CA2162533A1 - Method of providing an inscription or logo on articles of synthetic material - Google Patents
Method of providing an inscription or logo on articles of synthetic materialInfo
- Publication number
- CA2162533A1 CA2162533A1 CA 2162533 CA2162533A CA2162533A1 CA 2162533 A1 CA2162533 A1 CA 2162533A1 CA 2162533 CA2162533 CA 2162533 CA 2162533 A CA2162533 A CA 2162533A CA 2162533 A1 CA2162533 A1 CA 2162533A1
- Authority
- CA
- Canada
- Prior art keywords
- inscription
- logo
- synthetic material
- carrier foil
- 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
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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
-
- 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
- B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
- B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
- B29C37/0032—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied upon the mould surface before introducing the moulding compound, e.g. applying a gelcoat
-
- 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
- B29C45/14827—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 using a transfer foil detachable from the insert
-
- 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
- B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
- B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
- B29C2037/0042—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied in solid sheet form, e.g. as meltable sheet
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
A method of providing an inscription or logo, with or out of a lacquer, on articles of synthetic material, particularly articles manufactured by a foaming process in a mold which is composed of two mold halves and whose interior has been sprayed with a parting agent, wherein the outer layer of the articles is composed of a polyurethane material. A carrier foil forming the visible side of a label is provided with an inscription or a logo of lacquer.
Prior to the molding procedure, the carrier foil is placed with its side opposite the inscription or logo against the surface of at least one of the mold halves. After the molding procedure, the carrier foil is pulled off from the article of synthetic material.
Prior to the molding procedure, the carrier foil is placed with its side opposite the inscription or logo against the surface of at least one of the mold halves. After the molding procedure, the carrier foil is pulled off from the article of synthetic material.
Description
RACR~,~OUND OF THE lNV~ ~lON
1. Field of the Invention The present invention relates to a method of providing an inscription or logo, with or out of a lacquer, on articles of synthetic material, particularly articles manufactured by a foaming process in a mold which is composed of two mold halves and whose interior has been sprayed with a parting agent, wherein the outer layer of the articles is composed of a polyurethane material.
1. Field of the Invention The present invention relates to a method of providing an inscription or logo, with or out of a lacquer, on articles of synthetic material, particularly articles manufactured by a foaming process in a mold which is composed of two mold halves and whose interior has been sprayed with a parting agent, wherein the outer layer of the articles is composed of a polyurethane material.
2. Description of the Related Art The manufacture of hollow bodies, for example, barrels or other containers for liquids, which have an inner high-grade steel bubble and an outer casing of polyurethane, is known in the art.
In order to provide such articles of synthetic material with an inscription, such as, directions for use, description of contents, references to intellectual property rights, trademarks, etc., or with a logo of any type, the inner surfaces of the two mold halves of the open foaming mold are sprayed, prior to the foaming process, with a parting agent which ensures that the finished article can be removed from the mold. Subsequently, at least one stencil containing the logo or the inscription is placed in the mold halves and the ink is sprayed onto the area of the inner wall of the mold which is covered by the stencil. If multiple colors are desired, a separate stencil is required for each color, wherein the stencils are placed on top of each other. Because this procedure is very cumbersome, the multiple colors are restricted to two colors.
After the at least one stencil has been removed from the foaming mold, for example, a bubble of high-grade steel, is fixed and clamped in the mold, and the mold which is still open until this time can be closed. The components of the polyurethane foam, i.e., polyol and isocyanate, can then be introduced into the closed mold and the components react with each other over a period of a few minutes. At the end of the foaming process, the finished article can be removed from the mold after opening the mold. The ink which had previously been sprayed onto the interior wall of the mold now adheres to the polyurethane casing of the finished article.
Aside from the fact that the application of multicolor inscriptions or logos is very cumbersome, this type of applying the inscriptions or logos has the disadvantage that shadings cannot be avoided and, moreover, the lines formed by the inscription or the logo in the stencil are visible.
It is also known in the art to manufacture single-layer or multiple-layer articles of synthetic material by injection molding.
For example, DE 23 42 794 C3 discloses multiple-layer molded articles of thermoplastic material which have a foamed core and an outer skin which is not foamed. In that case, initially a portion of the non-foamed synthetic material and subsequently a synthetic material containing a propellant are simultaneously injected with an additional non-foamed synthetic material through a central nozzle and an annular nozzle surrounding the central nozzle into a mold or a two-part molding tool, wherein the non-foamed synthetic material is injected through the central nozzle and the synthetic material containing the propellant is injected through the annular nozzle.
