JPH04214330A - Manufacture of transmitting resin product such as automobile, audio equipment and video deck - Google Patents

Abstract

PURPOSE:To manufacture a molded product not at all inferior to the product manufactured by the laser marker method and simplify the process, upgrade the workability and utilize materials effectively by making use of a manufacturing equipment of a transmitting resin nameplate and a transmitting panel heretofore available. CONSTITUTION:A thick screen printed section is formed on a transmitting resin name plate material through a heat-sensitive coating material cut into a size larger than the surface area of a resin molded product as a base. Then the back face of the printed section 6 of said cut transmitting resin nameplate 1 of given shape is loaded in a female mold A in the direction heading for a male mold B, and then resin E is force fed into the integrated mold, and the base and the nameplate are integrally molded.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is applicable to automobiles, audio,
The present invention relates to a method of manufacturing light-transmitting resin products such as video decks, and in particular, to a method of integrating a light-transmitting resin nameplate into a resin product having a curved outline. .

0002

[Prior Art] Conventionally, the method for manufacturing this type of light-transmitting resin product (hereinafter simply referred to as a "transmissive panel") is to paint various types of transparent panels, and then use a laser marker to write letters. As mentioned above, the method for performing the pattern cutting work is useful because it can be applied to various forms and the characters, etc., are clearly and accurately expressed.

[0003] However, this manufacturing method requires that when cutting out characters or designs using a laser marker,
This takes a considerable amount of time, resulting in extremely poor workability and, of course, having a negative impact on product costs.

[0004] Furthermore, when mass-producing the transmission panel, it is necessary to equip several laser machines, which poses problems in terms of equipment costs, installation space, and the like.

[0005] As an apparatus for molding a base molded resin article for a transmission panel, there is an injection molding and simultaneous painting apparatus disclosed in Japanese Utility Model Publication No. 63-21386. This idea uses an injection molding device that forms a cavity with a female mold and a male mold to inject hot air into a thermoplastic synthetic resin film and then injects molten resin to soften the thermoplastic synthetic resin film. , and the injection melted resin are integrated.

[0006] Indeed, by using this device,
This is a molding method that achieves integration of a thermoplastic synthetic resin film and a base molded resin product.

[0007]

[Problems to be Solved by the Invention] However, in the device of the above invention, since the thermoplastic synthetic resin film has a structure that protrudes from the outer periphery of the mold, it is necessary to cut around the molded product, which requires time and effort. However, the workability is extremely poor. Also, it would be a waste of materials. Possible issues include:

[0008] Furthermore, in this invention, since there is no painting on the back side of the thermoplastic synthetic resin film, great care or skill is required in terms of injection speed, temperature, injection direction, etc. First, the problem to be solved is different from the present invention.

Furthermore, this invention is a thermoplastic synthetic resin film and is not a translucent resin nameplate as the object of the present invention, and it is possible to integrate it with the base molded resin product through the softening of the thermoplastic synthetic resin film. The problem to be solved is different from the technical concept of the present invention, which aims to integrate the screen-printed part with the base molded resin product by melting it.

Furthermore, this invention has a structure in which a slightly thicker screen printed part is formed on the translucent resin nameplate, and the back side of this screen printed part is melted to integrate it with the base molded resin product. Nothing has been disclosed.

[0011]

[Means for Solving the Problems] Therefore, the present invention makes effective use of the equipment used in the production of conventional translucent resin nameplates and translucent panels to produce translucent resin nameplates and translucent panels produced by the laser marker method. The following configuration was adopted with the aim of producing a molded product that is comparable in any way to the panel used for the production of plastic parts.

