JP2002264168A - Method for producing case part and case part produced by the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a case part with high production efficiency and the case part produced by the method. SOLUTION: First, a polyamide resin is packed in a core mold formed in the shape of a core 20 and solidified, and the core 20 is removed from the core mold. Next, a skin mold 2a is composed of a movable mold 34 and a fixed mold 32, an AS resin is packed in a filling space α formed in the shape of a skin 30 which is formed in a mold 32a by fitting the core 20 to the movable mold 34 and combining it with the fixed mold 32 and solidified, and a music stand 2 is removed from the mold 32a. By producing the music stand 2 in this way, since the skin 30 is laminated directly on the core 20, a production process which has required two processes of a skin manufacturing process and a lamination process so far for laminating the skin 30 on the core 20 can be replaced with one process. Consequently, the production efficiency can be improved greatly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a case component in which a resin skin is laminated on the surface of a core material, and to a case component manufactured by the manufacturing method.

[0002]

2. Description of the Related Art Conventionally, the case parts (music stand, wife base, etc.) 100 of a piano have been made as shown in FIG. As shown, a resin skin 101 is laminated on the decorative portion. The manufacturing process of this case component includes a core material making process, a skin making process, a laminating process,
Consisting of four steps of a polishing step, specifically, in the core material forming step, the timber is processed to form the core material 102,
In the skin forming step, as shown in FIG. 5B, a resin is injected into a filling space 114 that models the skin 101 formed between the inner mold 112 and the outer mold 113 of the skin mold 111, and the skin 101 is formed. In the laminating step, as shown in FIG. 5C, the skin 101 is fitted into the core 102, and the core 102
A foaming agent 103 serving as an adhesive is filled and foamed between the core material 102 and the skin material 101 to laminate the skin material 101 on the core material 102.
It has erased the scratches that have been made.

In the laminating step, the foaming agent 103 expands with a very large force when foamed.
In addition, the outer skin 101 is fixed by fitting it into a dedicated fixture 120, and the outer skin 101 is pressed against the fixture 120 with a strong force and is damaged. The polishing work is carefully performed so that the particles are not noticeable.

[0004]

However, in the above-mentioned manufacturing method, the core material 102 and the skin 101 are separately formed, and the skin 101 is laminated on the core material 102 (process). When laminating the core material 102 with the core material 102, the surface skin 101 is damaged, so that the surface skin 101 is polished (process), and a total of four work steps are required, resulting in a problem that the manufacturing efficiency is poor.

[0005] In addition, there is a problem that when the surface is polished by buffing, luster is lost and appearance quality is deteriorated. An object of the present invention is to solve the above-mentioned problems. A method for manufacturing a case component capable of efficiently manufacturing a case component, and improving the appearance quality of the case component, and a method for manufacturing the case component. The purpose of the present invention is to provide a case component.

[0006]

Means for Solving the Problems and Effects of the Invention The invention according to claim 1 for solving the above problems is a method for manufacturing a case component in which a resin skin is laminated on the surface of a core material, The core material is used as an inner mold of a skin mold for producing the same, and the skin formed between the core material and the outer mold is formed by combining the core material and an outer mold of the skin mold. Resin is injected into the filled space, and the skin is directly laminated on the surface of the core material.

In the present invention, since the skin is directly laminated on the core material by using the core material as the inner mold, the skin preparation step which was necessary since the skin and the core material were conventionally manufactured separately. In addition, the two manufacturing processes of the lamination process can be performed in one manufacturing process. In the present invention,
Since the skin is directly laminated on the surface of the core material without using a foaming agent, the skin is not damaged as in the case of the conventional manufacturing method. Therefore, in the present invention, the polishing step can be omitted.

Accordingly, when the case component is manufactured by the manufacturing method of the present invention, the number of steps is reduced by two steps, so that the manufacturing efficiency can be remarkably improved. Further, in the present invention, since buffing is not performed, the gloss of the skin before polishing is not lost, and the appearance quality is improved. Next, in the method for manufacturing a case component of the present invention,
It is preferable that the core is made of resin. In this way, since the demand for nature protection has been increasing in recent years, it is possible to protect the natural environment by not using wood as a core material.

In the method of manufacturing a case component according to the present invention, an attachment portion for attaching another member is provided on the core material before the skin is laminated on the core material. When the core is formed in advance and combined with the outer mold of the skin type, it is preferable that the core material is fixed to the outer mold of the skin type by using the attachment portion.

Conventionally, even if an attachment portion is provided on a core material before laminating the skin, the core material may be compressed by a foaming agent and its shape and position may be slightly shifted. Then
This is not the case because the skin is directly laminated to the core material without using a foaming agent. Therefore, when manufacturing a case component by the manufacturing method of the present invention, an attachment portion or the like can be provided in advance before the skin is laminated on the core material.