As compared to molded articles of compact synthetic material, molded articles of synthetic material containing a propellant have the advantage that they can be manufactured independently of the wall thickness, on the one hand, and that they are substantially lighter, on the other hand, which results in a material saving without negatively effecting the strength. A separate work step is required for applying inscriptions or decorative effects of a lacquer on these injection-molded articles of synthetic material.
For placing a printed label or material blank, for example, a label, onto at least the side walls of a container of synthetic material manufactured in accordance with a deep-drawing process in a thermoforming machine, it has become known from DE 41 24 994 A1 to place a label of a synthetic material into the mold, wherein the label covers at least the side walls of the container of synthetic material and the label is intimately connected to the outer side of the container. The synthetic material required for forming the container is used in the form of a foil; the foil is pulled from a roll and is supplied to a preheating station. Subsequently, the foil of synthetic material enters the actual deep-drawing unit.
The deep-drawing unit has several deep-drawing troughs into which the labels or material blanks are placed by means of an insertion device prior to the deep-drawing step of the foil of synthetic material. The insertion device consists essentially of a turnstile and several arms extending in a vertical plane, wherein the turnstile is arranged so as to be displacable in longitudinal direction. Several such arms are arranged in transverse direction of the turnstile in accordance with the number of molding nests of the tool of the thermoforming machine. A transverse support member having one or two vertically adjustable suction members cooperates with the turnstile, wherein the suction members remove the labels from two parallel magazines which are arranged one above the other and transfer the labels to the arms of the turnstile.
SUMMARY OF THE lNv~ lON
Therefore, it is the primary object of the present invention to provide a method of the above-described type, particularly for applying an inscription or a logo on the polyurethane casing of an article of synthetic material manufactured by a foaming process, in which the above-mentioned disadvantages are avoided and separate steps of operation during the manufacture of the articles are unnecessary.
In accordance with the present invention, a carrier foil forming the visible side of a label is provided with an inscription or a logo of lacquer. Prior to the molding procedure, the carrier foil is placed with its side opposite the inscription or logo against the surface of at least one of the mold halves. After the molding procedure, the carrier foil is pulled off from the article of synthetic material.
DETATT-~n DESCRIPTION OF THE lNV~. l-lON
Thus, in accordance with the present invention, it is merely necessary to place and fix in the mold half or mold halves the carrier foil which previously has been provided with the inscription or the logo, preferably by means of a screen printing method, in order to ensure that in mass production the inscription or the logo always appear at the same location in the finished articles of synthetic material. In addition, a fixing agent can be printed onto the side of the carrier foil opposite the inscription or logo.
The present invention is based on the finding, obtained through many experiments, that a residue-free removal of the carrier foil with the fixing agent is primarily possible if the article of synthetic material, or at least the outer layer of the article in the case of a multiple-layer article, is composed of a material whose adhesive force is greater than that of the carrier foil. This is particularly the case in articles which are composed of a polyurethane material or have a casing of a polyurethane material. The carrier foil or the label can be placed into the mold either manually, or by means of suction members or an electrostatic device.
An advantageous embodiment of the present invention provides that the lacquer is printed onto a carrier foil composed of polypropelene. It has been found that a carrier foil of polypropelene produces the best results with respect to electrostatic behavior which, together with the adhesion, is a decisive factor for the secure adhesion of the label in the mold.
The transfer of the inscription or logo onto the article of synthetic material during the foaming or injection procedure does not require an adhesive because the lacquer imprint adheres permanently to the outer surface of the article of synthetic material after the foaming or injection procedure. Accordingly, it is not required to glue or intimately connect labels to the article of synthetic material in order to provide the desired inscriptions on the finished article. Moreover, it does not pose a problem to apply multiple-color inscriptions or logos because the lacquer is ini~ially applied onto the carrier foil by a screen printing method. It is easily possible in this manner to achieve four-color printing quality.
While specific embodiments of the invention have been shown and described in detail to illustrate the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
In order to provide such articles of synthetic material with an inscription, such as, directions for use, description of contents, references to intellectual property rights, trademarks, etc., or with a logo of any type, the inner surfaces of the two mold halves of the open foaming mold are sprayed, prior to the foaming process, with a parting agent which ensures that the finished article can be removed from the mold. Subsequently, at least one stencil containing the logo or the inscription is placed in the mold halves and the ink is sprayed onto the area of the inner wall of the mold which is covered by the stencil. If multiple colors are desired, a separate stencil is required for each color, wherein the stencils are placed on top of each other. Because this procedure is very cumbersome, the multiple colors are restricted to two colors.
After the at least one stencil has been removed from the foaming mold, for example, a bubble of high-grade steel, is fixed and clamped in the mold, and the mold which is still open until this time can be closed. The components of the polyurethane foam, i.e., polyol and isocyanate, can then be introduced into the closed mold and the components react with each other over a period of a few minutes. At the end of the foaming process, the finished article can be removed from the mold after opening the mold. The ink which had previously been sprayed onto the interior wall of the mold now adheres to the polyurethane casing of the finished article.
Aside from the fact that the application of multicolor inscriptions or logos is very cumbersome, this type of applying the inscriptions or logos has the disadvantage that shadings cannot be avoided and, moreover, the lines formed by the inscription or the logo in the stencil are visible.
It is also known in the art to manufacture single-layer or multiple-layer articles of synthetic material by injection molding.
For example, DE 23 42 794 C3 discloses multiple-layer molded articles of thermoplastic material which have a foamed core and an outer skin which is not foamed. In that case, initially a portion of the non-foamed synthetic material and subsequently a synthetic material containing a propellant are simultaneously injected with an additional non-foamed synthetic material through a central nozzle and an annular nozzle surrounding the central nozzle into a mold or a two-part molding tool, wherein the non-foamed synthetic material is injected through the central nozzle and the synthetic material containing the propellant is injected through the annular nozzle.
As compared to molded articles of compact synthetic material, molded articles of synthetic material containing a propellant have the advantage that they can be manufactured independently of the wall thickness, on the one hand, and that they are substantially lighter, on the other hand, which results in a material saving without negatively effecting the strength. A separate work step is required for applying inscriptions or decorative effects of a lacquer on these injection-molded articles of synthetic material.
For placing a printed label or material blank, for example, a label, onto at least the side walls of a container of synthetic material manufactured in accordance with a deep-drawing process in a thermoforming machine, it has become known from DE 41 24 994 A1 to place a label of a synthetic material into the mold, wherein the label covers at least the side walls of the container of synthetic material and the label is intimately connected to the outer side of the container. The synthetic material required for forming the container is used in the form of a foil; the foil is pulled from a roll and is supplied to a preheating station. Subsequently, the foil of synthetic material enters the actual deep-drawing unit.
The deep-drawing unit has several deep-drawing troughs into which the labels or material blanks are placed by means of an insertion device prior to the deep-drawing step of the foil of synthetic material. The insertion device consists essentially of a turnstile and several arms extending in a vertical plane, wherein the turnstile is arranged so as to be displacable in longitudinal direction. Several such arms are arranged in transverse direction of the turnstile in accordance with the number of molding nests of the tool of the thermoforming machine. A transverse support member having one or two vertically adjustable suction members cooperates with the turnstile, wherein the suction members remove the labels from two parallel magazines which are arranged one above the other and transfer the labels to the arms of the turnstile.
SUMMARY OF THE lNv~ lON
Therefore, it is the primary object of the present invention to provide a method of the above-described type, particularly for applying an inscription or a logo on the polyurethane casing of an article of synthetic material manufactured by a foaming process, in which the above-mentioned disadvantages are avoided and separate steps of operation during the manufacture of the articles are unnecessary.
In accordance with the present invention, a carrier foil forming the visible side of a label is provided with an inscription or a logo of lacquer. Prior to the molding procedure, the carrier foil is placed with its side opposite the inscription or logo against the surface of at least one of the mold halves. After the molding procedure, the carrier foil is pulled off from the article of synthetic material.
DETATT-~n DESCRIPTION OF THE lNV~. l-lON
Thus, in accordance with the present invention, it is merely necessary to place and fix in the mold half or mold halves the carrier foil which previously has been provided with the inscription or the logo, preferably by means of a screen printing method, in order to ensure that in mass production the inscription or the logo always appear at the same location in the finished articles of synthetic material. In addition, a fixing agent can be printed onto the side of the carrier foil opposite the inscription or logo.
The present invention is based on the finding, obtained through many experiments, that a residue-free removal of the carrier foil with the fixing agent is primarily possible if the article of synthetic material, or at least the outer layer of the article in the case of a multiple-layer article, is composed of a material whose adhesive force is greater than that of the carrier foil. This is particularly the case in articles which are composed of a polyurethane material or have a casing of a polyurethane material. The carrier foil or the label can be placed into the mold either manually, or by means of suction members or an electrostatic device.
An advantageous embodiment of the present invention provides that the lacquer is printed onto a carrier foil composed of polypropelene. It has been found that a carrier foil of polypropelene produces the best results with respect to electrostatic behavior which, together with the adhesion, is a decisive factor for the secure adhesion of the label in the mold.
The transfer of the inscription or logo onto the article of synthetic material during the foaming or injection procedure does not require an adhesive because the lacquer imprint adheres permanently to the outer surface of the article of synthetic material after the foaming or injection procedure. Accordingly, it is not required to glue or intimately connect labels to the article of synthetic material in order to provide the desired inscriptions on the finished article. Moreover, it does not pose a problem to apply multiple-color inscriptions or logos because the lacquer is ini~ially applied onto the carrier foil by a screen printing method. It is easily possible in this manner to achieve four-color printing quality.
While specific embodiments of the invention have been shown and described in detail to illustrate the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
Claims (5)
1. A method of providing an inscription or logo on an article of synthetic material manufactured by a molding process in a mold having two mold halves and an interior which has been coated with a panting agent, the article having an outer layer of a polyurethane material, the method comprising providing a carrier foil forming a visible side of a label with an inscription or a logo of lacquer, subsequently, prior to the molding process, placing the carrier foil with a side opposite the inscription or logo against an inner surface of at least one of the mold halves and, after the molding process, removing the carrier foil from the article of synthetic material.
2. The method according to claim 1, comprising printing the inscription or logo onto the carrier foil.
3. The method according to claim 2, wherein the carrier foil is a polypropylene foil.
4. The method according to claim 1, comprising improving adherence of the label to the at least one mold half by an electrostatic charge.
5. The method according to any one of claims 1 to 4 wherein said article of synthetic material is a foamed article.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4440033 | 1994-11-10 | ||
| DEP4440033.0 | 1994-11-10 | ||
| DE19504274A DE19504274A1 (en) | 1994-11-10 | 1995-02-09 | Process for labeling or applying a logo on plastic articles |
| DE19504274.3 | 1995-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2162533A1 true CA2162533A1 (en) | 1996-05-11 |
Family
ID=25941842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2162533 Abandoned CA2162533A1 (en) | 1994-11-10 | 1995-11-09 | Method of providing an inscription or logo on articles of synthetic material |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0711645A1 (en) |
| JP (1) | JPH08206589A (en) |
| CA (1) | CA2162533A1 (en) |
| CZ (1) | CZ297095A3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341947A (en) * | 2013-07-09 | 2013-10-09 | 浙江兆奕科技有限公司 | Special film product-based external Logo treating process |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2830483B1 (en) * | 2001-10-05 | 2004-11-26 | Knauf Snc | METHOD FOR MARKING A PART OF PLASTIC MATERIAL AND PART OBTAINED |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62184824A (en) * | 1986-02-10 | 1987-08-13 | Matsui Shikiso Kagaku Kogyosho:Kk | Manufacture of plastic molded body with thermally reversibly color-changeable pattern |
| DE3917156A1 (en) * | 1989-04-16 | 1990-10-18 | Manfred Grueninger | Image motor transfer - using laser copier and fixing oil |
| BE1005449A3 (en) * | 1991-10-04 | 1993-07-27 | Comet N V | Method for printing a mark or a symbol on an object and bearing device forthis |
-
1995
- 1995-11-06 EP EP95117417A patent/EP0711645A1/en not_active Withdrawn
- 1995-11-08 JP JP29001895A patent/JPH08206589A/en active Pending
- 1995-11-09 CA CA 2162533 patent/CA2162533A1/en not_active Abandoned
- 1995-11-10 CZ CZ952970A patent/CZ297095A3/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341947A (en) * | 2013-07-09 | 2013-10-09 | 浙江兆奕科技有限公司 | Special film product-based external Logo treating process |
Also Published As
| Publication number | Publication date |
|---|---|
| CZ297095A3 (en) | 1996-06-12 |
| JPH08206589A (en) | 1996-08-13 |
| EP0711645A1 (en) | 1996-05-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |