WO1998006164A1 - Sistema de sobreinyección directa vertical - Google Patents
Sistema de sobreinyección directa vertical Download PDFInfo
- Publication number
- WO1998006164A1 WO1998006164A1 PCT/ES1997/000198 ES9700198W WO9806164A1 WO 1998006164 A1 WO1998006164 A1 WO 1998006164A1 ES 9700198 W ES9700198 W ES 9700198W WO 9806164 A1 WO9806164 A1 WO 9806164A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- package
- cylindrical cavity
- mold
- magnetic plates
- lower body
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0054—Casting in, on, or around objects which form part of the product rotors, stators for electrical motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0012—Manufacturing cage rotors
Definitions
- the present invention relates to a vertical direct injection system, for obtaining a squirrel cage rotor consisting of a package of magnetic plates which: [i] has a succession of aligned holes, of a ring upper, of a lower body and bars of conductive material that fill said holes and extend between said upper ring and said lower body, forming a single piece; and [b] has an axial cavity.
- rotors of the said type comprise a magnetic sheet package that is traversed by a succession of conductive bars, normally located obliquely, extending from an upper ring to a lower one.
- These rings can form a succession of heat diffusing fins (in the case of a traditional type motor, with an internal rotor and an external stator) or one of them can form the dome or base (in the case of an engine of the type called " annular ", in which the rotor occupies an external position, wrapping the stator).
- the invention is aimed at correcting the aforementioned drawbacks, allowing in a special way to automate practically completely the manufacturing process of squirrel cage rotors, practically reducing material losses to zero, greatly increasing the manufacturing rate and eliminating or reducing to a minimum the finishing operations to which molded rotors must be subjected.
- a system of the type indicated at the beginning that is characterized by comprising: a mold that forms a cylindrical cavity of vertical ee and provided with a bottom, said cylindrical cavity being able to accommodate tightly and with possibility moving in the direction of said vertical axis, said package of magnetic plates; first means for pouring into said bottom of said cylindrical cavity, a volume of molten metal exactly necessary for the formation of said lower body said upper ring and said bars; and a second means suitable for acting on said magnetic sheet package, introducing it into said cylindrical cavity of said mold and moving it towards said bottom, in order to exert a pressing effect on said molten metal mass deposited on said bottom, determining the displacement ascending a part of said mass, through said succession of aligned holes.
- the magnetic sheet package is essential to use as a plunger in the injected molding operation of the molten metal mass that must constitute the squirrel cage rotor bars and rings.
- a mold is provided that forms a cylindrical cavity, closed at its bottom or provided therein with closing means, in which, at the beginning of each molding cycle, a volume must be poured exactly dosed from molten metal to overinject ar.
- j SUBSTITUTE SHEET (RULE 26) magnetic sheet package on which the injection should be performed adjusts exactly, as a piston, in the indicated cylindrical cavity, and is forced to move towards the bottom of this cavity by the action of a hydraulic cylinder (corresponding to it mechanism that in conventional injection molding machines determines the displacement of the piston which, through the corresponding channel or the corresponding channels, injects molten metal into the mold cavity).
- the sheet package determines the displacement of a part of the molten metal that occupies the bottom of the mold towards the top of it, through the successions of aligned holes provided in said plates, filling these successions of holes, which they correspond to the squirrel cage bars and become the upper ring of said cage.
- the system object of the invention will significantly increase the rate of production of the machine, will eliminate (without more than properly dosing the amount of molten metal that is poured into the mold in each operation) the metal losses (specifically the metal that fills the injection channels) that must be recycled with a very important added cost and with a sensitive loss of quality, and will also allow to significantly reduce the investment in molds, in particular because the same cylindrical mold can be used for the manufacture of rotors in which the thickness of the sheet package varies between relatively wide limits, and because, by avoiding the violent shock of the metal injected under pressure against the mold walls, one of the main causes that reduce the life of the molds will be eliminated Injection currently used.
- FIGS 1 to 7 are schematic sections, showing successive phases of a cycle carried out according to the invention, and specifically intended to obtain a squirrel cage rotor for an electric motor of the type called annular, that is, of the type (almost exclusively used for fan drive) comprising an internal stator and an outer rotor that wraps around it.
- annular that is, of the type (almost exclusively used for fan drive) comprising an internal stator and an outer rotor that wraps around it.
- FIG. 1 to 7 are schematic sections, showing successive phases of a cycle carried out according to the invention, and specifically intended to obtain a squirrel cage rotor for an electric motor of the type called annular, that is, of the type (almost exclusively used for fan drive) comprising an internal stator and an outer rotor that wraps around it.
- FIG. 1 to 7 are schematic sections, showing successive phases of a cycle carried out according to the invention, and specifically intended to obtain a squirrel cage rotor for an electric motor of the type called annular, that is, of the type (almost
- Figures 8 to 16 are schematic sections, analogous to those represented in the preceding figures, but referring to the manufacture of a squirrel cage rotor for electric motors of the type that possess the inner rotor and the outer stator, wrapping it. As can be seen from these figures, the same machine or basic installation can be used to manufacture these two types of rotors. Also in these figures, the manufacture of a rotor with maximum and minimum axial dimensions, respectively, has been represented on the left and on the right.
- the pressure overinjection system is carried out in a machine comprising a table 1, to which a mold 2 fitted with a cylindrical cavity is fixed. 3, in which the paper is adjusted as a piston
- JHOJA SUBSTITUTE (RULE 26) " 4 of magnetic plates and a vertical column 5, preferably hydraulically operated, to which end a countermold 6, 7 is fixed.
