KR101824732B1 - Inversible air fender - Google Patents

Abstract

The present invention relates to a method of manufacturing an inverted air fender, and more particularly, to a curved surface forming drill having a curved surface formed on one side thereof and a cylindrical outer diameter assembly for inserting a body portion of the curved surface forming mandrel, A first step; A second step of inserting an inner flange into the mandrel assembly surface;
A third step of forming a rubber layer on a surface of the mandrel assembly; A fourth step of reversing the rubber layer after the formation of the rubber layer to form an integral molding; A fifth step of injecting air into the integral molding and attaching the air into the mold to vulcanize the mold; .

Description

≪ Desc / Clms Page number 1 > INVERSIBLE AIR FENDER <

The present invention relates to an inverted air fender and a method of manufacturing the same.

The present invention relates to a manufacturing method and a shape of an inverted air fender. In the conventional air fender, the left and right symmetrical half fenders of the same shape are formed on the mandrel, respectively, and then connected to the mold by manual operation from the outside, and the steam is injected and heated and pressed.

1 to 4 show a conventional working method. In FIG. 1, the inner surface rubber 5, the reinforcing cloth 06 and the outer surface rubber 7 are formed stepwise in the conventional mandrel 16, (3) is inserted, and is ejected using the eyebolt (17) for ejection. In this way, two half assemblies 1 having the same shape as the left and right as shown in Fig. 2 are formed. The half assemblies 1 produced in FIG. 2 are joined to each other to face each other as shown in FIG. At this time, as shown in FIG. 4, one side should be inserted into the other side for joining two half assemblies, and the end of the half assembly (1) should be flatly inserted. Thus, the two half-pieces of the assembly are connected and formed by the reinforcing cloth and the padding rubber (14). 3 is charged into the mold 4 of FIG. 5 and is vulcanized with high-temperature steam to complete the product. In the case of working in the conventional manufacturing method, two half assemblies are joined to form a pedestal So that the connection part of the joint is incompletely joined to cause a failure due to leakage of steam at the steam injection part. In order to make the half assembly 1, All of the inner flanges 3 have to be inserted, which causes an increase in the material cost during molding

In order to solve the above problems, the assembly 01 is pulled out from the conventional mandrel 16, and instead of connecting the two without the fixing base, the connection operation is completed on the improvement mandrel 10 serving as the fixed base The inner flange 3 is applied only to one half assembly 01 and the other half assembly 01 is manufactured by pulling out the inner flange 3 without using the inner flange 3, There is a need for a method of manufacturing air fenders.

SUMMARY OF THE INVENTION In order to solve the above-described problems, it is an object of the present invention to provide a method of providing a cost-saving air fender.

In addition, the old half assembly 01 is pulled out from the bobbins 16 to join the bobbins on the bobbins 10 instead of connecting them without a fixing table, thereby eliminating the connection defects, and both of the former half assemblies 01 The present invention provides a structure and a working method of the air fender in which the inner flange 3 is inserted into only one of the assemblies other than the manufacturing method in which the inner flange 03 is inserted into the inner flange 3. When the integral molded product 9 is inverted, The outer rubber 6 is formed first and the inner rubber 05 is formed later in the initial molding as the rubber 6 is reversed, and the integral molding 09 is assembled to the inner flange 03 And the other is a process of processing the excretory reinforcing cloth 15 without an inner flange and pulling the reinforcing cloth 15 toward the boss to form the shape of the integral molding as shown in FIG. 12, and mounting the integral molding shown in FIG. 12 on the mold of FIG. By steam It is aimed to present the process of vulcanization.

In order to accomplish the above object, there is provided a method of manufacturing an inverted air fender, which comprises assembling a curved outer surface assembly having a curved surface mandrel having a curved surface on one side and a cylindrical outer surface of the curved mandrel, A second step of inserting an inner flange into a surface of the mandrel assembly, a third step of forming a rubber layer on a surface of the mandrel assembly, a step of inverting the rubber layer after molding the rubber layer, And a fifth step of injecting air into the integral molded product and mounting it in the mold to vulcanize the integrated molded product.

In the third step, the rubber layer may be one in which the outer rubber is first formed, the inner rubber is formed later, and the rubber layer is inverted after molding. And the step of forming the outer side of the inner flange without the inner flange only with the pulling-out reinforcing cloth. Further comprising the step of forming a reversing space by extracting the mandrel outer diameter assembly to facilitate the reversal.

According to the present invention, as compared with the operation of connecting two conventional half assemblies (1), it is possible to reduce the defective rate of products by working with the integral molded product (09), and conventionally, the half assembly (2), and a single step of connecting the two molds (3). However, according to the process of the present invention, the integral molded product (9) is completed through only one step Save time and cost in production. According to the present invention, it is possible to omit the inner flange (03) inserted into one side of the air fender, thereby reducing the material cost.

Figs. 1 to 4 are views showing the configuration of a conventional fender
5 to 12 are diagrams showing an embodiment according to the present invention

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. The air fender according to the present invention is formed through the following procedure. FIG. 13 shows a flow chart of the air fender.

First, in step S1, the curved surface forming mandrel and the outer diameter assembly steel pipe are assembled to form an improved mandrel. In step S2: the improvement drill bit is coupled to the rotary molding machine to prepare the fender-integrated molded work. In step S3, the outer rubber, the reinforcing cloth, the inner rubber, and the inner flange are molded in order to form one piece of the integral molded product. In step S4, the steel pipe of Teflon-coated outer- In step S6, if the curved surface forming drum is drilled at the side of the drill, the rubber, the reinforcing cloth and the outer surface rubber are collected to complete the integral molding. In step S7, the integral molding is separated from the integral molding. In step S8, the integral molding is poured on both sides and then air is injected thereinto to maintain the shape. In step S9, the integral injection molding is poured into the mold to inject the steam. The disassembled air fender is dismantled after the mold is dismantled.

The curved surface forming drill 11 and the mandrel outer diameter assembly 12 shown in FIG. 8 are assembled first to construct the improvement mandrel 10, wherein the straight portion of the curved surface forming drill 11 The diameter A1 is configured to be smaller than the curved surface diameter A2 and the curved surface forming drill 11 has a length that is about 1.5 to 2 times longer than the conventional mandrel or 70% (09) than the conventional half assembly (01), and is made to be reversible

The inner diameter A3 of the mandrel outer diameter assembly 12 is formed to be slightly larger than the outer diameter A1 of the linear portion of the drill 11 so as to maintain the clearance and to facilitate extraction before the reverse operation, The outer diameter A4 of the outer peripheral surface 12 is made equal to the outer diameter A2 of the curved surface forming drill 11 so that there is no outer step of the product.

The improvement drill 10 assembled as described above is coupled to the rotary molding machine so that the improvement drill 10 can be rotated by torque of the rotary molding machine. At this time, since the length of the improvement drill 10 is long, By adding support bearings at the mid-point of the drill, it is possible to prevent downward collapse or irregular rotation when the drill is rotated

7, the molded product into which the inner flange 3 is inserted is molded in the same manner as the conventional method of manufacturing the half assembly 1, wherein the inner flange is made of metal and the inner flange outer diameter is 20 %. In Fig. 1, the molding process of the inner rubber 5 and the outer rubber 7 is performed in the reverse order to that of the previous half assembly 1. This is because when the reversing air fender is manufactured, the inner rubber comes out and the outer rubber comes inward. Therefore, the outer rubber is first molded in consideration of the initial molding.

10, the molding length L1 of FIG. 8 is formed to be half of the length of the product in the past, but in this patent, the product length As shown in Fig.

The outer rubber 7, which is first formed, is formed of rubber having wear resistance and weather resistance in consideration of the conditions at a later stage. The reinforcing cloth 6, which maintains durability and pressure resistance of the air fender, Followed by doping (DOPPING).

The inner rubber 05 uses a rubber having good adhesion and good spreadability so as to maintain the adhesive force with the reinforcing cloth and spread well so as to prevent the air inside the fender from leaking. And then exfoliates the outer diameter assembly 12 made by the improvement drill assembly 10 in order to perform the reverse operation.

At this time, Teflon coating is applied to the outer surface of the outer diameter assembly pipe (13) to facilitate the extraction.

As shown in FIG. 10, when the drill 10 is pulled out and taken out from the outer diameter assembly 12, a reverse clearance space of t2 is generated. If there is no inversion gap as much as t2, there is no space where the integral forming end can be inverted, so that the inversion is impossible. In order to facilitate the inversion, the adjustment bend (08) of # 1, # 2, and # 3 is pre-filled before reversing to perform the reverse support. The adjustment band 08 is released in the order of # 1, # 2, and # 3 after being reversed in the backward direction

6 shows that only the # 3 adjustment band 8 remains and the inversion is performed. The amount of reversing is inverted until the end of the integral molding 9 is inverted to about half of the curve forming drum 11-2. As shown in Fig. 6, when the integral molding 9 is inverted, the surface adhesion may occur due to the contact between the inner rubber 5 and the inner rubber, so that adhesion prevention treatment is performed to prevent adhesion between the rubber.

It is possible to transmit force when pulling both sides as shown in Fig. 11 by further padding the reinforcing bobbin 15 collected at the central portion of the curved surface forming mandrel 11 while reversing the end portion of the integral molded product 09. [

The foot reinforcing cloth 15 gathers a plurality of tire cord sheets having a width of about 5 to 10 cm and collects them in the center. At this time, the foot reinforcing cloth (15) is formed before the reinforcement (06) of the main body so that the reinforcement (06) can receive the force when both ends are extracted. The foot reinforcing cloth 15 makes a hole in the central portion of the main body reinforcing cloth 06 by about 50Φ and pulls it out through the hole. In the integral molding 09, the improvement drill is separated to leave only the integral molding 09 as shown in Fig.

The integral molding 09 is pulled out from both sides to hold the shape illustrated in Fig. At this time, since the inner flange 03 is formed on the inner side of the integral molded product 09 and the reinforcing boss 15 for blowing is formed on the other side without the inner flange 03, (17) and pulling the other one of the foot reinforcing cloths (15) to hold the shape. The integral molded product 09 illustrated in FIG. 12 is injected with air to maintain a taut shape and is mounted inside the mold for vulcanization 04. At this time, one of the vulcanized molds 04 has a curved surface inclined portion and a straight portion BOLT- And one side is constituted only by a curved surface inclined portion and separated from the ↓ G side in Fig.

The integral molded product 09 is first inserted into a mold having a curved surface inclined portion and a straight line portion combined with each other, and then a curved surface inclined portion serving as a lid is placed thereon to complete the vulcanized mold assembly by the bolting operation.

When the vulcanization mold assembly is finished, the vulcanized steam is injected into the inside to heat and press it. Until the completion of the vulcanization, the integral molding (09), which is supplied with steam based on the standard flow time, is dismantled after the mold is dismantled and injected with air to check the leakage and appearance.

01: molded half-assembly in mandrel
02: Connecting body connecting two half assemblies
03: inner flange 04: vulcanization mold
05: Inner rubber 06: Reinforcing cloth
07: Outside rubber 08: Joining band
09: One-piece molding 10:
11: Curved surface forming part
12: mandrel outer diameter assembly
13: Outer Diameter Assembly STEEL PIPE
14: Reinforcing cloth, overburden rubber 15: Reinforcing cloth for throwing
16: Conventional make-up 17: Foot-operated eye bolt
18: Anti-adhesive vinyl
A1: Outside diameter of straight portion of curved mandrel
A2: Curved outer surface of the curved mandrel
A3: inner diameter of mandrel outer diameter assembly
A4: outer diameter of mandrel outer diameter assembly
E: Shaft of surface forming mandrel
L1: Body length of curved mandrel
# 1, # 2, # 3: Sequence of band for adjustment in reversal

Claims (5)

A method of manufacturing an inverted air fender,
A curved surface portion having a curved outer surface and a curved surface forming portion having a straight outer surface of a cross section cut along a surface passing through the rotation axis,
A first step of assembling a cylindrical mandrel outer diameter assembly (12) to be inserted into a straight portion of the curved part forming mandrel (11) and constituting the improvement mandrel (10);
A second step of inserting an inner flange on the surface of the improvement drill 10;
A third step of forming a rubber layer on the surface of the improvement drill 10;
A fourth step of reversing the rubber layer after the formation of the rubber layer to form an integral molding;
And a fifth step of injecting air into the integral molded product and mounting it in the mold to vulcanize
The diameter A1 of the straight portion is smaller than the diameter A2 of the curved portion and the inner diameter A3 of the outer diameter assembly 12 is larger than the outer diameter A1 of the straight portion and the outer diameter A4 of the outer diameter assembly 12 is only the curved portion Is equal to the outer diameter A2 of the drill 11
The rubber layer of the portion to be inverted in the third step is formed by first forming the outer surface rubber, forming the inner surface rubber later, and forming the inner surface rubber first,
Further comprising the step of removing the mandrel outer-diameter assembly (12) between the third and fourth steps for reversing to form a reversal space
Further comprising the step of installing the fastening band after the inversion in the fourth step
Further comprising the step of shaping only the initial reinforcing foam with one flange being inserted and the other flange omitted.
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