JP2000190373A - Cooling mold for molding blowing fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve molding efficiency, and execute molding operation in a state having no flaw by providing a positioning member for placing a blowing fan to be cooled and a receiving member to be attached in conformity with the regular shape position of a blade part of the blowing fan to be cooled and receiving the blade part. SOLUTION: A positioning member 11 for placing a blowing fan 12 to be cooled is provided at the central part of a base plate 1. Also, a plurality of block-shaped receiving members 13 having recessed parts being in conformity with the blade cross sectional faces of the blade part 12a are furnished at a tip end position of each blade part 12a of the fan 12 to be cooled around its periphery. In addition, a press member 10 is attached to arms 8a, 8b in a in conformity with a regular shape position of the blade part 12a of the fan 12 to be cooled that is placed on the positioning member 11. This constitution improves the molding efficiency, and also the blowing fan can be molded in a state having no flaw due to galling to be caused from the difference of a heat expansion coefficient between the mold and the plastics.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling fan for a blower, and more particularly to a cooling die for cooling a blower fan formed by an injection molding machine.

[0002]

2. Description of the Related Art Plastic blowers widely used in automobiles, railway vehicles, construction machines, and the like are molded by injection molding machines. In this case, the plastic melted in a mold provided in the injection molding machine is injected at a high pressure through a nozzle. The mold was left closed in the injection molding machine until the melted plastic cooled to a solid state and solidified. After the plastic had solidified, the mold was opened to remove the blown fan molded product.

[0003]

However, in the above-mentioned conventional method, it takes a long time for the plastic to harden, during which time the injection molding machine cannot perform the next injection molding, and the production efficiency of the blower fan is compared. It was low. Also, when the mold is opened and the molded product of the blower fan is taken out, so-called galling may occur due to a difference in expansion rate between the mold and the plastic, and the blower fan may be damaged at the time of removal.

The present invention has been made in view of the current state of molding of such a blower fan, and its object is to improve the molding efficiency of the blower fan in an injection molding machine and to prevent the blower fan from being damaged by galling. It is an object of the present invention to provide a cooling mold for forming a blower fan, which is formed in a state without any gap.

[0005]

In order to achieve the above object, the present invention comprises a substrate and a substantially central portion of the substrate,
A cooling fan for forming a blower fan, comprising: a positioning member on which a cooled blower fan is mounted; and a receiving member attached to the blade portion of the cooled blower fan so as to coincide with a regular shape position of the blade portion and receive the blade portion. And
A column vertically erected at a corner of the substrate, a support beam rotatably attached to the column, and extending horizontally to substantially the center of the substrate, and vertically moving at one end of the support beam. The cooling fan further includes an arm that is freely and radially extended, and a pressing member that is mounted in conformity with a regular shape position of a blade portion of the blower to be cooled. It is characterized by comprising a block having a concave portion corresponding to the airfoil section of the tip or a pin-shaped member for receiving the tip of the blade.

In the present invention, the blower fan to be cooled is taken out of the mold for forming the blower fan with the blade portion solidified and at least the root portion of the blade portion softened.
The cooled blower fan is placed on the positioning member, and is cooled while holding the blade member in the regular shape position by the receiving member and the pressing member. Further, the cooled blower fan, which has received the normal shape position of the already solidified blade portion by the receiving member and the pressing portion pressure, also solidifies the inside of the root portion of the blade portion while maintaining the normal shape, It is a finished product.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. 1 is a perspective view showing the configuration of one embodiment of the present invention, FIG. 2 is a front view of FIG. 1 on which a fan to be cooled is mounted, and FIG. 3 is a perspective view showing the configuration of another embodiment of the present invention. FIG. 4 is a front view of FIG. 3 on which a fan to be cooled is mounted.

As shown in these drawings, a column 2 is vertically provided at a corner of a substrate 1. A support beam 3 is rotatably attached to the column 2, and the support beam 3 is disposed so as to extend in the horizontal direction to a substantially central position of the substrate 1.

