GB2059859A - A rotary member made of plastics material - Google Patents
A rotary member made of plastics material Download PDFInfo
- Publication number
- GB2059859A GB2059859A GB8023832A GB8023832A GB2059859A GB 2059859 A GB2059859 A GB 2059859A GB 8023832 A GB8023832 A GB 8023832A GB 8023832 A GB8023832 A GB 8023832A GB 2059859 A GB2059859 A GB 2059859A
- Authority
- GB
- United Kingdom
- Prior art keywords
- insert
- plastics material
- bore
- annular wall
- hub
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 17
- 239000004033 plastic Substances 0.000 title claims abstract description 16
- 229920003023 plastic Polymers 0.000 title claims abstract description 16
- 230000006835 compression Effects 0.000 claims abstract description 4
- 238000007906 compression Methods 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims 2
- 238000000465 moulding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1459—Coating annular articles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
- F04D29/329—Details of the hub
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/087—Propellers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A rotary member, such as a fan 5, is moulded from plastics material on an insert 1 having a tubular body 2 with an outwardly oriented flange 3 at one end and a parallel inward flange 4 at the other. Perforations 2a allow the plastics material to penetrate through the insert to a 4 spindle 6 forming a core of the mould. The flanges 3 and 4 are on a level with the two opposite faces of the hub of the rotary member which is thus perfectly centred with respect to its bore. The hub can absorb axial forces of compression. The invention is applicable to fans of rotary electric machines. <IMAGE>
Description
SPECIFICATION
A rotary member made of plastics material
The present invention relates to improvements in rotating members made of plastics material such as the fans used in association with electric machines.
Fans made of plastics material are used in industry as their cost price is much lower than that of members of the same type made of sheet metal. These fans are generally moulded on an insert made by means of a metal ring comprising at least one keyway. This ring is obtained by sintering or machining by conventional methods so that its cost price is relatively high.
When a fan is moulded around an insert of this type, the moulded piece is not always perfectly centred with respect to the spindle on which the ring is fitted, so that the mean plane of the fan may be slightly oblique with respect to the perpendicular to the geometrical axis of the spindle in question. This generally occurs due to the clearance existing between the spindle and the bore of the ring.
Under these conditions, the fan rotates like a buckled wheel, which may have detrimental consequences on the apparatus with which it is assembled.
The hub of such fans is often compressed axially between two members of different diameters, with the result that they can abut on the central ring only via support washers, this increasing the cost price. In fact, it will be understood that if the members abutted directly against the plastics material, the latter would be deformed under the effect of the pressure and heat, causing clearance in the stacking of the parts.
It is an object of the improvements forming the subject matter of the present invention to remedy these drawbacks and to enable a rotating member made of plastics material, particularly a fan wheel, to be produced which is perfectly centred and which absorbs the axial efforts on the faces of its hub.
In accordance with the invention, the rotating member is moulded on an insert stamp in the form of a cup comprising an outwardly turned flange and whose bottom is open so as to form an annular wall oriented towards the centre and parallel to the flange, all being such that the moulded plastics material cooperates with a spindle of the mould on which said annular wall is centred.
The invention will be more readily understood on reading the following description with reference to the accompanying drawings, in which:
Figure 1 is a perspective view of an insert used for making a rotating member made of plastics material according to the invention.
Figure 2 is a partial view in section of the mould intended for making the member according to the invention.
Figure 3 illustrates in partial section the assembly of a rotating member according to the invention on the shaft of an electric apparatus.
Referring now to the drawings, Fig. 1 shows an insert 1 made by stamping a flat metal sheet. This insert comprises a tubular body 2 of which one of the ends is provided with an outwardly oriented flange 3, whilst its opposite end comprises an annular wall 4 oriented towards the centre. Thus, the insert 1 is provided with two ends which are parallel but oriented in opposite directions. Two diametrically opposite grooves 4a, 4b are made in the annular wall 4, the role of which grooves will be explained hereinafter. Similarly, the reason for the presence of perforations 2a made in the tubular body 2 and which pass right through the latter, will also be set forth.
