JPH0598528A - Production of fiber processed body for liquid feed - Google Patents

Abstract

PURPOSE:To obtain the uniform subject processed body uniformed in a crimped state by heat-treating and forming a fiber cluster kept in a state stretched in the longitudinal direction when the fiber cluster is wound around a bobbin in a crimped state, suppressed in the direction of diameter and kept in a loaded state. CONSTITUTION:When a fiber cluster in a longitudinal direction previously prepared is passed through a forming die 3 and a fiber processed body 1 for liquid feed having desired diameter is produced by resin finishing and melt forming, the fiber cluster 2 consists of a crimped fiber subjected to crimping and is prepared in a state wound around a bobbin 9 or superposed in a case, etc., and a heat treating process (B) by a heating box 4 or a non-heat treating process (C) is provided as a preliminary process of a forming process (A) so as to return the crimped state of the fiber cluster 2 suppressed in the direction of diameter and kept in load form and simultaneously stretched in the longitudinal direction in an original state or so as to homogenize the crimped state in an arbitrary objective value to give the objective fiber processed body for liquid feed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber processed body for supplying liquid. More specifically, the pen of the writing instrument,
The present invention relates to a method for producing a coated member of various applicators, an occlusion body of a liquid such as ink, a coating liquid, a cosmetic liquid, a drawn-out body of the above-mentioned various liquids, and the like, which is a fiber-processing body for liquid supply.

[0002]

2. Description of the Related Art Fiber aggregates in the longitudinal direction [for example, parallel fiber bundles (tows) of crimpable fibers, bundles (sliver) of crimpable short fibers, crimped processed yarns, crimpable filament yarns] ,
Etc.], the resin processing or the melt processing by passing through a molding die to successively produce a liquid-supplying fiber-processed body having a large number of capillary gaps between fibers, and several proposals have been made. It is disclosed (Japanese Patent Publication No. 3-6920, etc.).

[0003]

When mass-producing the above-described liquid-supplied fiber assembly, the fiber assembly in the longitudinal direction is prepared in a stock state in advance, and is continuously produced from one end of the fiber assembly during manufacturing. And then supplied to the molding process. Usually, the above-described fiber assembly is stocked in a state of being wound in a bobbin, housed in a case in a bale state, and stacked in a wound form. Therefore, the fiber assembly is subjected to some uneven load that impairs the degree of crimp set at the time of fiber production or impairs the homogeneity of the crimp. This is a major obstacle in forming a homogeneous and highly voidy capillary gap between the fibers. Further, it also causes a variation in the outer diameter of the molded product. The present invention eliminates the above-mentioned inconvenience by a relatively simple means, and enables arbitrary crimp ratio control,
An object of the present invention is to disclose a method for producing a fiber-fabricated body for liquid supply which satisfies all of quality, performance and productivity.

[0004]

A manufacturing method according to the present invention will be described with reference to the drawings (see FIGS. 1 to 5). The production method of the present invention is a step in which a fiber assembly in the longitudinal direction prepared in advance is passed through a molding die, and a liquid supply fiber processed body having a desired outer diameter is successively produced by resin processing molding or melt processing molding. The fiber assembly 2 is composed of crimped fibers that have been subjected to crimping, and the fiber assembly 2 is prepared by being wound around a bobbin or stacked in a case or the like, and is in the loaded state. The heat treatment step B or the non-heat treatment step C for suppressing the body 2 and restoring the stretched crimpability to the original state or homogenizing the crimpability to an arbitrary target value is performed as a pre-step of the molding step A. It is characterized by being provided. Further, in the heat treatment step B, a heating box 4 for passing the fiber assembly 2 in a longitudinal direction and a radial direction with no load or a low load, or a heat treatment die having an inner diameter equal to or larger than that of the molding die 3. It is characterized by having 5. Further, the fiber state and outer diameter of the processed body can be adjusted by changing the temperature and load state of the heat treatment die 5, and in the heat treatment step B, the heat treatment step B is arranged in the vicinity of the front side in the axial direction of the molding die 3. And the movable dimension adjusting die 7 is passed through the movable dimension adjusting die 7. The movable dimension adjusting die 7 is arranged so as to be movable in the axial direction, and the outer diameter of the molded body is adjusted by moving the movable dimension adjusting die 7 in the axial direction. In the non-heat treatment step C, the shaping die 6 in the non-heated state is arranged in the pre-step of the heat treatment die 5 or the pre-step of molding by the molding die 3. When the fiber aggregate 2 is passed through the shaping die 6 and pinched while the impact resilience of the individual fibers is relatively strong, the individual fibers are uniformly imparted with the radial elasticity of the individual fibers remaining. Characterized by shaping .

