WO2018230254A1

WO2018230254A1 - Cross flow fan manufacturing method, and cross flow fan manufacturing device

Info

Publication number: WO2018230254A1
Application number: PCT/JP2018/019245
Authority: WO
Inventors: 佑規伊東; 古川　仁一
Original assignee: 三菱電機株式会社
Priority date: 2017-06-12
Filing date: 2018-05-18
Publication date: 2018-12-20
Also published as: JPWO2018230254A1; JP6708361B2

Abstract

Provided is a cross flow fan of which an internal stress is reduced without detracting from manufacturing efficiency. During the manufacture of the cross flow fan, fan components (1, 2, 3) are ultrasonically welded and assembled while being rotated around a fan rotating shaft. Application of force to the cross flow fan in an unwanted rotating direction for ultrasonic welding can be suppressed, making it possible to reduce an internal stress due to ultrasonic welding.

Description

Cross flow fan manufacturing method and cross flow fan manufacturing apparatus

The present application relates to a manufacturing method and a manufacturing apparatus of a cross flow fan in which a plurality of thermoplastic resin moldings are welded and assembled.

For resin cross flow fans, resin molded bodies that are integrally molded by a mold, such as a disc and a large number of blades, are prepared (resin molding process), and then superimposed in the direction of the rotation axis of the fan to form these resin moldings It is well known that the resin molded bodies are welded together by applying ultrasonic vibration while pressing the assembly of bodies in the direction of the rotation axis (ultrasonic welding process). However, in the case of the product manufactured by this method, the distortion after the ultrasonic welding process is caused by the distortion of the aggregate after the ultrasonic welding process, thereby removing the distortion. Yes.
In addition, the hollow structure fan parts obtained by gas-assist molding can produce cross flow fan components (molded products) with good melt fluidity, eliminating the need for annealing after the ultrasonic welding process. Is known (see, for example, Patent Document 1).

JP-A-9-112491

The annealing of the entire assembly of the resin molded bodies after ultrasonic welding must be matched with the fan components that require the annealing temperature to be set low, so that it is necessary to set the annealing time longer and the manufacturing efficiency is impaired. Further, in the gas assist molding, it is necessary to stop the injection of the resin and to switch to the gas injection before the mold product part is completely filled with the resin. Generally, in order to prevent the resin from flowing back to the injection molding machine during gas injection, the injection nozzle is plugged with a needle valve or the like. Since the resin and gas injection operation stops during this operation, the resin cools and solidifies in the case of a thin wall such as a blade of a crossflow fan. For this reason, there is a problem that the blade of one part cannot be lengthened and the number of parts increases. Thereby, the frequency | count of the ultrasonic welding performed in order to assemble a cross flow fan increases, and manufacturing efficiency deteriorates.
This application solves such a subject and aims at assembling a cross flow fan, without deteriorating manufacturing efficiency.

The manufacturing method of the cross flow fan disclosed in the present application is as follows.
It has a first step of injecting resin into the mold and molding the fan parts, and a second step of ultrasonically welding and laminating the molded fan parts without stopping at the same rotational speed. .

According to the method of manufacturing a cross flow fan disclosed in the present application, a cross flow fan with less internal stress can be obtained without impairing the manufacturing efficiency.

FIG. 3 is a plan view of the cross flow fan according to the first embodiment. FIG. 3 is a diagram illustrating a manufacturing flow of the cross flow fan according to the first embodiment. It is a figure explaining the metal mold | die temperature control of Embodiment 1. FIG. It is a schematic block diagram of the ultrasonic welding apparatus for assembling the cross flow fan of Embodiment 1, FIG. 4A shows a front view, and FIG. 4B shows a side view. It is an enlarged view of the table of the ultrasonic welding apparatus of FIG. It is a figure explaining operation | movement of the ultrasonic welding apparatus of FIG. 4, and shows the procedure of operation | movement in order of FIG. 6A, FIG. 6B, FIG. 6C, and FIG. It is explanatory drawing which shows the result of the durability test of the crossflow fan of Embodiment 1. FIG. It is a schematic block diagram of the ultrasonic welding apparatus for assembling the cross flow fan of Embodiment 2, FIG. 8A shows a front view, and FIG. 8B shows a side view. It is a figure explaining operation | movement of the ultrasonic welding apparatus of FIG. 8, and shows the procedure of operation | movement in order of FIG. 9A, FIG. 9B, FIG. 9C, and FIG. FIG. 10 is a diagram showing a manufacturing flow of the cross flow fan of the second embodiment. It is a figure which shows the result of the durability test of the crossflow fan of Embodiment 2. FIG. It is a figure which shows the annealing conditions at the time of annealing processing with the fan component single-piece | unit of the crossflow fan of Embodiment 3. FIG. It is a figure which shows the manufacture flow of the crossflow fan of Embodiment 4. FIG. FIG. 6 is a schematic configuration diagram of a mold for molding a fan part of a crossflow fan according to a fourth embodiment. It is a front view of the plate part of the metal mold | die of FIG. It is explanatory drawing explaining operation | movement of the metal mold | die of FIG. 14, and shows the procedure of operation | movement according to the order of FIG. 16A and FIG. 16B.