Fig. 2 shows a partial view of a mould for producing a rotating member such as a fan 5 whose hub 5a is moulded on the insert 1. To effect moulding, the insert is engaged about a spindle 6 disposed in the shaping mould, the insert being centred on this spindle 6, by the bore 4c of the annular wall 4. Once the mould is closed, an appropriate plastics material is injected into the cavity enclosing the insert so that this plastics material under pressure surrounds this insert, and penetrates inside it in the space located between the spindle 6 and the inner wall of its tubular body 2 due to the presence of the perforations 2a.In this way, even if the geometrical axis of the insert is not merged with that of the spindle 6, the member 5 is perfectly centred with respect to its bore Sb determined by this spindle during moulding so that it does not comprise any out-of-roundness. It will be noted that the spindle 6 is provided with two outer fillets 6a, 6b in register with the grooves 4a,4b of the insert and which allow two axial passages 5c, Sdto be made in the bore of the hub 5a. After moulding, the flange 3 and the annular wall 4 are on a level with each face of the hub 5a.
In the embodiment shown in Fig. 3, the fan 5 is mounted on a bearing surface 7a of a shaft 7 between a crosspiece 8 and the end 9a of pulley 9. It is observed that the hub 5a of the member 5 is compressed between the crosspiece 8 and the pulley 9 due to the tightening of a nut 10. The bearing surface 7a of the shaft 7 is provided with a key 11 which passes through one of the corresponding passages Sc-Sdof the member 5 to cooperate with the side faces of one of the grooves 4a-4b. Due to the shape of the insert 1, the compression exerted on the hub 5a by the crosspiece 8 and the pulley 9 is absorbed by this insert on which the pieces in question are respectively in abutment via the annular wall 4 and the flange 3.
A rotating member made of plastics material has thus been produced which does not comprise any out-of-roundness, and of which the hub may absorb axial efforts of compres sron.
The preceding description has, of course, been given only by way of non-limiting exam ple and the replacement of the details of execution described by any other equivalents in no way goes beyond the scope of the invention.
Claims (3)
1. A rotating member made of plastics material, particularly a fan, whose hub moulded on at least one metal insert is subjected to axial forces of compression, wherein the insert is in the form of a cup comprising an outwardly turned flange and whose bottom is open so as to form an annular wall oriented towards the centre and parallel to the flange.
2. A member as claimed in Claim 1, wherein the insert is stamped.
3. A member according to claim 1 or claim 2 being a fan.
3. A member as claimed in Claim 1, wherein the bore of the annular wall abuts against the shaft which passes through the hub.
4. A member as claimed in Claim 3, wherein the annular wall is provided with at least one keyway or groove.
5. A member as claimed in Claim 4, wherein the tubular body comprises means for anchoring in the plastics material.
6. A member as claimed in Claim 5, wherein the anchoring means are made in the form of openings allowing the passage of the plastics material injected so that it comes inside the cup to form a bore having a diameter equal to the inner diameter of the annular wall of the insert.
7. A member as claimed in Claim 6, wherein its bore comprises as many longitudinal passages as there are keyways in the annular wall of the insert and which are located in the geometrical axis thereof.
8. A rotary member substantially as described hereinabove and illustrated in the accompanying drawings.
CLAIMS (20Jan 1981)
1. A rotating member made of plastics material having provided with a hub moulded on a metal insert and a bore by which it can be mounted on a shaft between two members which subject it to axial compression, wherein the insert takes the form of a sleeve with an outwardly turned flange at one end and an inwardly turned flange at the other end, the inwardly turned flange extending inwardly as far as the said bore.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7919626A FR2462596A1 (en) | 1979-07-25 | 1979-07-25 | IMPROVEMENTS IN PLASTIC ROTATING BODIES SUCH AS FANS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2059859A true GB2059859A (en) | 1981-04-29 |
