JPH0427787A - Scroll blade and manufacture thereof - Google Patents

Abstract

PURPOSE:To increase rigidity and make a scroll blade lightweight by covering a reinforcing member provided over and end plate section and a balde section with and base material so that the thickness of the reinforcing member of the blade section is made thicker at the root section than at the tip section. CONSTITUTION:A reinforcing member 42a made of a metal material is provided over the end plate section 40 and blade section 41 of a rotary scroll blade 4. The reinforcing member 42a is covered with a base material 43 made of a synthetic resin material. The thickness t1 at the root section of the reinforcing member 42a of the blade section 41 is made thicker than the thickness t2 at the tip section. The force of compression gas is applied to the blade section 41 in the height direction during the compression action, and its stress is larger at the root section than at the tip section. The thickness t1 at the root section of the reinforcing member 42 of the blade section 41 is made thicker than the thickness t2 at the tip section, the root section has large rigidity, and the reinforcing member 42a made of a synthetic resin material can be made lightweight.

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention (Industrial Application Field) The present invention relates to a scroll compressor that constitutes a refrigeration cycle of an air conditioner, for example, and particularly relates to a scroll type compressor that constitutes a compression mechanism thereof. and an improvement in a method for manufacturing scroll blades.

(Prior art) For example, compared to a normal rotary compressor used as a compressor that constitutes the refrigeration cycle of an air conditioner,
Scroll-type hermetic compressors, which have extremely low motion noise and high compression efficiency, are increasingly being used.

This scroll compressor is constructed as shown in FIG. That is, 1 is a closed case, and a support frame 2 is provided in this closed case 1 so as to partition the inside of the closed case 1 into upper and lower parts. In the upper part of the support frame 2, a fixed scroll blade 3 and an orbiting scroll blade 4 are meshed to form a compression chamber S, and a discharge side space on the side of the fixed scroll blade 3 is surrounded, and a discharge chamber 5 is formed inside. A scroll compression mechanism section 7 consisting of a valve cover 5 formed
will be provided. An electric motor section 10 consisting of a stator 8 and a rotor 9 is provided at the lower part of the support frame 2 .

These scroll compression mechanism section 7 and electric motor section 10 are connected via a main shaft 11.

In the hermetic compressor constructed in this manner, the electric motor section 10 is energized to drive the scroll compression mechanism section 7, and a fluid to be compressed, such as low-pressure refrigerant gas, is introduced from the suction pipe 12. Fill the airtight case 1. This refrigerant gas is sucked into the scroll compression mechanism 7 and compressed as the orbiting scroll blades 4 rotate.

Once the pressure has risen to a predetermined level, it is discharged into the discharge chamber 5 and further guided to external equipment via the discharge pipe 13. The electric motor section 10 is controlled to an optimal operating frequency according to the load, and air conditioning can be performed under optimal conditions.

(Problems to be Solved by the Invention) By the way, both the fixed scroll blade 3 and the orbiting scroll blade 4 have conventionally been formed of a metal material. As a result, each of these blades is heavy in weight, and while the orbiting scroll blade 4 in particular is desired to have a light orbiting motion, there is a problem in that vibrations are likely to occur. In order to attenuate such vibrations, for example, the balance weight 14 is made larger, but this is an obstacle to downsizing the entire compressor, and it also prevents an increase in bearing load due to large centrifugal force during high-speed operation. Problems such as ``Invitation'' occur.

As a prior application related to scroll blades, Utility Model Application No. 608493
Publication No. 1988-79088, Japanese Patent Publication No. 1988-7908-
There are ideas and inventions such as Japanese Patent Application Laid-open No. 294180 and Japanese Patent Application Laid-Open No. 62-284980. In all of these, the surface of the scroll blade is coated with a material different from the base material of the scroll blade, and the purpose is to improve wear resistance.

However, since all of these materials are base materials or metal materials that occupy the majority of the scroll blades, the weight reduction effect is small.

Furthermore, as disclosed in Japanese Patent Application Laid-Open No. 61-38187, the scroll blades are molded from a material mainly composed of synthetic resin, and a wear-resistant material is integrally applied to the sliding contact portion of each scroll blade. It is also known that it is equipped with

With such a scroll blade, it is possible to reduce the weight. However, since synthetic resin materials have lower strength than metal materials, they may suffer from problems such as deformation due to compressive loads and fatigue failure. Furthermore, synthetic resin materials have a higher coefficient of thermal expansion than metal materials, and when the gas becomes hot due to the compressive action on the refrigerant gas, there is a risk of thermal expansion and deformation.

