FR2924972A1 - Thermosetting plastic substrate's part i.e. emblem, molding method for door panel of motor vehicle, involves adjusting temperature in zone such that insert and substrate attain temperature only at place of interface to weld insert on part - Google Patents

Thermosetting plastic substrate's part i.e. emblem, molding method for door panel of motor vehicle, involves adjusting temperature in zone such that insert and substrate attain temperature only at place of interface to weld insert on part Download PDF

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Publication number
FR2924972A1
FR2924972A1 FR0759791A FR0759791A FR2924972A1 FR 2924972 A1 FR2924972 A1 FR 2924972A1 FR 0759791 A FR0759791 A FR 0759791A FR 0759791 A FR0759791 A FR 0759791A FR 2924972 A1 FR2924972 A1 FR 2924972A1
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FR
France
Prior art keywords
mold
substrate
insert
zone
temperature
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
Application number
FR0759791A
Other languages
French (fr)
Other versions
FR2924972B1 (en
Inventor
Hugo Piccin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Faurecia Interieur Industrie SAS
Original Assignee
Faurecia Interieur Industrie SAS
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Filing date
Publication date
Application filed by Faurecia Interieur Industrie SAS filed Critical Faurecia Interieur Industrie SAS
Priority to FR0759791A priority Critical patent/FR2924972B1/en
Publication of FR2924972A1 publication Critical patent/FR2924972A1/en
Application granted granted Critical
Publication of FR2924972B1 publication Critical patent/FR2924972B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/52—Heating or cooling
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/022—Particular heating or welding methods not otherwise provided for
    • B29C65/028—Particular heating or welding methods not otherwise provided for making use of inherent heat, i.e. the heat for the joining comes from the moulding process of one of the parts to be joined
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/32—Induction
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/305—Decorative or coloured joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/348—Avoiding melting or weakening of the zone directly next to the joint area, e.g. by cooling
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/474—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7394—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81425—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being stepped, e.g. comprising a shoulder
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B29C66/81811—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8182—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects
    • B29C66/81821—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects of the welding jaws
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91441—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time
    • B29C66/91443—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time following a temperature-time profile
    • B29C66/91445—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time following a temperature-time profile by steps
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
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    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
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    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
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    • B29C66/81423—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
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    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
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    • B29K2905/10—Copper
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    • B29L2031/3005—Body finishings
    • B29L2031/3014—Door linings

Abstract

The method involves arranging a thermoplastic insert (4) at solid state, in an opening (5), and a thermosetting plastic substrate (2.1) inside a mold to permit the substrate to cover the insert. The mold is closed by maintaining the mold under pressure to provide desired shape to the substrate. A mold temperature is locally adjusted in an adjusted zone (7) situated around the insert such that the insert and the substrate attain a melting temperature only at a place of an interface (17) between the insert and the substrate to weld the insert on a part to be molded i.e. emblem, of the substrate. The adjusted zone is made of thermally conductive material i.e. copper. An independent claim is also included for a mold comprising a lower semi-mold.

Description

Procédé de mise en forme permettant le soudage d'une pièce rapportée sur une pièce à mouler [0001]. La présente invention concerne un procédé de moulage d'une pièce plastique. L'invention a notamment pour but d'effectuer simultanément le moulage de la pièce plastique et le soudage d'une pièce rapportée en thermoplastique sur la pièce plastique à mouler. Shaping process for welding an insert to a molding [0001]. The present invention relates to a method of molding a plastic part. The object of the invention is in particular to carry out at the same time the molding of the plastic part and the welding of a thermoplastic insert to the plastic part to be molded.

[0002]. L'invention trouve une application particulièrement avantageuse, mais non exclusive, pour souder des pièces thermoplastiques sur un médaillon de porte de véhicule automobile lors du moulage dudit médaillon. [0003]. Dans les procédés de moulage classiques, on dispose à l'intérieur d'un moule un matériau thermodurcissable ou thermoplastique, de matériau pouvant être associé à des fibres naturelles. La forme désirée est imposée au matériau en fermant le moule qui met sous pression le matériau. [0002]. The invention finds a particularly advantageous, but not exclusive, application for welding thermoplastic parts on a motor vehicle door medallion during the molding of said medallion. [0003]. In conventional molding processes, there is inside a mold a thermosetting or thermoplastic material, material that can be associated with natural fibers. The desired shape is imposed on the material by closing the mold which pressurizes the material.

[0004]. On rappelle qu'un matériau thermodurcissable perd définitivement toute plasticité sous l'effet de la chaleur en prenant sa forme définitive dès la première montée en température, tandis qu'un matériau thermoplastique peut fondre ou ramollir sous l'effet de la chaleur sans que ses propriétés soient largement modifiées et ainsi faire l'objet de plusieurs moulages successifs. [0005]. Suivant la nature du matériau, le moule est chauffé ou non. En effet, dans le cas d'un matériau thermoplastique, le matériau est chauffé avant d'être disposé à l'intérieur d'un moule froid. Alors que dans le cas d'un matériau thermodurcissable, le moule chauffe le matériau disposé à l'intérieur afin de le polymériser. [0006]. Dans l'état de la technique, pour attacher une pièce rapportée en thermoplastique (obtenue par exemple par injection) à une pièce thermoformée obtenue par moulage, on colle la pièce rapportée sur la pièce thermoformée après l'étape de moulage de la pièce thermoformée. [0004]. It is recalled that a thermosetting material permanently loses all plasticity under the effect of heat in its final form from the first rise in temperature, while a thermoplastic material can melt or soften under the effect of heat without its properties are largely modified and thus be the subject of several successive moldings. [0005]. Depending on the nature of the material, the mold is heated or not. Indeed, in the case of a thermoplastic material, the material is heated before being placed inside a cold mold. While in the case of a thermosetting material, the mold heats the material disposed therein to polymerize it. [0006]. In the state of the art, to attach a thermoplastic insert (obtained for example by injection) to a thermoformed part obtained by molding, the insert is glued to the thermoformed part after the molding step of the thermoformed part.