- the cylindrical cavity 3 of the mold 2 is closed at its bottom, presenting only an adequate set of ejectors 8 therein;
- This cavity 3 has a suitable configuration to form the outer surface of the lower body 9, which constitutes one of the bases of the rotor.
- the countermold is preferably formed by two independent coaxial parts, presenting an internal part 6 that fits exactly in an axial cavity of the sheet package 4 and which, at its end, has a configuration that defines the contrafigura of the lower body 9 or, in other words, its configuration, together with the bottom of the cylindrical cavity 3, defines a space for molding of the lower body 9.
- Its outer part 7, envelops the inner part 6 and forms a second space for molding of the upper ring 10 constituting the other rotor base.
- This part 7 is also provided with an appropriate set of ejectors 11.
- a preferred use automatism is provided, basically consisting of a horizontal platform 12, capable of rotating and moving horizontally, by means of which the presentation of the successive packages is carried out. 4 of plates and the discharge of the rotors already manufactured.
- This automatism allows to reach very high manufacturing rates, especially if you work with machines that comprise two injection heads capable of working alternately or simultaneously.
- SUBSTITUTE SHEET (RULE 26) 1 6 penetrates the axial cavity of the sheet package 4 - exactly which it adjusts - and exceeds it, protruding from the opposite base of the axial cavity, while the outer part of the countermould 7 is pressed against the upper base of the package 4.
- the vertical column 5 rises and, therefore, the sheet metal package 4, which is fixed by simple adjustment to the internal part of the counter mold 6; in this same phase, the platform 12 is removed and first means 13 begin to occupy the active position, by means of which the exact amount of the molten metal (preferably aluminum) to be molded is poured into the cylindrical cavity 3.
- the overmolding process itself takes place.
- phase 5 once the metal that forms the lower body 9, the ring 10 and the bars (not visible in the drawings) solidifies, the ascent movement of the column 5 occurs, thereby, in cooperation with the ejectors 8, the already finished rotor is removed from the cylindrical cavity 3 of the mold 1.
- phase 6 the upward movement of the column 5 continues, producing, by means of a fixed stop ring 14, an axial displacement of the countermould internal 6 with respect to the external countermold 7, with which, ultimately and with the cooperation of the ejectors 11, the total detachment of the already manufactured rotor occurs, which, as can be seen in Figure 7, is finally collected by mobile horizontal platform 12
- Figures 8 to 16 represent the successive phases of a basically identical manufacturing cycle, but intended to obtain a squirrel cage rotor for a conventional type electric motor, that is, with a inner rotor and an outer stator. The cycle takes place basically in the same way as the one already analyzed, with only certain differences in the tools used.
- the bottom of the cylindrical cavity 3 of the mold 2 is not closed, but is axially traversed by a vertical rod 15, axially movable and preferably moved by hydraulic means; from a horizontal step 16, this rod 15 has an end section 15 'of smaller section.
- the countermold 6, 7 is also constituted by two coaxial parts, but the internal part 6 of the countermould, instead of penetrating into the axial cavity of the magnetic sheet pack 4, has an axial cavity 17, in which you can adjust the end section 15 'of the vertical rod 15.
- the platform 12 places the sheet package 4 between the mold 2 and the counter mold 6, 7 placing it exactly in a coaxial position with these elements (figure 8).
- the vertical column 5 descends, so that the package 4 is trapped and immobilized
- the process can be automated, totally or partially, with relative ease, using a combination of known means that are within reach of a suitable technician. level.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97933699A EP0856933A1 (en) | 1996-08-02 | 1997-07-31 | Vertical direct overinjection system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ESP9601738 | 1996-08-02 | ||
ES9601738A ES2120373B1 (es) | 1996-08-02 | 1996-08-02 | Sistema de sobreinyeccion directa vertical. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998006164A1 true WO1998006164A1 (es) | 1998-02-12 |
Family
ID=8295740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ES1997/000198 WO1998006164A1 (es) | 1996-08-02 | 1997-07-31 | Sistema de sobreinyección directa vertical |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0856933A1 (es) |
CA (1) | CA2233607A1 (es) |
ES (1) | ES2120373B1 (es) |
WO (1) | WO1998006164A1 (es) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3866666A (en) * | 1972-10-03 | 1975-02-18 | Prince Corp | Die casting apparatus |
US4362205A (en) * | 1981-02-02 | 1982-12-07 | Hpm Corporation | Rotor die casting method |
US4754801A (en) * | 1985-02-25 | 1988-07-05 | Ube Industries, Ltd. | Die casting method and apparatus therefor |
-
1996
- 1996-08-02 ES ES9601738A patent/ES2120373B1/es not_active Expired - Fee Related
-
1997
- 1997-07-31 EP EP97933699A patent/EP0856933A1/en not_active Ceased
- 1997-07-31 WO PCT/ES1997/000198 patent/WO1998006164A1/es not_active Application Discontinuation
- 1997-07-31 CA CA 2233607 patent/CA2233607A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3866666A (en) * | 1972-10-03 | 1975-02-18 | Prince Corp | Die casting apparatus |
US4362205A (en) * | 1981-02-02 | 1982-12-07 | Hpm Corporation | Rotor die casting method |
US4754801A (en) * | 1985-02-25 | 1988-07-05 | Ube Industries, Ltd. | Die casting method and apparatus therefor |
Also Published As
Publication number | Publication date |
---|---|
ES2120373A1 (es) | 1998-10-16 |
EP0856933A1 (en) | 1998-08-05 |
ES2120373B1 (es) | 1999-05-01 |
CA2233607A1 (en) | 1998-02-12 |
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