WO1995015843A1 - Procede de fabrication de corps d'isolateur pourvus de nervures de blindage - Google Patents

Procede de fabrication de corps d'isolateur pourvus de nervures de blindage Download PDF

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Publication number
WO1995015843A1
WO1995015843A1 PCT/DE1994/001365 DE9401365W WO9515843A1 WO 1995015843 A1 WO1995015843 A1 WO 1995015843A1 DE 9401365 W DE9401365 W DE 9401365W WO 9515843 A1 WO9515843 A1 WO 9515843A1
Authority
WO
WIPO (PCT)
Prior art keywords
shielding ribs
insulator
producing
impressions
insulator body
Prior art date
Application number
PCT/DE1994/001365
Other languages
German (de)
English (en)
Inventor
Rüdiger Giese
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE4342513A external-priority patent/DE4342513C1/de
Priority claimed from DE4417858A external-priority patent/DE4417858A1/de
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1995015843A1 publication Critical patent/WO1995015843A1/fr

Links

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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/021—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing of profiled articles, e.g. hollow or tubular articles, beams
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
    • B29C59/043—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts for profiled articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/14—Supporting insulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor

Definitions

  • the invention relates to a method for producing an insulator body with shielding ribs.
  • Such insulator bodies are cast, for example, from porcelain or epoxy resin.
  • porcelain or epoxy resin For example, it is also known from the technical article "History and Bibliography of Polymeric Insulators for outdoor applications” (IEEE Transactions on Power Delivery, Vol. 8 Nov. 1, Jan. 1993, p. 376 ff) that porcelain umbrella ribs fit onto one Epoxy resin body can be applied.
  • the invention is therefore based on the object of creating an isolator body of the type mentioned at the outset, which is simple and inexpensive to produce.
  • the object is achieved in that an essentially cylindrical body is first produced from an insulating material and that the body is then provided with radial impressions on the circumference to form shielding ribs.
  • the body can advantageously be produced by extrusion.
  • the insulator body can be extruded in a cylindrical or hollow cylindrical shape with a given diameter, which is followed, for example, directly behind the extruder nozzle in in the area in which the extruded body is still soft, impressions are introduced on the circumference of the body by means of radially acting tools. These impressions can be designed so that circumferential shielding ribs are formed on the circumference of the extruded body, as are known, for example, from porcelain insulators.
  • the insulator bodies can be used, for example, as housings for surge arresters or other electrical devices or as support insulators, for example for solid-state high-voltage lines.
  • the shielding ribs can be shaped as circumferential shielding ribs or as pine cone-like scales on the circumference of the insulator body. It is important that, on the one hand, the provision of shielding ribs extends creepage distances on the surface of the insulator body, and, on the other hand, that rainwater-protected areas are created which are advantageously also protected from the strong effects of sunlight and other environmental influences.
  • An advantageous embodiment of the invention provides that the impressions are introduced into the body as long as the body is still at such a high temperature after extrusion that it is easily permanently deformable.
  • the tools which are used to introduce the impressions are heated.
  • the insulator body is advantageously provided with a silicone rubber layer on the outside after the shielding ribs have been introduced.
  • This silicone rubber layer protects particularly well against moisture and exposure to UV radiation.
  • a further advantageous embodiment of the invention provides that the body is provided with radial impressions on the circumference by rolling off at least one rolling tool pressed against the body.
  • the rolling tools can, for example, be rotatably attached to a ring which coaxially surrounds the body and which can itself be rotated about the longitudinal axis of the body.
  • the ring can move with respect to the longitudinal axis of the body during the rolling of the rolling tools, if the latter is produced by extrusion and is processed shortly after the extrusion and then moves back to form the following shielding ribs.
  • the invention also relates to an insulator body, produced by a method as explained above, which consists of a plastic, in particular PVC.
  • Such a plastic is particularly easy to work with, is inexpensive and, due to its low weight, is easy to transport.
  • an insulator is not as fragile as a porcelain body.
  • An art Fabric insulator is therefore particularly insensitive to arbitrary attempts to destroy it (vandalism).
  • scales can advantageously be formed by the radial impressions on the circumference of the body in a pine cone-like structure.
  • FIG. 1 schematically shows a device for carrying out the method according to the invention and an insulator body produced by the method
  • Figure 2 shows schematically an embossing tool.
  • FIG. 3 shows an insulator body with scales similar to pine cones.
  • FIG. 4 shows a device similar to that from FIG. 1 with rolling tools
  • Figure 5 shows the rolling tools in detail
  • Figure 6 shows schematically a roller.
  • Figure 1 shows in schematic form an extruder 1, from the nozzle 2, a cylindrical strand 3 is pressed.
  • the extruded strand 2 After leaving the nozzle, the extruded strand 2 passes through stamping tools 4, which are shown in stylized form and which repeatedly move radially inward towards and away from the strand-shaped body as it passes through it. As a result, radial impressions are produced in the strand-like body, which lead to the formation of circumferential shielding ribs 6, provided that the embossing tools 4 are of cylindrical symmetry, as shown in FIG. 2. There, the embossing tools 4 consist of four embossing dies, which move radially centrally with respect to one another during the embossing process and thereby form a closed ring.
  • the ring formed by the stamping tools 4 is, for example, wedge-shaped in cross section.
  • a cutting tool 5 is then used to cut the strand-like body to suitable intervals.
  • Embossing tools can also be provided which do not act in a cylinder-symmetrical manner on the strand-like body 3, but instead introduce individual notches in the strand-like body 3, as shown for example in FIG. 3.
  • a pine cone-like structure is then formed with partially overlapping, non-circumferential shielding ribs 7.
  • circumferential shielding ribs the creepage distance for electrical charges along the insulator is lengthened and the interior of the insulator is protected from moisture and other environmental influences.
  • FIG. 4 schematically shows an extruder 1, from whose nozzle 2 a cylindrical strand 3 is pressed.
  • the extruded strand passes through 2 stamping tools 4a in the form of rolling tools, which are shown in a stylized manner in FIG.
  • this is essentially a ring 9 with struts 10 projecting radially inward from it, each of which has a bearing for an axis 11 of a shaft which can be displaced radially with respect to the ring 9 Roll 12 have.
  • the rollers 12 are rotatably supported and, for example, are pressed radially inward with respect to the ring 9 onto the cylindrical strand 3, which is coaxially surrounded by the ring 9, for example by means of one each not shown.
  • the individual rollers 12 are provided with an acute-angled outer contour which allows narrow grooves to be pressed in to form shielding ribs 6.
  • the individual rollers 12 can be retracted radially outward and the ring 9 can be moved to the position of the next screen rib to be stamped in relation to the cylindrical strand 3.
  • the ring 9 can be moved with the cylindrical strand 3 to a certain extent in the extrusion direction.
  • the ring 9 can either be continuously rotated in the same direction or rotated 120 ° in one direction and then back again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insulators (AREA)
  • Insulating Bodies (AREA)