That is, the present invention first includes a process of printing a translucent resin nameplate sheet by forming a slightly thick screen printed portion on a wrapped translucent resin nameplate material using a heat-sensitive paint; When cutting a single translucent resin nameplate from the translucent resin nameplate sheet produced in this printing process, a translucent resin nameplate with dimensions slightly larger than the surface area of the base molded resin product and a predetermined shape is cut. A process of cutting the translucent resin nameplate to be formed, and mounting the translucent resin nameplate of a predetermined shape produced in this cutting process in the female mold so that the back side of the screen-printed part faces toward the male mold. A step of attaching a translucent resin nameplate, a mold assembly step of assembling the male mold to the female mold to which the translucent resin nameplate is attached, and a step of attaching a translucent resin nameplate to the female mold in this way. The melted resin is press-fitted without the resin nameplate moving, and the base molded resin product is molded while melting a part of the back side of the screen printing part by the heat of the melted resin. and the translucent resin nameplate are integrated, and the contoured curved surface of this base molded resin product formed in this integrated molding process is shaped like the shape covered by the translucent resin nameplate. This method of manufacturing light-transmitting resin products for automobiles, audio equipment, video decks, etc. is comprised of a step of taking out the base molded resin product after the male mold is released from the molded light-transmitting resin product.

Another object of the present invention is that a curved light-transmitting panel can be manufactured easily and beautifully. In addition, in order to create a method for manufacturing a translucent panel in which the contoured curved surface of this base molded resin product is covered with a translucent resin nameplate, the following configuration was adopted.

That is, in the present invention, when cutting a single translucent resin nameplate from a shaped translucent resin nameplate sheet having a slightly thick screen-printed portion produced in a printing process,
This is a cutting process for a transparent resin nameplate that is slightly larger than the surface area of the base molded resin product and has a predetermined shape. Attach a translucent resin nameplate to the female mold so that the back side of the screen-printed part faces toward the male mold, and combine the male mold with the female mold with this translucent resin nameplate attached. At the same time, the molten resin is press-fitted into the combined mold without moving the translucent resin nameplate, and
Using the heat of the melted resin, a part of the back side of the screen printing section is melted to form a base molded resin product, and the formed base molded resin product is integrated with the translucent resin nameplate, After that, the integrally formed light-transmitting resin product, in which the curved contour of the base molded resin product is covered with a light-transmitting resin nameplate, is taken out after the male mold is released. This is a method of manufacturing light-transmitting resin products such as automobiles, audio equipment, video decks, etc., which are formed by taking out the product.

[0015]

[Operation] Next, the operation (manufacturing method) of the present invention will be explained.

First, a so-called translucent resin nameplate material made of wrapped polycarbonate, acrylic resin transparent plate, etc.
When a slightly thicker screen-printed area is formed using a heat-sensitive paint using a printing method such as screen printing, the printing process of the translucent resin nameplate sheet is completed.

[0017] Then, one translucent resin nameplate is cut from the translucent resin nameplate sheet produced in this printing process, but in this case, the size is at least slightly larger than the surface area of the base molded resin product. Then, a translucent resin nameplate having a predetermined shape is formed. In this way, the translucent resin nameplate with a predetermined shape produced in the cutting process is mounted inside the female mold with the back side of the screen-printed part facing toward the male mold. Insert the small hole of the translucent resin nameplate into the locking protrusion provided in the recess of the female mold (in this example, this locking protrusion corresponds to the window or small hole of the translucent panel. The same applies hereinafter). The translucent resin nameplate is mounted inside the female mold, and the outer circumferential portion of the translucent resin nameplate is attached to the rising circumferential wall portion of the recess of the female mold.

[0018] Subsequently, as described above, the male mold having the convex portion is combined with the female mold to which the translucent resin nameplate is attached, thereby forming a combined mold, and this combined mold. A cavity for filling with molten resin is formed between the mold and the transparent resin nameplate.

Melted resin is press-fitted into the cavity formed by this combined mold. At this time, since the translucent resin nameplate is securely locked to the locking protrusion, it does not move and remains stationary even when the molten resin is press-fitted, and the molten resin are successively press-fitted from below.

