CA2445553A1 - Semi-molded thin wall container configuration and method - Google Patents
Semi-molded thin wall container configuration and method Download PDFInfo
- Publication number
- CA2445553A1 CA2445553A1 CA 2445553 CA2445553A CA2445553A1 CA 2445553 A1 CA2445553 A1 CA 2445553A1 CA 2445553 CA2445553 CA 2445553 CA 2445553 A CA2445553 A CA 2445553A CA 2445553 A1 CA2445553 A1 CA 2445553A1
- Authority
- CA
- Canada
- Prior art keywords
- skeletal structure
- container
- membrane
- base
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- 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
-
- 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
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/12—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor of articles having inserts or reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D11/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material
- B65D11/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material of curved cross-section
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/10—Forming by pressure difference, e.g. vacuum
-
- 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
-
- 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
- B29L2031/755—Membranes, diaphragms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
A container comprising an injection molded skeletal structure fusibly bonded to a membrane. The skeletal structure provides support for the container and the membrane extends across openings in the skeletal structure to define a continuous wall. A
method for producing a thin walled container is also provided. The method includes the steps of inserting a membrane capable of bonding with an injection molding resin into an injection mold and injecting the resin into the mold to form a skeletal structure on the membrane and define a container outlined and supported by the skeletal structure with the membrane extending across openings in the skeletal structure to define a continuous container wall.
method for producing a thin walled container is also provided. The method includes the steps of inserting a membrane capable of bonding with an injection molding resin into an injection mold and injecting the resin into the mold to form a skeletal structure on the membrane and define a container outlined and supported by the skeletal structure with the membrane extending across openings in the skeletal structure to define a continuous container wall.
Description
TITLE: SEMI-MOLDED THIN WALL CONTAINER CONFIGURATION
AND METHOD
FIELD OF THE INVENTION
This invention relates to the plastic container industry. More particularly, this invention relates to the use of injection molding in producing thin walled structures.
BACKGROUND OF THE INVENTION
Traditional ways of forming plastic containers include injection molding, blow molding and thermoforming. Very thin walled structures are typically produced by thermoforming.
Control over consistency of thickness using thermoforming however is inferior to injection molding techniques. Injection molding containers however are limited in their minimum thickness by such factors as resin viscosity and other processing parameters.
It is known to employ an in-mold labelling process in injection molding which involves the insertion of a label into a mold cavity followed by injection of plastic resin into the same cavity. The effect of this is to bond the label to the plastic part. This technology commonly uses a thin label in conjunction with a full thickness container design.
It is an object of this invention to achieve a thin walled container structure using an injection molding based process in order to better control part thickness.
SUMMARY OF THE INVENTION
A container comprising an injection molded skeletal structure fusibly bonded to a membrane. The skeletal structure provides support for the container and the membrane extends across openings in the skeletal structure to define a continuous wall.
A method for producing a thin walled container is provided. The method includes the steps of (i) inserting a membrane capable of bonding with an injection molding resin into an inj ection mold;
(ii) injecting the resin into said mold to form a skeletal structure on the membrane and define a container outlined and supported by the skeletal structure with the membrane extending across openings in the skeletal structure to define a continuous container wall.
DESCRIPTION OF DRAWINGS
Preferred embodiments of the invention are described below with reference to the accompanying illustrations in which:
Figure 1 is a perspective view of a container according to the present invention;
Figure 2 is a perspective view of an alternate embodiment container according to the present mvenhon;
Figure 3 is a view corresponding to Figure 1 but without a membrane to illustrate the skeletal structure;
Figure 4 is a perspective view illustrating a skeletal structure according to the present invention;
Figure 5 is a close-up view of Figure 4;
Figure 6 is a schematic representation of a mold assembly for manufacturing a container according to the present invention;
Figure 7 is a perspective view of a rectangular container according to the present invention;
Figure 8 is a top plan view corresponding to Figure 7;
Figure 9 is a top view of an octagonal container according to the present invention;
Figure 10 is a perspective view from below of the container of Figure 9;
AND METHOD
FIELD OF THE INVENTION
This invention relates to the plastic container industry. More particularly, this invention relates to the use of injection molding in producing thin walled structures.
BACKGROUND OF THE INVENTION
Traditional ways of forming plastic containers include injection molding, blow molding and thermoforming. Very thin walled structures are typically produced by thermoforming.
Control over consistency of thickness using thermoforming however is inferior to injection molding techniques. Injection molding containers however are limited in their minimum thickness by such factors as resin viscosity and other processing parameters.
