US3339242A - Collapsible tools for use in the moulding, casting or pressing of hollow articles - Google Patents

Collapsible tools for use in the moulding, casting or pressing of hollow articles Download PDF

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Publication number
US3339242A
US3339242A US409207A US40920764A US3339242A US 3339242 A US3339242 A US 3339242A US 409207 A US409207 A US 409207A US 40920764 A US40920764 A US 40920764A US 3339242 A US3339242 A US 3339242A
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US
United States
Prior art keywords
segments
faces
spigot
core
moulding
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.)
Expired - Lifetime
Application number
US409207A
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English (en)
Inventor
Lamb Harry
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.)
Ketch Plastics Ltd
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Ketch Plastics Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of US3339242A publication Critical patent/US3339242A/en
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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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4421—Removing or ejecting moulded articles for undercut articles using expansible or collapsible cores
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
    • B29C33/485—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling cores or mandrels
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2022/00—Hollow articles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/058—Undercut
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/218—Pipe machine: socket forming apparatus

Definitions

  • a collapsible core comprises a tapered spigot member, havingfirst and second sets 'of inclined faces, the faces of said first set being more i steeply inclined to the axis of the spigot member than the faces of said second set and the faces of said first set being disposed respectively between adjacent faces of said second set and a plurality of segments slidably retained respectively on said inclined faces, the arrangement being such that the spigot member can be moved relative to -the segments from a working position, in which the segments combine to form a surface complementary to the internal surface of the article, to a withdrawal position in which all the segments are displaced towards the axis of e the spigot member, the segments mounted on said first set of faces being displaced by a distance greater than the segments mounted on said second set and each of the segments mounted on said second set of faces projecting at opposite lateral sides into-the spaces vacated by the ad- .jacent segments mounted on said first set of faces;
  • the invention also resides in an injection moulding machine incorporating a core as above defined.
  • FIGURE 1 is a diagrammatic plan view of an injection A r moulding machine
  • FIGURE 2 is a sectional view showing an example of a collapsible core in accordance with the invention.
  • FIGURE 3 is a section on line 33 in FIGURE 2;
  • FIGURE 4 is a view similar to FIGURE 2, but showing the core in a collapsed condition;
  • FIGURE 5 isa section on line 5-5 in FIGURE 4;
  • FIGURE 6 is a sectional view like FIGURE ing another example of the invention.
  • FIGURE 7 is a half section on line 7-7 in FIGURE 6 2 but showshowing the" core in a working position and
  • FIGURE 8 is a half section similar to FIGURE 7 but showing the core collapsed.
  • the invention' can be employed in the manufacture of transparent street lamp covers 10 on an automatic injection moulding machine.
  • the covers are of bowl-shaped form and are provided on their interior surfaces with a plurality of raised ribs 11 (see FIGURE 4).
  • the bowl is to be formed as a one-piece "moulding, to provide a core on one of the dies, which core is shaped to form the interior surface of the bowl.
  • the raised ribs prevent the use of a solid core as it would be impossible to remove the finished bowl from the core without damage to the ribs.
  • Some form of collapsible core is therefore required and as it is to be used in an automatic process it is essential that the core should be removable from the moulding without first dismantling the core.
  • the core comprises a plurality of segments which are to be mounted on one platen of the moulding machine in such a manner that some of the segments can be displaced inwardly by a comparatively large distance so that the remaining segments can overlap these segments as they are moved inwardly by a smaller distance.
  • segments 12 In the actual core there are eight segments four of which subtend relatively small arcs at the axis of the core. These four segments 12 are each of substantially trapezoidal cross-sectional configuration. The other four segments 13 are chamfered at their edges 13a to mate with the sides of the trapezoidal segments when the segments occupy a working position.
