JP2007062061A - Method for manufacturing pencil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a pencil which can surely protect a printed face, has no possibility of deteriorating the quality of a product, and can reduce a cost while safety is ensured in the case that heat transfer printing is used. <P>SOLUTION: The method for manufacturing the pencil has a peripheral face coating process 12 for coating the peripheral face of a shaft of the pencil, a head forming process 13 for forming the head of the shaft of the pencil into a semi-spherical shape, a head coating process 14 for coating the head of the shaft of the pencil, and a heat transfer printing process 15 for heat-transferring a transfer film printed with a picture pattern to the shaft of the pencil and printing the picture pattern on the surface of the shaft of the pencil. In the method for manufacturing the pencil, the peripheral face coating process, the head forming process and the head coating process are performed in processes preceding to the heat transfer printing process. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a pencil manufacturing method, and more particularly to a pencil manufacturing method in which a pencil is manufactured by performing thermal transfer printing on a pencil shaft portion.

Conventionally, hot stamp printing, dry offset printing, and thermal transfer printing exist as methods for printing a pattern on the surface of a pencil shaft.

Hot stamp printing is a method in which a film coated with a foil such as gold or silver and the peripheral surface of a pencil shaft portion are aligned and pressed with a relief printing plate to which the heat is applied to transfer the foil. The printing surface is expressed in a single color such as silver or gold.
Dry offset printing is a method in which ink of each color is placed on a rubber plate and the rubber plate is pressed against the peripheral surface of the pencil shaft portion while rotating the pencil. Unlike the hot stamp printing, the printing surface is expressed in a plurality of colors. Further, since the printing surface is easily damaged, it is necessary to coat with a lacquer paint after printing.
Thermal transfer printing is a method in which printing is performed on a transfer film by a printing apparatus such as an ink jet printer, the transfer film and the peripheral surface of the pencil shaft portion are aligned, heat is applied at about 250 ° C., and pressure is applied. The printing surface is expressed in a plurality of colors as in dry offset printing. Furthermore, it is possible to express shades of color such as gradation. It is more expensive than dry offset printing or hot stamp printing.

Among the printing methods described above, dry offset printing has been generally used so far in consideration of the balance between the quality of the pattern and the cost.
The conventional printing process is as follows.
(1) Woodworking process for forming the pencil shaft part (2) Peripheral surface painting process for painting the peripheral surface of the pencil shaft part (3) Dry offset printing process (including the coating process for the printed surface)
(4) Small cutting process for cutting the tail of the pencil shaft flatly (5) Heading process for forming a hemisphere on the head of the pencil shaft (6) Head coating process for painting the head of the pencil shaft

In the printing process using the dry offset printing, it is necessary to perform (5) the heading process and (6) the head coating process after (3) the printing process.
This is a process in which the dry offset printing process is a process in which the pencil shaft portions are arranged in a line along the length direction and printed, and the pencil shaft portion arranged on the front side is arranged on the rear side. The step of pushing in the head part of the shaft part is included, and when this step is performed with the head part of the pencil shaft part formed in a hemispherical shape, the rear end part of the front pencil shaft part and the rear pencil shaft part This is because a gap is formed between the hemispherical head and paint enters the gap and needs to be removed individually.

On the other hand, the number of consumers who prefer to purchase beautiful pencils, even though they are somewhat expensive, has increased, and in recent years, thermal transfer that can realistically represent the printed surface has been demanded due to the need for improving the quality of the pattern. Printing has been actively used.
In addition, after thermal transfer printing, it is required to reduce the number of steps in which the tool comes into contact with the printing surface as much as possible, and to build a step in which the printing surface is not easily damaged.