Furthermore, in order to manufacture the above-mentioned scroll blades, a method using injection molding would be adopted in consideration of mass production, but according to this type of method, the synthetic resin material is first heated to a high temperature, then injected, and then , forced cooling or natural cooling must be used. Synthetic resin materials have a high coefficient of thermal expansion and therefore have a large amount of thermal contraction. Therefore, there is a risk that the completed dimensions will be smaller than the set dimensions due to heat shrinkage due to cooling after irradiation, and the manufacturing method is extremely difficult.

In addition, for the purpose of preventing deformation and destruction of scroll blades, for example, Japanese Utility Model Application Publication No. 17492/1982 and Japanese Utility Model Application No. 1/1999
No. 88086 is disclosed. That is, Japanese Utility Model Application No. 61-17492 is characterized in that a reinforcing member such as a bottle or a screw made of a material having higher strength and rigidity and the same coefficient of thermal expansion as the scroll member is fixed thereto. Japanese Utility Model Application Publication No. 188086 is characterized in that a scroll member made of a single material is provided with a reinforcing material having higher strength than the single material in the vicinity of the center of the spiral body.

However, sufficient consideration has not been given to the reinforcing member and the shape of the reinforcing material, and it has been difficult to form the scroll blade from a synthetic resin material.

The present invention has been made in view of the above circumstances, and its purpose is to increase rigidity and improve durability by covering a reinforcing member made of a metal material with a base material made of a synthetic resin material. It is an object of the present invention to provide a scroll blade that is lightweight, can be manufactured with high precision, and a manufacturing method thereof.

[Structure of the Invention] (Means and Effects for Solving the Problems) That is, the first invention is provided in a scroll type compressor, and includes an end plate portion and a spiral spiral erected at one end of the end plate portion. In the scroll wing consisting of a wing section, a reinforcing member made of a metal material is provided across the mirror plate section and the wing section, and this reinforcing member is covered with a base material made of a synthetic resin material, and the reinforcing member of the wing section is is a scroll blade characterized by having a thicker wall at its root than at its tip.

During compression, the force of the compressed gas is applied to the blade portion over its height, and the stress is greater at the root portion than at the tip portion. However, since the thickness of the root portion of the reinforcing member of the wing portion is made thicker than the thickness of the tip portion, the root portion can maintain greater rigidity, and the weight can be reduced by using the synthetic resin material.

A second invention provides a scroll blade that is included in a scroll compressor and includes an end plate portion and a spiral wing portion erected at one end of the end plate portion. A reinforcing member made of a metal material is provided, and this reinforcing member is covered with a base material made of a synthetic resin material. It is a scroll wing characterized by this.

In a scroll compressor, during compression, the center of the blade receives a stronger load than the outer periphery.

However, since the reinforcing member of the wing part has a reinforcement strength stronger at the center than at the outer peripheral part, the center part maintains greater rigidity, and the weight can be reduced by using a synthetic resin material.

A third aspect of the present invention is a scroll blade that is included in a scroll compressor and that includes an end plate and a spiral wing that is erected at one end of the end plate. A reinforcing member made of a metal material is provided, and this reinforcing member is covered with a base material made of a synthetic resin material. It is a scroll wing characterized by high height.

During compression, the temperature at the center becomes higher than the temperature at the outer periphery. Since the synthetic resin material has a large coefficient of thermal expansion, the high temperature portion expands more thermally. However, since the height of the center of the wing reinforcing member is made higher than the height of the outer circumference, the amount of synthetic resin material at the tip of the center is smaller than the amount of synthetic resin material at the tip of the outer circumference. As a result, the same amount of thermal expansion is achieved, a uniform height is maintained, and the weight is reduced due to the synthetic resin material.

A fourth aspect of the present invention is a scroll blade that is included in a scroll compressor and includes an end plate and a spiral wing section that is erected at one end of the end plate. A reinforcing member made of a metal material is provided, and this reinforcing member is covered with a base material made of a synthetic resin material. It is a scroll wing that is characterized by the following.

In a scroll compressor in which the end plate receives low back pressure during compression, the pressure difference between the compression chamber pressure and the back pressure is
The center portion of the mirror plate portion is larger than the peripheral edge portion. However, since the reinforcing member of the end plate is made thicker at the center than at the peripheral end, the center maintains greater rigidity and can be made lighter due to the synthetic resin material.

