JP2014238080A - Resin scroll fluid machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin scroll fluid machine capable of achieving weight reduction of a scroll member and ensuring high efficiency.SOLUTION: A resin scroll fluid machine 1 comprises: a housing 2; a fixed scroll 10 having a spiral fixed-side lap 14 provided upright on one surface of a fixed end plate 12 fixed to the housing 2; and a swing scroll 20 having a swing-side lap 24 provided upright on one surface of a swing end plate 22 supported by the housing so as to be able to revolve, the swing-side lap 24 defining a sealed space 30 with the fixed-side lap 14, the fixed scroll 10 and the swing scroll 20 being formed out of resin. A continuous fiber portion 50 comprised of prepreg 50A obtained by impregnating continuous fibers 52 with resin is formed on at least either the fixed-side lap 14 or the swing-side lap 24.

Description

  The present disclosure relates to a scroll fluid machine, and more particularly, to a resin scroll fluid machine in which both a fixed scroll and a turning scroll are formed of resin.

  A scroll fluid machine exemplified as a scroll compressor is generally supported by a fixed scroll in which a spiral fixed-side wrap is erected on one surface of a fixed end plate fixed to the housing, and supported by the housing in a revolving manner. A orbiting scroll having a spiral orbiting side wrap standing on one surface of the orbiting end plate. In the scroll compressor, the orbiting scroll revolves in a state where the fixed side wrap of the fixed scroll and the orbiting side wrap of the orbiting scroll are meshed with each other, so that the space between the fixed side wrap and the orbiting side wrap is The fluid is compressed in a sealed space (compression chamber) defined in (1). The scroll expander is configured such that the orbiting scroll revolves by the action force of the high-pressure fluid supplied from the center of the scroll and flowing into the sealed space.

  Patent documents 1 and 2 are mentioned as prior art documents concerning such a scroll fluid machine.

JP 2012-21536 A Japanese Patent No. 4969222 Japanese Patent No. 4233823

  By the way, most of the scroll members of the conventional scroll fluid machine are made of a metal material such as aluminum. On the other hand, the present inventors thought that the scroll member can be reduced in weight by forming the scroll member with a resin, and thus the scroll fluid machine as a whole can be reduced in size and weight.

  Patent Document 3 discloses an invention relating to a scroll compressor in which a scroll member is formed of a synthetic resin. However, in the scroll compressor of Patent Document 3, since the strength of the scroll member, particularly the strength of the wrap portion that defines the compression chamber, is insufficient, high volume efficiency cannot be obtained, and the compressor can be highly efficient. There was no problem.

  At least one embodiment of the present invention has been made in view of the conventional problems as described above, and the object is to reduce the weight of the scroll member and to provide a resin with high efficiency. It is to provide a scroll fluid machine.

At least one embodiment of the present invention provides:
A housing;
A fixed scroll in which a spiral fixed side wrap is erected on one surface of a fixed end plate fixed to the housing;
A revolving scroll in which a revolving side wrap that defines a sealed space between the revolving side plate and the fixed side wrap is provided on one surface of a revolving end plate that is supported by the housing so as to be capable of revolving.
A resin scroll fluid machine in which the fixed scroll and the orbiting scroll are formed of resin,
A continuous fiber portion made of a prepreg in which continuous fibers are impregnated with a resin is formed on at least one of the fixed side wrap and the turning side wrap.

  According to the resin scroll fluid machine, since the scroll member is made of resin, the scroll member can be reduced in weight as compared with a scroll fluid machine including a conventional metal scroll member.

And the continuous fiber part which consists of a prepreg which impregnated the continuous fiber with resin is formed in at least any one of the fixed side wrap and the turning side wrap in the scroll member. A prepreg in which continuous fibers are impregnated with a resin exhibits high strength compared to a reinforced fiber resin including normal resin materials and discontinuous fibers as the reinforcing fibers are made of continuous fibers and the resin is cured. Further, a large force acts on the wrap portion from the high-pressure fluid in the sealed space. Therefore, by configuring the wrap portion to include such a continuous fiber portion, the strength of the wrap portion is improved, and it becomes possible to increase the volumetric efficiency of the compressor and introduce a high-pressure fluid into the expander. It is possible to make the fluid machine exhibit high efficiency.

In some embodiments, discontinuous fiber portions made of a resin containing discontinuous fibers are formed in portions other than the continuous fiber portions in the fixed side wrap and the turning side wrap.
According to such embodiment, a scroll member is comprised from a continuous fiber part and a discontinuous fiber part. As described above, the continuous fiber portion has high strength, and the discontinuous fiber portion is inferior in strength to the continuous fiber portion, but can be molded by a method such as injecting a resin containing discontinuous fibers in a mold. Yes, excellent in manufacturability. Therefore, parts that require high strength are composed of continuous fiber parts, and parts that do not require high strength and parts that have complex shapes that are difficult to mold with prepreg are composed of discontinuous fiber parts. It is possible to provide a resin scroll fluid machine that is efficient and has excellent manufacturability.

  In one embodiment, the continuous fiber portion is formed only on the abdominal surface side wrap surface of both the fixed side wrap and the turning side wrap, or both the fixed side wrap and the turning side wrap are formed only on the back side wrap surface. Yes.

According to such an embodiment, the resin scroll fluid machine configured so that the wrap surface formed with the continuous fiber portion and the wrap surface formed with the discontinuous fiber portion are in contact with each other during the revolution turning of the orbiting scroll. Provided.
Also, by forming the continuous fiber part on the wrap surface, positioning when holding the prepreg in the cavity of the mold is easier than when forming the continuous fiber part inside the wrap part instead of the wrap surface. Since it can be performed, it is excellent in manufacturability.

In some embodiments, the resin of the discontinuous fiber portion of the above embodiment is configured to have a larger wear coefficient than the resin included in the prepreg (that is, the resin of the continuous fiber portion).
According to such an embodiment, in the resin scroll fluid machine configured such that the wrap surface formed with the continuous fiber portion and the wrap surface formed with the discontinuous fiber portion are in contact with each other during the revolution turning of the orbiting scroll. The resin on the discontinuous fiber portion side is configured to be more easily worn. As described above, the discontinuous fiber portion is configured to wear preferentially over the continuous fiber portion, so that the continuous fibers of the continuous fiber portion can be prevented from being cut by wear. Since the continuous fiber portion is required to exhibit higher strength than the discontinuous fiber portion, such a configuration is effective in improving the durability of the scroll member.

In other embodiment, the said continuous fiber part is formed in both surfaces of the abdominal surface side wrap surface and the back surface side wrap surface with both the fixed side wrap and the turning side wrap.
According to such embodiment, the resin scroll fluid machine comprised so that the lap surfaces in which the continuous fiber part was formed may contact at the time of revolution revolution of a turning scroll is provided. Thus, by forming the continuous fiber part 50 on both surfaces of the wrap part, the strength of the wrap part can be further increased.

