Transparent PC Plastic One-Piece Table Mold — Product Introduction (Motek Furniture Mold Series)
Transparent PC Plastic One-Piece Table Mold — Product Introduction (Motek Furniture Mold Series)
Product Positioning
Motek introduces dedicated high-gloss injection molds for table products made with transparent PC (polycarbonate) one-piece injection molding. Transparent PC tables are known for their see-through aesthetic, high impact strength, and temperature resistance, commonly used in modern minimalist coffee tables, side tables, display stands, and commercial space furniture. Compared with standard opaque plastic table molds, the core challenges of transparent PC one-piece table molds lie in optical-grade surface quality, bubble and black-spot control specific to transparent parts, and internal stress and demolding protection under one-piece forming structures. Motek configures dedicated solutions around high-gloss cavity machining, raw material drying and injection process windows, and demolding mechanism design, helping customers achieve stable mass production of transparent PC one-piece tables.
Core Specifications
| Item | Specification |
|---|---|
| Applicable Plastics | PC (transparent grade, high-flow, low-internal-stress grades required) |
| Mold Material | S136 / 1.2316 corrosion-resistant mirror steel (cavity and core), H13 optional for slider inserts |
| Number of Cavities | Single cavity primarily (large one-piece part) |
| Mold Life | 300,000–500,000 shots (transparent parts are sensitive to cavity surface wear; periodic polishing maintenance required) |
| Cycle Time | 50–90 seconds (depending on tabletop size and wall thickness design) |
| Surface Treatment | Optical-grade mirror polishing (SPI A-1/A-2), with local high-gloss inserts where necessary |
| Demolding Method | Cavity insert with hydraulic cylinder opening + balanced ejector pin/ejector plate ejection |
| Runner System | Hot runner recommended (reduces cold slugs and flow marks) / Cold runner optional |
Product Features
Optical-Grade Cavity Surface Machining.
The clarity of transparent PC parts directly depends on cavity surface quality. Motek uses S136 or 1.2316 corrosion-resistant mirror steels, with cavity surfaces receiving optical-grade mirror polishing (SPI A-1/A-2) to eliminate machining marks and polishing traces, preventing light scattering that causes haziness. For large tabletops, polishing uniformity is particularly critical. Motek performs zoned polishing and inspection of cavity surfaces during machining to ensure consistent gloss across all areas.
Bubble and Black-Spot Control for Transparent Parts.
The most common defects in transparent PC injection molding are bubbles, silver streaks, and black spots. Motek coordinates with a hot runner system in mold design to reduce cold slugs entering the cavity. Runner and gate layouts are optimized through mold flow analysis to prevent melt stagnation and degradation that produce black spots; venting systems are properly arranged at cavity ends and weld line locations to prevent trapped gas from forming bubbles. Additionally, during the mold design phase, Motek clarifies PC raw material drying requirements with customers (typically requiring thorough drying above 120°C) to coordinate transparent defect control from the process source.
Internal Stress Control for One-Piece Forming Structures.
The legs and tabletop of transparent PC one-piece tables are formed in the same mold cavity, and thick-thin transition areas are prone to internal stress, causing stress marks or even cracking in finished products. Motek optimizes wall thickness transitions at leg roots and tabletop transition zones to avoid abrupt changes; cooling channels are zoned to equalize cooling rates between thick-wall and thin-wall areas, reducing residual stress. The ejection system uses a multi-point balanced layout to avoid ejection stress concentration.
Demolding Protection and Surface Scratch Prevention.
Transparent PC surfaces have relatively limited hardness and are easily scratched by mold walls or ejector pins during demolding. Motek provides ample draft angles in the demolding direction of cavities and cores, with ejector pin locations preferentially arranged in non-appearance areas (such as leg bottoms and tabletop undersides), and ejector pin heads polished. For undercut structures of one-piece tables, sliders or hydraulic cylinder inserts are used to separate first before ejection, preventing the product from being scratched during demolding.
Optical Defect Inspection and Process Window Confirmation.
During trial molding, Motek cooperates with customers on light transmission inspection of transparent parts, focusing on bubbles, flow marks, stress marks, and black spots, and adjusts gate positions, venting layouts, or cooling solutions based on inspection results. Before shipment, process window recommendations (melt temperature, mold temperature, holding pressure parameters) are provided to help customers shorten mass production debugging cycles.
Applications
Motek transparent PC plastic one-piece table molds are suitable for:
- Transparent PC one-piece injection molded coffee/side tables
- Modern minimalist transparent display stands
- Commercial space transparent leisure tables
- Transparent PC table products with one-piece legs
- Transparent table applications requiring high impact resistance and temperature resistance
Service Process
After the customer provides 3D product drawings, transparency grade, and appearance requirements, Motek completes mold flow analysis (including transparent part filling, venting, and internal stress evaluation) and mold structure confirmation; cavity steel is selected per optical-grade requirements, with surface samples provided for customer confirmation before polishing; during trial molding, Motek cooperates with the customer on light transmission inspection and process window debugging, providing samples for final sign-off. Before shipment, molds undergo anti-rust treatment and action testing, with water circuit diagrams, hot runner wiring diagrams, consumable parts lists, and transparent part injection process recommendations provided. Technical support is available during the warranty period, with lifetime maintenance consultation.
Motek — From opaque tables to optical-grade transparent PC one-piece tables, providing reliable mold solutions for injection molding of high-appearance plastic furniture.
