JP2658409B2 - Fan molding method and fan molding die - Google Patents

Description

The present invention relates to, for example, a resin fan for use in an air conditioner, that is, a resin fan in which a number of blades are connected by a plurality of ring-shaped reinforcing plates. The present invention relates to a fan molding method and a mold for molding a fan integrally.

[Conventional technology]

Conventionally, when manufacturing this type of resin fan,
As shown in FIGS. 12 and 13, a plurality of fan units 3 each having a plurality of blades 2 formed on one end surface of a ring-shaped reinforcing plate 1 are vertically arranged, and the adjacent reinforcing plate 1 and the tip of the blade 2 are arranged. And a resin fan.

[Problems to be solved by the invention]

Therefore, in the above-mentioned conventional resin fan, a step of bonding a plurality of fan units 3 is required, which requires a lot of work, and in order to connect the fan units 3, It is difficult to make the axes coincide with each other, which may adversely affect the characteristics of the completed resin fan.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fan capable of easily forming a resin fan integrally and smoothly forming a high-quality resin fan. An object of the present invention is to provide a mold for fan molding.

[Means for solving the problem]

In order to achieve the above object, claim 1 of the present invention is a fan molding method for integrally molding a resin fan in which a large number of blades are connected by a plurality of ring-shaped reinforcing plates, A movable mold plate is provided so as to be openable and closable, and a movable receiving plate is provided on the movable mold plate so as to be openable and closable. On the other hand, a plurality of blade inserts forming the respective blades are formed between the fixed mold plate and the movable mold plate. A plurality of split dies, which are provided so as to be able to freely contact and separate from each other in a plane perpendicular to the opening direction and are fixed outside the blade inserts in a state where they are in contact with each other, are connected to the blade inserts. Along with being provided detachably, first, the movable mold plate is opened with respect to the fixed mold plate, the split mold is separated outside the blade insert, and then the blade inserts are separated from each other. Open the movable receiving plate from the movable mold plate and take out the resin fan Than it is.

A second aspect of the present invention is a fan molding die for integrally molding a resin fan having a large number of blades connected by a plurality of ring-shaped reinforcing plates, wherein a movable mold plate is provided on a fixed mold plate. A movable receiving plate is provided on the movable mold plate so as to be openable and closable, and a plurality of blade inserts forming the respective blades are orthogonally arranged in the mold opening direction between the fixed mold plate and the movable mold plate. A plurality of split dies are provided so as to be able to freely contact with and separate from each other in a plane to be fixed, and are fixed to the blade insert so as to be in contact with each other outside the blade inserts. Together, the movable mold plate and the movable receiving plate are opened with respect to the fixed mold plate, and then the mold opening and closing mechanism that opens the movable receiving plate with respect to the movable mold plate, and the movable mold plate and the fixed mold plate A split mold driving mechanism for bringing the split mold into and out of contact with the blade insert at the stage of opening, Type is obtained by including a nested closing mechanism and away from each other the respective blade insert in a state of being spaced apart from said blade insert.

[Action]

In the fan molding method, the movable mold plate is opened with respect to the fixed mold plate, the split mold is separated outside the blade insert, the blade inserts are separated from each other, and further movable from the movable mold plate. Open the receiving plate and take out the resin fan attached to the movable receiving plate.

In the mold for molding a fan of the present invention, the mold opening / closing mechanism opens the fixed mold plate and the movable mold plate, and the split mold driving mechanism separates the split mold outside the blade insert.
Next, the blade inserts are separated from each other by the insert opening / closing mechanism, and further, the movable receiving plate is separated from the movable mold plate, and the molded product attached to the movable receiving plate is taken out.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 11.

FIGS. 1 to 9 show an embodiment of a fan molding die according to the present invention. As shown in FIGS. 10 and 11, a fan to be injection-molded with this fan molding die has a plurality of ring-shaped reinforcing plates 10 arranged opposite to each other at a predetermined distance from each other. In addition, a large number of blades 11 are connected to each other by being extended parallel to the central axis of each reinforcing plate 10. And these reinforcing plates 10 are thick on the center side,
It is formed thinner outward in the radial direction. The blades 11 adjacent to each other with the reinforcement 10 interposed therebetween are arranged on the same straight line. Further, the inner and outer surfaces of the reinforcing plate 10 and the inner and outer surfaces of the blade 11 are formed in the same plane.

