KR20170038353A - plastic hardness bolt and method of manufacturing the plastic hardness bolt - Google Patents

plastic hardness bolt and method of manufacturing the plastic hardness bolt Download PDF

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Publication number
KR20170038353A
KR20170038353A KR1020150137623A KR20150137623A KR20170038353A KR 20170038353 A KR20170038353 A KR 20170038353A KR 1020150137623 A KR1020150137623 A KR 1020150137623A KR 20150137623 A KR20150137623 A KR 20150137623A KR 20170038353 A KR20170038353 A KR 20170038353A
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KR
South Korea
Prior art keywords
bolt
pin
center pin
center
plastic
Prior art date
Application number
KR1020150137623A
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Korean (ko)
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KR101775003B1 (en
Inventor
박준철
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박준철
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Publication date
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Priority to KR1020150137623A priority Critical patent/KR101775003B1/en
Publication of KR20170038353A publication Critical patent/KR20170038353A/en
Application granted granted Critical
Publication of KR101775003B1 publication Critical patent/KR101775003B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14467—Joining articles or parts of a single article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D1/00—Producing articles with screw-threads

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The present invention discloses a plastic rigid bolt, and a manufacturing method thereof. The plastic rigid bolt of the present invention comprises: a metallic reinforcement pin positioned on an inner center of a plastic rigid bolt; a first center pin coupled to a first end portion of the metallic reinforcement pin, and configured to prevent the metallic reinforcement pin from being exposed; a second center pin coupled to a second end portion of the metallic reinforcement pin configured to prevent the metallic reinforcement pin from being exposed; and a bolt-type plastic body housing the first center pin, the metallic reinforcement pin, and the second center pin in a center portion thereof while exposing an end surface of the first center pin and an end surface of the second center pin. As such, the present invention is able to have a structure being capable of more easily positioning a metallic reinforcement pin on a center portion of a plastic bolt to accordingly be manufactured, as well as reinforcing rigidity of the plastic bolt; and at the same time, preventing corrosion of the metallic reinforcement pin, thus improving a lifespan of the bolt.

Description

TECHNICAL FIELD [0001] The present invention relates to a plastic rigid bolt and a method of manufacturing the plastic rigid bolt,

The present invention relates to a plastic rigid bolt and a method of manufacturing the same, and more particularly, to a method of manufacturing a plastic rigid bolt by injection molding so that the metal reinforcing fin is not exposed to the plastic rigid bolt and the metal reinforcing pin located at the center .

Generally, the screw is composed of a bolt formed by a shaft having a head portion and a male screw portion, and a nut formed inside the female screw portion to be screwed with the male screw portion formed on the shaft of the bolt. And it is used in various ways.

Such a screw is mainly made of a metal material because it requires high hardness and tensile strength. However, it has a disadvantage that it is difficult to use it in a facility handling the chemical or the like because of the disadvantage that it is easily corroded by a chemical such as acid or alkali there was. In addition, a plastic screw formed of a synthetic resin such as polypropylene, polyvinyl chloride, polyethylene (Plyythlene), ABS and nylon based materials is provided in facilities for handling chemicals and the like , The problem that the plastic screw is corroded by chemical agents is solved, but the strength is weak.

In order to solve this problem, a synthetic resin of a new material for forming a plastic screw is provided, but there is a limit in improving hardness and tensile strength.

In addition, when the heat change is severe due to environmental and internal factors of the installation position, which is one of the disadvantages of the synthetic resin, which is one of the disadvantages of the synthetic resin, the threaded portion and the female threaded portion of the threaded portion are easily released by the shrinkage ratio of the synthetic resin of the plastic thread, There was a problem that it was lost.

In order to solve these problems, a technique of reinforcing the strength by inserting a steel reinforcing material into the plastic material bolt has been developed. However, this technique exposes the reinforcing material installed in the bolt through the wrench groove formed in the head portion of the bolt There arises a problem that the reinforcing material inside the bolt is corroded by a chemical substance such as an etching solution or a cleaning liquid, and the lifetime of the bolt is shortened.

The present invention has been made in order to overcome the above-described problems of the prior art, and it is an object of the present invention to provide a method of manufacturing a plastic bolt by reinforcing the strength of a plastic bolt and easily positioning a metal reinforcing pin at a center of the plastic bolt, And to improve the life of the bolt, and a method of manufacturing the plastic rigid bolt.

