JPH0446166B2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention is mainly applicable to a chemical sprayer that mixes powder into air and sprays it, or a cleaning device that blows fallen leaves, volcanic ash, etc. from the ground. This relates to an air cleaner for an engine used in a place where chemicals, dust, etc. are scattered, such as the engine of a blower.

(b) Prior art and problems to be solved Conventionally, air cleaners used in this type of engine need to be large because they clog quickly. It was made of synthetic resin because it needed to be lightweight so that it could be carried on one's back during work. For this reason, the structure of the molding die becomes complicated, resulting in a disadvantage that the molding operation becomes troublesome.

(c) Means and effects for solving the problem The present invention provides an air cleaner by preheating fabric-like synthetic resin membranes stacked on top and bottom of a cylindrical cylinder with a filter built-in, and combining the air cleaner body with the air cleaner body. A cylindrical hollow mold part having a shape connected to the lid part in the axial direction is formed inside the mold, and an upper mold part and a lower mold part of the mold part divided by a plane including the axial center line are used to form the upper part and the lower part. This is done by so-called blow molding, in which the edges of synthetic resin films stacked on top of each other are crimped and sandwiched, and air is injected between the upper and lower synthetic resin films to form a shape that corresponds to the hollow mold section. This makes manufacturing easy and the structure of the mold simple.

(d) Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

1 to 6, 1 is a cylindrical air cleaner body made of synthetic resin, 3 is a lid portion that covers one end of the air cleaner body 1;
It is provided with a locking part 7 that is removably locked to a protrusion 5 that protrudes from the outer periphery. Conversely, the protrusion may be provided on the lid 3 and the locking portion may be provided on the air cleaner main body 1. 9 is a cylindrical filter made of porous sponge-like synthetic resin. The filter 9 has one end connected to a communication hole 11 of the air cleaner body 1 that communicates with a vaporizer (not shown), and the other end is closed by the lid 3. A plurality of support pieces 1 are held by the support pieces 1 and protrude into the air cleaner body 1.
It is supported by 3,13,... Reference numeral 15 denotes an intake hole that opens on the outer periphery of the air cleaner main body 1. A mold 17 is formed by being divided into an upper mold 19 and a lower mold 21, and has a cylindrical hollow mold part 23 formed inside. The hollow mold part 23 has a mold part 25 having a shape corresponding to the outer circumferential shape of the air cleaner main body 1 and a mold part 27 having a shape corresponding to the outer circumferential shape of the lid part 3 formed by a mold part 31 corresponding to the connecting part 29 . The mold 19 is formed continuously, and is divided into an upper mold 19 and a lower mold 21 by a plane including the axis. Further, a portion corresponding to the air intake hole 15 is formed in a shape corresponding to the shape of the bowl portion 33 that covers the air hole 15 and protrudes. One end of the upper mold 19 and the lower mold 21 is provided with a notch (not shown) into which a hollow needle 35 for press-fitting air is inserted.

In the above embodiment, cloth-like cylindrical synthetic resin films that have been softened by heating in advance are formed into flat plates stacked one on top of the other, and both ends of the membranes are connected to the upper mold 19 and the lower mold 2.
When the hollow needle 35 is inserted between the upper and lower synthetic resin membranes and air is forced in, the synthetic resin membrane is pressed against the hollow mold part 23 and molded. , cooled and hardened. Also, the portions pressed by the edge portions are brought into close contact. Open the mold 17 and take out the synthetic resin molded product from the connecting part 2.
9 to separate it into the air cleaner main body 1 and the lid part 3, and also cut off the end of the communication hole 11 and unnecessary parts of the end face of the lid part 3, and further cut off the bowl part 33 to open the intake hole 15. do. Next, a separately manufactured filter 9 is inserted into the air cleaner main body 1 and the lid portion 3 is locked.

FIG. 7 shows another embodiment of the filter 9, which has a polygonal cross section. Further, FIG. 8 shows a second embodiment of the present invention, in which a disc-shaped filter 37 is built-in. The molded product molded with the mold 17 is shown in FIG.
The air cleaner body 1 and the lid part 3 are separated by cutting. Further, FIG. 10 shows a third embodiment of the present invention, in which a large number of ventilation holes 41 are provided at the center of the interior of the air cleaner main body 1, and a communication hole 11 is provided at one end.
A central tube 43 with the other end closed is inserted, and a cylindrical filter 45 is fitted between it and the inner diameter portion of the air cleaner main body 1. After connecting the central pipe 43, the air cleaner main body 1, and the lid part 3 and molding them into one body as shown in FIG.
It was manufactured by cutting at No. 7,49.
In addition, in Figures 7 to 11, Figures 1 to 6
The same reference numerals as those shown in the figures represent the same components.

(e) Effects of the Invention Since the present invention has a manufacturing method or structure as described in the claims, the structure of the mold is simplified, the molding work is facilitated, and a large synthetic resin air cleaner can be manufactured. It can be manufactured easily and at low cost.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments as well. Further, the symbols shown in the claims do not limit the technical scope of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of one embodiment of the present invention, and FIG.
Figure 3 shows the - line and - line in Figure 1, respectively.
A front sectional view of the line, Figure 4 is a side sectional view during molding, and Figure 5 is a side sectional view of the line.
Figure 6 shows the - line and - line of Figure 4, respectively.
7 is a front sectional view showing another embodiment of the filter, FIG. 8 is a side sectional view of the second embodiment of the present invention, and FIG. 9 is a side sectional view when the same is molded. , 1st
FIG. 0 is a side sectional view of the third embodiment, and FIG. 11 is a side sectional view of the same molding. 1... Air cleaner body, 3... Lid, 9...
...Filter, 19...Upper mold, 21...Lower mold, 2
3...Hollow mold part.

Claims (1)

[Claims] 1 In a method of manufacturing an air cleaner comprising a cylindrical air cleaner body 1 having a built-in filter 9 therein and a lid part 3 which covers one end of the air cleaner body 1 so as to be openable and closable, A synthetic resin film is heated in advance, and a cylindrical hollow mold part 23 having a shape in which the air cleaner main body 1 and the lid part 3 are connected in the axial direction is formed inside the mold 17, and includes an axial center line. The upper mold 19 and the lower mold 21 of the mold 17, which are divided on a plane, press and clamp the edges of the synthetic resin films stacked one above the other, and pressurize air between the upper and lower synthetic resin films. A method for manufacturing an air cleaner, characterized in that the air cleaner is molded into a shape corresponding to the hollow mold part 23.