JPH0343223A - Mold for fan molding - Google Patents

Abstract

PURPOSE:To mold integrally and easily a resin made fan by opening a fixed template and a movable template, separating a split mold toward the outside of blade dies, separating each of the blade insert dies, also separating a movable support plate from the movable template and releasing a molded product adhering to the movable support plate. CONSTITUTION:A resin fan 12 is injection molded by using a mold for fan molding. A movable template 21 and a first and a second support plates 30 and 31 are opened by the given distance to move freely respective splits molds 41 pressed by a tilted plate 48, and a piston rod of a hydraulic cylinder 44 is moved forward, while respective split molds 41 are moved downward obliquely in compliance with the inclination of an inclined pin 47 and separated from both of a fixed template 20 and the movable template 21, and the space between respective split molds 41 are opened in the state of being connected with a connecting pin 43. As a guide plate 50 and the split mold 41 mounted on both end surfaces of a blade insert die 37 are connected with a boss hole 47 and a retaining tool 58 to be able to keep the given separation distance, the balde insert die is separated from both of the fixed template 20 and the movable template 21 following the movement of the split mold 41.

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 FIGS. 2 and 13, a plurality of individual fans 3 each having a large number of blades 2 formed on one end surface of a ring-shaped reinforcing plate L are arranged in multiple packages, and the tips of adjacent reinforcing plates I and blades 2 are 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 order to connect the fans 7, each fan unit 3 must be bonded together. It was difficult to align the three 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, 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 plate is provided so that it can be opened and closed, and a movable receiving plate is provided on this movable mold plate so that it can be opened and closed, and a plurality of blade inserts forming each of the blades are placed between the fixed mold plate and the movable mold plate in the mold opening direction. A plurality of split molds are provided so as to be movable toward and away from each other in a plane orthogonal to the vane inserts, and are fixed to the outside of these vane inserts in a state in which the vane inserts are in contact with each other. a mold opening/closing mechanism that opens the movable mold plate and the movable receiving plate with respect to the fixed mold plate, and then 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 drive mechanism that causes the split mold to approach and separate from the blade insert when the space between the split mold and the blade insert opens; and a split mold drive mechanism that causes the blade inserts to approach and separate from each other while the split mold is separated from the blade insert. It is equipped with a nested opening/closing mechanism.

[Effect]

In the fan molding mold of the present invention, the fixed mold plate and the movable mold plate are opened by the mold opening/closing mechanism, and the split mold is moved away from the vane insert by the split mold drive mechanism, and then,
The blade inserts are separated by the insert opening/closing mechanism, and the movable receiving plate is further separated from the movable mold plate to take out the molded product attached to the movable receiving plate.

〔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 FIG. 1O and FIG. 11, a fan injection-molded using this fan molding mold has a plurality of ring-shaped reinforcing plates IO arranged facing each other at a predetermined distance from each other, and a gap between these reinforcing plates 10. , many feathers! ■
are connected in parallel to the central axis of each reinforcing plate lO. These reinforcing plates IO are thicker on the center side and thinner toward the outer side in the radial direction. Further, the blades If adjacent to each other with the reinforcing plate IO in between are arranged on the same straight line. Furthermore, 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, the molding die for molding the fan 12 has a fixed mold plate 20 and a movable mold plate 21 arranged opposite each other, and is attached to the tip of a support bin 22 fixed to the fixed mold Fi, 20. The movable template 2 is moved within the range until the attached stopper 23 engages with the stepped portion 24 of the through hole of the movable template 21.
1 is arranged so that it can approach and move away from the fixed mold ¥ fi 20 - and the L foot fixed mold plate 20 is fixed to a fixed mounting plate 25, and the center of this fixed mounting plate 25 A locate ring 26 is attached to the. Also,
A conical injection port 27 is formed in the fixed mounting plate 25 at the center of the locate ring 26, and a conical injection port 27 is formed in the fixed mold plate 20 opposite to the parenthetical injection port 27. A sprue bush 28 and a cavity mold 29 disposed around the sprue bush 28 and forming one end surface of the fan 12 are fitted.

The above movable template 2! , the first movable receiving slope 30 and the second movable receiving plate 31 are connected to the guide pin 3 fixed to both receiving plates 30.31.
2 is a movable template 2! It is provided so that it can be opened and closed while being removably inserted into a through hole formed in the. And the above 1. A core mold 33 that forms the inner surfaces of the reinforcing plate 10 and the blades 11 of the fan 12 is fixed to the second movable receiving plate 30.31, and is fitted around the base end of the core mold 33. With a cylindrical protrusion 34 forming the other end face of the fan 12 passing through the protrusion pin 35 and sliding pin 36 fixed to the protrusion 34 through both movable receiving plates 30.31, It is arranged so as to be able to approach and move away from both movable retainers 30 and 31.

