JPH05318539A - Method and apparatus for molding thin-walled multilayered laminate - Google Patents

Abstract

PURPOSE:To easily and inexpensively perform the injection molding of a thin-walled multilayered laminate having a complicated shape by integrally molding the outside half split parts of the blades interposed between annular plates and integrally molding the inner peripheral parts of the annular plates along with the inside half split parts of the blades in the adjacent part thereof to fuse the same and integrally molding the blades between many annular plates. CONSTITUTION:A fan blade B is formed by laminating many thin annular plates 13 so as to leave an interval 8. In this case, a plurality of arc-shape blades 14 are integrally provided between the annular blades 13, 13. A large number of second narrow horizontal annular grooves 40 are provided to the outside molding surface of a collapsible core 25 and a plurality of vertical grooves 41 for forming second blades are provided to the inner openings of the second horizontal annular grooves 40 so as to leave an interval. Each of split slide cores 32 is formed by providing many first horizontal annular grooves 35 to an inside molding surface and forming vertical grooves 36 for forming first blades on the inside molding surface in a radius direction. When the first and second horizontal annular grooves 36, 40 are matched, the vertical grooves 36 for forming the first blades are matched with the vertical grooves 41 for forming the second blades.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a thin-walled plate multilayer laminate capable of inexpensively producing a precise thin-walled plate multilayer laminate, and a molding apparatus used for the method.

[0002]

2. Description of the Related Art Conventionally, there has been a blower fan F capable of quiet operation as one form of a thin plate multilayer laminate, and one specific example thereof is shown in FIGS. 22 and 23.

In such a multi-layer disc fan F, a fan blade 101 driven by an electric motor 100 is disposed substantially at one end of a fan casing 110.

By driving the electric motor 100, the fan blade 101 is rotated to generate an air flow, and the air can be sent out from the air outlet 103.

Further, as shown in FIG. 22, since the fan blade 101 is constructed by laminating a large number of thin annular plates 104 at predetermined intervals, the air resistance generated on the surface of the annular plates 104 is utilized. The airflow can be generated and the fan can be operated quietly.

Further, a predetermined space is provided between the annular plates 104, and air is allowed to flow smoothly from the inner peripheral side to the outer peripheral side to increase the fan air volume. Therefore, as shown in FIGS. 22 and 23,
A plurality of arc-shaped straightening vanes 105 that also function as spacers,
It is interposed between the annular plates 104 at a required circumferential pitch.

[0007]

However, such a blower fan F still has the following problems to be solved.

That is, when manufacturing the fan blade 101 arranged in the fan casing 110, first, the substrate
A plurality of connecting pins 107 are erected on the 106, and then, as shown in FIGS. 24 and 25, through holes 108 formed in each annular plate 104,
By inserting the connecting pins 107 into the through holes 109 provided in each straightening vane 105, a large number of annular plates 104 are assembled with the straightening vanes 105 interposed.

However, the connecting pin 107 is connected to the through holes 108,
The work of inserting it into the 109 is extremely troublesome and inefficient when manually performed.

On the other hand, it is possible to automatically assemble the fan blade 101 by using an assembly robot.
Since the process becomes complicated, the device structure becomes complicated and the control becomes complicated. As a result, the manufacturing cost and running cost of the assembly robot are significantly increased, and inevitably,
The Fan Blade 101 was expensive.

An object of the present invention is to provide a molding method and a molding apparatus for a thin-walled multilayer laminate which can solve the above-mentioned problems.

[0012]

According to the present invention, there is provided a method for forming a thin-walled multilayer laminate having a plurality of blades interposed between a plurality of annular plates which are laminated with a constant gap therebetween. That is, while integrally molding with the outer half-divided portion of the blade interposed between the annular plates, in the adjacent portion, the inner peripheral portion of the annular plate is integrally molded with the inner half-divided portion of the blade, To integrally form a thin-walled plate multi-layered body having wings between a large number of laminated annular plates by integrally fusing and joining the inner and outer peripheral parts and the inner and outer halves of the wing. The present invention relates to a method for forming a thin-walled plate multilayer laminate characterized by the above.

