JPH06114881A - Skin material laminating molding apparatus - Google Patents

Abstract

PURPOSE:To laminate a skin material at the time of molding a core material and to largely delete molding steps by vacuum molding the material in a vacuum mold, then injection molding resin while clamping the skin material molds together with the material in its cavity. CONSTITUTION:A cavity mold 12 to be vacuum molded is mounted on a lower surface of a ram 11 of a press 13. A skin material 17 is sent to a heating unit together with a skin frame 27, heated to be softened, and conveyed to the mold 12. The material 17 is sucked to be held in the mold 12, and the frame 27 is returned. The mold 12 is moved down, and when it reaches a suitable position of a core mold 30, resin is supplied from an injection unit 31 to the mold 30. Then, the ram 11 is further moved down, and a core material is press-molded together with the material 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus for a resin molded product in which a skin is integrally molded on the surface of a core material, and in particular, the skin material can be integrally bonded during injection molding of the core material. The present invention relates to a composite device for attaching a skin material.

[0002]

2. Description of the Related Art For example, a conventional instrument panel molding process for producing a synthetic article with a skin material such as an instrument panel for automobiles is as shown in FIG. 1 (a).
Instrument panel skin by vacuum-molding the softened laminate sheet 3 with a vacuum molding die 5 by sandwiching the edges of a laminate sheet 3 composed of a vinyl chloride skin 1 and an olefinic foam sheet 2 with a clamp 4 to soften it by heating. Obtain material 3 '.

In another molding process, the instrument panel core material 6 is injection molded by an injection molding machine.

Next, an adhesive is applied to the separately molded instrument core material 6, and the instrument panel skin material 3'is adhered to the surface of the core material 6 through this adhesive, and then, The finished instrument panel 7 shown in FIG.
Is what you get.

[0005]

However, in such a conventional instrument panel structure, the core material 6 and the skin material 3'are separately formed in different steps, and then the surface of the core material 6 is formed. Since it has a structure in which the skin material 3'is attached via an adhesive, for example, in the above skin material 3 ', the contraction of both the molded skin material and the core material slightly changes from lot to lot. However, since molding dimensions vary, a molded product with poor bonding is produced when the core material 6 is bonded. Further, since the core material 6 and the skin material 3'are molded in separate steps, it is necessary to manage the core material and the skin material such as movement and storage, which is a factor that deteriorates productivity. There was a problem that there were many things.

[0006]

The present invention has been made by paying attention to such a conventional problem, and after vacuum forming a skin material with a vacuum forming die, the skin material is formed into a vacuum forming die. Without releasing from the cavity mold, the cavity mold is closed together with the skin body with the mold for molding the core material, and the resin for molding the core material is injected into the mold to be molded integrally with the skin material. By doing so, it is an object of the present invention to provide a skin material-attached composite type device capable of improving product quality and obtaining a product excellent in productivity and economy.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the embodiments shown in the drawings.

In FIG. 2, 11 is a press ram, and a vacuum moldable cavity mold 12 is attached to the lower surface of the press ram 11. Reference numeral 13 is a press machine capable of vertically moving the press ram 11 together with the cavity mold 12, 14 is a vacuum device for negatively pressing the mold surface of the cavity mold 12, and 15 are provided on both sides of the cavity mold 12, which will be described later. A cylinder for pulling up a skin frame is shown.

Reference numeral 16 denotes a skin material supply unit. This skin material supply unit 16 has a large number of sheets obtained by laminating an olefinic foam sheet and a vinyl chloride skin in the same manner as the laminate sheet 3 described in the conventional example. Skin material 17
It has a pallet 18 having a plurality of layers and a lift 19 for moving the pallet 18 up and down.

Reference numeral 20 denotes a skin material carrier having a plurality of suction cups 21 for sucking the uppermost skin material 17 stacked on the pallet 18 and a cylinder 22 for moving the suction cups up and down. 20 is horizontally reciprocated by a driving means (not shown) between the skin material supply unit 16 and the skin frame moving unit 24 along a guide rail 23 positioned in the horizontal direction.

Reference numeral 25 denotes a heating unit, and a moving frame 26 is installed so as to extend between the heating unit 25 and the skin frame moving unit 24.
The outer skin frame 27 placed thereon can be moved along the moving frame 26 by the conveyor means 28. Further, inside the heating unit 25, a heater 29 for heating and softening the skin material 17 is arranged vertically.

Reference numeral 30 is a core mold corresponding to the cavity mold, and the core mold 30 has a resin injection unit 31.
A passage 33 through which the plasticized resin injected from the screw nozzle 32 flows toward the mold surface is provided. Reference numeral 34 is a seal frame for making the inside of the mold airtight when the core mold 30 and the cavity mold 12 are closed, and 35 is a seal frame 34.
An air cylinder for moving up and down, 36 is a skin material 1
7 is a pin for pinning the peripheral edge, 37 is a pneumatic device for assisting the molding of the skin material, and 38 is its pressure reducing valve.

The structure of this embodiment has been described above. Next, its operation will be described.

First, the uppermost skin material 17 in the skin material supply unit 16 is sucked into a suction cup 21 provided on the skin material carrier 20, and the skin material carrier 20 is moved along a guide rail 23 to form a skin frame. Carry to the mobile unit 24. Then, the cylinder 22 is pressed by the lowering action of the cylinder 22 onto the skin frame 27 waiting on the moving frame 26.

The skin material 17 placed on the skin frame 27 is
It is sent into the heating unit 25 together with the skin frame 27 by the power of the conveyor means 28, and is heated by the heater 29, and this heating softens the skin material 17 on the skin frame 27. When the skin material 17 is heated, the moving frame 2
By the forward movement of 6, the heated skin material 17 is carried under the cavity mold 12 together with the skin frame 27.