As shown in FIG. 1, a molding die for molding the fan 12 has a fixed mold plate 20 and a movable mold plate 21 opposed to each other, and is attached to a tip of a support pin 22 fixed to the fixed mold plate 20. The movable mold plate 21 is disposed so as to be able to approach and separate from the fixed mold plate 20 within a range until the stopper 23 is locked to the step portion 24 of the through hole of the movable mold plate 21. I have. And
The fixed die plate 20 is fixed to a fixed mounting plate 25, and a locate ring 26 is mounted at the center of the fixed mounting plate 25. Further, a conical injection port 27 is formed in the fixed mounting plate 25 at the center of the locating ring 26, and the inside of the fixed mold plate 20 is formed of a molten resin facing the injection port 27. A sprue bush 28 serving as a passage, and a mold 29 disposed around the sprue bush 28 and forming one end surface of the fan 12 are fitted.

The movable plate 21 includes a first movable receiving plate 30 and a second movable receiving plate.
31 and, in a state where the guide pins 32 fixed to both the receiving plates 30 and 31 are detachably inserted into the through holes formed in the movable mold plate 21,
It is provided to open and close freely. A core mold 33 forming the inner surfaces of the reinforcing plate 10 and the blade 11 of the fan 12 is fixed to the first and second movable receiving plates 30 and 31, respectively. And a cylindrical projecting member 34 which forms the other end face of the fan 12 is fitted around the projecting pin 35 and the sliding pin 36 fixed to the projecting member 34 with the movable receiving plates 30, 3.
In a state penetrating through 1, the movable receiving plates 30 and 31 are arranged so as to approach and separate from the movable receiving plates 30 and 31 freely. Further, a concave portion is formed on the distal end surface of the core mold 33, and the concave portion serves as a runner, and the outer edge of the distal end surface of the core mold 33 serves as a gate.

Between the fixed mold plate 20 and the movable mold plate 21, and outside the core mold 33, the outer surface of each blade 11 of the fan 12 and a number of blade inserts forming a convex curved surface and a concave curved surface. 37 are arranged radially in a plane perpendicular to the central axis of the core mold 33 so as to be able to approach and separate from each other. Then, while the blade inserts 37 are in contact with each other, the V-shaped notch 38 formed at the tip (inner end) thereof forms the outer surface and the convex curved surface of the blade 11, and 39 contacts the outer peripheral surface of the core mold 33, and the convex curved surface 40 at the tip forms a concave curved surface of the blade 11.

The outer peripheral surface of each of the blade inserts 37 is a cylindrical surface, and a split mold 41 divided into four is disposed so as to approach and separate from the cylindrical surface. The mating surfaces 42 of these split dies 41 are paired with each other (a total of 8
Book) is inserted. Further, a pair of split molds 41 facing each other among the four split molds 41 are respectively provided with:
A mounting member 45 at the tip of the piston rod of the hydraulic cylinder 44 mounted on the fixed die plate 20 is mounted via a mounting member 46. The hydraulic cylinder 44 is arranged so as to be inclined away from the axis of the core mold 33 toward the movable mold plate 21.

Still further, each of the four split dies 41 is provided with a pair of inclined pins 47 which are attached to the fixed mold plate 20 at the same inclination angle as the attachment inclination angle of the hydraulic cylinder 44, respectively. In addition, a number of inclined plates 48 are bolted to the inclined surfaces formed on the outer peripheral portions of the fixed mold plate 20 and the movable mold plate 21 at appropriate intervals. The split mold 41 has an inclined surface 49 having the same inclination.

