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Propeller fan and manufacturing method thereof

A propeller and fan technology, applied in the propeller fan and its manufacturing field, can solve the problems of poor strength, cracks, blade breakage, etc., and achieve the effect of improving strength and durability

Active Publication Date: 2015-11-25
FUJITSU GENERAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the propeller fan 101 is rotated, a crack may be generated in the blade root 200 in the direction of the blade root 200 due to a force applied to the blade root 200. If the direction in which the crack occurs is the same as the orientation direction of the long fibers 300, Since the strength of the force applied to the blade root 200 is poor, when the propeller fan 101 is rotated, the blade 103 may break at the blade root 200 even at a low rotation speed (for example, 2,500 rpm).

Method used

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  • Propeller fan and manufacturing method thereof
  • Propeller fan and manufacturing method thereof
  • Propeller fan and manufacturing method thereof

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Experimental program
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Effect test

Embodiment

[0056] Figure 1A It is a perspective view of a propeller fan manufactured by the manufacturing method according to the present invention, Figure 1B yes Figure 1A View in direction A of the propeller fan in . The propeller fan 1 is made by mixing glass fibers, carbon fibers, talcum powder, etc. in a predetermined ratio (for example, 10 to 40% by weight) in thermoplastic resins such as acrylic resins or polystyrene resins, and has needle-like shapes or bands. Fiber-reinforced plastic (FRP-Fiber Reinforced Plastic) with long fibers (length 0.2-0.5mm) in the shape of a shape is molded by injection molding when the molding conditions such as injection pressure and mold temperature are at specified values. Here, the long fibers are additives for increasing the strength of the propeller fan 1 and may be oriented substantially parallel to the flow direction of the molten thermoplastic resin during injection molding.

[0057] Such as Figure 1A As shown, the propeller fan 1 incl...

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Abstract

A propeller fan molded by injection molding using a resin material containing a continuous fiber, includes a hub having an end surface wall and a peripheral wall; and a plurality of blades on an outer periphery of the hub, the propeller fan being molded by providing a plurality of injection positions for injecting the resin material containing the continuous fiber in a part of the end surface wall corresponding to a root portion of one of the blades of the hub.

Description

technical field [0001] Embodiments of the present invention relate to a propeller fan manufactured by injection molding of a resin material and a method of manufacturing the same, and more specifically, to a propeller fan with improved durability and a method of manufacturing the same. Background technique [0002] As a propeller fan conventionally installed in outdoor units of air conditioners, air cleaners, ventilators, etc., for conveying fluids such as air, it is known to use a thermoplastic resin such as acrylic resin in a predetermined ratio ( For example, fiber-reinforced plastic (FRP-Fiber Reinforced Plastic) mixed with glass fiber (30% by weight) is a technology that is molded by injection molding under the condition that the molding conditions such as injection pressure and mold temperature are at specified values. [0003] exist Figure 5 In , a general injection molding machine 110 used for injection molding of the above-mentioned propeller fan is shown. This in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/38B29C45/27F04D29/32F04D29/64
CPCF04D29/26B29C45/0005B29C45/0046B29C45/2708B29K2105/12B29L2031/087F04D29/023F04D29/329F04D29/388F04D29/646F05D2300/603F05D2300/44
Inventor 吉田春善
Owner FUJITSU GENERAL LTD