KR20180001359A - Bolt masking cap and manufacturing apparatus of bolt masking thereof - Google Patents

Abstract

According to the present invention, a bolt masking cap and a manufacturing apparatus therefor are provided, wherein in a state in which the cap is coupled to a head portion of a bolt that is pre-installed in a structure, a painting process is performed. Therefore, only the head portion of the bolt is selectively masked, and the bolt masking cap is easily coupled and separated to shorten working time. Moreover, the bolt masking cap can be reused to reduce manufacturing costs.

Description

TECHNICAL FIELD [0001] The present invention relates to a cap for masking bolts and a manufacturing apparatus therefor,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap for bolt masking and an apparatus for manufacturing the same. More particularly, the present invention relates to a cap for bolt masking, The present invention relates to a cap for masking a bolt and an apparatus for manufacturing the same, which can reduce manufacturing time and cost because of easy reassembly and separation.

Generally, a painting process is performed in order to make aesthetic appearance beautiful on the outside of certain structures and equipment, and to prolong the life.

In the conventional coating process, a masking process is performed to attach a masking tape to a corresponding position of the bolt so that paint is not applied to the head of the bolt.

In the conventional masking process, the masking tape of paper is cut into a predetermined shape and attached to the head of the previously installed bolt. After the coating is completed, the process of detaching the masking tape attached to the head of the bolt proceeds.

However, in the conventional masking process, it is necessary to cut the masking tape into a certain shape and attach it to the head of the bolt. However, it takes a lot of time to cut and attach the paper tape, It has been difficult to accurately adhere the masking tape to the part.

A prior art related to the present invention is Korea Public Practice No. 20-2009-0000324 (Jan. 13, 2009), which discloses a masking tape.

It is an object of the present invention to provide a method and apparatus for selectively masking only the head of a bolt by performing a coating process while a cap is attached to a head of a bolt installed in a structure, And a manufacturing cost of the bolt masking cap, and an apparatus for manufacturing the same.

The bolt masking cap according to the present invention is characterized in that the bolt masking cap includes a cylindrical body having a coupling groove formed on the front surface thereof so as to be coupled to a head portion of a bolt provided on a mounting surface, And a separating projection for applying an external force to the side or rear of the body when the body is separated.

Preferably, a washer is further coupled between the head portion and the mounting surface, and the inner diameter of the front end of the body is formed to have a diameter larger than that of the coupling groove, so that a step portion into which the washer is inserted is further formed.

Preferably, the front end of the step portion is further formed with a round surface that forms a curvature such that the diameter gradually increases toward the front side.

Preferably, the outer diameter of the front end of the body further includes a tapered surface so that the diameter gradually decreases toward the front.

Preferably, the body and the separating protrusion are formed of synthetic rubber or a resin-based material.

Further, a polygonal surface having a shape corresponding to the head portion of the bolt may be formed on the inner circumferential surface of the fastening groove.

The apparatus for manufacturing a bolt masking cap according to the present invention comprises a lower mold having a material on an upper surface thereof and a cylindrical lower mold recessed on an upper surface thereof, An upper mold in which the upper punch is protruded so as to press the material so as to be inserted into the lower mold when the lower mold is lowered and a heating unit which conveys heat from the outside to the lower mold and the lower punch, Member. ≪ / RTI >

Here, when the upper punch is inserted into the lower frame, it is preferable that the material is located in a distance between the upper punch and the lower frame.

The upper mold may further include a driving unit for transmitting an elevating driving force.

A guide hole may be vertically penetrated through the upper mold, and a guide beam for guiding the upper mold up and down when the upper mold is lifted may be further coupled to the guide hole.

In addition, the lower frame and the upper punch are preferably arranged in a plurality of different diameters at different positions.

The present invention relates to a cap for bolt masking and an apparatus for manufacturing the same. More particularly, the present invention relates to a cap for bolt masking, and more particularly, ), And can be easily combined and separated to shorten the working time, and the manufacturing cost can be reduced because it can be reused.

1 is a perspective view illustrating a bolt masking cap according to a first embodiment of the present invention.
2 is a cross-sectional view illustrating a bolt masking cap according to a first embodiment of the present invention.
3 is an installation state view showing a bolt masking cap according to a first embodiment of the present invention.
4 is an exploded cross-sectional view illustrating a cap for masking bolts according to a second embodiment of the present invention.
FIG. 5 is a cross-sectional view illustrating a bolt masking cap according to a second embodiment of the present invention.
6 is a plan view showing a lower mold of an upper mold according to a second embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving it will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings.

The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

FIG. 1 is a perspective view showing a bolt masking cap according to a first embodiment of the present invention, FIG. 2 is a sectional view showing a bolt masking cap according to a first embodiment of the present invention, FIG. FIG. 3 is an installation view showing a bolt masking cap according to a first embodiment of the present invention. FIG.

1 to 3, the cap 100 for a bolt masking according to the first embodiment of the present invention is provided with a body 110 and a separating protrusion 120.

The body 110 is coupled to the head 11 of the bolt 10 exposed on the installation surface 1 prior to the painting operation so that the head 11 of the bolt 10, To prevent the paint from being applied.

1, the body 110 may be formed in a cylindrical shape having a coupling groove 111 formed on the front surface thereof, as shown in FIG. 1. A head 11 of the bolt 10 is inserted through the inlet of the coupling groove 111, do.

The body 110 is preferably made of a synthetic rubber or a resin material so as to be tightly coupled to the head 11 of the bolt 10.

For example, the body 110 may be made of silicone rubber or acrylonitrile-butadiene rubber (NBR).

The inner diameter of the fastening groove 111 is formed to have a diameter corresponding to the head 11 of the bolt 10 as shown in Fig.

The washer 20 may further be coupled between the head 11 of the bolt 10 and the mounting surface 1. In this case, And a step portion 130 formed with a larger diameter and into which the washer 20 is inserted can be further formed.

3, the washer 20 is formed to have a larger diameter than the head 11 of the bolt 10, so that the outer surface of the washer 20 is also masked by using the step 130 .

In addition, a round surface 140 may be further formed at the front end of the step 130 to form a curvature such that the diameter gradually increases toward the front.

3, when the head 11 and the washer 20 of the bolt 10 are inserted through the opening of the coupling groove 111, the round surface 140 forms a certain curvature, It is possible to prevent interference between the front end of the body 110 and the head 11 and the washer 20 from being caught.

In addition, the outer diameter of the front end of the body 110 may be further formed with a tapered surface 150 so that the diameter gradually decreases toward the front.

3, the diameter of the tapered surface 150 decreases toward the front, so that the contact area between the front end of the body 110 and the mounting surface 1 can be reduced.

That is, when the cap 100 is separated from the head 11 of the bolt 10 and the washer 20 after the completion of the coating process because the contact area between the body 110 and the mounting surface 1 is narrow, The area to which the paint portion 30 is not applied can be reduced.

Although not shown, a polygonal surface (not shown) corresponding to the head 11 of the bolt 10 may be formed on the inner circumferential surface of the coupling groove 111.

The separating protrusion 120 protrudes from the rear surface of the body 110, and the separating protrusion 120 may protrude in a cylindrical shape or a polygonal shape.

The separating protrusion 120 may be formed of the same synthetic rubber or resin material as the body 110. The separating protrusion 120 may protrude from the central position of the body 110,

For example, the separating protrusion 120 may be made of a silicone rubber or an acrylonitrile-butadiene rubber (NBR).

The separation protrusion 120 is used when the body 110 is to be separated from the head 11 of the bolt 10.

For example, when the body 110 is to be separated from the head 11 of the bolt 10, it is necessary to hold the separating protrusion 120 by hand and pull it backward, or alternatively, by using a separate tool, As shown in FIG.

The body 110 may be separated from the head 11 of the bolt 10 by applying an external force to the side of the separation protrusion 120 by using a separate tool.

In addition, the cap 100 may be reused in such a manner that the paint attached to the outer surface of the body 110 is peeled off while peeling off the attached paint of the separation protrusion 120 first.

Hereinafter, an apparatus for manufacturing a bolt masking cap 100 according to another embodiment of the present invention will be described as follows, and the same configuration as the above-described configuration will not be repeatedly described.

FIG. 4 is an exploded sectional view showing a cap 100 for bolt masking according to a second embodiment of the present invention. FIG. 5 is a sectional view illustrating a cap 100 for bolt masking according to a second embodiment of the present invention. And FIG. 6 is a plan view showing a lower mold of an upper mold according to a second embodiment of the present invention.

4 to 6, the apparatus for manufacturing the bolt masking cap 100 according to the second embodiment of the present invention includes a lower mold 200, an upper mold 300, and a heating member 600 do.

The lower mold 200 is horizontally installed at a predetermined position and a cylindrical lower mold 210 is concavely formed on the upper surface of the lower mold 200 such that the material S is positioned thereon.

Here, a polygonal surface (not shown) corresponding to the head 11 of the bolt 10 may be further formed on the inner peripheral surface of the lower frame 210.

As shown in FIG. 6, the lower frame 210 may have a plurality of different diameters.

For example, the bolt 10 may include hexagonal bolts and hexagonal wrench bolts having standard sizes such as M5, M6, M8, M10, M12, M16, M18, M20, and M24.

That is, the lower frame 210 is formed to have various diameters in accordance with the diameter of the cap 100 corresponding to the head 11 of the bolt 10.

A protrusion groove 211 for forming the separation protrusion 120 of the cap 100 may be concavely formed on the bottom surface of the lower mold 210. The protrusion groove 211 may be formed in a lower mold (Not shown).

The material S refers to a synthetic rubber or a resin-based material, and the material S can be placed in a solid state on the upper or inside of the lower frame 210.

The upper mold 300 is installed on the upper part of the lower mold 200 so that the upper mold 300 can be raised and lowered and the upper punch 310 corresponding to the lower frame 210 protrudes from the lower surface of the upper mold 300.

The upper punch 310 is inserted into the lower mold 210 at a predetermined length through the upper mold 300 so as to be inserted into the lower mold 210 when the upper mold 300 is lowered, do.

Here, the upper punch 310 may be arranged at a plurality of different diameters at different positions as shown in FIG.

4 and 5, the upper mold 300 may further include a driving unit 400 for transmitting an elevating driving force.

A guide hole 320 may be vertically formed in the upper mold 300. A guide beam 500 for guiding the upper mold 300 up and down when the upper mold 300 is lifted is provided in the guide groove 320, Can be further combined.

The heating member 600 generates heat by electric power transmitted from the outside and the heating member 600 conveys heat from the outside to the lower frame 210 and the lower punch 210, To be heated to a set temperature.

Here, the heating member 600 may be connected to the lower mold 200 and the upper mold 300, respectively, as shown in FIGS.

Hereinafter, the operation of the apparatus for manufacturing the bolt masking cap 100 according to the second embodiment of the present invention will be described with reference to FIGS. 4 to 6. FIG.

First, as shown in FIG. 4, a certain amount of material S is placed on the upper surface of the lower mold 200 in a state where the upper mold 300 is raised.

Here, the material S may be disposed on the upper surface of the lower mold 200 in the form of a panel having a predetermined width as shown in FIG.

The upper mold 300 is lowered to insert the upper punch 310 positioned at the lower surface of the upper mold 300 through the upper end of the lower mold 210 to a predetermined length.

At this time, a part of the material S positioned on the upper part of the lower frame 210 is pressed into the lower frame 210 by the pressing force of the upper punch 310, and the upper punch 310 and the lower frame 210, The material S is placed in a state in which the material S is pressed in the space between the first and second substrates 210. [

That is, the upper punch 310 forms the coupling groove 111 of the cap 100, and the lower frame 210 forms the outer shape of the cap 100.

Next, the heating member 600 is driven to heat the material S positioned between the lower mold 210 and the upper punch 310 to a set temperature.

At this time, the material S heated by the heating member 600 is softened in an easy-to-mold state, so that the solid state material S is easily deformed into the shape of the cap 100.

Next, when the upper mold 300 is raised, the pressurized material S in the shape of the cap 100 can be separated from the lower mold 210 while being coupled to the upper punch 310.

Of course, when raising the upper mold 300, the material S processed into the shape of the cap 100 may be positioned in the lower mold 210. [

At this time, the outer shape of the material S is processed into a cap 100 having the same shape as the inner surface of the lower mold 210, and the protrusion groove 211 of the lower mold 210 corresponds to the bottom of the cap 100 The separation protrusion 120 is formed.

Finally, the material S placed in the upper punch 310 or the lower frame 210 is separated to the outside, and then cooled for a predetermined period of time, or the remaining portion except for the portion processed in the shape of the cap 100 is cut .

At this time, various types of caps 100 may be formed together with various types of lower molds 210 having different diameters, as shown in FIG. 6, in the processed material S.

As a result, in the present invention, the coating process can be performed while the cap 100 is coupled to the head 11 of the bolt 10 installed in the structure and exposed to the outside.

Thus, the present invention can selectively mask only the head 11 of the bolt 10, prevent paint from being applied to the head 11 of the bolt 10, It is possible to shorten the working time and reusable, thereby reducing manufacturing cost.

Although the embodiments of the cap for bolt masking and the apparatus for manufacturing the same according to the present invention have been described above, it is obvious that various modifications are possible within the scope of the present invention.

Therefore, the scope of the present invention should not be construed as being limited to the embodiments described, but should be determined by the scope of claims of the patent as well as the claims of the patent registration described later.

That is, it should be understood that the above-described embodiments are illustrative and non-restrictive in all aspects and that the scope of the present invention is indicated by the appended claims rather than the detailed description, Ranges and equivalents thereof are to be construed as being included within the scope of the present invention.

1: Mounting surface 10: Bolt
11: Head 20: Washer
30: paint part 100: cap
110: body 111: fastening groove
120: separation protrusion 130:
140: Round face 150: Taper face
200: lower mold 210: lower mold
211: protrusion groove 300: upper mold
310: upper punch 320: guide hole
400: Driving unit 500: Guide beam
S: Material

Claims (11)

A cylindrical body having a fastening groove formed on a front surface thereof so as to be coupled to a head of the bolt installed on the mounting surface; And
And a separating protrusion protruding from a rear surface of the body and applying an external force to the side or rear of the body when the body is coupled to the head. The method according to claim 1,
Between the head part and the mounting surface,
The washer is further coupled,
In the inner diameter on the front end side of the body,
Wherein a diameter of the bolt is larger than that of the fastening groove, and a step portion into which the washer is inserted is further formed. The method of claim 2,
At the front end of the step portion,
And a round surface for forming a curvature such that the diameter progressively increases toward the front side is further formed. The method according to claim 1,
On the front-side outer diameter of the body,
And a tapered surface is further formed so that the diameter becomes gradually smaller toward the front. The method according to claim 1,
The body and the separating projection may be formed,
Characterized in that the bolt masking cap is made of a synthetic rubber or a resin-based material. The method according to claim 1,
On the inner circumferential surface of the fastening groove,
And a polygonal surface having a shape corresponding to the head of the bolt is formed. A lower mold in which a material is positioned on an upper surface and a cylindrical lower mold is recessed on an upper surface thereof;
An upper mold having an upper punch protruding from the lower surface of the lower mold to press the material when the lower mold is lowered, And
And a heating member for transferring heat from the outside to the lower frame and the lower punch to heat-mold the material to a predetermined temperature. The method of claim 7,
Wherein when the upper punch is inserted into the lower frame, the material is positioned within a gap between the upper punch and the lower frame. The method of claim 7,
In the upper mold,
And a drive unit for transferring a lift driving force is further connected to the bolt. The method of claim 7,
In the upper mold,
A guide hole is vertically penetrated,
In the guide hole,
And a guide beam for guiding the upper metal mold up and down when the upper mold is lifted. The method of claim 7,
Wherein the lower frame and the upper punch comprise:
Wherein a plurality of different diameters are arranged at mutually different positions.

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