JPS6111204A - Manufacture of jig for curved rubber hose - Google Patents

Abstract

PURPOSE:To obtain a precise and inexpensive jig for manufacturing a curved rubber hose by a method wherein a core made of curved metallic round bar is inserted into a cylinder of rubber hose to make a master model, the external circumferential points forming the horizontal locus of the profile of the master model are continued to make generating lines along the axis and the male and the female mold of urethane rubber are molded by the matrix lines. CONSTITUTION:A tube 3 of green rubber hose having a specified length is inserted into the specified position of the core 2 made of curved metallic round bar vulcanized to provide a master model 10. One end section of the master model 10 is arranged horizontally along the axis and matrix lines 3a along the axis are scribed by connecting horizontal external circumferential points of the profile. The male mold 100 is formed with paper clay material 4 after the half circumferential surface under the matrix lines and the female mold 6 of urethane rubber are provided by filling the space of the molding box 5. The wooden reinforcing plate 7 is fixed to the rear of the female mold 6, while the female mold 6 is cut to the thickness of the basis length of the tube body 3 with a - tolerance from both end steps formed by both ends of the tube body 3, then, is stuck to the cutoff surface of the back plate 8 having the similar shape and the equal thickness to the cutoff surface and further stuck to the back plate 9 having the thickness of the basis length of the tube body 3 with a + tolerance thereby providing the jig.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is for inspecting the shape of curved rubber hose products bent in two or three dimensions, and for finishing cutting the ends of curved rubber hose products. Pertains to a jig manufacturing method.

This jig is used for hose companies, automobiles, etc. that require this jig, and in particular, it is a curved rubber hose vulcanized using a mandrel.

[Prior art]

Conventionally, the method for manufacturing a jig for finishing cutting the ends of this type of curved rubber hose or inspecting the shape and dimensions of the curved rubber hose has been carried out according to the drawings of the double-curved rubber hose product.
As shown in FIG. 9, the straight section 1 of the drawing of the hose product
For each curved section, a large number of wooden mold pieces (21) of various types are made from wood, and by assembling these pieces into blocks 9 according to the predetermined bending angle, the desired curved rubber hose can be inserted from the top. A groove (2) into which the lower half of the outer circumference of the curved rubber hose can be fitted.
2) A method for manufacturing a wooden jig (2o) for a curved rubber hose is known.

However, the conventional method for manufacturing the water jig (20) for a curved rubber hose has the following drawbacks.

That is, according to the conventional method for manufacturing the wooden jig (20).

It was necessary to process a large number of wooden mold pieces (21) one by one from wood, stack them into blocks, and assemble them to form the desired groove (22).Also, it was necessary to form them according to the product drawing. The concave groove (22) is substantially difficult to fit with the curved tube rubber hose product at the 9-bend portion, so it is difficult to modify the concave groove (22) by applying padding or cutting to the inner surface of the concave groove (22). It was necessary. In other words, curved tube rubber hose products that are vulcanized and molded by inserting and arranging an unvulcanized rubber cylindrical body into a mandrel are compounded with rubber at the time of molding.

Due to the structure of the hose, especially at the curved part of the hose, the inner curved side is thicker and the outer curved side is thinner.
It takes a lot of time and effort to process the raw wooden mold pieces (20), assemble them, and correct the concave grooves (22) after the second assembly to avoid the uneven thickness and flatness characteristic of various types of hoses. jig(
20), the production lead time for the wooden jig (20
) had the disadvantage of being expensive.

[Problem that the invention seeks to solve]

The present invention was devised in view of such circumstances.

The object of the present invention is to provide a method for inspecting the dimensions and shape of a curved rubber hose and manufacturing a jig for a curved tube.

It is something.

[Failure to solve the problem]

The present invention first involves manufacturing a desired curved rubber hose.
A metal tip rod having a desired outer diameter is bent to form a core body, an unvulcanized rubber hose cylinder is inserted into the core body, and then an integrally vulcanized master mold is formed. After that, the end of the prototype is horizontally arranged along the axis, and the outer circumferential points forming the horizontal traces of the contour of the nine prototypes are continuously set as generatrix lines along the axis.

The lower half circumference of the lower half of the lower part of the generatrix is covered with a clay material to form a male mold, and the outer periphery of the clay material is surrounded by a mold to form a female mold with respect to the male mold. This is a method for manufacturing a jig for a curved rubber hose, in which a urethane rubber material is injected into a urethane rubber material and molded into a female mold made of urethane rubber having a groove having a substantially semicircular cross section.

〔Example〕

Below, nine embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a jig for a curved rubber hose according to an embodiment of the present invention, and first, as shown in FIGS. 3 and 4,
To form a desired curved tube rubber hose, such as manufacturing a desired curved tube rubber hose product.

A metal tip rod (1) having a desired length and a desired outer diameter is 08
After forming the core body (2) by bending using a zero bending machine, as shown in FIG. A rubber hose cylinder (3) of a desired length is inserted into a predetermined position, placed in a vulcanizing can, and integrally vulcanized by applying heat and time to form a master mold (10).

Next, as shown in FIG.
A generatrix line (3a) that continues along the axis of the outer circumferential points that form the horizontal trace of the outline of 0). Male type (10
At the same time, the outer periphery of the molding (100) is raised and surrounded by a box-shaped wooden formwork (5). A viscous urethane rubber material made by kneading a hardening agent into a urethane material mainly composed of Incyanate e is poured into the cavity in the mold (5), and the mixture is heated at room temperature or in a hot air oven for a period of time. to complete the crosslinking. As a result, a urethane rubber female mold (6) having a JIs-A hardness of 65 to 90 was formed, and the urethane rubber female mold (6) was formed.
6) is separated from the formwork (5) and the male mold (100) and
As shown in the figure, it is molded into a female mold made of urethane rubber having a groove (6a) with a substantially semicircular cross section.

Thereafter, the wooden reinforcing plate (7) is brought into contact with and fixed to the back side of the urethane rubber female mold (6), and the urethane female mold (6) is formed by both ends of the hose cylinder (3). Stepped portions (6b) at both ends (6b)
3) After cutting to a wall thickness with an allowable (-) tolerance for the standard length of 3), cut a first piece with the same shape as the cut surface and with a thickness equal to the wall thickness of the allowable (-) tolerance. Our board (8
), (8) are brought into contact with the cut surface and fixed with adhesive, and further, the tolerance (+) for the reference length of the hose cylinder (3) is attached to the outer surface of the first contact plate. This is a method of manufacturing a jig for a bent pipe rubber hoist, in which second contact plates (9), (9) having a wall thickness that meets the tolerance are brought into contact and fixed with adhesive.

In addition, preferably the first back plate (8) and the second back plate (9)
It is done in a different way. That is, the bent tube rubber hose jig according to this manufacturing method is used as a jig for inspecting the shape, length, etc. of a nine-bent tube rubber hose product. Also, the reinforcement plate (
In 7), since the urethane rubber female mold (6) has flexibility, the urethane rubber female mold (6) is reinforced in order to increase the rigidity of the one-bent rubber hose jig.

Next, another embodiment of the present invention will be described. FIG. 2 is a perspective view of a bending rubber hose stem according to another embodiment of the present invention, and hereinafter, the same parts as in the drawing of the embodiment described above are given the same reference numerals, and the same parts are the same. Only the differences will be explained with reference to the drawings.

Both ends of the urethane rubber female mold (6) formed as described above are cut to a certain thickness inward from the stepped portions (6b), (6b) formed by both ends of the rubber hose cylinder (3). , a first backing plate (8
1) and (81) are brought into contact with the cut surface and fixed with adhesive, and further, a space approximately equal to the thickness of the knife (not shown) is placed on the outside of the contact plate (81) and (81). This is a method for manufacturing a jig for a curved rubber hose, in which a second backing plate (91), (c+t) is installed by standing upright from a reinforcing plate (7). A jig for a bent rubber hose according to this manufacturing method is made by fitting a nine-bent rubber hose product into a groove (6a) provided in the jig, and then inserting a knife along the above-mentioned interval to tighten the end of the nine-bent rubber hose product. It is used as a jig for cutting to the desired length.

