JPH10290726A - Handle member and manufacture therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the lightweight and strong handle member of an excellent surface state. SOLUTION: This handle member is turned to an expected shape by forming a coating film by coating soft thermoplastic synthetic resin on the outer peripheral surface of a handle main body 2 by insertion molding by the injection of molten thermoplastic resin while supporting the solid handle main body 2 composed of fiber reinforced hard thermoplastic resin obtained by primary molding by a supporting part 23 provided on a die 21 for secondary molding and immovably holding it inside the die 21 and filling a part to be exposed to a surface at the time of being used as a handle among the part where the coating film is not formed generated by supporting in a secondary molding process with a filler.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handle for various kinds of furniture, doors, automobile interior parts, etc., a handle for children's equipment for preventing injuries, a handle for a baby carriage, and the like, and furthermore, indoors and outdoors in a house. The present invention relates to a handle member having high safety such as a handle for an elderly person and having utility in various fields, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Handles used for furniture, doors, and the like have heretofore been used in many cases in which all or a main part is made of metal by casting or cutting, mainly for reasons of strength. A handle including such a metal part is heavy, and it is difficult to maintain a constant surface temperature even in a soft touch or in a cold or warm temperature environment, which is complicated and expensive to manufacture. SUMMARY OF THE INVENTION The inventors of the present invention provide a synthetic resin handle obtained by first molding a handle mainly serving as a core with a hollow body of a hard thermoplastic resin, and coating the outer peripheral surface of the handle mainly with a soft thermoplastic resin by insert molding. A member and a method for manufacturing the member have been developed and applied for as Japanese Patent Application No. 7-338104.

[0003] The synthetic resin handle member according to Japanese Patent Application No. 7-338104 maintains the weight and strength of the handle by obtaining the handle main body as a core as a primary molded body made of a hollow body of a hard thermoplastic resin. This handle is excellent in that a synthetic resin handle member having a light weight and a soft touch can be obtained by coating the surface of the handle with a soft thermoplastic resin having a uniform thickness by secondary molding using an insert.

[0004]

In the handle member proposed above, there is still room for improvement in the load-bearing performance of a relatively long handle member. Based on the superior technology of Japanese Patent Application No. 7-338104, an attempt was made to obtain a handle member using a solid body of a hard thermoplastic resin by injection molding as a primary molded body. However, the solid body of the hard thermoplastic resin obtained in this way has a so-called “sink” that locally dents in the molding surface due to the thickness of the molded body, achieving the intended purpose. I couldn't.

[0005] As a result of a subsequent test study, it has been found that by mixing fibers into a hard thermoplastic resin for primary molding, the problem of "sink" can be solved at once, and at the same time, an excellent strength has been improved. A handle member having high performance can be obtained, and the handle member of the present invention and a method for manufacturing the same have been completed.

[0006]

According to a first aspect of the present invention, there is provided a solid handle main body having a predetermined shape formed of a fiber-reinforced hard thermoplastic resin. Forming a soft thermoplastic resin film on the outer peripheral surface by insert molding while supporting a predetermined portion of the obtained handle main body in the mold, of the portions without a film generated by the support in the mold, A handle member characterized in that a portion exposed on the surface when used as a handle is filled with a filler to obtain a desired shape.

According to a fourth aspect of the present invention, there is provided a primary molding step of molding a solid handle body having a predetermined shape with a fiber-reinforced hard thermoplastic resin, While supporting the part with the support part provided in the mold and holding it at a regular position in the mold, the outer peripheral surface of the handle is coated with a soft thermoplastic synthetic resin by insert molding by injection of molten thermoplastic resin. In the secondary molding step of forming a coating by coating, and among the parts where the coating is not formed due to the support of the mold in the secondary molding step, the part exposed to the surface when used as a handle is filled with a filler and finished. A method for manufacturing a handle member, comprising a finishing step.