A fifth invention is a scroll blade that is included in a scroll compressor and includes an end plate portion and a spiral wing portion erected at one end of the end plate portion. A reinforcing member made of a metal material is provided, and this reinforcing member is covered with a synthetic resin material.
This scroll blade is characterized in that the wall thickness at the peripheral end portion is thicker than the wall thickness at the center portion.

In a scroll compressor in which the head plate receives high or intermediate back pressure during compression, the peripheral edge of the head plate is larger than the center, perhaps due to the pressure difference between the compression chamber pressure and the back pressure. becomes. However, since the reinforcing member of the end plate is made thicker at the peripheral end than at the center, the outer peripheral part maintains greater rigidity and is made lighter due to the synthetic resin material.

A sixth invention provides a method for manufacturing a scroll blade which is biased toward a scroll compressor and is comprised of an end plate portion and a spiral wing portion erected at one end of the end plate portion, which is substantially the same as the scroll blade. A reinforcing member made of a metal material is placed in the cavity of a mold having a shape in which the outer periphery forming part of the wing part is formed higher than the center forming part, and a reinforcing member made of a metal material is placed, and a reinforcing member made of a synthetic resin material as a base material is This is a method for manufacturing a scroll blade, which is characterized by injecting and molding.

The third aspect of the present invention is a manufacturing method for manufacturing a scroll blade having a blade portion in which the height of the center portion of the reinforcing member is higher than the height of the outer peripheral portion. Since the mold has a cavity in which the outer periphery forming part of the wing part is made higher than the center forming part, a larger amount of synthetic resin material is injected into the outer periphery forming part than the center forming part. In the cooling state after injection, the outer periphery forming part has a larger amount of thermal contraction than the center forming part, and when completed, the height of the wing parts will be uniform.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings. Since the scroll type compressor itself was previously explained based on FIG. 9, a new explanation will be omitted.

FIG. 1 shows an orbiting scroll blade 4. As shown in FIG. This is composed of a substantially disc-shaped end plate 40 and a spiral wing portion 41 erected at one end of the end plate 40, and the overall shape and dimensions remain the same. However, its structure consists of a reinforcing member 42a made of a metal material that is buried between the mirror plate part 40 and the wing part 41, and a base material made of a synthetic resin material that covers this reinforcing member 42a and forms the overall shape and dimensions. It consists of 43.

The reinforcing member 42a is selected from metal materials such as cast iron, aluminum alloy casting, and steel forging. The base material 43 is selected from synthetic resin materials such as polyimide resin and liquid crystal polymer.

The dimensions of the reinforcing member 42a are set as described below. That is, as a portion buried in the wing portion 41, the wall thickness t of the root portion 44 along the spiral shape is made sufficiently thick, and the wall thickness t2 of the tip portion 45, which is the upper end portion in the figure, is made sufficiently thick.
Make it thinner. To explain, the reinforcing member 42 of the wing portion 41
The cross-sectional shape of a is approximately a mountain shape that becomes thicker from the tip 45 to the root 44.

On the other hand, in the portion of the reinforcing member 42a that is embedded in the end plate portion 40, the wall thickness t3 of the central portion 46 is made sufficiently thick, and the wall thickness t4 of the peripheral end portion 47 is made thin. To explain, the end plate part 4
The cross-sectional shape of the reinforcing member 42a of No. 0 is such that it becomes thinner from the center portion 46 to the peripheral end portion 47.

In this way, since the thickness of the root portion 44 of the reinforcing member 42a embedded in the wing portion 41 is made thicker than the thickness of the tip portion 43, the root portion 44 maintains greater rigidity. Since the remaining portion is made of the base material 43 made of a synthetic resin material, weight reduction can be achieved due to the synthetic resin material.

Further, since the reinforcing member 42a of the mirror plate portion 40 has a center portion 46 thicker than a peripheral end portion 47, the center portion 46 maintains greater rigidity. Also here, since the remaining portion is made of the base material 43 made of synthetic resin material, weight reduction can be achieved due to the synthetic resin material.

During compression, as shown in FIG. 2(A), the pressure F1 of the compressed gas is applied to the wing section 41 over its entire length in the height direction. As shown in FIG. 2(B), the stress gradually increases from the tip to the root.

