Production process of phone case

1、 General production process flow
.
Design phase
.
Requirement communication: Clarify the material, color, pattern, and functional requirements of the phone case (such as anti fingerprint, anti blue light, etc.).
Drawing design: Use professional software to draw 3D models, and consumers can preview and modify the design.
Mold making: High precision molds are processed using CNC machine tools, and mold testing is required to ensure stability.
.
Production preparation
.
Material selection: Match raw materials, colorants, and vulcanizing agents based on the material (such as TPU, PC, liquid silicone).
Raw material mixing: Mix the raw materials in proportion and stir evenly with a mixer.
.
Forming process
.
Injection molding (applicable to TPU, PC): Inject molten raw materials into the mold, control the temperature (TPU is 180-220 ℃) and pressure (80-120 MPa).
Sulfurization molding (liquid silicone): High temperature and high pressure (190 ℃) solidify the silicone, requiring a double slide machine to improve efficiency.
Post treatment: trimming, secondary sulfurization (silicone shell) or UV curing (spray coating process).

2、 Differences in materials and processes
Key parameter characteristics of material core process
TPU injection molding barrel temperature is 180-220 ℃, mold temperature is 30-60 ℃, high elasticity and transparency, but prone to yellowing
PC injection molding/electroplating processes require mirror polished molds, while electroplating requires specialized processes that are lightweight, impact resistant, but prone to scratches
Liquid silicone high-temperature vulcanization molding with a vulcanization temperature of 190 ℃, precise core design and delicate hand feel, environmentally friendly but high cost

3、 Production equipment and tools
.
Main equipment
.
Injection molding machine: used for TPU/PC shell production (such as the Haitian 130 high-speed injection molding machine).
Vulcanization machine: Liquid silicone shell forming (vertical double slide machine).
UV printer: Personalized pattern printing (such as 3050UV flatbed printer).
.
Auxiliary tools
.
Mold: requires mirror polishing, with exhaust hole diameter ≤ 0.1mm.
Measurement equipment: Ensure dimensional accuracy (such as CNC machining centers).

4、 Precautions
Quality control: TPU needs to avoid high-temperature degradation, and silicone needs to control the vulcanization time.
Cost factor: Composite materials (such as TPU+PC) balance performance and price, while Kevlar materials have higher costs.
For further understanding of specific materials or equipment details, please refer to relevant technical documents or video resources.