What process is involved in the production and molding of plastic sheets?
Time：
2019-01-23
Plastic foam extruders must be selected according to the material of the plastic sheet; different plastics require extruder screw designs tailored to their specific properties. Since each type of plastic exhibits varying degrees of plasticizing capability, the required processing temperatures and extrusion pressures also differ. Therefore, when selecting an extruder, it is essential to match it with the sheet’s material. During the extrusion of plastic sheets, flat die heads are typically used, and the forming processes for sheets of different hardnesses remain consistent. Similar to the production of plastic pipes, some products are formed directly through the die head.
Plastic foam extruders should be selected based on the material of the plastic sheet; different plastics require distinct screw designs in the extruder. Since each type of plastic has varying plasticizing capabilities, the required processing temperatures and extrusion pressures also differ. Therefore, when manufacturing, it is essential to choose an extruder that matches the specific material of the sheet.
When extruding plastic sheets, plastic extruders typically use flat die heads. Regardless of the sheet’s hardness, the same forming process is employed. Similar to the production of plastic pipes, some products can be obtained directly by cooling the extruded material after it exits the die, while others require a cold‑pushing technique during manufacturing.
For example, some plastic sheets, in order to maintain dimensional consistency and extrusion stability during production, must undergo vacuum forming after extrusion. Consequently, different types of plastic sheets require distinct manufacturing processes.
Extruders can be classified in many ways according to their type, but based on their forming principles, they are broadly divided into plastic extruders and rubber extruders. As for equipment pricing, the selling price is typically determined by adding a reasonable profit margin to the product’s production cost. Regarding extruder prices, they are generally set according to the machine’s manufacturing cost; standard plastic extruders usually come with lower‑end configurations than rubber extruders. Consequently, when comparing plastic and rubber extruders of the same model, rubber extruders tend to be more expensive.
Rubber extruders typically consist of an extruder screw, a barrel, an extrusion die, a water‑cooled temperature‑control system, a power‑supply unit, a drive system, and an intelligent electrical control cabinet. Nowadays, some customers also require rubber extruders to feature communication capabilities; as a result, the level of automation and intelligence in production is steadily increasing, which makes rubber extruders considerably more expensive than plastic extruders.
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