As shown in FIG. 1 again, the reinforcing member 42a of the wing portion 41 is formed to maintain high rigidity from the tip portion 43 to the root portion 44, so that it can withstand stress and reliably prevent damage and breakage over a long period of time. Protect.

Furthermore, a sealed case 1, particularly as shown in FIG.
In a low-pressure type compressor that is filled with low-pressure suction gas, during compression, the back surface of the end plate 40, which is the side where the wing portion 41 is not provided, is generally at low pressure (suction pressure). be. For this reason, the pressure on the back side of the end plate 40 (hereinafter referred to as
Looking at the pressure difference between the back pressure (abbreviated as back pressure) and the compression chamber S,
The pressure difference on the center side of the mirror plate portion 40 is large, and the pressure difference on the peripheral end side is small. However, since the reinforcing member 42a of the end plate portion 40 has a central portion 46 thicker than a peripheral end portion 47, the central portion 46 side maintains greater rigidity, and the strength is reduced due to compression. There are no negative effects.

Note that in the above embodiment, the reinforcing member 42a of the wing portion 41
Although the reinforcing members 42b are buried continuously along a spiral shape, the reinforcement members 42b are not limited to this, but as shown in FIG. ,
The spaces between these reinforcing members 42b may be filled with a base material 43 made of a synthetic resin material.

However, the reinforcing members 42b... are provided sparsely on the outer periphery,
They are arranged gradually closer to the center. That is, the wing section 4
The first reinforcing member 42b is formed such that the center portion 46 has stronger reinforcement strength than the outer peripheral portion 48.

With the compression action, suction gas is sucked in from the outer circumferential portion 48 side, and is sequentially sent to the center of the compression chamber S, which is the central portion 46 side, and is compressed. Therefore, the gas pressure applied to the wing portion 41 is stronger on the center side than on the outer peripheral side. On the other hand, the reinforcing members 42b of the wing portions 41...
Since it is formed to be stronger than the outer peripheral portion 48, there is no adverse effect on strength due to compression.

For example, as shown in FIG. 4(A), the reinforcing member 42
c, the portion buried in the mirror plate portion 40 is the disk-shaped reinforcing member 5.
0, and a plurality of L-shaped reinforcing members 51 are fixed to predetermined positions of this disc-shaped reinforcing member 50. Of course, the above-mentioned cross-shaped reinforcing members 51 are embedded in the wing portion 41. In this case, the intervals between the L-shaped reinforcing members 51 may be made uniform, and the plate thickness may be gradually increased from the outer peripheral portion 48 to the center portion 46 to increase the reinforcing strength.

As shown in FIG. 4(B), in this modified reinforcing member 42d, the portion buried in the end plate 40 is a disc-shaped reinforcing member 50. A cut and raised reinforcing member 52 is provided. Of course, the cut and raised reinforcing members 52 are embedded in the wing portion 41.

In the case of this reinforcing member 42d, all plate thicknesses are uniform,
Best of all, it is easy to process.

As shown in FIG. 4(C), in the reinforcing member 42e as a further modification, the portion buried in the end plate portion 40 is a disc-shaped reinforcing member 53, and the reinforcing member 42e is folded back at a predetermined position of this disc-shaped reinforcing member 53. A reinforcing portion 54 is integrally provided. Of course, the folded reinforcing member 54 is embedded in the wing portion 41.

Since this reinforcing member 42e is obtained by drawing, it is convenient for mass production, similar to the reinforcing member 42e shown in FIG. 4(B).

The reinforcing member 42f shown in FIG.
It is formed higher than the height dimension h2 of.

That is, the gas that is sequentially sent to the center portion 46 of the compression chamber S and compressed becomes high in temperature as the pressure increases.

Of course, in the orbiting scroll blade 4, the center portion 46
However, the temperature of the base material 4 is higher than that of the outer peripheral portion 48.
The synthetic resin material used as No. 3 generally has a higher coefficient of thermal expansion than metal materials. From this, as shown in FIG. 6, if the orbiting scroll blades are entirely made of synthetic resin material, the height of the center portion 46 will be larger than the height L2 of the outer peripheral portion 48 due to the compression action. It gets expensive.

Therefore, as shown in FIG. 5 again, the height of the center portion 46 of the reinforcing member 42f in the wing portion 41 is determined.

is formed higher than the height dimension h2 of the outer peripheral portion 48. However, the height dimension of the wing portion 41 is the same over the entire circumference. As a result, the thickness (amount) of the base material 43 extending from the tip of the center portion 46 to the tip of the wing portion 41 of the reinforcing member 42f is small, and the thickness (amount) of the base material 43 extending from the tip of the outer peripheral portion 48 to the tip of the wing portion 41 is large. becomes.