Further, in the invention according to a fifth aspect of the present invention, both ends of the grip portion are bent to one side, and a solid handle body having a tip portion as an attachment portion is made of a fiber-reinforced hard thermoplastic resin. The primary molding step to be formed, and the thickness of the coating applied to the surface facing the mounting portion while supporting the surface facing the mounting portion of the grip portion obtained by the handle main body with the support provided in the mold. The grip main body is held in the mold so that the thickness of the film formed on the grip portion surface not facing the mounting portion side becomes thicker.
A secondary molding process in which a coating is formed on the outer peripheral surface by insert molding by injection of a molten thermoplastic resin, and a portion where a coating is not formed due to support in the secondary molding process is exposed to the surface when used as a handle And a finishing step of filling and finishing a portion to be processed with a filler.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A handle member of the present invention is obtained by molding a synthetic resin. Basically, both ends of a substantially linear or arc-shaped grip portion are bent to one side (in the same direction). A mounting seat or the like is formed at the bent end to form a mounting portion to the target surface. Such a handle member can be attached to a target surface as a single handle by itself, or can be attached to a target surface as a single handle by assembling a plurality of these members. .

In the present invention, the handle mainly comprises a solid body of a hard thermoplastic resin reinforced by fibers, and the solid body is obtained by injection molding of a fiber-reinforced hard thermoplastic resin.

In the present invention, the fiber-reinforced hard thermoplastic resin constituting the handle mainly comprises polyoxyethylene,
Various fibers such as glass fibers, carbon fibers, metal fibers, and aromatic polyamide fibers are blended in a thermoplastic resin such as polyphenylene ether, ABS resin, polypropylene, and acrylonitrile-styrene copolymer resin.

The fiber to be compounded is not particularly limited in the length of the fiber and the amount to be mixed with the resin, as long as it does not hinder the molding.
It is used by blending in a range of from 50 to 50% by weight, more preferably from 15 to 40% by weight. If the amount of fibers to be blended is less than 10% by weight, the molded article (mainly the handle) may cause sink marks, and may affect the strength of the handle. It is not preferable because it may be damaged.

In the secondary molding, the soft thermoplastic resin covering the outer peripheral surface of the handle mainly includes polyurethane thermoplastic elastomer, styrene thermoplastic elastomer, and the like.
A soft thermoplastic resin composed of various elastomers such as a polyvinyl chloride-based thermoplastic elastomer and a polyester-based thermoplastic elastomer is preferably used, and there is no particular limitation on the color.

An excellent handle member having a decorative surface can be obtained by dispersing and mixing an inorganic or organic solid powder having a color different from that of the soft thermoplastic resin in the soft thermoplastic resin used for the secondary molding. Can be. For example, in white or a light-colored soft thermoplastic resin resin close to this,
A marble-like surface obtained by mixing about 5% by weight, based on the amount of resin, of a different color to a resin such as mica (mica), for example, black or gray inorganic powder, or a different color organic powder to a resin made of cellulose. An elegant handle member having a pattern can be obtained.

Further, as another compound for the soft thermoplastic resin, a luminous agent which emits light in a dark place by irradiating light such as sunlight or artificial light is compounded, so that the presence of the handle member at night can be reduced. Recognition can ensure the safety of use.

According to the method for manufacturing a handle member of the present invention, a primary forming step of forming the main body of the handle, a secondary forming step of forming a film on the surface of the obtained main body of the handle, and embedding a filler in a portion where the film is not formed. And a finishing process. In the secondary molding, a portion where the soft thermoplastic resin film is not formed by the support of the handle main body, when used as a handle, the portion is exposed on the surface to impair the aesthetic appearance of the handle or deteriorate the tactile sensation during use. Therefore, the uncovered portion exposed on the surface during use is preferably covered with a filler made of the same material as the resin used for the secondary molding and shielded.

The portion where the coating is not formed by the secondary molding is usually formed on the surface facing the mounting portion side of the grip portion and / or the mounting portions at both ends of the grip portion. When the mounting portion is separately covered with a decorative cover or the like, it is not necessary to cover the portion with a filler.