Further, if the core is fixed to the outer mold using this mounting portion, the core can be fixed without damaging the core, such as by providing a fixing hole in the core. Furthermore, when manufacturing the core material with resin, if the filling space of the core material type for forming the core material is designed so that the mounting portion is formed in advance, the mounting portion is formed together when the core material is formed. Since the core material forming step and the mounting part forming step can be performed in one step, the manufacturing efficiency can be further improved.

Next, a case component manufactured by the method for manufacturing a case component according to any one of claims 1 to 3 has higher manufacturing efficiency and improved appearance quality as compared with a case component manufactured by a conventional manufacturing method. For example, it is superior to the conventional case parts in that it has an effect produced when manufacturing the case parts by the above-described manufacturing method.

[0013]

Embodiments of the present invention will be described below. Here, FIG. 1 is a side view of a keyboard lid of an upright piano, FIG. 2 is a process diagram of a music stand manufacturing process, and FIG. 3 is an explanatory view for explaining a state of manufacturing a music stand. ) Is a plan view of the skin type with the movable type removed,
(B) is an AA ′ sectional view of (a), and (c) is B of (a).
FIG. In FIG. 1, the music stand is shown in a sectional view.

As shown in FIG. 1, the keyboard cover 1 of the upright piano of the present embodiment includes a music stand 2 (corresponding to a case part of the present invention) on the back surface 1a of the keyboard cover 1. The music stand 2 is formed by a pair of hinges 5 on the back surface 1 a of the keyboard lid 1.
It is attached to open and close freely. And this music stand 2
Has a two-layer structure of the core material 20 and the skin 30. Specifically, the skin 30 is laminated on the surface of the core material 20 facing outward when the music stand 2 is closed.

As shown in FIG. 2, the music stand 2 is made through two steps of a core material making step S10 and a 'skin forming step S20. ('Is described in order to correspond to the conventional example.) In the core material forming step S10, a nylon resin (manufactured by Mitsui Chemicals, Inc.) is filled into a core material type filling space that imitates the core material 20 and solidified. Then, the work of taking out the core material 20 from the core material mold is performed. The filling space of the core material type includes a screw hole 22 (see FIG. 3A) for screwing the hinge 5 at a portion where the hinge 5 (see FIG. 1) of the molded core material 20 is attached, and a protrusion. A fixing hole 24 for fixing (see FIG. 3A) and a hinge escape hole 26 (see FIG. 3A) are depicted. In addition, what is processed as a waste material may be used as a nylon resin. The fixing hole 24 and the hinge escape hole 26 correspond to the mounting portion of the present invention.

In the skin forming step S20, an AS (acrylonitrile styrene) resin (manufactured by Asahi Kasei Corporation) is filled in a skin mold 2a modeled on the music stand 2 and solidified.
An operation of taking out the music stand 2 from a is performed. The skin mold 2a used in this operation includes, as shown in FIG. 3C, a movable mold 34 and an immobile mold 32 (corresponding to an outer mold of the present invention). Formed on the mating surface of the music stand 2 is a mold 32a. As shown in FIG. 3 (b), the movable mold 34 is provided with two pairs of escape extrusion pins 38 which are slidably mounted through the movable mold 34, and a core material When the core material 20 created in the creating step S10 is attached,
The fixing hole 24 and the hinge escape hole 26 are arranged and fitted so as to face the escape push-out pins 38, and the core 20 is moved to the movable mold 34.
Fixed to. Then, when the movable mold 34 and the immovable mold 32 are combined, the core material 2 is added to the mold 32a formed on the immovable mold 32.
0 is stored to form a filling space α that models the skin 30. The gate 36 attached to the movable mold 34
Is disposed at a position where the extraction port provided at the tip thereof is desired in the filling space α. Then, the AS resin is filled into the filling space α from the gate 36, and when the AS resin is solidified, the movable mold 34
Is separated from the stationary mold 32 and the music stand 2 is taken out from the stationary mold 32.

Then, a rubber piece is attached to the contact surface with the keyboard cover 1, and the music stand 2 is attached to the keyboard cover 1 using a hinge 5 (see FIG. 1).
Attach to As described above, in the present embodiment,
By using the core 20 as an inner mold, the core 20
Since the skin 30 is directly laminated on the surface, the two manufacturing steps of a skin preparation step and a lamination step, which were conventionally required because the skin 30 and the core material 20 were separately manufactured, can be performed in one manufacturing step. it can. Further, in the present embodiment, the skin 30 is directly laminated on the surface of the core material 20 without using a foaming agent, so that the skin 30 is not damaged as in the case of the conventional manufacturing method. Therefore, in this embodiment, the polishing step can be omitted. Therefore, when the music stand 2 is manufactured by the manufacturing method of the present embodiment, the number of steps is reduced by two steps, and the manufacturing efficiency can be drastically improved. Further, in the present embodiment, since the buffing is not performed, the gloss of the skin 30 before polishing is not lost, and the appearance quality is improved.

