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
  • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
  • B29C45/0055—Shaping
• • 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
  • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
  • B29C45/006—Joining parts moulded in separate cavities
• • 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
  • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/001—Combinations of extrusion moulding with other shaping operations
  • B29C48/0017—Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
• • 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
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
• • 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
  • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
  • B29C53/02—Bending or folding
  • B29C53/08—Bending or folding of tubes or other profiled members
• • 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
  • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
  • B29C53/22—Corrugating

Definitions

• the invention relates to a method for manufacturing a container made of plastic, in which a shell part is manufactured by injection molding and then several shell parts are connected to one another to form the container, the shell parts being produced in one piece with further components.
• brackets or connecting pieces to be arranged on the containers are manufactured by injection molding. Since the brackets usually have reinforcing struts and the connecting pieces are often curved or have undercuts, the shell parts are usually separated in the area of the components or manufactured in injection molds with a plurality of cores. Alternatively, the components can be produced using a lost-core technique.
• a disadvantage of the known method is that it is very cost-intensive to use and only very simple components can be manufactured in one piece with the shell parts. For example, a multiplicity of shell parts or a very complex injection mold with several movable cores are required for the container to be manufactured. Therefore, only very small components are usually made with the shell parts, and large and complex-shaped components are separately manufactured and subsequently attached to the shell parts.
• the invention is based on the problem of further developing a method of the type mentioned at the outset in such a way that the one-piece production of components of almost any design with the shell parts is possible and that it can be used particularly cost-effectively.
• the subsequent shaping of the blanks makes it possible to manufacture very complicated components.
• the process according to the invention can be applied very simply to the manufacture of the complicated components.
• the number of shell parts can be kept particularly low, even with a large number of complicated components for producing the container.
• the method according to the invention can therefore be used particularly inexpensively.
• Another advantage of the container provided as a fuel tank with this method is that the number of shell parts to be connected can be kept particularly low. This contributes to a particularly low permeation of the fuel from the fuel tank. Thanks to the method according to the invention, minor changes to the brackets and lines to be arranged on the container can be carried out with particularly low tool complexity during the forming process.
• Bent connecting pieces can be produced particularly easily with the method according to the invention if the blanks are hot bent for forming. Thanks to the invention, a division of the shell part in the area of the connecting piece is no longer necessary, as in the known method.
• components to be assembled separately can be attached to the container with particularly little effort if filters, valves or further components to be connected to the container are used before the forming into the blanks.
• the forming requires a particularly low outlay if the blanks are manufactured with a cross-sectional shape corresponding to the further component by the injection molding process.
• the manufacture of the shell parts by injection molding enables the use of particularly inexpensive injection molds if the blanks are each injection-molded with a round cross-section and then if the intended cross-section of the respective component is generated by reshaping. This further optimizes the blank for the injection molding process.
• the intended wall thickness of the component is accordingly also generated during the forming process.
• the invention further contributes to further reducing the costs in the manufacture of the container if, in the case of lines which are to be produced in one piece with the container, connecting pieces with a closed base region are first produced together with the shell parts and if the base region after removal of the Shellfish is opened. Furthermore, containers can be provided with a different number of lines without changing the injection mold.
• connection pieces for lines to be connected are often made elastic in a partial area, for example in order not to transmit vibrations from the line to the container.
• such elastic areas can be easily manufactured in one piece with the container if several different plastics are supplied to the injection mold at different points in order to produce the blank in an injection molding process. The elastic area is then created simply by using a soft plastic at this point.
