EF Duro Plus Screw for plastic

EF-Duro Plus thread-cutting screws are designed to meet the stringent requirements of thermoset plastics, making assembly easier and ensuring a strong, dependable joint to maximize assembly performance. The Duro plus screw is a thermosetting plastics direct screw fastener.The design incorporates a number of distinct features that provide designers with a highly effective direct screw fixing for these materials.The cutting notch, in conjunction with the profiled thread root and special thread form, allows for low installation and high stripping torques.When used in thermosets, the efficient removal of cutting debris ensures greatly reduced bursting forces, providing a solution to a common problem associated with conventional self tapping screws. The EF Duro Plus Screw has many features.These are;

· Threads are cut in stiffer plastics.

· Improves assembly performance

· An asymmetrical thread profile that is inclined toward the load surface increases friction while decreasing radial stress.

· Torsion and tensile strength

· Installation torque and radial stress are reduced.

Can You EF Duro Plus Screw Into Plastic ?

When screwed into plastic material with either pre-drilled or moulded pilot holes, EF Duro Plus screws for plastics form or tap threads. These are an inexpensive way to join two plastics or metals to plastics and allow for easy disassembly and reassembly. Can be used in conjunction with the majority of fasteners used to join plastic, wood, and metal.

Tighten the fasteners until resistance is felt, then distribute the pressure by using large washers under the heads and nuts of the bolts or EF Duro Plus screws.Plastics are more temperature sensitive than metals and other materials. Inflating to the limits of fasteners can cause them to crack or break. Pop rivets are a more permanent way to join two parts, but they must be attached with a rivet tool and cannot be removed without drilling holes. Screwing into plastic differs from screwing into wood. EF Duro plus screws have a smaller flank angle than standard screws, which minimizes the internal radial stresses generated during the removal and deformation of plastic.

Because the root diameter is smaller than that of a standard fastener, the thread engagement (CM) is diametrically greater, increasing the holding power on soft plastic compared to metal.

Features and Advantages of using EF Duro Plus Screw for plastic

· Asymmetrical 30° thread profile that is inclined towards the frictional resistance (FR) between the application and the fastener.

· EF Duro Plus screw decreases radial stress

· EF Duro Plus decreases back-out caused by relaxation

· EF Duro Plus enhances strip resistance

· EF Duro Plus eliminates need for supplementary locking devices

· EF Duro Plus enhances load-carrying capability

· Thread pitch that is optimal for deeper thread engagement

· EF Duro Plus It enhances pull-out strength

· EF Duro Plus enhances resistance to vibration loosening

· EF Duro Plus enhances load-carrying capability

· Its recessed thread root allows for the displacement of material.

· EF Duro Plus reduces installation torque

· EF Duro Plus reduces the possibility of thread clogging and galling during assembly.

· Shank slots reduce chip production.

Disadvantages of using EF Duro Plus Screw for plastic

· The EF Duro Plus Screw Only can be disassembled and reassembled up to 10 times.

· The EF Duro Plus Screw allows for stress concentration or amplification.

· It is very difficult to manage the tightening torque on The EF Duro Plus Screw

· The EF Duro Plus Screw increases the number of parts

· The EF Duro Plus Screw can affect the aesthetics of the final product

Design Guide For EF Duro Plus Screw joints For Plastics

Because of its versatility and material options, plastic provides numerous opportunities for engineering product designers. However, joining plastics together or joining plastics to another material presents some unique challenges, such as the use of fasteners and threads.Because of their wide flank angle and shallow threads, standard screws and EF Duro Plus screw for metal such as type A and type AB, are not suitable for plastic. They are commonly used on sheet metal and thick plastic sheets, such as UPVC frames. Each type of plastic has its own set of performance challenges, such as ductility, thermal expansion, and clamp retention. Choosing a fastener that best meets these requirements is critical to achieving a successful screw joint in your product designs.With so many polymer options, it's always a good idea to put your screw joint to the test in order to find the best screw type and design.

Properties Of Plastic Materials

· The following plastic properties have an impact on the performance of EF Duro Plus screw

· joints.

· stiffness of the material (Flexural modulus of plastic)

· Fillers and additives (Filler, reinforcement content and type)

· The rate of thermal expansion

· The rate of creep