JPS59152822A - Blow molded item with cylindrical anchoring section and manuacture thereof - Google Patents

Abstract

PURPOSE:To obtain a blow molded item with the main body connected through a solid connecting section to an anchoring section, by using a mold that has a special stcture for forming said connecting section when the hollow main body, the cylindrical anchoring section and their connecting section are monolithically to be blow molded. CONSTITUTION:After a melt (parison) 12 is suspended in split type molds 11 that includes a cavity 14 with a configuration corresponding to the hollow section 5, the connecting section 4 and the cylindrical anchoring section 3, and having cylinders 15 each with a cylinder 15, the molds 11 is closed with the parison 12 between them, and a pressurized fluid is introduced. Then the cylinders 15 are actuated to project projecting plate 16 until the connecting section becomes solid, so that the connectection 4 is formed and the intended molded body can be obtained. USE:As holders or the like for codes, pipes, etc. arranged in an engine room of an automobile.

Description

[Detailed Description of the Invention] This relates to a manufacturing method, and more specifically, it relates to a method in which a stop portion and a hollow molded body are integrally connected during molding, and this connected portion is made solid to strengthen it. The present invention relates to a hollow body having a characteristic cylindrical stop portion and a method for manufacturing the same.

2. Description of the Related Art Conventionally, various cords and linear objects such as knobs are present in the engine room of an automobile. Particularly in recent years, automobiles have been equipped with electrical equipment and are packed with linear objects. Although these wires have excellent physical properties, it is undesirable for them to come into contact with parts that generate high heat in the engine room, so several of these wires are usually bundled together. are united in These bundled linear objects are functionally organized in holes provided at appropriate locations. In this type of pole goo, a mounting hole is bored at a proper place in the engine room, and the legs of the hall goo are inserted into the hole and fixed. However, such a hole goo is weak against the pulling force of a linear object, and the legs of the hole goo often come off, causing accidents and malfunctions in practical use.

In addition to these direct defects, it also has the disadvantage of an increase in the number of parts or processes.

In order to improve the above-mentioned drawbacks, the present invention provides a hollow molded product, which has been frequently used in automobile parts, etc. in recent years, by integrally providing a continuous stop part, and at the same time, by making this continuous part into a solid shape. The object is to provide a hollow part with a strong stop.

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a hollow body having a cylindrical stop according to the present invention. This hollow body consists of a hollow body λ, a stop portion 3, and a connecting portion q that connects these two members. The connecting part 3 has a solid shape and firmly connects the hollow part main body and the stop part 3. The hollow part body 3 and the stop part 3 each have a hollow part inside, and the shape of the hollow part is determined depending on the shape of the part through which the hollow part passes. The hollow portion 7 of the stop having a circular cross section as shown in FIG. 1 is suitable for holding a pipe or a bundle of electrical system cords.

However, the cross-sectional shape of the hollow portion 7 of the stop portion is not limited to a circle, but may be an ellipse or a polygon depending on the case.

The hollow body λ is not limited to a cylindrical shape as shown in FIG. 1, but may also be angular or have a structure made up of several cylinders. For example, if the hollow main body λ is used as an air conditioning duct, hot air and cold air can be efficiently transmitted by using a structure that combines several tubes as shown in the figure. Furthermore, if the hollow main body unit is made into a container having an opening, not only one that functions as a duct as shown in FIG. 1, it is possible to provide a stop for various tanks.

Next, the manufacturing method of the above embodiment will be explained with reference to FIGS. 2 to S. As shown in Figures 2 and 3, the split mold //,
Between //, a melt of plasticized thermoplastic synthetic resin, Paris Noah 2, is suspended, and a split mold is formed between //,
Parison / at the position where it passed through the cavity /
, 2 stops drooping. The inner surface of the split mold //, // has the external shape of a hollow body/ having a stop part inside the cavity//.
I have a lot of things. The cavity/11 has a cylinder/S
A protruding plate connected to / B is a cavity / 11. G is configured so that it protrudes inward. In this process of hanging down the ballison/2, the protruding plate/2 is held within the one-part mold without protruding into the cavity (1/2).

Next, as shown in FIG. 9, the divided molds //, /, / are closed, the ballison /2 is held between them, and a pressurized fluid such as compressed air is supplied using a blowing button (not shown). Then the cylinder/
Activate the left side to make the protrusion plate/B protrude until it fills the cavity space corresponding to the continuous part, and weld and integrate the nozzle of the continuous part. Then, after cooling the parison,
The mold is opened and the mold is removed to obtain a blow-molded product having a cylindrical stop according to the present invention.

The hollow molded article having a cylindrical stop part of the present invention is a hollow body having a cylindrical stop part consisting of a hollow part main body, an upper part, and a connecting part connecting these two parts, and in particular, Since it is a hollow body with a stop part that is solid and connects the hollow part main body and a cylindrical stop part, the stop part does not separate from the hollow body and securely holds the linear member. can do.

Furthermore, since the continuous portion is solid, the stop portion itself has high strength against bending and twisting.

According to the manufacturing method of the present invention, the cylindrical upper part can be manufactured integrally during molding of the hollow body, and the connecting part between the cylindrical upper part and the hollow body is extremely resistant to external forces. It has the characteristic of being strong.

Furthermore, the manufacturing method of the present invention has the advantage that it can be manufactured and assembled four times more easily than conventional hole gourds by blow molding (σ).

As described above, the present invention is a hollow body having a cylindrical stop portion provided with a solid, . It has the two features of being able to hold the parts, and of making it possible to easily and reliably integrate the continuous parts into a solid shape by G-welding using the pressure contact plate during blow molding.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of an embodiment of a hollow body without a cylindrical upper part according to the present invention, and Figs. Fig. 2 is a cross-sectional view showing the relationship between the parison and the mold before mold clamping, Fig. 3 is a cross-sectional view taken along line A-A in Fig. 2, and Fig. 9 is a cross-sectional view showing the relationship between the parison and the mold before mold clamping. The cross-sectional view and FIG. S are cross-sectional views when the pressure contact is completed using the pressure contact plate. /Hollow body with a cylindrical stop dHollow part main body 3Cylindrical stop GConnection part SHollow part
//Divided mold/Otsu pressure contact plate Patent applicant Kyoraku Co., Ltd. Figure 1 Figure 2 Yu 3 Figure 4 Figure 5

Claims (1)

[Claims] (1) A cylinder consisting of a hollow main body, a cylindrical stop protruding from the outer surface of the hollow main body, and a continuous part connecting these parts, the continuous part being formed in a solid shape. A blow molded product with a shaped stop. (, 2) The hollow part body, the cylindrical stop part protruding from the outer surface of the hollow part main body, and the connecting part that connects these parts have external shape V (in its cavity, and the cavity of the connecting part has In this method, a split-type mold having a protruding plate that can slide in the mold clamping direction is placed at an appropriate interval with the protruding plate retracted, and then, after hanging a ballisne between the molds, the mold is closed. A cylindrical stop part characterized in that the parison is closed and pressurized fluid is blown into the inside of the barison to form a hollow part body and a stop part, and then the protruding plate is protruded and the parison constituting the continuous part is welded and integrated. A method for producing a blow molded product.