[0007]. Toutefois, d'un point de vue économique, il serait avantageux de pouvoir effectuer en même temps le moulage du matériau disposé dans le moule pour obtenir la pièce thermoformée, appelé substrat, et le soudage de la pièce rapportée sur la pièce thermoformée. [0007]. However, from an economic point of view, it would be advantageous to be able to perform at the same time the molding of the material arranged in the mold to obtain the thermoformed part, called substrate, and the welding of the insert on the thermoformed part.

[0008]. Ce soudage pourrait être effectué par fusion des matériaux à l'endroit de l'interface entre le substrat et la pièce rapportée, à l'intérieur du moule, comme décrit dans les documents JP-8229966 et JP-2003181933. [0008]. This welding could be done by melting the materials at the interface between the substrate and the insert, inside the mold, as described in JP-8229966 and JP-2003181933.

[0009]. Toutefois, la température recommandée pour effectuer le moulage du substrat et la température recommandée pour la fusion à l'interface entre le substrat et la pièce rapportée peuvent être sensiblement incompatibles. En particulier, la température recommandée pour effectuer le moulage risque d'engendrer la déformation de la pièce rapportée. [0009]. However, the recommended temperature for molding the substrate and the temperature recommended for melting at the interface between the substrate and the insert may be substantially inconsistent. In particular, the recommended temperature to perform the molding may cause deformation of the insert.

[00010]. Il existe donc le besoin d'un procédé permettant simultanément le moulage du substrat et le soudage de la pièce rapportée sur le substrat tout en évitant la déformation de la pièce rapportée. [00011]. L'invention comble notamment ce besoin en proposant un moule présentant des ouvertures destinées à recevoir les pièces thermoplastiques rapportées, des zones régulées en température à une température différente de celle du reste du moule étant ménagées autour de ces ouvertures. [00010]. There is therefore a need for a method for simultaneously molding the substrate and welding the insert on the substrate while avoiding deformation of the insert. [00011]. The invention particularly fulfills this need by providing a mold having openings for receiving thermoplastic parts reported, temperature controlled zones at a temperature different from that of the rest of the mold being formed around these openings.

[00012]. Suivant la nature du matériau à thermoformer, la zone est régulée soit en chaud de manière à présenter une température supérieure à la température du moule, soit en froid de manière à présenter une température inférieure à la température du moule. Dans les deux cas, la pièce rapportée est maintenue à une température telle qu'elle ne se déforme pas et que l'interface entre le substrat et la pièce rapportée puisse atteindre la température de fusion des deux matériaux. [00012]. Depending on the nature of the material to be thermoformed, the zone is regulated either hot so as to have a temperature above the temperature of the mold, or cold so as to have a temperature below the temperature of the mold. In both cases, the insert is maintained at a temperature such that it does not deform and that the interface between the substrate and the insert can reach the melting temperature of the two materials.

[00013]. Ainsi, lors du moulage d'une pièce thermodurcissable, on refroidit la zone régulée par rapport au reste du moule en la maintenant par exemple à une température comprise entre 120 et 170 degrés alors que le reste du moule présente une température de l'ordre de 200 degrés. Dans cette mise en oeuvre, le soudage se produit en fin de cycle de moulage lorsqu'une énergie suffisante a été apportée à l'interface entre les matériaux pour qu'ils puissent entrer en fusion. [00013]. Thus, during the molding of a thermosetting part, the controlled zone is cooled relative to the remainder of the mold, for example keeping it at a temperature of between 120 and 170 degrees, while the remainder of the mold has a temperature in the range of 200 degrees. In this implementation, the welding occurs at the end of the molding cycle when sufficient energy has been supplied to the interface between the materials so that they can melt.

[00014]. A cet effet, la zone régulée est délimitée par des barrières thermiques qui isolent thermiquement la zone régulée du reste du moule. En outre, un fluide de refroidissement parcoure la zone régulée afin d'en extraire des calories pour la refroidir. [00014]. For this purpose, the regulated zone is delimited by thermal barriers which thermally isolate the regulated zone from the rest of the mold. In addition, a coolant flows through the regulated area to extract calories for cooling.

[00015]. En revanche, lors du moulage d'une pièce thermoplastique, on chauffe la zone régulée par rapport au reste du moule en la maintenant à une température comprise entre 20 et 170°C, alors que le reste du moule présente une température de l'ordre de 20°C. [00015]. On the other hand, during the molding of a thermoplastic part, the controlled zone is heated with respect to the remainder of the mold while maintaining it at a temperature of between 20 and 170 ° C., whereas the rest of the mold has a temperature of the order of 20 ° C.

[00016]. A cet effet, la zone régulée est délimitée par des barrières thermiques qui isolent la zone régulée du reste du moule. Des inducteurs positionnés autour de la zone régulée permettent de chauffer par induction ladite zone régulée. [00016]. For this purpose, the regulated zone is delimited by thermal barriers which isolate the regulated zone from the rest of the mold. Inductors positioned around the regulated zone are used to inductively heat said regulated zone.

