JPH0343224A - Mold for fan molding - Google Patents

Abstract

PURPOSE:To open respective blade insert dies outwardly by releasing an undercut of the blade of a product and integrally forming a resin fan easily by rotating a rotating cam plate and moving a working pin along an opening section of a guide plate in accordance with rotation of the rotating cam plate. CONSTITUTION:Hydraulic cylinders 71 and 72 are operated and an engaging tool 70 fit into a boss opening 69 is moved from one end of the boss opening 69 to the other end and respective cam plates 62 are rotated by the given angle. Working pins 67 and 68 running through arc slits 65 and 62 of the rotating cam plate 62 are energized by a wall surface constituting the slits 65 and 66 following the rotation of the rotating cam plate 62 and moved outwardly along slides 51, 53, 63 and 64 of guide plates 50 and 61, and elliptical pins 55 and 56 of respective dies 37 are moved outwardly along slits 52 and 54 of the guide plate 56, moved in the direction slided by the given angle to the radius direction having the central axial line of a core mold 33 as the center and separated away respectively. The ends of respective plate insert dies 37 are drawn out of the plate section 11 of a fan 12 in a cavity to eliminate the cut.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a resin fan for use in, for example, a near conditioner, that is, a resin fan in which a large number of blades are connected by a plurality of ring-shaped reinforcing plates. This invention relates to a mold for molding a fan that integrally molds a fan.

[Conventional technology]

Conventionally, when manufacturing this type of resin fan, the first
As shown in Fig. 2 and Fig. They were glued together to form a resin fan.

[Problem to be solved by the invention]

Therefore, in the conventional resin fan described above, a process of gluing a plurality of fan units 3 to each other is required, which is time-consuming, and in addition, in order to connect the fan units 3, each fan unit 3 has to be glued together. It was difficult to align the axes with each other, which could have an adverse effect on the characteristics of the finished resin fan.

The present invention has been made in view of the above circumstances, and its purpose is to easily mold a resin fan in one piece and to smoothly mold a resin fan of good quality. Our objective is to provide molds for molding.

[Means to solve the problem]

In order to achieve the above object, claim 1 of the present invention provides a fan molding die 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 template is provided so as to be freely openable and closable, a movable receiving plate is provided on the movable template so as to be freely openable and closable, and a plurality of blade inserts for forming each of the blades are provided between the fixed template and the movable template. A plurality of split molds are provided on the outside of these blade inserts so as to be movable toward and away from each other in a plane perpendicular to the opening direction, and a plurality of split molds are attached to the blade inserts to fix the blade inserts in contact with each other. The insert opening/closing mechanism, which is releasably provided and which brings the blade inserts toward and away from each other, includes an operating pin that moves the blade inserts toward and away from each other, and a guide plate that supports and guides the operating pin by fitting it into a hole. A rotating cam plate for moving the operating pin along the hole, and a rotating mechanism for driving the rotating cam plate.

In addition to the above structure, the second aspect of the present invention is that the blade insert is provided with a guide pin that fits into the guide plate. It is characterized by a guide plate provided on each side.

[Effect]

In the fan molding mold of the present invention, the movable mold plate and the movable receiving plate are opened relative to the fixed mold plate, and the split mold is separated from the outside of the blade insert, and the rotating mechanism rotates the movable mold plate and the movable receiving plate. After rotating the cam plate and moving the operating pin along the hole of the guide plate according to the rotation of the rotating cam plate, each blade insert is opened outward and the undercut of the blade of the product is released. , open the movable receiving plate against the movable mold plate and take out the product.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 11.

1 to 9 show an embodiment of the fan molding die of the present invention. As shown in Figs. 10 and 11, the fan to be injection-molded using this fan molding mold has a plurality of ring-shaped reinforcing plates arranged facing each other at a predetermined distance of 1° from each other. Many feathers 11 between 10
are connected in parallel to the central axis of each reinforcing plate lO. These reinforcing plates IO are thicker toward the center and thinner toward the outside in the radial direction. Further, the blades ll adjacent to each other with the reinforcing plate lo in between are arranged on the same straight line. Furthermore, the inner and outer surfaces of the reinforcing plate IO and the inner and outer surfaces of the blades 11 are each formed in the same plane.

