In-mold coating process and ion beam irradiation analysis

Researchers have recently explored an in-mold coating process that allows injection molding and coating in the mold cavity.
first, the rubber particles are encumerated in polymethyl acrylates (PMMA) and injected into molding. It is then coated on the surface of the injected molded part and injected with a nitrogen ion beam
the
. The in-mold coating process is also digitally simulated. The effect of ion beam treatment is analyzed, and the fluidization and morphological characteristics of the sample are studied.
improve surface performance
the distribution of residual stress in the sample and calculate it numerically. The results show that the coating process and ionic beam irradiation have significantly improved the surface properties of injection molding parts, such as surface hardness and scratch resistance.
introduction
injection molding
is one of the most attractive manufacturing processes for mass production of complex polymer components with excellent dimensional tolerances in net shape.
It has many advantage
s, such





as low cost, good moldability and high integration capabilities. However, injection molding processes inherently lead to complex thermodynamic cycles in which polymers undergo significant changes in thermodynamic, fluid, thermal and mechanical characteristics. Therefore, finding out the fundamentals of the process is a challenging task . . .
3
,
. . .



. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . In this regard, further research has recently been made on the physics behind injection molding.
coating by covering the top of the substrate with additional material. This
process
the substrate
,
s9 s.
,
s.10 s.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . For example, the physical
surface properties
of the substrate, such as hardness, adhesion,

wetting, wear resistance and corrosion resistance, can be functionally designed. However, this coating requires the use of many toxic chemical solvents as base and surface coatings. In addition,
to create structured
through the coating process.
recently, an in-mold coating process has been introduced in an effort to advance the current coating process. In-mold coating process, injection molding sub-process consists of several stages: first, injection molding, and then slightly open the mold to form a small coating space. After that, the coated resin is injected into the room and cured under clamping force for extrusion. (
10
) That is, the surface of the injection mold is coated with the mold before release. During this process, the thickness and mechanical properties of the coating can be controlled in a more systematic manner. In addition, cumbersome and complex coating post-treatment procedures are not required, which can save manufacturing time
costs
.
transparent plastics, such as polymethyl acrylates (PMMA), butyl acetate cellulose,
polycarbonate (PC),
polyethylene glycol phenylphate
(PET), polypylene glycol (PBT),
polystyrene
(PS) and so on, have attracted great attention due to their widespread nature. Spectrum used in engineering applications. In particular, display applications require flexible polymer materials with high transparency (e.g., more than 90% transmission) and low fog to replace glass. However, the mechanical properties of a single polymer material are not superior to those of glass, especially surface properties such as hardness and wear resistance. As
result
13, additional coating
was
on the surface of the plastic material
. Traditional coating methods include spraying, immersion, crevices and swirling.
ion beam irradiation enhances the properties of the material
by injecting
such as protons, radon, nitrogen and metals. The
of the
,

,
the
microstructure of the target materials used in advanced materials science and engineering

,
,
, 18 ,

,
,

,
,
. Ion beam treatment on plastics is widely used due to its effectiveness, environmental friendliness and ease of access. Depending on the energy power, energy density and ion distribution, the ion beam deposits energy in the target material.
the study looked at in-mold coated polymer components irradiated with ion beams. First, we prepare the sample by injection molding, and then in-mold coating before the component is sprayed. The ion beam is then injected into the
hard coating of
. The entire in-mold process includes resin filling, packaging, curing and release, numerical simulation. Compare and analyze changes in the physical properties of the sample surface before and after exposure to the ion beam.
the study was published last week: Progress in Organics Coatings Volume 126, January 2019, Pages 28-34.