JP3097548B2 - Cassette half molding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cassette in which a disk-shaped recording medium is accommodated in a cassette housing having an upper half and a lower half.

More specifically, the present invention relates to a disk cassette provided with a functional member made of either a photocatalyst or an antibacterial member in a cassette housing.

[0003]

2. Description of the Related Art In general, when an antibacterial function is given to a molded product such as a housing of a remote controller, a push button switch, a keyboard input means, etc., a compound (powder) is mixed with powder particles of an antibacterial material during injection molding, A method of covering with a sheet is performed.

As information recording media in audio / video-related equipment or computer-related equipment, a cassette housing composed of an upper half (also referred to as an upper shell) and a lower half (also referred to as a lower shell) is provided. Disk cassettes each having a disk-shaped recording medium accommodated in a storage medium are often used.

The disk-shaped recording medium accommodated in the cassette housing includes, for example, an FD (floppy disk), an optical disk (CD (compact disk), and a CD).
-Any one of ROM (Read Only Memory), DVD (Digital Video Disk), MO (Rewritable Magneto-Optical Disk), PD (Rewritable Phase Change Disk), etc.

[0006]

However, when an antibacterial member is mixed into a compound during injection molding to form a cassette half, the proportion of the antibacterial member exposed on the surface of the cassette half is small and the antibacterial effect is small. In addition, the amount mixed into the compound increases.

In the case of covering with an antibacterial sheet, the structure of the molding machine becomes complicated. Further, if the cassette half has complicated irregularities in its outer shape, the sheets cannot be sufficiently adhered to each other, and the sheets will be wrinkled.

A disk cassette in which a disk-shaped recording medium is accommodated in a cassette housing composed of an upper half and a lower half and at least a part of the surface of the cassette half is provided with either a photocatalyst or an antibacterial member is provided. Not proposed.

It is an object of the present invention to provide a disk cassette provided with a photocatalyst on at least a part of a surface of a cassette half constituting a housing.

It is another object of the present invention to easily provide a functional member, either a photocatalyst or an antibacterial member, in a process of forming a cassette half.

It is another object of the present invention to efficiently exhibit the antibacterial action of the functional member and the action of decomposing contaminants such as nitrogen oxides, and to reduce the amount of the functional member used.
Also, without bonding the sheet substrate to the surface of the molded product,
An object of the present invention is to stabilize a molding process, shorten a molding cycle, and to arbitrarily shape a molded product.

[0012]

In order to solve the above-mentioned problems, in a disk cassette according to the present invention, a functional member comprising one of a photocatalyst and an antibacterial member is provided on at least a part of a cassette housing. The configuration is as follows.

The first means for arranging the functional member on the cassette half is a method of coating or printing by attaching the functional member to an adhesive member (carrier).

Further, as another means, in a process of molding the cassette half, for example, in an injection molding process or a blow molding process, a functional member is applied or embedded on at least a part of the surface of the cassette half.

In the above structure of the present invention, the adhesive member containing the functional member may be a thermosetting acrylic resin member (for example, acrylic melamine resin), an alkyd melamine resin member, a vinyl acetate-based material, or a fluororesin-based material. Or an organic binder such as a silicone resin type, an epoxy resin type, or a UV resin (ultraviolet curable resin), a water-soluble resin member such as poval (polyvinyl alcohol / PVA), a rubber member (eg, natural rubber, butyl rubber, etc.), Any one of arbitrary members such as vinyl chloride and phenol resin is used.

The coating thickness of the adhesive including the functional member is 1
It is about μm to 30 μm. The form of the antibacterial member contained in the adhesive member is any one of a powder particle form and a liquid form.

Further, the outer dimensions of the antibacterial member in the form of powder particles are about 0.05 μm to about 100 μm. The amount added is about 0.5% to 10% by weight. By attaching and fixing the antibacterial member to the surface of the molded article or the like, the living environment of bacteria adhered to the molded article is cut off.

The antibacterial member is made of any one of zeolite (antibacterial metal ion / silver, copper, zinc), chitosan, mugwort, hinoki (hinokitiol), and hiba.

Zeolite is an antibacterial ceramic containing a bactericidal substance such as silver, copper or zinc.

[0020] Chitosan is a natural polysaccharide that is often contained in crab shells and shrimp shells and has antibacterial and antifungal properties. A ratio of about 0.3% to about several% by weight is sufficient for embedding as a powder particle on the surface of a molded article, mixing into an adhesive member, or mixing into a solution or water, and a fine particle having a particle size of about 5 μm or less is sufficient. Powder.

The mugwort has a tannin contained in the mugwort which has an antiallergic and antipruritic effect, a chlorophyll (chlorophyll) has a disinfecting and bacteriostatic effect, and the particle size of the mugwort containing an extract of mugwort is about 0.05 μm or more. It may be embedded or applied as a microcapsule of about 20 μm and fixed to the surface of the object.

Cypress plays a role of a preservative to prevent tropilone contained in the cypress from attracting bacteria, mold, etc., and may be used as microcapsules having a particle size of several micrometers as in other antibacterial members.

As the liquid antimicrobial member, hinoki or hiba essential oil (essential oil) or metronidazole, or else, silver acetate or silver nitrate is dissolved in pure water, and K ↓ 2SO ↓ 3 and K ↓ 2S ↓ are added to the solution. 2O ↓ 3 is sequentially added to obtain a solution containing at least one of a silver thiosulfato complex salt and a silver salt.

An antibacterial complex in which at least one of a silver thiosulfato complex salt or a silver salt is supported and adsorbed on hydrated amorphous silicon dioxide, and an outer shell coating layer is further formed on the outer surface thereof, or an organic arsenic compound Vinazine and the like may be mixed at a weight ratio of about 0.5% to about 10%.

In addition to the above, as an antibacterial member, iodoform, silver silica gel antibacterial agent particles, diphenyl ether type or silicon quaternary ammonium salt (trade name AC)
P-20, TK-520), a mixture of zirconium phosphate and silver oxide, a compound containing isothiocyanate as an antibacterial component and inclusion in cyclodextrin, or the like may be used arbitrarily.

Any member may be used as the photocatalyst.
For example, fine powder particles of a photocatalyst made of titanium dioxide or a mixture of titanium dioxide and activated carbon are used.

By disposing the photocatalyst powder particles or the thin film of the adhesive containing the photocatalyst on the surface of the object, the surface can be prevented from being stained, bacteria on the surface can be killed, and the smell attached thereto can be removed.

That is, 300 nm to 40
The photocatalyst which has received near-ultraviolet light of 0 nm is activated and oxidizes and decomposes organic substances (acetaldehyde, ammonia, etc.), nitrogen oxides, chlorine compounds and the like.

The fine powder particles of the photocatalyst, such as titanium dioxide or a mixture of titanium dioxide and activated carbon, have an outer shape of 0.01 μm to 100 μm.

The ratio of the adhesive contained in the adhesive may be about 0.1% to 30% by weight. The coating thickness may be arbitrarily determined according to the purpose of use. For example, it may be applied to a thickness of several micrometers to 100 micrometers. In case of screen printing or gravure printing,
A range of several microns to 20 microns is suitable.

The structure of the photocatalyst is described in, for example,
No. 5853 has been proposed. Here, a highly active photocatalyst is formed by bringing a catalyst carrying a reducing catalytically active component and a photocatalyst carrying an oxidizing catalytically active component into contact with each other, and further contacting a water-repellent substance with one of them. are doing.

As a specific example, a component having catalytic activity for the reduction reaction of carbon dioxide such as copper and mercury is supported on a conductive carrier such as carbon black. In addition, a component such as silver or platinum having a catalytic activity for oxidizing water is supported on a semiconductor such as titanium dioxide. Then, the two are brought into contact with each other, but recombination of charges is prevented because the active sites are separated. Also, because the water-repellent substance is brought into contact with any of them,
The catalyst floats and is present in the aqueous solution surface layer to obtain a highly active photocatalyst.

The alkoxide compound of titanium is dissolved in an equimolar amount of ethanol or the like, and hydrolyzed by adding hydrochloric acid or the like. The obtained titanium compound can be formed into any shape without a binder.

The titanium dioxide is preferably an anatase type, but may be a rutile type titanium dioxide metallized with copper, silver, platinum or other metals.

In addition, WO ↓ 2, Cds, SrTiO ↓
2. A photocatalyst may be formed of a semiconductor such as MoS ↓ 2.

According to the present invention, a functional member such as a photocatalyst or an antibacterial member can be easily provided on the surface of the cassette half.