The present invention is also a method for molding a thin-walled multilayer laminate, which is constructed by interposing a plurality of blades between a large number of annular plates which are laminated while maintaining a constant gap therebetween.
B) A plurality of axially spaced inner axial openings on the inner molding surface of the expandable collapsible core at the inner openings of the plurality of first horizontal annular grooves spaced axially on the inner molding surface of the annular mold. The outer peripheral molding space is formed by inserting and closing the annular horizontal flange portion of (2), and the molding material is filled in the outer molding space through the first blade forming vertical groove provided on the inner molding surface of the annular mold. C) After the molding material has hardened to some extent, the annular horizontal collar portion is separated from the first horizontal annular groove, and d) the collapsible core is moved in the axial direction to form the annular first horizontal annular groove,
The outer molding surface of the collapsible core is aligned with and communicates with the second horizontal annular groove provided in the axial direction to form an inner peripheral molding space in the second horizontal annular groove, and at the same time, on the outer molding surface of the collapsible core. The first vertical groove for forming the second blade provided
(E) Matching to the blade forming vertical groove, (e) The inner peripheral molding space is additionally filled with the molding material through the second blade forming vertical groove provided on the outer molding surface of the collapsible core, and the molding material is peripherally molded space. Integrate with the molding material inside and harden it to integrally form a thin-walled multilayer laminate with wings interposed between annular plates, and f) demold the thin-walled multilayer laminate from the annular mold and the collapsible core. The present invention relates to a method for molding a thin-plate multilayer laminate, which comprises the above steps.

According to the present invention, a) an annular body is formed from a plurality of split dies, and a plurality of narrow first horizontal annular grooves are axially formed on an inner molding surface provided on the inner peripheral surface of the annular body. An annular mold having a first blade-forming vertical groove provided at an interval in the circumferential direction on the inner molding surface, and (b) disposed inside the annular mold to mold the inner molding of the annular upper mold. A plurality of narrow second horizontal annular grooves are provided at intervals in the axial direction on the outer molding surface facing the surface, and a plurality of second horizontal annular grooves are provided at the inner openings of the second horizontal annular groove at intervals in the circumferential direction. A collapsible core provided with blade forming vertical grooves and a plurality of annular horizontal flanges on the outer molding surface axially separated from the second horizontal annular groove, and c) The annular split mold is radially formed. An annular type drive mechanism that can move forward and backward to expand and contract the inner molding surface radially, and d) Axial direction of the collapsible core And a core drive mechanism capable of radially expanding and contracting the outer molding surface thereof, and at the first molding position, the inner opening of the first horizontal annular groove is closed by the annular horizontal collar portion, The outer peripheral part forming space communicating with each other through the first blade forming vertical groove is formed, and the first horizontal annular groove and the second horizontal annular groove are combined at the second forming position, and the first blade forming vertical groove is formed. And a second blade forming vertical groove are combined, and passed through a first blade forming vertical groove and a second blade forming vertical groove,
The present invention relates to a molding device for a thin-plate multi-layer laminate, characterized in that the inner peripheral molding spaces formed between the annular horizontal flanges are communicated with each other.

Further, according to the present invention, in the above molding apparatus, the flow straightening blade molding space can be formed by the first blade forming vertical groove and the second blade forming vertical groove.

Further, the thin plate multilayer laminate molded by the molding method or the molding apparatus according to the present invention can be used for various purposes. In addition to fan blades used for multilayer disk fans and the like, heat exchange is also possible. It can be widely used in vessels and other technical fields.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method and apparatus for molding a thin-walled multi-layer laminate according to the present invention will be described below with reference to the accompanying drawings.

In this embodiment, the thin-walled multi-layer laminate is
This is the case where it is used as the fan blade B of the multilayer disc fan A used as a warm air fan.

(Structure of Fan Blade B) First, the structure of the fan blade B integrally molded by the molding method or the molding apparatus of the thin plate multilayer laminate according to the present invention and the structure of the multilayer disk fan A equipped with the fan blade B are described. Will be described.

As shown in FIGS. 1 to 3, the multi-layer disk fan A has fan blades B arranged concentrically in a fan casing 10, and one end side of the fan blades B is a fan. Electric motor mounted on the rear wall of casing 10
It is connected to 11 output shafts.

Then, the fan blade B is rotated by driving the electric motor 11 to generate an air flow, and the air can be sent out from the air outlet 12.

As shown in FIG. 2, the fan blade B is formed by laminating a large number of thin annular plates 13 with a predetermined gap δ therebetween, so that the air resistance generated on the surface of the annular plates 13 is reduced. The airflow can be generated by using the airflow, and the operation of the multilayer disc fan A can be quietly performed. In addition, 13a is a mounting substrate.

Further, since a predetermined space δ is provided between the annular plates 13 and 13 and air is smoothly flowed from the inner peripheral side to the outer peripheral side to increase the fan air volume, as shown in FIG. A plurality of functioning arcuate wings 14 and an annular plate 1
It is installed between 3 and 13 at the required circumferential pitch.

As is apparent from FIGS. 3 and 4, the fan blade B described above can be integrally injection-molded by the molding apparatus C described below. That is, all the constituent elements of the fan blade B can be molded as one body.