However, in the current printing process using thermal transfer printing, only the printing process is changed to thermal transfer printing, and the other processes are the same as the conventional processes, and therefore there are many processes after printing.
In particular, since the heading process for strongly clamping both sides of the pencil shaft portion is the final step, the printed surface of the pencil shaft portion on which thermal transfer printing has been performed may be damaged, resulting in a reduction in product quality.
Also, by performing thermal transfer printing, “burrs” occur at the end of the pencil shaft, and when the head of the pencil shaft is painted in the subsequent head coating process, the “burr” is applied to the paint. As a result of the depression and the formation of irregularities on the head surface of the pencil shaft, the appearance quality is impaired, and as a result, a defect occurs.

Furthermore, the heater is used in the thermal transfer process, and the lacquer paint, which is a volatile solvent, is used in the peripheral surface coating process and the head coating process, so the coating process and the thermal transfer printing process are performed in a nearby location. However, because the risk of ignition is high, the peripheral surface painting process and the head painting process described above are processes of the same quality, even though these work places must be spaced apart. The facility was installed in a nearby location.
Therefore, from the viewpoint of ensuring safety, when performing both steps separated from each other, in the conventional process in which the thermal transfer printing process is performed between the painting process and the painting process, the product is equipped with equipment for the painting process, The equipment for the thermal transfer process installed at a distance is reciprocated, resulting in a long moving distance of the product, resulting in poor production efficiency.
Therefore, in order to increase the work efficiency, it is necessary to install the equipment used for the painting process in two places, causing a situation where redundant equipment investment occurs, resulting in an increase in cost.
Therefore, it is necessary to configure a printing process suitable for thermal transfer printing that eliminates the above problems.

Accordingly, the object of the present invention is to produce a pencil that can reliably reduce the product quality by protecting the printing surface when thermal transfer printing is used, and can reduce costs while ensuring safety. It is to provide a method.

In order to achieve the above object, the invention described in claim 1 includes a peripheral surface coating step for coating the peripheral surface portion of the pencil shaft portion, a heading step for forming the head portion of the pencil shaft portion into a hemispherical shape, and A head coating process for coating the head of the pencil shaft part, and a thermal transfer printing process for printing the pattern on the surface of the pencil shaft part by thermally transferring a transfer film on which the pattern is printed on the pencil shaft part, It is a manufacturing method of the pencil which performs the above-mentioned peripheral surface painting process, the above-mentioned head attachment process, and the above-mentioned head painting process in the pre-process of the above-mentioned thermal transfer printing process.

In other words, the pencil manufacturing method according to the first aspect of the present invention is a pencil manufacturing method in which the head mounting step and the head coating step are not performed after the thermal transfer step.

According to a second aspect of the present invention, the head mounting step is a step of cutting the head of the pencil shaft portion to form a hemisphere.

That is, in the method for manufacturing a pencil according to the second aspect of the present invention, the method for manufacturing a pencil is performed by performing a heading process that requires a pencil shaft portion to be strongly held in a pre-process of a thermal transfer printing process.

The invention described in claim 3 is a method for producing a pencil, wherein a fork cutting process for forming a flat surface at the tail part of the pencil shaft part is performed in a subsequent process of the thermal transfer printing process.

According to a fourth aspect of the present invention, the fork cutting step is a step of cutting a tail portion of the pencil shaft portion to form a flat surface.

That is, in the pencil manufacturing method according to the third and fourth aspects of the present invention, the “burr” generated in the thermal transfer printing can be removed by cutting in a subsequent process. is there.

Further, the invention according to claim 5 is a peripheral surface coating step for coating the peripheral surface portion of the pencil shaft portion, and a heading step for cutting the head of the pencil shaft portion coated with the peripheral surface portion to form a hemisphere. And a head coating step for coating the head of the pencil shaft portion on which the hemisphere is formed, and thermal transfer printing for thermally transferring a transfer film on which a pattern is printed on the pencil shaft portion on which the peripheral surface portion and the head are painted It is a method of manufacturing a pencil, which includes a process, and a fork cutting process in which a peripheral surface portion and a head are painted and a tail portion of the pencil shaft portion on which a pattern is thermally transferred is cut to form a flat surface.