Then, the cylinder 15 operates to pull up the skin frame 27 together with the softened skin material 17 and join the softened skin material 17 on the skin frame 27 to the cavity mold 12. Immediately after that, the vacuum device 14 operates to hold the heated skin material 17 in the cavity mold 12 by suction molding. Next, the skin frame 27 pulled up together with the skin material 17 is returned to the moving frame 26 by the lowering operation of the cylinder 15, and the moving frame 2 is further moved.
6 carries the skin frame 27 and returns to the inside of the heating unit 25, and the skin frame 27 returned to the inside of the heating unit 25 is returned to the original position inside the skin frame moving unit 24 by the operation of the conveyor means 28.

Then, the cavity mold 12 is lowered by the operation of the press machine while adsorbing the skin material 17, and the cavity mold 1
When 2 reaches an appropriate position of the core mold 30, a fixed amount of resin injected from the screw nozzle 32 of the resin injection unit 31 is supplied into the core mold through the passage 33. Next, the press ram 13 is further lowered to press the resin in the core mold by the cavity mold, whereby the core material integrated with the skin material 17, that is, the skin material-attached composite product is press-molded.

In the above-mentioned embodiment, the method of vacuum forming the skin material 17 is used. However, for example, the heated skin material 17 is pinned to the pin 36 of the cavity mold 12 to press the press ram 1.
1 is lowered and vacuum-formed, and further lowered until it is bonded to the core mold 30, and pressurized air is supplied from the compressed air device 37 from the core mold 30 to reliably perform molding. After that, the press ram 11 is raised to a proper position, resin is injected, and pressure is applied, so that it is possible to obtain an integrally bonded composite product of the skin material 17 and the core material 6.

As described above, in this embodiment, after the skin material is vacuum-formed into a predetermined shape with the cavity mold, the core material is closed while closing the cavity mold with the skin material being vacuum-adsorbed. Since it is a device that supplies resin for molding into the mold and press-molds the core material integrated with the above-mentioned skin material, the bondability between the skin material and the core material is good, and moreover, the skin material during the molding process. Since the mold is not released from the cavity mold, for example, the flow (collapse) of the grain pattern formed on the surface of the skin material does not occur, and thus a skin-bonded synthetic shaped article having excellent quality can be obtained. Further, according to this, since the skin material is attached at the time of molding the core material, the molding process can be significantly reduced.

[0020]

As described above, according to the present invention, the skin material 17 is set on the skin frame 27 and moved to an appropriate position, the skin frame moving unit 24, the moving frame 26, and the heating unit 25 for heating the skin material 17. A cavity mold 12 for vacuum-suction molding the heated skin material 17, a core mold 30 corresponding to this cavity mold, and a cavity mold 12 for which the skin material 17 is still vacuum-sucked. Drive means for operating, cavity mold 12 and core mold 30
Before the and are closed, the resin supply means for injecting the molten resin onto the die surface of the core die 30, the skin material still set in the cavity die and the injectable resin in the core die are pressurized. Since it is a skin material adhering / synthesizing device having a pressurizing means for forming a skin material, according to this, after the skin material is vacuum-formed into a predetermined shape by a cavity type, the skin material is vacuum-sucked into a cavity. While closing the mold with the core mold, it is a device that supplies resin for molding the core material into the mold and press-molds the core material integrated with the above-mentioned skin material. Since the moldability is good and the mold is not released from the skin material cavity mold during the molding process, for example, the flow (collapse) of the grain pattern formed on the surface of the skin material does not occur, and therefore the skin of excellent quality is obtained. A laminated product can be obtained.
Further, according to this, since the skin material is bonded at the time of molding the core material, there is an effect that the molding process can be significantly reduced.

[Brief description of drawings]

1 (a), (b), (c), and (d) are process explanatory views for manufacturing a synthetic material product with a skin material according to a conventional example.

FIG. 2 is a structural explanatory view showing an apparatus for laminating skin material according to an embodiment of the present invention.

[Explanation of symbols]

11 ... Press ram 12 ... Cavity type 13 ... Press machine 14 ... Vacuum device 15 ... Cylinder 16 ... Skin material supply unit 17 ... Skin material 18 ... Pallet 19 ... Lift 20 ... Skin material carrier 21 ... Sucker 22 ... Cylinder 23 ... Guide rail 24 ... skin frame moving unit 25 ... heating unit 26 ... moving frame 27 ... skin frame 28 ... conveyor means 29 ... heater 30 ... core type 31 ... resin injection unit 32 ... screw nozzle 33 ... passage 34 ... seal frame 35 ... air cylinder 36 ... Pin 37 ... Pneumatic device 38 ... Pressure reducing valve 39 ... Open / close valve

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical indication location B29L 31:58 4F (72) Inventor Hiroshi Miura 3-42, 9-chome, Minato-ku, Nagoya Company Sato Iron Works (72) Inventor Noriyuki Kanie 3-42, 9-ban, Minato-ku, Nagoya City Stock Company Sato Iron Works

Claims (1)

[Claims] 1. A skin frame moving unit (24) for setting a skin material (17) on a skin frame (27) and moving it to an appropriate position.
A moving frame (26), a heating unit (25) for heating the skin material (17), and the heated skin material (17)
A cavity mold (12) for vacuum suction molding, a core mold (30) corresponding to this cavity mold, and the skin material (1
Drive means for causing the cavity mold (12) in which vacuum suction of 7) is performed with the core mold (30) to close the mold;
Resin supply means for injecting molten resin onto the mold surface of the core mold (30) before the cavity mold (12) and the core mold (30) are closed, and a skin material that is still set in the cavity mold. And a pressurizing means for pressurizing the core in-mold injection resin.