(Molding Device C) Next, with respect to the structure of the molding device C for the thin-walled multilayer laminate, referring to FIGS.
This will be specifically described.

First, the overall structure of the molding apparatus C for a thin-plate multi-layer laminate will be described with reference to FIGS. 5 and 6.

In FIG. 5, reference numeral 20 denotes an elevating stand which can be raised and lowered by an elevating device (not shown), and a center pin 21 having a hollow circular cross section and a long length is erected at the center of the upper surface of the elevating stand 20.

An annular guide mounting plate 61 is placed on the upper surface of the lifting platform 20, and the guide mounting plate 61 is moved relative to the lifting platform 20 by the operation of the guide drive cylinder 60. You can move up and down.

A plurality of elongated slide core protrusion guides 22 are provided upright on the peripheral edge of the guide mounting plate 61 at regular intervals in the circumferential direction. In addition, a slide core moving bent portion 22a that is bent toward the center of the center pin 21 is formed at the upper end portion of each protruding guide 22.

A disk-shaped core mounting frame 23 having a depressed central portion is concentrically arranged above the lifting platform 20.

The peripheral portion 23a of the core mounting frame 23 is supported on the elevating platform 20 by a plurality of drive cylinders 24, and the operation of the drive cylinders 24 causes the core mounting frame 23 to move in the axial direction relative to the elevating platform 20. Can be moved relative to. Incidentally, 24a is a cylinder rod of the drive cylinder 24.

On the other hand, the depression 23b of the core mounting frame 23
The base end of the cylindrical collapsible core 25 is fixedly connected to the inner edge of the.

Further, the peripheral edge portion 23a of the core mounting frame 23 is provided with a plurality of guide insertion holes 26 having a rectangular cross section at regular intervals in the circumferential direction, and through the guide insertion holes 26, the above-mentioned protrusions are formed. The straight portion 22b of the guide 22 penetrates.

The collapsible core 25 has a large number of second horizontal annular grooves 40 on the outer molding surface provided on the upper outer peripheral surface thereof in the axial direction, as is apparent from FIGS. It is provided at intervals. Further, as apparent from FIGS. 6 and 7, a plurality of second blade-forming vertical grooves 41 are provided in the inner opening of the second horizontal annular groove 40 at intervals in the circumferential direction.

Further, the collapsible core 25 is provided with a large number of annular horizontal flange portions 42 on the outer molding surface which is separated from the second horizontal annular groove 40 in the axial downward direction, and below the annular horizontal flange portion 42. An annular ridge 43 that contacts the upper end of an outer cylinder 38 described later.
Is provided.

As can be seen from FIG. 8, the collapsible core 25 has substantially the same overall shape as the core disclosed by the applicant of the present application in Japanese Patent Application No. 63-301784, and has a large number in the circumferential direction. A cylindrical body 25b having a vertical slit 25a with an arcuate cross section, and an elongated piece 25c with an arcuate cross section fitted in each vertical slit 25a.
The attachment of the to the tubular body 25b is performed by the holding tube 25d.

Further, as shown in FIG. 5, a thick movable die 28 having a core penetrating opening 27 in the center is concentrically arranged above the core mounting frame 23. Through 27, the collapsible core 25 can penetrate upward.

On the other hand, as shown in FIG. 5, the peripheral edge of the movable die 28 is provided with a plurality of guide insertion holes 29 having a rectangular cross section at regular intervals in the circumferential direction. Through the bent portion 22a and the straight portion 22a of the protruding guide 22 described above.
b and penetrate.

Since the bent portion 22a of the protruding guide 22 is fitted into the guide insertion hole 29, the upper radial length is longer than the lower radial length.

As shown in FIGS. 6 and 7, the movable die 28 is provided with a plurality of core guide blocks 30 each having a triangular shape in a plan view, on the upper surface thereof. A core guide groove 31 extending linearly toward the center of the movable die 28 with a constant inclination angle α is formed in the.

The slide core is inserted in each core guide groove 31.
32 is provided so as to be slidable in the radial direction, and the slide core 32 is formed with a guide fitting groove 33 into which the bent portion 22a of the protruding guide 22 is fitted. The plurality of core guide blocks 30 and the plurality of slide cores 32 described above form an annular mold 34 on the movable mold 28.

With this structure, the slide core 32 moves forward and backward in the radial direction in association with the raising and lowering operation of the protrusion guide 22.

As is apparent from FIG. 5, each split slide core 32 has a large number of narrow first horizontal annular grooves 35 on the inner molding surface provided on the inner peripheral surface thereof through a thin partition wall 35a. It is provided in a stacked manner in the vertical direction. Further, as shown in FIGS. 6 and 7, a first blade forming vertical groove 36 extending in the radial direction is formed on the inner molding surface thereof.

