JPH0220407B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for manufacturing a spiral-wound part, and in particular, the present invention relates to a method and apparatus for manufacturing a spiral-wound part, and in particular, by meshing two spiral-wound bodies with each other out of phase and causing them to move in a relative circular orbit. The present invention relates to a method and apparatus for manufacturing a spiral component of a so-called scroll-type fluid suction/discharge device, which forms a space that moves in one direction between both spiral bodies and conveys fluid through the space.

In a scroll type fluid suction/discharge device, the axial dimension of the spiral body is an important factor in determining the capacity, and generally, the larger the axial dimension, the larger the capacity can be obtained. However, when making this type of spiral-wound part using a casting method, forging method, etc., the larger the axial dimension of the spiral-wound body, the larger the draft taper must be. In order to make the thickness uniform, the number of parts that require shaping such as cutting increases, resulting in the problem that not only is there a lot of wasted material, but processing is also time-consuming.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a manufacturing method and device for a spirally wound component for a scroll-type fluid suction/discharge device, which can reduce the drafting taper of the spirally wound body portion during molding and reduce the number of shaping operations.

A further object of the present invention is to provide a manufacturing method and apparatus that allow mass production of a spirally wound component for a scroll-type fluid suction/drainage device using synthetic resin.

The present invention will be described below using examples with reference to the drawings.

First, to describe the properties of the spiral body of the scroll member of a scroll-type fluid machine, as shown in Fig. 5, the wall surface curve of the spiral body is an involute with P as the starting point of expansion and opening, and ρ = φ・Γg Γg = radius of generating circle φ = expansion and opening angle. (Different from Archimedes' spiral ρ = aφ, which uses the origin as the starting point for expansion and expansion.) Also,
As shown in Figure 6, there is a gap between an involute curve with P ₁ as the starting point of expansion and an involute curve with the starting point of expansion and expansion as P ₂ , which is shifted by a certain angle β on the generating circle. ₁ = φ・Γg ₂ = (φ − β)・Γg ∴d= ₁ − ₂ = β・Γg (constant) β = expansion/opening start angle of the involute curve d = distance between the involute curves The distance d is the length cut by the tangent to the generating circle, and is constant regardless of the extension angle φ. Therefore, a distance d is formed between one involute curve and an involute curve obtained by rotating the involute curve by a certain angle β around the origin O.

That is, when at least one of the mold members of the spiral-wound parts manufacturing apparatus described below is rotated in a certain angle rotation direction, the gap between the wall surfaces of the spiral bodies of both mold members that are arranged opposite to each other changes uniformly.

Next, another feature of the involute curve is that, as shown in Figure 7, the involute curve lies on the half line on the extension side of the tangent to the generating circle, P=
It has periodicity expressed by the relationship 2π·Γg (P=pitch).

FIG. 1 shows an embodiment of a spiral-wound part manufacturing apparatus according to the present invention in an exploded state. This spiral-wound part manufacturing apparatus 1 includes a first mold member 2 that is arranged to be rotatably driven by a rotary drive shaft 24, and a second mold member 3 that has a plurality of drive pins 31 on one end surface.
and a rotary drive plate 4 having a fitting hole 41 formed on one end surface into which the drive pin 31 of the second mold member 3 is fitted;
It consists of a third mold member 5 in which an opening 51 is formed into which the spiral part material is injected.

The first mold member 2 comprises a side plate 21, a first spiral body 22 and an outer wall 23 formed on one side of the side plate 21, and a rotational drive shaft 24 formed on the opposite side, On the outer wall side of the first spiral body 22 on the side plate 21, there is a substantially rectangular through hole 2 whose inner and outer surfaces are arcuate with the center of the spiral body 22 as the center point.
5 is bored at a location corresponding to the drive pin 31 formed on the second spiral body 32 of the second mold member 3. Also, the first spiral body 22 and the second spiral body 3
2, the direction of the spiral is the same, and the flange portion 221 formed on the outer peripheral wall surface of the first spiral body 22 is the same as that of the second spiral.
A recess 3 formed on the inner circumferential wall surface of the spiral body 32.
The drive pin 31 provided on the end surface of the second spiral body 32 is placed on top of the drive pin 31 so as to face the second spiral body 32 with a slight gap therebetween.
It is inserted and penetrated into 5. The end of the drive pin 31 that protrudes through the through hole 25 is fitted into a fitting hole 41 formed on one end surface of the rotary drive plate 4 .
Therefore, the second mold member 3 can move in the rotational direction within the range limited by the through hole 25 of the side plate 21 through which the drive pin 31 passes. The mold surface 52 of the third mold member 5 has a ring-shaped recess 53 . An opening 51 is formed at the bottom of the ring-shaped recess 53 for injecting the spiral component material.
In addition, the gas vent hole 6 is located at the first hole as shown in FIG. 1a.
It is preferable to provide it in the mold member 2 of. The first mold member 2 and the third mold member 5 are finally interconnected by a connecting means (not shown) such as a bolt nut.

Spiral parts manufacturing device 1 assembled in this way
For example, a synthetic resin material or molten aluminum metal is injected into the hole 51 through the opening 51.
The injected synthetic resin material or molten metal is
The inner peripheral wall surface of the spiral body 22 and the second spiral body 32
A spiral gap 7 formed between the outer peripheral wall surface of
The mold surface 26 of the first mold member 2 and the third
A gap 8 formed between the mold surface 52 of the mold member 5 and
It also fills the ring-shaped recess 53 and solidifies.
After solidification, the mutual connection between the first mold member 2 and the third mold member 5 is released, and the third mold member 5 is removed.
When the rotation drive plate 4 is rotationally driven, the second mold member 3
rotates and releases the pressing force in the direction of the spiral gap 7. Then, as shown in FIG. 3, the inner peripheral wall surface of the spiral body 9 of the solidified spiral material A and the second
Since a gap is created between the mold member 3 and the outer circumferential wall surface of the second spiral 32, the solidified material A can be relatively easily removed from the first mold member 2.

In addition, although the manufacturing method in which the rotationally driven plate 4 is rotationally driven to take out the molded material A, it is also possible to take out the molded material A by rotationally driving the first mold member 2, or Of course, the plate 4 and the first mold member 2 may be rotated at the same time to take out the molded material.

Furthermore, in this embodiment, a manufacturing apparatus in which both the first mold member 2 and the second mold member 3 can be rotationally driven has been described, but either the first mold member 2 or the second mold member 3 It may be manufactured by fixing one mold member and rotating the other mold member.

As explained above using the embodiments, according to the present invention, it is possible to reduce the draft taper of the spiral portion during molding, thereby reducing the shaping work of the spiral portion, which is difficult to machine. Not only is waste reduced, but manufacturing time can also be significantly shortened, and an inexpensive spiral-wound component for a scroll-type fluid suction/drainage device can be provided.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an embodiment of a device for manufacturing a spiral component for a scroll-type fluid suction/discharge device according to the present invention, and FIG. 2 is a cross-sectional view of an assembled device for manufacturing a spiral component. Figure 3 is a cross-sectional explanatory view showing the state in which the spirally wound part is taken out, Figure 4 is a perspective view showing an example of the obtained spirally wound part, and Figure 5 is a perspective view showing an example of the spirally wound part obtained.
FIG. 6 is an explanatory diagram of the involute curve, FIG. 6 is an explanatory diagram showing the properties of the involute curve, and FIG. 7 is an explanatory diagram showing the periodicity of the involute curve. 1... Spiral part manufacturing device, 2... First mold member,
3... Second mold member, 4... Rotation drive plate, 5... Third mold member, 22... First spiral body, 25... Through hole,
31... Drive pin, 32... Second spiral body, 41...
Fitting hole, 51...opening.

Claims (1)

[Claims] 1. A spiral gap formed between two first and second mold members which are rotatable in relatively opposite directions and whose spiral bodies have the same direction. The spiral part material is filled into the gap formed between the mold surface of the first mold member and the mold surface of the third mold member and molded, and then the rotary drive plate is rotated to form the spiral part material. A method for manufacturing a spiral-wound part, characterized in that the gap is made larger, thereby facilitating detachment of the part molded in the spiral-shaped gap. 2 A first spiral body is formed on one surface, and on the side surfaces corresponding to the wall surface of the first spiral body, a plurality of circular arcs whose inner and outer walls are concentric circles centered on the center of the spiral body are formed. a first mold member having a through hole formed therein; a second mold member having a driving pin that passes through the through hole at a location opposite to the through hole of the first mold member on one end surface; Rotation in which the driving pin passes through the through hole of the first mold member and forms a fitting hole that fits with a portion protruding from the rear surface of the first mold member, thereby imparting a constant rotational movement to the second mold member. The method includes a driving plate and a third mold member having an opening for injecting the spiral part material, and rotates the mold member within a range limited by the through hole to form a gap between the first and second spiral parts. A manufacturing device for a spiral-wound part, characterized in that it is variable.