Embodiment 1 FIG.
Hereinafter, the crossflow fan according to the first embodiment and the manufacturing method thereof will be described. FIG. 1 is a diagram of a cross flow fan. The cross-flow fan has an end plate 1 as a fan component, an intermediate fan 2 in which blades are integrated with the plate, and a blade in which blades are integrated with a plate provided with a fitting portion with a rotating shaft. It is comprised with the fan 3.
FIG. 2 is a diagram showing a manufacturing flow of the cross flow fan according to the first embodiment.
First, as step ST1, fan parts are manufactured. By holding the mold at a temperature higher than the deflection temperature under load when injecting the resin, almost no pressure is applied to the resin when injecting the resin into the mold, so that the molded product (end plate 1, An intermediate fan 2 and an end fan 3) can be obtained.

In addition, when a metal mold | die is high temperature, it is necessary to lengthen the cooling time until taking out a molded article, a molding cycle is extended and productivity deteriorates remarkably. Therefore, only when the resin is injected into the mold, the mold is kept at a high temperature that is equal to or higher than the deflection temperature under load. Cool molding method). An example of mold temperature control at that time is shown in FIG. The medium for raising the mold temperature may be water vapor, hot water, hot oil, or the like having a high medium temperature.
Even when the temperature of the mold is not increased, the space in the mold is reduced to a pressure lower than the atmospheric pressure when the resin is injected into the mold, so that the resin is injected into the mold when the resin is injected into the mold. Since the applied pressure can be reduced, the same effect of reducing internal stress can be obtained.

Next, in step ST2, the molded product manufactured in step ST1 is assembled into a cross flow fan. 4 is a schematic configuration diagram of an ultrasonic welding apparatus 100 that is a manufacturing apparatus for assembling the cross flow fan according to Embodiment 1, FIG. 4A is a front view, and FIG. 4B is a side view. The ultrasonic welding apparatus 100 holds a fan component and moves the holding mechanism 10 in the vertical direction, a positioning mechanism 20 for positioning the fan component, and an ultrasonic wave for applying ultrasonic vibration to the fan component. It consists of a mechanism 30.
The holding mechanism 10 includes a table 11 that is inserted so that the rotation shaft portion 1a of the end plate 1 shown in FIG. 1 faces downward, and a moving mechanism 12 that moves the table 11 perpendicularly to the direction of the ultrasonic mechanism 30. The connecting mechanism 13 is used to connect the table 11 to the moving mechanism 12. As shown in FIG. 5, the table 11 has a structure in which a bearing 14 is attached to the insertion portion of the rotating shaft portion 1a, and the end plate 1 can freely rotate around the rotating shaft portion 1a. The moving mechanism 12 is a linear servo motor in FIG. 4B, but if the table 11 is a mechanism that can move to a desired position at a desired speed, a servo motor combined with a linear guide or a ball screw mechanism, or an air cylinder It may be.

The positioning mechanism 20 is parallel to the shaft center of the bearing 14 shown in FIG. 5 and is provided with at least three columnar guide bars 21 and a rotation for rotating the bearings 22 and the guide bars 21 of the guide bars 21. It consists of a mechanism 23. The guide bar 21 is attached to an equipment frame (not shown) via a moving mechanism 24 so that when the fan parts are ultrasonically welded, the work of attaching the fan parts to the table 11 can be opened and closed without disturbing the guide bar 21. It is configured. The rotation mechanism 23 is preferably a motor that can easily control the number of rotations when ultrasonic welding of a plurality of types of fan parts, but may be a rotary cylinder when only specific fan parts are ultrasonically welded.

