WO2004106035A2 - Elements de moulage creux en nickel destines a etre utilises dans le moulage par soufflage - Google Patents

Elements de moulage creux en nickel destines a etre utilises dans le moulage par soufflage Download PDF

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Publication number
WO2004106035A2
WO2004106035A2 PCT/CA2004/000804 CA2004000804W WO2004106035A2 WO 2004106035 A2 WO2004106035 A2 WO 2004106035A2 CA 2004000804 W CA2004000804 W CA 2004000804W WO 2004106035 A2 WO2004106035 A2 WO 2004106035A2
Authority
WO
WIPO (PCT)
Prior art keywords
mold member
mold
wall
hollow
member according
Prior art date
Application number
PCT/CA2004/000804
Other languages
English (en)
Other versions
WO2004106035A3 (fr
Inventor
Michael J. Ryan
Reinhart Weber
Original Assignee
Ryka Molds Inc.
Weber Manufacturing Limited
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
Priority claimed from CA002430546A external-priority patent/CA2430546A1/fr
Application filed by Ryka Molds Inc., Weber Manufacturing Limited filed Critical Ryka Molds Inc.
Publication of WO2004106035A2 publication Critical patent/WO2004106035A2/fr
Publication of WO2004106035A3 publication Critical patent/WO2004106035A3/fr

Links

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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/4823—Moulds with incorporated heating or cooling 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • 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
    • B29C33/30—Mounting, exchanging or centering
    • B29C33/305—Mounting of moulds or mould support plates
    • 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
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/565—Consisting of shell-like structures supported by backing material
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16—Cooling
    • B29C2035/1616—Cooling using liquids
    • 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
    • B29C49/24—Lining or labelling
    • B29C2049/2412—Lining or labelling outside the article
    • 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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/4823—Moulds with incorporated heating or cooling means
    • B29C2049/4825—Moulds with incorporated heating or cooling means for cooling moulds or mould parts
    • 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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C2049/4856—Mounting, exchanging or centering moulds or parts thereof
    • 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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C2049/4856—Mounting, exchanging or centering moulds or parts thereof
    • B29C2049/4864—Fixed by a special construction to the mould half carriers, e.g. using insulating material between the mould and the mould half carrier
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • 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
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04—Extrusion blow-moulding
    • 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
    • B29C49/24—Lining or labelling
    • 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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/50—Moulds having cutting or deflashing 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/62—Venting means
    • 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
    • B29L2031/46—Knobs or handles, push-buttons, grips
    • B29L2031/463—Grips, handles
    • 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
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles

Definitions

  • This invention relates to blow molding, and in particular, to molds for producing hollow molded articles of plastics material.
  • This flow of coolant fluid which may be, for example, water or air, serves to set the article of plastics material after the blow molding thereof within the mold cavities in the mold members.
  • the coolant fluid flow passages may also serve for the flow of heating fluid to heat the mold or portions of it during the blow molding process.
  • the mold member itself is a hollow body made of nickel, with inlet and outlet ports therein for the flow of coolant fluid through the mold member.
  • a mold member for use in blow molding articles of plastics material, the mold member comprising a hollow body having an inner wall defining a mold cavity and an integral outer wall joined thereto to define a hollow interior between the inner wall and the outer wall.
  • the outer wall defines therein an inlet port for admission of coolant fluid into the hollow interior and an outlet port for exhausting coolant fluid from the hollow interior.
  • the mold member is formed of nickel.
  • Figure 1 is a perspective view of a mold member according to a preferred embodiment of the present invention looking toward the inner wall;
  • Figure 2 is a plan view of the mold member of Figure 1 ;
  • Figure 3 is a perspective view of the mold member of Figure 1 looking toward the outer wall;
  • Figure 4 is a plan view of the of the mold member as seen in Figure 3;
  • Figure 5 is a side view of the mold member
  • Figure 6 is an end view of the mold member as viewed in the direction of the arrow 6 in Figure 3;
  • Figure 7 is an end view of the mold member as viewed in the direction of the arrow 7 in Figure 3;
  • Figure 8 is a cross-sectional view taken along the lines 8-8 in Figures 1 and Figure 9 is an enlarged cross-sectional view taken along lines 9-9 in Figure 2;
  • Figure 10 is an enlarged cross-sectional view taken along lines 10-10 in Figure 2;
  • Figure 11 is an enlarged cross-sectional view taken along lines 11-11 in
  • Figure 12 is a view corresponding to Figure 2 but with the mold member secured to an associated holder;
  • Figure 13 is a side view in the direction of arrow 13 in Figure 12;
  • Figure 14 is an end view in the direction of the arrow 14 in Figure 12;
  • Figure 15 is a cross-sectional view taken along lines 15-15 in Figure 12;
  • Figure 16 is an enlarged cross-sectional view taken along lines 16-16 in Figure 12;
  • Figure 17 is an enlarged cross-sectional view taken along lines 17-17 in Figure 12;
  • Figure 18 is a perspective view similar to Figure 1 , but showing another preferred embodiment of the present invention used to extrusion blow mold handleware products;
  • Figure 19 is a perspective view of the mold member shown in Figure 18 looking toward the outer wall;
  • Figure 20 is a diagrammatic perspective view of another preferred embodiment of the present invention used to produce stretch blow molded articles
  • Figure 21 is a perspective view, partly broken away, of the embodiment shown in Figure 20, but without the bottom mold member in place;
  • Figure 22 is a perspective cross-sectional view taken along lines 22-22 of Figure 21 ;
  • Figure 23 is a perspective view of the mold member shown in Figures 20 to 22 looking toward the outer wall.
  • mold member 20 denotes generally a mold member for use in blow molding articles of plastics material, particularly, in an extrusion blow molding process.
  • Mold member 20 is in the form of a hollow body having an inner wall 22 which defines a mold cavity 24.
  • the mold member 20 also has an outer wall 26 which includes peripheral side walls 28 and end walls 30.
  • a hollow interior 32 (see Figure 8) is provided between the inner wall 22 and the outer wall 26 of the mold member 20.
  • the mold member 20 is made of nickel formed by nickel vapor deposition on cavity walls of closed master mold members or mandrels (not shown).
  • nickel tetracarbonyl gases - Ni(Co) 4 - decomposes into pure metallic nickel and carbon monoxide, and the nickel is deposited on heated cavity walls of the closed master mold members or mandrels, with the amount of nickel which is so deposited on these cavity walls determining the thickness of the inner wall 22 and the outer wall 26 of the mold member 20.
  • the wall thickness typically ranges between 2 and 6 millimetres, depending on the size of the mold.
  • the outer wall 26 of the mold member 20 is provided with at least one inlet port 34 for admission of coolant fluid which may, for example, be water or air to the hollow interior 32 of the mold member 20, and with at least one outlet port 36 for exhausting this coolant fluid from the hollow interior 32.
  • coolant fluid which may, for example, be water or air
  • outlet port 36 for exhausting this coolant fluid from the hollow interior 32.
  • These inlet and outlet ports 34, 36 are the same ports used to make mold member 20 in the nickel vapor deposition process. The location of such ports is chosen to obtain uniform mold wall thickness in the nickel vapor deposition process, and also to obtain uniform cooling of mold member 20 in the blow molding process.
  • coolant as used herein is intended to include both heating and cooling fluids, and both liquids and gases.
  • the inner wall 22 of the mold member 20 has an inner face 38, sometimes referred to as the parting line, with a slightly recessed portion 40 (see Figure 1 ) extending along and communicating with each lateral edge 42 of the mold cavity 24.
  • These slightly recessed portions 40 which vary in the depth between .0015 and .004 inches, each include further recessed grooving or grooves 44 which typically is between 0.020 and 0.030 inches deep.
  • recessed grooves 44 includes finger grooves 46, with the grooving 44 extending to the peripheral side edges 48 of the parting line inner face 38 of the inner wall 22 of the mold member 20.
  • Recesses 40 and grooves 44, 46 permit venting or exhaustion of air from within the mold cavity 24 during blow molding therein of articles of plastics material as hereinafter more fully described.
  • the mold member 20 may, during the manufacture thereof, be provided with at least one orifice 50 which, as seen best in Figure 8, preferably includes a threaded insert 52 of, for example, steel, which is encapsulated in the nickel during the nickel vapor deposition formation of the mold member 20. Insert 52 is provided to attach a vacuum line thereto.
  • the inner portion of the orifice 50 holds a porous vent plug 54 which is added later to retain a printed label 21 of plastics material against the wall of the mold cavity 24 by the application of a low vacuum to the orifice 50. This is referred to as in-mold labelling.
  • This printed label is integrally incorporated into the article of plastics material during the blow molding thereof.
  • vent plug 54 can be used for venting or exhausting air from the mold during the blow molding process, or it could be replaced by a non-porous plug or a plug containing a date stamp or logo. Any number of plugs 54, or none at all, can be used in mold member 20 at any location desired.
  • the encapsulated inserts 52 and plugs 54 are referred to herein as integral connector assemblies 55 that extend between the mold member inner and outer walls 22, 26 and they also provide support therebetween.
  • the outer wall 26 may optionally be formed with at least one additional hollow support 56 which is of generally frusto-conical form and extends across the hollow interior 32 of the mold member 20.
  • Supports 56 are integrally joined with the inner wall 22.
  • the supports 56 serve to reinforce the mold member 20 and prevent the mold walls from collapsing together during the blow molding process, and supports 56 also operatively cause cooling fluid flow augmentation, such as turbulence, in the coolant fluid flow within the hollow interior 32.
  • cooling fluid flow augmentation such as turbulence
  • the outer wall 26 adjacent to the mold cavity 24 may be provided with grooves 58 (see Figure 3) which protrude into the hollow interior 32 of the mold member 20.
  • Turbulence in the coolant fluid flow within the hollow interior 32 of the mold member 20 may be desirable to ensure substantially uniform cooling of the article of plastics material after the blow molding thereof, and also to ensure substantially uniform heating of the article of plastics material during the blow molding thereof if the hollow interior 32 is also used for flow of a heating fluid to heat portions of the mold during the blow molding thereof. If heating is required, heating elements (not shown) can also be encapsulated into mold member 20 during the nickel vapor deposition process. In this manner, undesirable hot spots or cold spots during the molding of the article of plastics material in the blow molding process, and the subsequent cooling of the article after the blow molding thereof, can be avoided.
  • the mold member 20 is operatively releasably secured to a holder which is denoted generally by the reference numeral 60 and which may be formed of aluminum.
  • the mold member 20 is preferably provided during the manufacture thereof with stand-offs 61 (see Figure 9), each having a shouldered recess 62, as seen best in Figures 2, 9, 12 and 15.
  • Recess 62 is preferably of tapered form, there being six such recesses 62 in the preferred embodiment shown in the drawings.
  • Cap screws 64 are located in recesses 62 and screwed into threaded bores 66 in holder 60 to retain mold member 20 in holder 60.
  • holder 60 has protruding locator pins 68 mounted therein at appropriate locations.
  • Locator pins 68 have tapered ends 70 that engage tapered recesses 72 formed in steel bushings 74 encapsulated into mold member 20 during the nickel vapor deposition process of making mold member 20.
  • the pins 68 and bushings 74 accurately position the mold member 20 in the holder 60, or in other words, provide for the shell registration of mold member 20 in holder 60.
  • the mold member 20 is formed during the manufacture thereof, as hereinbefore described, with encapsulated steel bushings 76 having tapered entrance portions 78 and threaded central portions 79 adapted to threadably receive locator pins 80 (see Figure 15).
  • Locator pins 80 have opposed flats 82 to assist in gripping them and threading them into bushings 76.
  • Pins 80 can be mounted in either of the mating mold members 20, and they serve to ensure accurate alignment of the mold members 20, to maintain them in registration as the blow mold opens and closes during a blow molding operation.
  • holder 60 is formed with bleed- off passages 84 to get rid of any stray plastics material that may be pushed through the bushing 76 by the locator pins 80.
  • holder 60 is formed with coolant inlet passages 86 that communicate with the mold member inlet ports 34, and coolant outlet passages 88 that communicate with the mold member outlet ports 36.
  • mold member 20 has another encapsulated sleeve 90 to accommodate a brass bushing 92, which in turn accepts a knock-out or punch (not shown) to assist in the removal of the blown container from the mold.
  • the mold member 20 together with the associated holder 60 are mounted with a complementary mold member 20' (only a portion of which is shown in Figure 15) together with its associated holder such that by actuation of the holders the mold members 20 and 20' may be moved between a closed condition in which the inner faces 38 of the inner walls 22 thereof are in abutting contact, and an open condition in which these inner faces 38 of the inner walls 22 thereof are separated.
  • the mold member 20' normally is of corresponding form to the mold member 20 as described above, except that it is a mirror image thereof.
  • the mold cavities 24 could be different in the two half mold members 20, 20', if it is desired to produce a blow molded article that is not symmetrical.
  • mold members 20 are used for extrusion blow molding, where the article may be formed by continuous blow molding in which a tube of the plastics material is inserted between the mold cavities 24 of the mold members 20 and 20' while these mold members 20 and 20' are in the open condition.
  • the free end of the tube of plastics material extends beyond the base end 94 of the mold cavities 24 at which the inner face of the inner wall 22 of one or both of the mold members 20 and 20' presents a knife edge 96, so that when the mold members 20 and 20' are moved to the closed condition and the tube of plastics material is at its softening temperature, the free end portion of the tube of plastics material is severed with the severed end of the tube being sealed together.
  • Similar knife edges 97 are provided at the neck portion 100 of mold member 20 for a similar purpose.
  • the inner face 38 of the inner wall 22 of each mold member 20 and 20' has recessed portions 98 and 102 for accommodating the severed free end and side portions of the tube for subsequent disposal or recycling. Pressurized air is supplied to the interior of the tube of plastics material to form this tube into the blow molded article. The article is again removed when the mold members 20 and 20' are separated subsequent to the plastics material of the finished article being set by the flow of coolant fluid through the hollow interior 32 of each mold member 20 and 20'.
  • Figures 18 and 19 show another preferred embodiment of a mold member 104 which is used for the extrusion blow molding of handleware products. Like reference numerals are used in Figures 18 and 19 to indicate components that are similar to those of the embodiments shown in Figures 1 to 17.
  • each mold member 104 is provided with an upstanding handle protrusion 106 such that when the tube of plastics material is inserted into the cavity formed by the mold cavities 24 of the mold members 104 and 104' and the mold members are thereafter moved to the closed condition, a portion of the tube of plastics material is collapsed by the handle protrusions 106.
  • This collapsed portion of the tube between the handle protrusions 106 is severed by a knife edge 108 extending around the periphery of the handle protrusion 106 of one or both of the mold members 104 and 104'.
  • This collapsed portion of the tube of plastics material which has been severed is subsequently removed and discarded or recycled after the plastics material of the finished handleware article has been set and the mold members 104 and 104' have been moved to the open condition.
  • Stretch blow mold 110 is shown mounted in a holder 112.
  • Stretch blow mold 110 is similar to mold member 20 except that mold member 110 has an open base end portion 114.
  • Base end portion 114 has an end wall 116 (see Figure 21), but the mold cavity 118 has an open bottom end portion 120.
  • Open bottom end portion 120 is closed by a base mold member 122 which is adapted to cooperate with the hollow bodies of the mating mold members 110 and 110' to form a closed stretch blow mold.
  • Holder 112 also has base members 124, 125 and 126 to hold base mold member 122 in place.
  • a parison (not shown) of the plastics material to be blow molded into the article is inserted through an opening 128 into the cavity formed by the mold cavities 118, with the parison heated to the softening temperature of the plastics material, a stretch rod (not shown) is inserted into the parison to stretch the parison. Pressurized air is then blown into the parison to form the blow molded article within the cavity constituted by the mold cavities 118. It will be appreciated that no knife edges are provided in mold members 110, because they are not needed since the parison is just blowing out to fill the mold cavities 118.
  • coolant fluid is caused to flow through the hollow interior 32 of each mold member 110 and 110' to set the plastics material of the blow molded article, and by actuation of the holders 112, 124, 125 and 126, these mold members are then separated with the finished blow molded article being removed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

L'invention porte sur des moules creux en nickel pour soufflage produits par dépôt de vapeur de nickel qui comportent une paroi interne formant une cavité de moulage et un paroi externe intégrale formant entre les deux un intérieur creux pour le fluide de refroidissement. La paroi externe possède des ports d'admission et d'évacuation pour l'admission et l'évacuation du fluide de refroidissement. Un dispositif de retenue permet de monter les moules dans une machine de moulage par soufflage.
PCT/CA2004/000804 2003-05-30 2004-05-28 Elements de moulage creux en nickel destines a etre utilises dans le moulage par soufflage WO2004106035A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA2,430,546 2003-05-30
CA002430546A CA2430546A1 (fr) 2003-05-30 2003-05-30 Elements de moule en nickel creux pour utilisation en moulage par soufflage
US10/714,419 US20040241275A1 (en) 2003-05-30 2003-11-12 Hollow nickel mold members for use in blow molding

Publications (2)

Publication Number Publication Date
WO2004106035A2 true WO2004106035A2 (fr) 2004-12-09
WO2004106035A3 WO2004106035A3 (fr) 2005-01-20

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PCT/CA2004/000804 WO2004106035A2 (fr) 2003-05-30 2004-05-28 Elements de moulage creux en nickel destines a etre utilises dans le moulage par soufflage

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102285100A (zh) * 2011-05-26 2011-12-21 张家港市同创机械有限公司 用于制造呼吸面罩的模具
FR2995551A1 (fr) * 2012-09-14 2014-03-21 Philippe Vigouroux Moule et dispositif de rotomoulage a temps de cycle reduit
EP2977165A4 (fr) * 2013-03-19 2016-11-16 Jiangsu Newamstar Packaging Machinery Co Ltd Mécanisme de changement rapide de moule
EP4234208A3 (fr) * 2019-03-20 2024-01-24 Nissei ASB Machine Co., Ltd. Procédé de fabrication d'un récipient en résine et procédé de moulage par soufflage

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3768948A (en) * 1971-12-20 1973-10-30 Monsanto Co Blow mold
US4140470A (en) * 1976-04-08 1979-02-20 Uniroyal Aktiengesselschaft Transfer molding venting system
GB2240300A (en) * 1990-01-24 1991-07-31 Metal Box Plc Blow mould having cooling channels
US5169549A (en) * 1990-06-28 1992-12-08 Nickel Tooling Technology Inc. Method of producing nickel shell molds
US5190715A (en) * 1988-09-27 1993-03-02 Ube Industries, Ltd. Blow molding process for production of hollow type articles
US5221539A (en) * 1991-03-05 1993-06-22 Peguform-Werke Gmbh Apparatus for the production of molded skins and bodies of plastic material
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EP2977165A4 (fr) * 2013-03-19 2016-11-16 Jiangsu Newamstar Packaging Machinery Co Ltd Mécanisme de changement rapide de moule
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