KR20120113895A - Bellows structure and bellows structure manufacturing method - Google Patents

Bellows structure and bellows structure manufacturing method Download PDF

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Publication number
KR20120113895A
KR20120113895A KR1020110031570A KR20110031570A KR20120113895A KR 20120113895 A KR20120113895 A KR 20120113895A KR 1020110031570 A KR1020110031570 A KR 1020110031570A KR 20110031570 A KR20110031570 A KR 20110031570A KR 20120113895 A KR20120113895 A KR 20120113895A
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KR
South Korea
Prior art keywords
diameter portion
outer diameter
inner diameter
bellows
elasticity
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Application number
KR1020110031570A
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Korean (ko)
Inventor
송영민
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송영민
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Application filed by 송영민 filed Critical 송영민
Priority to KR1020110031570A priority Critical patent/KR20120113895A/en
Publication of KR20120113895A publication Critical patent/KR20120113895A/en

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    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • 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
    • B29D23/00—Producing tubular articles
    • B29D23/18—Pleated or corrugated hoses
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/15—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics corrugated

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

PURPOSE: A bellows structure for improving flexibility and a manufacturing method thereof are provided to smoothly perform an extension and contraction between pitches while protecting a movable cable and variable kinds of parts. CONSTITUTION: A bellows(1) structure for improving flexibility comprises a plurality of thermoplastic resin plates(2). The thermoplastic resin plates comprise an unit sheet type having outer diameter portions(21) and inner diameter portions(22). The inner and outer diameter portions of the plates are welded to inner and outer diameter portions of a corresponding plate along the rim portions by high-frequency welding. A portion being connected from the outer diameter portion to the inner diameter portion of the plate is formed into a cone shape so that a conical surface(23) is formed.

Description

Bellows structure and Bellows structure manufacturing method for improving elasticity

The present invention relates to a bellows structure for improving elasticity and a method of manufacturing the same, and more particularly, using the bellows that requires elasticity and protection for the safe use of cables or parts of the device as a thermoplastic resin material. The present invention relates to a bellows structure and a method of manufacturing the same for improving elasticity by improving elasticity.

In general, bellows are formed by forming a bellows made of a flexible material such as fabric, rubber or plastic, or an elastic material, and forming a wave on a rolled bellows and a metal plate manufactured by rolling a metal tube and then welding them. It can be divided into welded bellows. The molded bellows, the rolled bellows and the welded bellows can be expanded and contracted while forming the corrugated pipe 1.

The molding bellows may be molded as shown in FIG. 7A attached to the rubber and the elastic material through the mold (form) and air injection, or the metal rings may be inserted into the fabric and the flexible material at equal intervals and to prevent the metal rings from coming off. Suture is molded as shown in Figure 7d attached. Since they are manufactured by molding through a mold and sewing through sewing, the distance between the thread and the thread is long, so that the shrinkage length and the elongation length are relatively long.

The rolled bellows is rolled to form wrinkles on the circumferential surface of the metal tube formed of a material such as phosphor bronze, stainless steel, etc., and the elasticity of the shaft length is very low, so that the shrinkage length change is small.

In addition, the welded bellows is formed by joining the inner and outer contact portions by welding after forming a wave on a metal plate made of phosphor bronze material, and has a long stretch length, excellent shape retention performance, and a large elastic force, compared to general rolled bellows. Has

 The conventional bellows is used as a corrugated box or corrugated pipe which is mainly used when applied to a part of a device and needs flexibility and sealability, and serves as a main component such as a flexible material joint, an automatic control switch or valve, and a protective tube. Will be performed.

However, the molded bellows among the conventional bellows have to be manufactured and used according to each mold device to produce products of various sizes, so excessive cost is required, and the thickness of the wrinkle part is uneven, so the service life of the product is short. Molded bellows have a problem of being limited to elasticity because of its low elasticity, and welded bellows have problems of shortening the life due to corrosion at the welded part and having a smaller elasticity than molded bellows.

On the other hand, since the conventional bellows are mainly used for the purpose of returning after being stretched more than shrinking, all the bellows have a necessity of developing a good bellows.

In other words, the need for a bellows having the use of a protective cover that can reduce manufacturing costs and minimize installation space while having elasticity and protection for the safe use of moving cables or parts among the bellows used in industrial equipment.