It is known to employ an in-mold labelling process in injection molding which involves the insertion of a label into a mold cavity followed by injection of plastic resin into the same cavity. The effect of this is to bond the label to the plastic part. This technology commonly uses a thin label in conjunction with a full thickness container design.
It is an object of this invention to achieve a thin walled container structure using an injection molding based process in order to better control part thickness.
SUMMARY OF THE INVENTION
A container comprising an injection molded skeletal structure fusibly bonded to a membrane. The skeletal structure provides support for the container and the membrane extends across openings in the skeletal structure to define a continuous wall.
A method for producing a thin walled container is provided. The method includes the steps of (i) inserting a membrane capable of bonding with an injection molding resin into an inj ection mold;
(ii) injecting the resin into said mold to form a skeletal structure on the membrane and define a container outlined and supported by the skeletal structure with the membrane extending across openings in the skeletal structure to define a continuous container wall.
DESCRIPTION OF DRAWINGS
Preferred embodiments of the invention are described below with reference to the accompanying illustrations in which:
Figure 1 is a perspective view of a container according to the present invention;
Figure 2 is a perspective view of an alternate embodiment container according to the present mvenhon;
Figure 3 is a view corresponding to Figure 1 but without a membrane to illustrate the skeletal structure;
Figure 4 is a perspective view illustrating a skeletal structure according to the present invention;
Figure 5 is a close-up view of Figure 4;
Figure 6 is a schematic representation of a mold assembly for manufacturing a container according to the present invention;
Figure 7 is a perspective view of a rectangular container according to the present invention;
Figure 8 is a top plan view corresponding to Figure 7;
Figure 9 is a top view of an octagonal container according to the present invention;
Figure 10 is a perspective view from below of the container of Figure 9;
Figure 11 is a perspective view illustrating a container according to the present invention with a tamper evident feature;
Figure 12 is an end elevation of a core part of an injection molding machine for use in fornling a container according to the present invention;
Figure 13 is a sectional view through a cavity part of a mold for forming a container according to the present invention;
Figure 14 is a front elevation illustrating an injection molding apparatus having core and cavity parts corresponding to Figures 12 and 13;
Figure 1 S is an exploded view of a further embodiment of the present invention incorporating a wire frame in the container of the present invention;
Figure 16 is a section on line 17-17 of Figure 15; and Figure 17 is a section on line l 8-18 of Figure 15.
DESCRIPTION OF PREFERRED EMBODIMENTS
A container according to the present invention is generally identified by reference 10 in 1 ~ the accompanying illustrations. The container 10 has a skeletal structure generally identified by reference 20 in Figure 4 and having a base 22, a mouth opposite the base 22 defined by a rim 24, and ribs 26 extending longitudinally between the base 22 and the rim 24. As shown in the Figures 1 and 3 embodiment, diagonally extending ribs 28 may also be provided.
The balance of the container is a "film" or "membrane" 30 which may for example be the type of membrane conventionally used for in-mold labelling. The membrane 30 may be made of any material that will bond with a polymeric resin. Paper and polypropylene films have been tried successfully. Other suitable thin sheet materials will no doubt be apparent to those skilled in the art.
The skeletal structure 20 is molded onto the film or membrane 30 to create the container-like structure. The resulting container 10 can be used to hold both liquid and solid products depending on the membrane material selected. This unique combination provides a very thin container side wall and light weight beyond what thermoforming or injection molding can produce.
The skeletal structure 20 may include stacking ribs 40 which enable formed containers to rest one upon the other without becoming wedged together. The stacking ribs are projections which extend radially inwardly adjacent the base 22 of the skeletal structure 20. Other stacking rib 40 or stacking wing arrangements may be utilized such as along the base 22 or depending from the lip 24.
The Figure 1 and 3 embodiments have a similar skeletal structure 20. The Figure 2 embodiment has only vertically extending ribs 26 and a substantially thicker membrane 30.
In order to form such a container, the film or membrane 30 is inserted into the wall portion of a container-shaped injection molding apparatus 50 in Figure 5 having a core part 52 and a cavity part ~4. The "wall portion" is between the core 52 and the cavity 54. The mold is then closed and molten resin is injected to flow along suitably shaped passages 56 in the mold to define the skeletal structure 20. Generally the film will be adjacent the cavity part of the mold and the skeletal structure will be defined on the core part so as not to interfere with any patterning or labelling on the membrane. This however is not an absolute requirement from a structural standpoint and the opposite might be desirable for some applications.