Abstract

Selon un procédé de fabrication d'un corps (8) d'isolateur pourvu de nervures de blindage (6, 7), on extrude premièrement un corps cylindrique (3) en un matériau isolant puis on façonne des créneaux radiaux sur le corps extrudé (3) afin de former les nervures de blindage (6, 7).
PCT/DE1994/001365 1993-12-09 1994-11-11 Procede de fabrication de corps d'isolateur pourvus de nervures de blindage WO1995015843A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEP4342513.5 1993-12-09
DE4342513A DE4342513C1 (de) 1993-12-09 1993-12-09 Verfahren zur Herstellung eines Isolatorkörpers mit Schirmrippen
DE4417858A DE4417858A1 (de) 1994-05-18 1994-05-18 Verfahren zur Herstellung eines Isolatorkörpers mit Schirmrippen
DEP4417858.1 1994-05-18

Publications (1)

Publication Number Publication Date
WO1995015843A1 true WO1995015843A1 (fr) 1995-06-15

Family

ID=25932038

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1994/001365 WO1995015843A1 (fr) 1993-12-09 1994-11-11 Procede de fabrication de corps d'isolateur pourvus de nervures de blindage

Country Status (1)

Country Link
WO (1) WO1995015843A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0980747A3 (fr) * 1998-08-14 2001-06-27 Newell Operating Company Procédé et dispositif pour réaliser le motif décoratif d'un applicateur de peinture liquide
US6539999B2 (en) * 2001-02-19 2003-04-01 Newell Operating Company Apparatus and method for making variable paint roller covers

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH301918A (de) * 1951-07-21 1954-09-30 Siemens Ag Freiluftisolator.
FR2091129A5 (fr) * 1970-05-04 1972-01-14 Du Pont Canada
FR2523361A1 (fr) * 1982-03-15 1983-09-16 Ceraver Procede de fabrication d'un revetement isolant a profil cannele sur un support cylindrique, et dispositif de mise en oeuvre du procede
EP0123487A2 (fr) * 1983-04-18 1984-10-31 Dow Corning Corporation Procédé pour l'amélioration des isolateurs de haute tension et composition appropriée

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH301918A (de) * 1951-07-21 1954-09-30 Siemens Ag Freiluftisolator.
FR2091129A5 (fr) * 1970-05-04 1972-01-14 Du Pont Canada
FR2523361A1 (fr) * 1982-03-15 1983-09-16 Ceraver Procede de fabrication d'un revetement isolant a profil cannele sur un support cylindrique, et dispositif de mise en oeuvre du procede
EP0123487A2 (fr) * 1983-04-18 1984-10-31 Dow Corning Corporation Procédé pour l'amélioration des isolateurs de haute tension et composition appropriée

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0980747A3 (fr) * 1998-08-14 2001-06-27 Newell Operating Company Procédé et dispositif pour réaliser le motif décoratif d'un applicateur de peinture liquide
US6539999B2 (en) * 2001-02-19 2003-04-01 Newell Operating Company Apparatus and method for making variable paint roller covers

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