In the injection molding or blow molding process,
A functional member can be provided on the surface of the cassette half simultaneously with molding. Further, the amount of the functional member used can be reduced.

Therefore, the work of arranging the functional member after the molding becomes unnecessary. As a result, the process can be simplified and the cost can be reduced.

Further, since the sheet base material is not adhered to the surface of the molded product and no wrinkles are generated, the molding process can be stabilized, the molding cycle can be shortened, and the shape of the molded product can be made arbitrary. Further, the characteristics of the resin member used for injection molding or blow molding are not changed. For example, without changing the molding characteristics of the resin member, an arbitrary structure or a curved surface shape can be configured according to the variety of designs and the purpose of use.

The antibacterial member prevents the growth of mold and bacteria, and the photocatalyst decomposes pollutants adhering to the atmosphere or to the surface of the molded article. This enables a healthy and comfortable life even if an unspecified number of people share the disk cassette.

[0041]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention comprises a cassette housing comprising an upper half and a lower half, and a disk-shaped recording medium housed in the cassette housing, respectively. The cassette housing is provided with one of a photocatalyst and an antibacterial member.The antibacterial member prevents the growth of bacteria attached to the surface, and the photocatalyst is activated by near ultraviolet light. It has the effect of oxidizing and decomposing contaminants such as organic substances (acetaldehyde, ammonia, etc.), nitrogen oxides, chlorine compounds and the like.

According to a second aspect of the present invention, there is provided a cassette housing comprising an upper half and a lower half, and a disk-shaped recording medium accommodated in the cassette housing. A disk cassette comprising an adhesive member including one of the members.An antimicrobial member prevents the growth of bacteria attached to the surface, and a photocatalyst oxidizes contaminants such as organic substances. Has the effect of decomposing.

According to a third aspect of the present invention, the adhesive is made of acrylic, vinyl acetate, fluorine resin, silicone resin, epoxy resin, urethane resin, polyester resin, phenol resin, or polyvinyl chloride. 3. The disk cassette according to claim 2, wherein the antibacterial member prevents the growth of bacteria attached to the surface, and the photocatalyst oxidizes and decomposes contaminants such as organic substances. It has the effect of doing.

According to a fourth aspect of the present invention, there is provided a disk cassette wherein at least one of a photocatalyst and an antibacterial member is embedded in at least a part of the surface of the cassette housing. The photocatalyst has the effect of oxidizing and decomposing contaminants, such as organic matter, to prevent the growth of bacteria attached to the water.

According to a fifth aspect of the present invention, there is provided a mold having a movable portion capable of freely moving back and forth in at least a part of the cavity, supplying a molding material to the cavity, and thereafter,
The movable portion is retracted to provide a gap, and in this gap,
By supplying a gas containing either one of the photocatalyst and the antibacterial member, one of the photocatalyst and the antibacterial member is disposed in at least a part of the surface of the cassette half. This is a method for forming a cassette half, and has an effect that a functional member can be disposed on the surface of the cassette half in a forming process.

According to a sixth aspect of the present invention, there is provided the method of forming a cassette half according to the fifth aspect, wherein the gas contains an adhesive. It has the effect that it can be arranged on the surface.

According to a seventh aspect of the present invention, a pair of molds including a movable mold and a fixed mold is prepared, a molding material is supplied to the cavity of the mold, and then the movable mold is retracted. By providing a gap portion and supplying a gas containing either the photocatalyst or the antibacterial member to the gap portion, any one of the photocatalyst and the antibacterial member is disposed on the surface of the cassette half. This is a method for forming a cassette half, and has an effect that a functional member can be disposed on the surface of the cassette half in a forming process.

According to an eighth aspect of the present invention, a pair of molds including a movable mold and a fixed mold are prepared, a molding material is supplied to a cavity of the mold, and then the movable mold is retracted. A gap is formed, and one of the photocatalyst and the antibacterial member is supplied to the gap, and further, by moving the movable mold forward, one of the photocatalyst or the antibacterial member is pressed, and the cassette is pressed. This is a method for molding a cassette half, which is embedded near the surface of the half, and has an effect that a functional member can be arranged on the surface of the cassette half in the molding process.