As described above, the synthetic resin material used as the base material 43 has a large coefficient of thermal expansion, and the center portion 46 is more affected by the heat of the base temperature than the outer peripheral portion 48. Therefore, at the tip of the wing portion 41, due to the amount of the base material 43, the outer peripheral portion 48 undergoes a large thermal expansion deformation, and the central portion 46 undergoes a small thermal expansion deformation. During such compression, the height h3 of the wing portion 41 remains uniform over the entire circumference even if it undergoes thermal expansion deformation.

FIG. 7 shows a reinforcing member 42 attached to the wing section 41 shown in FIG.
This is a mold for manufacturing an orbiting scroll blade 4 having f. That is, the reinforcing member 42f having the shape described above is temporarily held in the cavity 22 of the mold consisting of the upper mold 20 and the lower mold 21, and the reinforcing member 42f is injected and filled with a synthetic resin material, and the mold is released after cooling. As a result, the orbiting scroll blade 4 having the above-described shape and structure is obtained.

Here, the cavity 22 of the upper mold 20 has an outer peripheral forming portion 48a.
The height dimension is the center height dimension.

Form higher than. Therefore, the amount of resin injected and filled is larger in the outer peripheral portion 48 and smaller in the center portion 46. As explained above, a characteristic of synthetic resin materials is that they have a large coefficient of thermal expansion, and therefore the amount of thermal contraction is also large. The outer peripheral portion 48, which is filled with a larger amount of synthetic resin material, has a greater amount of heat shrinkage than the central portion 46, which is filled with a smaller amount. As a result, in the completed state, the height dimension of the wing portion 41 becomes uniform over the entire length as shown in FIG.

Note that the scroll type compressor may be of a low-pressure type in the closed case 1 as previously explained in FIG. There are two types of high-pressure type in a sealed case, which are discharged to the outside. In such a high-pressure type, the end plate portion 40 of the orbiting scroll blade 4 receives a high back pressure which is the same as the discharge pressure. Alternatively, the mirror plate portion 4
Some compressors have a structure that receives a pressure between the suction pressure and the discharge pressure at 0 as back pressure.

In these compressors, the pressure difference between the compression chamber S and the back pressure at the center 46 of the end plate 40 is caused by
The pressure difference between the back pressure and the back pressure at That is,
The outer peripheral portion 48 will receive greater pressure.

Therefore, as shown in FIG. 8, the reinforcing member 42g in the mirror plate part 40 is designed so that the plate ff' t :l of the peripheral end part 47 is lower than the thickness t4 of the central part 46, thereby increasing the strength of the peripheral part 47. By increasing , it is possible to adapt to a structure in which the end plate portion 40 is subjected to high pressure or intermediate pressure back pressure.

[Effects of the Invention] As explained above, according to the present invention, since the thickness of the root portion of the reinforcing member in the wing portion is made thicker than the thickness of the tip portion, the root portion is larger than the tip portion of the wing portion. It can maintain the optimal rigidity corresponding to a certain stress, and has the effect of improving durability and reducing weight.

Furthermore, according to the present invention, the reinforcement strength at the center of the reinforcing member in the wing section is made stronger than the reinforcement strength at the outer periphery, so even if the center section of the wing receives a stronger load than the outer periphery, the optimal It has the effect of maintaining rigidity, improving durability, and reducing weight.

Further, according to the present invention, since the height of the center of the reinforcing member in the wing section is made higher than the height of the outer periphery, the temperature of the center becomes higher than the temperature of the outer periphery, and the synthetic resin material increases. Under the influence of heat due to its characteristic large coefficient of thermal expansion, it maintains a uniform height over the entire wing section,
Improved compression efficiency and reduced weight due to synthetic resin material.

Further, according to the present invention, since the wall thickness of the center part of the reinforcing member in the head plate part is made thicker than the wall thickness of the peripheral end part, the center part of the head plate part becomes the high pressure side, and the load exerts a stronger influence than the outer peripheral part. It is possible to maintain optimal rigidity against the elements, resulting in improved durability and weight reduction.