Further, by press-fitting the molten resin and heat of the molten resin, a part of the back side of the screen printing section is melted to form a base molded resin product, and the formed base resin product is
The base molded resin product and the translucent resin nameplate are integrated.

During this integral molding process, when the male mold is removed, the light-transmitting resin product has a shape in which the contoured curved surface of the base molded resin product is covered with a light-transmitting resin nameplate.
Since it is supported within the female mold, the molded light-transmitting resin product (light-transmitting panel) is removed.

[0022] Through the above-described operations, a base molded resin article is constructed.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an explanation will be given with reference to the drawings showing an example of the present invention. First, heat-sensitive paint is applied to a so-called translucent resin nameplate material (not shown) made of wrapped polycarbonate, acrylic resin transparent plate, etc., using a printing method such as screen printing to form a slightly thicker screen. When forming the part,
At this point, the printing process of the translucent resin nameplate sheet (not shown) is completed.

[0024] Next, from the translucent resin nameplate sheets produced in this printing process, one translucent resin nameplate 1 was produced.
However, in this case, the size is at least slightly larger than the surface area of the base molded resin product described later, and it has a predetermined shape, and the back side 1a has white 2 or red 3 and letters 4
Alternatively, the translucent resin nameplate 1 is provided with a screen-printed part 6 made of non-translucent black ground 5 or the like. In this way, the translucent resin nameplate 1 of a predetermined shape manufactured in the cutting process is installed in the female mold A so that the back side 6a of the screen-printed part 6 faces toward the male mold, which will be described later. However, specifically, the locking protrusion A1 provided in the recess A1 of the female mold A
1 (In this example, this locking protrusion corresponds to the window or small hole of the translucent panel. The same applies hereinafter. Also, this locking protrusion A11
is an example, and the present invention is not limited to this example. )
The small hole 1b of the translucent resin nameplate 1 is inserted into the hole 1b, and the translucent resin nameplate 1 is mounted inside the female mold A, and the outer peripheral part 1c of the translucent resin nameplate 1 is inserted into the female mold A. It is attached so as to be attached to the rising peripheral wall portion A111 of the concave portion A1 of A.

Subsequently, as described above, the male mold B having the convex portion B1 is attached to the female mold A to which the translucent resin nameplate 1 is attached.
are combined to form a combined mold C (see FIG. 7), and a cavity D for filling with molten resin is formed between this combined mold C and the transparent resin nameplate 1. Ru.

A molten resin (molten resin) E is press-fitted into the cavity D of this combined mold C. At this time, since the translucent resin nameplate 1 is securely locked to the locking protrusion A11, it does not move and remains stationary even when the molten resin E is press-fitted. Then, the melted resin E is sequentially press-fitted from below (the lower side is shown in FIG. 6, but it is possible to do so from the back side 6a of the screen printing section 6 as shown in FIGS. 2 to 4, For example, without limitation).

Furthermore, due to the press-fitting of the molten resin E and the heat of the molten resin E, the back side 6a of the screen printing section 6 is
A base molded resin product 7 is molded while melting a part of 6b,
This formed base molded resin article 7 and the translucent resin nameplate 1 are integrated (see FIGS. 2 to 4).

During this integral molding process, when the male mold B is removed, a light-transmitting resin product is formed in which the contour curved surface 7a of the base molded resin product 7 is covered with the light-transmitting resin nameplate 1. 8 is supported within the female mold A, so the molded light-transmitting resin product (light-transmitting panel) 8 is taken out.

The light-transmitting resin product 8 is successively constructed through the above-described operations.

[0030] The molds are so-called female mold A, male mold B,
It goes without saying that the injection form of the molten resin E, the color and form of the screen printing section 6, etc. are merely examples and are not limited to these examples.

