Plastic Melting Temperature and Injection Molding Temperature Chart
The intricacies of mold temperature in the injection molding process are pivotal to achieving precision and quality in the final product. A fundamental aspect of this process is the melting temperature of plastic resin, which must be carefully managed to ensure optimal flow and filling of the mold.
Plastic resin's melting temperature is a critical parameter that dictates the ease with which it can be injected into a mold. This temperature varies depending on the type of resin used and is essential for determining the appropriate processing conditions for each material.
Table of Plastic Material Melting Point, Injection Molding Temperature, Baking Temperature and Drying Hours
Plastics Short Name | Plastic Melting Temperature Range(℃) | Plastic Mold Temperature(℃) | Material Drying Temperature(℃) | Plastic Drying Hour (h) |
ABS | 180-250 | 50-90 | 80-90 | 2~3 |
PP | 190-270 | 30-80 | 40-80 | 2~3 |
PU | 195-230 | 20-40 | 80-90 | 2~3 |
HDPE | 200-260 | 30-70 | NO need | 0 |
LDPE | 180-240 | 20-60 | NO need | 0 |
ACETAL | 180-210 | 50-120 | ||
POM | 160-280 | 10-80 | 60-70 | 2~3 |
HIPS | 170-250 | 10-80 | 60-80 | 2~4 |
PVC | 180-210 | 30-50 | 40-70 | 2~3 |
PMMA | 180-260 | 50-80 | 70-80 | 3~5 |
SAN | 180-270 | 40-80 | 70-80 | 2~4 |
PBT | 220-260 | 50-100 | 120-140 | 3~4 |
PBT Glass Fiber | 230-270 | 80-110 | 120-140 | 3~4 |
PA6 | 230-260 | 60-90 | 75-90 | 4~6 |
ABS+PC | 240-290 | 90-110 | 100-120 | 2~4 |
PBT+GF | 250-270 | 60-100 | 120-140 | 3~4 |
PA66 | 260-290 | 60-100 | 75-90 | 3~5 |
PET | 260-290 | 120-140 | 120-160 | 2~4 |
PP+GF | 260-280 | 50-80 | 40-90 | 2~3 |
PA6+GF | 270-300 | 70-120 | 75-80 | 4~6 |
PC | 280-320 | 80-100 | 110-120 | 2~4 |
PEEK | 340-390 | 120-150 | 140-150 | 2~4 |
SAN+30% GF | 250-270 | 50-70 | ||
PS+30% GF | 250-290 | 40-80 | ||
PP+30% GF | 240-290 | 30-50 | ||
PP+30% GF Talc Filled | 250-290 | 40-80 | ||
NYLON 11 | 220-250 | 40-110 | ||
NYLON 12 | 190-200 | 40-110 | ||
CAB | 170-240 | 40-50 | ||
ABS/PC ALLOY | 245-265 | 40-80 | ||
* The temperature shown is for reference, it may have some different from different manufacturer .
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Maintaining an appropriate mold temperature is not just about reaching a certain degree; it's about ensuring that this temperature is uniformly distributed across the entire cavity surface. This uniformity is crucial because any variations can lead to differential shrinkage and internal stresses within the molded part. Such inconsistencies often result in deformation or warping upon ejection from the mold, compromising the structural integrity and aesthetic quality of the product.
The mold temperature's influence extends beyond just the physical properties of the molded item; it also impacts the molding cycle time and overall efficiency of the production process. Starting from the lowest suitable mold temperature for the specific plastic resin used is a wise approach. However, adjustments are often necessary based on real-time observations of product quality and performance.
In conclusion, understanding and controlling the melting temperature of plastic resin, alongside ensuring even distribution of mold temperature, are essential for successful injection molding. These factors work in tandem to dictate not only the quality of the molded parts but also the efficiency and cost-effectiveness of the manufacturing process.