  • the eight segments 12, 13 are slidably supported on a tapered spigot 14 which has eight faces and the two types of segments 12, 13 alternate around the spigot.
  • the trapezoidal segments 12 are slidable on faces 14a which are groove 14c in the associated face.
  • the spigot member 14 is hollow and extending through its interior is a bar 16 on one end of which a nose por tion 17 for the core is mounted.
  • the spigot member 14 is secured to a plate 18 on the movable platen 19 of an injection moulding machine.
  • the above mentioned bar 16 is secured to the ejector plate 20 of the machine and also mounted on this plate are eight projecting pins 21 engageable respectively with the eight core segments 12, 13.
  • the platens 19, 22 are closed in the normal way and the synthetic resin material is injected by the injector 23.
  • the platens separate the sprue breaks in the usual way and the moulding 10 is carried away on the core.
  • the ejector stop 24a engages the ejector bar 24
  • movement of the ejector plate 20 is arrested whilst the movable platen 19 continues 'to move.
  • the nose portion 17 of the core and the segments 12, 13 are prevented from making further axial movement whilst the spigot 14 continues to move.
  • all of the segments are displaced toward the axis of the spigot.
  • FIGURES 6 to 8 Two similar cores are employed to mould a sleeve 25 which hasan internal flange intermediate its ends and an' inturned flange at each end.
  • the operation of the core on the movable platen is exactly as described above.
  • a similar spigot and segment arrangement is also mounted spigot secured to the 'fixed platen.
  • the core on the movable platen 19 again includes a hollow spigot 26 attached to a plate 18 secured to platen 19. Keyed to this spigot 26 (in this case'by T- shaped keys 27) are the eight segments 29, 30, corresponding to the segments 12, 13 respectively.
  • the ejector plate 20 again has a bar 31, carrying the nose portions 32 of the die, secured to it. Also secured to it are ejector pins 33 engaging a ring 34 against which the segments 29, 30 abut.
  • the ring 34 is spring-loaded by means of springs 35 acting on a part 36 secured to the movable platen 19. Part 36 actually forms a part of the moulding surface.
  • a pair of transverse horizontal guide rails 37, 37a which guide a pair of vertically split external die parts 38.
  • the two die parts 38 are also engaged on bars 39 fixed to a stationary part of the machine and diverging in horizontal planes away from the fixed platen 22.
  • the core on the fixed platen 22 includes a hollow spigot 40 identical to spigot 26 and secured to the fixed platen. Keyed to spigot 40 are segments 41, 42 corresponding to segments 29, 30 respectively. The segments are movable relative to the spigot by means of a ring member 43 to which a pair of headed bolts 44 are secured. These bolts 44 can co-act with catch plates 45 on the die parts 38. There is also provided a bar 46 carrying the nose 47 of the fixed die.
  • the mould now splits and the moulding is carried away on the core of the movable platen, from which it is released as described in the first mentioned example of the invention.
  • a collapsible core comprising a tapered spigot member having first and second sets of inclined faces, the faces of said first set being more steeply inclined to the axis of the spigot member than the faces of said second set and the faces of said first set being disposed respectively between adjacent faces of said second set and a plurality of segments slidably retained respectively, on said inclined faces, the arrangement being such that the spigot member can be moved relative to the segments from a working position, in which the segments combine to form a surface complementary to the intemal surface of the article, to a withdrawal position in which all the segments are displaced towards the axis of the spigot member, the segments mounted on said first set of faces being displaced by a distance greater than the segments mounted on said second set and each of the segments mounted on said second set of faces projecting at opposite lateral sides into the spaces vacated by the adjacent segments mounted on said first set of faces.