The ultrasonic mechanism 30 includes a vibrator 31 of an ultrasonic welder, a tool horn 32 fixed to the vibrator 31, and a moving mechanism 33 of the vibrator 31. The tool horn 32 is provided concentrically with the axis of the bearing 14 provided on the table 11. The moving mechanism 33 is an air cylinder in the figure. However, if the vibrator 31 is a device that can move to a desired position at a desired speed, a servo motor combined with a linear guide or a ball screw mechanism, or a linear servo motor. It may be.

Next, the operation when the cross flow fan is assembled using the ultrasonic welding apparatus 100 will be described with reference to FIG. First, in FIG. 6, as shown in FIG. 6A, the end plate 1 is attached to the table 11 with the rotating shaft portion 1 a facing down. Thereafter, the intermediate fan 2 is placed on the end plate 1 with the blade portion 2a facing down. Next, as shown in FIG. 6B, the guide rod 21 is advanced by the moving mechanism 24, and the axial center of the intermediate fan 2, the axial center of the tool horn 32, and the axial center of the bearing 14 provided on the table 11 are aligned. In this state, as shown in FIG. 6C, the tool horn 32 is lowered and pressurizes the intermediate fan 2. Thereafter, as shown in FIG. 6D, the guide rod 21 is rotated by the rotation mechanism 23, whereby the end plate 1 and the intermediate fan 2 are rotated at the same rotation speed. When the end plate 1 and the intermediate fan 2 are rotated without stopping, the vibrator 31 is vibrated by an oscillator (not shown), so that the tool horn 32 is also vibrated, the intermediate fan 2 is vibrated, and the blade portion of the intermediate fan 2 The tip of 2a and the end plate 1 are ultrasonically welded. At this time, the pressure applied by the tool horn 32 and the time during which the tool horn 32 vibrates are such that sufficient welding strength can be obtained between the blade portion 2a and the end plate 1, and the pressure and vibration time are determined by the cross flow fan. It is determined by size, number of parts, etc. For example, in the case of a cross flow fan using AS (acrylic-styrene) resin mixed with 20% glass fiber and having an outer diameter of 100 to 110 mm, a length of 600 to 700 mm, and 8 to 10 parts, the pressure is 0. A sufficient welding strength can be obtained in about 2 to 0.7 MPa and a vibration time of about 0.5 to 3 seconds.

After the welding is completed, the tool horn 32, the guide bar 21, and the table 11 are returned to the original position, which is the initial position, in the reverse procedure. By repeating this process, the next intermediate fan 2 is stacked on the already welded intermediate fan 2, and finally the end fan 3 is welded. In this description, it is described that the tool horn 32, the guide bar 21, and the table 11 are returned to the origin every time they are welded. However, in order to shorten the production cycle, the next fan part can be inserted in the middle. You can stop it. Further, when the rotation mechanism 23 is a motor, the guide rod 21 can be freely rotated in a state where the brake of the motor is released, and the fan component is directly applied to the fan component for welding by, for example, wind. May be rotated.

According to such a configuration, since the crossflow fan is rotating when pressurized and vibrated by the tool horn 32, it is compared with a case where ultrasonic waves are used while the crossflow fan is fixed so as not to move. Thus, it is possible to suppress the force in the rotational direction unnecessary for the ultrasonic welding from being applied to the cross flow fan, and to reduce the internal stress caused by the ultrasonic welding. The rotational speed at which the cross flow fan is ultrasonically welded is such that internal stress due to ultrasonic welding is not generated, and the speed is determined by the size of the crossflow fan, the number of parts, and the like. As an example, in the case of a cross flow fan using AS (acryl-styrene) resin mixed with 20% glass fiber and having an outer diameter of 100 to 110 mm, a length of 600 to 700 mm, and 8 to 10 parts, the rotational speed is 60 rpm. It is possible to suppress internal stress due to ultrasonic welding. Furthermore, by incorporating a device that measures the internal stress of the fan component after ultrasonic welding (for example, an X-ray diffractometer) via a control circuit, the rotational speed of the fan component is automatically controlled so that the internal stress is minimized. And you can assemble a cross flow fan.

The results of the durability test of the cross flow fan manufactured in such a manufacturing flow are shown in FIG. In the durability test, the amount of deformation in the rotation direction when rotating at 2000 ° C. or less at 60 ° C. or less was evaluated. According to FIG. 7, there is no significant difference in the amount of deformation between the case where the annealing process is performed by the manufacturing method according to the prior art and the case where the annealing method is not performed by the manufacturing method according to the first embodiment. It turns out that an annealing process is unnecessary.