Further, according to the present invention, since the wall thickness of the peripheral end of the reinforcement part I in the head plate part is made thicker than the wall thickness of the center part, the head plate part is particularly characterized by a structure in which the back pressure of high pressure or intermediate pressure is applied. , the pressure difference between the compression chamber pressure and the back pressure is larger at the outer periphery of the end plate than at the center, so it maintains optimal rigidity, improving durability and reducing weight. It has the effect of obtaining.

Further, according to the present invention, a reinforcing member made of a metal material is placed in the cavity of the mold, which has approximately the same shape as the scroll blade, and in which the outer circumference forming part of the wing part is formed higher than the center forming part, and Since the resin material is manufactured by injection molding, when manufacturing a scroll blade having a wing portion in which the height of the center of the reinforcing member is higher than the height of the outer periphery, it is necessary to Since a larger amount of synthetic resin material is injected than the forming part, the cooling after injection causes a large thermal contraction of the outer peripheral forming part, and when completed, the height of the wing parts will all be uniform. Therefore, it is possible to eliminate the need for dimensional adjustment and improve manufacturability.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional view of a scroll blade showing an embodiment of the present invention, Figure 2 (A) is an explanatory diagram of the action of gas pressure on the blade during compression, and Figure 2 (B) is the stress generation. Explanatory diagrams of the state, FIGS. 3 to 5 show other embodiments of the present invention that are different from each other, FIG. 3 is a cross-sectional plan view of the blade part of the scroll blade, and FIGS. A partial vertical cross-sectional view of a scroll blade equipped with different reinforcing members, FIG. 5 is a vertical cross-sectional view of the scroll blade, FIG. 6 is a diagram illustrating the state of thermal deformation of the scroll blade, and FIG. 7 is a diagram showing the manufacturing of the scroll blade. FIG. 8 is a vertical cross-sectional view of a scroll blade showing another embodiment of the present invention, which is a further different embodiment of the present invention.
FIG. 9 is a partially omitted vertical cross-sectional view of a general scroll compressor. 40... End plate portion, 41... Wing portion, 4... Orbiting scroll wing, 42a to 42g... Reinforcement member, 43...
Base material, 44... Root part, 43... Tip part, 46... Center part, 48... Outer periphery part, 47... Peripheral end part, K...
Mold, 48a: outer periphery forming part, 46a: center forming part, 22: cavity part.

Claims (6)

[Claims] (1) In a scroll blade that is included in a scroll compressor and consists of an end plate and a spiral wing section that is erected at one end of the end plate, a metal material is used across the end plate and the wing. A reinforcing member is provided, and this reinforcing member is covered with a base material made of a synthetic resin material, and the reinforcing member of the wing portion is characterized in that the thickness of the root portion is thicker than the thickness of the tip portion. Scroll wings. (2) In a scroll blade that is included in a scroll compressor and consists of an end plate and a spiral wing section that is erected at one end of the end plate, a metal material is used across the end plate and the wing. A reinforcing member is provided, and this reinforcing member is covered with a base material made of a synthetic resin material, and the reinforcing member for the wing portion is characterized in that the reinforcing strength at the center portion thereof is made stronger than the reinforcing strength at the outer peripheral portion. Scroll wings. (3) In a scroll blade that is included in a scroll compressor and consists of an end plate and a spiral wing section that is erected at one end of the end plate, a metal material is used across the end plate and the wing. A reinforcing member is provided, and this reinforcing member is covered with a base material made of a synthetic resin material, and the height of the reinforcing member of the wing portion is set higher at the center than at the outer periphery. Scroll wings featuring. (4) In a scroll blade that is included in a scroll compressor and consists of a head plate and a spiral wing that is erected at one end of the head plate, a metal material is used across the head plate and the blade. A reinforcing member is provided, and this reinforcing member is covered with a base material made of a synthetic resin material. Features scroll wings. (5) In a scroll blade that is included in a scroll compressor and consists of an end plate and a spiral wing section that is erected at one end of the end plate, a metal material is used across the end plate and the wing. A reinforcing member is provided, and this reinforcing member is covered with a base material made of a synthetic resin material. Features scroll wings. (6) In a method for manufacturing a scroll blade that is included in a scroll compressor and includes an end plate portion and a spiral wing portion erected at one end of the end plate portion, the scroll blade has substantially the same shape as the scroll blade; and in the cavity of the mold having a cavity in which the outer periphery forming part of the wing part is formed higher than the center forming part,
A method for manufacturing a scroll blade, which comprises arranging a reinforcing member made of a metal material and injecting and molding a synthetic resin material as a base material.