Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/16—Making multilayered or multicoloured articles
  • B29C45/1671—Making multilayered or multicoloured articles with an insert
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
  • B29C45/14467—Joining articles or parts of a single article
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
  • B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
  • B62D29/041—Understructures
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
  • B29L2031/3002—Superstructures characterized by combining metal and plastics, i.e. hybrid parts

Definitions

• the invention relates to a ner process for the production of Nerbundmaschine consisting of at least one base body and at least one first thermoplastic
• Plastic part and a second thermoplastic plastic part which are connected to the base body by injection molding, the plastic parts being made of different plastic material, by inserting the base body into a multi-component injection molding tool with at least two separate melt-conducting systems and at least two cavities and for the first plastic part and the second plastic part and subsequent simultaneous injection of the different plastics into the cavities.
• a generic ner driving has become known from the document DE 3 503 036 A1, in which a first cavity is first filled with a first thermoplastic material in a first step by means of movable cores and then a further cavity in a second step by withdrawing a movable tool element is released.
• a second plastic component is injected into the remaining cavity and partially connected to the first plastic component.
• a disadvantage of the methods is that these ner drives have a high cycle time.
• the cooling of the first plastic component has to be waited for, otherwise the structure of the first plastic part would be destroyed.
• complex tools with special slides have to be used to implement these processes.
• the object of the invention is to provide a method which avoids the disadvantages of the known methods described above and nevertheless enables a targeted positive connection between the different plastic parts made of different plastics.
• the object is achieved in that, in a method of the type mentioned at the outset, a base body is inserted into an injection mold, which connects the various plastic parts and separates the cavities for the plastic parts from one another by corresponding sealing edges in the mold. This enables a sumultaneous injection of the different plastics into the cavities.
• the invention relates to a method for producing composite parts consisting of at least one base body, preferably made of metal or a high-strength plastic material, particularly preferably made of metal, and at least a first thermoplastic plastic part and a second thermoplastic plastic part, which are connected to the base body by injection molding are, wherein the two plastic parts consist of different plastic material by inserting the base body in a multi-component injection molding tool with at least two separate melt control systems and at least two cavities for the first
• thermoplastic used is preferably a plastic which is selected from the series: polyamide, polyester, polyolefin, in particular styrene copolymer, polycarbonate, polypropylene, polyphenylene sulfide, polyimide, polyvinyl chloride, polyurethane, PSO or PEEK or possible mixtures of the polymers mentioned.
• the preferred object of the invention is to produce a form-fitting connection of one or more plastic parts with the base body, in particular with an edge of the base body, which enables these plastic parts to be displaced on the base body in at least one direction, preferably in the longitudinal direction of the plastic part.
• the plastic part can shrink without hindrance on the base body without hindrance after the plastic composite component has been removed from the mold. Distortion and internal tension can be largely avoided in the composite component.
• a multi-part base body is used, the individual parts of the base body being connected to one another via a thermoplastic plastic part by injection molding.
• the composite parts produced by the method according to the invention can be used as components for the automotive sector, e.g. can be used as a seat structure, door modules, front end parts, sills with a combination of elastic and hard plastic, entry strips, coolers or as housings for household appliances, small electrical appliances and office machines.
• Fig. 1 shows the support structure for the front module of a motor vehicle manufactured by the inventive method.
• Fig. 2 shows a section through the support structure according to Fig. 1 along the line
• FIG. 3 shows a step through the carrying structure according to FIG. 1 according to line B-B in FIG. 1.
• Fig. 4 the same step as Fig. 3, but in this variant
• Edge molding (16) has a Z shape.
• Fig. 5 shows the cross section through a mold during the execution of the method according to the invention.
• FIG. 6 detail from FIG. 5 in the area of the nozzle 33 with the representation of the sealing surfaces 11, 12.
