CA2483153A1 - Apparatus for compression molding articles made of plastics - Google Patents

Apparatus for compression molding articles made of plastics Download PDF

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Publication number
CA2483153A1
CA2483153A1 CA002483153A CA2483153A CA2483153A1 CA 2483153 A1 CA2483153 A1 CA 2483153A1 CA 002483153 A CA002483153 A CA 002483153A CA 2483153 A CA2483153 A CA 2483153A CA 2483153 A1 CA2483153 A1 CA 2483153A1
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CA
Canada
Prior art keywords
levers
pair
dose
punch
supporting
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
CA002483153A
Other languages
French (fr)
Other versions
CA2483153C (en
Inventor
Mauro Battilani
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.)
Sacmi Imola SC
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of CA2483153A1 publication Critical patent/CA2483153A1/en
Application granted granted Critical
Publication of CA2483153C publication Critical patent/CA2483153C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
    • B29C31/042—Feeding of the material to be moulded, e.g. into a mould cavity using dispensing heads, e.g. extruders, placed over or apart from the moulds
    • B29C31/048—Feeding of the material to be moulded, e.g. into a mould cavity using dispensing heads, e.g. extruders, placed over or apart from the moulds the material being severed at the dispensing head exit, e.g. as ring, drop or gob, and transported immediately into the mould, e.g. by gravity
    • 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
    • B29C43/04—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds
    • B29C43/06—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts
    • B29C43/08—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts with circular movement, e.g. mounted on rolls, turntables
    • 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
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
    • 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
    • B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
    • B29C33/14—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels against the mould wall
    • 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
    • B29C43/34—Feeding the material to the mould or the compression means
    • 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
    • B29C2043/3272—Component parts, details or accessories; Auxiliary operations driving means
    • B29C2043/3283—Component parts, details or accessories; Auxiliary operations driving means for moving moulds or mould parts
    • B29C2043/3288—Component parts, details or accessories; Auxiliary operations driving means for moving moulds or mould parts using cam drives
    • 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
    • B29C43/34—Feeding the material to the mould or the compression means
    • B29C2043/3466—Feeding the material to the mould or the compression means using rotating supports, e.g. turntables or drums
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • B29C37/0032—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied upon the mould surface before introducing the moulding compound, e.g. applying a gelcoat
    • 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
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers

Abstract

An apparatus for compression molding plastic articles, comprising at least o ne molding unit (3, 4) composed of an upper punch (3) and a lower mold (4) provided with a cavity for molding the articles, the punch and mold being aligned with each other and movable between a spaced position and a closer positions, feeders for feeding doses (D) of plastic material to be molded, comprising at least one removal element (12) for removing, in succession, individual doses (D) from an extruder (14) and depositing a removed dose (D) in the molding cavity (5) of the mold when it is spaced from the respective punch, supporting elements for temporarily supporting said dose (D) above th e molding cavity (5), associated with the mold, and actuators for actuating th e supporting elements so as to release a dose into the cavity before compressi on start.

Claims (23)

1. Apparatus for compression molding of plastic articles (F), comprising a molding unit (3, 4), comprising an upper punch (3) and a lower mold (4) provided with a cavity (5) for molding said articles (F), said punch (3) and said lower mold (4) being mutually aligned and movable between a spaced position and a close position, feeding means (12, 13, 14) for feeding doses (D) of plastic material to be molded, said feeding means (12, 13, 14) comprising at least one removal element (12) for removing in succession individual doses (D) from an extruder (14), said at least one removal element (12) being adapted to deposit the removed dose (D) onto supporting means (18, 19, 20, 21, 26, 27) for temporarily supporting said dose (D) when said lower mold (9) is still spaced away from said punch (3), and further comprising actuating means (32; 41; 42) for actuating said supporting means (18, 19,.20, 21, 26, 27) so as to release said dose (D) into said cavity (5) before said punch (3) and said lower mold (4) start the compression step, characterized in that, said supporting means (18, 19, 20, 21, 26, 27) are mounted so that they extend externally to, and partially above, an upper edge of said lower mold (4).
2. Apparatus according to claim 1, and further comprising a rotating carousel (1) comprising a supporting element (2) that rotates about an axis (A), one or more units (3, 4) corresponding to said molding unit (3, 4) being mounted on said supporting element (2) concentrically to said axis (A), further actuating means being provided for actuating said supporting element (2) so that said molding unit (3, 4) advances along a circular path (C) passing through a position in which said feeding means (12, 13, 14) is provided.
3. Apparatus according to claim 1, or 2, wherein said supporting means (18. 19, 20, 21, 26, 27) comprises a lever system (18, 19, 20, 21), which supports a pair of rods (26.
27), each rod (26, 27) of said pair of rode lying substantially diametrically above said cavity (5).
4. Apparatus according to claim 3, wherein said lever system (18, 19, 20. 21) comprises a pair of levers (20, 21) pivoted to said mold (4) each lever of said pair of levers (20, 21 ) being rigidly coupled to one end of a respective rod of said pair of rods (26, 27) and actuated by said actuating means (32; 41; 42).
5. Apparatus according to claim 4, wherein said lever system (18, 19, 20, 21) comprises a further pair of levers (18.
19) which are pivoted to said mold (4) in a substantially diametrically opposite position relative to said pair of levers (20, 21), each further lever of said further pair of levers (18, 19) being rigidly coupled to another end of said respective rod (26, 27).
6. Apparatus according to claim 4, or 5, wherein the levers of said pair of levers (20, 21) and said further pair of levers (18, 19), if any, are articulately connected to each other.
7. Apparatus according to claim 5, or 6, as claim 3 is appended to claim 2, wherein the levers of said pair of levers (20, 21) and said further pair of levers (18, 19) are arranged so as to oscillate in respective planes which are substantially radially arranged with respect to said axis (A).
8. Apparatus according to any of claims 5 to 7, and further comprising a traction spring (31), which acts between the levers of said pair of levers (20, 21) and of said further pair of levers (18, 19).
9. Apparatus according to any of claims 3 to 6, as claim 3 is appended to claim 2, wherein said rods (26, 27) li~
substantially radially with respect to said axis (A).
10. Apparatus according to any preceding claim, wherein said actuating means comprises cam means (32; 41; 42) by which said supporting means (18, 19. 20, 21, 26, 27) can be actuated between a closer configuration for supporting said dose (D) and a spaced configuration for releasing said dose (D) into said molding unit (3, 4).
11. Apparatus according to claim 10, as appended to any of claim 4 to 8 or as appended to claim 9, as claim 9 is appended to any of claims 4 to 6; wherein at least one of the levers of said pair of levers (20, 21) and of said further pair of levers (18, 19), if any, is provided with a cam follower (35; 38, 39; 40) functionally associated with a respective cam (32; 41; 42) of said cam means.
12. Apparatus according to claim 11, as claim 3 is appended to claim 2, wherein said cam (32) is fixed to said supporting element (2) and is active when said mold (4) is moved towards to, and away from, said punch (3).
13. Apparatus according to claim 12, wherein acid cam (32) is provided with a ramp (33) and a straight portion (34) parallel to said axis (A).
14. Apparatus according to any of claims 11 to 13, wherein said cam follower (35; 38, 39; 40) is constituted by a roller (35) that is freely supported by arms (36, 37) that are rigidly coupled to corresponding levers (18, 19, 20. 21) of said pair of levers (20, 21) and of said further pair of levers (18, 19).
15. Apparatus according to claim 10, or 11, as claim 10 is appended to claim 9 and claim 9 is appended to any of claims 4 to 6, wherein said cam means (32; 41; 42) comprises two slots (43, 44), suitable for engaging two rollers (38, 39) fixed to a portion of the levers of said pair of levers (20, 21) facing said axis (A).
16. Apparatus according to claim 15, wherein said two slots (43, 44) comprise two parallel, vertical and spaced portions connected to two parallel, vertical and close portions by means of respective inclined portions.
17. Apparatus according to claim 15, or 16, wherein said cam means (32; 41; 42) comprises a stationary cam (42) provided with a bulge protruding from an upward surface of said supporting element (2).
18. Apparatus according to claim 17, wherein said stationary cam (42) engages a further roller (40) supported by a pivot (28) at which the levers of said pair of levers (20, 21) and of said further pair of levers (18, 19) are mutually articulated, said further roller (40) being arranged at a side of said mold (4) opposite to said axis (A), in order to actuate said rode (26, 27) so as to perform a movement for gripping said dose (D).
19. Apparatus according to any of claims 3 to 9, or 10 to 18.
as claim 10 is appended to say of claims 3 to 9, wherein said rods (26, 27) are centrally provided with respective curved portions (45, 46) forming a seat suitable for receiving said dose (D).
20. Apparatus according to any one of the preceding claims, and further comprising a label, suitable to be incorporated is said plastic material during molding of said article (F), which is deposited in said cavity (5).
21. Apparatus according to any preceding claim, and further comprising means for thermally conditioning said supporting means (18, 19, 20, 21, 26, 27).
22. A method for compression molding of plastic articles (F), comprising molding a dose (D) of plastic material in a molding unit (3, 4) between an upper punch (3) and a lower mold (4) comprising a cavity (5), the upper punch (3) and the lower mold (4) being mutually aligned and movable between a spaced position and a close position, feeding said dose (D) by using feeding means (12, 13, 14) for removing said dose (D) from an extruder (14) and delivering the removed dose (D) to supporting means (18, 19, 20, 21, 26, 27) temporarily supporting said dose (D) when said lower mold (4) is still spaced away from said punch (3), and further comprising actuating said supporting means (18, 19, 20, 21, 26, 27) by using actuating means (32; 41; 42) so as to release said dose (D) into said cavity (5) before said punch (3) and said lower mold (4) start the compression step, characterized in that, said delivering comprises moving said cavity (5) towards said punch (3) such that said dose (D) is separated from said supporting means (18, 19, 20, 21, 26, 27).
23. Method according to claim 22, wherein said moving comprises propelling said dose (D) against said punch (3).
CA2483153A 2002-04-23 2003-04-17 Apparatus for compression molding articles made of plastics Expired - Fee Related CA2483153C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT2002BO000226A ITBO20020226A1 (en) 2002-04-23 2002-04-23 EQUIPMENT FOR PRESSURE MOLDING OF ITEMS IN PLASTIC MATERIAL, SUCH AS CAPSULES FOR CLOSING CONTAINERS AND SIMILAR
ITBO2002A000226 2002-04-23
PCT/EP2003/004089 WO2003090989A1 (en) 2002-04-23 2003-04-17 Apparatus for compression molding articles made of plastics