| GB2059859B GB2059859B (en) | 1983-03-02 |
Family
ID=9228458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8023832A Expired GB2059859B (en) | 1979-07-25 | 1980-07-21 | Rotary member made of plastics material |
Country Status (6)
| Country | Link |
|---|---|
| DE (1) | DE3026775A1 (en) |
| ES (1) | ES252605Y (en) |
| FR (1) | FR2462596A1 (en) |
| GB (1) | GB2059859B (en) |
| IN (1) | IN152287B (en) |
| IT (1) | IT1131753B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2151537A (en) * | 1983-12-22 | 1985-07-24 | Schaeffler Waelzlager Kg | Moulding onto a metal bore reinforcing sleeve |
| GB2207197A (en) * | 1987-07-22 | 1989-01-25 | Concentric Pumps Ltd | Water pump impeller |
| US4806081A (en) * | 1986-11-10 | 1989-02-21 | Papst-Motoren Gmbh And Company Kg | Miniature axial fan |
| GB2185074B (en) * | 1985-11-08 | 1990-12-19 | Papst Motoren Gmbh & Co Kg | Fan |
| USRE34456E (en) * | 1985-10-08 | 1993-11-23 | Papst Motoren | Miniature axial fan |
| GB2268980A (en) * | 1992-07-22 | 1994-01-26 | Valeo Thermique Moteur Sa | Fan rotor. |
| GB2312023A (en) * | 1996-04-10 | 1997-10-15 | Johnson Electric Sa | Centrifugal fan |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1199739B (en) * | 1986-12-11 | 1988-12-30 | Marelli Componelli Elettromecc | PROCEDURE FOR LOCKING, ON A DRIVING SHAFT OF A PRINTED ROTOR, IN PARTICULAR OF A PLASTIC FAN PRINTED ON THE SHAFT OF AN ELECTRIC MOTOR, AND EQUIPMENT FOR PERFORMING THE PROCEDURE |
| EP0310391B1 (en) * | 1987-10-01 | 1992-05-27 | Seiko Electronic Components Ltd. | Axial flow fan |
| DE4226498A1 (en) * | 1992-08-11 | 1994-02-17 | Klein Schanzlin & Becker Ag | Agitator propeller |
| DE4338475A1 (en) * | 1993-11-10 | 1995-05-11 | Bmw Rolls Royce Gmbh | Shaft/hub connection with a light-alloy hub |
| DE59709807D1 (en) * | 1996-07-31 | 2003-05-15 | Rolf Kistner | ROLLER |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE757014A (en) * | 1969-10-04 | 1971-03-16 | Schloz Motor Condensator | |
| DE2758669C2 (en) * | 1977-12-29 | 1980-03-06 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Plastic hub that can be attached to a shaft |
-
1979
- 1979-07-25 FR FR7919626A patent/FR2462596A1/en active Granted
-
1980
- 1980-07-15 DE DE19803026775 patent/DE3026775A1/en not_active Withdrawn
- 1980-07-21 GB GB8023832A patent/GB2059859B/en not_active Expired
- 1980-07-22 IT IT23597/80A patent/IT1131753B/en active
- 1980-07-23 ES ES1980252605U patent/ES252605Y/en not_active Expired
- 1980-07-24 IN IN851/CAL/80A patent/IN152287B/en unknown
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2151537A (en) * | 1983-12-22 | 1985-07-24 | Schaeffler Waelzlager Kg | Moulding onto a metal bore reinforcing sleeve |
| USRE34456E (en) * | 1985-10-08 | 1993-11-23 | Papst Motoren | Miniature axial fan |
| GB2185074B (en) * | 1985-11-08 | 1990-12-19 | Papst Motoren Gmbh & Co Kg | Fan |
| US4806081A (en) * | 1986-11-10 | 1989-02-21 | Papst-Motoren Gmbh And Company Kg | Miniature axial fan |
| GB2207197A (en) * | 1987-07-22 | 1989-01-25 | Concentric Pumps Ltd | Water pump impeller |
| GB2207197B (en) * | 1987-07-22 | 1991-08-21 | Concentric Pumps Ltd | Water pump impeller. |
| GB2268980A (en) * | 1992-07-22 | 1994-01-26 | Valeo Thermique Moteur Sa | Fan rotor. |
| GB2268980B (en) * | 1992-07-22 | 1995-11-29 | Valeo Thermique Moteur Sa | A fan hub |
| GB2312023A (en) * | 1996-04-10 | 1997-10-15 | Johnson Electric Sa | Centrifugal fan |
Also Published As
| Publication number | Publication date |
|---|---|
| ES252605Y (en) | 1981-05-16 |
| IN152287B (en) | 1983-12-10 |
| DE3026775A1 (en) | 1981-02-19 |
| GB2059859B (en) | 1983-03-02 |
| FR2462596B1 (en) | 1983-07-22 |
| IT1131753B (en) | 1986-06-25 |
| FR2462596A1 (en) | 1981-02-13 |
| IT8023597A0 (en) | 1980-07-22 |
| ES252605U (en) | 1980-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |