Overmoulding by 3D printing
A technology of three-dimensional printing and thermoplastic materials, applied in the direction of 3D object support structure, processing and manufacturing, manufacturing tools, etc., can solve the problems of poor mechanical properties of thermoplastic parts, incompatibility with fuel, and manufacturing methods are not useful solutions, etc.
Active Publication Date: 2019-05-03
PLASTIC OMNIUM ADVANCED INNOVATION & RES SA
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Problems solved by technology
[0010] In addition to the above-mentioned production cycle time and post-processing issues, the mechanical properties (brittleness and hardness) of plastic parts obtained by successively depositing layers by 3D printing equipment are lower than those obtained by injection molding, blow molding, rotational molding, thermal Molding and other common industrial processes involving thermoplastic material molding or forming result in thermoplastic parts with poorer mechanical properties
Therefore, thermoplastic material components obtained entirely by deposition of thermoplastic material by 3D printing equipment do not meet the requirements for use in fuel systems and SCR systems
In other words, a manufacturing method based solely on 3D printing is not a useful solution
[0011] Also, most thermoplastic materials compatible with 3D printing are not compatible with fuel
Method used
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[0063] Polyoxymethylene (POM) is a semi-crystalline thermoplastic material known for its good fuel resistance. However, the shrinkage of this thermoplastic material makes it very difficult to use in 3D printing. Parts printed from POM are known to exhibit very high deformation. The internal stress in the printed part is very high, leading to delamination between the layers applied by the 3D printing device. It has been observed that, surprisingly, for components with dimensions below the critical value, the deformation due to shrinkage is very limited. The term "key figure" here refers to the volume of a cube whose sides have a length of 50 mm.
[0064] Polyoxymethylene (POM; (CH 2 O)n)) thermoplastic materials were tested.
[0065]
[0066]3D printing of vertical sheets made of POM was carried out on injection molded POM plates by means of a 3D printing device. Two types of plates (vertical rectangles) were printed. The first group is considered as a panel of group A...
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Abstract
Method for manufacturing a thermoplastic component for fuel systems or SCR systems comprising the following steps: 1. Molding and / or forming of a thermoplastic substrate from a first thermoplastic material, 2. Three-dimensional printing of a second thermoplastic material onto a first area of the thermoplastic substrate obtained after step 1, wherein the first thermoplastic material of the thermoplastic substrate and the second thermoplastic material have a chemical compatibility.
Description
technical field [0001] The present invention relates to thermoplastic components for use in vehicle fuel systems and selective catalytic reduction (SCR) systems. In particular, the present invention relates to methods of manufacturing that provide complex shapes formed of thermoplastic materials to form thermoplastic components specific to vehicle fuel systems and SCR systems. Background technique [0002] Most vehicles today include thermoplastic material components in their fuel systems and in their SCR systems, which allow exhaust gases to be purified with reducing agents. [0003] Typically, fuel and SCR systems include thermoplastic components such as valves, baffles or sensors. In particular, fuel systems or SCR systems may include thermoplastic components with complex geometries, such as anti-rollover valves, breather valves, brackets, filters, nipples, heating supports, electrical connections, or stored in the system. or any other component within the SCR system or...
Claims
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IPC IPC(8): B29C64/00B29C45/00B29K59/00B29L31/00B29L31/30F01N3/20B60K15/03B29K105/12
CPCB29K2059/00B29C45/0053F01N3/2066B60K2015/03032F01N2530/18F01N2610/02F01N2610/1406B29K2105/12B29C70/74F01N13/16B33Y80/00B33Y10/00B29C64/106B60K15/03B33Y70/00B29C64/118B29K2101/12F01N2610/01
Inventor 皮埃尔·德凯泽埃里克·德帕里
Owner PLASTIC OMNIUM ADVANCED INNOVATION & RES SA