  • a collapsible core comprising a tapered spigot having an axial passage formed therein and having first and second sets of inclined faces, the faces of said first set being more steeply inclined to the axis of the spigot member than the faces of the second set, and the faces of the first set being disposed respectively between the faces of the second set, a plurality of segments mounted respectively on said inclined faces, means retaining the segments in contact with the respective faces so that axial displacement of any segment relative to the spigot member results in displacement of the segment towards the axis of the spigot member at a rate determined by the inclination of the associated face of the spigot member, a bar extending through the axial passage in the spigot member, a nose portion on one end of the bar, the segments each abutting at one end against the nose portion to form in combination therewith a working surface of the tool, and means whereby the segments and bar are movable axially relative to the spigot member to effect inward displacement of the segments to a withdrawal position in which the
  • a collapsible core mounted on the movable platen and comprising a tapered spigot member secured relative to the movable platen and having first and second sets of inclined faces, the faces of said first set being more steeply inclined to the axis of the spigot member than the faces of said second set and the faces of said first set being disposed respectively between the faces of said second set, a plurality of segments mounted respectively on said faces and retained thereon by key means which serve to cause the segments to be displaced inwardly when moved axially along the spigot member and means operable by said ejector mechanism to displace the segments from a working position along the spigot member to a withdrawal position during movement of the movable platen away from the fixed platen, the segments forming in said working position a moulding surface complementary to the internal surface of a hollow article to be moulded in the machine
  • first and second collapsible cores mounted respectively on the fixed and movable platens and each comprising a tapered spigot member secured relative to the associated platen and having first and second sets of inclined faces, the faces of the first set being more steeply inclined to the axis of the spigot than the faces of the second set and the faces of the first set being disposed respectively between adjacent faces of the second set, a plurality of segments mounted on the inclined faces of the spigot member, means retaining the segments on the respective faces of the spigot member whereby axial movement of any segment causes it to be displaced inwardly by a distance determined by the inclination of the associated face so that the segments can be axially displaced along the spigot simultaneously from a working position, in which the segments form in combination a part of a mould surface complementary to the internal surface of a hollow article to be
  • the combination claimed in claim 4 together with a pair of die parts for forming part of a moulding surface complementary to the external surface of a hollow article to be moulded in the machine, means mounting said die parts for movement in directions diverging in an axial direction away from the fixed platen, means connecting said die parts to the movable platen so that movement of the movable platen away from the fixed platen causes the die parts to be moved away from the fixed platen and therefore separated, a ring member abutted against the segments of the first core and means forming an operative connection between the die parts and said ring member when the spacing of said die parts is less than a predetermined distance.
  • said means forming said operative connection comprises a pair of bolts projecting from the ring member, a pair of enlarged heads on the bolts respectively and two pairs of catch plates on the die parts respectively for co-acting with said enlarged heads.
  • a collapsible core as claimed in claim 6 incorporating a plate attached to the end of said bar opposite said nose portion, and means on said plate engaging said segments at one axial end to urge the latter into abutment with said nose portion, the nose portion, bar, segments and plate being movable axially as a single unit relative to the spigot member.
  • a collapsible core as set forth in claim 3 and including a plate axially movable relative to said spigot member by the ejector mechanism, a bar secured to the plate and extending through an axial passage in the spigot member, a nose portion on the bar which combines with the segments when in the working position to form said moulding surface, and means on said plate engaging the segments at one axial end to hold them against the nose portion at the opposite axial end, so that movement of the plate by the ejector mechanism causes simultaneous axial movement of the nose portion and the segments relative to the spigot member.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
US409207A 1963-11-12 1964-11-05 Collapsible tools for use in the moulding, casting or pressing of hollow articles Expired - Lifetime US3339242A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB44573/63A GB1045350A (en) 1963-11-12 1963-11-12 Collapsible tools for use in the moulding, casting or pressing of hollow articles