Accordingly, the present invention is to solve the above-mentioned conventional problems, an object of the present invention is to improve the elasticity by forming a thermoplastic resin material in a high frequency bonding method so that the elasticity is excellent while wrapping and protecting the cable or various components moving in the reciprocating In particular, the present invention provides a bellows structure and a method of manufacturing the same for improving the elasticity to minimize the space occupancy by minimizing the space occupancy by making the shrinkage and extension between pitches smooth.

Bellows structure for improving the elasticity of the present invention for achieving the above object is a bellows structure for improving the elasticity of the corrugated pipe form of the elastic structure. The corrugated pipe is provided with a plurality of thermoplastic resin plates in the form of a unit sheet having an outer diameter portion and an inner diameter portion; The outer diameter portion and the inner diameter portion of the plate body are joined to the outer diameter portion and the inner diameter portion of the plate body corresponding to the next through the high frequency welding, the edge portion is connected to the inner diameter portion from the outer diameter portion of the plate body is formed in a conical shape The conical surface may be characterized by technical construction.

In addition, the method of manufacturing the bellows structure for improving the elasticity of the present invention for achieving the above object is a method of manufacturing a bellows structure for improving the elasticity forming a corrugated pipe form of the stretchable structure, the unit sheet form having an outer diameter and an inner diameter A processing step of forming a plurality of thermoplastic resin plates to form a; Forming a conical surface by arranging the two plates in a mold so as to face each other in a pair and compressing a portion extending from the outer diameter of each plate to the inner diameter with a pressing member of the mold; A first joining step of joining the inner diameter edge portions of the pair of plate bodies formed into a cone shape by joining them with a high frequency welding jig; A second joining step of joining one outer diameter part of the pair of plate bodies joined in the first joining step and an edge part of one outer diameter part of the pair of plate bodies corresponding to the next by joining with a high frequency welding jig; It may be characterized by a technical configuration that comprises the step of moving to each of the process step, the forming step, the first bonding step and the second bonding step.

According to the present invention, the flexible corrugated pipe completed through the step of processing, forming and joining the sheet-shaped thermoplastic sheet is bonded to the inner diameter part while forming the conical surface and then joined to the outer diameter part, so that the pitch is wrapped and protected while reciprocating the cable or various parts. The expansion and contraction of the liver is made smoothly, and in particular, the shrinkage length can be minimized, thereby reducing the manufacturing cost of the device and providing the effect of minimizing the installation space.

1 is a perspective view showing a bellows structure for improving elasticity according to the present invention.
Figures 2a and 2b is a partial cross-sectional view and front view showing a stretch state of the bellows structure of FIG.
Figure 3 is a perspective view showing a bellows structure for improving the elasticity of another embodiment according to the present invention.
4A and 4B are fragmentary cross-sectional and front views showing a stretch state of the bellows structure of FIG.
Figure 5 is a block diagram showing a manufacturing process of the bellows structure for improving the elasticity according to the present invention.
6A to 6D are schematic views for explaining a manufacturing process of a bellows structure for improving elasticity according to the present invention.
7A and 7B are partial sectional views showing a conventional bellows.

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

1 is a perspective view showing a bellows for improving elasticity according to the present invention, 1 is a corrugated pipe, 2 is a plate, 21 is an outer diameter part, 23 is a conical surface.

The bellows of the present invention forms a corrugated pipe 1 having a stretchable structure, and the migration pipe 1 has a plurality of thermoplastic resin plates 2 forming a unit sheet form having an outer diameter portion 21 and an inner diameter portion 22. It is made by splicing.

The plate 2 constituting the corrugated pipe 1 is made by processing a sheet having a thickness of 0.5 to 5 mm made of thermoplastic resin materials such as polyvinyl chloride, polystyrene, polyethylene, nylon, and acrylic.

In addition, the corrugated pipe 1 has an edge on the outer diameter portion 21 and the inner diameter portion 22 of the plate body 2 corresponding to the outer diameter portion 21 and the inner diameter portion 22 of the plate body 2 through high frequency welding, respectively. The parts are joined together.

On the other hand, in order to provide a structure for smooth expansion and contraction in the process of forming the corrugated pipe (1) to form a conical surface of the portion from the outer diameter portion 21 of the plate body 2 to the inner diameter portion 22 to form a cone ( 23).

