EP2456605A2 - Method for manufacturing a multi-material product trough mould injection and its mould - Google Patents

Method for manufacturing a multi-material product trough mould injection and its mould

Info

Publication number
EP2456605A2
EP2456605A2 EP10747285A EP10747285A EP2456605A2 EP 2456605 A2 EP2456605 A2 EP 2456605A2 EP 10747285 A EP10747285 A EP 10747285A EP 10747285 A EP10747285 A EP 10747285A EP 2456605 A2 EP2456605 A2 EP 2456605A2
Authority
EP
European Patent Office
Prior art keywords
mould
materials
injection
manufacturing
material product
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.)
Withdrawn
Application number
EP10747285A
Other languages
German (de)
French (fr)
Inventor
Rui Pedro Soares Albergaria
Manuel Luís PEREIRA DE BASTOS
Artur Manuel Caminha De Barros E Castro
José Carlos DE PINHO BARBOSA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mda - Moldes De Azemeis Sa
Simoldes Plasticos Sa
Simoldes Plasticos SA
Original Assignee
Mda - Moldes De Azemeis Sa
Simoldes Plasticos Sa
Simoldes Plasticos SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mda - Moldes De Azemeis Sa, Simoldes Plasticos Sa, Simoldes Plasticos SA filed Critical Mda - Moldes De Azemeis Sa
Publication of EP2456605A2 publication Critical patent/EP2456605A2/en
Withdrawn legal-status Critical Current

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
    • 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
    • B29C45/1635—Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
    • 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
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3014—Door linings

Definitions

  • the present invention refers to a method for manufacturing a multi-material product, preferably a thermoplastic product by injection into a mould, the mould used in this manufacturing method, and the products obtained.
  • One object of the present invention is to provide a solution for manufacturing plastic parts presenting different colors and/or materials.
  • One object of the present invention is to provide a solution for manufacturing plastic parts presenting different colors and/or materials.
  • the injection mould is a tool built for the purpose of molding plastic parts.
  • one tongue or fixed half of the mould containing the injection system (at least one nozzle) and may have ejectors or lifters;
  • the moulds have different sizes, shapes, geometries and mechanisms design, according to the part or parts meant to be produced.
  • the mould is usually assembled in an injection machine, which injects the plastic into the mould; the plastic parts obtained from the injection are either directly sent to the end consumer, for instance, as plastic cups, containers or storage boxes, or are used in another type of industry that mixes multiple parts in order to obtain a final product.
  • An example is the automobile industry, aeronautics and naval applications which increasingly use plastic materials for vehicle construction.
  • the present invention describes a method for manufacturing a multi-material product by injection into a mould, the injected materials, the mould itself being able to perform the present methodology and the obtained plastic parts.
  • the objects of the present invention allow obtaining plastic parts in multiple materials, through two sequential injections steps in a single mould, mainly benefiting from the capacity of the injection machine so as to proceed with an intermediate stop, block and inject, using the plastic itself to seal the joining areas between zones with different colors.
  • multi- material includes the same material with different colors and / or matters of different nature which are compatible in terms of adhesion.
  • One achievement of the present invention is to disclose a method for manufacturing a multi-material product by injection into a mould comprising the following steps:
  • first materials (3,5) into a closed mould (1) into one or several first cavities; partially opening the mould, subsequent to first material (3,5) solidification, a simultaneous extraction occurring up to a preset value;
  • a further preferred embodiment comprises a method for manufacturing a multi-material product by injection into a mould wherein the mould opening can be equal to the thickness of the second material (9) in the final part, with a tolerance range from half up to two times of said thickness. More preferably the opening of the mould may vary from 0.5 up to 15 mm; more preferably the opening may vary from 1 to 7 mm; still more preferably the opening may vary from 1.5 to 4 mm; and even more preferably the opening of the mould may be of 2 mm the tolerances being as those usual in this technical field.
  • the method for manufacturing a multi-material product by injection into a mould as hereinabove described may inject materials of different colors.
  • the materials to be injected can be thermoplastic materials, such as polyamide, polycarbonate, Polyester, polyethylene, polypropylene, polyacrylonitrile, polystyrene, polyvinyl chloride, polyurethane, among others .
  • Another preferred goal is a mould for manufacturing a multi-material product, preferably of different colors, by injection techniques comprising: a. one or more first cavities to inject one or more first materials into the closed mould;
  • one or more second cavities to inject one or more second materials the cavities allowing the second materials to bind to the first materials, being sealed by the elements obtained by the injection of the first materials and by the sealing of the tongue half of the mould, preferably laterally, wherein in a more preferred embodiment the seal may additionally be performed by lifters and / or ejectors, existing in the tongue half of the mould.
  • the mould used to manufacture a multi-material product by injection as previously described may consist of a metal alloy, preferably aluminum or steel. Still in a more preferred embodiment it may include surface treatments.
  • Figure 1 Depicts the first step of the injection with the mould closed:
  • (1) represents the mould closed
  • (2) represents the injection nozzle which injects the first plastic material with color A
  • (4) represents the injection nozzle which injects the first plastic material with color B (5)
  • Figure 2 - Represents the second step of the injection, after solidification of the first plastic materials (3 and 5), wherein the mould opens simultaneously occurring the ejection (7), the plastic part remaining leaning on the cavity of the mould (6).
  • the injection nozzle (8) injects the second materials or binding materials (9 ), binding materials of color A to those of B.
  • the arrows represent the demolding direction.
  • Figure 3 Represents the ejection of the plastic part.
  • the mould opens completely and the multi-material plastic part (10) is ready for demolding.
  • Figure 4 Represents a detail of Figure 2, after solidification of the first plastic materials (3 and 5), second materials or binding materials (9), binding materials of colors A e B.
  • Figure 5 Represents the ejection kinematics of a plastic part .
  • One objective of the present invention is to provide a method for manufacturing a multi-material product by injection into a mould wherein:
  • the mould slightly opens and the ejection occurs simultaneously to the opening.
  • the second material or binding material is injected, thus connecting the areas of different color or materials.
  • This innovation is applicable to all kinds of multi- material parts and is especially advantageous for manufacturing plastic parts of medium and large size such as: door panels, dashboards, instrument panels, among others. These can be used in automotive, naval or aeronautic applications.

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)

Abstract

The present invention describes a method for manufacturing a multi-material product by injection into a mould, the injected materials, the mould itself able to perform the said method and the thus obtained plastic parts. injecting one or more first materials (3,5) into a closed mould into one or several first cavities; partially opening the mould, subsequent to first material (3,5) solidification, a simultaneous extraction occurring up to a preset value; injecting one or more second materials (9) into one or more second cavities, the said cavities allowing the second materials (9) to bind to the first materials (3,5). This method can be used for manufacturing plastic parts such as packaging or large parts for the automotive industry.

Description

DESCRIPTION
"METHOD FOR MANUFACTURING A MULTI-MATERIAL PRODUCT TROUGH
MOULD INJECTION AND ITS MOULD"
Technical Domain of the invention
The present invention refers to a method for manufacturing a multi-material product, preferably a thermoplastic product by injection into a mould, the mould used in this manufacturing method, and the products obtained.
Background of the Invention
One object of the present invention is to provide a solution for manufacturing plastic parts presenting different colors and/or materials.
The current state of the art is much more complex and uses rotational moulds, overmoulding tools with parts transfer so as to inject a different color, moulds with sealing mechanisms, using mechanical or hydraulically operated slides .
This methodology provides simpler injection moulds, with lower production times, lower maintenance costs and less error or malfunction susceptibility. General description of the invention
One object of the present invention is to provide a solution for manufacturing plastic parts presenting different colors and/or materials.
The injection mould is a tool built for the purpose of molding plastic parts.
It usually consists of special metal alloys, depending on the requirements, and consists of the following components:
one tongue or fixed half of the mould containing the injection system (at least one nozzle) and may have ejectors or lifters;
one moveable half containing the cavities.
The moulds have different sizes, shapes, geometries and mechanisms design, according to the part or parts meant to be produced. The mould is usually assembled in an injection machine, which injects the plastic into the mould; the plastic parts obtained from the injection are either directly sent to the end consumer, for instance, as plastic cups, containers or storage boxes, or are used in another type of industry that mixes multiple parts in order to obtain a final product. An example is the automobile industry, aeronautics and naval applications which increasingly use plastic materials for vehicle construction.
The present invention describes a method for manufacturing a multi-material product by injection into a mould, the injected materials, the mould itself being able to perform the present methodology and the obtained plastic parts. The objects of the present invention allow obtaining plastic parts in multiple materials, through two sequential injections steps in a single mould, mainly benefiting from the capacity of the injection machine so as to proceed with an intermediate stop, block and inject, using the plastic itself to seal the joining areas between zones with different colors.
In the context of the present document the term multi- material includes the same material with different colors and / or matters of different nature which are compatible in terms of adhesion.
One achievement of the present invention is to disclose a method for manufacturing a multi-material product by injection into a mould comprising the following steps:
injecting one or more first materials (3,5) into a closed mould (1) into one or several first cavities; partially opening the mould, subsequent to first material (3,5) solidification, a simultaneous extraction occurring up to a preset value;
injecting one or more second materials (9) into one or more second cavities, the cavities allowing the second materials (9) to bind to the first materials (3,5) .
A further preferred embodiment comprises a method for manufacturing a multi-material product by injection into a mould wherein the mould opening can be equal to the thickness of the second material (9) in the final part, with a tolerance range from half up to two times of said thickness. More preferably the opening of the mould may vary from 0.5 up to 15 mm; more preferably the opening may vary from 1 to 7 mm; still more preferably the opening may vary from 1.5 to 4 mm; and even more preferably the opening of the mould may be of 2 mm the tolerances being as those usual in this technical field.
In another preferred embodiment, the method for manufacturing a multi-material product by injection into a mould as hereinabove described may inject materials of different colors.
Still in a preferred embodiment the method for manufacturing a multi-material product by injection into a mould, the materials to be injected can be thermoplastic materials, such as polyamide, polycarbonate, Polyester, polyethylene, polypropylene, polyacrylonitrile, polystyrene, polyvinyl chloride, polyurethane, among others .
Another preferred goal is a mould for manufacturing a multi-material product, preferably of different colors, by injection techniques comprising: a. one or more first cavities to inject one or more first materials into the closed mould;
b. characteristics which, after solidification of the first materials, allow opening and ejecting partially, up to a predetermined value;
c. one or more second cavities to inject one or more second materials, the cavities allowing the second materials to bind to the first materials, being sealed by the elements obtained by the injection of the first materials and by the sealing of the tongue half of the mould, preferably laterally, wherein in a more preferred embodiment the seal may additionally be performed by lifters and / or ejectors, existing in the tongue half of the mould.
The mould used to manufacture a multi-material product by injection as previously described may consist of a metal alloy, preferably aluminum or steel. Still in a more preferred embodiment it may include surface treatments.
Description of the drawings
For an easier understanding of the invention, drawings have been herein attached, which depict preferred embodiments of the invention which, however, are not intended to limit the scope of the present invention.
Figure 1 — Depicts the first step of the injection with the mould closed:
(1) represents the mould closed, (2) represents the injection nozzle which injects the first plastic material with color A (3) and (4) represents the injection nozzle which injects the first plastic material with color B (5) . Figure 2 - Represents the second step of the injection, after solidification of the first plastic materials (3 and 5), wherein the mould opens simultaneously occurring the ejection (7), the plastic part remaining leaning on the cavity of the mould (6). The injection nozzle (8) injects the second materials or binding materials (9 ), binding materials of color A to those of B. The arrows represent the demolding direction.
Figure 3 - Represents the ejection of the plastic part. The mould opens completely and the multi-material plastic part (10) is ready for demolding. Figure 4 - Represents a detail of Figure 2, after solidification of the first plastic materials (3 and 5), second materials or binding materials (9), binding materials of colors A e B.
Figure 5 - Represents the ejection kinematics of a plastic part .
Example
For an clearer understanding of the invention, examples are provided, representing preferred embodiments of the invention which, however, are not intended to limit the scope of the present invention.
One objective of the present invention is to provide a method for manufacturing a multi-material product by injection into a mould wherein:
1st step: the several areas are injected with different colors/ materials;
2nd Step: the mould slightly opens and the ejection occurs simultaneously to the opening. In this intermediate stop, the second material or binding material is injected, thus connecting the areas of different color or materials.
This innovation is applicable to all kinds of multi- material parts and is especially advantageous for manufacturing plastic parts of medium and large size such as: door panels, dashboards, instrument panels, among others. These can be used in automotive, naval or aeronautic applications.
The following claims set out particular embodiments of the invention .

Claims

C L A I M S
1. Method for manufacturing a multi-material product by injection into a mould, comprising the following steps: injecting one or more first materials (3,5) into a closed mould (1) into one or several first cavities; partially opening the mould, subsequent to first material (3,5) solidification, a simultaneous extraction occurring up to a preset value;
injecting one or more second materials (9) into one or more second cavities, the cavities allowing the second materials (9) to bind to the first materials (3,5) .
2. Method for manufacturing a multi-material product by injection into a mould according to claim 1, wherein the mould opening is equal to the thickness of the final product of the second materials (9), having a tolerance ranging about half up to two times of said thickness .
3. Method for manufacturing a multi-material product by injection into a mould according to claim 2, wherein the said mould opening varies from 0,5 to 15 mm.
4. Method for manufacturing a multi-material product by injection into a mould according to claim 2 wherein the mould opening varies from 1 to 7 mm.
5. Method for manufacturing a multi-material product by injection into a mould according to claim 2 wherein the mould opening varies from 1,5 to 4 mm.
6. Method for manufacturing a multi-material product by injection into a mould according to claim 2 wherein the mould opening is of 2 mm.
7. Method for manufacturing a multi-material product by injection into a mould according to any of the previous claims wherein the materials have different colors.
8. Method for manufacturing a multi-material product by injection into a mould according to any of the previous claims wherein the injecting materials are thermoplastic .
9. Method for manufacturing a multi-material product by injection into a mould according to any of the previous claims wherein the thermoplastic material is polyamide, polycarbonate, Polyester, polyethylene, polypropylene, polyacrilonitrile, polystyrene, polyvinyl chloride and / or polyurethane .
10. Mould used for manufacturing a multi-material product by injection comprising:
a. one or more first cavities in a closed mould wherein one or more first materials (3,5) are injected;
b. features allowing the opening of the mould and partial extraction of the materials, up to a preset value, after solidification of the first materials (3,5);
c. one or more second cavities to inject one or more second materials (9), the said cavities allowing the second materials to bind to the first materials, being sealed by the elements obtained by the injection of the first materials and by the sealing of the tongue half (11) .
11. Mould used for manufacturing a multi-material product by injection according to claim 8 wherein the said sealing of the tongue half (11) is laterally carried out .
12. Mould used for manufacturing a multi-material product by injection according to claim 8 wherein the said sealing is further performed by lifters and/or extractors present in the tongue half (11).
13. Mould used for manufacturing a multi-material product by injection according to any of the previous claims wherein the mould is a metal alloy, preferably aluminum or steel.
14. Mould used for manufacturing a multi-material product by injection according to any of the previous claims further comprising a surface treatment.
15. Mould used for manufacturing a multi-material product by injection according to any of the previous claims wherein the first injected materials have different colors .
EP10747285A 2009-07-22 2010-07-22 Method for manufacturing a multi-material product trough mould injection and its mould Withdrawn EP2456605A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PT10468509A PT104685A (en) 2009-07-22 2009-07-22 METHOD FOR THE MANUFACTURE OF A MULTIMATERIAL PRODUCT THROUGH INJECTION IN A MOLD AND RESPECTIVE MOLD.
PCT/IB2010/053346 WO2011010295A2 (en) 2009-07-22 2010-07-22 Method for manufacturing a multi-material product trough mould injection and its mould

Publications (1)

Publication Number Publication Date
EP2456605A2 true EP2456605A2 (en) 2012-05-30

Family

ID=43499488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10747285A Withdrawn EP2456605A2 (en) 2009-07-22 2010-07-22 Method for manufacturing a multi-material product trough mould injection and its mould

Country Status (3)

Country Link
EP (1) EP2456605A2 (en)
PT (1) PT104685A (en)
WO (1) WO2011010295A2 (en)

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
US10667731B2 (en) 2017-04-20 2020-06-02 Gmeci, Llc Human performance oxygen sensor
US11109817B2 (en) 2017-04-20 2021-09-07 Gmeci, Llc Systems and methods for measuring physiological parameters

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
JPH01259920A (en) * 1988-04-12 1989-10-17 Sony Corp Molding die
JPH1034688A (en) * 1996-07-19 1998-02-10 Kasai Kogyo Co Ltd Molding device for laminated molding and molding process
JP3409645B2 (en) * 1997-05-26 2003-05-26 豊田合成株式会社 Two-color molding method
KR100969087B1 (en) * 2007-12-15 2010-07-09 기아자동차주식회사 Manufacturing apparatus and method of door trim for vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011010295A2 *

Also Published As

Publication number Publication date
PT104685A (en) 2011-01-24
WO2011010295A2 (en) 2011-01-27
WO2011010295A3 (en) 2011-05-05

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