In the method of manufacturing a pencil according to the first aspect of the present invention, since the head coating process is not performed after the thermal transfer printing process, a defective product occurs due to “burrs” generated in the thermal transfer printing falling into the paint. Can be prevented.
In consideration of safety, the peripheral surface painting process and the head painting process, which are the same quality processes, are installed at a close distance, and the thermal transfer process equipment is installed at a location away from the painting process equipment. Even if it is, it is a process that does not perform the thermal transfer printing process between the peripheral surface coating process and the head coating process, so there is no need to reciprocate between the painting process equipment and the thermal transfer printing process equipment. A complicated movement can be avoided.
Therefore, since the moving distance of the processed product can be shortened, it is possible to improve the production efficiency while ensuring safety.
In addition, as described above, by performing the peripheral surface painting process and the head painting process, which are homogeneous processes, at close distances, materials and equipment can be shared, and the same materials and equipment can be duplicated at different locations. Therefore, the cost can be reduced in the equipment.
Further, by storing and holding a large number of painted pencil shaft portions, the product is completed simply by performing thermal transfer printing of various variations of the pattern, so that it is possible to respond quickly to customer requests.

Further, in the method of manufacturing a pencil according to the second aspect of the present invention, since the heading process for strongly clamping the pencil shaft portion is performed in the pre-process of the thermal transfer printing process, the print surface may be damaged after the thermal transfer printing. Can be reduced.

Moreover, since the manufacturing method of the pencil concerning this invention of Claims 3-4 can cut and remove the "burr" which generate | occur | produced in the edge part of a pencil shaft part by thermal transfer printing in a subsequent small cutting process. The good appearance quality of the pencil shaft can be effectively maintained.

In addition, the method for producing a pencil according to the present invention described in claim 5 can reduce the cost while ensuring the safety and ensuring the safety by assembling the process suitable for the thermal transfer printing process. it can.

A method for manufacturing a pencil according to Example 1 of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the pencil manufacturing method according to the present invention includes the following six steps.
(1) Woodworking process 11 for forming a pencil shaft portion of a pencil
(2) Peripheral surface painting step 12 for painting the peripheral surface of the pencil shaft
(3) Heading step 13 for forming a hemispherical surface on the head axis of the pencil shaft part
(4) Head painting process 14 for painting the pencil shaft head
(5) Thermal transfer printing step 15 for thermal transfer printing of the pattern on the pencil shaft
(6) Small cutting process 16 for cutting the tail of the pencil shaft portion flatly
Details will be described below in the order of the above steps.
In addition, in a present Example, illustration of the equipment and instrument used at each process is abbreviate | omitted.

The woodworking step 11 is a step of forming a pencil shaft portion by a manufacturing process generally used conventionally. As shown in FIG. 2, as shown in FIG. A pencil shaft portion 10 having a core portion 22 inserted through the center of the cross section along the length direction is used.
In the present embodiment, the pencil shaft portion 10 having a hexagonal cross section is used. However, the present invention is not limited to this embodiment, and the present invention can be applied even when the cross sectional shape is arbitrarily changed.

As shown in FIG. 3, the peripheral surface portion painting step 12 is a step of painting the peripheral surface portion 23 of the pencil shaft portion 10 formed in the woodworking step 11 with a single color paint.
Specifically, first, the pencil shaft part 10 is passed through the paint container containing the paint one by one (the paint container is not shown), and the excess paint adhered to the pencil shaft part 10 that has passed through the paint container. The iron die is removed with a rubber die for ironing (referred to as ironing, rubber die is not shown), and then the pencil shaft portion 10 is dried, and the process up to this is taken as one painting cycle.
Next, the pencil shaft part 10 after coating and drying is again passed through the paint container, and the above coating cycle is repeated about six times.
As the paint, a nitrocellulose lacquer paint obtained by dissolving nitrocellulose in a solvent and adding a white pigment is used.
In addition, although the present Example demonstrated using a white pigment, it is not limited to a present Example, Red, a transparent color, etc. can be changed arbitrarily.

Nitrocellulose-based lacquer paints have high quick-drying and water resistance, are not easily scratched by rubbing with machines in the subsequent process, and are excellent in scratch resistance. There is a risk, and great care must be taken in the safety management of equipment and manufacturing processes that are fire-proof.
Accordingly, it is necessary to install a heater used in a thermal transfer printing process described later and the lacquer paint at a distance from each other, and it is desirable to install them in different buildings.
Since the paint cannot be dried at a high temperature from the viewpoint of maintaining the quality of the pencil shaft portion 10 or the coating film, natural drying is used.
In this embodiment, natural drying is used for drying the paint, but the present invention is not limited to this embodiment, and can be applied to the case where a blower or a hot air dryer of about 30 to 40 ° C. is used.
As shown in FIG. 3, the pencil shaft portion 10 that has undergone the above steps is coated on the peripheral surface portion 23, but the head portion 24, the tail portion 25, and the core portion 22 are not coated.
Further, as shown in FIG. 3, the head peripheral edge portion 26 and the tail peripheral edge portion 27 are coated with the paint flowing in from the peripheral surface portion 23, but can be removed in other processes described later, so this state The process proceeds to the next step.

As shown in FIG. 4, the heading step 13 is a step of cutting the head 24 of the pencil shaft portion 10 that has undergone the peripheral surface coating step 12 to form a hemispherical shape.
Specifically, the cutting is performed by chamfering the entire region of the head peripheral portion 26 of the pencil shaft portion 10 with a cutting tool (the cutting tool is not shown).
The chamfering is performed by holding the both sides 28 and 29 of the pencil shaft portion 10 with a holding device (a holding device is not shown) and contacting the peripheral edge portion 26 and the cutting device with the pencil shaft. This is done by rotating the part 10 itself.
When the chamfering as described above is continuously performed, the cutting area of the head peripheral portion 26 of the pencil shaft portion 10 is gradually increased, and the head portion 24 of the pencil shaft portion 10 is formed in a hemispherical shape.
Accordingly, since the pencil shaft portion 10 itself must be rotated at the time of cutting, it is necessary to firmly hold both side portions 28 and 29 of the pencil shaft portion 10 with a holding tool.
For this reason, since this step is a step in which the both side portions 28 and 29 of the pencil shaft portion 10 are highly likely to be damaged, sufficient care must be taken in handling the pencil shaft portion 10.
As shown in FIG. 4, the pencil shaft portion 10 having undergone the above steps is formed in a hemispherical shape with the wood shaft portion 21 and the core portion 22 exposed in the head portion 24.
In this step, as shown in FIG. 4, since the tail portion 25 is not processed, it is the state in which the tail peripheral portion 27 is painted without changing from the state after the peripheral surface painting step 12. Since it can be removed in the small cut process 16 to be described later, the process proceeds to the next process in this state.

As shown in FIG. 5, the head coating step 14 is a step of painting the head 24 of the pencil shaft portion 10 formed in the hemispherical shape by the head mounting step 13 with a single color paint.
Since the coating method in this process is the same process as the peripheral surface coating process 12, the following description will be omitted while omitting overlapping parts.
In the paint container containing the paint, only the head 24 of the pencil shaft portion 10 is immersed, and, like the peripheral surface coating step 12, the iron coating is performed and then dried, and this step is repeated about six times. .
The paint is a nitrocellulose-based lacquer paint containing a white pigment as in the peripheral surface coating step 12.
Therefore, since the head coating process 14 and the peripheral surface coating process 12 include processes of the same quality, it is desirable to share the tools and solvents used.
As shown in FIG. 5, the pencil shaft portion 10 that has undergone the above steps is coated on the head 24, and the coating of all the portions to be painted is completed.
Accordingly, the pencil shaft portion 10 is not painted in the subsequent step of this step.
In this step, as shown in FIG. 5, since the tail portion 25 is not painted, the tail peripheral portion 27 is painted without changing from the state after the head mounting step 13, but will be described later. In this state, the process proceeds to the next process.

