pieces on the molding surface of 6, the sheet-shaped decorative material 3 can be laid on a predetermined molding surface.

Ct for pre-forming the sheet-shaped decorative material ;), and a predetermined amount 1. Molding surface 11 of liA
A large number of exhaust holes 13 are drilled in the IJI hole 13, and the other end of the IJI hole 13 is connected to an exhaust pump (not shown) through an exhaust groove 14 and an exhaust pipe 15. Phase 33 can be directly formed into a P1 crystal. At this time, the opening diameter of the IJI pores 1; 3 on the molding surface 11 side is 0.2 to 0.7 mm, and the sheet-shaped decorative material 30+
The opening diameter is determined by the A quality and the injection molding pressure so that there are no holes on the surface of the sheet-like decorative material 30 after molding. In order to shape the sheet-like decorative material 3 by vacuum forming as described above, it is recommended to laminate a thermoplastic resin film on the back side of the material to make it non-air permeable (the pull should not be less than 10-).

Note that the sheet-shaped decorative material 3 is not vacuum-formed using the apparatus shown in FIG. The molded body material may be injected.

In addition, if the molding surface in a predetermined area is provided with an exhaust function in this way, it is possible to lay unformed or preformed sheet-shaped decorative material while suctioning it without causing wrinkles on the molding surface. can.

As another example, as shown in FIG. 6, a pair of molds 19 and 29 form a cavity of a predetermined shape by mold clamping.
A partition wall 12 is provided at a desired position on the molding surface 11 of the lower die 19,
The front side of the sheet-shaped decorative material 3 is laid on the molding surface of a predetermined area divided by the partition wall 12, and the end of the sheet-shaped decorative material 3 is raised along the inner surface of the partition wall 12, or Or, the end of the raised sheet-like decorative material 3 is connected to the partition wall 12.
, and after placing a fixed amount of the molten material N6 on the molding surface 11 of the lower mold 19 directly or via the sheet-like decorative material 3 at a predetermined position, the mold is clamped, After cooling, the mold 19.29 is opened to obtain a molded body 5.

To place the molten resin externally, for example, a stamping molding machine of model 15M-800 manufactured by Ikegai Iron Works Co., Ltd. is used, and the required amount of the molded material 6 can be mechanically distributed to predetermined positions.

The material for the molded body used in this embodiment can be selected from a wide range of materials since it is possible to apply a paste having lower fluidity when melted than in the case of injection molding.

Further, the partition wall 12 is not continuous, and may be replaced with a partition wall made of an array of metal bottles, for example.

In all of the above embodiments, the predetermined area divided by the partition walls has been described as one location, but the predetermined area may be provided in multiple locations.

In addition, if it is necessary to attach the sheet-shaped decorative material to the edges of the molded object, the molded object material may leak into the mold when molding, or the sheet-like decorative material may be attached to the front side of the sheet-shaped decorative material. In order to prevent the intrusion, for example, as shown in FIGS. 7 and 8, when the mold is clamped, the movable mold I and the fixed mold 2 sandwich the end of the sheet-shaped decorative material 3, or the sheet-shaped decorative material 3 is If measures such as adjusting the amount of material placed so that the end of the sheet-shaped decorative material becomes the end of the flow of the molten material are taken, the sheet-shaped decorative material shown in FIGS. Since no partition wall is provided at the right end of No. 3, it is not necessary to provide a partition wall all around the predetermined area. Figure 9 shows
When obtaining a molded body by press molding as shown in Fig. 6,
An embodiment similar to FIG. 7 is shown.

The method for manufacturing the sheet-like decorative material-attached molded article of this invention is as follows.
Since it is configured as mentioned above, it has the following effects.

After the molded body material has been molded, the sheet-shaped decorative material is simply placed at a predetermined position in the mold, and raised along the inner surface of the partition wall at the end, or further secured to the top of the partition wall. In this case, the end portion of the sheet-like decorative material is present at the bottom of the molded body in which narrow grooves corresponding to the partition walls of the mold are formed. Therefore, the effort of pasting the sheet-shaped decorative material in a subsequent process is saved, and the decorative material can be pasted at a predetermined position of the molded body at the same time as the molding without any displacement. In addition, the ends of the sheet-shaped decorative material are hidden from the outside, so they look good.

In addition, the partition wall prevents the molded body material from entering the Br, 1 between the sheet-shaped decorative material and the molded surface, so that the molded body material is separated from the part on the surface of the molded body to which the sheet-shaped decorative layer is attached. Since the boundaries between parts are clear without loosening, the sheet-like decorative material stands out and its appearance becomes beautiful.

In the case of a material whose thickness is compressed by molding pressure, such as a carpet, it expands again after being molded and taken out of the mold, so the narrow grooves are filled and the sheet-like decorative material The boundary between the part and the phase part of the molded body is close and makes the boundary stand out.
Gives 1v and soft feeling by 1=J.

[Brief explanation of drawings]

Figure 1 is a sectional view showing an example of a state in which a pair of molds used in the present invention and a sheet-like decorative material are laid, and Figure 2 shows a state in which the pair of molds are clamped from the state shown in Figure 1. FIG. 3 is a cross-sectional view of a molded body with a sheet-like decorative material obtained through the state shown in FIGS. 1 and 2, and FIG. FIG. 5 is a cross-sectional view of the upper and lower molds for preforming a sheet-like decorative material in an example. FIG. is a cross-sectional view showing a state in which a sheet-shaped decorative material is laid on a molding surface and a molten material is further placed on the outside in another embodiment, and FIGS. 7 and 8 show still another embodiment. FIG. 9 is a sectional view similar to FIG. 1 and FIG. 2, and FIG. 9 is a sectional view similar to FIG. 7 in yet another embodiment. 1.2.19.29... Pair of molds 3... Sheet-shaped decorative material 5... Molded body with sheet-shaped decorative material 6... Molten body material A...・・Specified area

Claims (2)

[Claims] (1) A partition wall is provided at a desired position on the molding surface of a pair of molds that form a cavity of a predetermined shape by mold clamping, and the front side of the sheet-shaped decorative material is laid on the molding surface in a predetermined area divided by the partition wall. At the same time, the end of the sheet-shaped decorative material A is raised along the inner surface of the partition wall, or the end of the raised sheet-shaped decorative material is locked at the top of the partition wall, and a pair of molds are formed. After clamping the mold, inject the molded material into the cavity, or
Alternatively, a method for producing a molded body with a sheet-like decorative material, characterized in that the molded body material in a molten state is distributed and placed between the molding surfaces of a pair of molds, and then the molds are clamped. (2) The molding surface of a predetermined area divided by the partition wall of the mold is equipped with an exhaust function, and the front side of the sheet-shaped decorative material is vacuum-formed or held by suction. A method for producing a molded article with a sheet-like decorative material according to claim 1, which is laid on a molding surface.