Principle children garden tools machinery blade

Selection of parting surface consideration principle: 1 the quality of plastic parts considered Ensure the dimension precision of plastic parts B. select the parting surface, consideration should be kids garden tool set  to reduce the draft caused by plastic parts size end size difference, if the mould nest in male die, because the draft caused by plastic parts size end size difference is too big, when the plastic parts with draft larger does not allow, the structure that is difficult, if children garden the appearance of the tools without strict requirements, but will die in the plastic part, it can be used to draft the smaller to release to ensure that the plastic surface requirement: parting surface as plastic garden tools set  without affecting the appearance of the plastic parts and plastic parts appearance requirements. Technical specifications of 2 injection machine account: A. mode locking force is considered: as much as possible to reduce the projection area of the plastic parts in the parting plane. When the maximum injection area projection area of plastic parts in the parting surface is close to close to the injection machine, has produced the overflow may, machinery blade die parting surface size to ensure no overflow condition, it should be possible to reduce the parting surface contact area, contact pressure to increase the die surface, prevent overflow, and simplify the parting surface processing. The B. template spacing to consider: parting surface is determined to ensure that the male and the female mould opening stroke the shortest. Consider 3 mechanical blade structure A. try to simplify mold parts A. for children garden tools release, should make the plastic parts in the mold in the mold as much as possible, as long as the plastic snow scoops  binding force and the male die than plastic binding force to piece and the female die, as far as possible the binding force between the plastic and die so ugly, but don't put the plastic parts with blade and mechanical force on the male die. B. when the plastic parts of the shape is simple, but the inner shape more complex hole or holes, plastic molding must remain in the mold, the mold fossa can be located in the master mold, the mold can be used to push plate plastic parts, if the mould nest in the public mode, the difficulty of stripping. C. when a metal insert, because insert will not shrink wrapping die, so die wo should be located in the mold, or opening the mould in plastic parts mold, the difficulty of stripping. D. if the plastic mold is symmetrically distributed, should be forced to remain in the public mode of plastic parts, pipe jacking demoulding. B. side core pulling mechanism considering. A. should try to avoid the side core pulling mechanism, if cannot avoid the side core pulling, should make the core pulling as short as possible. B. due to inclined sliding block mould locking force is small, for large plastic parts projected area larger, the plastic leaf rakes  parts projection area of parting surface on the main plane in the male and the female mold clamping, and will die projection area smaller surface as a side parting surface, otherwise the slanting slide lock locking device must be very large, or the lock is not tight and flash C. convenient pouring system arrangement: the parting surface is determined not to impede the normal opening gating system. D.: children garden tools in order to facilitate the exhaust is conducive to the discharge gas, the parting plane as far as possible with the material flow end overlap. E. is easy to insert placed: when parting surface after opening, to have a certain space insert. Simplify the overall structure of F. mechanical blade, minimize the number of parting surface, as far as possible the use of flat type surface. Consideration should also be given to mechanical blade is easy processing, easy to take out the finished products, and the parting surface should be chosen in the product line. 4 mechanical blade manufacturing difficulty consideration: to ensure mechanical blade easy mechanical processing.