New developped PVC extrusion profile for power socket rail
others
The design of injection mold demoulding mechanism
by：CSSSLD
2021-01-23
(
1)
General principles of A mold demoulding mechanism design.
Requirements in the process of open mould plastics in dynamic model on one side, is located in the dynamic model on one side, as far as possible in order to launch institutions so as to simplify the mould structure.
B。 Correct analysis of plastic parts for mold package force and adhesive force of size and distribution, targeted to choose reasonable the launch of the device and launch position, make the size and distribution of the ejection force is consistent with the ejection resistance; Launch power point should be close to the plastic parts for the location of the maximum punch bags force, at the same time should also be molded parts stiffness and strength, the location of the maximum; Forces face some as large as possible, in order to prevent the plastic deformation or damage in process was introduced.
C。 Launch location should be as much as possible in plastic parts inside or on the part of the plastic parts surface impact, to strive for good plastic parts surface. D。 Launch institutions should be of simple structure, reliable operation, flexible, telecontrol manufacturing and convenient maintenance.
( 2) Push a plate of parting design combined with the design of various factors, decided to push off a plate material is used on this pair of mould method of stripping. In pushing a plate stripping, by positioning pin and positioning guide pin on the positioning, in order to prevent the ejecting board hole between the core and excessive wear and migration. : (as shown 3) Avoid empty between the core and the design requirements of pushing a board to periods of high precision and uniform. Want to push a plate flexible mold release and reset, and cannot have spilled material melt material overflow, the largest single control around 2 silk, because ABS viscosity is higher. Work in order to prevent excessive wear and deformation occlusion occurs, push plate and core should be tested for quenching process. And what is more, in push plate and core with unilateral between 0. 2 or so distance to avoid the contact between the two. And taper fitting surface its auxiliary positioning function, can prevent the push plate hole eccentric and cause material overflow, the slope of 5 ~ 10 o o. Here take 5 o. As shown in figure:
( 3) The design of the locating ring
this choice in the design of gate set and locating ring is set according to the separate form, consider locating ring diameter is larger,, the use of the overlapped locating ring way to gate set on the fixed mould plate reinforcement and positioning. Locating ring also have standard parts, there are injection molding machine model choice, but also needs to use, will be according to the size of two threaded holes on it, According to the need to drill) You can.
injection mold what are the common problems in the test?
to solve common problems in injection mold test, have to know where the problem is out in, to solve the problem. Let's talk a mould are common problems in the test. A: the main runner stick model of the solution: polishing the main runner,
in the nozzle and the mould heart overlap, reduce the mold temperature, injection time, increase the cooling time, check the nozzle heating circle, polishing mold surface, check whether the material is polluted. 2: plastic demoulding difficult solution: reduce the injection pressure, injection time, increase the cooling time, mold temperature reduction, polishing mold surface, increase of draft, reduce the set of three blocks: size stability of the solution: change the cylinder temperature, injection time, increasing the injection pressure, change the screw back pressure, elevated lower mold temperature, mold temperature control for feed rate, reduce material proportion back four: ripple on the surface of the method to solve the problem: adjusting for shoes, elevated increase injection time, mold temperature increase injection pressure, improve the material temperature, increasing the injection speed, increase the size of the runner and gate 5: plastic parts warp deformation and the method to solve the problem: the lower mold, decrease the temperature of the material, increase the cooling time, reduce the injection speed, reduce the injection pressure, increase the screw back pressure, injection time.
B。 Correct analysis of plastic parts for mold package force and adhesive force of size and distribution, targeted to choose reasonable the launch of the device and launch position, make the size and distribution of the ejection force is consistent with the ejection resistance; Launch power point should be close to the plastic parts for the location of the maximum punch bags force, at the same time should also be molded parts stiffness and strength, the location of the maximum; Forces face some as large as possible, in order to prevent the plastic deformation or damage in process was introduced.
C。 Launch location should be as much as possible in plastic parts inside or on the part of the plastic parts surface impact, to strive for good plastic parts surface. D。 Launch institutions should be of simple structure, reliable operation, flexible, telecontrol manufacturing and convenient maintenance.
( 2) Push a plate of parting design combined with the design of various factors, decided to push off a plate material is used on this pair of mould method of stripping. In pushing a plate stripping, by positioning pin and positioning guide pin on the positioning, in order to prevent the ejecting board hole between the core and excessive wear and migration. : (as shown 3) Avoid empty between the core and the design requirements of pushing a board to periods of high precision and uniform. Want to push a plate flexible mold release and reset, and cannot have spilled material melt material overflow, the largest single control around 2 silk, because ABS viscosity is higher. Work in order to prevent excessive wear and deformation occlusion occurs, push plate and core should be tested for quenching process. And what is more, in push plate and core with unilateral between 0. 2 or so distance to avoid the contact between the two. And taper fitting surface its auxiliary positioning function, can prevent the push plate hole eccentric and cause material overflow, the slope of 5 ~ 10 o o. Here take 5 o. As shown in figure:
( 3) The design of the locating ring
this choice in the design of gate set and locating ring is set according to the separate form, consider locating ring diameter is larger,, the use of the overlapped locating ring way to gate set on the fixed mould plate reinforcement and positioning. Locating ring also have standard parts, there are injection molding machine model choice, but also needs to use, will be according to the size of two threaded holes on it, According to the need to drill) You can.
injection mold what are the common problems in the test?
to solve common problems in injection mold test, have to know where the problem is out in, to solve the problem. Let's talk a mould are common problems in the test. A: the main runner stick model of the solution: polishing the main runner,
in the nozzle and the mould heart overlap, reduce the mold temperature, injection time, increase the cooling time, check the nozzle heating circle, polishing mold surface, check whether the material is polluted. 2: plastic demoulding difficult solution: reduce the injection pressure, injection time, increase the cooling time, mold temperature reduction, polishing mold surface, increase of draft, reduce the set of three blocks: size stability of the solution: change the cylinder temperature, injection time, increasing the injection pressure, change the screw back pressure, elevated lower mold temperature, mold temperature control for feed rate, reduce material proportion back four: ripple on the surface of the method to solve the problem: adjusting for shoes, elevated increase injection time, mold temperature increase injection pressure, improve the material temperature, increasing the injection speed, increase the size of the runner and gate 5: plastic parts warp deformation and the method to solve the problem: the lower mold, decrease the temperature of the material, increase the cooling time, reduce the injection speed, reduce the injection pressure, increase the screw back pressure, injection time.
Custom message
Related Products