Melt will generally be injected into the portion of the mold apparatus 50 defining the base 22 to flow radially outwardly and along the side ribs. While in many applications the base 22 will be defined entirely by resin, in some applications a skeletal base may also be provided having runners which extend from an injection molding gate to the ribs.
The container may be of any moldable shape such as rectangular or polygonal as long as the shape permits the molding of a skeletal outline. For example, Figures 7 and 8 illustrate a rectmgular container 10a and Figures 9 and 10 illustrate an octagonal container l Ob with respective skeletal structures 20a and 20b defining the edges and corners thereof.
The lip 22 may be configured to accept different styles of lid and may for example be provided with tamper evident features such as frangible membranes 60 illustrated in Figure 11.
Figure 12 is an end elevation of a core part of an injection molding machine for use in fornling a container according to the present invention;
Figure 13 is a sectional view through a cavity part of a mold for forming a container according to the present invention;
Figure 14 is a front elevation illustrating an injection molding apparatus having core and cavity parts corresponding to Figures 12 and 13;
Figure 1 S is an exploded view of a further embodiment of the present invention incorporating a wire frame in the container of the present invention;
Figure 16 is a section on line 17-17 of Figure 15; and Figure 17 is a section on line l 8-18 of Figure 15.
DESCRIPTION OF PREFERRED EMBODIMENTS
A container according to the present invention is generally identified by reference 10 in 1 ~ the accompanying illustrations. The container 10 has a skeletal structure generally identified by reference 20 in Figure 4 and having a base 22, a mouth opposite the base 22 defined by a rim 24, and ribs 26 extending longitudinally between the base 22 and the rim 24. As shown in the Figures 1 and 3 embodiment, diagonally extending ribs 28 may also be provided.
The balance of the container is a "film" or "membrane" 30 which may for example be the type of membrane conventionally used for in-mold labelling. The membrane 30 may be made of any material that will bond with a polymeric resin. Paper and polypropylene films have been tried successfully. Other suitable thin sheet materials will no doubt be apparent to those skilled in the art.
The skeletal structure 20 is molded onto the film or membrane 30 to create the container-like structure. The resulting container 10 can be used to hold both liquid and solid products depending on the membrane material selected. This unique combination provides a very thin container side wall and light weight beyond what thermoforming or injection molding can produce.
The skeletal structure 20 may include stacking ribs 40 which enable formed containers to rest one upon the other without becoming wedged together. The stacking ribs are projections which extend radially inwardly adjacent the base 22 of the skeletal structure 20. Other stacking rib 40 or stacking wing arrangements may be utilized such as along the base 22 or depending from the lip 24.
The Figure 1 and 3 embodiments have a similar skeletal structure 20. The Figure 2 embodiment has only vertically extending ribs 26 and a substantially thicker membrane 30.
In order to form such a container, the film or membrane 30 is inserted into the wall portion of a container-shaped injection molding apparatus 50 in Figure 5 having a core part 52 and a cavity part ~4. The "wall portion" is between the core 52 and the cavity 54. The mold is then closed and molten resin is injected to flow along suitably shaped passages 56 in the mold to define the skeletal structure 20. Generally the film will be adjacent the cavity part of the mold and the skeletal structure will be defined on the core part so as not to interfere with any patterning or labelling on the membrane. This however is not an absolute requirement from a structural standpoint and the opposite might be desirable for some applications.
Melt will generally be injected into the portion of the mold apparatus 50 defining the base 22 to flow radially outwardly and along the side ribs. While in many applications the base 22 will be defined entirely by resin, in some applications a skeletal base may also be provided having runners which extend from an injection molding gate to the ribs.
The container may be of any moldable shape such as rectangular or polygonal as long as the shape permits the molding of a skeletal outline. For example, Figures 7 and 8 illustrate a rectmgular container 10a and Figures 9 and 10 illustrate an octagonal container l Ob with respective skeletal structures 20a and 20b defining the edges and corners thereof.
The lip 22 may be configured to accept different styles of lid and may for example be provided with tamper evident features such as frangible membranes 60 illustrated in Figure 11.
Although it is preferred to mold the skeletal frame onto the membrane 30 for production efficiency, a similar structure might be obtained by forming the skeletal frame 20 and subsequently bonding the membrane 30 thereto with adhesives, ultrasonic welding or other bonding methods.