According to an aspect of the present invention, there is provided a plastic rigid bolt, comprising: a metal reinforcing pin located inside a plastic rigid bolt; and a metal reinforcement pin coupled to a first end of the metal reinforcement pin to prevent exposure of the metal reinforcement pin. A first center pin for simultaneously positioning the metal reinforcement pin at the center of the plastic rigid bolt and a metal reinforcement pin for preventing the metal reinforcement pin from being exposed to the second end of the metal reinforcement pin, And a second center pin for receiving the first center pin, the metal reinforcement pin, and the second center pin at the center thereof, and exposing the end face of the first center pin and the end face of the second center, Type plastic body.

In one embodiment, the first center pin and the second center pin include a fastening part that is coupled to the metal reinforcement pin by fitting. The first center pin and the second center pin may include one end extending from the coupling portion.

In one embodiment, the fastening portion of the first center pin may have a shape selected from the group consisting of a U shape, a U shape, and a U shape.

In one embodiment, the fastening portion of the second center pin may have a shape selected from the group consisting of a U shape, a U shape, and a U shape.

In one embodiment, the first center pin and the second center pin are formed of the same material as the bolt-type plastic body. Further, it is preferable that the metal reinforcing fin has at least two openings, and the side surface thereof has a notched shape.

In order to solve the above-described problems, a plastic rigid bolt according to an embodiment of the present invention is manufactured by combining a first center pin with a first end of a metal reinforcing fin before performing a plastic injection molding method using a bolt- . And a second center pin is coupled and fixed to a second end of the metal reinforcing fin to which the first center pin is coupled. Subsequently, the reinforcing structure to which the first center pin, the metal ball pin, and the second center pin are coupled is fixed to the center of the bolt mold. Next, plastic is injected into the bolt mold to form a bolt-type plastic body for receiving the reinforcing structure. Subsequently, the first center pin part and the second center pin part of the reinforcing structure exposed and protruded from the bolt-type plastic body are removed. As a result, a plastic rigid bolt having a structure accommodated in its center portion without being exposed to the metal reinforcing fin can be manufactured.

The plastic rigid bolt having the structure according to the present invention has the metal reinforcing fin located at the center of the plastic rigid bolt, thereby securing the rigidity of the plastic bolt. Particularly, since the plastic rigid bolt finally formed by joining the fastening portions of the center pins to the first end and the second end of the metal reinforcing fin has a structure in which a part of the center pin made of plastic is exposed, It is possible to increase the lifetime of the plastic rigid bolt, thereby increasing the reliability of the bolt.

Further, in the method of manufacturing a plastic rigid bolt having the above-described structure, a reinforcing structure in which the first center pin-metal reinforcing pin-second center pin is coupled is provided, and then the reinforcing structure is positioned at the inner central portion of the metal mold. The plastic reinforcing bolt can be manufactured more easily than the plastic rigid bolt which is located at the center of the plastic rigid bolt and does not expose the metal reinforcing fin to the outside.

1 is a cross-sectional view schematically showing a plastic rigid bolt according to an embodiment of the present invention.
2 is a view illustrating metal reinforcing fins according to an embodiment of the present invention.
FIG. 3 is a view showing shapes of a first center pin or a second center pin applied in manufacturing plastic rigid bolts according to an embodiment of the present invention. FIG.
4A to 4D are process sectional views showing a method of manufacturing a plastic rigid bolt according to an embodiment of the present invention.

Hereinafter, a plastic rigid bolt according to an embodiment of the present invention and a method of manufacturing the same will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Plastic rigid bolt

1 is a cross-sectional view schematically showing a plastic rigid bolt according to an embodiment of the present invention.

Referring to FIG. 1, a plastic rigid bolt 100 according to an exemplary embodiment includes a metal reinforcing fin 110 positioned inside a plastic rigid bolt, a first center pin 120a coupled to a first end of the metal reinforcing fin, ) A second center pin (120b) coupled to a second end facing the first end of the metal reinforcement pin, and a reinforcing structure formed by coupling the first center pin, the metal reinforcement pin and the second center pin, And a bolt-type plastic body 150 which exposes a part of the end surface of the first center pin and a part of the end surface of the second center.

As an example of the metal reinforcing fin 110 applied to the plastic rigid bolt 100 in one embodiment, a metal reinforcing fin having a T-shape as shown in FIG. 2 may be used. 2 is a view illustrating metal reinforcing fins according to an embodiment of the present invention. Although not shown in the drawing, a metal reinforcing fin having an I-type shape can be used as the metal reinforcing fin.

As another example, the metal reinforcing fin 110 has a structure in which at least two openings are formed and / or a side surface thereof is processed into a notch shape, as shown in FIG. Due to such a structure, the bolt-type plastic body and the metal reinforcement pin can maximize the binding force thereof, thereby minimizing the rotational twist and the plastic bolt breakage, which are disadvantages of the plastic bolt.

The center pins 120a and 120b applied to the plastic rigid bolt 100 of the present invention are used to more precisely locate the metal reinforcing fins at the central portion of the mold of the metal mold and at the same time a part of the metal reinforcing fins is finally formed So as not to be exposed in the plastic rigid bolts. The center pin is preferably made of the same material as the bolt-type plastic body.

The first center pin 120a and the second center pin 120b are used as one set and the first center pin 120a and the second center pin 120b are used as the upper center pin and the second center pin 120b. The first center pin 120a and the second center pin 120b may be referred to as the names of the left center pin and the right center pin.

In an embodiment, the first center pin 120a and the second center pin 120b include fastening portions (engaging portions) that are coupled to the metal reinforcement pins 110 by fitting. In addition, the first center pin 120a and the second center pin 120b may have a structure including one end extending from the coupling portion.

As shown in FIG. 3, the fastening portion of the first center pin may have any one of a shape selected from a C shape, a U shape, and a U shape, and the fastening portion of the second center pin may have a U shape, And a shape selected from among a plurality of shapes. FIG. 3 is a view showing shapes of a first center pin or a second center pin applied in manufacturing plastic rigid bolts according to an embodiment of the present invention. FIG. The first center pin 120a and the second center pin 120b shown in FIG. 1 are in a state in which one end of the center pin is removed during the manufacturing process of the final plastic rigid bolt. That is, one end of the center pins removed in manufacturing the crown is a member used to mount the reinforcing structure having the structure of the first center pin-metal reinforcement pin-second center pin to the bolt-type mold.

In one embodiment, the first center pin 120a and the second center pin 120b may be formed of the same material as the bolt-type plastic body 150. The fastening portion of the first center pin 120a and the second center pin 120b is coupled to a notch and / or an opening formed in the metal reinforcement pin and is fixed to the metal reinforcement pin. That is, the first center pin 120a and the second center pin 120b are coupled to the metal reinforcing fin 110, and thus the reinforcing structure having a structure in which the first center pin 120a and the second center pin 120b are coupled by the first center pin- Can be formed.

The plastic rigid bolt having the above-described structure can secure the rigidity of the plastic bolt because the metal reinforcing pin is accurately located in the center of the plastic rigid bolt. Particularly, since the plastic rigid bolt formed by joining the fastening portions of the center pin to the first end and the second end of the metal reinforcing fin has a state in which a part of the center pin of the plastic material is exposed, It is possible to increase the lifetime of the plastic rigid bolt, thereby increasing the reliability of the bolt.

Manufacturing method of plastic rigid bolts

Hereinafter, a method for manufacturing a plastic rigid bolt will be described with reference to Figs. 4A, 4C.

Referring to FIG. 4A, first, a metal reinforcing fin 110, a first center pin 120a, and a second center pin are prepared. The metal reinforcement pin, the first center pin, and the second center pin may be manufactured using a 3D printer.

The metal reinforcing fins may be selected from among the metal reinforcing fins mentioned in FIG. 2, and a detailed description thereof will be omitted in order to avoid redundancy, as described above.

3 can be used as the first center pin 120a and the second center pin 120b, and a detailed description thereof is omitted in order to avoid duplication since it is the same as that described in the plastic rigid bolt.

Next, the first center pin 120a is fixedly coupled to the first end of the metal reinforcement fin 110. The coupling between the first center pin and the metal reinforcing fin 110 can be achieved by fastening the coupling part of the first center pin to the coupling groove formed in the metal reinforcing fin.

Then, the second center pin is fixedly coupled to the second end of the metal reinforcing fin 110 to which the first center pin is coupled. The coupling between the second center pin and the metal reinforcing fin 110 can be achieved by fastening the coupling portion of the second center pin to the coupling groove formed in the metal reinforcing fin.

Then, the reinforcement structure coupled with the first center pin-metal reinforcement pin-second center pin is positioned in the center of the bolt-type metal mold 200. 4B, the bolt-type metal mold 200 has a space corresponding to the body of the plastic bolt and a fixing groove for fixing the end portions of the first center pin and the second center pin . Although not shown in the drawings, the bolt-type mold has an injection port for injecting the plastic into the space.

Next, a bolt-type plastic body having a structure for housing the reinforcing structure shown in FIG. 4C by injecting plastic into the bolt mold in which the reinforcing structure with the first center pin-metal reinforcing pin- . At this time, a part of the first center pin and a part of the second center pin are exposed.

Subsequently, the first center pin part and the second center pin part of the reinforcing structure exposed from the bolt-type plastic body are removed. As a result, a plastic rigid bolt for accommodating the metal reinforcing pin at its center can be manufactured as shown in Fig. 4d and Fig.

The manufacturing method of the plastic rigid bolt having the above-mentioned structure is characterized in that the step of applying the step of providing the reinforcing structure in which the first center pin-metal reinforcing pin-second center pin is coupled and then placing it in the inner central portion of the mold is applied The metal reinforcing fin can be manufactured more easily than a plastic rigid bolt in which the metal reinforcing fin is not exposed to the outside while the metal reinforcing pin is accurately positioned at the inner center of the plastic rigid bolt.

100: plastic rigid bolt 110: metal reinforcing pin
120a: first center pin 120b: second center pin
150: Bolt-type plastic body

Claims (5)

A plastic rigid bolt having a structure in which a metal reinforcing fin is incorporated.
Metal reinforcing pins;
A first center pin coupled to a first end of the metal reinforcement pin;
A second center pin coupled to a second end of the metal reinforcement pin; And
And a bolt-type plastic body accommodating the first center pin, the metal reinforcement pin, and the second center pin at the center thereof and exposing the end face of the first center pin and the end face of the second center. The plastic rigid bolt according to claim 1, wherein the first center pin and the second center pin include a fastening part that is coupled to the metal reinforcement pin by fitting. 3. The plastic rigid bolt according to claim 2, wherein the fastening portion of the first center pin and the second center pin has a shape selected from a U shape, a U shape, and a U shape. The metal reinforcement pin according to claim 1, wherein the first center pin and the second center pin have the same material as the bolt-type plastic body, the metal reinforcement pin has at least two or more openings, Wherein the plastic rigid bolt has a notched shape. A method of manufacturing a plastic rigid bolt by a plastic injection molding method using a bolt-type mold,
Attaching a first center pin to a first end of the metal reinforcement pin;
Attaching a second center pin to a second end of the metal reinforcing fin to which the first slit pin is coupled;
Fixing the reinforcing structure joined by the first center pin, the metal reinforcement pin and the second center pin to the center of the bolt mold;
Molding a bolt-type plastic body having a structure for injecting plastic into the bolt mold to receive the reinforcing structure; And
And removing the first center pin part and the second center pin part exposed from the bolt-type plastic body.
KR1020150137623A 2015-09-30 2015-09-30 plastic hardness bolt and method of manufacturing the plastic hardness bolt KR101775003B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150137623A KR101775003B1 (en) 2015-09-30 2015-09-30 plastic hardness bolt and method of manufacturing the plastic hardness bolt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150137623A KR101775003B1 (en) 2015-09-30 2015-09-30 plastic hardness bolt and method of manufacturing the plastic hardness bolt

Publications (2)

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KR20170038353A true KR20170038353A (en) 2017-04-07
KR101775003B1 KR101775003B1 (en) 2017-09-19

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190071313A (en) 2017-12-14 2019-06-24 정기선 Hard cast alloy bolts and their manufacturing methodsod
JP2020062351A (en) * 2018-10-19 2020-04-23 タカノ株式会社 Junction structure between components of chair and chair using the same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200380014Y1 (en) * 2005-01-11 2005-03-24 (주) 와이 디 티 Plastic volt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190071313A (en) 2017-12-14 2019-06-24 정기선 Hard cast alloy bolts and their manufacturing methodsod
JP2020062351A (en) * 2018-10-19 2020-04-23 タカノ株式会社 Junction structure between components of chair and chair using the same

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Publication number Publication date
KR101775003B1 (en) 2017-09-19

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