JPH06818A - Retreatment method of cassette for video printer - Google Patents

Abstract

PURPOSE:To reuse a cassette for a used video printer. CONSTITUTION:A cassette 4 for a used video printer is pulverized as it is, made into small piece pulverized matters, pellets are made of the small piece pulverized matters by passing them through an extruding machine, the pellets are supplied to an injection molding machine, heated, melted, injected into a mold and an outer frame 1 or a reel 2 of the cassette for the video printer is made again. A ribbon 3 is made fresh of an unused material. Since an important part of the cassette 4 is the ribbon 3, even if the made cassette fulfils sufficiently its function. Since the cassette 4 is pulverized as it is without dismantling the same, retreatment operation is easy, a plastic waste matter is reduced drastically by the retreatment operation and earthly environment is preserved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reprocessing method for a cassette for a video printer.

[0002]

2. Description of the Related Art A cassette for a video printer is used as an ink ribbon when a video image is printed. As shown in FIG. 1, it is usually an outer frame 1, a reel 2, and three colors of cyan, yellow and magenta. It is composed of the ribbon 3 coated with the above paint.

The cassette for the video printer is
Unlike a video cassette tape, which can be used to record and play back images, and can be used any number of times, it is used up when the ribbon is used up.

Conventionally, this used cassette for a video printer is buried in a waste site or incinerated in an incinerator together with general plastic waste. Alternatively, cassettes for video printers are used, in part, with common plastic waste to remelt and make lower performance products such as pilings and blocks.

[0005]

However, in these methods, the cassettes for video printers have not been effectively utilized as plastic resin resources,
There is a strong demand for a simple and effective use of plastic resources.

Therefore, an object of the present invention is to provide a method for reprocessing a cassette for a video printer, which enables a sufficient effective use as a plastic resource by a simple method, and to effectively use the resource.

[0007]

In order to achieve the above object, the method of reprocessing a cassette for a video printer according to the present invention is a method of reassembling a used cassette for a video printer, which comprises an outer frame, a reel and a ribbon. As it is, it is crushed into small pieces, and the crushed small pieces are passed through an extruder to make pellets.These pellets are supplied to an injection molding machine and heated and melted to be injected into a mold, or the crushed small pieces are left as they are. It is supplied to an injection molding machine, heated, melted, and injected into a mold to remake an outer frame or reel of a cassette for a video printer.

When the crushed small pieces are passed through an extruder to make pellets, raw materials for making an unused outer frame or reel are added, and the pellets to which the raw materials are added are supplied to an injection molding machine, Alternatively, at the time of injection molding, the raw material for making an unused outer frame or reel is supplied at the same time, and the material for a used video printer cassette and the raw material for making an unused outer frame or reel are supplied. It is preferable to make an outer frame or reel of a cassette for a video printer in which the above are mixed.

In place of or in addition to the raw material for making the above-mentioned unused outer frame or reel, rubber, compatibilizer, polyvinyl alcohol fiber, polypropylene fiber, polyester fiber, natural fiber, or phenol-based, Acrylic or styrene type fine particle resin may be added.

[0010]

Since the used cassette for the video printer is crushed as it is, the labor and time required for disassembling it into individual parts are unnecessary, and the reprocessing work of the cassette for the video printer is simplified.

Further, since the used video printer cassette is reprocessed to form an outer frame or reel of the video printer cassette which does not require the high quality of the ribbon, a reprocessed part can be sufficiently processed. , And can function as its outer frame or reel.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings and tables.

First, the first embodiment will be described.

In this embodiment, the outer frame or reel of the video printer cassette is recreated by injection molding only the crushed pieces of the used video printer cassette.
The crushed small pieces may be passed through an extruder to form pellets, and the pellets may be supplied to an injection molding machine, or the crushed small pieces may be directly supplied to the injection molding machine. The outer frame and reel thus formed are combined with an unused ribbon, that is, a ribbon using a new material, to form a cassette for a video printer. It should be noted that the used video printer cassettes are collected from users by the retailers, manufacturers, etc., and established a route to collect them in a predetermined factory. Etc. The cassette thus collected is used for reprocessing. By establishing this route, it is possible to prevent the cassette for the video printer from becoming plastic waste.

Experiments for obtaining basic data conducted in this embodiment will be described.

In this experiment, the outer frame 1 shown in FIG.
Video print CVP-G7 cassette 4 assembled by fitting parts consisting of reel 2 and ribbon 3
(Manufactured by Sony Corporation) was used. It was used for about 3 years since it was commercialized. The outer frame 1 and the reel 2 have a stylon H8765 and a stylon 470, respectively.
(Trade name, manufactured by Asahi Kasei Kogyo Co., Ltd.), both of which are impact-resistant polystyrene containing styrene as a main component and blended with a rubber material to improve impact resistance thereof. On the other hand, for the ribbon 3, a polyethylene terephthalate (PET) film is heat-resistant lubricated on the surface in contact with the heating head of the video printer, and the surface in contact with the printing paper is coated with a dye of three colors with a binder containing polyvinyl butyral as a main component. is there. Therefore, it was found that the compatibility is good, although the physical properties of both are greatly different.

The cassette 4 as it is, without being disassembled into individual parts, is first subjected to 10 kg / hr using a crusher.
It was crushed at a crushing speed of to obtain a crushed small piece. The crusher has
Plastic crusher manufactured by Shoshin Co., Ltd. (MS250 type, 3H
P, 2.2 Kw) was used. The outer frame and reel have a diameter of 7 mm
Obtained as a pointed grind below, the ribbon is about 3
The obtained product was obtained as a pulverized product in the form of a paper piece having a size of 3 cm.

Next, the crushed small pieces were passed through an extruder and pelletized. For the extruder, we have a Bearstorf ZE40A.
A mold (manufactured by Beth Atorf) was used. As shown in FIG. 2, this extruder has 10 locations (FIGS. 2 and dies).
The temperature can be set with (the set temperature and the actual measured temperature during the experiment are shown in the figure), and there is a port for sample supply or degassing at the upper part of and. The rotation speed of the screw can be set arbitrarily, and the discharge amount is adjusted by arbitrarily relating the supply amount of the sample and the rotation speed of the screw.
The mixture of the outer frame, the reel, and the ribbon was separately supplied from the supply port of, and the ribbon floating above the pulverized product at the time of pulverization was separately supplied. In this way, the ribbon floating above the crushed material at the time of crushing is supplied from a separate supply port separately from the outer frame, the mixture of the reel and the ribbon, so that the outer frame,
It is possible to obtain pellets having the same reel and ribbon mixing ratio, and at the same time, it is possible to use the entire cassette 4 as a material for the reprocessing of the present invention. Screw rotation speed is 300
In an experiment with rpm, the temperature of the resin discharged from the die was 230 ° C., the discharge rate was about 300 kg / hr, and there was no strand breakage, and good strands were obtained. Then, the strand was water-cooled in a water tank set near the discharge port and cut with a cutter to form a pellet having a particle diameter of 2 mm.

Next, using the pellets as a raw material, an injection molding machine was used under the molding conditions shown in Table 1 to form a dumbbell shape (AS).
TM1 (thickness 3mm) and strip shape (127 × 12.7 ×)
A test piece of 3.2 mm) was prepared. Cylinder temperature is about 2
Since the temperature was set to 40 ° C., a phenomenon considered to be insufficient in thermal stability, that is, spray breakage, insufficient release, and a decrease in viscosity of the purge strand were slightly observed. The appearance of the molded dumbbell-shaped and strip-shaped test pieces was a glossy black color, which was not much different from the black color of the outer frame and reel parts of the conventional new product.