That is, when the outer diameter portion 21 and the inner diameter portion 22 of the plate body 2 are joined as they are in a planar state, since they return to a plane which is the original state of the sheet when shrinking, the outer state is good, but the outer diameter portion 21 when stretched. And the inner diameter portion 22 is changed to a conical shape when the outer diameter portion 21 does not maintain its shape when it is bent and twisted to form a conical surface 23 to prevent this,

Therefore, the conical surface 23 of the plate 2 is molded to form an inclination angle α of 10 to 40 degrees by pressing the molds 3 and 3 'and the pressing members 4 and 4' as shown in FIG. 4B.

In addition, the corrugated pipe 1 has a cylindrical or outer diameter portion 21 and an inner diameter portion 22 of FIG. 1 in which the outer diameter portion 21 and the inner diameter portion 22 are bonded to each other by the same plate body 2. The plate 2 may be joined to form a conical shape as shown in FIGS. 3 and 4A.

Next, a method of manufacturing the bellows corrugated pipe 1 of the present invention will be described in detail with reference to FIGS. 5 and 6A to 6D.

First, the corrugated pipe 1 having a stretchable structure forms a plurality of thermoplastic resin plates 2 having a unit sheet shape having an outer diameter portion 21 and an inner diameter portion 22 through press punching or molding through an injection apparatus. The processing step 100 is performed.

Subsequently, the processed plate body 2 is arranged in a pair so as to face each other in pairs, as illustrated in FIG. 6A, according to the guide of the guide pipe 31, and the outer diameter portion of each plate body 2 is provided. In step 21, the portion leading to the inner diameter portion 22 is pressed into the pressing members 4 and 4 'of the molds 3 and 3', and formed into a conical shape to form a conical surface 23. . In the method of forming the conical surface 23 extending from the outer diameter portion 21 of the plate 2 to the inner diameter portion 22, the state is increased by the pressing force of the molds 3 and 3 ′ and the pressing members 4 and 4 ′. Natural molding method for joining the inner diameter portion 22 or the plate body 2 through the mold (3, 3 ') and the pressing member (4, 4') heated to an appropriate firing temperature suitable for the characteristics of each material. The way is done.

Next, a first joining step 300 is performed in which the edges of the inner diameter portion 22 of the pair of plate bodies 2 formed in the cone shape are joined by high frequency welding jig 5, 5 ′. .

Next, one outer diameter portion 21 of the pair of plate bodies 2 joined in the first joining step 300 and one outer diameter portion 21 of the pair of plate bodies 2 corresponding to the following are illustrated. As shown in 6b, a second joining step 400 for joining and connecting with the high frequency welding jig 6 and 6 'is performed.

The size of the outer joining portion 21 and the inner joining portion 22 of the edge portion of the plate body 2 joined through the first joining step 300 and the second joining step 400 is 2 to 10 mm for durability. The width is formed.

 And to complete the product, including the step of moving to each process, the processing step 100, the forming step 200, the first bonding step 300 and the second bonding step 400.

Bellows structure for improving the elasticity according to the present invention completed through the manufacturing process as described above by pressing the sheet plate body (2) having an outer diameter portion 21 and the inner diameter portion 22 to form a conical shape conical surface (23) Immediately after formation, the inner diameter part 22 is connected through high frequency bonding, and then the outer diameter portion 21 is formed to be connected through high frequency bonding to make a finished product. The manufacturing process is simple and the outer diameter portion 21 and the inner diameter portion are formed. (22) is formed between the conical surface (23), so the expansion and contraction freely stretched between pitches while wrapping and protecting the cable or various components moving in and out of reciprocation, in particular, the corrugated pipe ( By forming 1), the length after shrinking is short, which provides the effect of reducing the manufacturing cost of equipment and minimizing the installation space.

In addition, although the corrugated pipe 1 is formed using the sheet-like plate 2, the length (height) after shrinkage is shorter than that of the conventional corrugated pipe even when formed in a cylindrical shape as shown in FIG. If it is formed in a conical shape as in 3, the length (height) after shrinking is shortened as in FIGS. 3a and 3b, thereby minimizing the installation space and working distance of the device.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Accordingly, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

1: corrugated pipe 2: plate body
21: outer diameter part 22: inner diameter part
23: cone surface 3, 3 ': mold
4, 4 '; Pressing member 5, 5 ': jig
6, 6 ': jig

Claims (5)

In bellows structure for elasticity improvement which forms the corrugated pipe (1) form of elastic structure.
The corrugated pipe 1 is,
Providing a plurality of thermoplastic resin plate bodies 2 in the form of a unit sheet having an outer diameter portion 21 and an inner diameter portion 22;
The outer diameter portion 21 and the inner diameter portion 22 of the plate body 2 are respectively connected to the outer diameter portion 21 and the inner diameter portion 22 of the plate body 2 corresponding to the next by joining the edge portion through high frequency welding. , Bellows structure for improving elasticity, characterized in that the portion extending from the outer diameter portion 21 of the plate body 2 to the inner diameter portion 22 is formed in a conical shape to form a conical surface (23).
The method of claim 1,
Bellows structure for improving the elasticity, characterized in that the conical surface (23) of the plate body (2) is formed to form an inclination angle (α) of 10 to 40 degrees by pressing the mold (3, 3 ').
According to claim 1, wherein the corrugated pipe (1) has a cylindrical or outer diameter portion 21 and the inner diameter portion 22 in which the outer diameter portion 21 and the inner diameter portion 22 are joined to the same plate 2 is sequentially smaller Bellows structure for improving the elasticity, characterized in that formed in a conical shape joined to the plate (2).
In the bellows structure manufacturing method for improving elasticity forming the corrugated pipe (1) of the elastic structure,
A processing step (100) for forming a plurality of thermoplastic resin plate bodies (2) having a unit sheet form having an outer diameter portion (21) and an inner diameter portion (22);
The two plates 2 are placed on the molds 3 and 3 'so as to face each other in pairs, and the portions extending from the outer diameter portion 21 of the respective plate bodies 2 to the inner diameter portion 22 are transferred to the molds 3 and 3. ') And the pressing step (4, 4') forming step 200 to form a conical surface (23) in the form of a cone;
A first joining step (300) for joining and connecting the inner diameter portion (22) of the pair of plate bodies (2) formed in the shape of a cone by a high frequency welding jig (5, 5 ');
High frequency welding of the edge portion of one outer diameter portion 21 of the pair of plate bodies 2 joined in the first bonding step 300 and one outer diameter portion 21 of the pair of plate bodies 2 corresponding to the next A second joining step 400 for joining and connecting with the jig 6 and 6 ';
Bellows structure for improving the elasticity, characterized in that it comprises the step of moving to each of the process step 100, forming step 200, the first bonding step 300 and the second bonding step 400 Manufacturing method.
3. The method according to claim 2, wherein the formation of the conical surface (23) from the outer diameter portion (21) of the plate member (2) to the inner diameter portion (22) is a pressing force of the molds (3, 3 ') and the pressing members (4, 4'). Bellows for improving elasticity, characterized in that the molding step (200) consisting of a natural molding method or a heating molding method for molding into a mold (3, 3 ') and a pressing member (4, 4') heated to a firing temperature. Manufacturing method of the structure
KR1020110031570A 2011-04-06 2011-04-06 Bellows structure and bellows structure manufacturing method KR20120113895A (en)

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KR1020110031570A KR20120113895A (en) 2011-04-06 2011-04-06 Bellows structure and bellows structure manufacturing method

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Application Number Priority Date Filing Date Title
KR1020110031570A KR20120113895A (en) 2011-04-06 2011-04-06 Bellows structure and bellows structure manufacturing method

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KR20120113895A true KR20120113895A (en) 2012-10-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101981541B1 (en) * 2018-06-18 2019-05-23 주식회사 삼화테크 Method for manufacturing bellows
KR20200125881A (en) * 2019-04-26 2020-11-05 현대트랜시스 주식회사 Method for manufaturing of corrugated tube for ventilation seat

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101981541B1 (en) * 2018-06-18 2019-05-23 주식회사 삼화테크 Method for manufacturing bellows
KR20200125881A (en) * 2019-04-26 2020-11-05 현대트랜시스 주식회사 Method for manufaturing of corrugated tube for ventilation seat

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