[0031]

[Effects of the Invention] As explained above, there is a printing process for a translucent resin nameplate sheet in which a slightly thick screen printing part is formed on a wrapped translucent resin nameplate material through a heat-sensitive paint; When cutting a single translucent resin nameplate sheet produced through this printing process, a translucent resin nameplate with dimensions slightly larger than the surface area of the base molded resin product and a predetermined shape is cut. A process of cutting the translucent resin nameplate to be formed, and mounting the translucent resin nameplate of a predetermined shape produced in this cutting process in the female mold so that the back side of the screen-printed part faces toward the male mold. A step of attaching a translucent resin nameplate, a mold assembly step of combining the male mold with the female mold to which the translucent resin nameplate is attached, and a step of attaching the translucent resin nameplate to the female mold. The molten resin is press-fitted without moving the nameplate, and the heat of the molten resin melts a part of the back side of the screen printing part to form a base molded resin product, and the formed base molded resin product and An integral molding process to integrate with the translucent resin nameplate, and a light molding process in which the contoured curved surface of the base molded resin product formed in this integral molding process is covered with the translucent resin nameplate. This is a method for manufacturing light-transmitting resin products such as automobiles, audio equipment, video decks, etc., which includes a step of taking out the base molded resin product after releasing the transparent resin product from the male mold.

[0032] Therefore, it has the following effects.

That is, firstly, the present invention makes effective use of the equipment used in the production of conventional translucent resin nameplates and translucent panels to produce translucent panels and translucent panels produced by the laser marker method. , it is possible to produce molded products with no inferiority.

Second, according to the present invention, a curved light-transmitting panel can be manufactured easily and beautifully. In addition, there is a practical effect in that a light-transmitting panel can be produced in which the contoured curved surface of this base molded resin product is covered with a light-transmitting resin nameplate.

Third, since the present invention does not use adhesives or release paper, it simplifies the process, improves workability,
In addition, effective use of materials and cost reduction can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a translucent resin nameplate.

FIG. 2 is an enlarged explanatory diagram showing the first step of the manufacturing procedure.

FIG. 3 is an enlarged explanatory diagram showing the second step of the manufacturing procedure.

FIG. 4 is an enlarged explanatory diagram showing the third step of the manufacturing procedure.

FIG. 5 is a sectional view of a translucent panel.

FIG. 6 is an enlarged sectional view of the main part of FIG. 5;

FIG. 7 is an enlarged sectional view showing an example of a combined mold.

FIG. 8 is a perspective view showing an example of a female mold used in the present invention.

[Explanation of symbols]

1 Translucent resin nameplate 1a Back side 1b Small hole 2 White 3 Red 4 Characters 5 Black 6 Screen printing department 6a　Back side 7 Base molded resin product 7a　Contour shape curved surface 8. Light-transmitting resin products A Female type B Male type C Combined mold E Melted resin

Claims (1)

[Claims] Claim 1: ■ A step of printing a translucent resin nameplate sheet in which a slightly thick screen-printed portion is formed on a wrapped translucent resin nameplate material through a heat-sensitive paint, and ■ The printing step includes: When cutting a single transparent resin nameplate from the manufactured transparent resin nameplate sheet, a transparent resin nameplate with dimensions slightly larger than the surface area of the base molded resin product and a predetermined shape is formed. (1) A transparent resin nameplate cutting process in which the transparent resin nameplate with a predetermined shape produced in the cutting process is mounted in the female mold so that the back side of the screen-printed part faces toward the male mold. (1) a mold combining step of combining the male mold with the female mold to which the transparent resin nameplate is attached; (2) the transparent resin nameplate is moved into the combined mold; At the same time, the melted resin is press-fitted without any heat, and the heat of the melted resin melts a part of the back side of the screen printing part to form a base molded resin product, and the formed base molded resin product and the translucent An integral molding process that aims to integrate with the resin nameplate, ■ A light-transmitting resin product in which the contoured curved surface of this base molded resin product formed in the integral molding process is covered with a transparent resin nameplate. of,
A method for manufacturing light-transmitting resin products such as automobiles, audio equipment, video decks, etc., comprising a step of taking out a base molded resin product after releasing the male mold.