OMD

Out-Mold Decoration (OMD), also known as dry coating process or high-pressure transfer, and referred to in the industry as the Three Dimension Overlay Method (TOM), is a technology that embeds or attaches decorative elements directly onto plastic parts during the manufacturing process. This method is commonly used for surface decoration of plastic components, such as mobile phone casings, household appliance housings, and automotive interior parts.

Main features of OMD:

• High efficiency and consistency: The decoration process uses jigs and fixtures for precise positioning and fixing. The entire forming process takes place in a closed environment, reducing the impact of external conditions, minimizing manual operations, and improving production stability, consistency, and efficiency.
• Cost control: It reduces post-processing and decoration costs, thereby lowering overall production costs.
• Design flexibility: Complex designs and patterns can be achieved, expanding design options and creativity.

OMD technology not only enhances the appearance quality of products but also improves durability and added value.

In Out-Mold Decoration (OMD) technology, there are mainly two processes: OMR (Out-Mold Release) and OMF (Out-Mold Forming).

• OMR (Out-Mold Release) refers to out-mold transfer technology. It prints patterns onto a release transfer film, then uses vacuum and high pressure to transfer the decorative pattern onto the surface of the workpiece. The remaining film is released, followed by UV curing of the ink. This technology enables high-quality printing with excellent color vividness and fine details, providing outstanding decorative effects. OMR is suitable for mass production, reducing post-processing steps and effectively lowering overall production costs.
• OMF (Out-Mold Forming) refers to out-mold forming technology. It uses vacuum and high pressure to laminate a patterned film onto the surface of the workpiece for decoration. Subsequent die-cutting is required. The hardened transparent film remaining on the surface provides a wear-resistant decorative layer, effectively protecting the product from scratches and abrasion. OMF technology is also suitable for complex patterns and multi-layer decorative effects, meeting high requirements for aesthetics and durability.

Both technologies enable decoration during the product forming process, providing efficient and high-quality decorative solutions.

OMR (Out-Mold Release) is a surface decoration technology that achieves decoration by transferring decorative films or patterns onto the surface of plastic or other substrates.

• Preparation of decorative film: Select a high-performance transfer film (such as PET film) to ensure print quality and durability.
• Thermoforming: Place the film in a fixture and heat it, then use vacuum and pressure to transfer the texture or pattern onto the workpiece.
• Demolding and UV curing: Release the transfer film, leaving the pattern or texture on the product, followed by UV curing of the ink to complete the finished product.

OMR technology enables high-quality pattern printing and improves consistency of decorative effects, without the need for additional post-processing. This technology is widely used in applications such as electronic device housings, automotive interior parts, and home appliances that require aesthetically pleasing and durable surface decoration.

OMF (Out-Mold Forming) is a plastic molding technology similar to OMR (Out-Mold Release), with the main difference being the post-forming process. It is mainly used to form materials into parts with specific shapes and process them outside the mold. The main steps of OMF include:

• Fixture preparation: Before forming, design and manufacture suitable fixtures to ensure the final product's shape and dimensions (for prototyping, temporary support structures or simple fixtures may be used).
• Film heating: Place the decorative film with patterns into a fixture and heat it to a thermoplastic state.
• Forming process: Use vacuum forming to bond the adhesive layer of the decorative film tightly to the workpiece.
• Demolding and trimming: Remove the product from the mold and trim the edges to complete the finished product.

The main advantages of OMF include the ability to achieve three-dimensional effects, texture, gloss, and complex shapes in plastic parts, while improving production efficiency and reducing costs. This technology is commonly used in the production of large or complex plastic components and is widely applied in automotive, electronic devices, and other industrial products.

OMD (Out-Mold Decoration) technology is widely used in the following industries:

• Consumer electronics: Exterior decoration for products such as mobile phone cases, tablets, and other electronic device housings.
• Automotive industry: Interior and exterior decoration, including dashboards, center consoles, door panels, etc.
• Medical devices: Housings for diagnostic instruments and control panels for surgical equipment.
• Construction and interior design: Lighting fixtures, switch panels, etc.
• Home appliances: Appearance design for products such as refrigerators, washing machines, and control panels of household appliances.
• Industrial equipment: Exterior decoration for machinery, providing both aesthetics and enhanced durability.
• Sports equipment: Personalized decoration for fitness equipment and sports gear.

OMD technology provides high-quality surface decoration, enhancing both the market appeal and functionality of products.

The OMD (Out-Mold Decoration) process has several advantages:

• High-quality surface: OMD can achieve textured surfaces with excellent decorative effects, enhancing product aesthetics and tactile feel.
• Design flexibility: Enables complex patterns and colors to meet diverse design requirements.
• Durability: The decorative layer offers good wear resistance, scratch resistance, corrosion resistance, and weather resistance, improving product durability.
• Environmental friendliness: Compared with traditional painting, OMD is more environmentally friendly and can use eco-friendly materials, reducing environmental impact during production.
• Cost efficiency: Suitable for mass production, reducing per-unit production costs.
• Fast delivery: Fewer processes, higher yield, reduced labor, and faster production lead to quicker delivery.

OMF (Out-Mold Forming) is commonly used in the processing of plastics and composite materials. This process involves placing heated materials into fixtures to achieve the desired shape and properties. The equipment required for the OMF process includes:

• Fixture: The fixture is the core of Out-Mold Forming, usually made of high-temperature-resistant metal. It must be precisely designed to ensure that the product shape and dimensions meet requirements. Its durability and thermal conductivity affect forming efficiency and quality.
• Heating equipment: Heating equipment brings raw materials to a thermoplastic state. Common types include hot plates and heating chambers, ensuring uniform heating for proper forming.
• Vacuum system: The vacuum system is essential in Out-Mold Forming. It firmly secures the film to the fixture and removes air bubbles and wrinkles, improving product quality and reducing defect rates.
• High-pressure forming machine: This is the main equipment for OMF, applying pressure to the heated film to form it onto the workpiece.
• Cooling system: The cooling system helps rapidly cool the mold to solidify the product. Common methods include water cooling and air cooling, which shorten the forming cycle and improve product performance.
• Cutting equipment: Used after forming to remove excess material and trim edges. Common tools include laser cutters and mechanical cutting machines, ensuring product appearance and dimensional accuracy.
• Inspection equipment: Key for ensuring product quality, including calipers and thickness gauges to check dimensions, appearance, and physical properties, ensuring compliance with design specifications.

The selection and configuration of equipment in the Out-Mold Forming process directly affect production efficiency and final product quality.

• Adhesive layer: Located at the bottom, it provides easy installation and strong adhesion, ensuring the film is firmly attached to the substrate.
• ABS layer: Positioned above the adhesive layer, it enhances structural strength and impact resistance, protecting the inner layers.
• Bonding layer: Bonds the ABS layer and the printing layer securely, ensuring stable adhesion between layers.
• Printing layer: Contains printed patterns or logos, enhancing visual effects and brand recognition.
• Hardened transparent film (PMMA): The top layer provides transparency and scratch resistance, protecting inner layers and improving appearance.

The combination of these layers is designed to improve product performance and usability.

The thickness of OMF (Out-Mold Forming) film has multiple effects on the final product:

• Mechanical properties: Thicker films generally provide better strength and impact resistance, making the product more durable. In contrast, thinner films may be more prone to damage during vacuum forming.
• Flexibility: Film thickness affects flexibility; thinner films are usually more flexible and suitable for applications requiring bending or deformation.
• Transparency: Excessive thickness may reduce transparency. For transparent materials such as PMMA, thinner films maintain higher light transmittance.
• Thermal conductivity: Film thickness also affects heat transfer. Thinner films reach the required temperature more quickly, making them suitable for fast forming applications.
• Cost: Thicker film materials generally increase cost, so a balance between performance and cost is required in design.

The thickness of OMF film is typically between 0.2 and 0.3 mm. The actual selection depends on application function, decorative effect, and requirements for wear and scratch resistance. During the design stage, these factors must be considered to ensure the final product meets expected performance and quality.

To ensure the adhesion of OMF (Out-Mold Forming) process products, the following measures can be taken:

• Surface treatment: Properly treat the surfaces of the substrate and film (such as cleaning, roughening, or coating) to enhance surface activity and improve adhesion.
• Select appropriate adhesive: Choose suitable adhesives or bonding layers based on material properties to ensure strong adhesion and durability.
• Control forming temperature and pressure: Maintain appropriate temperature and pressure during the forming process to achieve effective bonding between materials.
• Optimize forming time: Proper forming time allows the adhesive layer to fully cure, improving adhesion.
• Use reinforcement layers: Add reinforcement layers (such as adhesive layers or specially treated materials) in the film structure to further enhance adhesion.
• Inspection and quality control: Regular adhesion testing ensures that products meet standards during production and allows timely adjustment of process parameters.

These measures can effectively improve the adhesion of Out-Mold Forming products, ensuring stability and durability during use, with final surface hardness reaching H~2H, further enhancing product performance.

When selecting suitable substrates for OMF (Out-Mold Forming) film production, the following factors should be considered:

• Material compatibility: Ensure chemical compatibility between the substrate and the film to avoid reactions or performance degradation. Common substrates include ABS, PC, and PMMA.
• Mechanical properties: Choose substrates with good strength and toughness to withstand pressure and temperature changes during processing.
• Surface treatment: The substrate surface should be properly treated to enhance adhesion and improve bonding with the film.
• Thermal stability: Consider the substrate’s thermal stability during processing to prevent deformation or degradation at high temperatures.
• Cost-effectiveness: Select economical substrates based on production needs and budget to ensure efficiency and profitability.
• Environmental impact: Consider environmentally friendly substrates, choosing recyclable or eco-friendly materials to meet sustainability requirements.

By considering all these factors, the most suitable substrate for OMF (Out-Mold Forming) film production can be selected.

Maintenance and cleaning of OMD (Out-Mold Decoration) products can follow these guidelines:

• Regular cleaning: Use a soft cloth and a mild cleaner to gently wipe the surface. Avoid using rough or abrasive materials.
• Avoid chemicals: Do not use cleaners containing strong acids, alkalis, or solvents to prevent surface damage.
• Moisture and heat protection: Avoid storing products in high-temperature or humid environments to prevent deformation or degradation.
• Regular inspection: Periodically check for wear or damage and perform repairs or replacements when necessary.
• Avoid strong impacts: Prevent severe collisions or heavy pressure during use to avoid structural damage.

Following these maintenance and cleaning recommendations can extend the lifespan of OMD products and maintain their performance.