• the method according to the invention does not require any cores which can be moved in the injection mold if axially demoldable parts are produced by the injection molding method. As a result, the method according to the invention is particularly cost-effective.
• FIG. 1a shows a shell part made of plastic by injection molding
• FIG. 1b shows the shell part from FIG. 1a after shaping
• FIG. 2a shows a sectional view through a tubular blank of the shell part from FIG. 1a along the line IIIa-IIIa,
• FIG. 2b shows a sectional view through a line from FIG. 1b along the line 11b-11b
• 3a shows a further embodiment of the shell part made of plastic by injection molding
• FIG. 3b the shell part from FIG. 3a after shaping
• FIG. 4a shows a sectional view through a tubular blank of the shell part from FIG. 3a along the line IVa-IVa
• Figure 4b is a sectional view through a line from Figure 3b along the line IVb - IVb.
• FIG. 1a shows a shell part 1 made of plastic by injection molding.
• the shell part 1 has a flange 2 for connection to a flange of a correspondingly shaped shell part, not shown, for example for producing a fuel tank of a motor vehicle.
• the shell part 1 has a bulbous region 3 for forming one half of the fuel tank and two tubular blanks 4, 5 protruding therefrom.
• One of the blanks 4 has three regions 6-8 with different plastics with different strengths. These different areas 6 - 8 can be easily manufactured in an injection mold, not shown, by a plurality of nozzles fed by different plastics. In the drawing, the boundaries of the areas 6 - 8 are marked with dash-dotted lines.
• the second blank 5 is arranged perpendicular to the flange 2 and is conical. As a result, the second blank 5 can be manufactured in a particularly simple and therefore inexpensive injection mold. The free end of the blank 5 is closed.
• FIG. 1 b shows the shell part 1 from FIG. 1 a after the blanks 4, 5 have been formed into lines 9, 10.
• the blank 4 which has the areas 6 - 8 with different strengths, has been stretched and has a bellows 11 in a central area formed by soft plastic and at its free end a connecting piece 12 for a further line.
• the bellows 11 can be produced, for example, in the blowing process.
• the one made from the second blank 5 Line 10 is bent several times. Furthermore, the closed end of the line 10 has been opened, for example, with a heated mandrel.
• FIG. 2a shows the second blank 5 from FIG. 1a in a sectional illustration along the line III-III. It can be seen here that the blank 5 has a round cross section.
• 2b shows the line 10 from FIG. 1b in a sectional illustration along the line 11b-11b.
• the line 10 is produced by reshaping the blank 5 from FIG. 2a produced by the injection molding process. Compared to the blank 5, the line 10 has a different cross-sectional shape and a smaller wall thickness.
• brackets for attaching the container composed of shell parts 1 can be manufactured by injection molding and shaped according to their intended shape.
• FIG. 3a shows a shell part 13 made of plastic by injection molding with a flange 14 for connection to a further shell part, not shown.
• the shell part 13 has two tubular blanks 15, 16.
• the blanks 15, 16 are arranged perpendicular to the flange 14, so that the entire shell part 13 can be produced particularly cost-effectively in an axially demoldable injection mold.
• FIG. 3b shows the shell part 13 from FIG. 3a after the blanks 15, 16 have been formed.
• One of the blanks 15 has been formed into a receptacle 17 for a filter element 18.
• the filter element 18 was first inserted into the blank 15 shown in FIG. 3a and then the blank 15 was reshaped as shown in FIG. 3b, so that the filter element 18 is reliably fastened.
• the second blank 16 is formed into two parallel lines 19, 20.
• FIG. 4a shows a sectional view through the second blank 16 from FIG. 3a along the line IVa-IVa.
• FIG. 4b shows the lines 19, 20 from FIG. 3b in a sectional illustration along the line IVb-IVb. It can be seen here that the blank 16 from FIG. 4a for the production of the lines 19, 20 shown in FIG. 4b has been compressed in its central region along its longest extension.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Injection Moulding Of Plastics Or The Like (AREA)
• Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
• Containers Having Bodies Formed In One Piece (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=7895043

Family Applications (1)

Country Status (7)

Families Citing this family (6)

Family Cites Families (11)

• 1999
  • 1999-01-22 DE DE19902430A patent/DE19902430C2/de not_active Expired - Fee Related
• 2000
  • 2000-01-18 JP JP2000594628A patent/JP2002535161A/ja active Pending
  • 2000-01-18 BR BR0004308-7A patent/BR0004308A/pt not_active IP Right Cessation
  • 2000-01-18 KR KR1020007010482A patent/KR20010092253A/ko not_active Application Discontinuation
  • 2000-01-18 EP EP00904924A patent/EP1066147A1/de not_active Withdrawn
  • 2000-01-18 WO PCT/EP2000/000343 patent/WO2000043186A1/de not_active Application Discontinuation
  • 2000-01-18 CN CN00800047A patent/CN1106256C/zh not_active Expired - Fee Related

Non-Patent Citations (1)

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