Ring-shaped guide plates 50 are attached to both end faces of each of the blade inserts 37, respectively. As shown in FIG. 3, these guide plates 50 have two rows of long holes 51 and 52 having a large width and two kinds of lengths, and a small width and two kinds of long holes. The holes 53 and 54 are formed alternately at predetermined intervals. And each of the above blades 37
The two large and small elliptical pins 55 and 56 projecting from both end surfaces of the guide plate 50 are fitted into the long holes 52 and 54 of both the guide plates 50. An oval boss hole 57 formed at the outer edge of each of the guide plates 50 has a locking tool 58 fixed to the split mold 41 and having a convex cross section.
Are fitted, so that both guide plates 50
Each split mold 41 is connected to be separated by a predetermined distance. Further, a guide plate 61 and a rotary cam plate 62 are disposed in the stepped recesses 59 and 60 formed in the fixed mold plate 20 and the movable mold plate 21 in opposition to the guide plates 50, respectively. Have been. The guide plate 61 is formed with two types of long holes 63 and 64 having a convex cross section and large and small widths, facing the long holes 51 and 53 of the guide plate 50. The mold plates 20 and 21 are fixed to recesses 59 and 60, respectively. Then, the rotating cam plate 62
5, two large and small arc-shaped long holes 65 and 66 are formed opposite to the long holes 63 and 64 of the guide plate 61 as shown in FIG. Two types of operating pins 67 and 68 having different diameters having fixed ends are provided with long holes 63 and 64 of a guide plate 61, long holes 65 and 66 of a rotary cam plate 62, and a guide plate 50.
The blades 37 are slidably fitted through the long holes 51 and 53 on both end faces of the blade insert 37. Therefore, the large-diameter elliptical pin 55 and the small-diameter operating pin 6 are provided on both end faces of each blade insert 37, respectively.
8, or a small-diameter elliptical pin 56 and a large-diameter operating pin 67 are alternately inserted as a set. Furthermore, an oval boss hole formed in the outer edge of each rotary cam plate 62
On 69, an engaging member 70 having a convex cross section attached to the concave portions 59 and 60 of the fixed mold plate 20 and the movable mold plate 21 is fitted.
Hydraulic cylinders 71 and 72 attached to the fixed mold plate 20 and the movable mold plate 21, respectively, are provided on the outer edge of the rotary cam plate 62.
Of the piston rod are connected. The two rotary cam plates 62 are formed by the two hydraulic cylinders 71 and 72.
In each recess 59, 60 of the fixed mold plate 20 and the movable mold plate 21,
It can rotate within a range restricted by the length of the boss hole 69.

Next, a case where the resin fan 12 shown in FIGS. 10 and 11 is injection-molded using the fan molding die configured as described above will be described with reference to FIG. In addition, since the injection molding machine is of a horizontal type, the axis of the core mold 33 (the sprue bushing 28) is arranged in the horizontal direction in FIG. 1 and the drawing is shown in FIGS. The left side is located above and the right side of the drawing is located below.

First, in a mold closed state as shown in FIG. 1, when a predetermined time comes by a timer, a hydraulic oil is supplied to the hydraulic cylinder 44 so that the piston rod is urged forward (FIG. 9). Immediately before operation item 1). At this time, the piston rod of the hydraulic cylinder 44 slightly advances due to the gap between the mounting member 45 and the mounting member 46 mounted on the tip of the hydraulic cylinder 44.
Since it is held down by the inclined plate 48 attached to 1, it does not open. Then, as shown in operation items 1 and 2 in FIG. 9, the movable mold plate 21 and the first and second movable receiving plates 30 and 31 are moved by a mold opening / closing mechanism (not shown) of the injection molding machine.
Opens a predetermined distance. Along with this, the movement of each split mold 41 pressed by the above-mentioned inclined plate 48 becomes free, so that the piston rod of the hydraulic cylinder 44 moves forward, thereby causing each split mold 41 to move with the tendency pin. It moves obliquely downward according to the inclination of 47, moves away from both the fixed mold plate 20 and the movable mold plate 21, and opens with the split dies 41 connected by the connection pins 43. In this case, the blade insert 37 has a guide plate 50 and split mold 41 attached to both end surfaces thereof, and a boss hole 57.
And the stopper 58 are connected so as to be separated by a predetermined distance, so that the fixed mold plate 20 and the movable mold plate 21 follow the movement of the split mold 41.
Go away from both sides. As a result, the operating pins supported by the respective guide plates 61 of the fixed mold plate 20 and the movable mold plate 21
Each of the blades 67 and 68 is pulled out from the mounting hole formed in the blade insert 37 by a predetermined distance. Since the separation distance between the split mold 41 and the fixed mold plate 20 is slightly larger than the separation distance between the split mold 41 and the movable mold plate 21, the operating pins 67 and 68 of the fixed mold plate 20 are movable. The operation pins 67 and 68 on the plate 21 are slightly pulled out slightly more.