Also, by forming the continuous fiber part on the wrap surface, positioning when holding the prepreg in the cavity of the mold is easier than when forming the continuous fiber part inside the wrap part instead of the wrap surface. Since it can be performed, it is excellent in manufacturability.
Moreover, since both sides of the wrap part are made of the same material by forming the continuous fiber part on both sides of the wrap part, the one side and the other side of the wrap part are made of different materials. In this case, it is possible to suppress warping of the wrap portion that occurs when the resin is cured.

In some embodiments, the continuous fiber portion is configured such that the ratio of continuous fibers in the circumferential direction of the continuous fiber portion is higher than the ratio of continuous fibers in the axial direction.
According to such embodiment, the intensity | strength with respect to the scroll circumferential direction in which especially big force acts in a lap | wrap part can be improved.

In some embodiments, the discontinuous fiber portion is injected with a molten resin containing discontinuous fibers in the cavity portion in a state where the preformed prepreg is held at a predetermined position of the cavity portion in the mold. It is formed by doing.
According to such an embodiment, a resin scroll fluid machine can be manufactured by so-called insert molding using a preformed prepreg as an insert, and a resin scroll fluid machine excellent in manufacturability can be provided. .

  According to at least one embodiment of the present invention, it is possible to reduce the weight of the scroll member and provide a resin scroll fluid machine having high efficiency.

It is a longitudinal cross-sectional view of the scroll compressor in one Embodiment of this invention. It is a top view of the fixed scroll (turning scroll) in one Embodiment of this invention. It is a perspective view of a fixed scroll and a turning scroll in one embodiment of the present invention. In the scroll compressor in one Embodiment of this invention, it is the schematic plan view which showed the shape of the compression chamber when a turning scroll revolved. It is a schematic sectional drawing of the fixed scroll and turning scroll in one Embodiment of this invention, Comprising: It is the figure which showed the cross section in the AA and A'-A 'position in FIG. It is a schematic cross-sectional view of the scroll part in the fixed scroll and turning scroll in one Embodiment of this invention. It is a schematic cross-sectional view of the scroll part in the fixed scroll and turning scroll in one Embodiment of this invention. It is a schematic sectional drawing of the fixed scroll and turning scroll in other embodiment of this invention, Comprising: It is the figure which showed the cross section in the AA and A'-A 'position in FIG. It is a figure for demonstrating the shaping | molding method of the prepreg body in one Embodiment of this invention. It is a figure for demonstrating the shaping | molding method of the scroll member in one Embodiment of this invention. It is a figure for demonstrating the shaping | molding method of the scroll member in one Embodiment of this invention. It is a figure for demonstrating the shaping | molding method of the scroll member in one Embodiment of this invention. It is a figure for demonstrating the shaping | molding method of the scroll member in one Embodiment of this invention. It is a figure for demonstrating the shaping | molding method of the scroll member in one Embodiment of this invention. It is the figure which expanded and showed the 2nd cavity in the scroll outer peripheral end part (b section in a figure) of FIG. 9C. It is the schematic sectional drawing which showed the cross-sectional structure of the prepreg body in one Embodiment of this invention. It is a figure for demonstrating the method of grind | polishing the lapping part in one Embodiment of this invention. It is the figure which expanded and showed the c section in FIG. 9C.

Hereinafter, embodiments of the present invention will be described in more detail based on the drawings.
However, the scope of the present invention is not limited to the following embodiments. The dimensions, materials, shapes, relative arrangements, and the like of the component parts described in the following embodiments are not merely intended to limit the scope of the present invention, but are merely illustrative examples.

FIG. 1 is a longitudinal sectional view showing a scroll compressor according to an embodiment. FIG. 2 is a plan view of a fixed scroll (orbiting scroll) according to an embodiment of the present invention. FIG. 3 is a perspective view of the fixed scroll and the orbiting scroll according to the embodiment of the present invention. FIG. 4 is a schematic plan view showing the shape of the compression chamber when the orbiting scroll revolves in the scroll compressor according to the embodiment.
First, the basic configuration of the scroll compressor 1 according to an embodiment of the present invention will be described with reference to FIGS.

  The scroll compressor 1 includes a housing 2 that forms an outer shell. The housing 2 includes a front housing 4 and a rear housing 6, and both members are configured to be integrally fastened by a fastening member such as a bolt 5. The front housing 4 and the rear housing 6 are integrally formed with flanges 4A and 6A for tightening at a plurality of positions on the circumference, for example, four places at equal intervals. By tightening the flanges 4A and 6A with bolts 5, The front housing 4 and the rear housing 6 are fastened together.

  Inside the front housing 4, the crankshaft 8 is supported by a main bearing 32A and a sub-bearing 32B so as to be rotatable around its axis L. One end side (left side in FIG. 1) of the crankshaft 8 is a small-diameter shaft portion 8A, and the small-diameter shaft portion 8A penetrates the front housing 4 and projects from the one end side. The protruding portion of the small-diameter shaft portion 8A is provided with a clutch, a pulley, and the like (not shown) so that power is transmitted from a driving source such as an engine. An annular mechanical seal 33 (lip seal 33) is installed between the main bearing 32A and the sub-bearing 32B, and hermetically seals the inside of the housing 2 and the atmosphere.

  A large-diameter shaft portion 8B is provided on the other end side (right side in FIG. 1) of the crankshaft 8. The large-diameter shaft portion 8B is integrally provided with a crank pin 8C in a state of being eccentric from the axis L of the crank shaft 8 by a predetermined dimension. The crankshaft 8 is rotatably supported by the small-diameter shaft portion 8A and the large-diameter shaft portion 8B supported by the front housing 4 via the main bearing 32A and the sub-bearing 32B. The crankpin 8C is connected to a turning scroll 20 to be described later via a drive bush 34, a floating bush 36, and a drive bearing 39, and the turning scroll 20 is driven to turn by rotating the crankshaft 8. ing.

  The drive bush 34 is connected to a balance weight 34 </ b> A for removing an unbalanced load generated when the orbiting scroll 20 is orbitally driven. The drive bush 34 is provided with a crank pin hole 34B into which the crank pin 8C is fitted at a position eccentric with respect to the center thereof. As a result, the drive bush 34 and the orbiting scroll 20 fitted to the crankpin 8C are rotated around the crankpin 8C under the compression reaction force of the working gas, and the orbiting radius of the orbiting scroll 20 is variable. The driven crank mechanism is configured.

In the housing 2, a fixed scroll 10 is arranged in addition to the above-described orbiting scroll 20.
As shown in FIGS. 2 and 3, the fixed scroll 10 includes a substantially disc-shaped fixed end plate 12 and a fixed-side wrap 14 that stands vertically on one surface of the fixed end plate 12. The fixed-side wrap 14 is formed in a spiral shape along an involute curve (stretching line) in plan view, and has a thick wall formed thicker than the other scroll sections at the scroll inner peripheral end. A section 14B is formed. Further, a thin section 14A is formed at the scroll outer peripheral end portion of the fixed side wrap 14 in which a concave portion 14c is formed in the belly surface side wrap surface 14a of the scroll outer peripheral end portion. In addition, in order to reduce the outer diameter of the fixed scroll 10, the thickness of the fixed side wrap 14 is originally thin at the scroll outer peripheral end portion of the fixed side wrap 14. The side wrap 14 is formed by further providing a concave portion 14c in a portion where the thickness is originally thin.

  Further, a chip seal 15 a is embedded in the chip surface 15 of the fixed side wrap 14. Further, a discharge port 12 </ b> A for discharging the compressed working gas to the back side of the fixed end plate 12 is formed at a substantially central position of the fixed scroll 10.

  As shown in FIGS. 2 and 3, the orbiting scroll 20 includes a substantially disc-shaped orbiting end plate 22 and an orbiting side wrap 24 that stands vertically on one surface of the orbiting end plate 22. The turning side wrap 24 is obtained by inverting the shape of the fixed side wrap 14 by 180 degrees in the radial direction, and the rest is the above-described fixed side wrap 14 except that the discharge port 12A is not provided. It has almost the same shape.

  The fixed scroll 10 and the orbiting scroll 20 are meshed and assembled with their centers separated by the orbiting radius and the phases of the fixed side wrap 14 and the orbiting side wrap 24 being shifted by 180 degrees. Thereby, the compression chamber 30 which is a sealed space is defined between the fixed side wrap 14 and the turning side wrap 24.

  The working gas introduced from the suction port 42B is introduced into the compression chamber 30 via the suction chamber 42A shown in FIG. Then, as shown in FIG. 4, the orbiting scroll 20 is compressed from (a) to (d) in FIG. 4 by turning (revolving turning) while maintaining a phase shift of 180 degrees without rotating. The volume of the chamber 30 gradually decreases, and the working gas enclosed in the compression chamber 30 is compressed accordingly. The compressed high-pressure gas is configured to be discharged to the outside through the discharge chamber 44 from the discharge port 12A described above.

  A reference numeral 38 in FIG. 1 is a rotation prevention mechanism 38 for preventing the rotation of the orbiting scroll 20. The rotation prevention mechanism 38 of the present embodiment includes a rotation prevention ring 38A and a rotation prevention pin 38B fixed to the front housing 4 and slidably fitted to the inner peripheral surface of the rotation prevention ring 38A. It is configured as a pin ring type rotation prevention mechanism.

  In the scroll compressor 1, both the fixed scroll 10 and the orbiting scroll 20 are made of resin. For this reason, compared with the scroll fluid machine of the same scale provided with the conventional metal scroll member, the scroll member is reduced in weight.

<First Embodiment>
FIG. 5 is a schematic cross-sectional view of the fixed scroll and the orbiting scroll according to the embodiment of the present invention, and shows a cross-section at positions AA and A′-A ′ in FIG. 3.
In the scroll compressor 1 according to at least one embodiment of the present invention, as shown in FIG. 5, at least one of the fixed side wrap 14 and the turning side wrap 24 is impregnated with a continuous fiber 52 with a resin. The continuous fiber part 50 which consists of 50A of prepreg bodies formed by laminating | stacking the above prepreg is formed.

  A prepreg is a molded intermediate product in which a reinforcing fiber is impregnated with a matrix resin, and generally has a sheet shape. As the reinforcing fiber of the prepreg of the present invention, various inorganic fibers and organic fibers such as carbon fiber, aramid fiber, nylon fiber, high-strength polyester fiber, glass fiber, boron fiber, alumina fiber, silicon nitride fiber, or a combination thereof are used. Can be used. Among these, carbon fiber is particularly preferable from the viewpoint of excellent specific strength and specific elasticity.

In addition, as the matrix resin of the present invention, a thermoplastic resin and a thermosetting resin can be used.
Examples of the thermoplastic resin include polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, polyester such as liquid crystal polyester, polyolefin such as polyethylene, polypropylene, polybutylene, polyoxymethylene, polyamide, polyphenylene sulfide, Fluororesin such as polyketone, polyetherketone, polyetheretherketone, polyetherketoneketone, polyethernitrile, polytetrafluoroethylene, crystalline resin such as liquid crystal polymer, styrene resin, polycarbonate, polymethylmethacrylate , Polyvinyl chloride, polyphenylene ether, polyimide, polyamideimide, polyetherimide, polysulfone, polyether Sulfone, amorphous resins such as polyarylate, other phenolic resins, phenoxy resins. Examples of the thermosetting resin include epoxy resins, unsaturated polyester resins, vinyl ester resins, phenol (resole type) resins, urea / melamine resins, and polyimide resins. In addition, you may apply these copolymers, a modified body, and / or resin which blended these 2 or more types.

  In the prepreg of the present invention, the reinforcing fiber is impregnated into the resin as continuous fibers 52. Here, the continuous fiber refers to a form in which reinforcing fibers having a length of 10 mm or more are aligned in a predetermined direction, and a discontinuous fiber 62 described later in which reinforcing fibers having a length of less than 10 mm are oriented in an arbitrary direction. Are distinct.

  The prepreg impregnated with such a continuous fiber 52 with a resin includes a reinforced fiber resin (for example, a discontinuous fiber which will be described later). Higher strength than fiber part 60). Further, a large force is applied to the fixed side wrap 14 and the turning side wrap 24 from the high pressure fluid in the compression chamber 30. Accordingly, by configuring at least one of the fixed side wrap 14 and the turning side wrap 24 so as to include such a continuous fiber portion 50, the strength of the fixed side wrap 14 and the turning side wrap 24 is improved, and the scrolling is performed. The volumetric efficiency of the compressor 1 can be increased. In addition, although such a continuous fiber part 50 is not specifically limited, it is good to be contained in both the wrap parts of the fixed side wrap 14 and the turning side wrap 24.

  In one embodiment, as shown in FIG. 5, discontinuous fiber portions 60 made of resin containing discontinuous fibers 62 are formed in portions other than the continuous fiber portions 50 in the fixed side wrap 14 and the turning side wrap 24. Has been. Here, the discontinuous fiber 62 is a fiber in which reinforcing fibers having a length of less than 10 mm are oriented in an arbitrary direction as described above. Examples of the types of reinforcing fibers in the discontinuous fibers 62 include the same reinforcing fibers as those described above for the prepreg. Moreover, the kind of resin which comprises the discontinuous fiber part 60 is also the same as the matrix resin of the prepreg described above.

  According to such embodiment, the scroll compressor 1 is comprised from the continuous fiber part 50 and the discontinuous fiber part 60. FIG. As described above, the continuous fiber portion 50 has high strength, and the discontinuous fiber portion 60 is inferior in strength to the continuous fiber portion 50. However, as will be described later, for example, long fibers having a fiber length of less than 10 mm are placed in the mold. It can be molded by a method such as injecting a resin containing it, and is excellent in manufacturability. Therefore, in the scroll member, a portion requiring high strength is constituted by the continuous fiber portion 50, and a portion not requiring high strength or a portion having a complicated shape difficult to be molded by the prepreg is the discontinuous fiber portion 60. By comprising, the resin scroll compressor 1 which has high efficiency and is excellent also in manufacturability can be provided.

6A and 6B are schematic cross-sectional views of a scroll portion in the fixed scroll and the orbiting scroll according to the embodiment of the present invention.
In one embodiment, as shown in FIGS. 5, 6 </ b> A, and 6 </ b> B, the continuous fiber portion 50 is formed only on the ventral surface side wrap surfaces 14 a and 24 a together with the stationary side wrap 14 and the turning side wrap 24. Alternatively, both the fixed-side wrap 14 and the turning-side wrap 24 are formed only on the back-side wrap surfaces 14b and 24b. In the embodiment shown in FIG. 6A, the continuous fiber portion 50 is formed only on the abdominal surface side wrap surfaces 14 a and 24 a of the fixed side wrap 14 and the turning side wrap 24. In the embodiment shown in FIG. 6B, the continuous fiber portion 50 is formed only on the back side wrap surfaces 14 b and 24 b of the fixed side wrap 14 and the turning side wrap 24. The thin-walled sections 14A and 24A at the outer peripheral end of the scroll described above are provided by forming the concave portions 14c in the discontinuous fiber portions 60 formed in the stomach side wraps 14a and 24a, for example, as shown in FIG. 6B. It is done.

According to such an embodiment, the wrap surface (the abdominal surface side wrap surfaces 14a and 24a in FIG. 6A and the back surface wrap surfaces 24b and 24b in FIG. 6B) on which the continuous fiber portion 50 is formed when the orbiting scroll 20 rotates orbits. The resin scroll compressor 1 configured to come into contact with the wrap surfaces on which the discontinuous fiber portions 60 are formed (the back side wrap surfaces 14b and 24b in FIG. 6A and the abdominal side wrap surfaces 14a and 24a in FIG. 6B). Provided.
Further, by forming the continuous fiber portion 50 on the wrap surface, the prepreg body 50A is placed inside the cavity of the mold as will be described later, as compared to the case where the continuous fiber portion 50 is formed inside the wrap portion instead of the wrap surface. Since the positioning at the time of holding can be performed easily, it is excellent in productivity.

In some embodiments, the resin of the discontinuous fiber portion 60 is configured to have a larger wear coefficient than the resin included in the prepreg (that is, the resin of the continuous fiber portion 50).
Here, the wear coefficient is an index representing the ease of wear and is defined as the wear amount when the resin is worn under a predetermined condition. Therefore, the larger the wear coefficient, the easier the resin material is worn. The resin having a large wear coefficient includes not only the case where the wear coefficient of the resin itself is large but also the case where the wear coefficient is increased by mixing a filler into the resin.

  According to such an embodiment, the wrap surface (the abdominal surface side wrap surfaces 14a and 24a in FIG. 6A and the back surface wrap surfaces 24b and 24b in FIG. 6B) on which the continuous fiber portion 50 is formed when the orbiting scroll 20 rotates orbits. In the resin scroll compressor 1 configured to come into contact with the wrap surfaces on which the discontinuous fiber portions 60 are formed (the back side wrap surfaces 14b and 24b in FIG. 6A and the ventral side wrap surfaces 14a and 24a in FIG. 6B). The resin on the discontinuous fiber portion 60 side is configured to be more easily worn. As described above, the discontinuous fiber portion 60 is configured to wear preferentially over the continuous fiber portion 50, so that the continuous fiber 52 of the continuous fiber portion 50 can be prevented from being cut due to wear. Since the continuous fiber portion 50 is required to exhibit higher strength than the discontinuous fiber portion 60, such a configuration is effective in improving the durability of the scroll member.

In some embodiments, the discontinuous fiber portion 60 may be configured to have a smaller coefficient of friction than the continuous fiber portion 50.
Here, the friction coefficient is an index representing the degree of friction of the contact surface that comes into contact with another object, and means that the smaller the friction coefficient, the easier it is to slip. Examples of a method for reducing (increasing) the friction coefficient include a method for adjusting the surface roughness in addition to a method for selecting a resin having a small (large) friction coefficient.

  According to such an embodiment, the wrap surface (the abdominal surface side wrap surfaces 14a and 24a in FIG. 6) formed with the continuous fiber portion 50 and the wrap surface formed with the discontinuous fiber portion 60 when the orbiting scroll 20 revolves. In the resin scroll compressor 1 configured so as to be in contact with the back side wrap surfaces 14b and 24b in FIG. 6, the slidability between the discontinuous fiber portion 60 and the continuous fiber portion 50 is increased and continuous. The amount of wear in the fiber part 50 can be reduced.

FIG. 7 is a schematic cross-sectional view of a fixed scroll and a turning scroll according to another embodiment of the present invention, and shows a cross-section at positions AA and A′-A ′ in FIG. 3.
In another embodiment, as shown in FIG. 7, the continuous fiber portion 50 is formed on both the abdominal surface side wrap surfaces 14 a and 24 a and the back surface side wrap surfaces 14 b and 24 b together with the fixed side wrap 14 and the turning side wrap 24. Has been. A discontinuous fiber portion 60 is formed between the continuous fiber portions 50 formed on both wrap surfaces, that is, inside the wrap portion.

  According to such embodiment, the resin scroll compressor 1 comprised so that the lap surfaces in which the continuous fiber part 50 was formed contacted at the time of revolution revolution of the turning scroll 20 is provided. Thus, by forming the continuous fiber part 50 on both surfaces of the wrap part, the strength of the wrap part can be further increased.

Further, by forming the continuous fiber portion 50 on the wrap surface, as will be described later, the prepreg body 50A is formed in the cavity of the mold as compared with the case where the continuous fiber portion 50 is formed not inside the wrap surface but inside the wrap portion. Since it can be easily positioned when held in the (cavity), it is excellent in manufacturability.
In addition, since the continuous fiber portion 50 is formed on both surfaces of the wrap portion, both surfaces of the wrap portion are composed of the same material, so that one surface side and the other surface side of the wrap portion are composed of different materials. When the resin is cured, it is possible to suppress warping of the wrap portion that occurs during resin curing.

  Moreover, in one Embodiment of this invention, the bending part 56 is formed in the base end part of the continuous fiber part 50, as shown in FIG.5 and FIG.7. The bent portion 56 is bent in a direction away from the wrap surface. The fixed end plate 12 (the swivel end plate 22) and the fixed side wrap 14 (the swivel side wrap 24) are integrated in a state where the bent portion 56 is embedded in the fixed end plate 12 (the swivel end plate 22). Yes. With such a configuration, it is possible to provide a higher structural strength against the force acting on the fixed side wrap 14 (the turning side wrap 24) than in the case where the bent portion 56 is not formed.

FIG. 8 is a view for explaining a method for forming a prepreg body in one embodiment of the present invention.
The prepreg body is formed by laminating at least one sheet, generally a plurality of sheet-shaped prepregs, for example, by press molding or the like. The prepreg body 50A shown in FIG. 8A is formed by laminating two types of prepregs 50a and 50b in which the orientation directions of the continuous fibers 52 are different. The continuous fibers 52a of the prepreg 50a are oriented in the X direction in the figure. This X direction corresponds to the scroll circumferential direction when the prepreg body 50A constitutes the continuous fiber portion 50 of the scroll member. On the other hand, the continuous fibers 52b of the prepreg 50b are oriented in the Y direction in the figure. This Y direction corresponds to the scroll axis direction when the prepreg body 50A constitutes the continuous fiber portion 50 of the scroll member.

  In some embodiments, as shown in FIG. 8A, the prepreg body 50A constituting the continuous fiber portion 50 has a ratio of continuous fibers 52a in the X direction (scroll circumferential direction) in the Y direction ( It is configured to be higher than the ratio of the continuous fibers 52b in the scroll axis direction). That is, in the prepreg body 50A illustrated in FIG. 8A, five prepregs 52a and four prepregs 52b are laminated, and the continuous fiber content per one of the prepregs 52a and 52b is equal. Then, the ratio of the continuous fibers 52a in the X direction is higher than the ratio of the continuous fibers 52b in the Y direction.

  In addition, although Fig.8 (a) demonstrated as an example the case where the prepreg body 50A was formed from the prepreg 50a, 50b by which the continuous fiber was aligned in one direction, this invention is not limited to this. For example, as shown in FIG. 8B, a single layer of a prepreg 50c woven in two directions in which the ratio of continuous fibers 52a in the X direction is higher than the ratio of continuous fibers 52b in the Y direction. Or you may form 50A of prepreg bodies by laminating | stacking this two or more. Further, the orientation direction of the continuous fibers is not necessarily limited to the X direction and / or the Y direction. For example, as shown in FIG. 8C, the continuous fibers 52c are inclined by a predetermined angle with respect to the X direction. The prepreg body 50A may be formed by laminating a single layer of the prepreg 50d that is oriented in the above or a plurality of such layers. In this case, the ratio of the X direction component of the continuous fiber 52c is configured to be higher than the ratio of the Y direction component. Further, the prepreg body 50A may be formed by combining the prepregs 50a, 50b, 50c, and 50d described above.

In short, in the present embodiment, the ratio of the X direction component of the continuous fiber is the ratio of the Y direction component of the continuous fiber as a whole of the prepreg body 50A, regardless of the direction in which the prepreg is oriented. What is necessary is just to be comprised so that it may become higher.
According to such an embodiment, when the continuous fiber portion 50 made of the prepreg body 50A is formed on the wrap portion of the scroll member, it is possible to improve the strength in the scroll circumferential direction in which a particularly large force acts on the wrap portion. .

Next, a method for forming the scroll member in one embodiment of the present invention will be described. 9A to 9E are views for explaining a method for forming a scroll member according to an embodiment of the present invention.
In the method of forming the scroll member according to the present embodiment, first, as shown in FIG. 9A, the prepreg body 50A formed by the above-described method is cut into a predetermined shape, and then cut as shown in FIG. 9B. The prepreg body 50A is preformed (pre-formed) into a spiral shape with a roller or the like.

Next, as shown in FIG. 9C, the prepreg body 50A preformed in a spiral shape is disposed at a predetermined position of the cavity 70 defined in the mold (movable mold 72 and fixed mold 74). The hollow portion 70 at this time is in an atmosphere having a temperature lower than the melting point of the resin contained in the prepreg body 50A, and the prepreg body 50A is not deformed by melting the contained resin. The cavity portion 70 includes a first cavity 70a corresponding to an end plate portion of the scroll member (the fixed end plate 12 of the fixed scroll 10 and the turning end plate 22 of the orbiting scroll 20) and a wrap portion of the scroll member (fixing of the fixed scroll 10). It is divided into a second cavity 70 b corresponding to the side wrap 14 and the orbiting side wrap 24) of the orbiting scroll 20. In the embodiment shown in FIG. 9C, the preformed prepreg body 50A is held in the cavity portion 70 along the outer peripheral wall surface 71a of the second cavity 70b corresponding to the lap portion.
9C is a longitudinal sectional view of the movable mold 72 and the stationary mold 74, and the left figure is a plan sectional view of the stationary mold 74 viewed from the BB direction.

  Next, as shown in FIG. 9D, the movable mold 72 is moved toward the fixed mold 74 to close the fixed mold 74. Then, with the cavity 70 sealed, the molten resin 60A is injected from the movable mold 72 side toward the cavity 70 via the sprue 72a. The molten resin 60A to be injected contains the above-described long fibers having a fiber length of less than 10 mm. The long fibers contained in the injected molten resin 60 </ b> A are oriented in an arbitrary direction in the hollow portion 70 and constitute discontinuous fibers 62 in the discontinuous fiber portion 60.

  Finally, as shown in FIG. 9E, after the molten resin 60A is cured, the movable mold 72 is separated from the fixed mold 74, and the completed scroll members (the fixed scroll 10 and the orbiting scroll 20) are taken out. When the molten resin 60A to be injected is a thermoplastic resin, the molten resin 60A is cured by cooling the cavity 70. When the molten resin to be injected is a thermosetting resin, the molten resin may be cured by heating the cavity 70. The cured molten resin 60A constitutes the discontinuous fiber portion 60 of the scroll member. The cured prepreg body 50A constitutes the continuous fiber portion 50 of the scroll member.

  As described above, in some embodiments of the present invention, the discontinuous fiber portion 60 has the cavity portion with the preformed prepreg body 50A held at a predetermined position of the cavity portion 70 in the molds 72 and 74. It is formed by injecting a molten resin 60A containing discontinuous fibers 62 into 70. According to such an embodiment, the resin scroll compressor 1 can be manufactured by so-called insert molding using the preformed prepreg body 50A as an insert, and the resin scroll compressor 1 having excellent manufacturability is provided. can do.

  Further, as described above, by holding the prepreg body 50A along the outer peripheral wall surface 71a of the second cavity 70b, the scroll member (the fixed scroll 10 and the fixed scroll 10 and the continuous scroll portion 50) is formed on the back side wrap surfaces 14b and 24b. An orbiting scroll 20) can be formed. According to such an embodiment, the prepreg body 50A can be positioned more easily than when the prepreg body 50A is held between the outer peripheral wall surface 71a and the inner peripheral wall surface 71b of the second cavity 70b.

  At this time, the prepreg body 50A is preformed so that the spiral diameter in the natural state is larger than the spiral outer peripheral wall surface 71a defining the second cavity 70b in the fixed mold 74. Then, the preformed prepreg body 50A is configured to be held in the cavity portion 70 in a reduced diameter state, so that the cavity portion 70A can be stably maintained without using a positioning jig or the like. It is possible to hold it.

  Contrary to the above embodiment, the prepreg body 50A is held along the inner peripheral wall surface 71b of the second cavity 70b, so that the scroll member (with the continuous fiber portion 50 formed on the abdominal surface side wrap surfaces 14a, 24a) ( The fixed scroll 10 and the orbiting scroll 20) can be formed. In such an embodiment, as in the case described above, the positioning of the prepreg body 50A is easier than in the case where the prepreg body 50A is held between the outer peripheral wall surface 71a and the inner peripheral wall surface 71b of the second cavity 70b. Can be done.

  At this time, the prepreg body 50A is preformed so that the spiral diameter in the natural state is smaller than the spiral inner peripheral wall surface 71b defining the second cavity 70b in the fixed mold 74. Then, the preformed prepreg body 50A is configured to be held in the cavity portion 70 in an expanded state, so that the prepreg body 50A can be stably maintained without using a positioning jig or the like. It is possible to hold it.

<Second Embodiment>
Further, in the scroll compressor 1 according to at least one embodiment of the present invention, as shown in FIGS. 2 and 3 described above, at least one scroll outer wrap end portion of the fixed side wrap 14 and the turning side wrap 24, Thin-walled sections 14A and 24A having recesses 14c are formed in the belly surface side wrap surfaces 14a and 24a at the scroll outer peripheral ends. In the embodiment shown in FIG. 3, thin sections 14 </ b> A and 24 </ b> A are formed at the scroll outer peripheral ends of both the fixed side wrap 14 and the turning side wrap 24, respectively.

  The rigidity of the scroll member is lowest at the scroll outer peripheral end portion in the wrap portion, and this is an obstacle to increase the efficiency of the scroll compressor. This is because the outer peripheral edge of the scroll has a two-sided fixed structure whose end edge is a free end and has lower rigidity than other scroll sections having a three-sided fixed structure. This is because the thickness of the wrap portion is often made thin in order to reduce the diameter.

  Therefore, by forming such thin sections 14A and 24A at the scroll outer peripheral ends of the fixed side wrap 14 and the turning side wrap 24 as in the above embodiment, the abdominal surface side wrap surface 14a of the thin sections 14A and 24A is formed. , 24a and the back side wrap surfaces 24b, 14b of the mating scroll member are not in contact with each other, so that the compression chamber 30 can be prevented from being formed at the outer peripheral end of the scroll. The compression chamber 30 is formed from a lap portion (point a in FIG. 2) that is located on the inner peripheral side of the thin sections 14A and 24A and has a predetermined rigidity. For this reason, the compression chamber 30 can be reliably formed without deformation of the wrap portion, and thereby the efficiency of the scroll compressor 1 can be increased.

In some embodiments, as shown in FIG. 6B described above, in the thin sections 14A and 14B, the continuous fiber portion 50 including the prepreg body 50A in which the continuous fiber 52 is impregnated with resin is formed.
As described above, the prepreg body 50A in which the continuous fiber 52 is impregnated with a resin is composed of the continuous fiber 52, and the resin is cured to reinforce the fiber resin including the normal resin material and the discontinuous fiber 62 (for example, High strength compared to the discontinuous fiber part 60). Therefore, according to such an embodiment, since the continuous fiber portion 50 is formed in the thin sections 14A and 24A, the strength of the wrap portions of the thin sections 14A and 24A formed thin can be improved. .

Further, in some embodiments, as shown in FIG. 6B described above, the continuous fiber portion 50 is formed on the back side in the scroll section other than the thin section from the back side wrap surfaces 14b and 24b of the thin section 14A and 24A. It extends to the wrap surfaces 14b and 24b. In the embodiment shown in FIG. 6B, the continuous fiber portion 50 is formed over the entire scroll circumference of the back side wrap surfaces 14 b and 24 b in the fixed side wrap 14 and the turning side wrap 24.
According to such embodiment, since the continuous fiber part 50 is extended also in other scroll sections other than a thin section, the intensity | strength of the lap | wrap part in another scroll section can also be improved. The continuous fiber portion 50 is configured to extend to the back side wrap surfaces 14b and 14b instead of the abdominal side wrap surfaces 14a and 14b in which the recesses 14c and 24c are formed, so that the resin scroll compression excellent in manufacturability is achieved. Machine 1 can be provided.

  In some embodiments, as shown in FIG. 5 and FIG. 7 described above, the portions other than the continuous fiber portion 50 in the fixed side wrap 14 and the turning side wrap 24 are made of resin containing discontinuous fibers 62. A discontinuous fiber portion 60 is formed.

  In some embodiments, as described in FIG. 8 described above, the continuous fiber portion 50 is configured such that the ratio of the continuous fibers 52 in the circumferential direction of the continuous fiber portion 50 is higher than the ratio of the continuous fibers 52 in the axial direction. It is configured.

  In some embodiments, as described in FIGS. 9A to 9E described above, the discontinuous fiber portion 60 is a state in which the preformed prepreg body 50A is held at a predetermined position of the cavity portion 70 in the mold. Thus, it is formed by injecting molten resin 60 </ b> A containing discontinuous fibers 62 into cavity 70.

FIG. 10 is an enlarged view of the second cavity at the scroll outer peripheral end portion (b portion in the drawing) of FIG. 9C.
In some embodiments, as shown in FIG. 10, in the fixed mold 74, the scroll outer peripheral end portion of the spiral inner peripheral wall surface 71 b defining the second cavity 70 b is formed in the concave portions of the thin sections 14 </ b> A and 24 </ b> A. Convex portions 74c corresponding to the shapes of 14c and 24c are provided.

  According to such an embodiment, since the concave portions 14c and 24c at the scroll outer peripheral end portion described above can be formed by the convex portions 74c provided on the inner peripheral wall surface 71b of the fixed mold 74, the productivity is excellent. Yes.

<Third Embodiment>
Moreover, in the scroll compressor 1 in at least one embodiment of the present invention, as shown in FIGS. 2 and 3 described above, at least one of the fixed side wrap 14 and the turning side wrap 24 at the scroll inner peripheral end portion. Are formed with thick sections 14B and 24B that are thicker than the other scroll sections. In the embodiment shown in FIGS. 2 and 3, such thick sections 14 </ b> B and 24 </ b> B are formed at the inner peripheral ends of both the fixed side wrap 14 and the turning side wrap 24. Further, as shown in FIGS. 6A and 6B described above, in the thick sections 14B and 24B, the continuous fiber portion 50 including the prepreg body 50A in which the continuous fiber 52 is impregnated with resin is formed.

  As described above, the prepreg body 50A in which the continuous fiber 52 is impregnated with a resin is composed of the continuous fiber 52, and the resin is cured to reinforce the fiber resin including the normal resin material and the discontinuous fiber 62 (for example, High strength compared to the discontinuous fiber part 60). Further, in the scroll compressor 1, the fluid at the inner peripheral end of the scroll has the highest pressure, so that the force acting on the wrap portion (fixed side wrap 14 and turning side wrap 24) from the high pressure fluid is greatest at the inner peripheral end of the scroll. Become. In addition, since the fluid at the inner peripheral end of the scroll has the highest temperature, the strength of the inner peripheral end of the scroll is lowered particularly in the case of a thermoplastic resin. Therefore, it is possible to increase the volume efficiency of the scroll compressor 1 by configuring the scroll inner peripheral end in this manner and improving the strength of the wrap portion at the scroll inner peripheral end.

In some embodiments, as shown in FIG. 6A, the continuous fiber portion 50 extends to other scroll sections other than the thick section 14B, 24B, and the continuous fiber section of the thick section 14B, 24B. 50 is formed thicker than the continuous fiber part 50 of another scroll area. In the embodiment shown in FIG. 6A, the continuous fiber portion 50 is formed over the entire circumference of the scroll on the abdominal surface side wrap surfaces 14 a and 24 a of the fixed side wrap 14 and the turning side wrap 24. Moreover, the thickness of the discontinuous fiber part 60 in the thick sections 14B and 24B is formed substantially the same.
According to such an embodiment, since the continuous fiber part 50 extends also in other scroll sections, the strength of the wrap part other than the thick section can be improved. Moreover, since the continuous fiber part 50 of the thick sections 14B and 24B is formed thicker than the continuous fiber sections 50 of the other scroll sections, the strength of the wrap portion in the thick sections 14B and 24B can be further improved. It becomes.

FIG. 11 is a schematic cross-sectional view showing a cross-sectional configuration of a prepreg body in one embodiment of the present invention.
In some embodiments, as shown in FIG. 11, the thickness of the prepreg body 50A constituting the continuous fiber portion 50 is changed by stacking a plurality of prepregs 50e having different lengths in the X direction. The inclined portion 55 is formed. In the embodiment shown in FIG. 11, the inclined portion 55 is given a uniform inclination, and the thickness of the prepreg body 50 </ b> A gradually changes in the inclined portion 55. The X direction corresponds to the scroll circumferential direction when the prepreg body 50A constitutes the continuous fiber portion 50 of the scroll member.
According to such embodiment, the continuous fiber part 50 from which thickness changes can be formed easily.

In some embodiments, as shown in FIG. 11, at least the surface of the inclined portion 55 is covered with a resin sheet 53.
The plurality of laminated prepregs 50e are, for example, integrated by press molding and then preformed into a predetermined shape. Therefore, according to such an embodiment, by forming the inclined portion 55 whose thickness changes with the resin sheet 53, the laminated prepreg 50e can be stably preformed without losing its shape. it can. In addition, the resin sheet of this invention shape | molds the resin material in the sheet form, Comprising: Unlike the prepreg mentioned above, the reinforcing fiber is not included.

  In addition, the resin sheet 53 that covers the surface of the laminated prepreg 50e also serves as a cutting allowance when performing a polishing process described later, and has an effect of preventing continuous fibers from being cut by the polishing process. The resin sheet 53 in this case is desirably laminated not only on the surface of the inclined portion 55 but also on the entire surface of the laminated prepreg 50e, as shown in FIG.

  In some embodiments, as shown in FIG. 5 and FIG. 7 described above, the portions other than the continuous fiber portion 50 in the fixed side wrap 14 and the turning side wrap 24 are made of resin containing discontinuous fibers 62. A discontinuous fiber portion 60 is formed.

  In some embodiments, as described in FIG. 8 described above, the continuous fiber portion 50 is configured such that the ratio of the continuous fibers 52 in the circumferential direction of the continuous fiber portion 50 is higher than the ratio of the continuous fibers 52 in the axial direction. It is configured.

  In some embodiments, as described in FIGS. 9A to 9E described above, the discontinuous fiber portion 60 is a state in which the preformed prepreg body 50A is held at a predetermined position of the cavity portion 70 in the mold. Thus, it is formed by injecting molten resin 60 </ b> A containing discontinuous fibers 62 into cavity 70.

In some embodiments, at least one of the fixed side wrap 14 and the turning side wrap 24 is formed by polishing the lap surfaces of the fixed side wrap 14 and the turning side wrap 24 after the discontinuous fiber portion 60 is formed. Is formed.
According to such an embodiment, the lap portion is formed by polishing the injection-molded discontinuous fiber portion 60. For this reason, the formation precision of the discontinuous fiber part 60 in injection molding can be made rough, and the manufacturing cost of a metal mold | die can be held down.

FIG. 12 is a diagram for explaining a method of polishing a lapping portion in one embodiment of the present invention.
In some embodiments, as illustrated in FIG. 12, the polishing process described above may be performed on at least one of the fixed side wrap 14 and the turning side wrap 24, and the lap surfaces of the fixed side wrap 14 and the turning side wrap 24. This is performed by relatively rotating the master scroll 80 having a spiral grindstone surface 84a, 84b formed corresponding to the finished shape in a slidably engaged state.

  That is, the grindstone surface 84 a oriented on the outer peripheral side of the master scroll 80 is formed in a spiral shape corresponding to the finished shape of the belly surface side lap surfaces 14 a and 24 a of the scroll member, and on the inner peripheral side of the master scroll 80. The oriented grindstone surface 84b is formed in a spiral shape corresponding to the finished shape of the back side wrap surfaces 14b, 24b of the scroll member. Then, for example, by turning the scroll member relative to each other, the scroll member's lap surface is slid along the grindstone surfaces 84a and 84b of the master scroll 80, thereby causing the scroll member's lap surface to move. Polish until desired shape.

  According to such an embodiment, since at least one of the fixed-side wrap 14 and the turning-side wrap 24 and the master scroll 80 are turned relatively, the wrap surface can be polished, so that the productivity is improved. Is excellent.

<Fourth embodiment>
In the first to third embodiments described above, the resin scroll compressor 1 has been described as an example as an embodiment of the resin scroll fluid machine.
However, in the fourth embodiment described below, the fixed scroll 10 (orbiting scroll 20) will be described as an example, but the subject of the invention is not limited to the resin scroll fluid machine and its components. . The invention according to the fourth embodiment can be applied to all resin structures including a substrate formed of a resin and a wall provided upright from one surface of the substrate.

That is, the fixed scroll 10 (orbiting scroll 20), which is an embodiment of the resin structure of the fourth embodiment, has a fixed end plate 12 (see FIG. 2 and FIG. 3) formed of resin. The rotating end plate 22) and the fixed side wrap 14 (the rotating side wrap 24) erected from one surface of the fixed end plate 12 (the rotating end plate 22), and the fixed side wrap 14 (the rotating side wrap 24). As shown in FIG. 5 and FIG. 7 described above, a continuous fiber portion 50 is formed which is formed of a prepreg body 50A in which the continuous fibers 52 are impregnated with a resin.
A bent portion 56 is formed in the continuous fiber portion 50, and the fixed end plate 12 (the swivel end plate 22) is embedded in the fixed end plate 12 (the swivel end plate 22) described above. And the fixed side wrap 14 (the turning side wrap 24) are integrated.

  In the above embodiment, the fixed scroll 10 (the orbiting scroll 20) is the resin structure of the present invention, the fixed end plate 12 (the orbiting end plate 22) is the substrate of the resin structure of the present invention, and the fixed side wrap 14 (the orbiting side). The wraps 24) correspond to the walls of the resin structure of the present invention.

