JPH07130133A - Method for sticking label to case for housing disk-shaped recording medium - Google Patents

Abstract

PURPOSE:To eliminate the need for the labor of an operation to stick a label to be stuck to a case constituting a disk cartridge. CONSTITUTION:A female mold 20 and a male mold 30 are pressed to each other to form a cavity C. The label RL is previously temporarily stuck to the prescribed point of the female mold 20 and a molten synthetic resin is injected in this gate from a gate. The label RL is then welded by the molten synthetic resin, by which the label is stuck to the half constituting the case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for attaching a label for describing information to a case for accommodating a disc-shaped recording medium.

[0002]

2. Description of the Related Art Conventionally, a disc-shaped recording medium used in a recording / reproducing apparatus is housed and protected in a disc cartridge to prevent damage and dust adhesion when not in use.

The applicant of the present application has previously proposed a disk cartridge of the type shown in FIG. 6 as such a purpose (Japanese Patent Application No. 02-040860, etc.). FIG. 6 (A),
As shown in (B), reference numeral 101 is a case of a disk cartridge, and the case 101 is made of synthetic resin and is composed of an upper half piece 101a and a lower half piece 101b of a rectangular flat plate-like casing. . The case 101 is a "disk-shaped recording medium" in which optical information is recorded.
A 5-inch optical disc 102 is stored. In the center of the lower half piece 101b of the case 101, the optical disk 102
A rotary hole 104 for rotating the optical disc 102 by a spindle motor (not shown) when it is loaded in a recording / reproducing apparatus (not shown) is formed. From this rotary hole 104 to the central portion of the optical disc 102. The provided hub portion 102a is exposed. Optical heads (not shown) for reading information recorded on the optical disc 102 are provided on the upper and lower halves 101a and 101b of the case 101.
The head insertion hole 103 is formed so as to be accessible.

When the optical disk 102 is not used,
A shutter 105 is attached to the case 101 to prevent dust from entering the case 101 through the rotation hole 104 and the head insertion hole 103. The shutter 10
5 is formed by bending a thin metal plate such as stainless steel into a U-shaped cross section from approximately the center, and an opening / closing plate portion 106 for opening / closing the rotation hole 104 and the head insertion hole 103, and a plate opening / closing plate portion 106 more than the opening / closing plate portion 106. It has an auxiliary opening / closing plate portion 107 having a short bending length.

Then, in order to describe and display the type of information written on the optical disc 102, the upper and lower half pieces 101
The label R is affixed over a and 101b, and label spaces 120a and 120b, which are shallow recesses for affixing the label R, are formed on both front and back surfaces of the case 101.

[0006]

However, the operation of attaching the label R to the label spaces 120a and 120b is generally performed by the user, but the attaching operation is troublesome, and the manufacturer side attaches it at the time of shipping. There is a troublesome thing such as management of the label R that must be done.

Therefore, the present invention has been made in order to solve the above problems, and provides a method of attaching a label to a storage case for a disk-shaped recording medium, which eliminates the trouble of attaching a label and the trouble of managing a label. The purpose is to

[0008]

In order to achieve the above object, the present invention provides a label for a disc-shaped recording medium storage case in which a label for describing information is attached to a synthetic resin case in which the disc-shaped recording medium is stored. In the sticking method, the label is preliminarily fixed to the inner surface of the molding die of the disc-shaped recording medium storage case, and a molten synthetic resin is injected from the gate to insert-mold the label into the disc-shaped recording medium storage case. I decided to do it.

Further, an adhesive layer is provided on the contact side of the label with the molten synthetic resin for insert molding.

[0010]

The label is prepared in advance with, for example, polycarbonate, and the label is temporarily fixed to a predetermined position on the inner surface of the mold. In this state, the female mold and the male mold are brought into contact with each other, and molten polycarbonate is injected from the gate to mold the case. Then, the label and the injected polycarbonate are welded, and the label is attached to the case.

Further, when the label is made of PET and the molten synthetic resin to be injected is polycarbonate, for example, the materials are different from each other, and therefore it is difficult to weld. Therefore, when an adhesive layer is formed on the side of the PET label that comes into contact with the molten polycarbonate, the adhesive layer is welded to the molten polycarbonate, and the PET label is attached to the polycarbonate via the adhesive layer. . Therefore, the PET label is attached to the polycarbonate case.

[0012]

The present invention will be described below with reference to the illustrated embodiments. 1 (A) and 1 (B) show an upper half piece and a lower half piece of a case prepared by the label sticking method of the present invention, and FIG. 2 is a perspective view of a mold of the lower half piece used in the embodiment of the present invention. 3 shows a perspective view of a label to be insert-molded on the lower half piece, and FIG. 4 shows a perspective view of a cross-sectional view of a main part of the mold. In addition, the same reference numerals are given to the parts already described, and the duplicated description will be omitted.