According to a ninth aspect of the present invention, in the blow molding method in which the extruded parison is clamped by a mold and a pressurized gas is blown into the parison, the mold is formed by clamping the parison with the mold. Between the outer periphery of the parison,
A blower for a cassette half, wherein one of the photocatalyst and the antibacterial member is disposed on the outer peripheral surface of the parison by introducing a pressurized gas containing either the photocatalyst or the antibacterial member. This is a molding method, and has an effect that the functional member can be disposed on the surface of the cassette half in the molding process.

According to a tenth aspect of the present invention, there is provided a blow molding method in which an extruded parison is sandwiched by a mold and a pressurized gas is blown into the parison. Blow-molding a cassette half, wherein one of the photocatalyst and the antibacterial member is disposed on the inner peripheral surface of the parison by introducing a pressurized gas containing one of the photocatalyst and the antibacterial member. The method has a function that the functional member can be disposed on the surface of the cassette half in the molding process.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. (Embodiment 1) FIG. 1 is a perspective view of a disk cassette according to Embodiment 1 of the present invention. As shown in FIG. 1, the disc cassette 1 of the present invention has an upper half 3 and a lower half 4.
And a disc-shaped information recording medium 2 housed in the cassette housing 8.

A recess provided at one end of the upper half 3 has an opening 5, and a shutter 6 for opening and closing the opening 5 is slidably mounted. The shutter 6 is formed by forming a metal member or a resin member in a substantially U-shape, and is set in an open state shown in FIG. 1 by being loaded into a floppy disk driver or an optical disk driver (neither is shown).
A magnetic head or an optical head (not shown) is accessed through the opening 5 to record and reproduce information.

Further, in the disk cassette 1 of the present invention, a functional member 7 of one of a photocatalyst and an antibacterial member is provided on the entire surface of the upper half 3 and the lower half 4 or a partial region of the surface. Configuration. FIG.
In the case of the outer surface of each half, that is, the main plane and each end surface, etc.
The functional member 7 is arranged at a part that may be touched by a hand. Of course, it is needless to say that the functional member may be provided on the shutter surface or the inner surface of each half.

The disc-shaped information recording medium accommodated in the cassette housing includes, for example, an FD (floppy disc), an optical disc (CD (compact disc),
One of a CD-ROM (read only memory), a DVD (digital video disk), an MO (rewritable magneto-optical disk), a PD (rewritable phase change disk), and the like.

The members forming the upper half 3 and the lower half 4 may be made of any light transmitting member such as acrylic, polycarbonate, vinyl chloride, urea resin and the like.
Of course, other opaque resin members such as ABS, P
P, PS, epoxy, etc. may be arbitrarily implemented.

The first means for providing either the photocatalyst or the antibacterial member on the outer surface of the upper half 3 or the lower half 4 is to apply or print an adhesive member containing either the photocatalyst or the antibacterial member. Configuration.

As the adhesive member containing either the photocatalyst or the antibacterial member, a thermosetting acrylic resin member (for example, acrylic melamine resin), an alkyd melamine resin member, a vinyl acetate resin, a fluorine resin resin, or One of a synthetic resin member (or an organic binder) of a silicone resin type, a urethane resin type, a polyester resin type, a phenol resin type, a polyvinyl chloride type or the like.

The coating thickness of the adhesive member including either the photocatalyst or the antibacterial member is set to a minimum of about 0.1 μm to 30 μm.

The mixing ratio of either the photocatalyst or the antibacterial member to be mixed in the adhesive member is in the range of 0.1 W% to 30 W%.

It should be noted that an epoxy resin-based adhesive member may be used in addition to the above-mentioned adhesive member. In this case, after dispersing the functional member in the adhesive member containing the epoxy resin, the functional member is applied or printed on the surface of the half. Then, after primary drying at 30 to 50 degrees Celsius and evaporating the thinner, 80 to 20 degrees Celsius.
It is subjected to secondary drying at 0 degrees to form a functional member layer.

As a coating method, it goes without saying that any means such as dip coating, spray coating, electrostatic coating or powder coating may be used. In the case of printing, it may be arbitrarily performed such as screen printing, gravure printing, and tampo printing.

Further, it goes without saying that an organic adhesive member, a water-soluble adhesive member, a UV resin, or the like other than those described above may be used.

Next, a description will be given of a second means in which either the photocatalyst or the antibacterial member is provided on the outer surface side of the half with a functional member.

FIG. 6 is a sectional view of a principal part showing the concept of an injection molding apparatus. In the course of injection molding, a functional member is applied or embedded on the surface of a molded product (cassette half). Note that the molded product does not show the correct cross-sectional shape of the cassette half. 1 shows a generally concave bottomed container.

In FIG. 6, the fixed mold 122 and the movable mold 12
After injecting the resin forming the cassette half into the cavities of the pair of molds composed of the mold 3, the movable mold 123 is retracted by a small amount (several tens μm to several hundred μm) to the position indicated by the two-dot chain line,
A space (not shown) is provided on the side constituting the outer surface of the cassette half. The functional member injection device 41E is inserted into this gap.
By injecting a gas containing a more functional member, one of the photocatalyst and the antibacterial member is formed on the outer surface of the cassette half.

The particle diameter of the powder of either the photocatalyst or the antibacterial member contained in the gas is in the range of 0.01 μm to 100 μm.

The timing of injecting a gas containing a functional member into the inner surface of the gap is arbitrarily set. For example, when a gas containing powder particles of a functional member is injected, the injection is performed before the resin in the mold cavity is cooled and solidified.

Of course, a gas containing a functional member may be injected after the resin is cooled and solidified. In this case, a binder, an adhesive resin, a diluting solvent, or the like may be included in the gas so that the functional member does not peel off from the adhesion surface.

When the high-pressure gas containing the functional member does not contain the binder, the adhesive resin, or the diluting solvent, after the injection, the retreated mold is advanced again to press the application surface of the functional member. Alternatively, the functional member may be embedded on the surface of the half or near the surface.

Further, the nozzle for injecting the functional member is not limited to one location, but may be arbitrarily provided at a plurality of locations. As the solvent, any solvent such as alcohol, toluene, thinner, and acetone is used. As the adhesive member, epoxy resin, acrylic resin, vinyl chloride resin, ABS resin, P
A predetermined amount of an arbitrary resin member such as an S resin, a polyamide resin, a polycarbonate resin, and a styrene resin may be included.

Further, the injection moldable member constituting the molded product (cassette half) may be arbitrarily implemented in addition to the above. For example, a resin member such as PE or PET may be used.

Of course, a biodegradable plastic may be used. For example, a denatured protein material such as gluten, a material obtained by kneading paper and denatured protein, a material obtained by kneading potato starch with water, a natural polymer Novamont (trade name: Materby /
Nippon Synthetic Chemical Industry), Microorganism-producing polyester ICI
(Product name Biopole / Ishi I Japan),
Chemically synthesized aliphatic polyester (Bionore /
It may be used arbitrarily, such as Showa Kobunshi).

According to the present invention, the characteristics of the resin member used for injection molding are not changed by the above configuration. For example,
An arbitrary structure or a curved surface shape can be configured according to the variety of designs and the purpose of use without changing the molding characteristics of the resin member. Further, the quality of the molded product does not deteriorate.

Furthermore, either the photocatalyst or the antibacterial member can be formed in the process of injection molding, eliminating the need for arranging a functional member after molding. Therefore, the process can be simplified and the cost can be reduced.

FIGS. 7 and 8 show a third means for providing a functional member on the outer surface of a molded product (half constituting a cassette housing). The blow molding apparatus shows a concept of a method of applying or embedding a functional member on the surface of a cassette half in a molding process. 7 and 8, the molded product does not show the cross-sectional shape of the cassette half. For convenience, a generally convex bottomed container is shown.

More specifically, a plasticized parison is supplied into a mold, and then a pressure fluid containing a functional member is introduced between the outer peripheral surface of the parison and the mold cavity to form a molded product (cassette half). A functional member (either a photocatalyst or an antibacterial member) is applied to the outer peripheral surface of the molded article during the process of forming
And a blow molding method for forming a coating layer.

For example, a high-pressure gas (high-pressure gas) made of compressed air or the like of 8 kg / cm ² or less has an outer dimension of 0.01 kg.
It is supplied in a form in which a functional member in the form of powder particles having a micrometer to 100 micrometers is mixed.

The timing of supplying the functional member to the blow molding material (parison) is arbitrarily determined. For example, when supplying a high-pressure gas containing a powdery particulate functional member, the process is performed before the resin in the mold cavity is cooled and solidified.

Of course, after the cassette half is formed, a high-pressure gas containing a functional member may be continuously supplied before the cassette half is cooled and solidified.

