US20090081407A1 - Injection Molding Process for Molding Mechanical Interlocks Between Molded Components - Google Patents

Injection Molding Process for Molding Mechanical Interlocks Between Molded Components Download PDF

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Publication number
US20090081407A1
US20090081407A1 US12/160,153 US16015307A US2009081407A1 US 20090081407 A1 US20090081407 A1 US 20090081407A1 US 16015307 A US16015307 A US 16015307A US 2009081407 A1 US2009081407 A1 US 2009081407A1
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Prior art keywords
interlock
molded part
materials
injection molded
cavity
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Abandoned
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US12/160,153
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English (en)
Inventor
Jean-Pierre Giraud
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CSP Technologies Inc
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Individual
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Priority to US12/160,153 priority Critical patent/US20090081407A1/en
Assigned to CSP TECHNOLOGIES, INC. reassignment CSP TECHNOLOGIES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GIRAUD, JEAN-PIERRE, ZBIRKA, MICHEL
Assigned to WELLS FARGO BANK, NATIONAL ASSOCIATION reassignment WELLS FARGO BANK, NATIONAL ASSOCIATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CAPITOL CUPS, INC., CAPITOL INSULATED PRODUCTS, INC., CAPITOL PLASTIC PRODUCTS, L.L.C., CSP TECHNOLOGIES, INC., CV HOLDINGS, L.L.C.
Publication of US20090081407A1 publication Critical patent/US20090081407A1/en
Assigned to CV HOLDINGS, L.L.C., CSP TECHNOLOGIES, INC., CAPITOL CUPS, INC., CAPITOL PLASTIC PRODUCTS, L.L.C., Total Innovative Packaging, Inc., CAPITOL MEDICAL DEVICES, INC. (F/K/A CAPITOL INSULATED PRODUCTS, INC.) reassignment CV HOLDINGS, L.L.C. RELEASE OF SECURITY INTERESTS IN PATENTS Assignors: WELLS FARGO BANK, NATIONAL ASSOCIATION
Abandoned legal-status Critical Current

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    • 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
    • B29C37/0078—Measures or configurations for obtaining anchoring effects in the contact areas between layers
    • B29C37/0082—Mechanical anchoring
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1657—Making multilayered or multicoloured articles using means for adhering or bonding the layers or parts to each other
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1657—Making multilayered or multicoloured articles using means for adhering or bonding the layers or parts to each other
    • B29C2045/1668—Penetration bonds
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/19—Sheets or webs edge spliced or joined
    • Y10T428/192—Sheets or webs coplanar
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y10T428/24322—Composite web or sheet
    • Y10T428/24331—Composite web or sheet including nonapertured component
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component