Publications (1)

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US3339242A true US3339242A (en) 1967-09-05

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US409207A Expired - Lifetime US3339242A (en) 1963-11-12 1964-11-05 Collapsible tools for use in the moulding, casting or pressing of hollow articles

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US (1) US3339242A (en)van)
BE (1) BE655157A (en)van)
DE (1) DE1479374B2 (en)van)
DK (1) DK121200B (en)van)
GB (1) GB1045350A (en)van)
NL (1) NL6412871A (en)van)
NO (1) NO117326B (en)van)
SE (1) SE306824B (en)van)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387323A (en) * 1966-03-14 1968-06-11 Nyloncraft Inc Mold with core having thread forming portions
US3433292A (en) * 1966-05-25 1969-03-18 Gen Motors Corp Locking mechanism for diecasting
US3474999A (en) * 1967-06-28 1969-10-28 United States Pipe Foundry Apparatus for forming hollow plastic articles
US3528637A (en) * 1965-08-24 1970-09-15 Microdot Inc Core set for molding a partial thread
US3677684A (en) * 1969-12-15 1972-07-18 Nat Distillers Chem Corp Apparatus for enlarging an extremity of a plastic pipe
US3729282A (en) * 1968-10-24 1973-04-24 Mannesmann Ag Apparatus for radially expanding the end portion of a tube mode of thermoplastic synthetic material
US3853299A (en) * 1971-09-25 1974-12-10 B Kessel Apparatus for producing tubing, especially from material suitable for injection molding
US3865529A (en) * 1973-12-05 1975-02-11 Beatrice Foods Co Molding apparatus
US3940227A (en) * 1974-06-20 1976-02-24 Strasser Georg J Expansible mandrel
US3989439A (en) * 1973-11-23 1976-11-02 Inteco Establishment Device for forming tube sockets
US4021180A (en) * 1974-12-20 1977-05-03 Standard Oil Company (Indiana) Collapsible core
DE2845655A1 (de) * 1977-11-03 1979-05-10 Metallwarenfabrik Fischamend Kollabierender kern fuer giessformen
US4206799A (en) * 1978-12-11 1980-06-10 Mcdonald John W Oblique core locking mechanism for die casting machines
US4236883A (en) * 1979-07-05 1980-12-02 Nrm Corporation Tire press
US4286766A (en) * 1980-04-18 1981-09-01 Holdt J W Von Collapsible mold core
US4327051A (en) * 1978-07-06 1982-04-27 Plastiers Limited Method of molding gutter fittings
US4362291A (en) * 1980-02-26 1982-12-07 Toshiba Kikai Kabushiki Kaisha Metal mold for molding hollow article having inwardly tapered side wall
US4383819A (en) * 1980-07-16 1983-05-17 Letica Corporation Apparatus for forming a container
US4541605A (en) * 1983-02-16 1985-09-17 Daiichi-Geyer Kabushiki Kaisha Metal mold device
US4578028A (en) * 1984-12-06 1986-03-25 The Procter & Gamble Company Expandable core pin for blow-molding a container having a neck-portion with internal attachment means
US4848718A (en) * 1986-04-23 1989-07-18 E. I. Du Pont De Nemours And Company Apparatus for molding heat weldable pipe fittings
US4929410A (en) * 1984-12-06 1990-05-29 The Procter & Gamble Company Method for blow-molding a container having a neck-portion with internal attachment means
US5266137A (en) * 1992-11-10 1993-11-30 Hollingsworth Ritch D Rigid segmented mandrel with inflatable support
EP0630734A1 (de) * 1993-06-22 1994-12-28 GEYER GmbH + Co. KG WERKZEUGBAU Verfahren zur Entformung von Spritzgusshohlkörpern mit Hinterschneidungen in der Innenkontur und zugehöriger Formkern
US5833912A (en) * 1997-10-14 1998-11-10 Schweigert; Lothar Method of injection molding a container
US6099785A (en) * 1998-03-17 2000-08-08 Schweigert; Lothar Method for injection molding plastic closures
US6506330B1 (en) 1998-03-17 2003-01-14 Lothar Schweigert Apparatus and method for molding plastic closures
NL1044079B1 (en) * 2021-06-30 2023-01-09 Robert Van Dongen Antoine Mould
WO2025017248A1 (fr) * 2023-07-20 2025-01-23 Safran Outillage pour le moulage de pièces de révolution avec compactage circonférentiel depuis la face interne d'une préforme