Alternatively, a pressurized gas may be supplied into the parison in advance, and then a high-pressure gas containing a functional member may be introduced between the outer peripheral surface of the parison and the mold cavity.

Alternatively, a high-pressure gas containing a functional member may be introduced between the outer peripheral surface of the parison and the mold cavity, and thereafter, a pressurized gas may be introduced into the parison for molding. Of course, pressurized gas may be simultaneously supplied to the inside of the parison and the outside of the parison.

In any of the above cases, it is desirable to supply the pressure fluid containing the functional member while the blow molding material (parison) has an adhesive force and has the ability to adhere the functional member.

After the cassette half is cooled and solidified, a high-pressure gas containing a functional member may be injected.

Further, the high-pressure gas may contain a binder such as PVA (polyvinyl alcohol), an acrylic resin, a polyurethane resin, an adhesive resin, a diluting solvent, or the like so that the functional member does not peel off from the adhered surface. That is, it is needless to say that any solvent such as alcohol, toluene, thinner, and acetone may be mixed. Epoxy resin, acrylic resin, vinyl chloride resin, ABS resin, PS resin, polyamide resin, polycarbonate resin, styrene resin A predetermined amount of an arbitrary resin member such as a resin or a thermoplastic resin such as a polybutylene terephthalate resin may be included.

As the pressure fluid, any gas such as nitrogen gas or inert gas (eg, argon gas) may be used in addition to compressed air.

As described above, also in the blow molding, the coating layer of the functional member can be formed in the molding process, and the operation of forming the coating layer in a separate step is not required. Therefore, the process can be simplified and the cost can be reduced.

Next, the blow molding apparatus and the molding process will be described. FIG. 7 shows a conceptual diagram of a main part configuration of the blow molding apparatus. The screw cylinder 206 is provided with a heating means and a hopper (not shown), and the thermoplastic resin member 210 supplied from the hopper is heated by the screw cylinder 206. Plunger 2 of accumulator 204 while melting
Sent to 40.

Below the accumulator 204, a pair of split molds 201, 201 which are provided with a predetermined concave portion (cavity) and are openable and closable, are provided. The molten resin member 210 extruded by the plunger 240 is molded as a cylindrical parison 211 by a die 205 provided at the lower end of the accumulator 204 while the mold 20 is being molded.
1 and 201 are extruded.

When the parison 211 is pushed out to a predetermined length, the driving of the plunger 240 is stopped, and the blow pin 202 is inserted into the inner periphery of the parison 211 which can be clamped by the dies 201, 201. The blow pin 202 communicates with a pressurized air source 203 via a valve or the like (not shown) to supply only pressurized air.

The supply pipe 231 is formed by a pipe penetrating the molds 201 and 201 and communicating with the pump 30 for supplying a high-pressure gas containing the functional member alone or the functional member. Here, when the molds 201, 201 are closed (mold closed) by driving means (not shown), the upper part of the parison 211 is sandwiched between the molds 201, 201, while the lower part is inward, as shown in FIG. The blow pin 202 is sandwiched between the dies 201, 201 with the blow pin 202 protruding around the circumference.

Thereafter, a valve (not shown) is opened and a high-pressure gas containing either a photocatalyst or an antibacterial member 207 alone or a high-pressure gas containing a functional member 207 and a binder is supplied from a supply pipe 231 to a parison. It is supplied to the gap (cavity) between the outer peripheral surface of the 211 and the mold, so that the functional member fills the cavity and adheres to the surface of the parison 211.

Next, pressurized air is supplied from the blow pin 202 to the inner peripheral side of the parison 211, and the parison is expanded along the cavity shape of the mold so as to be closely adhered thereto, and is molded.

According to these processes, one of the photocatalyst and the antibacterial member is buried in the surface of the molded product at a predetermined rate, or is disposed so as to form a coating layer with a predetermined thickness.

Therefore, the functional member can be fixed to the surface of the molded article in the process of blow molding. In the case where the functional member is disposed in the inner layer portion of the molded product by the blow molding method, in FIG. 7, a pressure gas including the functional member is introduced into the parison in the process of clamping the parison with the mold. Thereby, a functional member may be embedded or applied to the inner peripheral surface of the parison.

(Embodiment 2) FIG. 2 is a plan view of a disk cassette 10 according to Embodiment 2 of the present invention, and shows, for example, the concept of an optical disk.