Embodiment 2. FIG.
FIG. 8 is a conceptual diagram showing the ultrasonic welding apparatus 200 when assembling the cross flow fan according to the second embodiment, FIG. 8A is a front view, and FIG. 8B is a side view. In the second embodiment, the fan parts (end plate 1, intermediate fan 2, and end fan 3) prepared by the method described in the first embodiment are assembled by the ultrasonic welding apparatus 200 shown in FIG.
The ultrasonic welding apparatus 200 includes a holding mechanism 40 for holding and moving the fan component in the vertical direction, a positioning mechanism 50 for positioning the fan component, and an ultrasonic mechanism 30 for applying ultrasonic vibration to the fan. Consists of. The holding mechanism 40 connects the table 41 inserted so that the rotation shaft portion 1a of the end plate 1 faces downward, the moving mechanism 42 for moving the table 41 in the vertical direction, and the table 41 to the moving mechanism 42. And a rotating mechanism 44 that rotates the rotating shaft portion 1a of the end plate 1 held by the table 41 about the rotating shaft. The moving mechanism 42 is a linear servo motor in FIG. 8B. However, if the table 41 is a device that can move to a desired position at a desired speed, a linear motor, a servo motor combined with a ball screw mechanism, or an air It may be a cylinder.

The rotation mechanism 44 is preferably a motor that can easily control the number of rotations when ultrasonic welding of a plurality of types of fan parts, but may be a rotary cylinder when only specific fan parts are ultrasonically welded. 1 is provided with a mechanism for chucking the rotary shaft portion 1a of the end plate 1 shown in FIG.
The positioning mechanism 50 includes a cylindrical guide bar 51 provided in at least three locations in parallel with the rotation axis center of the rotation mechanism 44 and a support bar 53 that holds the guide bar 51 rotatably via a bearing 52. The support bar 53 is attached to an equipment frame (not shown) via a moving mechanism 54, and can be opened and closed so that the guide bar 51 does not interfere with the work of attaching the fan part to the table 41 when the fan part is ultrasonically welded. It is configured as follows. The ultrasonic mechanism 30 is the same as that described in the first embodiment.

Next, the operation when the cross flow fan is assembled using the ultrasonic welding apparatus 200 will be described with reference to FIG. First, as shown in FIG. 9A in FIG. 9, the end plate 1 is attached to the table 41 with the rotary shaft portion 1a facing down. Thereafter, the intermediate fan 2 is placed on the end plate 1 with the blade portion 2a facing down. Next, as shown in FIG. 9B, the guide bar 51 is advanced by the moving mechanism 54, and the axis of the intermediate fan 2, the axis of the tool horn 32, and the axis of the rotating shaft of the rotating mechanism 44 are matched. In this state, as shown in FIG. 9C, the tool horn 32 is lowered to pressurize the intermediate fan 2. Thereafter, as shown in FIG. 9D, the rotating shaft 1a of the end plate 1 is rotated by the rotating mechanism 44, whereby the end plate 1 and the intermediate fan 2 rotate at the same rotational speed. When the end plate 1 and the intermediate fan 2 are rotated without stopping, the vibrator 31 is vibrated by an oscillator (not shown), so that the tool horn 32 is also vibrated, the intermediate fan 2 is vibrated, and the blade portion of the intermediate fan 2 The tip of 2a and the end plate 1 are ultrasonically welded. At this time, the pressure applied by the tool horn 32 and the time during which the tool horn 32 vibrates are such that sufficient welding strength can be obtained between the blade portion 2a and the end plate 1, and the pressure and vibration time are determined by the cross flow fan. It is determined by size, number of parts, etc. For example, in the case of a cross flow fan using AS (acrylic-styrene) resin mixed with 20% glass fiber and having an outer diameter of 100 to 110 mm, a length of 600 to 700 mm, and 8 to 10 parts, the pressure is 0. Sufficient welding strength can be obtained in about 2 to 0.7 MPa and vibration time of 0.5 to 3 seconds.

After the welding is completed, the tool horn 32, the guide bar 51, and the table 41 are returned to the initial position, which is the initial position, in the reverse order of the described procedure. By repeating this, the next intermediate fan 2 is stacked on the already welded intermediate fan 2, and finally the end fan 3 is welded. In this description, it is described that the tool horn 32, the guide bar 51, and the table 41 are returned to the origin every time they are welded. However, in order to shorten the production cycle, the next fan part can be inserted in the middle. You can stop it. Further, in a state in which the rotating shaft 1a is not chucked by the rotating mechanism 44 (that is, in a state where the fan component can freely rotate), the fan component for welding may be rotated directly by applying an external force, for example, with wind. .

