Some content of this application is unavailable at the moment.
If this situation persist, please contact us atFeedback&Contact
1. (WO2007028702) MOULDS FOR MOULDING OBJECTS MADE OF PLASTICS AND A METHOD FOR PRODUCING A MOULD ELEMENT
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

CLAIMS
1. Mould comprising at least two die parts (2), each die part (2) comprising a recess (71) for forming a portion of an object and conduit means (4) through which a cooling fluid can flow, said conduit means (4) comprising a curved conduit (43) which surrounds said recess (71), an inlet conduit (41) having a supply portion (41a) which leads into said curved conduit (43) and an outlet conduit (42) having a discharge portion (42a) which leaves said curved conduit (43) so as to define a path for said cooling fluid, characterised in that said curved conduit (43) , said supply portion (41a) and said discharge portion (42a) are so arranged as to be interceptable by a common plane (40) that contains said path.
2. Mould according to claim 1, wherein said curved conduit

(43) extends substantially along a circumference arc.

3. Mould according to claim 1 or 2, wherein said inlet conduit (41) and said outlet conduit (42) are interceptable by said common plane (40) over the entire length thereof.
4. Mould according to any preceding claim, wherein said conduit means (4) comprises a supply section (45) that connects said inlet conduit (41) to a supply (I) of said cooling fluid.
5. Mould according to claim 4, wherein said supply section

(45) is connected to an end of said inlet conduit (41) that is opposite said supply portion (41a) .
6. Mould according to claim 4 or 5, wherein said supply section (45) is substantially perpendicular to said inlet conduit (41) .
7. Mould according to any preceding claim, wherein said conduit means (4) comprises a discharge section (46) that connects said outlet conduit (42) to an outlet (U) of said cooling fluid.
8. Mould according to claim 7, wherein said discharge section (46) is connected to an end of said outlet conduit (42) that is opposite said discharge portion (42a) .
9. Mould according to claim 7 or 8, wherein said discharge section (46) is substantially perpendicular to said outlet conduit (42) .
10. Mould according to any preceding claim, wherein said conduit means (4) comprises a further curved conduit (53) that extends around said recess (71).
11. Mould according to claim 10, wherein said further curved conduit (53) extends substantially along a circumference arc .
12. Mould according to claim 10 or 11, wherein said further curved conduit (53) is interceptable by a further common plane.
13. Mould according to claim 12, wherein said further common plane is substantially parallel to said common plane.

14. Mould according to any one of claims 10 to 13, wherein said curved conduit (43) and said further curved conduit (53) are interceptable by a substantially cylindrical surface which extends around said recess (71).
15. Mould according to any one of claims 10 to 14, wherein said conduit means (4) comprises connecting conduit means (56, 57, 58, 59) that connects said curved conduit (43) to said further curved conduit (53) .
16. Mould according to claim 15, as appended to claim 14, wherein said connecting conduit means (56, 57, 58, 59) is interceptable by said substantially cylindrical surface .
17. Mould according to claim 15 or 16, wherein said connecting conduit means (56, 57, 58, 59) comprises a first connecting conduit (56) that extends to said further curved conduit (53) from a junction zone between said curved conduit (43) and said supply portion (41a) . 18. Mould according to claim 17, wherein said connecting conduit means (56, 57, 58, 59) comprises a second connecting conduit (57) that extends to said further curved conduit (53) from a further junction zone between said curved conduit (43) and said discharge portion (42a) .
19. Mould according to claim 18, wherein said first connecting conduit (56) and said second connecting conduit (57) are substantially orthogonal to said common plane (40) .
20. Mould according to any one of claims 15 to 19, wherein said connecting conduit means (56, 57, 58, 59) comprises a plurality of connecting conduits (58, 59; 92) substantially parallel to one another, that connect corresponding intermediate regions of said curved conduit (43) and of said further curved conduit (53) . 21. Mould according to claim 18 or 19, wherein said connecting conduit means (56, 57, 58, 59) comprises a third connecting conduit (58) and a fourth connecting conduit (59) converging on a central zone (60) of said further curved conduit (53) .
22. Mould according to any one of claims 10 to 14, wherein said conduit means (4) comprises a further inlet conduit (51) and a further outlet conduit (52), through said further inlet conduit (51) and said further outlet conduit (52) said cooling fluid may respectively enter and exit from said further curved conduit (53) .
23. Mould according to claim 22, as appended to claim 12 or 13, wherein said further inlet conduit (51) and said further outlet conduit (52) are interceptable by said further common plane.
24. Mould according to claim 22 or 23, wherein said conduit means (4) comprises a first connecting conduit (54) that connects said further inlet conduit (51) to an end of said inlet conduit (41) opposite said supply portion

(41a) .
25. Mould according to claim 24, wherein said conduit means (4) comprises a second connecting conduit (55) that connects said further outlet conduit (52) to a further end of said outlet conduit (42) opposite said discharge portion (42a) .
26. Mould according to claim 25, wherein said first connecting conduit (54) and said second connecting conduit (55) are substantially orthogonal to said common plane (40) .
27. Mould comprising at least two die parts (2), each die part (2) comprising a recess (71) for forming a portion of an object and conduit means (4) through which a cooling fluid can flow, said conduit means (4) comprising a cooling conduit (143; 243) which surrounds said recess (71), an inlet conduit (41) which leads into said cooling conduit (143; 243) and an outlet conduit (42) which leaves said cooling conduit (143; 243), characterised in that said cooling conduit (143; 243) extends wavily around said recess (71).
28. Mould according to claim 27, wherein said cooling conduit (143) extends as a sequence of curved waves (47, 48) .
29. Mould according to claim 27, wherein said cooling conduit (243) extends as a sequence of square or rectangular waves (43a, 43b, 43c) .
30. Mould according to any one of claims 27 to 29, wherein said cooling conduit (143; 243) is interceptable by a substantially cylindrical surface.
31. Mould according to any one of claims 27 to 30, wherein said inlet conduit (41) and said outlet conduit (42) are interceptable by a common plane (40) .
32. Mould according to claim 31, as appended to claim 30, wherein said substantially cylindrical surface extends around an axis (Z) substantially orthogonal to said common plane (40) .
33. Mould according to any one of claims 27 to 32, wherein said conduit means (4) comprises a supply section (45) that connects said inlet conduit (41) to a supply (I) of said cooling fluid.
34. Mould according to claim 33, wherein said supply section

(45) is substantially perpendicular to said inlet conduit (41) .
35. Mould according to any one of claims 27 to 34, wherein said conduit means (4) comprising a discharge section

(46) that connects said outlet conduit (42) to an outlet (U) of said cooling fluid.
36. Mould according to claim 35, wherein said discharge section (46) is substantially perpendicular to said outlet conduit (42).
37. Mould comprising at least two die parts (2), each die part (2) comprising a recess (71) for forming a portion of an object and cooling conduit means (144) through which a cooling fluid can flow, said cooling conduit means (144) extending around said recess (71) at least on two distinct levels (140, 150), characterised in that said cooling conduit means (144) comprises a sequence of rectilinear conduits (147, 148, 149, 151, 155, 156) .
38. Mould according to claim 37, wherein in each die part (2) an inlet conduit (141) and an outlet conduit (142) are obtained, through said inlet conduit (141) and said outlet conduit (142) said cooling fluid may respectively enter and exit from said cooling conduit means (144) . 39. Mould according to claim 38, wherein said sequence of rectilinear conduits (147, 148, 149, 151, 155, 156) comprises a first conduit (147) and a second conduit (148), arranged near said recess (70) and connected to said inlet conduit (141) and to said outlet conduit (142) .
40. Mould according to claim 39, wherein said inlet conduit

(141), said outlet conduit (142), said first conduit (147) and said second conduit (148) are arranged substantially at a first level (140) of said two distinct levels (140, 150) .
41. Mould according to claim 39 or 40, wherein said succession of rectilinear conduits (147, 148, 149, 151, 155, 156) comprises a further first conduit (149) and a further second conduit (151) arranged near said recess (71) substantially at a second level (150) of said two distinct levels (140, 150) .
42. Mould according to claim 41, as appended to claim 40, wherein said second level (150) is arranged above said first level (140) .
43. Mould according to claim 41 or 42, wherein said sequence of rectilinear conduits (147, 148, 149, 151, 155, 156) comprises a joining conduit (155) that connects said first conduit (147) and said further first conduit (149), and a further joining conduit (156) that connects said second conduit (148) and said further second conduit (151) .
44. Mould according to claim 43, wherein said joining conduit (155) is substantially perpendicular to said first conduit (147) and to said further first conduit (149) .
45. Mould according to claim 43 or 44, wherein said further joining conduit (156) is substantially perpendicular to said second conduit (148) and to said further second conduit (151) .
46. Mould according to any one of claims 38 to 45, wherein in each of said die parts (2) a supply section (145) and a discharge section (146) are obtained, said supply section (145) connecting said inlet conduit (141) to a supply (I) of said cooling fluid and said discharge section (146) connecting said outlet conduit (142) to an outlet (U) of said cooling fluid.
47. Mould according to claim 46, wherein said supply section

(145) and said discharge section (146) are substantially perpendicular to said inlet conduit (141) and to said outlet conduit (142) .
48. Mould according to claim 46 or 47, wherein said supply section (145) and said discharge section (146) are substantially rectilinear.
49. Mould according to any one of claims 46 to 48, as claim 46 is appended to any one of claims 39 a 45, wherein said supply section (145) is arranged at an end of said inlet conduit (141) opposite a further end of said inlet conduit (141) which is connected to said first conduit (147) .
50. Mould according to any one of claims 46 to 49, as claim 46 is appended to any one of claims 39 to 45, wherein said discharge section (146) is arranged at an end of said outlet conduit (142) opposite a further end of said outlet conduit (142) which is connected to said second conduit (148) .
51. Mould according to any one of claims 38 to 50, wherein said inlet conduit (141) and said outlet conduit (142) are substantially rectilinear.
52. Mould according to any preceding claim, wherein said recess (71) is delimited by a forming surface (70) shaped in such a way as to form a portion of a threaded neck of a container preform.
53. Mould comprising punch means (6) provided with inner forming means (61; 125) and with outer forming means (62; 225) that are movable with respect to one another, said punch means (6) comprising passage means (8) through which a cooling fluid can flow, characterised in that said passage means (8) comprises first conduit means (19; 119) made in said inner forming means (61;

125) and second conduit means (20; 120) made in said outer forming means (62; 225) .
54. Mould according to claim 53, wherein said first conduit means (19; 119) is in fluid communication with said second conduit means (20; 120).
55. Mould according to claim 54, wherein said first conduit means (19; 119) comprises delivery conduit means (31; 131, 231) through which said cooling fluid can flow from said inner forming means (61; 125) in said outer forming means (62; 225) and return conduit means (34; 134) through which said cooling fluid can flow from said outer forming means (62; 225) in said inner forming means ( 61 ; 125) .
56. Mould according to claim 55, wherein said delivery conduit means comprises a plurality of delivery conduits (31; 131, 231) distributed around a longitudinal axis (Zl) of said punch means (6) and said return conduit means comprises a plurality of return conduits (34; 134) distributed around said longitudinal axis (Zl).
57. Mould according to claim 56, wherein the delivery conduits of said plurality of delivery conduits (31; 131, 231) are interceptable by a first common plane.
58. Mould according to claim 57, wherein the return conduits of said plurality of return conduits (34; 134) are interceptable by a second common plane.
59. Mould according to claim 58, wherein said first common plane and said second common plane are substantially parallel .
60. Mould according to claim 59, wherein said first common plane and said second common plane are substantially orthogonal to said longitudinal axis (Zl).
61. Mould according to any one of claims 56 to 60, wherein the delivery conduits (31; 131, 231) of said plurality of delivery conduits are angularly equidistant.
62. Mould according to any one of claims 56 to 61, wherein the return conduits (34; 134) of said plurality of return conduits are angularly equidistant.
63. Mould according to any one of claims 56 to 62, wherein the delivery conduits (31; 131, 231) of said plurality of delivery conduits are staggered with respect to the return conduits (34; 134) of said plurality of return conduits .
64. Mould according to any one of claims 56 to 63, wherein said second conduit means (20) comprises a plurality of refrigerating conduits (44) each of which receives said cooling fluid from a respective delivery conduit (31) of said plurality of delivery conduits and delivers said cooling fluid to a respective return conduit (34) of said plurality of return conduits.
65. Mould according to claim 64, wherein the refrigerating conduits (44) of said plurality of refrigerating conduits are arranged in sequence around said longitudinal axis (Zl).
66. Mould according to claim 65, wherein said refrigerating conduits (44) are equidistant to one another around said longitudinal axis (Zl) .
67. Mould according to any one of claims 64 to 66, wherein each refrigerating conduit (44) of said plurality of refrigerating conduits comprises an inlet portion (64) in fluid communication with said respective delivery conduit (31), an outlet portion (67) in fluid communication with said respective return conduit (34) and a joining portion (66) arranged transversely to said inlet portion (64) and to said outlet portion (67) and interposed between said inlet portion (64) and said outlet portion (67).
68. Mould according to claim 67, wherein said inlet portion

(64) is shorter than said outlet portion (67).
69. Mould according to claim 67 or 68, wherein said inlet portion (64) and said outlet portion (67) are substantially parallel to said longitudinal axis (Zl).

70. Mould according to any one of claims 67 to 69, wherein said joining portion (66) extends along a circumference arc .
71. Mould according to claim 70, wherein the joining portions (66) of each refrigerating conduit (44) extend along arcs of a common circumference.
72. Mould according to claim 71, wherein said common circumference is intersected by a plane substantially perpendicular to said longitudinal axis (Zl) and is centred on said longitudinal axis (Zl).

73. Mould according to any one of claims 67 to 72, wherein each refrigerating conduit (44) of said plurality of refrigerating conduits comprises a first transverse portion (49) which extends transversely to said inlet portion (64) so as to connect said inlet portion (64) to said respective delivery conduit (31).
74. Mould according to claim 73, wherein each refrigerating conduit (44) of said plurality of refrigerating conduits comprises a second transverse portion (68) which extends transversely to said outlet portion (67) so as to connect said outlet portion (67) to said respective return conduit (34) .
75. Mould according to any one of claims 56 to 74, wherein on an outer surface (33) of said inner forming means (61; 125) a plurality of grooves is obtained which defines a plurality of channels (32; 132) each of which connects a delivery conduit (31; 131, 231) of said plurality of delivery conduits to said second conduit means (20; 120) .
76. Mould according to claim 75, wherein each delivery conduit (31; 131, 231) of said plurality of delivery conduits leads into an end region (106) of a respective channel (32; 132) of said plurality of channels.
77. Mould according to claim 75 or 76, as claim 75 is appended to claim 73 or 74, wherein said first transverse portion (49) faces a corresponding channel (32) of said plurality of channels.
78. Mould according to any one of claims 75 to 77, wherein on said outer surface (33) a plurality of further grooves is obtained which defines a plurality of further channels (36; 136) each of which connects said second conduit means (20; 120) to a return conduit (34; 134) of said plurality of return conduits.
79. Mould according to claim 78, wherein each return conduit (34; 134) of said plurality of return conduits leads into an end zone (37) of a respective further channel (36; 136) of said plurality of further channels.
80. Mould according to claim 78 or 79, wherein the channels

(32; 132) of said plurality of channels and the further channels (36; 136) of said plurality of further channels have a length, measured along said longitudinal axis

(Zl), at least equal to a stroke (H) of said outer punch means (62; 225) with respect to said inner punch means

(61; 125) along said longitudinal axis (Zl).
81. Mould according to claim 80, wherein the channels (32; 132) of said plurality of channels and the further channels (36; 136) of said plurality of further channels are substantially parallel to said longitudinal axis (Zl) .
82. Mould according to any one of claims 78 to 81, wherein the channels (32; 132) of said plurality of channels are staggered around said longitudinal axis (Zl) with respect to the further channels (36; 136) of said plurality of further channels.
83. Mould according to any one of claims 78 to 82, as claim 75 is appended to claim 74, wherein said second transverse portion (68) faces a corresponding further channel (36) of said plurality of further channels.
84. Mould according to any one of claims 56 to 83, wherein said delivery conduit means (31; 131, 231) is in fluid communication with an inlet conduit (28; 128) arranged along said longitudinal axis (Zl), said inlet conduit (28; 128) connecting said delivery conduit means (31; 131, 231) with a supply of said cooling fluid.
85. Mould according to claim 84, wherein said inlet conduit (28) leads into an inlet chamber (29) arranged inside said inner forming means (61) .
86. Mould according to any one of claims 56 to 85, wherein said first conduit means (19; 119) comprises a discharge conduit (39; 139) in fluid communication with said return conduit means (34; 134) so as to connect said return conduit means (34; 134) with an outlet of said cooling fluid.
87. Mould according to claim 86, wherein said discharge conduit (39) is in fluid communication with an outlet chamber (38) arranged inside said inner forming means (61).
88. Mould according to claim 87, as claim 86 is appended to claim 85, wherein said inlet chamber (28) and said outlet chamber (39) are mutually in fluid communication by means of a plurality of longitudinal grooves (109) obtained on a sleeve (32) arranged inside an inner forming element (25) of said inner forming means (61) .

89. Mould according to any one of claims 53 to 88, wherein said inner forming means (61; 125) and said outer forming means (62; 225) are coaxial to one another.
90. Mould according to any one of claims 53 to 89, wherein said inner forming means (61) is fixed and said outer forming means (62) is movable.
91. Mould according to any one of claims 53 to 90, and further comprising die means (7) interacting with said punch means 6) for shaping a cap (5) by moulding plastics .
92. Mould according to claim 91, wherein, in a forming position, between said inner forming means (61) and said outer forming means (62) a recess is defined in which a sealing lip (15) of said cap (5) may be formed, said sealing lip (15) being provided with an undercut (108).

93. Mould according to claim 92, wherein said inner forming means (61) comprises a first forming element (125) and a second forming element (225) which surrounds said first forming element (125), said second forming element (225) interacting with said outer forming means (62) for defining said recess.
94. Mould according to claim 93, wherein said first forming element (125) is movable with respect to said second forming element (225) .
95. Mould according to any one of claims 92 to 94, wherein said outer forming means (62) is shaped so as to form an inner thread (14) of said cap (5) .
96. Method for producing a mould element (2; 62) provided with conduit means (4; 20) through which a cooling fluid can flow, said method comprising the following steps:
providing a first component (69; 74) and a second component (73; 94) of said mould element (2; 62), said first component (69; 74) being provided with precursor means of said conduit means (4; 20) comprising open channel means (83, 84, 85; 90, 91, 92; 96, 97, 98);
joining said first component (69; 74) and said second component (73; 94), so that a surface of said second component (73; 94) faces said open channel means (83, 84, 85; 90, 91, 92; 96, 97, 98) to define therewith said conduit means (4; 20) .
97. Method according to claim 96, wherein said providing comprises forming said first component (69; 74) through Metal Injection Moulding.
98. Method according to claim 97, wherein said forming comprises moulding said first component (69; 74) from a mixture of metal powders and plastic binder.
99. Method according to claim 98, wherein said open channel means (83, 84, 85; 90, 91, 92; 96, 97, 98) is obtained during said moulding.
100. Method according to any one of claims 97 to 99, wherein said providing comprises further forming said second component (73; 94) through Metal Injection Moulding.
101. Method according to claim 100, as appended to claim 98 or 99, wherein said further forming comprises further moulding said second component (73; 94) from a further mixture of metal powders and plastic binder.
102. Method according to claim 101, wherein said mixture and said further mixture have the same composition.
103. Method according to any one of claims 96 to 102, wherein said joining comprises introducing a fixing substance (89) between said first component (69; 74) and said second component (73; 94).
104. Method according to claim 103, as appended to claim 102, wherein said fixing substance (89) has a composition substantially equal to said mixture and to said further mixture .
105. Method according to claim 103, wherein said fixing substance (89) comprises an adhesive substance.
106. Method according to claim 103, wherein said fixing substance (89) comprises a brazing substance.
107. Method according to any one of claims 103 to 106, wherein said fixing substance (89) is introduced into hole means (87) of said first component (69; 74), said hole means (87) communicating with further hole means (86) of said second component (73; 94) .
108. Method according to any one of claims 103 to 107, wherein said fixing substance (89) is introduced into an interspace (88) defined between said first component (69; 74) and said second component (73; 94) .
109. Method according to any one of claims 96 to 108, wherein said joining comprises positioning a component (74) selected between said first component (69; 74) and said second component (73; 94) in a housing (79) obtained in an another component (73) selected between said second component (73; 94) and said first component (69; 74) .

110. Method according to claim 109, as appended to claim 108, wherein said interspace (88) is defined between said component (74) and an edge (78) projecting from said another component (73) and delimiting said housing (78) . 111. Method according to claim 110, wherein said component (74) is provided with a perimeter zone surrounded by said interspace (88).
112. Method according to any one of claims 96 to 111, wherein said joining comprises making integral said first component (69; 74) with said second component (73; 94) by means of a third component (75) arranged in contact with said first component (69; 74) and with said second component (73; 94) .
113. Method according to claim 112, wherein said third component (75) is obtained through Metal Injection Moulding.
114. Method according to claim 113, as appended to any one of claims 103 to 108, or 110, or 111, or to claim 109 as appended to any one of claims 103 to 108, wherein said joining comprises injecting said fixing substance (89) in an auxiliary mould which houses said first component (69; 74) and said second component (73; 94), so that said fixing substance (89) forms said third component (75) .
115. Method according to claim 114, and further comprising subjecting said first component (69; 74), together with said second component (73; 94) and said third component (75) to a dewaxing process.
116. Method according to claim 114 or 115, and further comprising subjecting said first component (69; 74), together with said second component (73; 94) and said third component (75) to a sintering process.
117. Method according to any one of claims 96 to 116, wherein said mould element (2; 62) is a die part (2) for obtaining by moulding a threaded neck of a container preform.
118. Method according to any one of claims 96 to 116, wherein said mould element (2; 62) is a punch part (62) suitable for obtaining by moulding an inner portion (14, 15) of a cap (5) .