As shown in FIG. 6, the thermal transfer printing step 15 is a method in which a pattern 31 is thermally transferred and printed on the peripheral surface portion 23 of the pencil shaft portion 10 on which the peripheral surface portion 23 and the head portion 24 are coated.
Specifically, printing is performed on a transfer film (transfer film is not shown) by a printing apparatus such as an ink jet printer, the transfer film and the peripheral surface portion 23 of the pencil shaft portion 10 are aligned, and a heater (heater is shown in the figure). Is omitted)), heat is applied at about 250 ° C., and the resultant is compressed and printed.
Although not shown, the transfer film is composed of four layers, and an adhesive layer that can adhere the pattern 31 to the pencil shaft portion 10 from the contact surface side with the pencil shaft portion 10; An ink layer on which a pattern is printed, a release layer that can peel the ink layer and the base layer, and a base layer are laminated in the thickness direction.
The picture 31 can be expressed by a plurality of colors, and can express shades of colors such as gradation.
Further, as described above, from the viewpoint of safety, it is necessary to install the lacquer paint used in the peripheral surface coating process 12 and the head coating process 14 apart from the heater used in this process. It is desirable to install in different buildings.
As shown in FIG. 6, the pencil shaft portion 10 that has undergone the above-described process is printed with a pattern 31 from the top of the paint coated on the peripheral surface portion 23.
Moreover, as shown in FIG. 6, although the burr | flash 32 generate | occur | produces in the tail part 25 of the said pencil axis | shaft part 10, since it can be removed by the small cutting process mentioned later similarly to the tail part peripheral part 27 mentioned above, in this state, It is assumed that the process proceeds to this step.

The fork cutting step 16 is a step for cutting and flattening the tail portion 25 of the pencil shaft portion 10 as shown in FIG.
Specifically, both side portions 28 and 29 of the pencil shaft portion 10 are sandwiched, and the tail portion 25 of the pencil shaft portion 10 and a cutting tool (a cutting tool is not shown) are brought into contact with each other for cutting.
By this step, the burr 32 and the tail peripheral portion 27 formed in the previous step are also removed by cutting.
In this step, the amount of cutting is significantly smaller than the heading step 13, and the pencil shaft portion 10 itself does not need to be rotated at the time of cutting. It is much smaller than the attaching step 13.
Therefore, the possibility that the both side portions 28 and 29 of the pencil shaft portion 10 are damaged is a step lower than the heading step 13.
As shown in FIGS. 6 and 7, the pencil shaft portion 10 that has undergone the above-described process is formed by removing the burr 32 by cutting, exposing the tail periphery 27, and flattening the tail 25. It is formed.

The operation of the above embodiment will be described below.
In the pencil printing method according to the above embodiment, as shown in FIG. 1, the coating steps 12 and 14 are not performed after the thermal transfer printing step 15, so that the burrs 32 generated in the thermal transfer printing are applied as shown in FIG. It is possible to prevent a situation in which defective products occur due to falling into the area.
Therefore, a decrease in productivity due to the occurrence of defective products can be avoided.
In addition, as shown in FIG. 1, in consideration of safety, the peripheral surface coating process 12 and the head coating process 14, which are homogeneous processes, are installed at a close distance, and the thermal transfer process 15 is installed. Even when installed at a location away from the painting process equipment, the thermal transfer printing process 15 is not performed between the peripheral surface painting process 12 and the head painting process 14, so the equipment of the painting processes 12, 14 Therefore, it is not necessary to reciprocate the equipment of the thermal transfer printing process 15 and complicated movement of the processed product can be avoided.
Therefore, since the moving distance of the processed product can be shortened, it is possible to improve the production efficiency while ensuring safety.
In addition, as described above, by performing the peripheral surface coating process 12 and the head coating process 14, which are processes of the same quality, at a close distance, materials and equipment can be shared, and the same material and equipment are separated from each other. Therefore, it is not necessary to provide them in duplicate, so that the cost can be reduced in the equipment.
Furthermore, by storing and holding a large number of painted pencils, products can be completed simply by thermal transfer printing of various variations of patterns, so that it is possible to respond quickly to customer requests.