  As described above, the prepreg body 50A in which the continuous fiber 52 is impregnated with a resin is composed of the continuous fiber 52, and the resin is cured to reinforce the fiber resin including the normal resin material and the discontinuous fiber 62 (for example, High strength compared to the discontinuous fiber part 60). Further, when a force is applied from the outside to the fixed side wrap 14 (the turning side wrap 24) standing from the fixed end plate 12 (the turning end plate 22), the largest stress is generated at the base end portion. Therefore, in the fixed scroll 10 (orbiting scroll 20) configured as described above, the bent portion 56 is formed in the continuous fiber portion 50, and the bent portion 56 is embedded in the fixed end plate 12 (orbiting end plate 22). Since the fixed end plate 12 (the turning end plate 22) and the fixed side wrap 14 (the turning side wrap 24) are integrated in the state, the strength at the base end portion of the fixed side wrap 14 (the turning side wrap 24) is increased. It is improved and has high durability against the force acting on the fixed side wrap 14 (the turning side wrap 24).

  In some embodiments, as shown in FIG. 5 and FIG. 7 described above, discontinuous fibers are provided in portions other than the fixed end plate 12 (the turning end plate 22) and the fixed side wrap 14 (the turning side wrap 24). A discontinuous fiber portion 60 made of a resin containing 62 is formed.

  In some embodiments, as described in FIGS. 9A to 9E described above, the discontinuous fiber portion 60 is a state in which the preformed prepreg body 50A is held at a predetermined position of the cavity portion 70 in the mold. Thus, it is formed by injecting molten resin 60 </ b> A containing discontinuous fibers 62 into cavity 70.

FIG. 13 is an enlarged view of a portion c in FIG. 9C.
In some embodiments, as shown in FIG. 13, the prepreg body 50A is inserted into the second cavity 70b of the cavity 70 in the mold with the bent portion 56 preformed. The one surface 56 a of the bent portion 56 is held by the cavity portion 70 in a state where it abuts on a part of the wall surface 71 c that defines the cavity portion 70. At this time, the cavity portion 70 is in a temperature atmosphere lower than the melting point of the resin contained in the prepreg body 50A, and the prepreg body 50A is not deformed by melting the contained resin.

  According to such an embodiment, when the prepreg body 50A is held in the cavity portion 70, the preformed bent portion 56 is used for positioning, so that a prepreg can be used without using a positioning jig or the like separately. The body 50A can be held in the cavity 70 in a stable state. For this reason, it is excellent in manufacturability.

In some embodiments, as shown in FIG. 13, the molten resin is configured to be injected into the cavity 70 from the other surface 56 b side of the bent portion 56.
According to such an embodiment, since the molten resin is injected along the direction from the other surface 56b side to the one surface 56a side of the bent portion 56, the prepreg body 50A positioned on the one surface 56a of the bent portion 56 is It is held in the cavity 70 in a stable state without being moved or deformed by the injected molten resin. Therefore, the finished fixed scroll 10 (orbiting scroll 20) has high dimensional accuracy and a low defective product rate.

  As mentioned above, although the preferable form of this invention was demonstrated, this invention is not limited to said form. For example, the above-described embodiments may be combined, and various modifications can be made without departing from the object of the present invention.

  At least one embodiment of the present invention can be suitably used as a resin scroll fluid machine in which a fixed scroll and a turning scroll are both made of resin.

DESCRIPTION OF SYMBOLS 1 Scroll compressor 2 Housing 4 Front housing 4A Flange 5 Bolt 6 Rear housing 8 Crankshaft 8A Small diameter shaft part 8B Large diameter shaft part 8C Crankpin 10 Fixed scroll 12 Fixed end plate 12A Discharge port 14 Fixed side wrap 14A Thin wall section 14a Abdominal surface Side wrap surface 14B Thick section 14b Back side wrap surface 14c Recess 15 Tip surface 15a Tip seal 20 Orbiting scroll 22 Turning end plate 24 Turning side wrap 24A Thin section 24a Abdominal side wrap surface 24B Thick section 24b Back side wrap surface 25 Tip Surface 25a Tip seal 30 Compression chamber 32A Main bearing 32B Sub bearing 33 Mechanical seal (lip seal)
34 Drive bush 34A Balance weight 34B Crank pin hole 36 Floating bush 38 Rotation prevention mechanism 38A Rotation prevention ring 38B Rotation prevention pin 39 Drive bearing 42A Suction chamber 42B Suction port 44 Discharge chamber 50 Continuous fiber part 50a-e Prepreg 50A Prepreg body 52 Continuous Fiber 53 Resin sheet 55 Inclined portion 56 Bent portion 56a One surface 56b Other surface 60 Discontinuous fiber portion 60A Molten resin 62 Discontinuous fiber 70 Hollow portion 70a First cavity 70b Second cavity 71a Outer peripheral wall surface 71b Inner peripheral wall surface 71c Wall surface 72 Movable gold Mold 72a Sprue 74 Fixed mold 74c Convex 80 Master scroll 84a, b Grinding wheel surface

Claims (7)

A housing;
A fixed scroll in which a spiral fixed side wrap is erected on one surface of a fixed end plate fixed to the housing;
A revolving scroll in which a revolving side wrap that defines a sealed space between the revolving side plate and the fixed side wrap is provided on one surface of a revolving end plate that is supported by the housing so as to be capable of revolving.
A resin scroll fluid machine in which the fixed scroll and the orbiting scroll are formed of resin,
A resin scroll fluid machine, wherein a continuous fiber portion made of a prepreg in which continuous fibers are impregnated with a resin is formed on at least one of the fixed side wrap and the turning side wrap.   2. The resin according to claim 1, wherein a discontinuous fiber portion made of a resin containing discontinuous fibers is formed in a portion other than the continuous fiber portion in the fixed side wrap and the turning side wrap. Scroll fluid machine   The continuous fiber portion is formed only on the abdominal surface side wrap surface of the fixed side wrap and the turning side wrap, or is formed only on the back side wrap surface of the fixed side wrap and the turning side wrap. The resin scroll fluid machine according to claim 2.   The resin scroll fluid machine according to claim 3, wherein the resin of the discontinuous fiber portion has a larger wear coefficient than the resin included in the prepreg.   3. The resin scroll fluid machine according to claim 2, wherein the continuous fiber portion is formed on both the abdominal surface side wrap surface and the back surface side wrap surface of both the fixed side wrap and the turning side wrap.   The said continuous fiber part is comprised so that the ratio of the said continuous fiber in the circumferential direction of this continuous fiber part may become higher than the ratio of the said continuous fiber in an axial direction. The resin scroll fluid machine according to one item. The discontinuous fiber part is formed by injecting a molten resin containing discontinuous fibers into the cavity part in a state where the preformed prepreg is held at a predetermined position of the cavity part in the mold. The resin scroll fluid machine according to any one of claims 2 to 6, wherein the scroll fluid machine is made of resin.

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