JPS58155295A - Method of producing pump vane for magnet drive pump - Google Patents

Abstract

PURPOSE:To enable a pump vane to produced without using adhesives by forming a primary molding on a pump shaft, then inserting a driven magnet therein and filling resin in a secondary molding. CONSTITUTION:A pump shaft 6 is fixedly inserted in a metal mold which is filled with resin from a primary molding port to form a primary molding 14 around the pump shaft 6 and a bearing 8a. The pump shaft 6 provided with the primary molding 14 and a driven magnet together with another bearing 8b is fixedly inserted in another metal mold which is filled with resin from a secondary molding port to form a resin layer 23 and fix it around the magnet 5 so that a pump vane can be produced without using adhesives and with low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a pump blade for a σ magnet-driven pump.

FIG. 1 is a vertical view showing a conventional magnet-driven pump.
tl O-ring provided in these bonding directions, (4) σ
Pump vanes provided in the box cases (1) and (2) for rotary OT function, (5) is a cylindrical driven magnet provided inside the vanes, (6) a above vane (4) ) The pump shaft is installed in the center of (7) H stiffness) The pump shaft is supported by the rotating shaft in the box case t1), 12), and (8a) and (8b) this bearing and sliding Inquiry about the blade (4) ν and the bearing supporting the pump shaft t61k, and the driven magnet ti) in 19), so that
A cylindrical drive magnet placed outside the plant case (2), tll is a magnet fixing plate that fixes this drive magnet by a press-fit contact layer, and Uυ is a magnet fixing plate that is fixed to the rotating shaft of the electric motor 14σ. It's Natsuto.

A, electric! When the a machine U4 is rotated, the driving magnet 191 is rotated by the rotational force of the electric motor 14, and as the driven magnet (5) rotates, the driven magnet (5) rotates and the blade (4) is rotated, causing water to flow in the direction of the arrow a. Inhale and send water in the direction of the arrow.

The pump blade (4) is equipped with a driven magnet (5) inside, and the entire outside thereof is covered with plastic, so that even if the driven magnet (5) is damaged due to impact, it will not be attached to the N, 86 to 8 poles.
The repulsion force of the worn magnet completely prevents the pump blade from separating outward.The components of the conventional pump blade are divided into four parts: the driven magnet, the pump shaft, the bearing, and the blade, which is made of a resin molded product. They were molded separately and then glued together using an ultrasonic adhesive, but if adhesive was used, the adhesive would flow out onto the bearing surface, causing abnormal noise in the sliding area. , If it adheres to the surface of the pump shaft, it may not fit into the mating part, and assembly quality and productivity may deteriorate.

In addition, since this pump is also used for conveying hot water, the impeller material a is a highly heat-resistant glass-filled Gohan Noryl resin. If there is uneven adhesion during adhesion, repeated rapid temperature changes (e.g. -20 to +80°C) υ), which inevitably lead to continuous high temperatures, often result in the adhesive part peeling off. To prevent this, ultrasonic bonding is used, but depending on the shape of the parts, bonding may not be possible, and in such cases, it is necessary to use adhesive to bond the parts.

Furthermore, the driven magnet σ used in this type of pump
Ferrite-based magnets are used, and there is a difference in thermal expansion coefficient from that of noryl resin, so even if they are integrally molded, they are susceptible to heat shock (e.g. sudden temperature changes from -20 to +80 degrees Celsius) and continuous high temperatures. This has the disadvantage that the outer resin part of the magnet may crack.

In this invention, the above-mentioned conventional Q] (/l (1) A method υ) which was made to eliminate the drawbacks is that after forming a specific primary molded product on the pump shaft, a driven magnet is inserted, Furthermore, by filling the tree H'# with secondary molding, it can be manufactured without using adhesives, and even in the case of heat shock or continuous high temperature, there will be no peeling or cracking, resulting in high quality and high growth quality. The purpose is to provide the following.

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

Fig. 2 shows the side view of the primary molded product υ], Figs. 3 to 5 show the A-input of Fig. 2 at each step, Fig. 6 shows the driven magnet) 1, and (a) U plan view. , (b) r[B
-B sectional view, (c) &1114 side view, Figures 7 and 8
It is a plan view showing another driven magnet θ), and in the figure, the same reference numerals as in FIG. 1 indicate parts corresponding to a.

0, the anti-rotation groove provided in the pumpshaft 7X6), u4
1 [Primary molded product, pump shaft tti7 ci] Cylindrical base 4 that covers the outer periphery, cylindrical magnet guide 4 that is concentric with this base, and a vane plate Q that connects one end of each of these and extends into a disc shape. ? ), the magnet insertion space formed by these, 2I! A plurality of guide rib ends extend radially from the magnet insertion space Qlll leaving the magnet inflow space ttS, and a guide rib (end) extends radially to the magnet insertion space Ql side of the vane plate αυ. It is composed of a plurality of connecting positioning ribs -υ.

@a U-shaped engagement groove formed at one end of the driven magnet (5) inserted in the magnet insertion blank tli, (
C) Driven magnet L5) K so that it surrounds dR
The resin fills the magnet insertion space ttm including the shield inflow space L1, covers the opening s'1 of the magnet insertion space, and also flows into the ua'4 to engage the driven magnet +61k. . Guide rib (smaller than the inner diameter of the AJtl driven magnet (5). Arrow C
The position of the σ primary molding port and the secondary molding port is indicated by arrow d. -4
1H vane plate t17Nc Attached with ultrasonically bonded vane plate.

Manufacturing method r1 consists of a primary molding step, a driven magnet (5) insertion step, a secondary molding step, and a doping step. In the primary molding process, as shown in Figures 2 and 3, the pump shaft +61 with one bearing (8a) attached is placed in a mold (
(not shown) and m from the primary molding opening (arrow C).
BFI' is filled to form the primary molded product I around the pump shaft (6) and bearing (8a).

Pumpsha 7) The primary molded product Ql was formed in this way.
(Take it out from 61'e Kinjo, put it into the Kamiyu mvC#, and use the above driven magnet as the (c) surface t guide of the dot guide μ-). As shown in FIG. 4, the above primary molded product (1412 and the pump shaft (6) equipped with the driven magnet (5) is separate from the other shaft 9 (8b)) (not shown). Insert and fix [7, Secondary formation port (arrow d)]
Sprinkle the meat fat into a light bottle, form a resin (c), and wrap the driven magnet (width) to fix it. Resin layer-4+, r
A tree Bd inflow is formed between a certain space, and the details α2+ f? Fill all the gaps in the magnet insertion space U, and secure the opening part 11, the bearing (8b), and the driven magnet 151 there.

In the next adhesion process, another vane plate is attached to the stile U'D by ultrasonic contact Mt as shown in FIG. 5, and the pump vane (4) is completed.

By the above! Since the pump that was rotated (4) and the primary molded product Ia are connected by the base U, it does not rotate all the way, but the detent FI4u31I4 goes up, and furthermore, the yJJ effect is large. Become. The resin layer (to) and the next molded product I are engaged with each other by the guide rib 4 and the positioning rib υ.
Even though it is cylindrical, it does not rotate fully, but the effect is much greater than the button by providing the driven magnet (5) with a groove-like connecting part with the resin layer (C). ! It becomes.

Even if the bearings (8a) and (8b) have a concave shape, rotation rr can be prevented, but if they are formed into an irregular shape such as a semi-cylindrical shape, the rotation prevention effect a becomes greater.

Since the magnet guide is formed by primary molding, no undue stress or cracks will occur during insertion of the driven magnet (5) and secondary molding. Further, by forming an uneven step at the tip i4M of the magnet guide IIO, it is possible to prevent water from entering and improve the compatibility of the resin no. and Q.

Note that the driven magnet (5) may have a groove (not limited to the U-shaped groove shown in Fig. 6 in the connecting part with the magnet, but may have an uneven shape υ in other shapes and positions). .

For example, as shown in Figure 7, it is provided on the outer periphery! Also V-shaped #
CI! ! 9. Alternatively, a rectangular groove (C) provided on the inner circumferential portion as shown in Fig. 8 may be used, but the one shown in Fig. 6 is easier to process.

Further, the present invention is applicable not only to the manufacture of pump vanes for pumps for other purposes, but also for hot water conveyance pumps.

As described above, according to the present invention, the pump shaft is formed with a specific primary molded product, the driven magnet is inserted, and the resin layer is filled with the secondary molding, so that the following effects can be achieved. is obtained.

■Since it is not necessary to use adhesive to manufacture pump blades, productivity and quality are improved, and pump blades JFK can be manufactured at low cost.

■Since the filled resin layer engages with the ribs provided on the vane and the retaining part of the magnet, there is no full rotation of the magnet due to thermal expansion.

Since the magnet is inserted after the magnet guide is formed by primary forming, there is no cracking on the outer periphery of the magnet.

On the other hand, the parts are integrated, which improves serviceability.

■Long-term 0) Heat shock or σEven in the case of continuous high-temperature use, thermal stability can be measured, so long-term use is possible. ■As molding is performed in stages, there is no molding of thick parts, which prevents sinks. , no cavities or the like occur, and unbalance during rotation can be eliminated.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing a conventional magnet-driven pump, Fig. 2 is a side view of the primary molded product, Figs. 3 to 5 σ
A sectional view taken along the line A-A in FIG. 2 in the valley process, and a driven magnet shown in FIG. FIG. 8 is a plan view showing another example of a driven magnet. In each figure, the same numbers indicate the same parts or the parts corresponding to a, (1)
, (2) double box case, (4) A vane, 151 ri driven magnet, (6) pump shaft, (7), (8
a), (8b) 1, u bearing, (9) ri drive magnet, u4 is electric motor, t14 is primary molded product, uS is base, ae is magnet guide, enclosure, (to) 0 vane plate, Q8
u magnet insertion space, mrx guide rib, tIIυ positioning rib, fourth groove, @α resin layer. Agent Makoto Kuzuno - (1 other person) Figure 3, Ward 2, Figure 5 (0) /22] Figure 7, Figure 6, Figure 8

Claims (1)

[Claims] (1) One of the bearings and the pump shaft are inserted and fixed in the mold, and resin is filled from the primary molding port to form a base that covers the outer part of the pump shaft, and a cylindrical shape concentric with this base. Magnetic guide, disk-shaped blade plate connecting one end of each of these,
and a primary molding step of forming a primary molded product having guide ribs extending from the base in the magnet insertion space formed by these, and inserting a driven magnet into the magnet insertion space as a guide for the entire inner surface of the magnet guide. The pump shaft with the primary molded product and the driven magnet attached is inserted and fixed into another mold together with the other bearing, and the magnet insertion space is filled with resin from the secondary molding port, and the driven magnet is inserted into the mold. A method for manufacturing a pump vane for a magnet-driven pump, the method comprising: a secondary molding step of forming a resin layer surrounding the vane; and an adhesion step of ultrasonically bonding another vane plate to the vane plate. (2) The method for manufacturing a pump blade for a magnet-driven pump according to claim 1, wherein a positioning rib extending from the blade plate to the magnet insertion space is formed in the primary forming step. (3) A method for manufacturing a pump blade for a magnet-driven pump according to claim 1 or 2, characterized in that a retaining portion with the resin layer is formed on the driven magnet. 14) The method for manufacturing a pump vane for a mag-button-driven pump according to claim 3, wherein the retaining portion with the fat layer 11 is a groove. (5) The method for manufacturing a pump blade for a magnet-driven pump according to any one of claims 1 to 4, characterized in that a rotation stopper #1 ft is formed on the outer periphery of the pump shaft.