In addition, as shown in FIG. 1, the heading process 13 for strongly holding the pencil shaft portion 10 is performed in the pre-process of the thermal transfer printing process 15, thereby reducing the possibility that the printing surface is damaged after the thermal transfer printing. it can.

Further, as shown in FIGS. 6 and 7, the burr 32 generated in the tail portion 25 of the pencil shaft portion 10 by thermal transfer printing can be removed by cutting in the subsequent small cutting process 16. Good appearance quality can be effectively maintained.

Further, as shown in FIG. 1, by incorporating a process suitable for the thermal transfer printing process 15, the printing surface can be surely protected and the cost can be reduced while ensuring safety.

The present invention is applicable to a pencil manufacturing method in which a pencil is manufactured mainly by performing thermal transfer printing on a pencil shaft portion.

It is a process flow figure showing one embodiment of a manufacturing method of a pencil concerning the present invention. It is a perspective view which shows one Embodiment of the pencil which passed through the woodworking process which concerns on this invention. It is a perspective view which shows one Embodiment of the pencil which passed through the surrounding surface part coating process which concerns on this invention. It is a perspective view which shows one Embodiment of the pencil which passed through the heading process based on this invention. It is a perspective view which shows one Embodiment of the pencil which passed through the head coating process which concerns on this invention. It is a perspective view which shows one Embodiment of the pencil which passed through the thermal transfer printing process which concerns on this invention. It is a perspective view which shows one Embodiment of the pencil which passed through the small cut process which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pencil shaft part 11 Woodworking process 12 Peripheral surface coating process 13 Heading process 14 Head coating process 15 Thermal transfer printing process 16 Cutting process 21 Wood shaft part 22 Core part 23 Peripheral surface part 24 Head part 25 Tail part 26 Head peripheral part 27 Tail part Peripheral part 28, 29 Side part 31 Picture 32 Bali

Claims (5)

A pencil production method for producing a pencil by performing thermal transfer printing on a pencil shaft part,
A peripheral surface coating step for coating the peripheral surface portion of the pencil shaft portion, a heading step for forming the head portion of the pencil shaft portion into a hemisphere, a head coating step for coating the head portion of the pencil shaft portion, and the above A thermal transfer printing step of thermally transferring a transfer film on which the pattern is printed on the pencil shaft part and printing the pattern on the surface of the pencil shaft part,
A method for producing a pencil, wherein the peripheral surface painting step, the heading step, and the head painting step are performed in a pre-process of the thermal transfer printing step. 2. The method for manufacturing a pencil according to claim 1, wherein the head attaching step is a step of cutting the head of the pencil shaft portion to form a hemisphere. The method for producing a pencil according to claim 1 or 2, wherein a fork cutting step for forming a flat surface at a tail portion of the pencil shaft portion is performed in a subsequent step of the thermal transfer printing step. 4. The pencil manufacturing method according to claim 3, wherein the fork cutting step is a step of cutting a tail portion of the pencil shaft portion to form a flat surface. The peripheral surface painting process for painting the peripheral surface of the pencil shaft,
A heading step of cutting the head part of the pencil shaft part coated with the peripheral surface part to form a hemisphere;
A head painting process for painting the head of the pencil shaft portion on which the hemispherical surface is formed;
A thermal transfer printing step for thermally transferring a transfer film on which a pattern is printed on the pencil shaft portion on which the peripheral surface portion and the head portion are painted;
5. A pencil manufacturing method according to claim 1, further comprising a step of cutting a tail portion of the pencil shaft portion on which the peripheral surface portion and the head are painted and the pattern is thermally transferred to form a flat surface. .

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