With such a configuration, since the cross flow fan rotates when being pressed and vibrated by the tool horn 32, the internal stress caused by ultrasonic welding is reduced as in the effect described in the first embodiment. It can be reduced.

Embodiment 3 FIG.
FIG. 10 is a diagram illustrating a manufacturing flow of the cross flow fan according to the third embodiment. In the third embodiment, as shown in FIG. 3, the fan components (end plate 1, intermediate fan 2, end fan 3) are formed by a normal forming method in which the mold temperature is not changed by the process (step ST101). Thereafter, an annealing process is performed on the fan components alone before assembly by ultrasonic welding (step ST102). After the annealing process, the cross flow fan is assembled by ultrasonic welding using the

ultrasonic welding apparatuses

100 and 200 shown in the first or second embodiment (step ST103).

FIG. 11 shows the result of the durability test of the cross flow fan manufactured in the manufacturing flow as shown in FIG. In the durability test, the amount of deformation in the rotation direction when rotating at 2000 ° C. at 60 ° C. was evaluated. Referring to FIG. 11, in the manufacturing method according to the prior art, when the annealing process is performed after welding, and according to the third embodiment, the annealing is performed with the

ultrasonic welding apparatuses

100 and 200 after annealing the fan components alone. It can be seen that there is no significant difference in the amount of deformation between the method and the manufacturing method according to Embodiment 3 does not require the annealing process after the assembly of the crossflow fan.

Annealing conditions according to each fan component can be set by annealing the fan component alone as described above. That is, since a metal shaft is generally used for the rotating shaft portion 1a of the end plate 1, it is preferable to anneal at a low temperature in order to suppress the tilt of the shaft. In addition, a boss is embedded in the terminal fan 3 so as to be assembled to the motor. Generally, a rubber boss is used in order to secure a tolerance for assembly in the motor. In order to suppress the deterioration of the rubber, it is preferable to anneal at a lower temperature than the intermediate fan 2. For these reasons, when annealing as a cross-flow fan after assembly, the annealing time has to be lengthened because the temperature is set according to the fan component that requires the lowest temperature setting. By annealing the fan component parts as described above, the annealing temperature can be increased for the intermediate fan 2, so that the annealing time can be shortened.

As an example, FIG. 12 shows an annealing condition when a cross-flow fan using AS (acrylic-styrene) resin mixed with 20% glass fiber is annealed in a batch processing thermostat. Since the annealing time of the intermediate fan 2 can be halved, productivity is improved. Needless to say, even in cases other than the annealing processing method described with reference to FIG. 12, such as an in-line annealing apparatus or an annealing method using infrared rays, each component can be processed in an optimal processing time.

Embodiment 4 FIG.
FIG. 13 is a diagram illustrating a manufacturing flow of the cross flow fan according to the fourth embodiment. In the fourth embodiment, a fan component (end plate 1, intermediate fan 2, end fan 3) is molded by injecting resin into a mold cavity that is opened in advance by a predetermined amount, and then the cavity is compressed (so-called injection compression molding). (Step ST201). FIGS. 14, 15 and 16 show the structure of a mold 60 for molding the fan component (the intermediate fan 2 in the example shown) in the fourth embodiment. FIG. 14 is a cross-sectional view of the mold 60, FIG. 15 is a front view of the plate portion 64, and FIG. The mold 60 includes a mold cavity of a fixed mold 61 and a movable mold 62. The movable mold 62 is a base part 63, a plate part 64 fixed to the base part 63, and a compression that is fitted to the base part 63 so as to be able to rotate in the thickness direction of the blade part 2a (see FIG. 6 or FIG. 9). It comprises a fixed portion 66 fixed to the portion 65 and the base portion 63. The plate part 64 is provided with a molding part 67 of the plate part of the intermediate fan 2 and a molding part 68a of the blade part 2a. In order to help understanding, the forming

portions

68, 68a, 68b, 68c of the blade portion 2a of the intermediate fan 2 are indicated by hatched portions in the drawing.