Further, a recessed portion is formed on the tip surface of the core mold 33, and these four portions serve as runners, and the outer edge portion of the tip 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, there are a large number of blade inserts forming the outer surface of each blade 11 of the fan 12, 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 move toward and away from each other. Then, while the blade inserts 37 are in contact with each other, the dogleg-shaped notches 38 formed at their tips (inner ends) form the outer surface and convex curved surface of the blade 11, and the tip surface 39 comes into contact with 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 II.

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 4I, 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. 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 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 rows of annular long holes 5], 52 with large widths and two types of lengths, and long holes 53 with small widths and two types of lengths. 54 are arranged alternately at predetermined intervals. Two large and small elliptical 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. Further, a locking tool 58 having a convex cross section fixed to the split mold 4I is fitted into an oblong boss hole 57 formed at the outer edge of both temporary guides 50, and thereby both In the guide Fi, 50, each split mold 4I is
They are connected so that they can be separated by a predetermined distance. Further, the fixed mold plate 20. Movable template 2
A guide E61 and a temporary rotary cam 62 are disposed in the step-shaped recesses 59 and 60 formed in 1, respectively.

This guide Ifi61 has the above-mentioned guide Vj 50 G.
') Opposing the long holes 51 and 53, long holes 63 and 64 having a convex cross section and two different widths, large and small, are formed;
Guide plates 61 are fixed to the four parts 59.60 of each template 20.21. In the rotary cam plate 62, arc-shaped long holes 65 and 66 of two sizes, large and small, are formed opposite to the long holes 63 and 64 of the guide plate 6I, as shown in FIG. , two types of operating pins 67 and 68 with different diameters whose base ends are fixed by the guide plate 6I are inserted into the long holes 63 and 64 of the guide plate 61 and the long hole 65 of the rotary cam plate 62.
, 66 and the elongated holes 51, 53 of the guide plate 50, and are slidably fitted into both end surfaces of each blade insert 37.

Therefore, on both end faces of each vane insert 37, a large-diameter elliptical pin 55 and a small-diameter operating pin 68, or a small-diameter elliptical pin 56 and a large-diameter operating pin 67 are arranged alternately. It is inserted. 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,
The outer edge of the rotary cam plate 62 is connected to the tips of piston rods of hydraulic cylinders 71 and 72 attached to the fixed mold plate 20 and the movable mold plate 21, respectively.

The two rotary cam plates 62 are moved by the two pressure cylinders 71 and 72 to the fixed mold plate 20 and the movable mold plate 2! It is possible to rotate within each of the recesses 59 and 60 within a range regulated 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 mold configured as described above will be described with reference to FIG. 9.

In addition, since the injection molding machine [is used], the axis of the core mold 33 (sublubuds 28) is arranged in the horizontal direction in Fig. 1, and in Figs. 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 Figure 9, the mold opening/closing mechanism of the injection molding machine (
(not shown), the movable mold plate 21 and the second and second movable receiving plates 30 and 31 are opened a predetermined distance. Along with this, each split mold 4 that had been pressed down by the inclined plate 48 until now
Since the movement of I becomes free, the piston rod of the hydraulic cylinder 44 moves forward, and as a result, each split mold 4K 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 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.
Fixed template 20 and movable template 2 follow the movement of template 1! moving away from both. As a result, the operating pins 67 and 68 supported by the guide plates 61 of the fixed mold plate 20 and the movable mold plate 2I are each pulled out a predetermined distance from the mounting hole formed in the blade insert 37. This distance is
! Since the distance between the fixed mold plate 20 and the split mold 41 is slightly larger than the distance between the split mold 41 and the movable mold plate 2I, the operating pins 67 and 68 of the fixed mold plate 20 are closer to the operating pins 6 of the movable mold plate 21.
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 'II, 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 rotary cam plate 62 rotates, the operating pins 67 and 68 inserted through the arc-shaped long holes 65 and 66 of the rotary cam plate 62 are moved by the wall surfaces forming the long holes 65 and 66. energized,
Since each vane insert 37 moves outward along the elongated holes 51, 53, 63.64 of the guide plate 50.61, its oval pin 55.56 follows the elongated hole 52, 54 of the guide plate 50. At the same time, they 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, and move away from each other. As a result, the tip of each blade insert 37 is completely pulled out from the blade 11 portion of the molded product (fan) 12 within the space, 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. In addition, since the operating 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 has an operating pin 67.68 supported by the guide plate 50.61 and each elongated hole 51, 53, 63, 64, 65°66 of the rotary cam plate 62, and the elongated hole 52 of the temporary guide 50. , 54 supported by oval pins 55.56
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 mold plate 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 mold plate 21 is fixed to the 1° second movable receiving plate 30, 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 2I (.