Next, in recent years, since the demand for nature protection has been increasing, the natural environment can be protected by using resin instead of wood as the material of the core material 20. Next, conventionally, even if the fixing hole 24 and the hinge escape hole 26 are provided in the core material 20 before the skin 30 is laminated, the core material 20 is compressed by the foaming agent, and its shape and position are slightly shifted. However, in the present embodiment, such a case does not occur because the skin 30 is directly laminated on the core material 20 without using a foaming agent. Therefore, when the music stand 2 is manufactured by the manufacturing method of the present embodiment, the fixing hole 24, the hinge relief hole 26, and the like can be provided in advance before the skin 30 is laminated on the core 20.
If the core material 20 is fixed using the fixing hole 24 and the hinge escape hole 26, the core material 20 can be connected to the keyboard without damaging the core material 20 by, for example, providing a fixing hole in the core material 20. It can be fixed to the lid 1. In this embodiment, when the core 20 is formed, the fixing hole 24 and the hinge escape hole 26 are formed.
6 (a so-called secondary processing) can be performed in one step, so that the manufacturing efficiency can be further improved.

Next, according to the manufacturing method of this embodiment, the skin 30 having an arbitrary thickness can be laminated by replacing the immovable mold 32 with a different size of the mold 32a. Further, since the color of the core material 20 can be freely changed by the coloring agent, the pattern can be variously changed to have the same color as the skin 30 or a different color. Furthermore, in the case of the music stand 2, the whole is AS
Manufacturing with resin is costly. However, according to the manufacturing method of the present embodiment, only the core 20 can be manufactured from a low-cost material, so that the cost can be reduced.

It should be noted that the embodiments of the present invention are not limited to the above-mentioned embodiments at all, and it goes without saying that various forms can be adopted as long as they fall within the technical scope of the present invention. For example, when manufacturing the wife base 6 as another case part, the wife base 4 is exposed as shown in FIG.
A surface 70 is laminated on the surface of the core member 60. Among them, the core material 60 is provided with a mounting hole 62 and a caster mounting hole 64 for mounting the base 6 to other case parts. The core member 60 may be immobilized using the holes 62 and 64, and may be manufactured in the same manner as the above-described manufacturing method. Further, in addition to the base 10, mounting holes are usually provided also in case of other case parts such as a brace, a shelf support post, etc., so that they are fixed to an immovable type using the mounting holes, and the core material is immobilized. Should be fixed to.

Next, a nylon resin is used as a material for the core members 20 and 60. For example, a polyolefin resin or the like may be used. Further, the material of the core material such as wood and plastic is not limited to nylon resin.

[Brief description of the drawings]

FIG. 1 is a side view of a keyboard lid of an upright piano to which a music stand manufactured by a manufacturing method according to an embodiment is attached.

FIG. 2 is a process chart of a manufacturing process of the embodiment.

FIGS. 3A and 3B are explanatory diagrams for explaining a manner of manufacturing a music stand by the manufacturing method of the embodiment, wherein FIG. 3A is a plan view of a skin type with a movable type removed, and FIG. A 'sectional view,
(C) is a BB ′ sectional view of (a).

FIG. 4 is a perspective view of a wife base.

FIG. 5 is an explanatory diagram for describing a conventional method for manufacturing a case component.

[Explanation of symbols]

2 music stand, 2a ... skin type, 5 ... hinge, 6 ... wife base, 2
0: core material, 24: fixing hole, 26: hinge escape hole, 30 ...
Outer skin, 32: immobile type, 32a: type, 34: movable type, 36
… Gate, 38… escape extrusion pin, 60… core material, 62… mounting hole, 64… caster mounting hole, 70… skin

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) G10C 3/02 G10C 3/02 F Z 9/00 9/00 // B29L 9:00 B29L 9:00 31 : 00 31:00 F term (reference) 4F202 AD05 AG03 CA01 CA11 CB01 CB11 CD02 CK43 CQ01 4F204 AD05 AG03 EA05 EB01 EB11 EF01 EF27 4F206 AD05 AG03 JA07 JB11 JF01 JL02 JM04 JN11 JQ81

Claims (4)

[Claims] 1. A method for manufacturing a case component in which a resin skin is laminated on the surface of a core material, wherein the core material is used as an inner mold of a skin mold for forming the skin, A resin is injected into a filling space that is modeled on the skin formed between the core material and the outer mold by combining the outer mold of the skin type, and the skin is directly laminated on the surface of the core material. A method of manufacturing a case component. 2. The method according to claim 1, wherein the core is made of a resin. 3. Before laminating the skin on the core material, a mounting portion for mounting another member is formed on the core material in advance, and when the core material and the outer mold of the skin type are combined, The method for manufacturing a case part according to claim 1, wherein the core member is fixed to the outer mold of the skin type using the attachment portion. 4. A case component manufactured by the method for manufacturing a case component according to claim 1.