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59366B2 (ja) * 1975-08-19 1984-01-06 株式会社クボタ ゴウセイジユシセイケイヨウカナガタ
NL188626C (nl) * 1977-10-27 1992-08-17 Geyer & Co Fa Spreidkern voor de vervaardiging van spuitdelen.
DK154332B (da) * 1977-10-31 1988-11-07 Geyer & Co Spredekerne til fremstilling af sproejtestoebte emner
JPS5812102B2 (ja) * 1980-01-10 1983-03-07 日産自動車株式会社 羽根状回転体のダイカスト鋳造法
CH654764A5 (de) * 1982-03-10 1986-03-14 Fischer Ag Georg Metallischer kernzug.
US4533312A (en) * 1982-12-27 1985-08-06 Holdt J W Von Simplified collapsible mold core
DE3666178D1 (en) * 1985-08-30 1989-11-16 Clarke & Co Moulds Ltd R Collapsible mould core
DE3690679T1 (en)van) * 1986-01-24 1987-11-19
DE3820084A1 (de) * 1988-06-02 1989-12-07 Hansjuergen Moeser Formwerkzeug zur herstellung von spritzteilen
NO166420C (no) * 1988-10-14 1991-07-31 Norske Stats Oljeselskap Ventil.
DE102006015767A1 (de) * 2006-04-04 2007-10-18 Kunststoff-Fröhlich GmbH Spritzgießform-Schiebereinrichtung

Citations (8)

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Publication number Priority date Publication date Assignee Title
US1921125A (en) * 1931-10-02 1933-08-08 Raymond Concrete Pile Co Mandrel
US1995485A (en) * 1932-07-29 1935-03-26 Gen Motors Corp Machine to countersink twenty holes in a wheel hub shell for short spokes
US1997074A (en) * 1930-01-24 1935-04-09 John Stogdell Stokes Method of and apparatus for molding synthetic resinous articles
US2263037A (en) * 1940-01-31 1941-11-18 Gits Molding Corp Method of and die for molding picture frames
FR905388A (fr) * 1940-01-19 1945-12-03 Poinçon contractable pour travaux de moulage et analogues
US2654413A (en) * 1951-03-24 1953-10-06 Rohr Aircraft Corp Expansible mandrel
US2943667A (en) * 1957-10-14 1960-07-05 Arrowsmith Tool & Die Corp Expanding mandrel hydro-press
US3247548A (en) * 1962-05-28 1966-04-26 Roehr Metals & Plastics Compan Apparatus for making a molded article

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1997074A (en) * 1930-01-24 1935-04-09 John Stogdell Stokes Method of and apparatus for molding synthetic resinous articles
US1921125A (en) * 1931-10-02 1933-08-08 Raymond Concrete Pile Co Mandrel
US1995485A (en) * 1932-07-29 1935-03-26 Gen Motors Corp Machine to countersink twenty holes in a wheel hub shell for short spokes
FR905388A (fr) * 1940-01-19 1945-12-03 Poinçon contractable pour travaux de moulage et analogues
US2263037A (en) * 1940-01-31 1941-11-18 Gits Molding Corp Method of and die for molding picture frames
US2654413A (en) * 1951-03-24 1953-10-06 Rohr Aircraft Corp Expansible mandrel
US2943667A (en) * 1957-10-14 1960-07-05 Arrowsmith Tool & Die Corp Expanding mandrel hydro-press
US3247548A (en) * 1962-05-28 1966-04-26 Roehr Metals & Plastics Compan Apparatus for making a molded article

