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US 2025/0050552 A1Published application
Method of producing thermoplastic sheet products and a corresponding production line
AssigneeThe Good Plastic Company International Limited
InventorNicolai TIBULEANCO
Life of this patent
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Abstract
A method and production line are provided for producing sheet products by thermopressing raw materials from thermoplastic plastics and may be used for manufacturing substantially flat products. The method includes thermopressing the raw materials from thermoplastic plastics under pressure to produce in at least one press, and subsequent cooling under pressure of a semi-finished sheet product in at least one other press. A mold with detachable parts may be used, starting from dosing and feeding the raw materials to thermopressing and cooling, and ending with removing a finished sheet product. A production line for producing the sheet products by thermopressing the raw materials from thermoplastic plastics is also provided.
Claims20
A method of producing sheet products from thermoplastic plastics, comprising:
- dosing raw materials from thermoplastic plastics for manufacturing at least one sheet product,
- feeding the dosed raw materials for heating thereof under pressure,
- heating the dosed raw materials under pressure in at least one hot press to produce a semi-finished sheet product,
- feeding the semi-finished sheet product for cooling under pressure,
- cooling of the semi-finished product under pressure in at least one cold press to produce a finished sheet product,
- wherein for dosing the raw materials, a mold is used, comprising at least a mutually detachable lower part of the mold and an upper part of the mold configured to cover the lower part of the mold from above,
- dosing the raw materials is carried out into the lower part of the mold in the amount required for manufacturing the sheet product,
- after dosing, covering the lower part of the mold with the upper part of the mold is performed to produce a closed mold,
- heating the dosed raw materials under pressure is performed using electric heaters and working plates of the hot press, between which the closed mold with the dosed raw materials is placed and using which pressure is applied to the dosed raw materials in the closed mold, and
- cooling the semi-finished product under pressure is performed using air flow and working plates of the cold press, between which the closed mold with the semi-finished product produced after the hot press is placed and using which pressure is applied to the semi-finished product in the closed mold,
- wherein removing the finished sheet product is carried out by opening the upper part of the mold,
- wherein feeding the dosed raw materials is performed for heating thereof under pressure and feeding the semi-finished sheet product is performed for cooling under pressure using a conveyor, on which the mold is placed.
9 more elements
A production line for producing sheet products from thermoplastic plastics, consisting of sequentially arranged elements, comprising:
- a pressing section with heating raw materials, provided with at least one hot press, and
- a pressing section with cooling a semi-finished product, provided with at least one cold press,
- wherein the sequentially arranged elements additionally comprise a section of raw material preparation and filling a mold with the raw materials located before the pressing section with heating the raw materials, and a section for removing a finished sheet product from the mold located after the pressing section with cooling the semi-finished product,
- the section of raw material preparation and filling of the mold with raw materials is provided with a procurement table with a surface for setting the mold and a movable hopper for pouring the raw materials into the mold,
- the mold comprises at least a lower part of the mold and an upper part of the mold mutually detachable, configured to cover the lower part of the mold from above,
- the hot press of the pressing section with heating the raw materials and the cold press of the pressing section with cooling the raw materials are both provided with a main frame, a lower working plate configured to move up and down relative to the main frame using power pneumatic actuators to create pressure within the mold and an upper working plate fixedly secured on the main frame, wherein electric heaters are placed on the area of said working plates of the hot press for heating the raw materials in the mold, and
- the cold press is provided with means of supplying cold air through the lower working plate and the upper working plate into the mold,
- wherein the section of removing the finished sheet product from the mold comprises a finished products table for disassembling the mold with the finished sheet product and removing thereof, provided with a surface for setting the mold with the finished sheet product, and
- a procurement table of the section of raw material preparation and filling the mold with the raw materials,
- the hot press of the pressing section with heating the raw materials, the cold press of the pressing section with cooling the raw materials, and the finished products table of the section of removing the finished sheet product from the mold are connected to each other by a conveyor laid between two frames located along said procurement table, hot press, cold press, and finished products table.
7 more elements
Dependencies are inferred from the claim text.