As will be described later, the first horizontal annular groove 35 is interlocked with the relative movement of the collapsible core 25 in the axial direction, and the annular horizontal collar portion 42 and the second horizontal annular groove 40 provided on the outer peripheral surface of the core 25. Can be matched to each.

The first horizontal annular groove 35 has an annular horizontal collar portion.
When aligned with 42, as shown in FIG.
42 will fit into the first horizontal annular groove 35.

On the other hand, the first horizontal annular groove 35 is the second horizontal annular groove.
When aligned with 40, as shown in FIGS.
The first blade forming flutes 36 provided in the 34 are the collapsible core 25.
It will be aligned with the second blade forming vertical groove 41 provided on the outer peripheral surface of the.

Furthermore, as shown in FIG.
An outer cylinder mounting plate 37 is integrally attached to the lower surface of the outer cylinder mounting plate 37, and the base end of an outer cylinder 38 that holds the outer peripheral surface of the collapse core 25 is connected to the inner peripheral edge of the outer cylinder mounting plate 37.

Further, as shown in FIG. 5, the tip of the cylinder rod 62a of the drive cylinder 62 is connected to the lower surface of the periphery of the movable die 28, and the base end of the drive cylinder 62 is the periphery of the core mounting frame 23. It is attached to part 23a.

With this structure, the drive cylinder 62 is operated to move the movable die 28, and the core attachment frame 23 and the collapsible core 25 attached to the core attachment frame 23.
Can be moved relative to each other in the axial direction.

The cylinder rod 62 of the drive cylinder 62
The a penetrates a rod insertion hole 37a provided in the peripheral edge of the outer cylinder mounting plate 37.

As shown in FIGS. 5 and 6, a fixed die 45 is concentrically arranged above the movable die 28, and a resin inflow guide board 46 is provided on the inner peripheral side of the fixed die 45. Is fitted,
The resin inflow guide board 46 has a flat resin inflow space 47 formed on the upper surface thereof, and the resin inflow space 47 described above is provided at the peripheral edge portion thereof with the first blade forming vertical groove 36 and the second blade forming vertical groove. A plurality of resin inflow passages 48 communicating with the groove 41 are provided at regular intervals in the circumferential direction.

On the lower surface of the resin inflow guide board 46, an opening / closing auxiliary collet 50 in which a plurality of actuating pieces 49 which can be expanded and contracted in the radial direction are vertically provided on the outer peripheral edge is fixed.
50 can cooperate with the above-described upper tapered surface 51 of the center pin 21 to press the outer peripheral molding surface of the collapsible core 25 against the inner peripheral molding surface of the annular mold 34, and release the pressing. it can.

Further, as shown in FIG. 5, stopper pieces 45a are provided on the peripheral portion of the lower surface of the fixed die 45 at regular intervals in the circumferential direction, and the stopper pieces 45a are equal to or larger than the set distance in the radial direction of the slide core 32. It regulates the outward movement of the.

As shown in FIG. 5, a stripper 52 and an injection mold 53 are further arranged in layers on the above-mentioned fixed mold 45. The stripper 52 and the injection mold 53 have central portions,
Resin inflow space provided above the resin inflow guide cylinder 46
Resin-filled flow paths 54, 55 communicating with 47 are formed.

A punch for removing a runner for removing a runner 56 formed by hardening of the molding resin in the resin inflow space 47 and the resin filling flow paths 54, 55 is provided at the peripheral portions of the stripper 52 and the injection mold 53. A guide hole 57 is formed.

In FIG. 5 and FIGS. 9 to 18 which will be described later, 58 is a first connecting link for connecting the movable die 28 and the fixed die 45, and 59 is a connection between the fixed die 45, the stripper 52, and the injection die 53. Is a second connecting link.

(Operation) Hereinafter, a method of manufacturing the fan blade B using the above-described apparatus C for forming a thin-walled multilayer laminate will be specifically described with reference to FIGS. 9 to 21. 19 to 21 are shown in FIGS. 9, 10 and
FIG. 13 is an enlarged explanatory diagram of 13.

(Step 1) As shown in FIGS. 9 and 19, in the molding apparatus C, the inner openings of a plurality of first horizontal annular grooves 35 provided on the inner molding surface of the annular mold 34 at intervals in the axial direction. Part of the collapsible core 25, which is expandable and contractible, is inserted / closed with a plurality of annular horizontal flange portions 42 provided at intervals in the axial direction on the outer molding surface of the collapsible core 25, and the fan blade B is inserted into the first horizontal annular groove 35. An outer peripheral molding space of the annular plate 13 is formed.