Next, in this state, the hydraulic cylinders 71 and 72 are operated to advance each piston rod as shown in the operation item 3 in FIG. As a result, the engaging member 70 fitted in the boss hole 69 moves from one end of the boss hole 69 to the other end, and thereby each of the rotary cam plates 62 connected to the tip of the piston rod.
Rotates a predetermined angle. For this reason, the operating pins 67, 68 in a state where the arc-shaped long holes 65, 66 of the rotary cam plate 62 are inserted therethrough are rotated by the rotation of the rotary cam plate 62, so that the operating pins 67, 68 are formed by the wall surfaces forming the long holes 65, 66. Energized, guide plates 50, 61 long holes 51, 53, 63, 64
Move outward along the center axis of the core mold 33 as the elliptical pins 55, 56 move outward along the long holes 52, 54 of the guide plate 50. Move in a direction deviated by a predetermined angle with respect to the radial direction around the center, and move away from each other. As a result, the molded product (fan) in the cavity 12
The tip of each blade insert 37 is completely pulled out from the blade 11 portion, and the undercut is eliminated.

In this case, the operating pins 6 that open each blade insert 37
7, 68 are supported and guided by long holes 51, 53, 63, 64 of guide plates 50, 61 arranged on both sides of the rotary cam plate 62, respectively, so that the operating pins 67, 68 are prevented from bending. It works smoothly. Also, the operating pins 67 and 68 and the elliptical pins 55 and 56
Therefore, even if the respective blade inserts 37 are separated from each other, the respective blade inserts 37 are not longer than the guide plates 50 and 61 and the respective rotary holes 51, 53, 63, and 64 of the rotary cam plate 62. It is reliably supported by the operating pins 67 and 68 supported by 65 and 66 and the elliptical pins 55 and 56 supported by the long holes 52 and 54 of the guide plate 50 and does not swing.

Subsequently, after the blade insert 37 is pulled out and the undercut is eliminated, as shown in the operation item 4 in FIG. 9, the first and second movable receiving members are opened and closed by the mold opening and closing mechanism of the molding machine. Board
The 30, 31, the core mold 33, and the projecting tool 34 are further separated from the fixed mold plate 20 side. At this time, the movable mold plate 21 is
The guide pin 32 fixed to the first and second movable receiving plates 30 and 31 is pulled out from the movable mold plate 21 because the lock pin 24 is fixed to the stopper 23 at the tip of the support pin 22. First
The core mold 33 to which the second movable receiving plates 30 and 31, the protruding tool 34, and the molded product adhere are separated from the movable mold plate 21.

Then, as shown in FIG. 7 and FIG.
In a state where the movable mold plate 21, the first and second movable receiving plates 30, 31, the core mold 33, and the projecting tool 34 are completely separated from each other and are separated by a predetermined distance (see operation item 5 in FIG. 9), As shown in operation items 6 to 7 in FIG. 9, the protruding tool 34 is separated from the first and second movable receiving plates 30 and 31, and the molded product left on the outer periphery of the core mold 33 at the tip of the protruding tool 34. (Fan) After sticking out 12,
Take this out. As a result, while the mold release of the molded product is completed, the protruding tool 34 is returned to the first movable receiving plate 30 side.