• Fig. 1 shows the support structure for the front module of a motor vehicle consisting of the base body 1 made of sheet steel, two headlight supports 2; 3 made of an unreinforced amorphous thermoplastic material (polycarbonate-ABS mixture), a cooling module carrier 4 made of a glass fiber reinforced thermoplastic (polyamide), a rib structure 5 made of a glass fiber reinforced thermoplastic (polyamide) and a panel 6 made of a glass fiber reinforced thermoplastic (polyamide) ,
• Fig. 2 shows a step through the Grundkö ⁇ er 1, the panel 6, the rib structure 5 and the headlight bracket 3.
• the rib structure 5 and the panel 6 form a unit and are connected to the base body 1.
• the headlamp support 3 is separated from the rib structure 5 via the sealing surfaces 7, 8 on the base body 1, but is connected to the base body 1 in a form-fitting and fixed manner via the extrusion coating 9 and the injection 10.
• the base body 1 is shown openwork to show the shape of the rib structure.
• FIG 3 shows a step through the vertical strut of the base body 1 and horizontally through the headlight support 3 and the cooling module support 4.
• the rib structure 5 is firmly connected to the base body 1. Through the sealing surfaces 11; 14 above and the sealing surfaces 12; 15 below the base body 1, the rib structure is separated from the headlight bracket 3 and the cooling module bracket 4.
• the headlight bracket 3 is positively and firmly connected to the base body via the ribs 17, the web 19, the injection point 18 and the edge molding 13 with injection points.
• the cooling module carrier 4 is positively connected to the basic body 1 via the extrusion coating 16.
• Fig. 4 shows a variant of the component according to Fig. 1 with the same section as in Fig. 3, but with the edge molding 16 having a Z-shape, so that the cooling module carrier is firmly connected to the basic body 1, but a movement of the cooling module carrier is permitted in the longitudinal direction of the edge 16.
• the basic body 1 By closing the injection mold (FIG. 5), the basic body 1 is largely positively received by the contour surface 24 of the injection side and by contour surfaces 25 of the closing side, except for the cavities 22, 23 for the plastics A and B.
• This allows sealing surfaces 7,8 (see FIG. 1); 11, 12 ( Figures 3 and 6); 14, 15 (FIGS. 3 and 4), etc., so that the individual plastics A and B can flow precisely into the provided cavities 22, 23 during the injection process.
• the adjacent injection molding units I and II simultaneously inject the respective plastic quantities for the plastic components A and B.
• the plastic melt A flows through the injection pressure of the injection molding unit I into the hot runner manifold 28 to the hot runner nozzle 29 and into the cold manifold 30 to the mold cavity (cavity) 23.
• the hot runner nozzle could also connect directly to the mold cavity 23.
• the plastic melt B simultaneously flows through the hot runner distributor 31 to the nozzles 32, 33 and from there directly into the cavities 22 or via cold distributors into these cavities.
• the plastic melt is usually filled with a
• the plastic is further cooled by the temperature control system of the injection mold.
• the mold can be opened and the multi-component injection molded part can be removed from the mold.
• a handling device feeds the bowl-shaped basic body, places it on the spray side of the cavity.
• the handling device turns the grippers to the closing side and removes the finished multi-component injection molded part and usually places it on a conveyor belt, whereby e.g. during removal and storage, Sprues can be removed.
• multi-component injection molded parts can be produced in a normal injection molding cycle of 35 seconds to 120 seconds, depending on the size and weight of the article.
• the basic body 1 is provided anyway in the case of lightweight structures. In other cases, a frame part as basic body 1 would have to be injected separately or in a multi-component injection mold in one operation. This would mean an additional operation for the handling device (removal of the finished part and Removing the frame part, swiveling and inserting the frame part, then moving out and putting down the finished part).

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Architecture (AREA)
• Structural Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Injection Moulding Of Plastics Or The Like (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=7673755

Family Applications (1)

Country Status (10)

Families Citing this family (32)

Family Cites Families (10)

• 2001
  • 2001-02-13 DE DE10106458A patent/DE10106458A1/de not_active Withdrawn
• 2002
  • 2002-01-31 BR BR0207203-3A patent/BR0207203A/pt not_active IP Right Cessation
  • 2002-01-31 JP JP2002564112A patent/JP2004526591A/ja active Pending
  • 2002-01-31 RU RU2003127945/12A patent/RU2003127945A/ru not_active Application Discontinuation
  • 2002-01-31 MX MXPA03007200A patent/MXPA03007200A/es unknown
  • 2002-01-31 WO PCT/EP2002/000985 patent/WO2002064343A1/de not_active Application Discontinuation
  • 2002-01-31 EP EP02708322A patent/EP1361943A1/de not_active Withdrawn
  • 2002-01-31 CA CA002437805A patent/CA2437805A1/en not_active Abandoned
  • 2002-01-31 CN CNB028048679A patent/CN1246134C/zh not_active Expired - Fee Related
  • 2002-02-07 US US10/072,366 patent/US6780365B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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