[Effect]

Next, the effects will be explained. Since the present invention is a method for manufacturing a jig for a curved rubber hose as described above, there are 9 types (10
) is molded to produce the desired curved rubber hose product. Therefore, it is possible to manufacture a curved rubber hose jig with excellent precision, and it is possible to manufacture a jig for a curved rubber hose with excellent precision. In addition, there is no need to perform a correction process to correct the concave grooves after the wooden mold pieces are assembled. In addition, the male mold (100) is made by applying the paper clay material (4) to the original mold (10), so it is necessary to process the wooden mold piece or make it 1.
Does not require highly skilled assembly skills. Further, the urethane material has excellent castability, can be injected immediately after molding into an male mold (ioo), and has excellent demoldability.

Therefore, according to the present invention, as a jig for inspecting the shape and dimensions of a single curved rubber hose or for finishing cutting the end of a curved rubber hose, a jig for a curved rubber hose with excellent precision can be used in a short length. We can provide a method for manufacturing on time and at a reasonable price.

In addition, when multiple curved rubber hose jigs are required, the M-type (IOO) can be reused twice, so the jig manufacturing delivery time can be further shortened, and the manufacturing cost can be further reduced, making it valuable for industrial use. is a great thing.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a jig for a curved rubber hose according to an embodiment of the present invention, and FIG. 2 is a perspective view of a jig for a curved rubber hose according to another embodiment of the present invention. 3 to 8 are perspective views for explaining the present invention, and FIG. 9 is a perspective view of a conventional example. DESCRIPTION OF SYMBOLS 1... Metal round bar, 2... Core body, 3... Rubber hose cylinder body +3a... Bus bar, 4... Clay material, 4a.
...outer circumference. 5...Formwork, 6...Urethane rubber female mold, 6&...
・Groove. 6b... Stepped portion, 7... Reinforcement plate, 8... First backing plate, 9... Second backing plate, 10-... Master model, 20-... Male mold Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 6 Iia'' Figure 8 Figure 9

Claims (4)

[Claims] (1) To manufacture a desired curved rubber hose, a metal round rod having a desired outer diameter is bent to form a core, and an unvulcanized rubber hose cylinder is inserted into the core. After that, an integrally vulcanized master mold is formed, and then the ends of the master mold are arranged horizontally along the axis, and the outer circumferential points forming the horizontal trace of the outline of the master mold are continuously aligned with the axis. A generatrix along the center, a lower half circumferential surface substantially below the generatrix is covered with a clay material to form a male mold, and the outer periphery of the clay material is surrounded by a mold so that a female mold can be formed with respect to the male mold, 1. A method for manufacturing a jig for a curved rubber hose, characterized in that a urethane rubber material is injected into the hollow space of a mold and molded into a female mold made of urethane rubber having a groove having a substantially semicircular cross section. (2) A reinforcing plate is brought into contact with and fixed to the back side of the urethane rubber female mold, and the urethane rubber female mold is made to have a desired wall thickness from at least one end step formed by both ends of the hose cylinder. After cutting, a first backing plate that has approximately the same shape as the cut surface and a thickness equal to the desired thickness of the cut surface is brought into contact with and fixed to the cut surface, and is further attached to the outside of the first backing plate. Second
A method for manufacturing a jig for a curved rubber hose according to claim 1, further comprising a backing plate. (3) The wall thickness at which the urethane rubber female mold is cut is within the allowable (-) tolerance for the reference length of the hose cylinder, and the wall thickness of the first backing plate is within the allowable (-) tolerance. It is thick and
Claim 2, characterized in that a second contact plate having a wall thickness within an allowable (+) tolerance with respect to the reference length of the hose cylinder is abutted and fixed to the outer surface of the first contact plate. A method for manufacturing a jig for a curved rubber hose as described in . (4) A jig for a curved rubber hose according to claim 2, characterized in that a second backing plate is provided upright from a reinforcing plate at a constant interval on the outside of the first backing plate. manufacturing method.