To further improve rigidity of the container 10, an insert molding technique may be used as illustrated in Figures 15, 16 and 17. According to the technique, a wire frame 70 is inserted into the mold cavity 54 along with the membrane 30 and the skeletal structures 20 is molded over the wire frame 70. In this manner the wire frame 70 sets to reinforce the skeletal structure 20. Rather than molding the skeletal structure 20 over the membrane 30, the opposite may also be carried out. For example, as illustrated in Figures 12, 13 and 14, two stage molding methods may be utilized by having a mold 50 with rotatable cores 52 having passages 56 for forming the skeletal structure 20. The cores 52 are substantially the same.
The mold 50 further has cavities 54a and ~4b. Cavity 54a is configured to register with either of the cores 52 for the forming of the skeletal structure 20. Cavity 54b is configured to register with either of the cavities 52 after forming of the skeletal structure 20 to form the membrane 30.
As illustrated the cores ~2 rotate 180° from forming the skeletal structure 20 for forming the membrane 30 after which the part is stripped. This is but one possibility.
More than two parts might be formed simultaneously. The cavities may be the same and passages 56 and the cores 52 may be different. It may be possible to have non-rotatable cores and rotatable cavities. Other variants may be apparent to those skilled in such structures.
Rather than forniing a skeletal structure 20 onto a thermoformed membrane, the opposite may also be feasible. Accordingly an injection molded skeletal structure 20 may be inserted into a vacuum forming apparatus and hot plastic membrane 30 may be formed over the skeletal structure 20. Depending on the temperatures involved, additional fusing agents or methods may be required to join the membrane 30 to the skeletal structure 20.
Although basket type patterns are illustrated for the skeletal frame 20, other configurations may be utilized, for example decorative configurations such as animal, fish, floral or other designs may be incorporated as long as the shapes are injection moldable and the resulting structure has adequate rigidity for its intended purposes.
The above description is intended in an illustrative rather than a restrictive sense.
Variations may be apparent to persons skilled in such structures without departing from the spirit and scope of the invention as defined by the claims set out below.
To further improve rigidity of the container 10, an insert molding technique may be used as illustrated in Figures 15, 16 and 17. According to the technique, a wire frame 70 is inserted into the mold cavity 54 along with the membrane 30 and the skeletal structures 20 is molded over the wire frame 70. In this manner the wire frame 70 sets to reinforce the skeletal structure 20. Rather than molding the skeletal structure 20 over the membrane 30, the opposite may also be carried out. For example, as illustrated in Figures 12, 13 and 14, two stage molding methods may be utilized by having a mold 50 with rotatable cores 52 having passages 56 for forming the skeletal structure 20. The cores 52 are substantially the same.
The mold 50 further has cavities 54a and ~4b. Cavity 54a is configured to register with either of the cores 52 for the forming of the skeletal structure 20. Cavity 54b is configured to register with either of the cavities 52 after forming of the skeletal structure 20 to form the membrane 30.
As illustrated the cores ~2 rotate 180° from forming the skeletal structure 20 for forming the membrane 30 after which the part is stripped. This is but one possibility.
More than two parts might be formed simultaneously. The cavities may be the same and passages 56 and the cores 52 may be different. It may be possible to have non-rotatable cores and rotatable cavities. Other variants may be apparent to those skilled in such structures.
Rather than forniing a skeletal structure 20 onto a thermoformed membrane, the opposite may also be feasible. Accordingly an injection molded skeletal structure 20 may be inserted into a vacuum forming apparatus and hot plastic membrane 30 may be formed over the skeletal structure 20. Depending on the temperatures involved, additional fusing agents or methods may be required to join the membrane 30 to the skeletal structure 20.
Although basket type patterns are illustrated for the skeletal frame 20, other configurations may be utilized, for example decorative configurations such as animal, fish, floral or other designs may be incorporated as long as the shapes are injection moldable and the resulting structure has adequate rigidity for its intended purposes.
The above description is intended in an illustrative rather than a restrictive sense.
Variations may be apparent to persons skilled in such structures without departing from the spirit and scope of the invention as defined by the claims set out below.
Claims (10)
1. A container comprising an injection molded skeletal structure fusibly bonded to a membrane, the skeletal structure providing support for the container and the membrane extending across openings defined by the skeletal structure to define a continuous wall.
2. The container of claim 1 wherein said skeletal structure has a basket-like configuration.
3. The container of claim 1 wherein said skeletal structure incorporates ornamental design fixtures.
4. The container of claims 1, 2 or 3 wherein said skeletal structure includes stacking ribs extending therefrom for maintaining a stack of said containers in a spaced apart arrangement to reduce frictional engagement therebetween and promote separation of one of said containers from said stack.
