JPS60173108A - Production of swimming hat - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a camp-shaped swimming cap by using natural rubber or synthetic rubber as raw materials and molding these materials using a mold.

Conventional rubber swimming caps have generally been formed into a cap shape by adhering substantially fan-shaped rubber sheet pieces to each other using an adhesive. For this reason, it requires a large amount of manpower and time to manufacture, leading to a rise in manufacturing costs, and has the disadvantage that the bonded portion is easily damaged, the seam is easily visible, and the aesthetic appearance is impaired.

In addition, according to the above conventional example, since the elasticity of the peripheral edge and the top are the same, if this elasticity is reduced, it will easily fall off from the head (on the other hand, if the elasticity is increased, the tightening of the head will cause discomfort, which is a disadvantage). there were.

The present invention aims to eliminate the various drawbacks of the above-mentioned conventional examples at once, and a plate-shaped rubber material 3 whose peripheral portion 2 is made of a harder material than the central portion 1 is placed inside the female die 4 of the mold 7. After this, the male mold 5 of the mold 7 is fitted to the female mold 4, and heat vulcanization is performed to manufacture a swimming cap integrally molded into a camp shape.

Next, the present invention will be specifically explained based on the embodiment shown in the drawings. The rubber material 3 of this embodiment is made of a disc-shaped rubber material 3a made of a relatively soft material and a relatively hard material arranged around one outer periphery of the rubber material 3a. The annular rubber material 3b is arranged in mutual contact with the annular rubber material 3b, and the whole has a disk shape. These rubber materials 3a
, 3b are made of natural rubber or synthetic rubber. For example, in the case of silicone rubber, the amount of silica mixed in can be adjusted, and by increasing the amount, the hard rubber material 3b is made, and by decreasing the amount, the soft rubber material 3a is made. It consists of In the case of natural rubber, the hardness can be adjusted by increasing or decreasing the amount of carbon mixed in.

Further, these rubber materials 3a and 3b are mixed with a vulcanizing agent that causes thermal vulcanization at a temperature above a certain temperature.

As shown in FIG. 3, the rubber material 38.3b is arranged in the female mold 4 of the mold 7, which consists of a female mold 4 and a male mold 5, and a cap-shaped molding space 6 is formed between them when the two are combined. be done. After lowering the male die 5 to the state shown in FIG. 4, heat is applied to the rubber materials 3a and 3b, and the rubber materials 3a and 3b become molten and enter the molding space 6. The rubber materials 3a and 3b are expanded and fused together at the boundary to become a single body. Furthermore, rubber elasticity is imparted by the thermal vulcanization effect of the vulcanizing agent. The elasticity of this rubber is
, 3b, the peripheral portion 2a of the finished product A is large and the central portion 1a is small.

After cooling, the rubber materials 3a and 3b are spread out into a camp shape and are fused together to obtain a finished product A as shown in FIG. The heating temperature is 150°C to 1
70'C is preferred.

In the above embodiment, the thickness of the peripheral edge 2a of the finished product A is larger than that of the center part 1a, so that the elasticity of the peripheral edge 2a is further increased.

Further, in the above embodiment, a combination of two separately formed hard and soft rubber materials 3a and 3b was used as the rubber material 3, but it may also be constructed from a single plate-shaped rubber material.
At this time, by adjusting the amount of silica, carbon, etc. mixed in the peripheral portion and central portion of the rubber material, a predetermined hardness can be imparted to a predetermined location.

As a result of the present invention having the above configuration, a swimming cap can be efficiently manufactured using a mold. That is,
Similar to the conventional manufacturing method using molds, in which a plate-shaped rubber material is placed in a mold and heat-cured, swimming caps can be manufactured extremely efficiently and at low cost.

Although the swimming cap can be manufactured efficiently and at low cost, the present invention can produce the following effects.

That is, the swimming cap obtained by the method of the present invention does not have the risk of being damaged along the boundary line as in the conventional example, and does not have the drawback that the seam of the adhesive part is visible and spoils the aesthetic appearance.

Furthermore, according to the present invention, it is possible to manufacture a swimming cap with stronger elasticity by making the peripheral part harder than the top (center part), so that the swimming cap is less likely to fall off than the swimmer's head, and the top part is hard. Since it is soft and has low elasticity, it has the effect of not squeezing the swimmer's head and causing discomfort.

Furthermore, the present invention can solve the following problems.

In other words, the human head is generally shaped so that the part that touches the periphery of a swimming cap is slightly concave than the top, so it is necessary to make the inner diameter of the periphery of the swimming cap slightly smaller than the inner diameter of the upper part. do. However, when integrally molding a swimming cap using a mold, there is a problem in that it is extremely difficult to make the inner diameter of the peripheral portion smaller than the inner diameter of the upper portion. The present invention solves this problem by changing the rubber hardness of the peripheral edge portion and the upper portion of the swimming cap to create a difference in diameter reduction ratio due to rubber elasticity. Therefore, the swimming cap manufactured according to the present invention has the advantage of being worn in a state that always fits the swimmer's head.

As described above, the present invention is resistant to damage, has an excellent appearance, is worn while fitting the swimmer's head, has little risk of falling off during swimming, is comfortable to wear, and can be used for competitive swimming. Caps can be manufactured efficiently and at low cost.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a perspective view showing a swimming cap manufactured by the method of the invention, FIG. 2 is a perspective view showing an example of the rubber material used in the invention, and FIG. and FIG. 4 are cross-sectional views showing the manufacturing method of the present invention. 1−・−・−−−−−−・・・・−・・−・−m−−−
−・−Rubber material center part 2−・・・・・・・−・−・
−・・−・−・−Rubber material periphery 3 −−−−−・−
・・−・−・・−１−−−・−・・−・・Rubber material 4−
・・・・−・−1−−−−−−−〜−・−Female type 5 −−
−−−−−−−−1～・−・−・・・・・−・−・−・
−・Male type 7 ・・−・−・−−−−−−−−−−−−−
・－・・・－Mold agent Patent attorney Masaru Ishihara Figure 2 Figure 1 Figure 3

Claims (1)

[Claims] (1) After placing a plate-shaped rubber material with a harder peripheral edge than the center inside the female mold, the male mold is fitted with the female mold and heat vulcanized. A method of manufacturing a swimming cap, comprising manufacturing a swimming cap that is integrally molded into a cap shape.