Definitions

  • the present technology relates to a method of molding different materials to form an individual injection molded part. More particularly, the present technology relates to an injection molding method that creates a structural interlock between two different materials that allows the two different materials to be used to form a single, injection molded part.
  • Two-shot or multi-shot injection molding allows different materials having different functional properties to be molded into a single part without the need to use fasteners to join the materials together.
  • the two materials are typically joined to each other by means of a weld defined by the interface solidification of melted portions of the two materials.
  • the different materials In order to form such a weld, however, the different materials must be chemically similar or compatible. This limits the selection of materials that can be used to fabricate the molded part.
  • One aspect of the present technology is directed to a method of molding that creates a structural interlock between two different materials.
  • Another aspect of the present technology is directed to an injection molding process that employs design characteristics that enable mechanical interlocking to occur between dissimilar materials without the use of fasteners or adhesives.
  • a further aspect of the present technology is a two-shot or multi-shot injection molding process wherein a first material is injected into a mold cavity to form a first portion of a molded part.
  • the first portion includes an interfacial surface and at least one interlock cavity formed adjacent to the interfacial surface.
  • a second material is injected into the mold cavity so that the second material contacts the interfacial surface and flows into the at least one interlock cavity. Solidification of the second material in the at least one interlock cavity formed in the first portion of the molded part creates a mechanical interlock between the first and second materials which prevents the two materials from being separated, and results in an injection molded part formed from dissimilar materials without the need for fasteners or adhesives.
  • a passive interlock is created wherein the at least one interlock cavity has an opening at the interfacial surface to allow the second material to flow into the interlock cavity.
  • an active interlock is created wherein the at least one interlock cavity is blocked by a thin wall formed from the first material, and fill pressure from the second material breaches the wall, thereby allowing the second material to flow into the at least one interlock cavity.
  • the mechanical interlock advantageously allows dissimilar materials to be used in forming an injection molded part thereby allowing the selection of materials based upon the functional properties or characteristics needed without regard to chemical similarity.
  • the mechanical interlock may be used to join similar materials where material adhesion does not provide enough strength.
  • similar materials may include polypropylene as the first material and a polypropylene impregnated with an electrically conductive compound (e.g., carbon black) as the second material.
  • FIG. A 1 is a perspective view of a two-shot injection molded part made by one embodiment of the process of the present technology.
  • FIG. A 3 is a detailed view of the mechanical interlock between the two materials forming the injection molded part shown in FIG. A 1 .
  • FIG. A 4 is a cutaway view of the first material forming a portion of the injection molded part and the interlock cavities for receiving the second material; the molding cavity is shown in section.
  • FIG. A 5 is a cutaway view of the second material filling a second mold and flowing into the interlock cavities formed by the first material.
  • FIG. A 6 is a detailed view of a partially filled interlock cavity shown in FIG. A 5 .
  • FIG. A 7 is a cutaway sectional view of the mold cavity for molding the first material.
  • FIG. B 1 is a perspective view of a second embodiment of a two-shot injection molded part made in accordance with the present technology.
  • FIG. B 2 is a cross-sectional view of the injection mold for the embodiment shown in FIG. B 1 , but showing the portion of the injection molded part and the interlock cavities formed by the first material.
  • FIG. B 3 is a cross-sectional view of the injection mold, illustrating the second material flowing into the interlock cavities formed by the first material.
  • FIG. B 4 is a detailed view of a partially filled interlock cavity shown in FIG. B 3 .
  • FIG. B 5 is a cross-sectional view of the injection molded part shown FIG. B 1 , illustrating the interlock cavities completely filled by the second material.
  • FIG. B 6 is a detailed view of a filled interlock cavity shown in FIG. B 5 .
  • FIG. C 1 is a perspective view of another embodiment of a two-shot injection molded part made in accordance with the present technology.
  • FIG. C 3 is a cross-sectional view taken along lines C 5 in FIG. C 1 , illustrating the second material flowing into the interlock cavities formed by the first material.
  • FIG. C 4 is a detailed view of a partially filled interlock cavity show in FIG. C 3 .
  • FIG. C 5 is a cross-sectional view taken along lines C 5 in FIG. C 1 , illustrating the interlock cavities completely filled by the second material.
  • FIG. C 6 is a detailed view of a filled interlock cavity shown in FIG. C 5 .
  • FIG. D 1 is a perspective view of a two-shot injection molded part made by an alternative embodiment of the process of the present technology.
  • FIG. D 3 is a detailed view of the mechanical interlock between the two materials forming the injection molded part shown in FIG. D 1 .
  • FIG. D 4 is a cutaway view of the first material forming a portion of the injection molded part shown in FIG. D 1 and the interlock cavities for receiving the second material, with the interlock cavities closed by walls formed from the first material; the mold cavity is shown in section.
  • FIG. D 5 is a cutaway view of the second material breaking the walls formed by the first material and flowing into the interlock cavities formed by the first material.
  • FIG. D 6 is a detailed view of a partially filled interlock cavity shown in FIG. D 5 .
  • FIG. E 1 is a top plan view of another embodiment of an injection molded part made by the process of the present technology.
  • FIG. E 2 is a side view of the injection molded part of FIG. E 1 .
  • the present technology describes methods for molding a molded part formed from at least two materials that exhibit different chemical and/or physical properties.
  • One of the materials is molded to form a first portion of the molded part which includes an interfacial surface and at least one interlock cavity adjacent to the interfacial surface.
  • the other material is molded to form the remainder of the molded part and flows into the interlock cavity created in the first portion of the molded part.
  • the second material solidifies within the interlock cavity, it creates a mechanical interlock at the interfacial surface that prevents the two materials from being separated.