[0020]

[Table 1]

Using dumbbell-shaped and strip-shaped test pieces, tensile, bending, and Izod impact values were measured in accordance with the ATSM test method such as test method, test conditions, and test room conditions. The results are shown in Table 2. In the table, for comparison, Styron H8765 and Stylon 470 used as raw materials for the outer frame and reel were mixed in the same ratio as the outer frame and reel, and pelletized under the same extrusion conditions as above. The tensile, bending, and Izod impact values obtained by making test pieces molded under the same molding conditions as above and tested under the same conditions as above are also shown. According to this, it can be seen that the test piece using the used cassette has the elongation at break and the Izod impact strength significantly decreased, and is hard and brittle as compared with the test piece using the unused raw material.

[0022]

[Table 2]

The cause of this is considered to be due to a change with time from the time of manufacturing the cassette 4 (three years have passed since the time of manufacturing), heat melting during reprocessing, mixing of different materials, and the like. Therefore, in order to investigate the cause, cut out the same portion of the video print CVP-G7 cassette immediately after molding and that after three years of manufacture,
The Izod impact values were compared. In addition, it measured by the method according to American Society for Testing and Materials (ASTM) D256. This is shown in Table 3. As shown in the table, 3 after manufacturing
The Izod impact value of the old one was greatly reduced. Therefore, it can be understood that the major cause of the hardness and brittleness of the test piece formed by the reprocessing is deterioration of the plastic material due to aging, decrease in molecular weight, and the like.

[0024]

[Table 3]

From the above experiment, it is considered that the breaking elongation and the Izod impact strength are lowered when the outer frame and the reel are manufactured according to the present embodiment. Therefore, the cassette 4 constructed by assembling together with the ribbon using the unused material is It is necessary to carry, use, etc., paying attention not to give a strong impact force or a pressing force of a predetermined size or more.

The used cassette 4 is not pelletized but is crushed by a crusher and then directly supplied to an injection molding machine,
When the outer frame and the reel are formed, the ribbon may be easily separated from the outer frame and the reel. Therefore, a supply port for supplying the ribbon may be separately provided and the ribbon may be supplied from this supply port.

Next, a second embodiment of the present invention will be described.

In order to improve the elongation at break and the Izod impact strength, Styron H8765 and Stylon 470 used as raw materials for the outer frame and reel were mixed in the same ratio as the outer frame and reel and pelletized through an extruder. The pellets of the used cassette 4 according to the first embodiment are mixed and supplied to the injection molding machine.

Experiments of two kinds of mixing ratios conducted in this example will be described.

The mixing ratio between the reprocessed product pellets using the used cassette and the above-mentioned unused raw material pellets is 50:
50 and 25:75 (weight ratio) were supplied to the injection molding machine to obtain dumbbell-shaped and strip-shaped test pieces. In this case, the phenomenon of reduced thermal stability was not observed. Using this test piece, tensile, bending and Izod impact values were measured by the same method as in the first embodiment. The results are shown in Table 4. From this result, when the unused raw material pellets are mixed, the elongation at break and the Izod impact strength are greatly improved, and particularly when the mixing ratio is 25:75, the degree of improvement is remarkable.

[0031]

[Table 4]

Therefore, for example, when the cassette is assembled using the outer frame and the reel which are injection-molded with the mixing ratio of 25:75, the fragility of the cassette is greatly improved, and therefore the cassette using the unused material is used. Transportation similar to
It can be handled during use. In the case of reusing the used cassette 4 by this, if it is assumed that the number of products produced is always the same, only 1/4 of the used cassette 4 is used as a raw material for reproducing the cassette. The remaining 3/4 is not used as this raw material, but even in this case, the used cassette can be used more effectively.

Next, a third embodiment of the present invention will be described.

In order to improve the elongation at break and the Izod impact strength, in addition to the second embodiment, a method of blending (polymer alloy) a rubber material (resin having high flexibility), fiber, thin plate , There is a method of compounding with some kind of powder or other reinforcing material.

