What are the temperature requirements for acrylic cream jar material processing

In the production process of acrylic cream jars, injection molding and coating processes are two key links, and the temperature control in them directly affects the quality and production efficiency of the product.

Temperature control in injection molding
Injection molding is an important process for producing acrylic cream jars and its temperature control involves three aspects: barrel temperature, mold temperature and injection temperature.
Barrel temperature is a key factor in ensuring uniform melting of acrylic resin. The appropriate barrel temperature range is usually 200-250℃. If the temperature is set too low, the melting effect of the resin is not good, which may lead to injection difficulties and increased internal stress of the product; while too high a temperature may cause the resin to decompose, resulting in bubbles and color changes. Therefore, precise control of the barrel temperature is crucial to ensure smooth production.
Mold temperature has a direct impact on the cooling rate and curing quality of the product. The ideal mold temperature range is 40-80℃. Too high a mold temperature will slow down the cooling rate of the product, resulting in shrinkage deformation and dimensional instability; on the contrary, too low a mold temperature may cause the product to cool too quickly, resulting in internal stress and surface cracks. Therefore, the adjustment of the mold temperature needs to be reasonably set according to the thickness and shape of the product.
Injection temperature refers to the temperature of the resin when it is injected into the mold. It should be set higher than the melting temperature of the resin but lower than the decomposition temperature. Too high an injection temperature may cause the resin to decompose and generate gas and impurities, while too low an injection temperature will affect the filling effect and surface quality of the product. Therefore, the control of injection temperature is an important link to ensure the quality of product molding.

Temperature control in hot stamping
The hot stamping process is a key step in stamping patterns and texts on the surface of acrylic cream jars. Temperature control is equally important in this process, mainly including mold heating temperature and heating time.
The mold heating temperature should be adjusted according to the thermal expansion coefficient and softening temperature of the acrylic material. It is usually controlled between 100-150℃. If the heating temperature is too high, the material may soften excessively, causing the pattern and text to deform; while the heating temperature is too low, the material will not soften enough, affecting the stamping effect. Therefore, a reasonable heating temperature is the basis for ensuring the quality of stamping.
The length of the heating time directly affects the softening degree of the material. Too long a heating time may cause the material to soften excessively, causing the pattern and text to be blurred, while too short a heating time may cause the material to soften insufficiently, resulting in poor stamping effect. Therefore, the adjustment of heating time needs to be considered comprehensively in combination with the mold heating temperature and material thickness to achieve the best embossing effect.

Temperature control in coating
The coating process is crucial to improving the surface quality and aesthetics of acrylic cream jars, and temperature control cannot be ignored in the coating process, mainly involving coating drying temperature and curing temperature.
The coating drying temperature needs to be reasonably set according to the type and performance of the coating. It is usually controlled between 60-80℃. Too high drying temperature may cause the coating to volatilize too quickly, forming cracks and bubbles; while too low drying temperature will cause the coating to dry slowly, affecting adhesion and color stability. Therefore, accurate drying temperature control is essential to ensure coating quality.
Coating curing temperature is the key to ensure that the coating forms a firm protective film. The setting of curing temperature should be adjusted according to the characteristics of the coating. Too high curing temperature may cause the coating to decompose, produce gas and impurities, while too low curing temperature may cause incomplete curing of the coating, affecting its weather resistance and adhesion. Therefore, reasonable control of curing temperature is a necessary condition to ensure coating quality and durability.