KR100853268B1 - Method for manufacturing synthetic resin pen-handle having the texture of wood - Google Patents

Abstract

A method for manufacturing a synthetic resin pen-handle representing the texture of wood is provided to improve an aesthetic appearance of the synthetic resin pen-handle by extruding the pen-handle having a desired section after compounding hard PVC synthetic resin powder, foaming agent, stabilizer and pigment. A method for manufacturing a synthetic resin pen-handle representing the texture of wood comprises the steps of mixing ingredients, dissolving the mixed ingredients at 100 to 300°C, compounding the dissolved ingredients in an extrusion-calendar forming manner, continuously extruding the mixed ingredients, and cooling the product obtained through the extruding process. In the step of mixing the ingredients, rigid PVC powder of 85 to 92 weight %, foaming agent of 1 to 1.5 weight %, stabilizer of 6 to 13 weight %, and pigment of 0.2 to 0.5 weight % are mixed with each other.

Description

Method for manufacturing synthetic resin pen shaft for writing instruments molded to have the texture of wood {Method for manufacturing synthetic resin pen-handle having the texture of wood}

The present invention is to produce a pen shaft of a ballpoint pen or mechanical pencil using a synthetic resin, in particular, a hard powder form of PVC, a blowing agent, a stabilizer and a pigment is mixed and compounded by extrusion calendering method according to the desired cross-sectional shape By extruding into the shape of a pen shaft, a soft feel as well as an extremely light weight can be obtained by the foamed PVC synthetic resin, and the feel, color and texture of the foam surface and mixed pigments almost similar to wood. The present invention relates to a method of manufacturing a synthetic resin pen shaft, which can produce a natural texture of wood while improving the durability of the pen shaft by synthetic resins, thereby greatly extending its service life.

Commonly used writing instruments include pencils, mechanical pencils, and ballpoint pens (the ballpoint pen here is not limited to the kind of writing instruments that allow ink to flow out through a rotating ball, but refers to a writing instrument using ink inclusively). .) Or sign pens are commonly used.

At this time, the pencil is to insert and fix the pencil lead made of graphite in the longitudinal direction of the natural wood in the longitudinal direction to use the sharp pencil, the pencil is a thin pencil lead can be automatically drawn out by the pencil unit, ball pen or A signature pen is made to use ink stored in the nib through a ball or a hard nib.

In addition, ball-point pens or mechanical pencils are obtained by extruding pipe shafts in the form of circular or hexagonal octagons in cross-section and post-processing to suit the characteristics of various ball-point pens, and assembling the ball-point pen units according to their characteristics. Thickness and color are to be determined.

Such pencils and ballpoint pens are mostly limited in structure and characteristics within a limited range, and consumers are eating from such a uniform characteristic or design.

Accordingly, in recent years, pencils and ballpoint pens have been highly valued by consumers for making pencils with a luxurious wooden texture. This type of writing instrument utilizes the pen shaft of wooden pencils. Therefore, it has a shape that is manufactured by combining a mechanical pencil unit or a ballpoint pen unit.

That is, after the pencil shaft of the pencil is removed or the pencil core without the pencil core is made in the state that the post-processed to meet the characteristics of the mechanical pencil or ballpoint pen unit to produce it as a pencil or ballpoint pen In addition to creating a luxurious texture, the pencil or ballpoint pen has an aesthetic similar to that of a pencil, thus attracting consumers' attention and creating a unique and simple design.

However, in the case of the pencil or ballpoint pen using the pen shaft of the wooden pencil as described above, the durability of the wood is very low and the service life of the pencil is extremely uneconomical.The pencil shaft is made of wood as described above, so it is relatively expensive. The cost of the raw material will be required, and the weight of the wood and the weight of the pencil or ballpoint pen unit are added together to become a relatively heavy state there is a problem that the ease of use is reduced.

In other words, the wood for making a pencil is usually used cedar or pencil-scented wood. Such wood is characterized by light, dense and beautiful wood grain pattern. However, such a pencil wood is extremely inferior in durability as in the general characteristics of wood, the process for combining the pencil unit or ballpoint pen unit with such a pencil axis is extremely difficult.

Accordingly, the pencil or ball pen, which is mostly produced using the pencil shaft, is forcibly assembled by inserting these units into the insertion hole of the pencil shaft, and the pencil pencil unit or the ball pen unit is forced by using the predetermined elasticity of wood. I'm taking a way to be fixed.

Therefore, the mechanical pencil and the ball pen assembled above have the problem that the assembly part is easily opened or extended by the user's force, and thus the service life is extremely short. In case of using force or applying excessive pressure, the wooden pen shaft is broken or deformation of the fastening part occurs, which is no longer usable, which is very uneconomical.

In particular, writing instruments such as mechanical pencils and ballpoint pens, which are made of wooden pencil shafts, can only be applied in a limited form and configuration due to the nature of wood, which is extremely inferior in processability. It is high that both producers and buyers do not get satisfactory results.

The present invention has been made to improve the problems as described above, by mixing a hard PVC synthetic resin powder, a blowing agent, a stabilizer and a pigment and compounding them in an extrusion calender method and then extruded a pen shaft having a desired cross-sectional shape It is possible to obtain a pen shaft expressing the texture of wood as it is, and can be produced and used as a writing instrument such as a pencil pencil or a ball pen through the post-processing process of the pen shaft, and a synthetic resin pen for writing instruments that overcomes the problems of conventional writing instruments It is an object of the present invention to provide a method for manufacturing a shaft.

The manufacturing method of the synthetic resin pen shaft for writing instruments molded to have the texture of wood of the present invention as described above, while the lightweight pen shaft can be obtained by the foamed PVC synthetic resin material, the surface texture and color of the wood through the foam surface and the color of the pigment The extrusion calender molding method enables the smooth surface and the wood grain pattern to be produced. Therefore, the sharp pencil unit or the ballpoint pen unit can be used due to the hardness and excellent durability of the cured synthetic resin while maintaining the feeling of luxury wood. It can be tightened firmly, which can greatly extend its service life.

In addition, since it is extruded in large quantities by PVC synthetic resin instead of wood, which requires expensive raw material costs, it is possible to obtain economic benefits due to cost reduction, and it is excellent in processability and can produce various kinds of writing instruments. To get the effect.

Hereinafter, preferred embodiments of the present invention will be described.

1 is a manufacturing process diagram of a synthetic resin pen shaft for writing instruments according to the present invention, Figure 2 is a perspective view of a synthetic resin pen shaft for writing instruments completed through the manufacturing method according to the present invention.

Synthetic resin pen shaft for writing instruments according to the present invention, first, to perform a raw material mixing process of mixing 85-92% by weight of hard PVC powder, 1-1.5% by weight of foaming agent, 6-13% by weight of stabilizer and 0.2-0.5% by weight of pigment. do.

Here, the hard PVC powder has excellent durability, chemical resistance, and physical strength, and has excellent moldability and light characteristics.
In particular, the above-mentioned hard PVC powder, P-450, P-700, P-800 grade of the PVC items should be used because the bending property does not occur due to the characteristics of the pen holding pressure, not necessarily soft PVC powder PVC powder should be used.

The foaming agent mixed with the PVC powder causes the above-mentioned PVC powder to be foamed during the molding process and the mixing process. The fine bubbles by foaming form fine pores on the surface of the extruded molding, similar to the pores of the wood. It is to produce the surface of, and to have a lighter weight of the extruded pen shaft.

In addition, stabilizers are used for the purpose of enhancing the activity and heat stability and durability of the raw materials, commonly used dioctyl phthalic (Douctyl Phthalic) or tribasic lactate (TLS; linked stabilizer for PVC; Youngbu Chemical) Use or dibasic lead acid stearate (DBL; thermal stability and electrical insulation and durability; zero chemical) or calcium stearate (activator of resin processing; zero chemical) or stearic acid lead (PB-ST; excellent activity and thermal stability; zero chemical) Or stabilizers based on any one of hard coal (calcium carbonate; Omia Korea) or mixtures thereof.

In addition, the pigment used in the mixed raw material is to determine the color of the pen shaft, it is to determine the various colors of the wood according to the characteristics of the pigment.

The raw material dissolution process is performed to dissolve such mixed raw materials under the conditions of 100 to 130 ° C. The raw compound compounding process of uniformly mixing the dissolved mixed raw materials by extrusion calender molding is performed. The pigment in the found raw material is not melt-blended in the raw material, but exhibits an upper phase such as kneading in a linear form through extrusion calender molding. Thus, the pigment in the linear form is like a ring of wood. The expressive power will be produced.

The compounded raw materials may be continuously molded using an extrusion mold having various cross sections. The pen shafts of various shapes such as circular or triangular, square, pentagonal, hexagonal, octagonal, elliptical, etc. may be formed according to the cross-sectional shape of the desired pen axis. It can be extrusion molded.

The pen shaft to be extruded in this way is to complete the pen shaft 10 for writing instruments through a cooling process, it is possible to manufacture a variety of writing instruments, such as a pencil pencil or ball pen using the pen shaft.

That is, by adding a separate post-processing process using the pen shaft 10 formed as described above as shown in the manufacturing process of Figure 3 can be produced with a ballpoint pen, the tapping process to the inside of the lower end of the pen shaft 10 As shown in FIG. 5, the ball pen unit is fastened to the inside of the front end thereof through the screw part 11 and the expansion part 12 formed thereon as shown in FIG. 4. The ballpoint pen 20 using the pen shaft 10 is completed.

At this time, the surface of the pen shaft 10 can be produced a more beautiful ball pen by additionally performing a transfer printing process that can produce a variety of colors as well as a variety of patterns.

In addition, as shown in the process diagram of FIG. 6 and the cross-sectional view of FIG. 7, a stepping process is performed in which the threaded portion 11 is formed on the inner side of the lower end of the pen shaft 10, and the chamfered portion 13 is formed on the outer side of the lower end. After performing one chamfering process, when the screw is coupled to a known mechanical pencil unit using the screw unit 11, the mechanical pencil 30 as shown in FIG. 8 is completed.

In this case, by performing a transfer printing process on the surface of the pen shaft 10, it is possible to produce a variety of colors and patterns, it is possible to manufacture a pencil having a beautiful decorative effect.

Therefore, the pen shaft according to the present invention is manufactured by a synthetic resin material, and due to the rigidity or durability of the synthetic resin, the product rate is greatly improved, and the defect rate is greatly reduced, and thus it is very economical, and firm coupling with the pencil unit and the ball pen unit By greatly extending the service life of these, it is easy and easy to assemble and dismantle the various units and pen shafts, and it is very convenient to change or replace or replace parts.

1 is a manufacturing process of the synthetic resin pen shaft in accordance with the present invention

Figure 2 is a perspective view of a synthetic resin pen shaft completed through the manufacturing method according to the present invention

Figure 3 is a manufacturing process for applying the pen shaft completed through the manufacturing method according to the present invention as a bullpen

4 is a perspective view of a ballpoint pen completed by the manufacturing process of FIG.

5 is a manufacturing process diagram for applying a pen shaft completed through the manufacturing method according to the present invention as a mechanical pencil

6 is a perspective view of a mechanical pencil completed by the manufacturing process of FIG.

Explanation of symbols on the main parts of the drawings

10 pen shaft 11: screw portion

12: expansion portion 13: chamfering

20: ballpoint pen

30: mechanical pencil

Claims (6)

85 to 92% by weight of hard PVC powder hardly bent in the molded state, 1 to 1.5% by weight of blowing agent for reducing the molding weight of hard PVC, and stabilizer 6 to 13 to improve foam formability of the hard PVC A raw material mixing step of mixing the wt% and 0.2 to 0.5 wt% of the pigment for expressing the texture of the wood; A raw material dissolving step of dissolving the mixed raw materials in the above process as it is in a mixed state at 100 to 130 ° C .; Compounding the raw material by the extrusion calender molding method in which the pigment in the dissolved mixed raw material is seen in a linear form; An extrusion molding process in which the pigment of the mixed raw material is seen in a linear form and continuously extruded; A method of manufacturing a synthetic resin pen shaft for writing instruments molded to have a texture of wood, characterized in that the pen shaft for writing instruments is completed through a cooling process of cooling the extruded molding. The method of claim 1, Manufacture of synthetic resin pen shafts for writing instruments, which are molded to have the texture of wood, by adding a transfer printing process performed on the outer surface of the pen shaft completed through the cooling process to produce various colors or patterns on the outer surface of the pen shafts. Way. The method of claim 1, After performing the tapping process of forming a screw thread inside the lower end of the completed pen shaft through the cooling process, and the expansion process of forming an expansion portion inside the tip of the pen shaft, and then through the screw portion and the expansion process formed by the tapping process A method of manufacturing a synthetic resin pen shaft for writing implements, which is formed to have a texture of wood, by assembling a known ball pen unit to a pen shaft by using the expanded portion formed. The method of claim 1, After performing the tapping process of forming a screw thread inside the lower end of the pen shaft completed through the cooling process, and performing a chamfering process to form a slanted chamfering portion outside the lower end of the pen shaft, by using the screw formed by the tapping process A method of manufacturing a synthetic resin pen shaft for writing implements, which is molded to have a texture of wood, by assembling a known mechanical pencil unit to a pen shaft, thereby completing a mechanical pencil made of a synthetic resin pen shaft. The method of claim 1, Pen shaft is a synthetic resin pen shaft for writing instruments molded to have a wood texture, characterized in that the cross-sectional shape of any one of a circular or triangular or square, pentagonal, hexagonal, octagonal, elliptical in shape. The method of claim 1, The stabilizer is any one of dioctyl phthalic or tribasic lactate (TLS) or dibasic stearic acid lead (DBL), calcium stearate (CA-ST) or lead stearate (PB-ST), and hard coal (calcium carbonate). Or a method for producing a synthetic resin pen shaft for writing implements, which is molded to have a texture of wood, characterized in that it consists of at least two of these mixtures.

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