Also in this case, the cassette housing 23 includes an upper half 24 and a lower half (not shown), and the disk-shaped information recording medium 22 housed in the cassette housing 23.

A shutter area 27 (recess) provided at one end of the upper half 24 is provided with an opening 25, and a shutter 26 for opening and closing the opening 25 is slidably mounted. The shutter 26 is formed by forming a metal member or a resin member into a substantially U-shape, and an optical disk driver (not shown)
Is set to the open state. An optical head (not shown) is accessed through the opening 25 to record and reproduce information.

Further, the disk cassette 10 is provided with a functional member 28 on a part of the surface of the upper half 24 and the entire outer surface of the lower half.

In the case of FIG. 2, a functional member 28 is arranged on the main surface of the upper half 24 in a ring shape excluding a region corresponding to the disk-shaped information recording medium 22. This is information recording medium 2
No. 2 can be observed. In addition, upper half 2
4 has a functional member 28 disposed on each end face. The lower half is provided with functional members on all outer surfaces.

The application pattern of the functional member 28 to the cassette housing 23 may be arbitrarily set, for example, limited to a part that can be touched by hand. Further, it goes without saying that a functional member may be provided on the shutter surface or the inner surface of each half.

As a first means for providing a functional member in each half, an adhesive member including a functional member (either a photocatalyst or an antibacterial member) is applied to the surface.

The functional member, the adhesive member including the functional member, the method of applying the adhesive member, and the like have been described in detail in the first embodiment, and thus will not be described.

Further, as a second means for providing a functional member on the outer surface of each half, as shown in FIG. 6, powder particles of either the photocatalyst or the antibacterial member are applied to the surface of the molded article during the injection molding process. The method of applying or embedding is used. The molding is also described in detail in the first embodiment, and a description thereof will be omitted.

The member constituting the half is made of an arbitrary light transmitting member such as acrylic, polycarbonate, vinyl chloride, and urea resin. Coloring is also optional, such as milky or transparent.

Means for providing a functional member on the inner surface side of each half are shown in FIGS. 3, 4 and 5. Also in this case, a configuration is shown in which the functional member is applied or embedded on the inner surface side of the molded product (half) in the process of injection molding.

FIG. 3 is a sectional view of a main part showing the concept of injection molding. In FIG. 3, 2C is a fixed type, 3C is a movable type,
Reference numeral 7C denotes a movable portion provided at least in a part of the cavity, which is freely movable, 41C denotes a functional member injection device, 110 denotes a mold, and 111 denotes a molded product such as a bottomed container.

The molding operation of FIG. 3 will be described. A mold 110 having a movable portion 7C that can freely move in and out of at least a part of the cavity is prepared, and a molding resin member is supplied to the cavity. Thereafter, the movable portion 7C is retracted to provide a gap. By supplying a gas containing a functional member to the gap (not shown), the functional member is arranged at least on the inner surface side of the concave portion of the molded article 111.

As described in the first embodiment, it goes without saying that the gas containing the functional member may also contain the adhesive member. What is necessary is just to implement similarly to Embodiment 1 about the kind of a functional member, a molded resin member, an adhesive member, etc.

FIGS. 4 and 5 show another injection molding method for disposing a functional member on the inner surface side of a molded product. FIG. 4 is a sectional view of a main part showing the concept of injection molding. FIG.
3 shows a state in which a gap is provided between the movable die 123 and the molded article 121 by retracting a small amount (several micrometers to hundreds of micrometers) of the mold 3.

4 and 5, reference numeral 41D is a functional member injection device, 121 is a molded product, 122 is a fixed mold, 12
Reference numeral 3 denotes a movable mold, 124 denotes a cylinder, and 150 dies.

The molding operation is performed by the movable mold 123 and the fixed mold 122.
And a pair of molds 150 comprising
The molding material is supplied to the cavity to form a molded product 121 such as a half. Thereafter, the movable mold 123 is retracted to provide a void (see FIG. 5), and the void includes a functional member. A functional member is provided on the surface of the molded article 121 by supplying gas.

As described in the first embodiment, it goes without saying that the gas containing the functional member may also contain the adhesive member. What is necessary is just to implement similarly to Embodiment 1 about the kind of a functional member, a molded resin member, an adhesive member, etc.