An air cylinder 4 is attached to the tip of the support beam 3, and a moving shaft 5 of the air cylinder 4 is provided.
Are arranged movably in the vertical direction, and a supporting disk 6 is fixed to an end of the moving shaft 5. Relay arms 7a and 7b are fixed to the support disk 6 so as to extend in the radial direction of the moving shaft 5, and arms 8a and 8b are fixed to ends of the relay arms 7a and 7b, respectively. The free ends of these arms 8a and 8b are respectively provided with pressing members 1
0 is attached.

On the other hand, a positioning member 11 on which a cooled blower fan 12 is mounted is provided at a central portion of the substrate 1, and a blade portion is provided at a distal end position of each blade portion 12 a of the cooled blower fan 12 at a peripheral portion. A plurality of block-shaped receiving members 13 (see FIGS. 1 and 2) having recesses corresponding to the airfoil cross-section of the airfoil or a plurality of pin-shaped receiving members 13 '(preferably vertically movable) (FIGS. 3 and 4). Reference).
In FIG. 1, only one block-shaped receiving member 13 is shown. The pressing member 10 is positioned on the arm 8 so as to coincide with the regular shape position of the blade portion 12a of the cooling fan 12 mounted on the positioning member 11.
a, 8b. Accordingly, as shown in FIG. 2, for example, one of the pressing members 10 attached to the arm 8a is fixed closer to the substrate 1 than the other.

In order to accurately and stably move the relay arm 7a in the vertical direction, a guide rod 1 is attached to the relay arm 7a.
The guide bar 13a is vertically erected within a guide hole 14 formed in the support beam 3.

In the present invention having such a configuration, the positioning member 1 is set in accordance with the type of the blower fan to be cooled.
1, the arms 8a and 8b, the receiving member 13 or 13 ', and the pressing member 10 are selected, and the selected positioning member 1 is selected.
1 is mounted on the substrate 1 such that the center of the substrate 1 is located at the center of the fan 12 to be cooled and the receiving member 13 or 13 'is located at the tip of each blade portion 12a of the fan 12 to be cooled. Have been. Also, the selected arms 8a, 8b are attached to the relay arms 7a, 7b, and the selected pressing members 10 are respectively attached to the arms 8a, 8b.
b.

Therefore, depending on the type of the blower fan, the pressing member 10 and the receiving member 13 or 13 ′ having a contact portion shape suitable for the regular shape of the blade portion 12 a of the cooled blower fan 12 are selected and mounted. ing. Further, the mutual distance between the pressing member 10 and the receiving member 13 or 13 'attached to the arms 8a and 8b and the height from the surface of the substrate 1 are selected in accordance with the type of the blower fan. For this reason, the positioning member 11 and the receiving member 13 or 13 ′ correctly position and hold the cooled blower fan 12, and the pressing member 10 and the receiving member 13 or 1 ′.
Numeral 3 'accurately holds a predetermined regular shape position of the blade portion 12a of the cooling fan 12.

Next, the operation of the present invention will be described. The molding of the blower fan is performed by an injection molding machine (not shown). The injection molding machine is provided with a mold for a blowing fan, and molten plastic is injected into the mold at a high pressure through a nozzle. And the molten plastic in the mold cools down, the thin blades of the blower fan solidify,
The mold is opened and the fan to be cooled is taken out with the root portion of the thick blade portion having only the surface solidified or the interior still softened.

The fan to be cooled is taken out of the mold by a robot (not shown). At this time, the support beam 3 rotates about the column 2 and the positioning member 11 of the substrate 1 is rotated.
It is set without any obstacles above.

The fan 12 to be cooled held by the robot has a central portion mounted on the positioning member 11 and a distal end of each blade portion 12a having a receiving member 13 or 1
3 '. When the placement of the cooled blower fan 12 on the positioning member 11 and the receiving member 13 or 13 'is completed, the support beam 3 rotates by a predetermined angle around the support column 2, and the center of the moving shaft 5 is cooled by the cooled blower. The center of the fan 12 is matched.

