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1. WO2008041122 - HEATING ELEMENT, PARTICULARLY FOR HOT RUNNERS OF INJECTION MOULDING APPARATUS OF PLASTIC MATERIAL, AND HOTRUNNER

Publication Number WO/2008/041122
Publication Date 10.04.2008
International Application No. PCT/IB2007/002993
International Filing Date 04.10.2007
IPC
B29C 45/27 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
26Moulds
27Sprue channels
H05B 3/20 2006.01
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
3Ohmic-resistance heating
20Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
H01R 4/30 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
4Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
28Clamped connections; Spring connections
30using a screw or nut clamping member
CPC
B29C 2045/2745
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
26Moulds
27Sprue channels ; Runner channels or runner nozzles
2737Heating or cooling means therefor
2743Electrical heating element constructions
2745Film-like electrical heaters
B29C 2045/2746
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
26Moulds
27Sprue channels ; Runner channels or runner nozzles
2737Heating or cooling means therefor
2743Electrical heating element constructions
2746Multilayered electrical heaters
B29C 2045/275
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
26Moulds
27Sprue channels ; Runner channels or runner nozzles
2737Heating or cooling means therefor
275Planar heating or cooling elements
B29C 2045/2751
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
26Moulds
27Sprue channels ; Runner channels or runner nozzles
2737Heating or cooling means therefor
2751Electrical power supply connections
B29C 45/2737
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
26Moulds
27Sprue channels ; Runner channels or runner nozzles
2737Heating or cooling means therefor
H01R 4/30
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
4Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
28Clamped connections, spring connections
30utilising a screw or nut clamping member
Applicants
  • INGLASS S.P.A. [IT]/[IT] (AllExceptUS)
  • CIRRI, Gianfranco [IT]/[IT] (UsOnly)
  • PRUDENZIATI, Maria [IT]/[IT] (UsOnly)
Inventors
  • CIRRI, Gianfranco
  • PRUDENZIATI, Maria
Agents
  • BUZZI, Franco
Priority Data
MO2006A00031405.10.2006IT
Publication Language English (EN)
Filing Language Italian (IT)
Designated States
Title
(EN) HEATING ELEMENT, PARTICULARLY FOR HOT RUNNERS OF INJECTION MOULDING APPARATUS OF PLASTIC MATERIAL, AND HOTRUNNER
(FR) ÉLÉMENT CHAUFFANT, EN PARTICULIER POUR CANAUX CHAUFFÉS D'APPAREIL DE MOULAGE PAR INJECTION DE MATÉRIAUX PLASTIQUES
Abstract
(EN)
Heating element for apparatuses for injection moulding of plastic material, comprising a plate (1) made of thermally conductive material and characterized by an improved treatment of preparation of the surface of the plate, for neutralizing phenomena of corrosion. Provided on said plate is an integrated heating system (based on the Italian patent application No. IT-A-TO2004A000253 and U.S. patent application No. US-A-2005/0257367), thus rendering the heating element capable of operating at up to 600°C, as well as a possible glazing for sealing the insulating final layer of Al2O3 and by final anti-emissive gold flash. The heating element is likewise equipped with electrical connections that are reliable at high temperatures and with systems of clamping to a hot runner (H) also in the case where the base materials of the plate and the hot runner are different.
(FR)
L'invention concerne un élément chauffant pour appareils de moulage par injection de matériaux plastiques, comprenant une plaque (1) en un matériau thermoconducteur, et caractérisé par un traitement amélioré de préparation de la surface de la plaque, en vue de la neutralisation des phénomènes de corrosion. Ladite plaque présente un système de chauffage intégré (basé sur la demande de brevet Italien No IT-A-TO2004A000253 et la demande de brevet U.S. No US-A-2005/0257367), de manière à rendre l'élément chauffant capable de fonctionner à des températures atteignant 600°C, avec glaçage éventuel pour sceller la couche finale isolante d'Al2O3 et mince revêtement d'or final anti-émissif. L'élément chauffant présente également des connexions électriques qui sont fiables aux températures élevées, ainsi que des systèmes de fixation à un canal chauffé (H), également dans le cas où les matériaux de base de la plaque et du canal chauffé sont différents.
Latest bibliographic data on file with the International Bureau