注射模具外文翻譯---注射模具的介紹-模具設(shè)計(參考版)
2025-01-23 03:51本頁面
【正文】 re talking about here. Most people have probably seen runners before and not realized it. The most likely place to see them are in model airplane/car kits as the individual ponents are left attached to the runner system. Typically the runners are ejected into a chute below the mold or else they will be picked out of the mold by a robotic arm and dumped into a regrinder. The regrinder chops the runners into bits and prepares them to be moved back into the dryer. Though, once plastic has been heated, it degrades a bit and some molding processes will 10 not allow for regrind to be mixed back in with virgin material as it can cause problems with the final part. In cases like this the regrind is used elsewhere or it is discarded pletely. Shrinkage plays a crucial role in molding and most plastic shrinks 20% as it cools. In order to bat this phenomenon in critical plastic pieces (not really toys) it is up the mold designer to build this factor into his design so that the finished parts will meet the original product design specifications. Ejector pins are part of the mold itself and are used to push the molded parts from the cavity once the mold is opened. This ejecting process is controlled by the molding machine. The molding cycle is basically close shoot open eject. The mold is clamped into the machine with the front half remaining stationary (on the barrel side of the machine) and the back half being the movable half. Also on this movable half are the ejector pins that push the molded parts from the cavity. The parting surfaces of a mould are those portion of both mould plates, adjacent to the impressions, which butt together to form a seal and prevent the loss of plastic material from the all molds open up, the parts are stuck to the back half of the mold so that they can be ejected with the builtin pins. These are related to the introduction of the injection mold. 。s connected to the runner. There are ways around having sprues and runners, but it39。s essentially a large screw housed in a heater which moves the plastic closer to the mold. As the screw turns, the plastic traverses the barrel and reaches a molten state. Only when it39。s initial holding chamber. This chamber is actually a small hopper on the back of the barrel of the machine。s response capacity and speed. Injection Mold consists of a number of plate which mass with the various ponent parts. It divided into: A molding device (Die, punch)B positioning system (I. column I. sets) C fixtures (the word board, codepit) D cooling system (carrying water hole) E thermostat system (heating tubes, the hotline) FRoad System (jack Tsui hole, flow slot, streaming Road Hole) G ejection system (Dingzhen, top stick). Type of mold It can be divided into three categories according to gating system with the different type of mold :(1) intake die: Runner and gate at the partig line,it will strip together with products when in the open mode,it is the most simple of design, easy processing and lower more people operations by using large intake system. (2) small inlet die:It general stay in the products directly,but runner and gate are not at the partig ,it should be design a multioutlet parting then it is more plex in the designing, more difficult in processing, generally chosing the small inlet die is depending on the product’s requirements. (3) hot runner die:It consists of heat gate, heat runner plate, temperature control box. Hot runner molds are two plate molds with a heated runner system inside one half of the mold. A hot runner system is divided into two parts: the manifold and the drops. The manifold has channels that convey the plastic on a single plane, parallel to the parting line, to a point above the cavity. The drops, situated perpendicular to the manifold, convey the plastic from the manifold to the part. The advantages of hot runner system ： (1)No outlet expected, no need processing, the whole proce
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