Next, the injection mold 53 is placed in the outer peripheral molding space.
Resin filling flow passage 55 provided in the stripper 52, resin filling flow passage 54 provided in the stripper 52, resin inflow space 4 provided in the resin inflow guide panel 46
7. Molding resin is filled through the resin inflow passage 48 and the first blade forming vertical groove 36 (see FIG. 6) provided on the inner molding surface of the annular mold 34.

In such a filling operation, the thin partition wall 35
The filling pressure is applied to a, and the partition wall 35a is deformed if it is left as it is, and it becomes difficult to keep the thickness of all the outer peripheral portion molding spaces uniform.

According to the present invention, since the annular horizontal collar portion 42 is inserted into each first horizontal annular groove 35, the partition wall 35a can be surely prevented from being deformed, and the outer peripheral portion molding space can have a uniform thickness. Can be held at.

Therefore, as will be described later, in the completely manufactured fan blade B, the thickness of all the annular disks 13 can be made uniform.

Further, in this embodiment, since a large number of first blade-forming vertical grooves 36 arranged at intervals in the circumferential direction can be used as gates for resin injection, low-pressure molding becomes possible, and eventually, low-pressure molding is possible. The mold thickness can be reduced, and a molding die can be manufactured at low cost.

(Step 2) After the molding resin has hardened to some extent, as shown in FIGS. 10 and 20, the elevating device is driven to lower the elevating platform 20, and the fixed mold 45 is moved in conjunction with the lowering. While separating from the movable mold 28, the injection mold 53 and the stripper 52 are integrally separated from the fixed mold 45.

In this operation, since the opening / closing auxiliary collet 50 interposed between the upper tapered surface 51 of the center pin 21 and the collapsible core 25 is released, the collapsible core 25 contracts in the radial direction, and this contraction causes an annular horizontal horizontal movement. The collar 42 is completely removed from the first horizontal annular groove 35.

(Step 3) At this point, the stripper
As shown in FIG. 10, the runner 56, which is the residue of the cured molding resin, is still attached to the lower surface of the 52, so it is necessary to remove the runner 56 in order to perform the next step. ..

Then, as shown in FIG. 11, the runner 56 can be removed by advancing the punch downward through the runner removal punch guide hole 57 provided in the injection mold 53 and the stripper 52.

(Step 4) Next, as shown in FIG. 12, the drive cylinder 24 is retracted and the drive cylinder 62 is advanced so that the stationary platform 20 and the center pin 21 are stationary. The core mounting frame 23 and the collapsible core 25 are relatively lowered integrally, and are lowered into the first horizontal annular groove 35 of the annular mold 34, and are expanded outward in the horizontal plane to form the first horizontal annular groove 35. A second horizontal annular groove provided on the outer molding surface of the collapsible core 25 at intervals in the axial direction.
40 are aligned and communicated with each other to form an inner peripheral portion forming space of the annular plate 13 of the fan blade B in the second horizontal annular groove 40.

At this point, the second blade forming flutes 41 formed on the outer molding surface of the collapsible core 25 should be aligned with the first blade forming flutes 36 formed on the inner molding surface of the annular mold 34. become.

(Step 5) As shown in FIGS. 13 and 21, the elevating device is driven to elevate the elevating stand 20, and the movable mold 28, the fixed mold 45, the stripper 52, and the injection mold 53 are integrated again. Connect them and make them ready for molding as in the case of FIG.

Then, the injection mold is placed in the inner peripheral molding space.
Resin filling flow passage 55 provided in 53, resin filling flow passage 54 provided in stripper 52, resin inflow space provided in resin inflow guide board 46
The molding resin is additionally filled through the second blade forming vertical groove 41 (see FIG. 6) provided on the outer molding surface of the resin inflow passage 48 and the collapsible core 25.

The molding resin filled in this way is
The inner peripheral portion of each annular plate 13 of the fan blade B is formed, and is integrated with the already formed outer peripheral portion to form the annular plate 13. Similarly, the vertical groove for forming the second blade
The molding resin filled in 41 is also integrated with the blade portion already molded in the first blade forming vertical groove 36, and the blade 14 is molded.

(Step 6) As shown in FIG. 14, the elevating device is driven to lower the elevating platform 20 again, and in conjunction with the lowering, the fixed mold 45 is separated from the movable mold 28, and the fixed mold 45 is separated. The injection mold 53 and the stripper 52 are integrally separated from each other.

