New developped PVC extrusion profile for power socket rail
others
Parts of the stiffener, convex, metal insert
by：CSSSLD
2021-02-03
Injection tooling design thread is generally used in static connection parts, thread forming method can be divided into four categories: 1.
With self tapping screw tap the thread.
2.
Molding forming screw, including the use of metal insert to forming with internal thread.
3.
Press the screw thread insert into parts after molding.
4.
Machining.
According to the thread tooth profile, the commonly used plastic thread has a rectangular, trapezoidal thread, sawtooth thread, triangles, circles and so on.
plastic pieces of the hole can be one-time formation during molding, can be in the process of products secondary processing, drilling with mechanical method. Shape and design of the location of the hole to not increase the complexity of the mold and molding process. Between holes and hole, hole and the edge of the plastic parts should be adequate distance, aperture size and the depth of the hole has a certain relationship, and is associated with the material and forming method of stamping. Hole is not suitable in the location of the weaken the strength of plastic parts.
should not be brittle material, easy to cause stress cracking of plastics design insert, insert the surrounding plastic layer thickness shoulds not be too thin, prevent the plastic cracking caused by shrinkage, as far as possible with circular cross section or symmetric shape for the evenness of contraction. Insert should not from the plastic edge or too close to the surface, but also between the embedded application a certain distance, avoid the unilateral insert design, so that easy to make plastic parts warp or crack, if only one insert should be placed the insert in the center of the plastic parts.
convex platform is used to enhance hole on plastic parts or the use of strength as such as self tapping screw or the spiral twist into a convex part of the fasteners to provide located area. Convex platform is usually bear the part of stress and strain, especially for accepting self tapping screw, convex its size design must consider the design of the convex platform can not only inherit the screw insertion force, and can withstand the screw work under load. Design includes convex convex platform height, diameter, taper, inner hole diameter and depth, quantity and convex set, size and selection of materials, the type of screw, screw diameter and so on.
many plastic parts often need to set different shapes of metal insert. Used for the connection between the various components, which are common in household appliances. With internal thread of the metal insert for detachable connection, convenient operation, and has a high bonding strength. To improve the mechanical strength, wear life and size stability and accuracy. Thermal conductivity, heat transfer effect, such as in a plastic gear and belt pulley drive a central hole, often use round metal shell or insert metal shaft, both to improve the function of the overall strength of parts, but also have the effect of metal heat conduction heat transfer.
stiffener is solid, also has with hollow stiffener, the molding methods, and products related to the design requirements. The turning point in the plastic side wall reinforcement, also called gusset. To support the plastic parts wall with gusset, can increase the strength and rigidity of plastic injection molding processing, meet the requirements of the use of plastic parts. The design of the gusset size mainly depends on the thickness of the wall. Plastic design of holes, some are for assembly parts, and some of them are in order to achieve the purpose of cooling, ventilation.
insert structure usually complicating the mould structure and molding process to bring trouble. Therefore, more use of insert into process, after, after stamping shape using a variety of auxiliary embedding method, install the insert and fixed to the preset hole. In addition, the insert for the recycling of plastic parts removed also can bring a lot of inconvenience. Insert material should be with the surrounding plastic material coefficient of thermal expansion, as close as possible to avoid the shrinkage rate differences and produce larger stress, causing parts easy to crack.
more excellent articles: polystyrene foam plastic, click directly.
http://www。 csssld。 cn//html/2017/Info_0228/508。 HTML
nantong on suye's official website: http://www. csssld。 cn//
plastic pieces of the hole can be one-time formation during molding, can be in the process of products secondary processing, drilling with mechanical method. Shape and design of the location of the hole to not increase the complexity of the mold and molding process. Between holes and hole, hole and the edge of the plastic parts should be adequate distance, aperture size and the depth of the hole has a certain relationship, and is associated with the material and forming method of stamping. Hole is not suitable in the location of the weaken the strength of plastic parts.
should not be brittle material, easy to cause stress cracking of plastics design insert, insert the surrounding plastic layer thickness shoulds not be too thin, prevent the plastic cracking caused by shrinkage, as far as possible with circular cross section or symmetric shape for the evenness of contraction. Insert should not from the plastic edge or too close to the surface, but also between the embedded application a certain distance, avoid the unilateral insert design, so that easy to make plastic parts warp or crack, if only one insert should be placed the insert in the center of the plastic parts.
convex platform is used to enhance hole on plastic parts or the use of strength as such as self tapping screw or the spiral twist into a convex part of the fasteners to provide located area. Convex platform is usually bear the part of stress and strain, especially for accepting self tapping screw, convex its size design must consider the design of the convex platform can not only inherit the screw insertion force, and can withstand the screw work under load. Design includes convex convex platform height, diameter, taper, inner hole diameter and depth, quantity and convex set, size and selection of materials, the type of screw, screw diameter and so on.
many plastic parts often need to set different shapes of metal insert. Used for the connection between the various components, which are common in household appliances. With internal thread of the metal insert for detachable connection, convenient operation, and has a high bonding strength. To improve the mechanical strength, wear life and size stability and accuracy. Thermal conductivity, heat transfer effect, such as in a plastic gear and belt pulley drive a central hole, often use round metal shell or insert metal shaft, both to improve the function of the overall strength of parts, but also have the effect of metal heat conduction heat transfer.
stiffener is solid, also has with hollow stiffener, the molding methods, and products related to the design requirements. The turning point in the plastic side wall reinforcement, also called gusset. To support the plastic parts wall with gusset, can increase the strength and rigidity of plastic injection molding processing, meet the requirements of the use of plastic parts. The design of the gusset size mainly depends on the thickness of the wall. Plastic design of holes, some are for assembly parts, and some of them are in order to achieve the purpose of cooling, ventilation.
insert structure usually complicating the mould structure and molding process to bring trouble. Therefore, more use of insert into process, after, after stamping shape using a variety of auxiliary embedding method, install the insert and fixed to the preset hole. In addition, the insert for the recycling of plastic parts removed also can bring a lot of inconvenience. Insert material should be with the surrounding plastic material coefficient of thermal expansion, as close as possible to avoid the shrinkage rate differences and produce larger stress, causing parts easy to crack.
more excellent articles: polystyrene foam plastic, click directly.
http://www。 csssld。 cn//html/2017/Info_0228/508。 HTML
nantong on suye's official website: http://www. csssld。 cn//
Custom message
Related Products