  • the mechanical interlock is not dependent on adhesion between the materials.
  • a passive interlock is created at the interfacial surface by forming the interlock cavity so as to have an opening at the interfacial surface that allows the second material to flow into the interlock cavity.
  • an active interlock is created at the interfacial surface by forming the interlock cavity so that a thin wall of first material separates the interlock cavity from the mold section receiving the second material. Fill pressure from the second material shot is used to breach the thin wall, thereby allowing the second material to flow into the interlock cavity.
  • Each type of interlock can be created in different ways to form both butt joints and lap joints between dissimilar materials.
  • the formation of the interlock cavities in the first portion of the molded part followed by the molding and solidification of the second material within the interlock cavities has several advantages. No molding undercut is formed in forming the interlock cavities. In molding processes, the molding of undercuts often is considered undesirable because undercuts make the molded part more difficult to extract from the mold. Typically, the part must be molded from a flexible material in order to facilitate extraction of the part from the mold, which limits the choice of materials for the part, or the mold is complicated to design and manufacture, thereby increasing the cost of production of the part. In the present process, however, the interlock cavities are formed by pins that can easily be removed from the mold cavity, thereby simplifying the mold design.
  • the molding method described herein is particularly suitable for two-shot or multi-shot injection molding processes, the method can also be used in overmold processes.
  • Using an overmolding process a previously molded part is inserted into a mold and a second material is overmolded about the molded part.
  • the use of mechanical interlocks, especially with materials that do not adhere together, are useful in joining the overmolded component to the previously molded part.
  • the materials that can be used to form the injection molded part can be virtually any polymeric material that is capable of being injection molded. If the injection molded part is to be used in a package or container the polymer materials must also be compatible with the product to be stored in the container. Suitable polymeric materials include polyethylene (PE—high density, low density, LLD, VLLD), polypropylene (PP), polyvinyl chloride (PVC), high impact polystyrene (HIPS), cyclic olefin co-polymer (CoC) polyethylene vinyl acetate (EVA), polystyrene (PS), polycarbonate (PC), polyester terephthalate (PET), polyamide (nylon), acetal copolymer or homopolymer resin, and liquid crystal polymer.
  • PE polyethylene
  • PP polypropylene
  • PVC polyvinyl chloride
  • HIPS high impact polystyrene
  • COC cyclic olefin co-polymer
  • EVA polyethylene vinyl
  • dissimilar means materials with different physical and/or chemical properties. Dissimilar materials may be of a different grade of a thermoplastic resin where each grade has specific physical or chemical properties. For example, a co-polymer (e.g., ethylene vinyl acetate co-polymer) may have different properties based on the ratio (and arrangement) of the co-polymer components.
  • a co-polymer e.g., ethylene vinyl acetate co-polymer
  • one of the selected materials for forming a portion of the injection molded part can be an active polymer composition that absorbs or releases a gas.
  • the active polymer composition may incorporate a desiccant.
  • desiccants include, but are not limited to, silica gel, molecular sieve, calcium carbonate and naturally occurring clay compounds, including, but not limited to montmorillonite clay.
  • the desiccant composition includes one or more of the following desiccant plastic compositions comprising formulations that are used to mold shaped articles comprising 2-phase and 3-phase compositions.
  • a 2-phase composition is one that comprises a desiccant and a polymer.
  • a 3-phase composition is one that comprises a desiccant and at least 2 immiscible polymers.
  • the polymer is preferably selected from a group of thermoplastics that include polyolefins (for example: polyethylene (LDPE, LLDPE, HDPE and polypropylene) may be used.
  • Suitable 3-phase desiccant entrained plastic compositions include, but are not limited to, the desiccant plastics disclosed in one or more of the following U.S. Pat. Nos. 5,911,937, 6,214,255, 6,130,263, 6,080,350 and 6,174,952, 6,124,006, and 6,221,446. These references are incorporated herein by reference.
  • Particular combinations of dissimilar polymers that are envisaged for use in the present two-shot injection molding process include, but are not limited to, a nylon and a liquid crystal polymer material, a polystyrene and an acetal copolymer or homopolymer resin, and a desiccant entrained plastic and an acetal resin.
  • a part that needs to have anti-static properties in one area and high temperature resistance in another area could be molded from a nylon material for its anti-static properties and a liquid crystal polymer for its heat resistance properties.
  • a part that needs to have moisture resistance in one area and provide a bearing surface in another area could be molded from a desiccant entrained plastic for the portion that must have moisture resistance and from an acetal resin to form the bearing surface.
  • the exposed portion of the part can be composed of polycarbonate and the interior portion of the part could be composed of desiccant plastic.
  • the polycarbonate protects the desiccant plastic portion of the part from abrasion and/or dusting.
  • Other material combinations will occur to one of skill in the art.
  • FIGS. A 1 -A 7 A two-shot injection molded part 10 made according to one embodiment of the method of the present invention is illustrated in FIGS. A 1 -A 7 .
  • the injection molded part 10 is formed by injecting a first material, which can be, for example, a nylon, into a mold cavity 12 to form a first portion 20 of the injection molded part.
  • the mold cavity 12 includes a plurality of pins 16 placed adjacent to one wall of the mold cavity 12 , and intersecting what will become the interface between the first and second materials.
  • the first material is injected into the mold cavity 12 , it flows partially around the pins, resulting in a plurality of interlock cavities 24 in the first portion that each have an opening 26 at the interfacial surface 28 of the molded first portion.
  • a plurality of interlock cavities are illustrated in the first portion 20 , it will be appreciated that the number of interlock cavities could be one, two, or more cavities depending upon the size of the part, the size of the cavity, and the materials selected to form
  • the opening 26 to each interlock cavity has a size that is less than the diameter of the interlock cavity, alternatively less than half the diameter of the interlock cavity so that the opening is restricted or narrow.
  • This restricted opening is wide enough to allow the second material to flow into the interlock cavity, but narrow enough to act as a mechanical anchor that prevents the second material from being pulled apart from the first material after solidification, as explained further below.
  • the mold After molding the first material to form the first portion of the injection molded part, the mold is opened and rotated to a second mold cavity 14 , the mold is closed, and a second material, which can be, for example, a liquid crystal polymer material, is injected into the mold cavity 14 .
  • the second material contacts the interfacial surface 28 of the molded first portion and flows into the interlock cavities 24 formed in the first portion 20 , as shown in FIGS. A 5 and A 6 , forming a second portion 22 of the molded part.
  • a mechanical interlock 29 is then created between the first and second materials by the cooling and solidification of the second material in the interlock cavities formed in the first material, as shown in FIGS. A 1 and A 3 .
  • FIGS. B 1 -B 6 A two-shot injection molded part made according to another embodiment of the injection molding process of the present invention is illustrated in FIGS. B 1 -B 6 .
  • the B 1 -B 6 embodiment would be suitable for a part that needs to have moisture resistance in one area and provide a bearing surface in another area.
  • the injection molded part 30 has a first portion 32 , that is molded from a first material and that overlaps a second portion 34 .
  • the second portion 34 is molded from a second material that differs from the first material in at least one property.
  • the injection molded part 30 is formed by injection molding the first material in a mold cavity to form the first portion 32 of the injection molded part.
  • the mold cavity is provided with a plurality of generally frustaconically-shaped pins that project downwardly from the top of the mold cavity (as oriented in FIG. B 2 ).
  • the frustaconically-shaped pins have their base end at the top of the mold cavity, while the smaller diameter end intersects what will become the interface between the first and second materials.
  • the first material When the first material is injected into the mold cavity, it flows around the pins, resulting, upon solidification, in a plurality of interlock cavities 36 that extend completely through the molded first portion. Because of the shape of the pins, the resulting interlock cavities 36 have an opening 38 at the interfacial surface 35 of the molded first portion that is smaller than the opening 39 at the opposite end of the interlock cavity, as shown in FIG. B 2 .
  • the pins are removed.
  • the mold is opened and rotated to a second mold cavity 40 , the mold is closed, and the second material is injected into the second mold cavity.
  • the second material fills the second mold cavity, contacts the interfacial surface 35 and flows into the interlock cavities 36 formed in the first portion, as shown in FIGS. B 3 and B 4 .
  • Solidification of the second material in the interlock cavities formed in the first material creates a mechanical interlock 48 between the first and second materials, as illustrated in FIGS. B 5 and B 6 , by forming a neck portion of solidified second material that is more narrow than the diameter of the filled interlock cavity.
  • FIGS. C 1 -C 6 Another embodiment of a two-shot injection molded part made in accordance with the present process is illustrated in FIGS. C 1 -C 6 .
  • the two-shot injection molded part 50 has a first portion 52 , molded from a first material, and a second portion 54 molded from a second material that differs from the first material in at least one property.
  • the embodiment illustrated in FIGS. C 1 -C 6 is suitable for a molded part wherein the second portion is comprised of a desiccant entrained plastic and the first portion is comprised of a polycarbonate to provide protection for the desiccant plastic portion and protect it from abrasion and/or dusting.
  • the first portion 52 is bowl-shaped and has an inner sidewall 56 that forms an interfacial surface and an outer sidewall 58 .
  • the injection molded part 50 is formed by injection molding the first material in a mold cavity 60 to form the first portion of the injection molded part.
  • the mold cavity is provided with a plurality of pins that project inward from the wall of the mold cavity. Each pin has a larger diameter end that is adjacent to the mold cavity wall and a smaller diameter end that intersects what will become the interface between the first and second materials.
  • each interlock cavity 62 has an opening 64 at the interfacial surface that has a diameter that is smaller than the diameter of the opening at the outer sidewall 58 .
  • the mold is opened and rotated to a second mold cavity.
  • the mold is then closed and the second material is injected into the second mold cavity to form the second portion 54 of the molded part.
  • the second material fills the second mold cavity, contacts the interfacial surface, and flows into the interlock cavities 62 formed in the first portion 52 , as shown in FIGS. C 3 and C 4 .
  • Solidification of the second material in the interlock cavities formed in the first portion creates a mechanical interlock 68 between the first and second materials, as illustrated in FIGS. C 5 and C 6 .
  • FIGS. D 1 -D 6 A further embodiment of the injection molding process of the present invention, illustrating the use of an active interlock, is described with reference to FIGS. D 1 -D 6 .
  • the injection molded part 70 has a first portion 72 , formed from a first material, and a second portion 74 formed from a second material that differs from the first material in at least one property.
  • the molding of the first and second materials is similar to the process described in connection with FIGS. A 1 -A 7 , except that the pins are positioned in the mold cavity so that they are adjacent to but do not intersect what will become the interface between the first and second materials.
  • the wall has a thickness ranging from about 0.005 to about 0.010 inches (0.125 mm to 0.250 mm).
  • FIGS. E 1 and E 2 Another embodiment of an injection molded part made in accordance with the method of the present technology is shown in FIGS. E 1 and E 2 .
  • the molding process described in connection with FIGS. A 1 -A 7 is used to mold the part 90 .
  • a first portion 92 is molded from a first material, such as a polycarbonate, that can flex, as shown in FIG. E 2 , and has a memory that enables the first portion of the part to be. used as a type of spring.
  • a second portion 94 is molded from a second material, such as a desiccant entrained plastic.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
US12/160,153 2006-05-04 2007-05-04 Injection Molding Process for Molding Mechanical Interlocks Between Molded Components Abandoned US20090081407A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/160,153 US20090081407A1 (en) 2006-05-04 2007-05-04 Injection Molding Process for Molding Mechanical Interlocks Between Molded Components