In this operation, since the opening / closing assist collet 50 interposed between the upper tapered surface 51 of the center pin 21 and the collapsible core 25 is released, the collapsible core 25 contracts in the radial direction, and this contraction causes an annular horizontal The collar 42 is completely removed from the first horizontal annular groove 35.

(Step 7) At this point, the stripper
As shown in FIG. 14, since the runner 56, which is the residue of the cured molding resin, is still attached to the lower surface of the 52, it is necessary to remove the runner 56 in order to perform the next step. ..

Therefore, as shown in FIG. 15, the runner 56 can be removed by advancing the punch downward through the runner removal punch guide hole 57 provided in the injection mold 53 and the stripper 52.

(Step 8) Next, as shown in FIG. 16, the guide drive cylinder 60 is advanced to move the slide core protruding guide 22.
Together with the guide mounting plate 61,
Increase relative to 20. In this ascending operation, since the bent portion 22a is formed at the tip of the slide core protruding guide 22, the slide core 32 cooperates with the guide fitting groove 33 provided in the slide core 32, and
32 recedes radially. On the other hand, as the guide mounting plate 61 rises, the collapsible core 25 also rises integrally,
Since the center pin 21 is fixed to the lifting platform 20 in a stationary state, the collapsible core 25 is reduced in diameter in the radial direction.

Therefore, as shown in FIG. 17, the fan blade B as a thin-plate multilayer laminated body can be completely detached from the collapsible core 25 and the annular mold 34, and can be taken out to the outside.

(Step 9) After that, the elevating device is driven to elevate the elevating stand 20, and the movable die 28, the fixed die 45, the stripper 52, and the injection die 53 are integrally reconnected, and
The drive cylinder 24 is retracted and the drive cylinder 62 is advanced so that the molding is possible as shown in FIG. This moldable state is substantially the same as in step 1.

That is, as described with reference to FIGS. 9 and 19, in the same molding apparatus C, the inner openings of the plurality of first horizontal annular grooves 35 provided on the inner molding surface of the annular mold 34 at intervals in the axial direction. Part of the collapsible core 25, which is expandable and contractible, is provided with a plurality of annular horizontal flanges 42 provided at intervals in the axial direction on the outer molding surface.
Is inserted and closed, and the outer peripheral part forming space of the annular plate 13 of the fan blade B is formed again in the first horizontal annular groove 35.

After that, by repeating the above steps 1 to 9, the fan blades B can be continuously integrally molded, and precise fan blades B can be mass-produced and manufactured at low cost. it can.

Since the fan blade B manufactured in this manner is an integrally molded product, it is strong in strength and can be prevented from being damaged during use as much as possible.

Since the gap between the annular plates can be made as thin and uniform as possible, the air volume can be significantly increased while maintaining the compact shape, and the streamlines of the air flow can be cleaned. The noise generation can be minimized.

Since it is possible to increase the air volume and prevent noise generation while maintaining a compact shape, the installation space is not limited, and not only hot air fans and deodorizing fans but also heat exchanger fans and other It can be used for all purposes.

Further, other specific effects obtained by the molding apparatus C in the above embodiment will be described below.

Since the annular plate 13 is formed by double molding of the outer peripheral portion and the inner peripheral portion, the partition wall 35 of the annular mold 34 is formed.
a can be made as thin as possible, the thickness of the annular plate 13 and the annular plates 13,1
The gap δ between the three can be made as thin as possible, and the air volume can be increased and the noise can be reduced while maintaining a compact shape.

Since the forming gate (first and second blade forming vertical grooves 36, 41) can be provided for each blade 14, low-pressure forming is possible and the die can be manufactured at low cost.

The outer peripheral portion and the inner peripheral portion of the annular plate 13 can be formed by one forming gate (first and second blade forming vertical grooves 36, 41), and the forming operation can be performed easily. You can

The collapsible core 25 can be reliably contracted by the forced contraction device including the annular ridge 43 and the outer cylinder 38 provided on the outer surface of the collapsible core 25, so that the breakage of the collapsible core 25 can be surely prevented. it can.

Since the opening / closing auxiliary collet 50 is used, it is possible to prevent the inner surface of the collapsible core 25 from being seized on the outer periphery of the center pin 21.

When the slide cores 32 are alternately pulled out without being pulled out at the same time, the pulling out force can be dispersed and the fan blade B as a product can be prevented from being damaged.

With the molded product (the outer peripheral portion of the annular plate 13) kept in the slide core 32, the collapsible core 25 holds the annular plate 13 in place.
Since the inner peripheral portion of can be integrally molded, double molding can be easily performed.

If the inner diameter of the fan blade B is larger than the outer diameter of the collapsible core 25, the collapsible core
It is possible to prevent galling of the molded product when sliding 25.

[0094]

[Effects] In the present invention, the inner half of the annular plate and the inner half of the blade are integrally formed together with the outer half of the blade interposed between the annular plates, and at the adjacent portion. The inner and outer peripheral portions of the annular plate and the inner and outer half-divided portions of the blade are integrally fused and bonded to each other to integrally form a thin-walled multilayer laminated body having the blade between a number of laminated annular plates. By molding, a thin-plate multi-layer laminate is molded.

Therefore, it is possible to easily and inexpensively manufacture, by injection molding, a thin-plate multi-layer laminate having an extremely complicated shape in which wings are provided between a large number of laminated annular plates.

Further, since the thin-plate multi-layer laminate can be molded by injection molding, the dimensional accuracy of the thin-plate multi-layer laminate can be improved and the yield can be improved.

[0097]

[Brief description of drawings]

FIG. 1 is a perspective view of a multilayer disc fan in which a thin plate multilayer laminate formed by a method for forming a thin plate multilayer laminate according to the present invention is mounted as a fan blade.

FIG. 2 is a vertical cross-sectional view of the same multilayer disc fan.

FIG. 3 is a cross-sectional view of a fan blade as a thin plate multilayer laminate.

FIG. 4 is a sectional view of the fan blade according to FIGS.

FIG. 5 is a vertical cross-sectional view of an apparatus for forming a thin-walled multilayer laminate.

6 is a cross-sectional view taken along the line II-II of FIG.

FIG. 7 is an enlarged explanatory diagram of a main part of FIG.

FIG. 8 is an exploded perspective view of a collapsible core.

FIG. 9 is a process explanatory view of a method for forming a thin-walled multilayer laminate.

FIG. 10 is a process explanatory view of a method for forming a thin-walled multilayer laminate.

FIG. 11 is a process explanatory view of a method for forming a thin-walled multilayer laminate.

FIG. 12 is a process explanatory view of a method for forming a thin-walled multilayer laminate.

FIG. 13 is a process explanatory view of a method for forming a thin-walled multilayer laminate.

FIG. 14 is a process explanatory view of a method for forming a thin-walled multilayer laminate.

FIG. 15 is a process explanatory diagram of a method for forming a thin-walled multilayer laminate.

FIG. 16 is a process explanatory diagram of a method for forming a thin-walled multilayer laminate.

FIG. 17 is a process explanatory view of a method for forming a thin-walled multilayer laminate.

FIG. 18 is a process explanatory view of a method for forming a thin-walled multilayer laminate.

FIG. 19 is a process explanatory view of the method for forming a thin-walled multilayer laminate.

FIG. 20 is a process explanatory diagram of a method for forming a thin-walled multilayer laminate.

FIG. 21 is a process explanatory view of the method for forming a thin-walled multilayer laminate.

FIG. 22 is a vertical cross-sectional view of a multilayer disc fan including a fan blade made of a conventional thin-plate multilayer laminate.

23 is a sectional view taken along line III-III in FIG.

FIG. 24 is a perspective view of an annular plate of the fan blade.

FIG. 25 is a perspective view of a flow straightening vane of the figure fan blade.

[Explanation of symbols]

 A Multi-layer disc fan B Fan blade C Thin-walled plate multi-layer laminate forming device 10 Fan casing 11 Electric motor 12 Air outlet 13 Annular plate 14 Blade 20 Elevating stand 21 Center pin 22 Slide core protruding guide 22a Slide core moving bend 23 Core mounting frame 23a Edge 23b Cavity 24 Drive cylinder 24a Cylinder rod 25 Collapsible core 25a Vertical slit 25b Cylindrical body 25c Elongated piece 25d Holding tube 26 Guide insertion hole 27 Core through opening 28 Movable 29 Guide insertion hole 30 Core guide block 31 Core guide groove 32 Slide core 33 Guide fitting groove 34 Annular type 35 First horizontal annular groove 35a Thin partition wall 36 First blade forming vertical groove 37 Outer cylinder mounting plate 38 Outer cylinder 40 Second horizontal annular groove 41 Second blade Forming vertical groove 42 Annular horizontal flange 43 Annular ridge 45 Fixed type 45a Stopper piece 46 Resin inflow guide board 47 Resin inflow space 48 Resin inflow passage 49 Operating piece 50 Closing auxiliary collet 51 Upper tapered surface 52 Stripper 53 Injection mold 54 Resin filling flow channel 55 Resin filling flow channel 56 Runner 57 Runner removal punch guide hole 58 1st connecting link 59 2nd connecting link 60 Guide drive cylinder 61 Guide mounting plate 62 Drive cylinder 62a Cylinder rod

Continuation of front page (51) Int.Cl. ⁵ Identification number Reference number in the agency FI technical display location // B29L 31:08 4F (72) Inventor Masao Shiotani 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Totoki Co., Ltd. (72) Inventor Yasuo Hamada 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu, Fukuoka Prefecture Totoki Co., Ltd.

Claims (4)

[Claims] 1. A multi-layered thin plate laminate comprising a plurality of blades (14) interposed between a large number of annular plates (13) (13) laminated with a constant gap (δ) held between them. In the method of molding, the outer peripheral portion of the annular plate (13) is integrally formed with the outer half portion of the blade (14) interposed between the annular plates (13) and (13),
In the adjacent part, the inner peripheral part of the annular plate (13) is integrally molded with the inner half part of the blade (13), and the inner peripheral part and outer peripheral part of the annular plate (13) and the inner side of the blade (13). And the outer half-split part are integrally fused and joined, and the blade is placed between the multiple annular plates (13) (13) that are stacked.
A method for forming a thin-walled multilayer laminate, comprising integrally molding a thin-walled multilayer laminate including (14). 2. A thin plate multi-layer laminate comprising a plurality of blades (14) interposed between a large number of annular plates (13) (13) laminated with a constant gap (δ) held between them. A) The expandable and retractable collapsible core (a) is formed in the inner openings of the plurality of first horizontal annular grooves (35) provided in the inner molding surface of the annular mold (34) at intervals in the axial direction. The outer peripheral molding space is formed by inserting and closing a plurality of annular horizontal flanges (42) provided at intervals in the axial direction on the outer molding surface of (25) to form an outer peripheral molding space. The molding material is filled through the first blade forming vertical groove (36) provided on the inner molding surface of the mold (34), and (c) after the molding material is cured to some extent, the annular horizontal collar portion (42)
Is disengaged from the first horizontal annular groove (35), and d) the collapsible core (25) is moved in the axial direction, and the collapsible core (25) is inserted into the first horizontal annular groove (35) of the annular die (34).
A second horizontal annular groove (40) provided at an axial interval on the outer molding surface of the is aligned and communicated with each other to form an inner peripheral molding space in the second horizontal annular groove (40) and a collapsible core.
The second blade forming vertical groove (41) provided on the outer molding surface of (25)
Aligned with the blade forming vertical groove (36), (e) The inner peripheral molding space is additionally filled with the molding material through the second blade forming vertical groove (41) provided on the outer molding surface of the collapsible core (25). , The molding material is integrated with the molding material in the outer peripheral molding space and cured to integrally mold a thin-walled plate multilayer laminate in which the blades (14) are provided between the annular plates (13) (13). F) A method for forming a thin-walled multilayer laminate, comprising the steps described above, in which the thin-walled multilayer laminate is demolded from the annular mold (34) and the collapsible core (25). 3. A) An annular body is formed from a plurality of split molds, and a plurality of first narrow widths are formed on an inner molding surface provided on the inner peripheral surface of the annular body.
An annular die (34) provided with horizontal annular grooves (35) spaced apart in the axial direction, and a first blade forming vertical groove (36) provided in the inner molding surface at intervals in the circumferential direction; Arranged inside the annular mold (34), a plurality of narrow second horizontal annular grooves (40) are axially spaced on the outer molding surface facing the inner molding surface of the annular mold (34). With the second
In the inner opening of the horizontal annular groove (40), a plurality of second blade-forming vertical grooves (41) are provided at intervals in the circumferential direction, and further, the outer side is axially separated from the second horizontal annular groove (40). On the molding surface,
Collapsible core (25) with multiple annular horizontal collars (42)
C) An annular die drive mechanism that radially expands and contracts the inner molding surface by radially moving the split die of the annular die (34), and d) making the collapsible core (25) movable in the axial direction, and And a core drive mechanism capable of radially expanding and contracting the outer molding surface, and at the first molding position, the inner opening of the first horizontal annular groove (35) is closed by the annular horizontal collar portion (42) to form the first blade. While forming the outer peripheral molding space that communicates with each other through the forming vertical groove (36),
At the second molding position, the first horizontal annular groove (35) and the second horizontal annular groove
The first blade forming vertical groove (36) and the first blade forming vertical groove (36) are combined with the second blade forming vertical groove (41).
And a second blade forming vertical groove (41) through which the inner peripheral forming spaces formed between the annular horizontal flanges (42) are communicated with each other. 4. The straightening vane forming space can be formed by the first blade forming vertical groove (36) and the second blade forming vertical groove (41).
An apparatus for forming a thin-walled multi-layer laminate as described.