In the above, the longitudinal fiber assembly 2
Examples thereof include a parallel fiber bundle (tow) of crimpable fibers, a bundle (sliver) of crimpable short fibers, a crimpable processed yarn, a crimpable filament yarn, and the like. The fiber assembly 2
Is a state in which it is wound around the bobbin 9, a state in which it is stacked in a spiral shape,
It is prepared in a bale state (a state in which tow-shaped fibers are deposited) or the like, is supplied from one end to a take-up molding process, is continuously taken up by a take-up device 8, and is a target liquid by resin processing or melt-forming. The fiber processing body 1 for supply is obtained.

Specific examples of the obtained liquid-supplied fiber-processed body 1 include a writing or coating tip member, a writing or coating liquid occlusion body, a liquid discharge body, and the like. The liquid-supplying fiber-processed body 1 is a porous body having a large number of capillary gaps formed between fibers, and is held at a predetermined outer diameter.

In the molding step A, the outer shape of the molded body is formed,
Resin processing molding or melt processing molding [peripheral part of fiber bundle is heat-welded to a predetermined outer diameter or heat-weldable fiber (composite fiber,
Low melting point fibers, etc.) Welding at intersections with each other.

In the heat treatment step B or the non-heat treatment step C,
It is provided as a pre-step of the molding step A and constitutes the requirement of the present invention, and the crimpability of each fiber of the fiber assembly 2 made of fibers having crimpability is set as an arbitrary target. The value is in a homogeneous state, the crimping effect of individual fibers is effectively exhibited, and it contributes to obtaining the liquid-supplying fiber-processed body 1 having a desired fiber state and outer diameter.

[0009]

In the heat treatment step B, in the system equipped with the heating box 4 (see FIG. 3), the fiber aggregate 2 is passed through the heating box 4 to crimp the individual fibers suppressed and stretched. The state is heated and released to return to the original state (original crimpability formed during crimping of the fiber) or the crimpability is brought to a homogeneous state with an arbitrary target value, and the molding step A is conducted.

Further, in the system in which the heat treatment die 5 is arranged, by passing through the die 5, the alignment properties, crimpability, etc. of the individual fibers constituting the fiber assembly 2 are preliminarily matched to each other in the molding step. And effectively functions to homogenize the molded body. Furthermore, by adjusting the temperature and load condition of the heat treatment die 5, it becomes possible to adjust the fiber condition and outer diameter of the molded product (see FIGS. 3 and 4).

As the heat treatment step B, in the system in which the movable dimension adjusting die 7 is arranged (see FIG. 5), the outer diameter of the molded body molded by the molding die 3 is slightly changed by the axial movement of the die 7. The adjustment die 7
May be in a heated state or in a low temperature state, and has the function of the thermoforming die 5 in the heated state). Traditionally,
When manufacturing a fiber processed body using this type of fiber assembly 2, due to subtle fluctuations in the fiber characteristics, temperature and humidity of the manufacturing chamber, processing accuracy of the molding die 3, temperature of the heater, etc. The outer diameter fluctuated, the molding die 3 was replaced at the time of molding, and the outer diameter dimension was forced to be adjusted by trial and error. However, by applying the movable dimension adjusting die 7 according to the present invention, The conventional problems of replacing the molding die 3 by interrupting the molding process are solved all at once.

In the system in which the shaping die 6 is arranged as the non-heat treatment step C (see FIG. 4), the fiber assembly 2 is compressed under the condition that the impact resilience of the individual fibers is relatively strong. , The fibers are aligned in a state where the radial repulsion force of the individual fibers is left, and the fibers are guided to the next step to obtain a homogenous porous body. The shaping die 6 has a function of pressing in the radial direction, including molding of the outer shape of the molded body.

Example 1 (see FIGS. 1 and 3) A fiber assembly 2 formed by combining 23 crimped textured yarns (300D-60 filaments) of polyester fiber is wound on a bobbin, and the fiber assembly is formed. The body 2 is passed through a heating box 4 (a space that does not apply a radial load to the fiber assembly 2; a space that maximizes crimpability is provided: a temperature of about 110 ° C.), and a heat treatment die 5 is formed. (Ring heater 51 is arranged around: inner diameter of die 1.7 mm
Φ: die temperature of about 220 ° C), outer diameter 1.6m
An original bar to be used as an ink lead-out body for a writing instrument was manufactured by shaping it into mΦ and subjecting it to resin processing.

Example 2 (see FIGS. 2 and 4) Using the fiber assembly 2 of Example 1, a shaping die 6 (inner diameter 4 mmφ), a heat treatment die 5 (inner diameter 3.
3 mmφ: temperature 100 ° C., molding die 3 (inner diameter 1.7)
(mmΦ: temperature 220 ° C.) were sequentially arranged, drawn in the axial direction, and subjected to resin processing to manufacture a raw bar to be used as a tip member for an applicator.

Example 3 (see FIGS. 2 and 4) Sliver made of polyester fiber (5.8 g / m)
Shaped die 6 (inner diameter 7.2m)
mΦ), heat treatment die 5 (inner diameter 5.8 mmΦ: 150
C.) and molding dies 3 (inner diameter 4.2 mmφ: 230 ° C.) are sequentially arranged in the same manner as in Example 2, and are taken out in the axial direction and resin processed to produce a raw bar to be used as an ink occlusion body with an outer diameter 4 mmφ. did.

