| Customization: | Available |
|---|---|
| Warranty: | Online |
| Shaping Mode: | Plastic Injection Mould |
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China Haichen plastic tea cup injection machine mould
Raw material preparation Material selection:
The commonly used material is polypropylene (PP), which has the characteristics of high temperature resistance (can withstand more than 100 °C), good impact resistance, non-toxic and easy molding.
Other optional materials include polyethylene (PE), polystyrene (PS), etc., but PP has better comprehensive properties.
Drying treatment:
PP needs to be dried at 80~100°C for 2~4 hours to avoid bubbles or silver wires in the product.
Injection molding Feeding and plasticizing:
The plastic particles enter the injection molding machine through the hopper, melt in the heating cylinder at 170~260 °C, and the screw shear and mix to form a uniform melt.
Injection and pressure holding:
The melt is injected into the mold cavity at high pressure (850~1400 kg/cm²) at high speed, and the pressure is continuously applied to prevent shrinkage during the pressure holding stage.
Cooling and shaping:
The mold is cooled by circulating water (the temperature is usually controlled at 20~60°C) to ensure the rapid curing of the product.
Demoulding:
The hydraulic system drives the moving mold to separate from the fixed mold, and the ejector pushes out the finished teacup, and the cycle time is generally 8~15 seconds/piece.
Post-treatment to remove flashes:
trim the residue of the injection mold to ensure a smooth cup mouth.
Quality inspection:
check the dimensional accuracy (error ≤0.5%), wall thickness uniformity (generally 0.5~4mm) and surface finish.
Packing:
Qualified products are packed in dust-proof packaging to avoid scratches during transportation.
 |
name |
plastic cup mould |
| material | pp | |
|
cavity | 1 |
| function | hold the coffee |
Mold design points and teacup structure requirements
Parting surface design
The parting surface needs to avoid the main appearance surface of the cup, and is usually symmetrically divided along the height of the teacup to reduce the impact of the mold clamping line on the appearance.
For cup covers with threads, a side core-pulling mechanism (such as an inclined guide pillar or hydraulic slider) is required to ensure that there is no damage to the thread demoulding.
Optimization of gating system
The diameter of the sprue should be ≥4mm to avoid excessive flow resistance.
The cold material well is designed at the end of the runner with a depth of 1.5 times the diameter of the runner to prevent the cold material from entering the cavity.
Cooling & Exhaust System Cooling channels are distributed around the cavity with a spacing of ≤ 50 mm to ensure uniform heat dissipation and reduce warpage.
The depth of the exhaust groove ≤0.03mm (for PP material), which is set at the parting surface or the gap between the push rods to avoid lack of material caused by trapped air.
Demoulding structure
The demoulding slope is designed to be 1~2°, which is convenient for the smooth demoulding of the teacup.
The layout of the ejector rod needs to be symmetrical, and the ejection speed is controlled in two stages: low-speed start (to prevent deformation) → high-speed ejection (to improve efficiency).
We can according to your production details (sizes & weights, mold sizes if available) to recommend related machine to you if you need help.
We can produce kinds of moulds for customers as their special demand.Quotations will be based on drawings or samples provided by customers.Best quality and fit price, our products can be delivered on time
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