First, a method of blending (polymer alloy) a rubber material (resin having high flexibility) will be described. As already mentioned, the stylon, which is the raw material for the outer frame and reel, is made by blending a rubber material to give flexibility, but when injection molding is performed using the used cassette 4 as described above. Again lacks flexibility, so
A rubber material may be further added to the used cassette 4 to form an outer frame and a reel so as to have flexibility. As the rubber-like material, for example, butadiene-styrene rubber which is compatible with the styrene resin can be used.

Next, a method of forming a composite with a reinforcing material will be described. As the fiber reinforcement material, polyvinyl alcohol fiber, polypropylene fiber,
Polyester fiber and natural fiber are suitable. And
Since the fibers undergo an injection molding process, it is preferable to make them into short fibers of about 1 mm to 6 mm and mix them, and the mixing ratio (weight ratio) of the fibers is preferably in the range of 0.5 to 30%.

Further, it may be compounded with a reinforcing material such as a phenol-based, acrylic-based or styrene-based fine particle resin. Further, flaky glass or a thin plate material such as mica, powder of alumina, silicon oxide, chidsan, cerbene, viscosity or the like may be used as a reinforcing agent.

These rubbery materials or reinforcing materials may be mixed in during pellet production or may be supplied to the molding machine at the injection molding stage.

Table 5 shows various strengths obtained when various rubber materials or reinforcing materials are mixed at a predetermined ratio.
Shown in.

[0040]

[Table 5]

In the above-mentioned first to third embodiments, in order to increase the compatibility between the outer frame and the reel and the ribbon, a compatibilizing agent is positively added to further improve the physical properties of the regenerated molded product. Good. As the compatibilizer, for example, polyethylene terephthalate-styrene graft polymer, polyester-styrene block copolymer, acrylic ester-styrene copolymer, styrene-acrylic ester graft copolymer, etc. can be used. When the rubber resin is mixed as described above, as the rubber resin,
It is more preferable to select a compatible resin.

[0042]

As described above, according to the present invention, the used video printer cassette is not disassembled as it is, but is crushed and then injection-molded again to form the outer frame, which is a component of the video printer cassette. ， Since it was decided to make reels, it is possible to recycle used video printer cassettes extremely effectively, and it is possible to greatly reduce pollution of the global environment due to plastic waste.

Also, without disassembling the used cassette,
In order to crush it as it is, after disassembling it into individual parts,
The reprocessing work becomes extremely easy without requiring a great deal of manpower as in the case of collecting and reprocessing only the same type of parts.

[Brief description of drawings]

FIG. 1A is an external perspective view of an example of a video printer cassette, and FIG. 1B is an exploded perspective view of FIG. 1A.

FIG. 2 is a conceptual diagram of an example of an extruder.

[Explanation of symbols] 1 outer frame 2 reel 3 ribbon 4 cassette for video printer

Claims (3)

[Claims] 1. A used video printer cassette consisting of an outer frame, a reel and a ribbon is crushed as an assembly into a crushed small piece, and the crushed small piece is passed through an extruder to form pellets. The pellets are supplied to the injection molding machine and heated and melted to be injected into the mold, or the crushed small pieces are supplied to the injection molding machine as they are and melted by heat to be injected into the mold. A method for reprocessing a cassette for a video printer, which comprises remaking an outer frame or a reel. 2. The method according to claim 1, wherein when the crushed small pieces are passed through an extruder to form pellets,
To add a raw material for making an unused outer frame or reel and to feed the pellets containing the raw material to an injection molding machine, or to make an unused outer frame or reel during injection molding. To simultaneously supply the above raw materials to produce an outer frame or reel of a cassette for a video printer in which the material for the used cassette for a video printer is mixed with the raw material for making the unused outer frame or reel. A method for reprocessing a cassette for a video printer, characterized by: 3. A rubber material, a compatibilizer, polyvinyl alcohol fiber, polypropylene fiber, polyester fiber, in place of or in addition to the raw material for making the unused outer frame or reel according to claim 2. A method for reprocessing a cassette for a video printer, characterized in that a natural fiber, or a phenol-based, acrylic-based or styrene-based fine particle resin is added.