Publications (2)

Publication Number Publication Date
CA2483153A1 true CA2483153A1 (en) 2003-11-06
CA2483153C CA2483153C (en) 2010-11-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2483153A Expired - Fee Related CA2483153C (en) 2002-04-23 2003-04-17 Apparatus for compression molding articles made of plastics

Country Status (16)

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US (1) US7025582B2 (en)
EP (2) EP1785249B1 (en)
JP (1) JP4391833B2 (en)
KR (1) KR100936448B1 (en)
CN (1) CN100337805C (en)
AT (1) ATE349309T1 (en)
AU (1) AU2003239809B2 (en)
BR (1) BR0309455B1 (en)
CA (1) CA2483153C (en)
DE (1) DE60310702T2 (en)
ES (1) ES2277081T3 (en)
IT (1) ITBO20020226A1 (en)
MX (1) MXPA04010481A (en)
RU (1) RU2318663C2 (en)
WO (1) WO2003090989A1 (en)
ZA (1) ZA200408226B (en)

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EP1243393A1 (en) * 2001-03-19 2002-09-25 Oberburg Engineering Ag Process for compression moulding thermoplastics
ITMO20030289A1 (en) * 2003-10-23 2005-04-24 Sacmi EQUIPMENT, METHOD AND ARTICLE.
ITRE20040009A1 (en) * 2004-02-04 2004-05-04 Sacmi PLANT FOR COMPRESSION FORMING OF PLASTIC OBJECTS
US7178562B2 (en) * 2004-04-08 2007-02-20 Graham Packaging Pet Technologies Inc. Pellet transfer apparatus and method
US7632089B2 (en) * 2004-05-07 2009-12-15 Graham Packaging Pet Technologies, Inc. Take out and cooling system and method
ITMO20050048A1 (en) * 2005-03-01 2006-09-02 Sacmi EQUIPMENT AND METHODS.
ITRE20050015A1 (en) * 2005-03-01 2006-09-02 Sacmi GROUP AND METHOD FOR THE COMPRESSION FORMING OF OBJECTS IN POLYMERIC MATERIAL WITHIN MOLDS
ITMO20060089A1 (en) 2006-03-17 2007-09-18 Sacmi EQUIPMENT AND METHODS
JP4506734B2 (en) * 2006-03-31 2010-07-21 Ｔｄｋ株式会社 Molding equipment
US7628601B2 (en) * 2007-07-30 2009-12-08 Rexam Closure Systems Inc. Machine for compression molding plastic articles
US7824293B2 (en) * 2007-09-28 2010-11-02 Oshkosh Corporation Vehicle transmission
ITMO20080023A1 (en) * 2008-01-29 2009-07-30 Sacmi SYSTEM FOR TRANSFERRING PLASTIC MATERIAL DOSES
JP4670883B2 (en) * 2008-03-19 2011-04-13 東洋製罐株式会社 Molten resin supply apparatus, molten resin compression molding method, molten resin compression molding apparatus, and synthetic resin container manufacturing method
ITUB20154653A1 (en) * 2015-10-14 2017-04-14 Sacmi Apparatus and method for processing doses.

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US4296061A (en) * 1980-03-19 1981-10-20 Owens-Illinois, Inc. Thermoplastic gob feeding and transfer method and apparatus
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ITBO940242A1 (en) * 1994-05-23 1995-11-23 Sacmi EQUIPMENT FOR PRESSURE MOLDING OF ARTICLES IN PLASTIC MATERIAL, SUCH AS CAPSULES FOR THE CLOSING OF CONTAINERS AND SIMILAR.
EP0838326B1 (en) * 1996-10-24 2003-02-12 SACMI COOPERATIVA MECCANICI IMOLA S.c.r.l. Apparatus for molding a plastic seal inside a closure for closing a container
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ITBO20010555A1 (en) * 2001-09-14 2003-03-14 Sacmi EQUIPMENT FOR FORMING AND APPLICATION OF SEAL IN CAPSULES

Also Published As

Publication number Publication date
CN100337805C (en) 2007-09-19
AU2003239809B2 (en) 2007-11-22
JP4391833B2 (en) 2009-12-24
ITBO20020226A1 (en) 2003-10-23
BR0309455B1 (en) 2013-12-24
KR20050020781A (en) 2005-03-04
EP1499486A1 (en) 2005-01-26
ITBO20020226A0 (en) 2002-04-23
ZA200408226B (en) 2006-03-29
US7025582B2 (en) 2006-04-11
DE60310702D1 (en) 2007-02-08
DE60310702T2 (en) 2007-10-04
KR100936448B1 (en) 2010-01-13
CA2483153C (en) 2010-11-23
BR0309455A (en) 2005-02-09
ES2277081T3 (en) 2007-07-01
RU2004133970A (en) 2005-06-27
RU2318663C2 (en) 2008-03-10
US20030198707A1 (en) 2003-10-23
AU2003239809A1 (en) 2003-11-10
MXPA04010481A (en) 2004-12-13
ATE349309T1 (en) 2007-01-15
EP1785249A1 (en) 2007-05-16
CN1646283A (en) 2005-07-27
JP2005523186A (en) 2005-08-04
EP1785249B1 (en) 2012-10-31
EP1499486B1 (en) 2006-12-27
WO2003090989A1 (en) 2003-11-06

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