Example 4 (see FIG. 5) Using the fiber assembly 2 of Example 1, a movable dimension adjusting die 7 was used.
(Inner diameter 3.3 mmφ, total length 6 cm: temperature about 105 ° C.),
Molding die 31 (inner diameter 2.0 mmφ: temperature about 210
℃), molding die 3 (inner diameter 1.7 mmΦ: temperature about 210)
C.), shaped into an outer diameter of 1.6 mmΦ, processed with resin, and when manufacturing a raw bar to be used as an ink lead-out member for a water-based ballpoint pen, the movable dimension adjusting die 7 is moved forward and backward in the axial direction. By operating (moving in the direction of the molding die 31 in the forward direction and moving in the opposite direction as the backward direction, the diameter is reduced in the backward direction), the outer diameter is adjusted, and the original diameter of the desired diameter is adjusted. Manufactured sticks.

[0017]

EFFECT OF THE INVENTION In the production method of the present invention, the heat treatment step B is performed in producing the liquid-supplying fiber-processed body 1 using the fiber assembly 2 made of the crimpable fibers crimped as described above. Alternatively, by providing the non-heat treatment step C as a pre-step of the molding step A, the suppression of the prepared fiber assembly 2, the expanded crimpability is returned to the original state, or the crimpability is set to an arbitrary target. Can be homogenized with a predetermined value and supplied to the molding step A in series, and is homogeneous and porous, and has no variation in outer diameter dimension, a writing or coating tip member, a writing or coating liquid occlusion body, and derivation of the liquid. It is possible to manufacture the liquid-supplied fiber-processed body 1 effective as a body.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a manufacturing process according to the method of the present invention.

FIG. 2 is an explanatory view showing an example of a manufacturing process according to the method of the present invention.

FIG. 3 is a vertical cross-sectional explanatory view of an example of a manufacturing process according to the method of the present invention.

FIG. 4 is a vertical cross-sectional explanatory view of another embodiment of the manufacturing process according to the method of the present invention.

FIG. 5 is a vertical cross-sectional explanatory view of another embodiment of the manufacturing process according to the method of the present invention.

[Explanation of symbols]

 1 Fiber Supply Body for Liquid Supply 2 Fiber Assembly 21 Crimping Processed Part 3 Molding Die 31 Molding Die 32 Heater 4 Heating Box 5 Heat Treatment Die 51 Heater 6 Shaped Die 7 Adjustable Dimension Adjusting Die 8 Bobbin A Forming Process B Heat treatment process C Non-heat treatment process

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location // B05C 17/00 6804-4D

Claims (5)

[Claims] 1. A process in which a fiber assembly in the longitudinal direction prepared in advance is passed through a molding die to successively produce a fiber-processing body for liquid supply having a desired diameter by resin processing molding or melt processing molding. The body 2 is made of crimped fibers, and the fiber assembly 2 is a bobbin 9
It is prepared in a wound state or stacked in a case etc.,
In order to restore the crimpability of the fiber assembly 2 in the loaded state while being suppressed in the radial direction and in the stretched state in the longitudinal direction to the original state or to homogenize the crimpability to an arbitrary target value. The method for producing a fiber-fabricated body for liquid supply 1, characterized in that the heat treatment step B or the non-heat treatment step C is provided as a step before the molding step A. 2. The heat treatment step B is an inner diameter equal to or larger than the inner diameter of the heating box 4 or the molding die 3 for passing the fiber assembly 2 in the longitudinal direction and the radial direction with no load or a low load. The method for producing the liquid-supplied fiber-processed body 1 according to claim 1, further comprising a heat treatment die 5 having the above. 3. The liquid-supplying fiber processed body 1 according to claim 2, wherein the fiber state and the outer diameter of the liquid-supplying fiber processed body 1 can be adjusted by changing the temperature and the load state of the heat treatment die 5. Production method. 4. The heat treatment step B comprises a step of passing a movable dimension adjusting die 7 which is disposed close to the front of the molding die 3 in the axial direction, and the movable dimension adjusting die 7 is arranged so as to be movable in the axial direction. 2. The method for producing a liquid-supplied fiber-working body 1 according to claim 1, wherein an outer diameter dimension of the liquid-supplying fiber-processing body 1 to be molded is adjustable by axially moving the movable dimension adjusting die 7. .. 5. The non-heat treatment step C comprises placing a shaping die 6 in a room temperature range in a front step of the heat treatment die 5 or a front step of the molding die 3 so that the individual fibers of the fiber assembly 2 A step of forming the fiber aggregate 2 in a state in which the elastic properties of the individual fibers are retained by pressing the fiber assembly 2 through the shaping die 6 with a relatively high impact resilience is provided. A method for manufacturing the liquid-supplied fiber-processed body 1 according to claim 1.