Next, a procedure for forming the intermediate fan 2 using the mold 60 will be described. Before injecting the resin, as shown in FIG. 16A, the compression portion 65 is opened in a certain amount so that the molding portion 68b of the blade portion 2a formed by the compression portion 65 and the fixing portion 66 is thicker than the blade portion 2a. is there. After the resin is injected into the mold 60 and the molding portion 68 is filled with about 80%, the compression portion 65 rotates counterclockwise as shown in FIG. 16B and compresses the resin to fill the molding portion 68 with the resin. . The shape of the molded part 68c formed by the compressed compression part 65 and the fixed part 66 after rotation matches the molded part 68a provided on the plate part 64, and is aligned in a straight line in the length direction of the blade part 2a. Yes. Although means for rotating the compression unit 65 is not shown, if the rotation operation of the compression unit 65 can be finished before the resin injected into the mold 60 is cooled and solidified, a hydraulic cylinder, an air cylinder, or a slide mechanism can be used. Anything using the opening and closing operation of the mold may be used. Although not shown and described here because the mold structure is simplified, it is assumed that the mold 60 generally has the structure and functions necessary for the molding mold as appropriate. In this way, by filling the mold cavity with the resin using the compression operation by the mold, it is possible to fill the thin blade portion, which originally needs to be filled with the resin at a high pressure, with the resin at a low pressure. Therefore, a molded product (end plate 1, intermediate fan 2, end fan 3) with less internal stress can be obtained.

Thereafter, the molded product manufactured in step ST201 is ultrasonically welded by the

ultrasonic welding apparatuses

100 and 200 shown in the first or second embodiment to assemble a cross flow fan (step ST202). Since the crossflow fan manufactured by such a procedure is composed of a molded product having a low internal stress as in the crossflow fan described in the first or second embodiment, an annealing process after assembly is not required. Needless to say, there are.

Although this application describes various exemplary embodiments and examples, various features, aspects, and functions described in one or more embodiments may be applied to particular embodiments. The present invention is not limited to this, and can be applied to the embodiments alone or in various combinations.
Accordingly, countless variations that are not illustrated are envisaged within the scope of the technology disclosed herein. For example, the case where at least one component is deformed, the case where the component is added or omitted, the case where the at least one component is extracted and combined with the component of another embodiment are included.

1: End plate, 1a: Rotating shaft part, 2: Intermediate fan, 2a: Blade part, 3: End fan, 10, 40: Holding mechanism, 11, 41: Table, 12, 24, 33, 42, 54: Movement Mechanism, 13, 43: coupling mechanism, 14, 22, 52: bearing, 20, 50: positioning mechanism, 21, 51: guide rod, 23, 44: rotating mechanism, 30: ultrasonic mechanism, 31: vibrator, 32 : Tool horn, 53: Support rod, 60: Mold, 61: Fixed mold, 62: Movable mold, 63: Base part, 64: Plate part, 65: Compression part, 66: Fixed part, 67: Molding of plate part Part, 68, 68a, 68b, 68c: molding part of

blade part

2a, 100, 200: ultrasonic welding apparatus.

Claims

It has a first step of injecting resin into the mold and molding the fan parts, and a second step of ultrasonically welding and laminating the molded fan parts without stopping at the same rotational speed. A manufacturing method of a cross flow fan.
The method of manufacturing a cross flow fan according to claim 1, wherein the inside of the mold is depressurized from the atmospheric pressure at the time of resin injection.
2. The method of manufacturing a cross flow fan according to claim 1, wherein the mold is injected at a temperature equal to or higher than a deflection temperature under load of the thermoplastic resin.
4. The method of manufacturing a cross flow fan according to claim 3, wherein the molding cycle is shortened by rapidly cooling the mold after the resin has been injected into the mold.
2. The cloth according to claim 1, wherein a resin is injected in a state where a predetermined amount of a mold cavity constituting the mold is opened, and then the mold cavity is compressed to mold the fan part. A method of manufacturing a flow fan.
The method of manufacturing a crossflow fan according to claim 1, further comprising a third step of annealing the fan component between the first step and the second step.
The fan component includes an end plate, a plurality of intermediate fans having a shape in which blades are integrated with the plate, and a terminal fan having a shape in which the blades are integrated with a plate provided with a fitting portion with a rotating shaft, 7. The end plate, the plurality of intermediate fans, and the end fan are ultrasonically welded and laminated in this order so that the axis of rotation of the end plate coincides with the axis of the end plate. The manufacturing method of the cross flow fan of one term.
A holding mechanism for holding a fan part, an axial center of the fan part and an ultrasonic mechanism for adding ultrasonic vibration, and positioning for matching the axial center of fan parts to which ultrasonic vibration is applied by the ultrasonic mechanism An apparatus for manufacturing a cross flow fan, comprising: a mechanism and a rotating mechanism for rotating the positioned fan component, wherein the ultrasonic welding is performed while rotating the fan component at the same rotational speed without stopping.