Then, as shown in FIGS. 7 and 8, a fixed mold plate 20,
The movable template 21 and the first. Second movable receiving plate 30.3! , the core mold 33 and the protruding tool 34 are completely separated and separated by a predetermined distance M (see operation item 5 in FIG. 9).
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, the operation item IO in FIG.
As shown in FIG. 3, by retracting the piston rods of the hydraulic cylinders 71 and 72, the rotary cam plate 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 blade insert 37 moves inward as the oval pins 55, 56 are returned inward along the elongated holes 52, 54, and each blade insert 37 comes into close contact with each other, 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 If to Step 2 in FIG. 9, the piston rod of the hydraulic cylinder 44 is retracted, and the movable mold plate 21 is moved back by the mold opening/closing mechanism. 1st. Second movable retainer 30, 31. By bringing the core mold 33 closer to the fixed mold plate 20 side, the space between each split mold 41 is closed, the inner peripheral surface of each split mold 4I is brought into close contact with the outer peripheral surface of each blade insert 37, and each mold plate The inclined plate 48 attached to the outer edge of the mold 20.21 comes into close contact with the inclined surface 49 of the split mold 4I, and the mold closing process is completed.

In the fan I2 made of 1M resin molded as described above, the reinforcing plate 10 is formed to be thick at the center and thinner toward the outside in the radial direction, and the blades adjacent to each other with the reinforcing plate 10 in between are ! 1 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 I2 is used by rotating around its axis as in the conventional case, and the gas moving along the axis inside the fan 12 flows outward from between the blades l1. In this case, since the inner surface of the reinforcing plate 10 and the inner surface of the blade It 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 10. There is no turbulence in the flow, and since the adjacent blades II are arranged on the M-line with each other separated by the reinforcing plate IO, the gas flowing out from between each blade 11 as the fan 12 rotates is synchronized. However, the wind can be sent in the same direction, reducing the flow resistance.

〔Effect of the invention〕

As explained above, the present invention is a fan molding die for integrally molding a P# fan made of a plurality of blades connected by a plurality of ring-shaped reinforcing plates. A plate is provided so that it can be opened and closed freely, and a movable receiving plate is provided on this movable template so that it can be opened and closed, and a plurality of vane inserts forming each of the vanes are provided between the fixed template and the movable template. A plurality of split molds, which are provided so as to be movable toward and away from each other in a plane perpendicular to the opening direction, and which fix the respective blade inserts in contact with each other, are attached to the outer side of the blade inserts. a mold opening/closing mechanism that is detachably provided and that opens the movable template and the movable receiving plate relative to the fixed template, and then opens the movable receiving plate relative to the movable template, and is fixed to the movable template; a split mold drive mechanism that brings the split mold into contact with and separates from the blade insert when the gap between the split mold and the blade insert is opened; and a split mold drive mechanism that brings the blade inserts into contact with each other while the split mold is separated from the blade insert. Since this machine is equipped with a mechanism for opening and closing the blade insert, the mold opening and closing mechanism opens the space between the fixed mold plate and the movable mold plate, and the split mold drive mechanism moves the split mold to the outside of the blade insert. By separating the blade inserts, then separating the blade inserts from each other using the insert opening/closing mechanism, and then separating the movable receiving plate from the movable mold plate and taking out the molded product attached to the movable receiving plate, the resin fan can be easily manufactured. It can be integrally molded into a plastic fan, eliminating the need for the troublesome adhesive work that was previously required, and also eliminating turbulence in the flow when the resin fan is rotated, reducing resistance. It is possible to suppress the runout caused by
Good quality products can be molded smoothly.

[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 sales cam plate are overlapped, and Figure 7 is An explanatory diagram showing the positional relationship between the fixed mold plate and the movable mold plate after the mold is opened, Fig. 8 is an explanatory diagram showing the movable receiving plate side after the mold is opened, and Fig. 9 is an operation explanation showing the operation of each part of the mold. Figures 1O and 11 show an example of a fan injection molded using the injection mold of the present invention, and Figure 10 is a front view, and Figure 1! The figures are cross-sectional views, Figures 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, 2I... Movable template, 30...
- First movable receiving plate, 31... Second movable receiving plate, 33...
Core type, 37... Feather insert, 41... Split type, 44.
・Hydraulic cylinder (split drive mechanism), 71.72...
Hydraulic cylinder (nested opening/closing mechanism).

Claims (1)

[Claims] This 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 receiving plate is provided to be openable and closable, while a plurality of blade inserts forming each of the blades are provided between the fixed mold plate and the movable mold plate so as to be movable toward and away from each other in a plane perpendicular to the mold opening direction. , and on the outside of these blade inserts, a plurality of split molds for fixing the blade inserts in contact with each other are provided so as to be movable toward and away from the blade inserts, and the movable mold plate and the movable receiving plate are provided. a mold opening/closing mechanism that opens the movable receiving plate to the fixed mold plate, and then opens the movable receiving plate to the movable mold plate; It is characterized by comprising a split mold drive mechanism that brings the blade inserts into contact with and separates from them, and a nest opening/closing mechanism that brings the blade inserts into contact with and separates from each other while the split mold is separated from the blade insert. Mold for fan molding.