[00017]. L'invention concerne donc un procédé de moulage d'un substrat plastique au moyen d'un moule comportant deux demi-moules caractérisé en ce qu'il comporte les étapes suivantes : - on dispose au moins une pièce rapportée en thermoplastique à l'état solide à l'intérieur d'une ouverture ménagée dans un des demi-moules, - on dispose le substrat à l'intérieur du moule de manière que ce substrat recouvre la pièce rapportée, et - on ferme le moule en le maintenant sous pression de manière à imposer la forme souhaitée au substrat, et - on adapte localement la température du moule dans une zone régulée située autour de la pièce rapportée, la température de cette zone régulée étant différente de celle du reste du moule, de sorte que - la pièce rapportée et le substrat puissent atteindre leur température de fusion uniquement à l'endroit de l'interface entre ladite pièce rapportée et le substrat afin de permettre le soudage de la pièce rapportée sur le substrat, - tout en évitant la déformation de ladite pièce rapportée. [00018]. Selon une mise en oeuvre, le substrat étant un plastique thermodurcissable, on chauffe l'ensemble du moule lors de l'opération de moulage afin de polymériser le substrat, et on refroidit la zone régulée par rapport au reste du moule. [00019]. Selon une mise en oeuvre, on chauffe l'ensemble du moule à une température d'environ 200°C, et on maintient la zone régulée à une température comprise entre 120°C et 170°C. [00017]. The invention therefore relates to a method of molding a plastic substrate by means of a mold comprising two half-molds, characterized in that it comprises the following steps: at least one thermoplastic insert is provided in the state solid inside an opening in one of the half-molds, the substrate is placed inside the mold so that this substrate covers the insert, and the mold is closed by keeping it under pressure. in order to impose the desired shape on the substrate, and - the temperature of the mold is locally adapted in a controlled zone situated around the insert, the temperature of this regulated zone being different from that of the rest of the mold, so that - the workpiece reported and the substrate can reach their melting temperature only at the interface between said insert and the substrate to allow welding of the insert to the substrate. t, - while avoiding the deformation of said insert. [00018]. According to one embodiment, the substrate being a thermosetting plastic, the entire mold is heated during the molding operation in order to polymerize the substrate, and the controlled zone is cooled relative to the remainder of the mold. [00019]. In one embodiment, the entire mold is heated to a temperature of about 200 ° C, and the controlled zone is maintained at a temperature between 120 ° C and 170 ° C.

[00020]. Selon une mise en oeuvre, pour refroidir la zone régulée, on délimite cette zone régulée au moyen de barrières thermiques afin de l'isoler thermiquement du reste du moule et on en extrait des calories en faisant circuler un liquide de refroidissement. [00020]. According to one embodiment, to cool the controlled zone, this controlled zone is delimited by means of heat barriers in order to thermally isolate it from the rest of the mold and heat is extracted by circulating a cooling liquid.

[00021]. Selon une mise en oeuvre, le substrat étant un plastique thermoplastique chauffé avant d'être disposé dans le moule, on refroidit le moule lors de l'opération de moulage afin de solidifier le substrat, et on chauffe la zone régulée par rapport au reste du moule. [00021]. According to one embodiment, the substrate being a heated thermoplastic plastic before being placed in the mold, the mold is cooled during the molding operation in order to solidify the substrate, and the regulated zone is heated with respect to the rest of the mold. mold.

[00022]. Selon une mise en oeuvre, on refroidit l'ensemble du moule à une température d'environ 20°C, et on maintient la zone régulée à une température comprise entre 20°C et 170°C. [00022]. In one embodiment, the entire mold is cooled to a temperature of about 20 ° C, and the controlled zone is maintained at a temperature of between 20 ° C and 170 ° C.

[00023]. Selon une mise en oeuvre, pour chauffer la zone régulée, on 20 délimite la zone régulée au moyen de barrières thermiques et on chauffe par induction cette zone régulée. [00023]. According to one embodiment, to heat the regulated zone, the regulated zone is delimited by means of thermal barriers and this regulated zone is heated by induction.

[00024]. L'invention concerne en outre un moule destiné au moulage d'un substrat plastique comportant : - un demi-moule inférieur et un demi-moule supérieur, 25 - une cavité ménagée dans un des demi-moules destinée à accueillir une pièce rapportée en thermoplastique à l'état solide, et -une zone régulée située autour de la cavité, la température de cette zone étant différente de celle du reste du moule, de sorte que - la pièce rapportée et le substrat puissent atteindre leur température de fusion uniquement à l'endroit de l'interface entre ladite pièce rapportée et le substrat afin de permettre le soudage de la pièce rapportée sur le substrat, - tout en évitant la déformation de ladite pièce rapportée. [00024]. The invention further relates to a mold for molding a plastic substrate comprising: - a lower half-mold and an upper half-mold, 25 - a cavity formed in one of the half-molds for receiving a thermoplastic insert in the solid state, and a controlled zone situated around the cavity, the temperature of this zone being different from that of the remainder of the mold, so that the insert and the substrate can reach their melting temperature only at the the location of the interface between said insert and the substrate to allow welding of the insert to the substrate, while avoiding the deformation of said insert.

[00025]. Selon une réalisation, le moule comporte des barrières thermiques délimitant la zone régulée pour isoler thermiquement la zone régulée du reste du moule. [00025]. According to one embodiment, the mold comprises thermal barriers delimiting the controlled zone to thermally isolate the controlled zone from the rest of the mold.

[00026]. Selon une réalisation, les barrières thermiques sont des plaques de type DME. [00026]. In one embodiment, the thermal barriers are DME type plates.

[00027]. Selon une réalisation, le moule étant destiné à mouler un substrat thermodurcissable, le moule comporte des moyens pour chauffer le substrat, la zone régulée comportant des moyens, tels qu'un circuit de refroidissement, pour refroidir la pièce rapportée. [00027]. In one embodiment, the mold being intended to mold a thermosetting substrate, the mold comprises means for heating the substrate, the regulated zone comprising means, such as a cooling circuit, for cooling the insert.

[00028]. Selon une réalisation, le moule étant destiné à mouler un substrat thermoplastique, il comporte des moyens pour refroidir le substrat, la zone régulée comportant des moyens, tels que des bobines électriques, pour chauffer la pièce rapportée par induction. [00028]. In one embodiment, the mold being intended to mold a thermoplastic substrate, it comprises means for cooling the substrate, the regulated zone comprising means, such as electric coils, for heating the insert by induction.

[00029]. Selon une réalisation, la zone régulée comporte un matériau thermiquement conducteur. [00029]. In one embodiment, the controlled zone comprises a thermally conductive material.

[00030]. Selon une réalisation, le matériau thermiquement conducteur contient du cuivre. [00030]. In one embodiment, the thermally conductive material contains copper.

[00031]. L'invention sera mieux comprise à la lecture de la description qui suit et à l'examen des figures qui l'accompagnent. Ces figures ne sont données qu'à titre illustratif mais nullement limitatif de l'invention. Elles montrent : [00032]. Figure 1 : une vue de côté d'un moule selon l'invention permettant de mouler un matériau thermodurcissable tout en soudant une pièce rapportée sur la pièce moulée ; [00033]. Figures 2a-2c : des représentations schématiques des étapes du procédé selon l'invention mis en oeuvre au moyen du moule de la figure 1 ; [00031]. The invention will be better understood on reading the description which follows and on examining the figures which accompany it. These figures are given for illustrative but not limiting of the invention. They show: [00032]. Figure 1 is a side view of a mold according to the invention for molding a thermosetting material while welding an insert on the molded part; [00033]. Figures 2a-2c: schematic representations of the steps of the method according to the invention implemented by means of the mold of Figure 1;

[00034]. Figure 2d : une représentation schématique de la pièce obtenue à l'issue des étapes des figures 2a-2c ; [00035]. Figure 3: une représentation d'un moule selon l'invention permettant de mouler un matériau thermoplastique tout en soudant une pièce rapportée sur la pièce moulée ; [00034]. Figure 2d: a schematic representation of the part obtained at the end of the steps of Figures 2a-2c; [00035]. Figure 3: a representation of a mold according to the invention for molding a thermoplastic material while welding an insert on the molded part;

[00036]. Figures 4a-4c : des représentations schématiques des étapes du procédé selon l'invention mis en oeuvre au moyen du moule de la figure 3 ; [00037]. Figure 4d : une représentation schématique de la pièce obtenue à l'issue des étapes des figures 4a-4c. [00036]. Figures 4a-4c: schematic representations of the steps of the method according to the invention implemented by means of the mold of Figure 3; [00037]. Figure 4d: a schematic representation of the part obtained at the end of the steps of Figures 4a-4c.

[00038]. Les éléments identiques conservent la même référence d'une figure à l'autre. [00038]. Identical elements retain the same reference from one figure to another.

[00039]. La figure 1 montre une vue en coupe d'un moule 1 selon l'invention comportant un demi-moule inférieur 1.1 et un demi-moule 1.2 supérieur. Ce moule 1 est utilisé pour mouler un substrat 2.1 thermodurcissable et souder simultanément sur la pièce moulée une pièce rapportée 4 en thermoplastique à l'état solide obtenue préalablement par injection ou par thermoformage. [00039]. FIG. 1 shows a sectional view of a mold 1 according to the invention comprising a lower half-mold 1.1 and an upper half-mold 1.2. This mold 1 is used to mold a thermosetting substrate 2.1 and simultaneously weld on the molded part an insert 4 made of thermoplastic in the solid state obtained beforehand by injection or by thermoforming.

[00040]. Dans une mise en oeuvre, la pièce à mouler est un médaillon appartenant à un panneau de porte d'un véhicule automobile tandis que la pièce 4 à souder sur ce médaillon est un insert thermoplastique. [00040]. In one embodiment, the molding is a medallion belonging to a door panel of a motor vehicle while the part 4 to be welded on this medallion is a thermoplastic insert.

[00041]. Plus précisément, pour polymériser le substrat 2.1, le moule 1 est parcouru par un liquide chaud, tel que de l'huile chaude, qui circule à l'intérieur d'un réseau de canalisations 6 ménagé à l'intérieur des demi- moules 1.1 et 1.2. [00042]. Par ailleurs, le demi-moule inférieur 1.1 comporte une cavité 5 destinée à accueillir la pièce rapportée 4. Ce demi-moule 1.1 comporte une zone régulée 7 située autour de la cavité 5, cette zone régulée 7 étant délimitée par des barrières thermiques 8. [00041]. More specifically, to polymerize the substrate 2.1, the mold 1 is traversed by a hot liquid, such as hot oil, which circulates inside a pipe network 6 formed inside the half-molds 1.1 and 1.2. [00042]. Furthermore, the lower half-mold 1.1 comprises a cavity 5 intended to receive the insert 4. This half-mold 1.1 comprises a controlled zone 7 situated around the cavity 5, this regulated zone 7 being delimited by thermal barriers 8.

[00043]. Ces barrières thermiques 8 permettent d'isoler thermiquement la zone régulée 7 du reste du moule 1 chauffé. Ces barrières thermiques 8 peuvent par exemple être des plaques de DME (résine thermodurcissable) thermiquement isolantes. [00043]. These thermal barriers 8 make it possible to thermally isolate the regulated zone 7 from the rest of the heated mold 1. These thermal barriers 8 may for example be thermally hardenable DME (thermosetting resin) plates.

[00044]. Par ailleurs, la zone régulée 7 est parcourue par un fluide de refroidissement qui circule à l'intérieur d'un réseau de canalisations 10 10 ménagé à l'intérieur de la zone régulée 7. [00044]. Furthermore, the regulated zone 7 is traversed by a cooling fluid circulating inside a pipe network 10 formed inside the regulated zone 7.

[00045]. En outre, de préférence, la zone régulée 7 contient un matériau thermiquement conducteur, tel que du cuivre, afin que le liquide de refroidissement puisse extraire le maximum de chaleur de la zone 7. La zone régulée 7 présente ainsi en coupe une structure feuilletée barrière 15 thermique/matériau conducteur/barrière thermique. [00045]. In addition, preferably, the controlled zone 7 contains a thermally conductive material, such as copper, so that the cooling liquid can extract the maximum amount of heat from the zone 7. The regulated zone 7 thus has a barrier laminated structure in section. Thermal / conductive material / thermal barrier.

[00046]. Pour mouler le substrat 2.1 et souder simultanément la pièce rapportée 4 sur la pièce moulée, on effectue les étapes suivantes. [00046]. To mold the substrate 2.1 and simultaneously weld the insert 4 on the molded part, the following steps are carried out.

[00047]. Tout d'abord, comme représenté sur la figure 2a, la pièce rapportée 4 est positionnée à l'intérieur de la cavité 5, de manière que la 20 surface externe 14 de la pièce 4 se situe sensiblement dans le prolongement de la surface 15 du moule 1, la pièce 4 pouvant s'étendre légèrement au-delà de la surface 15 afin de faciliter la phase de soudage. [00047]. First, as shown in FIG. 2a, the insert 4 is positioned inside the cavity 5, so that the outer surface 14 of the part 4 is substantially in line with the surface 15 of the mold 1, the piece 4 may extend slightly beyond the surface 15 to facilitate the welding phase.

[00048]. Dans une deuxième étape représentée sur la figure 2b, on dispose le substrat 2.1 associé à des fibres naturelles sur le demi-moule 1.1, de 25 manière que ce substrat 2.1 recouvre la surface 14 affleurante de la pièce 4. [00048]. In a second step shown in FIG. 2b, the substrate 2.1 associated with natural fibers is placed on the half-mold 1.1, so that this substrate 2.1 covers the flush surface 14 of the part 4.

[00049]. Dans une troisième étape représentée sur la figure 2c, le moule supérieur 1.2 est descendu et pressé contre le moule inférieur 1.1 de manière à imprimer la forme du moule au substrat 2.1. [00050]. Le moule 1 présente une température de l'ordre de 200°C afin de polymériser le substrat 2.1, tandis que la zone régulée 7 présente une température comprise entre 130 et 170°C. [00049]. In a third step shown in FIG. 2c, the upper mold 1.2 is lowered and pressed against the lower mold 1.1 so as to print the shape of the mold to the substrate 2.1. [00050]. The mold 1 has a temperature of about 200 ° C to polymerize the substrate 2.1, while the controlled zone 7 has a temperature between 130 and 170 ° C.

[00051]. La température de l'interface 17 entre le substrat 2.1 et la pièce rapportée 4 est adaptée afin de permettre la fusion du substrat 2.1 et de la pièce rapportée 4 uniquement à l'endroit dudit interface 17, tout en évitant la déformation de la pièce 4. [00051]. The temperature of the interface 17 between the substrate 2.1 and the insert 4 is adapted to allow the melting of the substrate 2.1 and the insert 4 only at the location of said interface 17, while avoiding the deformation of the part 4 .

[00052]. La fusion à l'interface 17 des matériaux de la pièce à mouler 2.1 et de la pièce rapportée 4 est observable en fin du cycle de moulage lorsque le substrat 2.1 est suffisamment polymérisé pour que la réticulation du substrat à l'interface 17 puisse se réaliser. [00052]. The fusion at the interface 17 of the materials of the molding part 2.1 and the insert 4 is observable at the end of the molding cycle when the substrate 2.1 is sufficiently polymerized so that the crosslinking of the substrate at the interface 17 can be realized .

[00053]. Une fois la cuisson du substrat 2.1 effectuée, la pièce obtenue est retirée du moule 1. Cette pièce, représentée sur la figure 2d, comporte un insert 4 intégré dans la pièce moulée en forme de médaillon. [00054]. En variante, la cavité 5 et la zone régulée 7 sont ménagés dans le demi-moule supérieur 1.2 et/ou les demi-moules 1.1, 1.2 sont chauffés par un système à induction. [00053]. Once the substrate 2.1 has been fired, the part obtained is removed from the mold 1. This part, shown in FIG. 2d, comprises an insert 4 integrated in the medallion-shaped molded part. [00054]. Alternatively, the cavity 5 and the regulated zone 7 are formed in the upper half-mold 1.2 and / or the half-molds 1.1, 1.2 are heated by an induction system.

[00055]. La figure 3 montre une réalisation d'un moule 1 permettant de mouler un substrat 2.2 thermoplastique et souder simultanément sur la pièce moulée une pièce rapportée 4 en thermoplastique à l'état solide obtenue préalablement par injection ou par thermoformage. [00055]. FIG. 3 shows an embodiment of a mold 1 making it possible to mold a thermoplastic substrate 2.2 and simultaneously weld onto the molded part an insert 4 made of thermoplastic in the solid state obtained beforehand by injection or by thermoforming.

[00056]. Dans cette réalisation, les demi-moules 1.1 et 1.2 présentent la même structure que ceux de la figure 1 à l'exception du fait que le réseau de canalisations 6 est remplacé par un circuit de canalisations 18 parcouru par un liquide de refroidissement afin de refroidir le moule 1. [00056]. In this embodiment, the half-molds 1.1 and 1.2 have the same structure as those of FIG. 1 with the exception that the pipe network 6 is replaced by a pipe circuit 18 traversed by a cooling liquid to cool the mold 1.

[00057]. En outre, le réseau de canalisations 10 est remplacé par des bobines 19 de chauffage par induction positionnées autour de la zone régulée 7, à la surface du moule 1, afin de chauffer par induction la zone régulée 7. [00057]. In addition, the pipe network 10 is replaced by induction heating coils 19 positioned around the regulated zone 7, on the surface of the mold 1, in order to inductively heat the regulated zone 7.

[00058]. Pour mouler le substrat 2.2 et souder simultanément la pièce rapportée 4 sur la pièce moulée, on effectue les étapes suivantes. [00058]. To mold the substrate 2.2 and simultaneously weld the insert 4 on the molded part, the following steps are carried out.

[00059]. Tout d'abord, dans une étape non représentée, le substrat thermoplastique 2.2 associé à des fibres naturelles est chauffé. [00059]. First, in a step not shown, the thermoplastic substrate 2.2 associated with natural fibers is heated.

[00060]. Comme représenté sur la figure 4a, la pièce rapportée 4 est positionnée à l'intérieur de la cavité 5, de manière que la surface externe 14 de la pièce 4 se situe sensiblement dans le prolongement de la surface 15 du moule 1, la pièce 4 pouvant s'étendre légèrement au-delà de la surface 15 afin de faciliter la phase de soudage. [00060]. As shown in Figure 4a, the insert 4 is positioned inside the cavity 5, so that the outer surface 14 of the part 4 is substantially in line with the surface 15 of the mold 1, the part 4 may extend slightly beyond the surface 15 to facilitate the welding phase.

[00061]. Dans une deuxième étape représentée sur la figure 4b, on dispose le substrat 2.2 chaud sur le demi-moule 1.1, de manière que ce substrat 2.2 recouvre la surface 14 affleurante de la pièce rapportée 4. [00061]. In a second step shown in FIG. 4b, the hot substrate 2.2 is placed on the half-mold 1.1, so that this substrate 2.2 covers the flush surface 14 of the insert 4.

[00062]. Dans une troisième étape représentée sur la figure 4c, le moule supérieur 1.2 est descendu et pressé contre le moule inférieur 1.1 de manière à imprimer la forme du moule au substrat 2.2. [00062]. In a third step shown in Figure 4c, the upper mold 1.2 is lowered and pressed against the lower mold 1.1 so as to print the shape of the mold to the substrate 2.2.

[00063]. Le moule 1 présente une température de l'ordre de 20°C afin de solidifier le substrat 2.2, tandis que la zone régulée 7 présente une température comprise entre 20 et 170°C. [00064]. La température de l'interface 17 entre le substrat 2.2 et la pièce rapportée 4 est adaptée afin de permettre la fusion du substrat 2.2 et de la pièce rapportée 4 uniquement à l'endroit dudit interface 17, tout en évitant la déformation de la pièce rapportée 4. [00063]. The mold 1 has a temperature of the order of 20 ° C to solidify the substrate 2.2, while the controlled zone 7 has a temperature between 20 and 170 ° C. [00064]. The temperature of the interface 17 between the substrate 2.2 and the insert 4 is adapted to allow the fusion of the substrate 2.2 and the insert 4 only at the location of said interface 17, while avoiding the deformation of the insert 4.

[00065]. La fusion à l'interface 17 simultanée des matériaux du substrat 2.2 et de la pièce 4 est observable au début du cycle de moulage lorsque le substrat 2.2 chaud déposé apporte suffisamment d'énergie pour que la fusion des matériaux à l'interface 17 puisse être réalisée. 9 [00066]. Une fois que le substrat 2.2 est solidifié, la pièce obtenue est retirée du moule 1. Cette pièce, représentée sur la figure 4d, comporte un insert 4 intégré dans la pièce moulée en forme de médaillon de porte. [00065]. The fusion at the simultaneous interface 17 of the materials of the substrate 2.2 and of the part 4 is observable at the beginning of the molding cycle when the deposited hot substrate 2.2 provides sufficient energy for the melting of the materials at the interface 17 to be able to performed. 9 [00066]. Once the substrate 2.2 is solidified, the piece obtained is removed from the mold 1. This part, shown in Figure 4d, has an insert 4 integrated in the molded piece shaped door medallion.

Claims (8)

REVENDICATIONS 1. Procédé de moulage d'un substrat plastique (2.1, 1. A method of molding a plastic substrate (2.1, 2.2) au moyen d'un moule (1) comportant deux demi-moules (1.1, 1.2) caractérisé en ce qu'il comporte les étapes suivantes : - on dispose au moins une pièce rapportée (4) en thermoplastique à l'état solide à l'intérieur d'une ouverture (5) ménagée dans un des demi-moules (1.1, 1.2), - on dispose le substrat (2.1, 2.2) à l'intérieur du moule (1) de manière que ce substrat (2.1, 2.2) recouvre la pièce rapportée (4), et - on ferme le moule (1) en le maintenant sous pression de manière à imposer la forme souhaitée au substrat (2.1, 2.2), et - on adapte localement la température du moule (1) dans une zone régulée (7) située autour de la pièce rapportée (4), la température de cette zone régulée (7) étant différente de celle du reste du moule (1), de sorte que - la pièce rapportée (4) et le substrat (2.1, 2.2) puissent atteindre leur température de fusion uniquement à l'endroit de l'interface (17) entre ladite pièce rapportée (4) et le substrat (2.1, 2.2) afin de permettre le soudage de la pièce rapportée (4) sur le substrat, - tout en évitant la déformation de ladite pièce rapportée (4). 2. Procédé selon la revendication 1, caractérisé en ce que, le substrat (2.1) étant un plastique thermodurcissable, on chauffe l'ensemble du moule (1) lors de l'opération de moulage afin de polymériser le substrat (2.1, 2.2), et on refroidit la zone régulée (7) par rapport au reste du moule (1). 2.2) by means of a mold (1) comprising two half-molds (1.1, 1.2) characterized in that it comprises the following steps: - there is at least one insert (4) made of thermoplastic in the solid state inside an opening (5) formed in one of the half-molds (1.1, 1.2), the substrate (2.1, 2.2) is arranged inside the mold (1) so that this substrate (2.1 , 2.2) covers the insert (4), and - the mold (1) is kept under pressure so as to impose the desired shape on the substrate (2.1, 2.2), and - the temperature of the mold ( 1) in a controlled zone (7) situated around the insert (4), the temperature of this regulated zone (7) being different from that of the rest of the mold (1), so that - the insert (4) and the substrate (2.1, 2.2) can reach their melting temperature only at the interface (17) between said insert (4) and the substrate (2.1, 2.2) af to allow welding of the insert (4) on the substrate, - while avoiding the deformation of said insert (4). 2. Method according to claim 1, characterized in that, the substrate (2.1) being a thermosetting plastic, the entire mold (1) is heated during the molding operation in order to polymerize the substrate (2.1, 2.2) and the controlled zone (7) is cooled with respect to the remainder of the mold (1). 3. Procédé selon la revendication 2, caractérisé en ce que : - on chauffe l'ensemble du moule (1) à une température d'environ 200°C, et on maintient la zone régulée (7) à une température comprise entre 120°C et 170°C. 3. Method according to claim 2, characterized in that: - the entire mold (1) is heated to a temperature of about 200 ° C, and the controlled zone (7) is maintained at a temperature between 120 ° C and 170 ° C. 4. Procédé selon la revendication 2 ou 3, caractérisé en ce que pour refroidir la zone régulée (7), on délimite cette zone régulée (7) au moyen de barrières thermiques (8) afin de l'isoler thermiquement du reste du moule (1) et on en extrait des calories en faisant circuler un liquide de refroidissement. 4. Method according to claim 2 or 3, characterized in that for cooling the controlled zone (7), this controlled zone (7) is delimited by means of heat barriers (8) in order to thermally isolate it from the rest of the mold ( 1) and calories are extracted by circulating a coolant. 5. Procédé selon la revendication 1, caractérisé en ce que, le substrat (2.2) étant un plastique thermoplastique chauffé avant d'être disposé dans le moule (1), on refroidit le moule (1) lors de l'opération de moulage afin de solidifier le substrat (2.2), et on chauffe la zone régulée (7) par rapport au reste du moule (1). 5. Method according to claim 1, characterized in that, the substrate (2.2) being a heated thermoplastic plastic before being placed in the mold (1), is cooled the mold (1) during the molding operation so to solidify the substrate (2.2), and the regulated zone (7) is heated with respect to the remainder of the mold (1). 6. Procédé selon la revendication 5, caractérisé en ce que on refroidit l'ensemble du moule (1) à une température d'environ 20°C, et on maintient la 10 zone régulée (7) à une température comprise entre 20°C et 170°C. 6. Process according to claim 5, characterized in that the entire mold (1) is cooled to a temperature of approximately 20 ° C, and the controlled zone (7) is maintained at a temperature of between 20 ° C. and 170 ° C. 7. Procédé selon la revendication 5 ou 6, caractérisé en ce que pour chauffer la zone régulée (7), on délimite la zone régulée (7) au moyen de barrières thermiques (8) et on chauffe par induction cette zone régulée (7). 15 7. Method according to claim 5 or 6, characterized in that for heating the regulated zone (7), the controlled zone (7) is delimited by means of thermal barriers (8) and this regulated zone (7) is heated by induction. . 15 8. Moule destiné au moulage d'un substrat (2) plastique comportant : - un demi-moule inférieur (1.1) et un demi-moule supérieur (1.2), - une cavité (5) ménagée dans un des demi-moules (1.1, 1.2) destinée à accueillir une pièce rapportée (4) en thermoplastique à l'état solide, et 20 - une zone régulée (7) située autour de la cavité (5), la température de cette zone (7) étant différente de celle du reste du moule (1), de sorte que - la pièce rapportée (4) et le substrat (2.1, 2.2) puissent atteindre leur température de fusion uniquement à l'endroit de l'interface (17) entre ladite pièce rapportée (4) et le substrat (2.1, 2.2) afin de permettre le soudage de la 25 pièce rapportée (4) sur le substrat, - tout en évitant la déformation de ladite pièce rapportée (4). 13. Moule selon la revendication 8, caractérisé en ce qu'il comporte des barrières thermiques (8) délimitant la zone régulée (7) pour isoler 30 thermiquement la zone régulée (7) du reste du moule (1). 14. Moule selon la revendication 9, caractérisé en ce que les barrières thermiques (8) sont des plaques de type DME. 35 11. Moule selon l'une des revendications 8 à 10, caractérisé en ce quele moule (1) étant destiné à mouler un substrat thermodurcissable (2.1), le moule (1) comporte des moyens (6) pour chauffer le substrat (2.1), la zone régulée (7) comportant des moyens (10), tels qu'un circuit de refroidissement, pour refroidir la pièce rapportée (4). 12. Moule selon l'une des revendications 8 à 11, caractérisé en ce que le moule (1) étant destiné à mouler un substrat thermoplastique (2), il comporte des moyens (18) pour refroidir le substrat (2), la zone régulée (7) comportant des moyens (19), tels que des bobines électriques, pour chauffer la pièce rapportée (4) par induction. 13. Moule selon l'une des revendications 8 à 12, caractérisé en ce que la zone régulée (7) comporte un matériau thermiquement conducteur. 14. Moule selon la revendication 13, caractérisé en ce que le matériau thermiquement conducteur contient du cuivre. 8. Mold for molding a plastic substrate (2) comprising: - a lower half-mold (1.1) and an upper half-mold (1.2), - a cavity (5) formed in one of the half-molds (1.1) 1.2) for receiving a solid state thermoplastic insert (4) and a controlled zone (7) around the cavity (5), the temperature of this zone (7) being different from that from the remainder of the mold (1), so that - the insert (4) and the substrate (2.1, 2.2) can reach their melting point only at the interface (17) between said insert (4). ) and the substrate (2.1, 2.2) to allow welding of the insert (4) to the substrate, while avoiding deformation of said insert (4). 13. Mold according to claim 8, characterized in that it comprises thermal barriers (8) defining the controlled zone (7) to thermally isolate the controlled zone (7) from the rest of the mold (1). 14. Mold according to claim 9, characterized in that the thermal barriers (8) are DME type plates. 11. Mold according to one of claims 8 to 10, characterized in thatthe mold (1) is intended to mold a thermosetting substrate (2.1), the mold (1) comprises means (6) for heating the substrate (2.1). ), the controlled area (7) having means (10), such as a cooling circuit, for cooling the insert (4). 12. Mold according to one of claims 8 to 11, characterized in that the mold (1) is intended to mold a thermoplastic substrate (2), it comprises means (18) for cooling the substrate (2), the area controlled (7) having means (19), such as electric coils, for heating the insert (4) by induction. 13. Mold according to one of claims 8 to 12, characterized in that the controlled zone (7) comprises a thermally conductive material. 14. Mold according to claim 13, characterized in that the thermally conductive material contains copper.
FR0759791A 2007-12-12 2007-12-12 SHAPING METHOD FOR WELDING A REPORTED PART ON A MOLDING PIECE. Active FR2924972B1 (en)

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Publication number Priority date Publication date Assignee Title
WO2014114955A1 (en) * 2013-01-25 2014-07-31 Penso Holdings Ltd Method and apparatus for production of carbon fibre components
EP3789174A1 (en) * 2019-09-05 2021-03-10 Motherson Innovations Company Limited Internal trim component with a three-dimensional shape for a motor vehicle and device and method for producing said type of internal trim component

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US5196151A (en) * 1990-09-11 1993-03-23 Toyoda Gosei Co., Ltd. Method for producing foam base material product with securing device
US5804018A (en) * 1992-06-12 1998-09-08 Donnelly Corporation Method for making vehicular panel assembly
EP1892077A1 (en) * 2006-08-24 2008-02-27 Deutsches Zentrum für Luft- und Raumfahrt e.V. Method and device for producing fibrous composite component

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US5196151A (en) * 1990-09-11 1993-03-23 Toyoda Gosei Co., Ltd. Method for producing foam base material product with securing device
DE4137249C1 (en) * 1991-11-13 1993-02-11 Gurit-Essex Ag, Freienbach, Ch
US5804018A (en) * 1992-06-12 1998-09-08 Donnelly Corporation Method for making vehicular panel assembly
EP1892077A1 (en) * 2006-08-24 2008-02-27 Deutsches Zentrum für Luft- und Raumfahrt e.V. Method and device for producing fibrous composite component

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014114955A1 (en) * 2013-01-25 2014-07-31 Penso Holdings Ltd Method and apparatus for production of carbon fibre components
EP3789174A1 (en) * 2019-09-05 2021-03-10 Motherson Innovations Company Limited Internal trim component with a three-dimensional shape for a motor vehicle and device and method for producing said type of internal trim component

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