Next, the process proceeds to a mold closing process.
As shown in FIGS. 9 to 9, the first and second movable receiving plates 30 and 31 are
Then, as shown in the operation item 10 in FIG. 9, the rotary cam plate 62 is rotated in the direction opposite to the direction when the mold is opened by retracting the piston rods of the hydraulic cylinders 71 and 72 as shown in the operation item 10 in FIG. Thereby, the operating pins 67 and 68 are pulled inward. As a result, each blade insert 37 moves inward while the elliptical pins 55, 56 are returned inward along the elongated holes 52, 54, while each blade insert 37 comes into close contact with each other, The tip surface 39 of the blade insert 37 is in close contact with the outer peripheral surface of the core mold 33.

In this state, as shown in operation items 11 to 12 in FIG. 9, the piston rod of the hydraulic cylinder 44 is retracted, and the movable mold plate 21, the first and second movable receiving plates 30, 31, By bringing the core mold 33 closer to the fixed mold plate 20 side, the space between the split molds 41 is closed, the inner peripheral surface of each split mold 41 is in close contact with the outer peripheral surface of each blade insert 37, and The inclined plates 48 attached to the outer edges of the 20, 21 are in close contact with the inclined surfaces 49 of the split mold 41, and the mold closing process is completed.

In the resin fan 12 molded as described above, the reinforcing plate 10 is formed to be thicker on the center side and thinner toward the outside in the radial direction, and the blades 11 adjacent to each other with the reinforcing plate 10 interposed therebetween. Are arranged on the same straight line, and the inner and outer surfaces of the reinforcing plate 10 and the inner and outer surfaces of the blades 11 are formed on the same plane, respectively. This eliminates the need for a work process such as a process of bonding fans alone.

The fan 12 is used by rotating around its axis, as in the prior art, and the gas moving along the axis inside the fan 12 flows out from between the blades 11 to the outside. In this case, since the inner surface of the reinforcing plate 10 and the inner surface of the blade 11 are formed on the same plane, gas flowing along the axis inside the fan 12 is obstructed by the inner surface of the reinforcing plate 10. There is no turbulence in the flow, and the blades 11 adjacent to each other across the reinforcing plate 10 are arranged in a straight line. , Can send the wind in the same direction at once,
Flow resistance can be reduced.

[Effects of the Invention] As described above, claim 1 of the present invention is a fan molding method for integrally molding a resin fan in which a number of blades are connected by a plurality of ring-shaped reinforcing plates, A movable mold plate is provided on the mold plate so as to be openable and closable, and a movable receiving plate is provided on the movable mold plate so as to be openable and closable. On the other hand, a plurality of blades forming the respective blades between the fixed mold plate and the movable mold plate. A plurality of split dies are provided so as to be able to freely contact with and separate from each other in a plane orthogonal to the mold opening direction, and a plurality of split dies for fixing the respective blade inserts in contact with each other outside the blade inserts. First, the movable mold plate is opened with respect to the fixed mold plate, and the split mold is separated from the blade nests, and then the blade nests are separated from each other. Then, open the movable receiving plate from the movable mold plate and remove the resin fan. By taking out the resin fan, the resin fan can be smoothly and surely integrally formed, and the productivity and the quality of the product can be improved.

A second aspect of the present invention is a fan molding die for integrally molding a resin fan having a large number of blades connected by a plurality of ring-shaped reinforcing plates, wherein a movable mold plate is provided on a fixed mold plate. A movable receiving plate is provided on the movable mold plate so as to be openable and closable, and a plurality of blade inserts forming the respective blades are orthogonally arranged in the mold opening direction between the fixed mold plate and the movable mold plate. A plurality of split dies are provided so as to be able to freely contact with and separate from each other in a plane to be fixed, and are fixed to the blade insert so as to be in contact with each other outside the blade inserts. Together, the movable mold plate and the movable receiving plate are opened with respect to the fixed mold plate, and then the mold opening and closing mechanism that opens the movable receiving plate with respect to the movable mold plate, and the movable mold plate and the fixed mold plate A split mold driving mechanism for bringing the split mold into contact with and separating from the blade insert at the stage where the gap is opened; and Since the mold is provided with an insert opening / closing mechanism for bringing the blade inserts into and out of contact with each other in a state where the mold is separated from the blade inserts, the mold opening / closing mechanism allows the fixed mold plate and the movable mold plate to move between the fixed mold plate and the movable mold plate. Opening, the split mold drive mechanism separates the split mold to the outside of the blade insert, then the insert insert opening and closing mechanism separates the blade inserts, and further,
By pulling the movable receiving plate away from the movable mold plate and taking out the molded product adhering to the movable receiving plate, the resin fan can be easily molded integrally, and the troublesome bonding work that was conventionally required can be performed. Unnecessary, and when the resin fan is rotated, the flow is not disturbed, the resistance can be reduced, and the run-out caused by rotation can be suppressed, so that a good quality product can be formed smoothly. Can be.

