JPS60183023A - Preparation of air cleaner element - Google Patents

Abstract

PURPOSE:To prepare an air cleaner element having a uniform filter pore size in the ridge, valley and flat parts thereof, by supplying a resin powder to a filter material formed into a crysanthemum like ring body by creasing while sucking the said resin powder to adhere the same thereto so as to reach the interior of each filter pore before curing the resin under heating. CONSTITUTION:A filter material is formed into a crysanthemum shape by creasing and the end parts thereof are sealed while end plates are secured to both ends by an adhesive to form a crysanthemum like ring body. This ring body is received in a resin supply apparatus 21 in a hermetical state and a fine thermoplastic resin powder is sprayed from plural nozzles 24 provided to the peripheral wall of said apparatus 21 while sucked by a suction apparatus 25. The resin powder is flowed to the ridge part and the valley part of the filter material, where a filter pore size becomes large and air passing resistance is low, at first and adhered to both parts but is not adhered to a place having a small filter pore size. When air passing resistance increases to a predetermined value, sucking is stopped and the ring body is put in a heating apparatus to melt the resin powder and the filter pore size of the whole of the filter body is made uniform.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an element of an air cleaner used in an internal combustion engine ξ.

The offing material constituting the element is made into a sheet by intertwining fibers, and the intertwining gap becomes the t-hole diameter. When air passes through this T hole diameter, the fibers capture and filter dust in the air. When the wood is flat, the diameter of the holes is roughly the same, but when folding it to make a chrysanthemum-shaped annular element, the fibers are folded by the blade of the folding machine. The tangles are weakened, and the fibers are bent 360 degrees to form chrysanthemum-like pleats and troughs, the fibers are untangled, and the open hole diameter becomes larger than that of the flat part. This reduces ventilation resistance and allows air to flow easily, allowing even relatively large-diameter dust to pass through without being captured or captured from the crests and troughs, reducing cleaning efficiency and causing wear to the internal combustion engine's cylinder. There is a risk.

For this reason, after passing through a pleat folding machine, a method is adopted in which the crests and valleys of the pleats are coated with resin to reduce the diameter of the pores and form elements. A state of large offshore hole diameter persists from the to the reverse side.

Since the velocity of the flow passing through the offshore timber is the fastest, the dust trapped on the surface side is also forced into the interior and easily carried away, resulting in the above-mentioned drawbacks not being resolved.

The present invention provides an air cleaner element that eliminates such drawbacks.The present invention is to provide an air cleaner element that eliminates such drawbacks. Thermoplastic resin powder is supplied from the outer circumference while suctioning until a predetermined pressure loss increases,
A manufacturing method in which the resin is then cured by heating, and the resulting element has a uniform ib pore diameter in the crests and troughs and the flat part in between, which has good cleaning efficiency. It is. Examples will be explained below.

The element 1 in FIG.
It is manufactured through the following three steps. In the first step, the fi overfill material 2 is folded (=J to form a rectangle) by pleats tFiti.
Around the porous inner cylinder 6 I (arranged in a chrysanthemum shape and sealing the ends, end plates 7 are arranged at both ends and fixed with adhesive to form a chrysanthemum-shaped annular body.The second step is the first The chrysanthemum-shaped annular body formed in the process is adsorbed with resin powder at a number 21 as shown in FIG. The container Eff 27 is housed in a cylindrical resin supply device 22 having a lid 26 to make it airtight, and is connected to the nozzle 24 while sucking 5.'.
Spray fine thermoplastic resin powder from The thermoplastic resin powder is, for example, polyethylene powder with a particle size of about 3 to 5 μm. When sprayed, the resin powder untangles the fibers, increases the pore diameter, and creates pleated peaks 3 and valleys 4 with low ventilation resistance.
As shown in FIG.
The filter material 2 in the flat part 5 between the pleats 3 and the valleys 4 has high ventilation resistance and does not flow in large quantities, but due to the large pore diameter in the flat part 5, In this case, the resin powder will adhere to the inside of the open frame, but if the hole diameter is small, the resin powder will not adhere to the inside.When the ventilation resistance increases to a predetermined value, suction is stopped.

In the third step, the annular body coated with resin powder in the second step is placed in a heating device such as a hot air oven and heated to 120°C to 150°C.
The thermoplastic resin powder adhering to the inside of the filter medium 2 is melted by heating for 2 to 3 minutes at a low temperature.

When the resin powder is in the large pore diameter of the pleated ridges 3, troughs 4, and flat portions 5, it is melted by heat and sticks to each other as shown in No. 41!21, covering the entire surface of each fiber 31. A void is created only in the central part 42 between the fibers, and the l of the entire Okishutai 2 is created.
Make the pore diameter approximately uniform.

In the element manufactured through the first to third steps in this manner, air containing dust is captured by the filtering material 2 and purified. The element is the l of the pleat ridges 3 and troughs 4.
Since the hole diameter is the same as the l hole diameter of the flat part 5, the ventilation resistance and flow velocity are the same in all parts, and dust is captured equally.

As mentioned above, the present invention uses a chrysanthemum-shaped annular filter material, and after allowing the resin powder to adhere to the inner pores of the filter material, which have large pore diameters, melts the L7 resin by heating to reduce the pore diameter. Therefore, this manufacturing method can reliably reduce the diameter of the pores, even those that have become larger due to the disentanglement of the fibers.

[Brief explanation of drawings]

Figure 1 is a partial perspective view of an air cleaner element;
FIG. 2 is a sectional view of the resin supply device, FIG. 3 is a diagram showing how the resin powder adheres between fibers, and FIG. 4 is a diagram showing how the resin adheres after heating. 1...Element 2...Filtering material 3.
...Fold mountain part 4...Fold valley part 5...
... flat part 21 ... resin supply device patent applicant Tsuchiya Seisakusho Co., Ltd. 22 Fig. 23 Fig. 4

Claims (1)

[Claims] A process of forming a chrysanthemum-shaped annular body by folding the Okinawa wood into a chrysanthemum-like shape and fixing both ends with end plates, and disintegrating the formed annular body into a resin supply device to increase thermoplastic resin powder from the outer periphery by a predetermined pressure loss. A method for manufacturing an air cleaner element, which comprises a step of adsorbing the material until the material is absorbed, and then a step of heating the material with a heating device.