[0113]

As described above, according to the present invention, a functional member such as a photocatalyst or an antibacterial member is easily provided on the surface of the cassette half.

Further, in the injection or blow molding process, a functional member can be provided on the surface of the cassette half simultaneously with the molding. Further, the amount of the functional member used can be reduced.

Therefore, the work of arranging the functional member after the molding becomes unnecessary. As a result, the process can be simplified and the cost can be reduced.

Further, since the sheet base material is not adhered to the surface of the molded article and no wrinkles are generated, the molding process can be stabilized, the molding cycle can be shortened, and the shape of the molded article can be made arbitrary.

Further, the characteristics of the resin member used for injection or blow molding are not changed. For example, without changing the molding characteristics of the resin member, an arbitrary structure or a curved surface shape can be configured according to the variety of designs and the purpose of use.

The antibacterial member prevents the growth of mold and bacteria, and the photocatalyst decomposes contaminants adhering to the atmosphere or to the surface of the molded article. This enables a healthy and comfortable life even if an unspecified number of people share the disk cassette.

[Brief description of the drawings]

FIG. 1 is a perspective view of a disk cassette according to a first embodiment of the present invention.

FIG. 2 is a plan view of a disk cassette according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a main part of a molding apparatus used for molding a half according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a molding apparatus used for molding a half according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part showing a forming process of a forming apparatus used for forming a half according to the second embodiment of the present invention.

FIG. 6 is a sectional view of a main part of a molding apparatus used for molding a half according to the first embodiment of the present invention.

FIG. 7 is a sectional view of a main part of a blow molding apparatus used for molding a half according to the first embodiment of the present invention.

FIG. 8 is an enlarged sectional view of a mold in FIG. 8;

[Explanation of symbols]

 1,10 Disc cassette 2,22 Information recording medium 3,23 Upper half 4 Lower half 5,25 Opening 6,26 Shutter 7,28 Functional member (photocatalyst or antibacterial member) 8,23 Cassette housing 27 Shutter area 2C, 122 Fixed type 3C, 123 Movable type 7C Movable part 41C, 41D Functional member injection device 110, 150, 201 Mold 111, 121 Molded product 124 Cylinder 201A Gap 202 Blow pin 203 Pressurized air source 207 Luminescent substance 211 Parison 230 Pump 231 Supply pipeline

Claims (6)

(57) [Claims] 1. A mold having a movable part which is free to advance and retreat in at least a part of a cavity is provided, a molding material is supplied to the cavity, and thereafter, the movable part is retracted to provide a gap, By supplying a gas containing one of the photocatalyst and the antibacterial member to the gap, one of the photocatalyst and the antibacterial member is disposed in at least a part of the surface of the cassette half. A method for forming a cassette half. 2. The method according to claim 1, wherein the gas contains an adhesive. 3. A pair of molds comprising a movable mold and a fixed mold is prepared, a molding material is supplied to a cavity of the mold, and thereafter, the movable mold is retracted to provide a gap. Supplying a gas containing either a photocatalyst or an antibacterial member to the portion, thereby disposing either the photocatalyst or the antibacterial member on the surface of the cassette half. . 4. A pair of molds comprising a movable mold and a fixed mold is prepared, a molding material is supplied to a cavity of the mold, and thereafter, the movable mold is retracted to form a void. By supplying one of the photocatalyst and the antibacterial member to the gap portion, and further moving the movable mold forward, one of the photocatalyst and the antibacterial member is pressed and buried near the surface of the cassette half. A method for forming a cassette half, characterized in that: 5. A blow molding method in which an extruded parison is clamped by a mold and a pressurized gas is blown into the parison, wherein the mold and the parison outer peripheral surface are sandwiched by the mold during the process of clamping the parison. By introducing a pressure gas containing one of the photocatalyst and the antibacterial member, the cassette half is characterized in that one of the photocatalyst and the antibacterial member is arranged on the outer peripheral surface of the parison. Blow molding method. 6. A blow molding method in which an extruded parison is sandwiched by a mold and a pressurized gas is blown into the parison, wherein a photocatalyst or an antibacterial member is formed in the parison during the process of clamping the parison by the mold. A method for blow molding a cassette half, wherein one of a photocatalyst and an antibacterial member is disposed on the inner peripheral surface of the parison by introducing a pressure gas containing either one of them.