SIMAF PRESENTATION

SIMAF SCREWS

POLYPLAST

SCREWS FOR PLASTICS POLYPLAST 32

SCREWS FOR PLASTICS POLYPLAST 32 MATERIALS : - STANDARD : ZINC-PLATED STEEL,WHITE. - ON REQUEST : INOX A2. ZINC-PLATED YELLOW CHROMATED STEEL. DACROMET®, PHOSPHATIZATION, JS 500. VERSIONS :FLAT OR SHARP END.

POLYPLAST GENERAL FACTS Why 60° thread of tapping screws does not fit for plastics assembly. Stud formation by deformation Stud formation by deformation high radial tension. high radial tension. Weak penetration of thread in the material Weak penetration of thread in the material small holding to wrenching. small holding to wrenching. Bad quality of formed nut Bad quality of formed nut high possibility to fail the assembly. high possibility to fail the assembly. Small area of contact between the screw and the material Small area of contact between the screw and the material low holding to unscrewing by vibration. low holding to unscrewing by vibration. 32

Geometry of the screws thread had to adapt to demands of new materials, to improve tapping-screws performance. 32 POLYPLAST GENERAL FACTS

POLYPLAST USE Assembly in only one operation (suppression of tapping). Elimination of tapping chips. Assembly in only one operation (suppression of tapping). Elimination of tapping chips. Elimination of costs of cleaning blind holes. Elimination of costs of cleaning blind holes. Suppression of pollution risks. Suppression of pollution risks. 32

POLYPLAST THREAD Elimination of possibility to damage the threads of the nut by a bad alignment at the beginning of screwing. Elimination of possibility to damage the threads of the nut by a bad alignment at the beginning of screwing. 32

symmetrical thread of 40° symmetrical thread of 40° instead of 60°. instead of 60°. Application : Application : Multiple possibilities of use. Multiple possibilities of use. Cylindrical form 32 POLYPLAST SCREWS POLYPLAST THREAD

Easier penetration in the material. Easier penetration in the material. Better area of contact with the plastic. Better area of contact with the plastic. Virtual nut better formed. Virtual nut better formed. 32 Pitch = p POLYPLAST THREAD

Plastic is less displaced. Plastic is less displaced. The nut created in the plastic is more resistant. The nut created in the plastic is more resistant. 32 Volume of displaced plastic Thread for plate Polyplast thread POLYPLAST THREAD

Asymmetrical thread 12,5° on the load flank. Asymmetrical thread 12,5° on the load flank. Application : Application : high performing screw for plastics. Cylindrical form 32 SCREWS FOR PLASTICS POLYFORM POLYFORM SCREWS

High holding to wrenching Asymetrical thread.Asymetrical thread. Loading flank with a 12.5° angle.Loading flank with a 12.5° angle. Guide flank with gradual angle.Guide flank with gradual angle. 32 Guiding flank Pull-out POLYFORM THREAD Loading flank

Asymetrical distribution of the material The radial force on the load flank (Fr1 )is inferior to the one of the guide flank what provokes a traverse of material to the load flank. The radial force on the load flank (Fr1 )is inferior to the one of the guide flank what provokes a traverse of material to the load flank. Concentration of the material on the load flank. Concentration of the material on the load flank. Better holding to wrenching. Better holding to wrenching. Better resistance to unscrewing. Better resistance to unscrewing. PLASTIC 32 Pull-out Rotation of plastic POLYFORM THREAD

POLYFORM SCREWING Low screwing torque. Low screwing torque. High ruin torque High ruin torque = High security during screwing. = High security during screwing. 32 Mechanical properties of assembly

POLYFORM PULL-OUT RESISTANCE Mechanical properties of assembly POLYFORM diameter 4 mm GREAT HOLDING TO WRENCHING IN THERMOPLASTICS AND HARD PLASTICS 32

TRILOBULAR SCREWS POLYPLAST What is a trilobular screw ? The trilobular form permits concentrating the effort of tapping on three points and reducing the friction during screwing. The trilobular form permits concentrating the effort of tapping on three points and reducing the friction during screwing. 32 D = diameter of the screw C = circumscribed diameter of the screw K = measure of lobularity

TRILOBULAR POLYPLAST HIGH TORQUE RESISTANCE Screw with loching coating Screws with washers Grower or notched Elimination of washers Grower or notched. Elimination of washers Grower or notched. Elimination of thread-lockers (coating or others). Elimination of thread-lockers (coating or others). 32

TRILOBULAR POLYPLAST TORQUE AND PULL-OUT RESISTANCE With plastic memory, the material fills the space between the lobes. With plastic memory, the material fills the space between the lobes. Resistance to unscrewing (self-locking). Resistance to unscrewing (self-locking). Resistance to wrenching. Resistance to wrenching. 32 D=diameter of the screw C=circumscribed diameter of the screw K=measure of lobularity

TRILOBULAR POLYPLAST Trilobular screw for plastics Symmetrical thread 45° Symmetrical thread 45° Application :Good performances in thermoplastics. Application :Good performances in thermoplastics. 32

METRIC TRILOBULAR SCREWS TRILOCK 33 Trilobular form of the thread guaranties a perfect union between the screw and the created nut. The point with double-angle permits an easy installation of the screw and ensures a formation of thread with a low tightening torque.

Small torque of tapping High torque of ruin Small torque of tapping High torque of ruin 33 TRILOK TRILOK

TRILOK 33 loose Oversized thread

TRILOK Holes bordered with steel 33

TRILOK Holes moulded in alloys ANGLE 1°-11 ’

TRILOK Drilled holes 33

TRILOBULAR SELF-TAPPING SCREWS FOR THIN PLATES ROLOK 33

ROLOK DIMENSIONS AND CHOICE 33

The screws form a nut into thin sheets either in steel or aluminium. 33 ROLOK DIMENSIONS AND CHOICE

RECAP BOARD 32 & 33

PLASTIC SCREWS

APPLICATION Customer : Customer : DCM PRECISION Field of activity :. Field of activity : Cutting-off, shaping, tool-making. Manufacturing :. Manufacturing : Scale model of thermic car. Simaf item : Simaf item : 32 / TC 3X8PZD. Quantity of inserts per product :. Quantity of inserts per product : 4. Annual quantity : Annual quantity : 50,000 pcs. Application : Application : Fastening of coachbuilding on the chassis. Fastening of the suspension. 32/TC3X8PZD

APPLICATION Customer : Customer : GE-INTERLOGIX Field of activity :. Field of activity : Anti-intrusion alarms. Manufacturing : Manufacturing : Alarms for individual houses and industries. Simaf item :. Simaf item : SERPLAST-POLYPLAST-Screws for metals with washers. Application : Application : Detector of intrusion by windows. Special SERPLAST 40/THC025H050, head diameter 6mm, 6 inserts per product, 500,000 pcs a year. POLYPLAST 32/TF2.5X8PZD, two screws per product, 1 million pcs a year. Scerws for metals witn washers, 39/TCM2.5X65PZDF, 4 screws per product, 1.5 million pcs a year. 39/TCM2.5X65PZDF 40/THC025H050 32/TF3X6PZD

APPLICATION Customer : Customer : GIRPI Field of activity : Field of activity : Plastic industry. Manufacturing : Manufacturing : Manufacturer of rubber and plastic tubes and pipes. Simaf item : Simaf item : 32/TCF5X12PZD. Quantity of inserts per product : Quantity of inserts per product : 1. Annual quantity : Annual quantity : 1 million pcs. Application : Application : Fastening of the two parts of the plastic hinge. 32/TCF5X12PZD

APPLICATION Customer : Customer : LEXMARK Field of activity : Field of activity : Printers. Manufacturing : Manufacturing : Cartridges for printers. Simaf item : Simaf item : POLYPLAST 32/LEX/TC3X10PPZD. Quantity of inserts per product : Quantity of inserts per product : 12. Annual quantity : Annual quantity : 6 million pcs. Application : Application : This trilobular screw for plastic is zinc- plated black and is used to fasten cartridges for LEXMARK printers. 32/LEX/TC3X10PPZD