At the time of the secondary molding, the supporting portion of the mold for secondary molding which supports the handle main body is configured to be movable forward and backward with respect to the cavity surface, and this movable supporting portion is advanced into the cavity to move the handle main body. By supporting a predetermined portion, the molten thermoplastic resin injected into the cavity retreats the tip of the support portion to the cavity surface immediately before reaching the vicinity of the support portion, so that the portion supported by the support portion can be moved to another portion. Like the part, it can be simultaneously coated with a soft thermoplastic resin. In the molding method using such a movable supporting portion, it is not necessary to cover this portion with a filler and finish the molding.

In the secondary molding step, the thickness of the cavity that does not face the mounting portion side is made larger than the thickness of the cavity that faces the mounting portion side of the grip mainly composed of a handle inserted into the secondary molding die. With this arrangement, the molten thermoplastic resin can be injected from the mounting portions on both ends to perform secondary molding.
By such secondary molding, the molten thermoplastic resin injected from the mounting portion sides at both ends of the secondary molding die flows toward the center of the grip portion, and at this time, a large thickness that does not face the mounting portion side The cavity flows smoothly by the cavity side, and the flowed molten resin presses the grip main body toward the supporting portion of the secondary molding die so that the inserted grip main body does not move into the secondary molding die. Secondary molding can be achieved with reliable support. Therefore, the film of the soft thermoplastic resin formed on the surface of the grip portion of the handle obtained by such secondary molding is a film that is less facing the mounting portion than the film facing the mounting portion as a result. A handle member having a large thickness and being softer and easier to grip when gripped can be provided.

In this case, the supporting portion of the mold for secondary molding, which supports the surface of the grip portion of the handle mainly facing the mounting portion, is a supporting portion or cavity surface protruding from the cavity surface of the mold and fixed. May be any of the support portions that can move forward and backward.

[0021]

According to the handle member of the present invention, a solid handle body having a required shape is formed by a fiber-reinforced resin in which fibers are mixed in a hard thermoplastic resin, and insert molding is performed on the outer peripheral surface of the handle body. Since the soft thermoplastic resin is covered with the resin, the handle as a synthetic resin handle can be greatly improved without the occurrence of sink marks during molding of the handle member, and the soft thermoplastic resin formed by secondary molding can be used. The resin coating eliminates slippage on the surface and has a good touch, and it is possible to obtain a gripping member that is easy to grasp and has good appearance.

The method for manufacturing a handle member according to the present invention comprises a primary molding step of molding a handle main body with a fiber-reinforced hard thermoplastic resin, and an outer peripheral surface of a specific portion of the obtained handle main body while supporting the same in a mold. A secondary molding step of forming a soft thermoplastic resin film by insert molding, and filling of the part where the film is not formed by the support mainly by the handle during this secondary molding, which is exposed on the surface during use By sequentially performing the finishing process for filling with the material, the handle main body can be formed without causing sink marks, and when forming a film on the surface of the handle main body, the main body of the handle is displaced in the mold. It is possible to easily and easily obtain a handle member which is securely and securely supported and has a uniform coating.

By blending the soft thermoplastic resin used in the secondary molding with a solid powder of a different color from the soft thermoplastic resin, a handle member made of marble-like synthetic resin can be obtained. By blending a luminous agent into the plastic resin, safety can be ensured for use at night.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below more specifically with reference to the accompanying drawings. Handle member 1 of the present invention
Is basically composed of a solid handle main body 2 and a coating 8 formed on the outer peripheral surface thereof.

The handle main body 2 has a straight grip portion 2a of a predetermined length provided with a wavy concave portion 3 for facilitating gripping by putting a finger inside, and is formed by bending both ends thereof at an angle of 90 °. Bent portions 4a and 4b and the bent portions 4
The mounting bases 5a and 5b are provided integrally with the base ends of the base members a and 4b and have a generally C-shaped planar shape. As shown in FIG. 8, the surface of the handle main body 2 on the opposite side of the wavy concave portion 3, that is, the surface of the grip portion 2a that does not face the bending side by the bend portions 4a and 4b, is formed of molten resin during secondary molding. A flat cross section is formed to improve the flow.

The base ends of the bend portions 4a and 4b and the mounting seats 5a and 5b are each provided with four triangular reinforcing ribs 6.
Are formed radially, and the mounting seats 5a, 5b
Are formed with two bolt holes 7, 7 for bolting to a surface to be mounted on a wall or the like, and the mounting seats 5a, 5b are mounted by a cover member (not shown) after mounting. Covered.

A grip portion 2a, which constitutes a solid handle body 2,
The bend portions 4a, 4b and the mounting seats 5a, 5b are all formed of a hard thermoplastic resin reinforced with glass fibers.

On the other hand, the coating 8 formed on the outer peripheral surface of the handle main body 2 is made of a soft thermoplastic resin uniformly mixed with mica black powder.
Is formed over the entire periphery of the grip portion 2a and the bend portions 4a and 4b at both ends and a part of the mounting seats 5a and 5b.

The manufacturing of the handle member 1 includes a primary forming step for forming the handle main body 2, a secondary forming step for forming the coating 8 on the surface of the formed handle main body 2, and a secondary forming step. This is achieved by the finishing step of the handle main body 2 on which the film obtained in the step is formed.

In the primary molding step, as shown in FIG. 3, the cavity 1 for molding the handle main body 2 is closed by closing.
A primary molding die 11 composed of a pair of a fixed lower die 11a that forms the second die 2 and an upper die 11b that moves up and down with respect to the lower die 11a is used.

The lower mold 11a has a wavy cavity surface for forming a horizontal lower surface of the grip portion 2a of the handle, and the center and the left and right sides thereof are provided in a secondary molding die described later. The concave part for receiving and holding the tip of the part
Are provided with three projections 13, 13 and 13. The dotted line at the center of the cavity 12 indicates the actual closing surface 15 of the lower mold 11a and the upper mold 11b, and 14 is a gate.

The upper mold 11b is lowered to close the lower mold 11a as shown in FIG. 3, and a melt of a hard thermoplastic resin containing glass fiber is injected into the cavity 12 from the gate 14 to remove the solid handle main body 2. obtain.

The handle main body 2 thus obtained maintains the desired shape without "sink" and is provided on the lower mold 11a of the mold 11 for primary molding at the center of the lower surface and on both sides thereof. The recesses 3a, 3a and 3a obtained by the projections 13, 13 and 13 respectively are formed.

After the injection resin inside the mold 11 has solidified, the mold is opened to take out the handle main body 2, and the handle main body 2 is set in the mold 21 for secondary molding.

As shown in FIG. 4, the mold 21 for the secondary molding inserts the handle main body 2 obtained by the primary molding by closing, and has a cavity 22 with a predetermined gap around it.
And comprises a fixed lower mold 21a and an upper mold 21b that can move up and down.

The lower mold 21a has a rod-shaped support portion for fitting the shallow recesses 3a, 3a, and 3a formed in the handle main body 2 to the predetermined positions in the cavity 22 so as to fit the shallow ends thereof. Gas vent holes 24, 24 are provided on both sides of 23, 23, and 23 and the central support portion 23.

The handle main body 2 in the mold 21 for secondary molding is
The left and right mounting seats 5a and 5b are supported by a mold, and the recesses 3a3a are formed by the support portions 23, 23 and 23.
And 3a, it is reliably held at a predetermined position in the cavity 22.

In holding the handle main body 2, the cavities of the grip portion 2a facing the mounting seats 5a and 5b constituting the mounting portion of the handle main body 2, that is, the handle main body 2 of FIG.
With respect to the thickness of the cavity 22a formed in the lower part of
The cavity that does not face the mounting portion side, that is, the thickness of the cavity 22b formed in the upper part of the handle main body 2 in FIG. 4 is increased. For example, the thickness of the cavity 22a is set to 2.75 mm, and the thickness of the upper cavity 22b is reduced. The thickness is 3.0 mm.

The thickness of the upper cavity 22b is
The grip portion 2a of the handle main body 2 formed by the primary molding is maintained in a state in which the cross section of the grip portion 2a that does not face the mounting portion side is flatly cut off without making the cross section of the grip portion 2a a perfect circle.

When the molten thermoplastic resin is injected from the gates 25, 25 on both sides in this manner, the resin becomes
2b, each of the supporting portions 23, 23 and 23 in which the handle main body 2 is disposed below by the flow of the molten resin.
8 and presses the handle main body 2 so as not to move during molding, thereby enabling a reliable finish. As shown in FIG. 8, the obtained handle 1 has a grip portion not facing the mounting portion side. It is possible to obtain an excellent grip body 2 that is easy to grasp and has a substantially perfect circular shape with a thick coating 8 of 2a.

The secondary molding die 21 thus configured
A melt of a soft thermoplastic resin in which 5% by weight of mica powder is uniformly mixed with respect to the amount of resin is injected from the gates 25, 25 on both sides into the cavity 22, and the outer periphery of the handle main body 2 is inserted by insert molding. The coating film 8 of the soft thermoplastic resin containing mica is formed.

After the end of the injection molding, the handle main body 2 on which the coating 8 taken out by opening the mold is formed, the concave portions 3a, 3a formed on the left and right mounting seats 5a, 5b and the grip portion 2a are formed. Although no coating is formed on the portion 3a, the left and right mounting seats 5a and 5b are covered by covers (not shown) during normal use, so that it is not necessary to separately fill them with a filler. Therefore, in the finishing step, only the recesses 3a, 3a and 3a
By filling the mixture with a filler of a soft thermoplastic resin mixed with mica powder of the same kind as above, it is possible to obtain the entire marble-like handle member 1 in which mica powder is dispersed on the surface.

In the above-mentioned secondary molding, for example, a movable portion is provided at a required portion of the lower die 21a corresponding to the central portion of the grip portion 2a of the die 21 for secondary molding,
The support portion 23a is advanced from the surface of the cavity 22a to support the handle main body 2, and the molten thermoplastic resin injected into the cavity 22 of the mold 21 for secondary molding is used as the support portion 23a.
Immediately before reaching the vicinity of a, as shown in FIG.
The recess 8a supported by the support portion 23a of the handle main body 2 is covered with a soft thermoplastic resin as shown in FIG.
In this case, a finishing step for finishing with a filler is not required.

As shown in FIG. 7, the handle main body 2 having a flat surface is obtained without forming the concave portion 3a in the handle main body 2, and the movable body similarly provided at the central portion of the grip portion 2a is provided. The support portion 23a is advanced to support its surface,
Immediately before the injected molten resin reaches the vicinity of the support portion 23a, the tip can be set back to the surface of the cavity 22a and coated, thereby obtaining a secondary molded body that does not need to be finished with a filler. . In addition, by blending the luminous agent into the soft thermoplastic resin for the secondary molding, it is possible to obtain a handle member that is easily visible at night.

[0045]

According to the handle member of the present invention, a solid handle body is formed by blending fibers in a hard thermoplastic resin, and a soft thermoplastic resin film is formed on the outer peripheral surface of the handle body by insert molding. Since the handle member is formed, the fiber mixed with the hard thermoplastic resin does not have a characteristic "sink" at the time of molding when forming the handle member.

The method for manufacturing a handle member according to the present invention comprises a primary molding step of obtaining a solid handle body made of a fiber-reinforced hard thermoplastic resin, and a molding process of a soft thermoplastic resin by insert molding on the outer peripheral surface of the obtained handle body. By successively performing a secondary forming step of forming a coating and a finishing step for filling a portion where the coating could not be formed in the secondary forming step with a filler, without causing so-called "sink" A handle having a required shape can be reliably obtained, and when forming a film on the surface of the handle, the film can be reliably formed on the handle without being affected by the molten resin.

In particular, in the present invention, the main body of the handle is supported in the mold for secondary molding during the secondary molding for forming the coating, so that the main body of the handle does not move in the mold.
Smooth the flow of molten resin injected into the cavity,
Since the secondary molding can be performed in a stable state, a well-shaped handle member can be easily and easily manufactured.

In the secondary molding, a handle member having a marble-like surface can be obtained by mixing a solid powder of a different color with the soft thermoplastic resin to be used. Can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of a handle member of the present invention.

FIG. 2 is a partially cutaway plan view of the handle member of FIG. 1;

FIG. 3 is a longitudinal sectional view of a mold used for primary molding of the handle member of FIG.

FIG. 4 is a longitudinal sectional view of a mold used for secondary molding of the handle member of FIG.

FIG. 5 is a partial longitudinal sectional view showing another embodiment of the secondary molding.

FIG. 6 is a partial longitudinal sectional view showing a state after injection molding in FIG. 5;

FIG. 7 is a partial vertical sectional view showing still another embodiment of the secondary molding.

FIG. 8 is a sectional view taken along line AA of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Handle member 2 Handle main body 2a Handle part 3 Recess 5a, 5b Mounting seat 8 Coating 11 Primary molding die 12, 22 Cavity 13, Projection 21 Secondary molding die 23 Supporting part

Claims (8)

[Claims] A solid handle main body having a predetermined shape is formed by a fiber-reinforced hard thermoplastic resin, and a predetermined portion of the obtained handle main body is supported by a mold in a mold, and a soft outer peripheral surface is formed by insert molding. A film of a thermoplastic resin is formed, and among the portions without a film generated by the support in the mold, a portion exposed to the surface when used as a handle is filled with a filler to have an intended shape. A handle member characterized by the above-mentioned. 2. The film according to claim 1, wherein the coating is formed by dispersing a different color powder in a soft thermoplastic resin.
A handle member according to claim 1. 3. The handle member according to claim 1, wherein the coating contains a luminous agent. 4. A primary molding step of molding a solid handle main body having a predetermined shape with a fiber-reinforced hard thermoplastic resin, and supporting a predetermined portion of the handle main body with a support provided on a mold. A secondary molding step in which the outer peripheral surface of the handle is coated with a soft thermoplastic synthetic resin by insert molding by injection of a molten thermoplastic resin to form a coating film while being held at a regular position in the mold. A gripping member comprising a step of burying a portion exposed on the surface when used as a handle with a filler in a portion where a film formed by supporting the mold in the next molding step where the coating is not formed is finished. Manufacturing method. 5. A primary molding step in which both ends of a grip portion are bent to one side, and a solid handle body having a tip thereof as an attachment portion is formed of a fiber-reinforced hard thermoplastic resin. A cavity that supports the surface of the grip facing the mounting portion with the support provided on the mold and that does not face the mounting portion with respect to the thickness of the cavity of the mold facing the mounting portion of the grip. While holding the handle member in the mold so as to increase the thickness of the mold, a secondary molding step of forming a film on the outer peripheral surface by insert molding by injection of a molten thermoplastic resin,
A finishing step of burying a part exposed on the surface when used as a handle in a part where a film formed by the support in the secondary molding step is not formed with a filler to finish the processing; Method. 6. In the secondary molding step, a support portion of a mold for supporting the handle main body is configured to be movable forward and backward with respect to a cavity surface, and a predetermined portion of the handle main body is advanced by moving the support portion into the cavity. By supporting the part, the molten thermoplastic resin injected into the cavity is retracted to the cavity surface just before the molten thermoplastic resin reaches the support part, so that the surface of the handle mainly supported by the support part is made of the soft thermoplastic resin. 5. Coating simultaneously with other parts by using
Or the manufacturing method of the handle member of 5. 7. The soft thermoplastic resin according to claim 4, wherein a powder of a different color is dispersed.
The method for manufacturing a handle member according to any one of the above. 8. The method according to claim 4, wherein the soft thermoplastic resin contains a luminous agent.