As shown in FIG. 1, the molding die for molding the fan 12 has a fixed mold plate 2o and a movable mold plate 21 arranged facing each other, and is attached to the tip of a support pin 22 fixed to the fixed mold plate 2o. The movable mold plate 21 is arranged so that it can approach and separate from the fixed mold plate 20 within the range until the stopper 23 engages with the stepped portion 24 of the through hole of the movable mold plate 21. There is. The fixed mold plate 2o is a fixed mounting plate 2
5, and in the center of this fixed mounting plate 25,
A locate ring 26 is attached. Further, in the central part of the locate ring 26, a conical injection port 27 is formed in the fixed mounting plate 25, and opposite to this injection port 27, the fixed mold plate 2° has a melting hole inside. The sprue bush 28, which serves as a passage for the resin, and this sprue bush 2
A cavity mold 29 arranged around the fan 8 and forming one end surface of the fan 12 is fitted therein.

The movable mold plate 21 has a first movable receiving plate 30 and a second movable receiving plate 31, and a guide pin 32 fixed to both supports ti30, 31 can be attached to and removed from a through hole formed in the movable mold [21]. It is provided so that it can be opened and closed freely when it is inserted into the. And the above 1. The second movable receiving plate 30.31 has the fan 12
A core mold 33 forming the reinforcing plate 10 and each inner surface of the blade 11
is fixed, and a cylindrical protrusion 34 that is fitted around the base end of the core mold 33 and forms the other end surface of the fan 12 is connected to a protrusion pin 35 fixed to the protrusion 34. With the sliding pin 36 passing through both movable receiving plates 30.31, it is arranged so as to be able to approach and move away from both movable receiving plates 30.31.

Further, a recess is formed in the tip surface of the core mold 33, and this recess is used as a runner, and the outer edge of the tip surface of the core mold 33 is used as a gate.

Between the fixed mold plate 20 and the movable mold plate 21 and outside of the A and A shapes 33, each blade 11 of the fan 12 is provided.
A large number of vane inserts 3 forming an outer surface, a convex curved surface, and a concave curved surface.
7 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, each of the blade inserts 37 is in contact with each other,
Dog-shaped notch 3 formed at their tip (inner end)
8 forms the outer surface and convex curved surface of the blade 11, and the tip surface 39 contacts the outer peripheral surface of the core mold 33,
A convex curved surface 40 at the tip portion forms a concave curved surface of the blade 11.

Further, the outer circumferential surface of each of the blade inserts 37 is a cylindrical surface, and a split mold 41 divided into four parts is arranged so as to be able to approach and move away from this cylindrical surface. A pair of connecting pins 43 (eight in total) are inserted into the mating surfaces 42 of these split molds 41, and are connected to each other at a predetermined distance. moreover,
A pair of opposing split molds 41 among the four split molds 41 each have a mounting member 45 attached to the tip of the piston rod of the hydraulic cylinder 44 attached to the fixed mold plate 20.
It is attached via 6. This hydraulic cylinder 44 is arranged so as to be inclined so as to move away from the axis of the core mold 33 as it goes toward the movable mold plate 21 side.

Furthermore, a pair of inclined pins 47 are inserted into each of the four split molds 41, and are attached to the fixed mold plate 20 at an angle that is the same as the mounting inclination angle of the hydraulic cylinder 44. Further, a large number of inclined plates 48 are bolted to the inclined surfaces formed on the outer periphery of the fixed mold plate 20 and the movable mold plate 21 at appropriate intervals.
Opposed to, each separate mold 41 has an inclined surface 4 whose inclination coincides with that of the other mold 41.
9 is formed.

Ring-shaped guide plates 50 are attached to both end surfaces of each of the blade inserts 37, respectively. These guide plates 5
0, as shown in FIG. 3, there are two annular rows of long holes 01+02 with large widths and two types of lengths, and long holes 53 and 54 with small widths and two types of lengths. , are arranged alternately at predetermined intervals. Two large and small round pins 55 and 56 protruding from both end faces of each of the blade inserts 37 are inserted into the respective elongated holes 52 and 54 of the guide plates 50.
is embedded in. In addition, a locking tool 58 having a convex cross section and fixed to the split mold 41 is fitted into an oval boss hole 57 formed at the outer edge of both guide plates 50. Each split mold 41 is connected to the guide plate 50 so as to be spaced apart from each other by a predetermined distance. Further, the fixed mold plate 20. A guide plate 61 and a rotary cam plate 62 are disposed in the stepped recesses 59 and 60 formed in the movable mold plate 21, respectively. This guide plate 61 has the elongated holes 51 of the guide TFI50.
Elongated holes 63 and 64 having a convex cross-section and two different widths, large and small, are formed opposite to the guide plate 53, and the guide plate 61 is fixed to the recess 59, 60 of each template 20, 21. .

The rotating cam plate 62 includes the guide 1f61.
As shown in FIG. 5, arc-shaped long holes 65 and 66 of two types, large and small, are formed opposite the long holes 63 and 64.
Two types of operating pins 67 and 68 with different diameters whose base ends are fixed by the guide plate 61 are inserted into the elongated holes 63 and 64 of the guide plate 61, the elongated holes 65 and 66 of the rotary cam plate 62, and the elongated holes 65 and 68 of the guide plate. 50, and is slidably fitted into both end surfaces of each blade insert 37. Therefore, each blade insert 37 has a large diameter elliptical pin 5 on both end surfaces.
5 and a small diameter operating pin 68 or a small diameter oval pin 56
and large-diameter operating pins 67 are inserted alternately into one set. Furthermore, the oval boss holes 69 formed on the outer edge of each of the rotary cam plates 62 are provided with convex-shaped engagement holes attached to the recesses 59 and 60 of the fixed template 20 and the movable template 21. A tool 70 is fitted, and the tips of piston rods of hydraulic cylinders 71 and 72 attached to the fixed mold plate 20 and the movable mold plate 21 are connected to the outer edge of the rotary cam plate 62, respectively. There is. Then, the circumferential rotating cam plate 62 is operated by both the hydraulic cylinders 71 and 72.
However, the recesses 59 and 60 of the fixed mold plate 20 and the movable mold plate 21
It can rotate within a range limited by the length of the boss hole 69.

Next, a case where the resin fan 12 shown in FIGS. 1O and 11 is injection molded using the fan molding mold configured as described above will be described with reference to FIG. 9.

Note that since the injection molding machine is a horizontal one, the axis of the core mold 33 (sprue bush 28) is arranged in the horizontal direction in FIG. 1, and in FIGS. 2 to 4, The left side of the drawing is placed above and the right side of the drawing is placed below.

First, in the mold closed state as shown in Fig. 1, when a predetermined time is reached by the timer, hydraulic oil is supplied to the hydraulic cylinder 44, and the piston rod is urged forward (Fig. 9). (immediately before action item 1)
. At this time, the piston rod of this hydraulic cylinder 44 is
Each split mold 41 moves forward slightly due to the gap between the fixture 45 attached to its tip and the mounting member 46, but each split mold 41
Since it is pressed down by the tilting plate 48 attached to the 0.21 inch, it will not open. Then, as shown in operation items 1 to 2 in Fig. 9, the mold opening/closing mechanism of the injection molding machine (
(not shown), the movable template 21 and the first . The second movable receiving plate 30.31 opens a predetermined distance. Along with this, each split mold 4 that had been pressed down by the inclined plate 48 until now
1 becomes free to move, the piston rod of the hydraulic cylinder 44 moves forward, and as a result, each split mold 41 moves obliquely downward according to the inclination of the inclined pin 47, and both the fixed mold plate 20 and the movable mold plate 21 move forward. As it moves away from each other, each split mold 4
1 is opened while being connected by a connecting pin 43. In this case, the guide plate 50 and split die 41 attached to both end faces of the blade insert 37 are connected to the boss hole 57 and the locking tool 5.
8, so that the split mold 4 can be separated by a predetermined distance.
1, it moves away from both the fixed mold plate 20 and the movable mold plate 21. As a result, the actuating pins 67 and 68 supported by the respective guide plates 61 of the fixed mold plate 20 and the movable mold plate 21 are pulled out by a predetermined distance from the mounting holes formed in the blade insert 37, respectively. This distance is
1 and the fixed mold plate 20 is slightly larger than the 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 closer to the operating pins of the movable mold plate 21. 6
It is pulled out a little more than 7.68.

Next, in this state, as shown in action item 3 in FIG. 9, the hydraulic cylinders 71 and 72 are operated to move each piston rod forward. As a result, the engaging tool 70 fitted into the boss hole 69 moves from one end of the boss hole 69 to the other end, thereby rotating each rotary cam plate 62 connected to the tip of the piston rod by a predetermined angle. Therefore, as the rotating cam plate 62 rotates, the operating pins 67 and 68 inserted through the arc-shaped long holes 65 and 66 of the temporary rotating cam plate 62,
Since each blade insert 37 moves outward along the long holes 51.53°63.64 of the guide plate 50.61 by being urged by the walls forming the long holes 65 and 66, each blade insert 37 55 and 56 move outward along the elongated holes 52 and 54 of the guide plate 50, and at the same time move in a direction shifted by a predetermined angle with respect to the radial direction centered on the central axis of the core mold 33,
move away from each other. As a result, the molded product inside the cavity (
The tip of each blade insert 37 is completely pulled out from the blade 11 portion of the fan 12, and the undercut is eliminated.

In this case, the operating pin 6 that acts to open each blade insert 37
7.68 are elongated holes 51.53, 63.64 of the guide plate 50.61 arranged on both sides of the rotating cam plate 62, respectively.
Since it is supported and guided by the operating pin 67.68
This prevents bending and allows smooth operation. Further, since the actuating pins 67, 68 and the elliptical pins 55, 56 are used, even if the blade inserts 37 are separated from each other, each blade insert 37 can be operated by the guide 1, 50, 61 and the rotating pin 55, 56. Operating pins 67, 68 supported by respective elongated holes 51, 53, 63, 64, 65° 66 of the cam plate 62, and oval pins 55, 56 supported by elongated holes 52, 54 of the guide plate 50.
It is securely supported and will not sway.

Subsequently, after the blade insert 37 is pulled outward and the undercut is eliminated, the mold opening/closing mechanism of the molding machine moves the first. The second movable receiving plate 30.31, the core mold 33, and the protruding tool 34 are fixed to the mold plate 2.
Pull it further away from the 0 side. At this time, the movable template 21 is fixed by the stepped portion 24 of its through hole being engaged with the stopper 23 at the tip of the support pin 22, so that the movable template 21 is fixed to the 1st and second movable retainers 30 and 31. The guided pin 32 is pulled out from the movable mold plate 21, and the first guide pin 32 is pulled out from the movable mold plate 21. Second movable receiving plate 30
, 31, the core mold 33 to which the protruding tool 34 and the molded product are attached is separated from the movable mold plate 21.

Then, as shown in FIGS. 7 and 8, a fixed mold plate 20,
The movable template 21 and the first. When the second movable support 30.31, the core mold 33, and the protruding tool 34 are completely separated and separated by a predetermined distance (see operation item 5 in FIG. 9), the ninth
As shown in operation items 6 to 7 in the figure, the first. The protruding tool 34 is separated from the second movable receiving plate 30, 31, and the molded product (fan) 12 remaining on the outer periphery of the core mold 33 is protruded with the tip of the protruding tool 34, and then taken out. As a result, the molding of the molded product is completed, while the protruding tool 34 is returned to the first movable receiving plate 30 side.

Next, proceeding to the mold closing process, first, operation items 8 to 8 in Fig. 9 are performed.
As shown in 9, the first. After returning the second movable receiving plate 30, 31 until it touches the movable mold plate 21, operation item 10 in FIG.
As shown in FIG. 7, by retracting the piston rods of the hydraulic cylinders 71 and 72, the temporary rotary cam 62 is rotated in the opposite direction to the direction when the mold is opened, thereby causing the actuating pin 67 to rotate.
．． Pull 68 back inward. As a result, each vane insert 37 moves inward as the oval pins 55, 56 are returned inward along the long holes 52, 54, and comes into close contact with each vane insert 37, while The tip surface 39 of the vane 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 and 12 in FIG. By bringing the second movable receiving plates 30, 31 and the core mold 33 close to the fixed mold plate 20 side, the gap between each split mold 41 is closed, and the inner peripheral surface of the 6-split mold 41 or the outer peripheral surface of each blade insert 37 is closed. The inclined plate 48 attached to the outer edge of each frame plate 20, 21 comes into close contact with the inclined surface 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 thick at the center and becomes thinner toward the outside in the radial direction, and adjacent blades 11 with the reinforcing tliE10 in between 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. This eliminates the need for work processes such as gluing individual fans together.

Further, the fan 12 is used by rotating around its axis as in the conventional case, and gas moving along the axis within the fan 12 flows outward from between the blades 11. 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, the gas flowing inside the fan 12 along the axis is not obstructed by the inner surface of the reinforcing plate IO. This causes turbulence in the flow, and since the adjacent blades separated by the reinforcing plate are arranged in a straight line, the gas flowing out from between the blades 11 as the fan 12 rotates is synchronized. - Wind can be sent in the same direction, reducing flow resistance.

〔Effect of the invention〕

As explained above, the fan molding mold of the present invention is a fan molding mold 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 template is provided so as to be freely openable and closable, a movable receiving plate is provided on the movable template so as to be freely openable and closable, and a plurality of blade inserts for forming each of the blades are provided between the fixed template and the movable template. A plurality of split molds are provided on the outside of these blade inserts so as to be movable toward and away from each other in a plane perpendicular to the opening direction, and a plurality of split molds are attached to the blade inserts to fix the blade inserts in contact with each other. The insert opening/closing mechanism, which is releasably provided and which brings the blade inserts toward and away from each other, includes an operating pin that moves the blade inserts toward and away from each other, and a guide plate that supports and guides the operating pin by fitting it into a hole. It consists of a rotating cam plate that moves the operating pin along the hole, and a rotating mechanism that drives this rotating cam plate, so the movable template and movable receiving plate are connected to the fixed template. At the same time as opening, with the split mold separated from the outside of the vane insert, the rotating mechanism rotates the rotating cam plate, and as the rotating cam plate rotates, the operating pin moves along the hole in the guide plate. After opening each blade insert outward to release the undercut of the product's blades, open the movable receiving plate against the movable mold plate and take out the product. It can be easily molded into one piece, eliminates the need for adhesive work that was previously required, and when the molded resin fan is rotated, there is no turbulence in the flow, reducing resistance and allowing it to rotate. This has excellent effects in that it is possible to smoothly obtain a product of good quality, such as by suppressing the runout associated with the process.

Further, in claim 2 of the present invention, since the blade insert is provided with a guide pin that fits into the guide plate, when the blade insert is opened, the blade insert is supported by the guide pin and the operating pin. By doing so, each blade insert does not swing, and opening and closing operations can be performed smoothly.

Furthermore, since guide plates are provided on both sides of the rotating cam plate, when the rotating cam plate is rotated and the operating pin is moved, the operating pin is supported by the two guide plates, and the operating pin is moved. The blade insert can be opened and closed reliably.

[Brief explanation of drawings]

1 to 9 show an embodiment of the present invention,
Figure 1 is a sectional view, Figure 2 is a plan view of the fixed mold plate, Figure 3 is an explanatory diagram of the vane insert and the split mold part seen from the movable mold plate side, and Figure 4
The figure is a plan view of the movable mold plate, Figure 5 is an explanatory diagram explaining the positions of the long holes on the rotary cam plate, Figure 6 is an explanatory diagram when the guide plate and rotary cam plate are overlapped, and Figure 7 is an explanatory diagram of the mold plate. 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 the mold is opened, and Fig. 9 is an explanatory diagram showing the operation of each part of the mold. , FIG. 10 and FIG. 11 show an example of a fan injection molded using the injection mold of the present invention, FIG. 10 is a front view, FIG. 11 is a sectional view, and FIGS. 12 and 13.
The figures show a conventional resin fan, with FIG. 12 being a front view and FIG. 13 being a sectional view. DESCRIPTION OF SYMBOLS 10... Reinforcement plate, 11... Blade, 12... Fan, 20... Fixed template, 21... Movable template, 30...
・First movable receiving plate, 31... Second movable receiving plate, 37...
Feather insert, 41... split mold, 50... guide plate, 51
, 52, 53.54... Long hole, 55.56... Oval pin, 61... Guide plate, 62... Rotating cam plate, 6
3.64, 65.66... Long hole, 67.68... Operating pin, 71.72... Hydraulic cylinder (insert opening/closing mechanism).

Claims (1)

[Claims] 1) In a fan molding mold 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 template is provided on a fixed template so that it can be opened and closed. , a movable receiving plate is provided on the movable mold plate so as to be freely openable and closable, and a plurality of blade inserts forming each of the 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 are provided on the outside of these blade inserts for fixing the respective blade inserts in contact with each other so as to be able to move toward and away from each other; The insert opening/closing mechanism that brings the blade inserts into contact with each other and separates them from each other includes an operating pin that moves the blade inserts toward and away from each other, a guide plate that supports and guides the operating pin by fitting it into a hole, and a guide plate that supports and guides the operating pin into the hole. 1. A mold for forming a fan, comprising: a rotating cam plate that is moved along a section; and a rotating mechanism that drives the rotating cam plate. 2) The fan molding die according to claim 1, wherein the blade insert is provided with a guide pin that fits into the guide plate. 3) The mold for forming a fan according to claim 1 or 2, wherein guide plates are provided on both sides of the rotary cam plate.