Slitting preparation method suitable for hot-melt pre-impregnated filament

• Main Authors: WANG JUNFENG, LI HONG, SHEN DENGXIONG, ZHANG JIANBAO, SUN WENWEN, ZHENG HONGFEI, ZHANG YIMENG, CHEN LIANG, ZHAO CONGHUI, ZHAO WENYU, QIANG JISEN
• Format: Patent
• Language: English
• Published: 09.12.2015
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention provides a slitting preparation method suitable for a hot-melt pre-impregnated filament. The slitting preparation method comprises the following steps: in a low-temperature tank ranging from 5 DEG C to the room temperature, uncoiling a pre-impregnated belt with paper back lining and plastic coating by virtue of an uncoiling assembly; after being forcibly cooled, feeding the pre-impregnated belt to an upper cutter and a lower cutter to carry out slitting, wherein the slitting width of the pre-impregnated belt ranges from 4mm to 12 mm; transmitting slit pre-impregnated filaments with coating as wide as the pre-impregnated belt to a coiling assembly, and fitting plastic coating with width greater than those of the pre-impregnated filaments with the pre-impregnated filaments with coating as wide as the plastic coating; and finally, winding, according to a fixed line shape, the pre-impregnated filaments with upper and lower layers of plastic coating to a pre-impregnated filament coiling shaft of the coiling assembly. According to the slitting preparation method, in order to solve the problems that a great number of pre-impregnated filaments have roller-sticking, folding, filament-splitting, width-reducing, and the like because of great viscosity in a high-viscosity pre-impregnated filament coiling process, the invention discloses a method for carrying out slitting coiling on the pre-impregnated belt under a low-temperature condition, thereby preventing problems such as knife-sticking, roller-sticking, filament-winding, width-reducing and the like in a pre-impregnated filament slitting process.