5. A method for producing a thin walled container comprising the steps of:
(i) inserting a membrane capable of bonding with an injection molding resin into an injection mold;
(ii) injecting said resin into said mold to form a skeletal structure on said membrane and define a container outlined and supported by the skeletal structure with the membrane extending across openings in the skeletal structure to define a continuous container wall.
(i) inserting a membrane capable of bonding with an injection molding resin into an injection mold;
(ii) injecting said resin into said mold to form a skeletal structure on said membrane and define a container outlined and supported by the skeletal structure with the membrane extending across openings in the skeletal structure to define a continuous container wall.
6. A method for producing a thin walled container comprising the steps of:
(i) obtaining an injection molded skeletal structure having a rim supported above a base by a plurality of ribs;
(ii) placing said skeletal structure in a vacuum forming machine;
(iii) forming a continuous membrane over said skeletal structure at a temperature sufficient to cover fusible bonding between said skeletal structure and said membrane to form a thin walled container supported by said skeletal structure.
(i) obtaining an injection molded skeletal structure having a rim supported above a base by a plurality of ribs;
(ii) placing said skeletal structure in a vacuum forming machine;
(iii) forming a continuous membrane over said skeletal structure at a temperature sufficient to cover fusible bonding between said skeletal structure and said membrane to form a thin walled container supported by said skeletal structure.
7. A method for producing a thin walled container comprising the steps of:
(i) forming a skeletal structure in a first injection molding operation, said skeletal structure having a base, a rim and ribs extending therebetween;
(ii) forming a thin membrane over said skeletal structure in a second injection molding operation, said thin membrane covering at least a sidewall portion of said skeletal structure extending between said base and said rim to bond to said ribs and in conjunction with said base and said ribs to form a base and sidewalls portion of said container.
(i) forming a skeletal structure in a first injection molding operation, said skeletal structure having a base, a rim and ribs extending therebetween;
(ii) forming a thin membrane over said skeletal structure in a second injection molding operation, said thin membrane covering at least a sidewall portion of said skeletal structure extending between said base and said rim to bond to said ribs and in conjunction with said base and said ribs to form a base and sidewalls portion of said container.
8. The method of claims 5, 6 and 7 wherein said membrane extends across said base to fluidly seal said base.
9. The container of claims 1, 2 or 3 further having a wire frame formed into said skeletal structure to reinforce said skeletal structure.
10. The method of claim 7 wherein said method is practised with a multi-stage mold having separate stages for steps (i) and (ii).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2445553 CA2445553A1 (en) | 2003-10-17 | 2003-10-17 | Semi-molded thin wall container configuration and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2445553 CA2445553A1 (en) | 2003-10-17 | 2003-10-17 | Semi-molded thin wall container configuration and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2445553A1 true CA2445553A1 (en) | 2004-03-10 |
Family
ID=32046605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2445553 Abandoned CA2445553A1 (en) | 2003-10-17 | 2003-10-17 | Semi-molded thin wall container configuration and method |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2445553A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1616801A3 (en) * | 2004-07-13 | 2006-03-29 | Daiwa Gravure Co., Ltd. | Cup shaped container |
| FR3091856A1 (en) * | 2019-01-22 | 2020-07-24 | Hebert P. | RIGID PACKAGING AND METHOD OF MANUFACTURING SUCH PACKAGING |
| GB2597341A (en) * | 2020-07-17 | 2022-01-26 | Innavisions Ltd | Improvements in or relating to moulded containers |
| CN114536744A (en) * | 2022-03-16 | 2022-05-27 | 裴峰 | Spatial framework composite material based on multi-material 3D printing technology |
-
2003
- 2003-10-17 CA CA 2445553 patent/CA2445553A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1616801A3 (en) * | 2004-07-13 | 2006-03-29 | Daiwa Gravure Co., Ltd. | Cup shaped container |
| FR3091856A1 (en) * | 2019-01-22 | 2020-07-24 | Hebert P. | RIGID PACKAGING AND METHOD OF MANUFACTURING SUCH PACKAGING |
| WO2020152411A1 (en) | 2019-01-22 | 2020-07-30 | Hebert P. | Rigid packaging and method for producing said packaging |
| GB2597341A (en) * | 2020-07-17 | 2022-01-26 | Innavisions Ltd | Improvements in or relating to moulded containers |
| GB2597341B (en) * | 2020-07-17 | 2023-01-18 | Innavisions Ltd | Improvements in or relating to thermoformed containers |
| CN114536744A (en) * | 2022-03-16 | 2022-05-27 | 裴峰 | Spatial framework composite material based on multi-material 3D printing technology |
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