First, the outer shape of the upper and lower half pieces 101a and 101b of the case produced by the label sticking method of this embodiment will be described with reference to FIGS. 1 (A) and 1 (B). Figure 1
As shown in (A), the outer shape of the upper half piece 101a formed of a synthetic resin such as polycarbonate has a substantially square shape, a head insertion hole 103 is formed on the right side of the central portion, and various other holes, notches, etc. are formed. Has been formed. The label (top label) R _U for upper halves made of polycarbonate on the left side of the upper halves 101a is welded, stuck by insert molding.

Similarly, as shown in FIG. 1B, the outer shape of the lower half piece 101b formed of polycarbonate is substantially square, and the spindle hole 1 extends from the center to the right side.
04, and other various holes, notches, etc. are formed. Then, a label for the lower half piece (lower label) R _D made of polycarbonate is welded and attached by insert molding on the left side of the lower half piece 101b.

Next, the lower half piece 101a will be described with reference to FIG.
A mold (female mold) 20 for molding the will be described. As shown in FIG. 2, the female die 20 is configured to include a projection portion 1 for forming the head insertion hole 103, a gate G, various pins, and the like. The portion surrounded by the chain double-dashed line and having the reference numeral 2 is a portion to which the lower label R _L (see FIG. 3) is temporarily attached.

The lower label R _L is, as shown in FIG.
It consists of a rectangular plate made of polycarbonate. Then, FIG. 4 shows a cross-sectional view taken along line IV-IV when the female die 20 and the male die 30 are opposed to each other.

As shown in FIG. 4, the mold M comprises a female mold 20 and a male mold 30, and a cavity C is formed by bringing the female mold 20 and the male mold 30 into contact with each other. . Next, a method of molding the lower half piece 101b using the mold M shown in FIG. 4 will be described.

First, a lower label _RL made of polycarbonate is temporarily attached below the female die 20 (a portion corresponding to reference numeral 2 in FIG. 2), and the female die 20 and the male die 30 are brought into contact with each other. In this abutting state, melted polycarbonate is injected from the gate G (see FIG. 2), left for a predetermined time, and then the female die 20 and the male die 30 are opened. Then, the lower half piece 101b shown in FIG.
Is completed. In this case, since the synthetic resin forming the lower label _RL and the molten synthetic resin to be injected are both polycarbonate and the same material, the lower label E _D and the lower half piece 101b are completely welded / attached, There is no risk that the label R _L will come off.

Further, in the case of the mold for the upper halves 101a (not shown) in the same manner, after the temporal stuck on label R _U in the female, brought into contact with the male and female, melting Polycarbonate may be injected to mold the upper half piece 101a.

When the material of the lower label R _L is different from the material of the lower half piece (for example, the lower label is PET and the lower half piece is polycarbonate), as shown in FIG.
An adhesive layer 11 made of polycarbonate is formed in advance on the molten polycarbonate injection side of the lower label R _D1 made of.
Then, the lower label R _D1 side having such a configuration is preliminarily attached to a predetermined portion of the female die 20 in advance, and molten polycarbonate is injected from the gate G. Then, since the injected polycarbonate and the adhesive layer 11 are the same material, they are welded, and as a result, the lower label R _D1 is attached to the lower half piece 101 via the adhesive layer 11.
Attached to b.

Conventionally, ruled lines are generally printed on the label in advance, but according to the present invention, since the position of the label is fixed, even if a label with a picture is inserted, the label of the disc cartridge is not printed. It does not spoil the aesthetics.

[0022]

As described above, according to the present invention, the label to be attached to the case is put in the attached state by welding and inserting when the half of the case is molded, so that the user attaches the label. This saves time and the manufacturer can save time and effort to manage the label at the time of shipping.

[Brief description of drawings]

FIG. 1 is a diagram showing a half piece of a case made according to an embodiment of the present invention, in which (A) is an external perspective view of the upper half piece, and (B).
FIG. 4 is an external perspective view of a lower half piece.

FIG. 2 is a perspective view of a mold used in an embodiment of the present invention.

FIG. 3 is an external perspective view of a label used in the embodiment of the present invention.

FIG. 4 is a cross-sectional view of a mold used in an example of the present invention.

FIG. 5 is a sectional view of an essential part of a mold used in another embodiment of the present invention.

6A and 6B are views showing a case constituting a conventional disc cartridge, in which FIG. 6A is a front perspective view and FIG. 6B is a rear perspective view.

[Explanation of symbols]

C ... Labels 20 ... female die 30 ... male label R _L ... under halves of the cavity G ... gate M ... die R _U ... for the upper halves

Claims (2)

[Claims] 1. A label attaching method for a disc-shaped recording medium storage case, wherein a label for information is attached to a synthetic resin case in which the disc-shaped recording medium is stored. A disc-shaped recording medium storage case, characterized in that the label is preliminarily fixed to the inner surface of the disk, and a molten synthetic resin is injected from a gate to insert-mold the label into the disc-shaped recording medium storage case. Labeling method. 2. The label sticking method for a disc-shaped recording medium storage case according to claim 1, wherein an adhesive layer is provided on the contact side of the label with the molten synthetic resin for insert molding.