[Brief description of the drawings]

1 to 9 show an embodiment of the present invention.
FIG. 1 is a sectional view, FIG. 2 is a plan view of a fixed mold plate, FIG. 3 is an explanatory view of a blade insert and a split mold portion viewed from the movable mold plate side, FIG.
FIG. 5 is a plan view of a movable mold plate, FIG. 5 is an explanatory diagram for explaining a slot position of a rotary cam plate, FIG. 6 is an explanatory diagram when a guide plate and a rotary cam plate are overlapped, and FIG. FIG. 8 is an explanatory diagram showing the positional relationship between the fixed mold plate and the movable mold plate after opening, FIG. 8 is an explanatory diagram showing the movable receiving plate side after opening the mold, and FIG. 9 is an operation explanatory diagram showing the operation of each part of the mold. FIGS. 10 and 11 show an example of a fan injection-molded by the injection mold of the present invention. FIG. 10 is a front view, FIG. 11 is a cross-sectional view, and FIGS. Shows a conventional resin fan, FIG. 12 is a front view, and FIG. 13 is a sectional view. 10 ... reinforcing plate, 11 ... blade, 12 ... fan, 20 ... fixed plate, 21 ... movable plate, 30 ... first movable receiving plate, 31 ... second movable receiving plate, 33 ... ... core type, 37 ... blade insert, 41 ... split type, 44 ... hydraulic cylinder (split type drive mechanism), 71, 72 ...
Hydraulic cylinder (nesting opening / closing mechanism).

Claims (2)

(57) [Claims] 1. A fan molding method for integrally molding a resin fan in which a number of blades are connected by a plurality of ring-shaped reinforcing plates, wherein a movable mold plate is provided on a fixed mold plate so as to be openable and closable. A movable receiving plate is provided on the plate so as to be openable and closable, while a plurality of blade inserts forming each of the blades are freely movable between the fixed mold plate and the movable mold plate in a plane orthogonal to the mold opening direction. And a plurality of split dies for fixing the respective blade inserts in contact with each other are provided on the outer side of the blade inserts so as to be able to freely contact and separate from the blade inserts. Open to the fixed mold plate, after separating the split mold to the outside of the blade insert, separate the blade inserts from each other, further open the movable receiving plate from the movable mold plate, A fan molding method characterized by taking out a resin fan. 2. A fan molding die for integrally molding a resin fan having a number of blades connected by a plurality of ring-shaped reinforcing plates, wherein a movable die plate is provided on a fixed die plate so as to be freely opened and closed.
A movable receiving plate is provided on the movable mold plate so as to be openable and closable, while a plurality of blade inserts forming the respective blades are arranged between the fixed mold plate and the movable mold plate in a plane orthogonal to the mold opening direction. A plurality of split molds which are provided so as to be able to freely contact and separate from each other, and which fix each of the blade inserts in contact with each other, are provided outside the blade inserts so as to be freely movable toward and away from the blade inserts. A plate and a movable receiving plate are opened with respect to the fixed mold plate, and then, a mold opening / closing mechanism that opens the movable receiving plate with respect to the movable mold plate, and at a stage where the space between the movable mold plate and the fixed mold plate is opened. A split mold driving mechanism for bringing the split mold into and out of contact with the blade insert, and an insert opening / closing mechanism for bringing the blade inserts into and out of contact with each other while the split mold is separated from the blade insert. A mold for molding a fan, characterized in that: