Mono and multi-layer articles and compression methods of making the same
In preferred embodiments methods and apparatuses can produce articles that have formable material. The articles may be mono and multilayer. The articles can be formed by various methods.
1 . A method of forming at least a portion of a preform or closure comprising:
producing lamellar material;
depositing said lamellar material in a mold cavity section; and
moving a core section having a core relative to the mold cavity section to compress the lamellar material between the core and the mold cavity section, the core section and the mold cavity section having an open and a closed position, the core and the mold cavity section cooperate to define a cavity in the shape of at least a portion of a preform or closure when in the closed position.
2 . The method of claim 1 , wherein the lamellar material is deposited into the mold cavity section by an extruder output positioned above the mold cavity section.
3 . The method of claim 1 , wherein the lamellar material is deposited into the mold cavity section by injecting lamellar material through an injection gate and into the mold cavity section.
4 . The method of claim 1 , wherein the core is moved relative to the mold cavity section to compress the lamellar material after the lamellar material is deposited into the mold cavity.
5 . The method of claim 1 , wherein the core section is moved along a line of action relative to the mold cavity section to compress the lamellar material, the lamellar material comprises a plurality of microlayers, and a substantial portion of layers of the plurality of microlayers is substantially perpendicular to the line of action when the lamellar material is deposited into the mold cavity section.
6 . The method of claim 1 , wherein the lamellar material comprises a plurality of microlayers that are generally parallel to one another after the lamellar material is compressed into the shape of a preform.
7 . The method of claim 1 , wherein the lamellar material comprises a barrier material.
8 . The method of claim 1 , wherein the core and the mold cavity section compress the lamellar material as the core is inserted and advanced into the mold cavity section to the closed position.
9 . The method of claim 1 , wherein the lamellar material is delivered simultaneously to a plurality of mold cavity sections.
10 . The method of claim 1 , wherein the lamellar material is delivered to a first set of cavity sections for a first time period and another set of cavity sections for another time period.
11 . A compression molding system for producing multilayer articles, the system comprising:
a mandrel movable between an open position and a closed position;
a mold cavity configured to receive the mandrel, the mold cavity and the mandrel cooperate to define a cavity in a shape of a preform; and
a material source configured to drop lamellar material suitable for molding into the mold cavity.
12 . A method of forming at least a portion of a preform, the method comprising:
producing foam material;
depositing said foam material in a mold cavity section, the foam material expanding in the mold cavity section;
providing a core and a mold cavity section having an open and closed position, the core and mold cavity section cooperate to define a cavity in the shape of at least a portion of a preform when in the closed position; and
after depositing the foam material into the mold cavity section, moving the core into the mold cavity section and compressing the foam material therebetween to form at least a portion of a preform.
13 . The method of claim 12 , wherein the foam material comprises expandable microspheres.
14 . The method of claim 12 , wherein the foam material in the cavity is cooled and forms a layer of a multilayer preform.
15 . The method of claim 12 , wherein the foam material is compressed between a substrate preform held by the core and a surface of the cavity section to form a layer of foam material on the substrate preform.
16 . The method of claim 12 , wherein the foam material is compressed between the core and an interior surface of a substrate preform positioned in the cavity section to form a layer of foam material on the substrate preform.
17 . The method of claim 12 , wherein the foam material is delivered simultaneously to a plurality of cavity sections.
18 . The method of claim 12 , wherein the foam material is delivered to a first set of cavity sections for a first time period and another set of cavity sections for another time period.
19 . A method of forming a preform comprising:
providing a first core and a first mold cavity section that cooperate to define a first cavity in the shape of at least a portion of a preform when in a closed position;
producing a first melt;
depositing said first melt in the first mold cavity section;
moving the first core relative to the first mold cavity section to compress the first melt to form at least a portion of a preform;
moving the first core out of the first mold cavity section;
producing a second melt; and
compressing the second melt between the at least a portion of the preform and one of a second core and a second mold cavity section.
20 . The method of claim 19 , further comprising:
providing a first turntable comprising the first core and the first mold cavity section and a second turntable comprising the one of the second core and the second mold cavity section; and
transporting the at least a portion of the preform from the first turntable to the second turntable.
21 . The method of claim 20 , wherein the first turntable is rotatable about a first axis and comprises a plurality of first cores and a plurality of first mold cavity sections, each first core is moveable relative to a corresponding first mold cavity section between an open position and a closed position, and the plurality of first mold cavity sections are arranged in a circular pattern.
22 . The method of claim 20 , wherein the second turntable is rotatable about a second axis and comprises a plurality of second cores and a plurality of second mold cavity sections, each second core is moveable relative to a corresponding second mold cavity section between an open position and a closed position, and the plurality of second mold cavity sections are arranged in a circular pattern.
23 . The method of claim 19 , wherein the second melt is deposited into the at least a portion of a preform that is positioned in the first mold cavity section, and advancing the second core into the at least a portion of a preform to compress the second melt to form a layer over the at least a portion of the preform.
24 . The method of claim 19 , further comprising:
removing the at least a portion of the preform from the first cavity section;
depositing the second melt into the second cavity section; and
advancing the at least a portion of the preform into the second cavity portion to compress the second melt to form a layer over the at least a portion of the preform.
25 . The method of claim 19 , further comprising:
rotating a turntable that comprises a plurality of first cavity sections; and
rotating a plurality of first cores in unison with the plurality of first cavity sections as the first melt is compressed.
26 . The method of claim 19 , further comprising:
rotating a turntable that comprises a plurality of second cavity sections; and
rotating a plurality of second cores in unison with the plurality of second cavity sections as the first melt is compressed.
27 . The method of claim 19 , wherein the first melt is selected from a group consisting of foam material and lamellar material.
28 . The method of claim 19 , wherein the second melt is selected from a group consisting of foam material and lamellar material.
29 . The method of claim 19 , wherein at least one of the first melt and second melt is selected from a group consisting of foam material, lamellar material, and combinations thereof.
30 . The method of claim 19 , wherein the second melt is molded over the at least a portion of a preform formed of the first material, and the second melt comprises foam.
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41 . A system for molding multilayer articles, the system comprising:
a first molding system comprising a plurality of first cores, a plurality of first cavity sections, and a first source of first material comprising a first output positioned to deliver a first material to at least one of the first cavity sections, the first cores being movable between an open position and a closed position, the first cores are positioned within corresponding first cavity sections when the first cores are in a closed position after the first material is positioned in the corresponding first cavity sections;
a second molding system comprising a plurality of second cores, a plurality of second cavity sections, and a second source of second material comprising a second output positioned to deliver a second material to at least one of the second cavity sections, the second cores being movable between an open position and a closed position; and
a transport system configured to transport preforms from the first molding system to the second molding system.
42 . The system of claim 41 , wherein the first and second molding systems each comprise a turntable and the transport system is positioned between turntables, the transport system comprises at least one starwheel system.