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528637A (en) * 1965-08-24 1970-09-15 Microdot Inc Core set for molding a partial thread
US3387323A (en) * 1966-03-14 1968-06-11 Nyloncraft Inc Mold with core having thread forming portions
US3433292A (en) * 1966-05-25 1969-03-18 Gen Motors Corp Locking mechanism for diecasting
US3474999A (en) * 1967-06-28 1969-10-28 United States Pipe Foundry Apparatus for forming hollow plastic articles
US3729282A (en) * 1968-10-24 1973-04-24 Mannesmann Ag Apparatus for radially expanding the end portion of a tube mode of thermoplastic synthetic material
US3677684A (en) * 1969-12-15 1972-07-18 Nat Distillers Chem Corp Apparatus for enlarging an extremity of a plastic pipe
US3853299A (en) * 1971-09-25 1974-12-10 B Kessel Apparatus for producing tubing, especially from material suitable for injection molding
US3989439A (en) * 1973-11-23 1976-11-02 Inteco Establishment Device for forming tube sockets
US3865529A (en) * 1973-12-05 1975-02-11 Beatrice Foods Co Molding apparatus
US3940227A (en) * 1974-06-20 1976-02-24 Strasser Georg J Expansible mandrel
US4021180A (en) * 1974-12-20 1977-05-03 Standard Oil Company (Indiana) Collapsible core
DE2845655A1 (de) * 1977-11-03 1979-05-10 Metallwarenfabrik Fischamend Kollabierender kern fuer giessformen
FR2407776A1 (fr) * 1977-11-03 1979-06-01 Metallwarenfabrik Fischamend Noyau a deboitement pour moules de fonderie
US4209161A (en) * 1977-11-03 1980-06-24 Wien-Fischamender Metallwarenfabrik Josef Suschny & Sohne Collapsible core for casting molds
US4327051A (en) * 1978-07-06 1982-04-27 Plastiers Limited Method of molding gutter fittings
US4206799A (en) * 1978-12-11 1980-06-10 Mcdonald John W Oblique core locking mechanism for die casting machines
US4236883A (en) * 1979-07-05 1980-12-02 Nrm Corporation Tire press
US4362291A (en) * 1980-02-26 1982-12-07 Toshiba Kikai Kabushiki Kaisha Metal mold for molding hollow article having inwardly tapered side wall
US4286766A (en) * 1980-04-18 1981-09-01 Holdt J W Von Collapsible mold core
US4383819A (en) * 1980-07-16 1983-05-17 Letica Corporation Apparatus for forming a container
US4541605A (en) * 1983-02-16 1985-09-17 Daiichi-Geyer Kabushiki Kaisha Metal mold device
US4578028A (en) * 1984-12-06 1986-03-25 The Procter & Gamble Company Expandable core pin for blow-molding a container having a neck-portion with internal attachment means
US4929410A (en) * 1984-12-06 1990-05-29 The Procter & Gamble Company Method for blow-molding a container having a neck-portion with internal attachment means
US4848718A (en) * 1986-04-23 1989-07-18 E. I. Du Pont De Nemours And Company Apparatus for molding heat weldable pipe fittings
US5266137A (en) * 1992-11-10 1993-11-30 Hollingsworth Ritch D Rigid segmented mandrel with inflatable support
EP0630734A1 (de) * 1993-06-22 1994-12-28 GEYER GmbH + Co. KG WERKZEUGBAU Verfahren zur Entformung von Spritzgusshohlkörpern mit Hinterschneidungen in der Innenkontur und zugehöriger Formkern
US5833912A (en) * 1997-10-14 1998-11-10 Schweigert; Lothar Method of injection molding a container
US6099785A (en) * 1998-03-17 2000-08-08 Schweigert; Lothar Method for injection molding plastic closures
US6506330B1 (en) 1998-03-17 2003-01-14 Lothar Schweigert Apparatus and method for molding plastic closures
NL1044079B1 (en) * 2021-06-30 2023-01-09 Robert Van Dongen Antoine Mould
WO2025017248A1 (fr) * 2023-07-20 2025-01-23 Safran Outillage pour le moulage de pièces de révolution avec compactage circonférentiel depuis la face interne d'une préforme
FR3151239A1 (fr) * 2023-07-20 2025-01-24 Safran Outillage pour le moulage de pièces de révolution avec compactage circonférentiel depuis la face interne d’une préforme

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DE1479374A1 (de) 1969-04-30
GB1045350A (en) 1966-10-12
NL6412871A (en)van) 1965-05-13
SE306824B (en)van) 1968-12-09
NO117326B (en)van) 1969-07-28
DE1479374B2 (de) 1971-07-08
BE655157A (en)van) 1965-03-01
DK121200B (da) 1971-09-20

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