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US74643806P 2006-05-04 2006-05-04
US12/160,153 US20090081407A1 (en) 2006-05-04 2007-05-04 Injection Molding Process for Molding Mechanical Interlocks Between Molded Components
PCT/US2007/010833 WO2007145732A2 (fr) 2006-05-04 2007-05-04 Procédé de moulage par injection de couplages mécaniques entre des éléments moulés

Related Parent Applications (1)

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PCT/US2007/010833 A-371-Of-International WO2007145732A2 (fr) 2006-05-04 2007-05-04 Procédé de moulage par injection de couplages mécaniques entre des éléments moulés

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US12/160,153 Abandoned US20090081407A1 (en) 2006-05-04 2007-05-04 Injection Molding Process for Molding Mechanical Interlocks Between Molded Components
US13/185,017 Active US8420197B2 (en) 2006-05-04 2011-07-18 Injection molding process for molding mechanical interlocks between molded components

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EP (1) EP2089206B1 (fr)
JP (1) JP2009535247A (fr)
CN (1) CN101479090B (fr)
CA (1) CA2636373C (fr)
WO (1) WO2007145732A2 (fr)

Cited By (16)

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US20110056906A1 (en) * 2009-09-07 2011-03-10 Grant Robert Meadows Bottle cap made from a material comprising polypropylene, particulate calcium carbonate and additives
US20110101007A1 (en) * 2008-05-16 2011-05-05 Sca Hygiene Products Ab Method of making a dispenser or a part thereof and a dispenser or part made by said method
US20110133517A1 (en) * 2009-12-06 2011-06-09 Honda Motor Co., Ltd., (a corporation of Japan) Overmolded joint for beam assembly
US20130113123A1 (en) * 2012-12-18 2013-05-09 Samsung Electronics Co., Ltd. Evaporative humidifier
US8485231B2 (en) 2011-07-11 2013-07-16 Tessy Plastics Corporation Method and apparatus for dispensing liquid medicine
US20150219047A1 (en) * 2014-01-03 2015-08-06 Shawn E. Peterson Filter cleaning assembly
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CN101479090A (zh) 2009-07-08
CA2636373A1 (fr) 2007-12-21
EP2089206A4 (fr) 2011-01-12
CN101479090B (zh) 2013-10-30
US8420197B2 (en) 2013-04-16
US20120009410A1 (en) 2012-01-12
CA2636373C (fr) 2016-11-22
WO2007145732A2 (fr) 2007-12-21
JP2009535247A (ja) 2009-10-01
EP2089206A2 (fr) 2009-08-19
EP2089206B1 (fr) 2020-07-08

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