Next, the air cylinder 4 operates and the moving shaft 5
Is moved downward, the support disk 6 is lowered by a predetermined distance, the moving shaft 5 is stopped, and the support disk 6 stops at a predetermined distance from the cooled blower fan 12. In this stop position, the pressing member 10 holds the already solidified blade portion 12a of the cooled blower fan 12 together with the receiving member 13 or 13 'at the regular shape position. In this state, the cooling fan 12 placed on the positioning member 11 is cooled by air, and the inside of the fan 12 is softened.
The root portion of the dowel portion 12a is also solidified, and the molding of the blower fan is completed.

The cooled blower fan 12 is removed from the mold of the injection molding machine with the thin blade portion 12a solidified and the root portion of at least the thick blade portion 12a softened. For this reason, since the molded product of the blowing fan is taken out of the mold in a relatively short time, the next injection molding operation can be performed by the injection molding machine, and the molding of the blowing fan is performed efficiently.

Further, since the blower fan 12 to be cooled is taken out of the mold with at least the inside of the thick blade portion 12a being unsolidified, it is still softened as a whole, and the thermal expansion of the mold and the plastic is caused. No scuffing due to galling due to the difference in rate occurs.

The fan 12 to be cooled has a blade portion 12.
a is completely solidified, and at least the root portion of the blade portion 12a is softened.
3 or 13 'and the solidified blade portion 12
The normal shape position a is held and cooled by the receiving member 13 or 13 ′ and the pressing member 10. For this reason, there is no deformation in the cooling process, and the cooled blower fan 12 is cooled and formed into a regular shape.

The arms 8a, 8b, the pressing member 10,
By selectively exchanging the receiving member 13 or 13 ′ and the positioning member 11, it can be easily used for blowers of various shapes.

In the above-described embodiment, the moving shaft is vertically moved by the air cylinder. However, the present invention is not limited to this embodiment, and the moving shaft can be moved manually. In the illustrated embodiment, the pressing member holds the blade portion of the cooled blower fan from above, but in the present invention, the pressing member may hold the cooled blower fan from below. Further, in the present invention, it is possible to perform cooling molding by providing only the receiving member without providing the pressing member, but in this case, a weight for applying a pressing force to the positioning member 11 and the boss portion of the cooled blower fan is required.

[0023]

As described above in detail, according to the present invention, the molding efficiency of the blower fan is improved, and the blower fan is not damaged by galling due to the difference in the coefficient of thermal expansion between the mold and the plastic. It can be molded in a state.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of an embodiment of the present invention.

FIG. 2 is a front view of FIG. 1 on which a fan to be cooled is mounted.

FIG. 3 is a perspective view showing a configuration of another embodiment of the present invention.

FIG. 4 is a front view of FIG. 3 on which a blower to be cooled is mounted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 Prop 3 Support beam 4 Air cylinder 5 Moving shaft 6 Support disc 7a, 7b Relay arm 8a, 8b Arm 10 Pressing member 11 Positioning member 12 Cooling fan 12a Blade part 13, 13 'Receiving member 13a Guide rod 14 Guide hole

Claims (4)

[Claims] 1. A cooling device comprising: a substrate; a positioning member mounted substantially at the center of the substrate, on which a cooled blower fan is mounted; and a blade mounted to match a regular shape position of a blade portion of the cooled blower fan. And a receiving member for receiving a portion. 2. A support column vertically erected at a corner of the substrate, a support beam rotatably attached to the support column, and extending horizontally to a substantially central position of the substrate, and one end of the support beam. Further comprising: an arm that is vertically movable and is attached to extend in the radial direction, and a pressing member that is attached in conformity with a regular shape position of a blade portion of the cooled blower fan. Item 4. A cooling mold for blow fan molding according to Item 1. 3. The cooling fan according to claim 1, wherein the receiving member is formed of a block having a concave portion corresponding to an airfoil cross section of a tip portion of the blade portion. 4. The apparatus according to claim 1, wherein said receiving member comprises a pin-shaped member for receiving a tip portion of said blade portion.
Or the cooling mold for blow fan molding according to 2.