塑胶模具设计(doc17)-五金塑胶(编辑修改稿)

塑胶模具设计(doc17)-五金塑胶(编辑修改稿)内容摘要：

st trying mold, according the length of bending, o repair or adjust the 301 ponent, one slide as datum no adjust, the other slide also must be adjust. Plastics Mold Design Page 6 of 17 Created by zbx 111. In order to reduce the bend length ,you must care the cooling, so you must design cooling hole in the 301 ponent. 112. When you design this type of plastics mold, parting line must be designed according the max silhouette curves. Because if you designed by manned line, which somewhere was be length or shorted ,so that mold can be machined easier, this locate will easy be worn and torn so production will be easy to occur overflow. outlook will not be beautiful. 113. Like this part, when you discharge ,at first, you must roughly discharge this part at left and right side, then semifinish discharge this part from left and right side, at last ,finish discharge this part. If you discharge one side of this part from rough to finish at same time, then discharge the other side, you will not get to correctly result. being heating and no enough stiffness, making this part occur deformation. 114. When design the mold of plastic glass, the circle runner is often used. (plastic material name PMMA) 115. SKH51 used in plastic mold as core or cavity should be heated to 58 rather 61, because is coolsteel, when it is used at heat environment, it can be cracked. However, when it is used as tip or pin can be heattreated to 61HRC. Plastics Mold Design Page 7 of 17 Created by zbx 116. S10C, S20C is regard as iron. S45C, S55C is regard as steel. 117. Spring steel or Viking steel can be used in special constitution, such as insert. 118. ASP23 is a kind of good material having the same direction in the atom. 119. Some press mold need the steel having the different direction in the atom, but some press mold want the steel having the same direction in the atom, because of the different condition. 120. SKD11,SKD61(SLD is used on the plastic mold side. NAK55, NAK80, NAK101 have different performance in the pose. 121. The heat steel has a bit lower hardness than the cool steel which can reach the top performance of the material. 122. SKH9 is highspeed steel which is often used as mill tool and also is used as the high difficult plastic mold. 123. The manufacturing of plastic gear often demands 5 times discharge. In Japan there are two standard on the gear, JIS (Japanese International Standard) and JGMA (Japanese Gear Manufacture Association). Some factory has the capacity of machining 45 degree lean gear or module with 1420 gear num by using CHARMILLER or ARGI. When the gear is finished, it need be measured by the special machine, such as OSAKA’s gear measure machine. 124. Generally, we can machine 2 grade gear, but it is hard for us to machine 34 grade gear. 125. A Japanese plant designing and machining a gear mold need about 25 days. 126. To new mold, the part need be check once per two hours during the trial mold, however, the producing mold normally was checked once per four hours. 127. If the gear is unqualified, we can check it by using the gear measure machine which can print the gear curve with measuring, and analyze the results, then adjust the gate size corresponding the unreasonable position. 128. Generally the plastic runner material can be used three to five times after broken into pieces by a machine. Except the plastic material including glass, the other plastic material can be mixed into the new material directly. 129. To WEDM, the gap of rough electronic discharge is about , however to finish machining, the gap is or so. 130. To WEDM, the corner of radius, the point of wire entering the workpiece or outing the workpiece is very easily to occur some error, so leading to the quality of surface isn’t very good. 131. To Charmill WEDM machining, the maximum machining height is about 180mm. 132. To a general WEDM machining, the average capacity of machining is about 120160mm2, that is the rough machining is about 80mm2, the semifinish machining and finish is rapider. 133. Because the flow is difficult, the runner of PMMA (polymethyl methacrylate) is set circle shape. 134. The removing gap slot of plastic mold often set around the pruduct of Coreamp。 Cavity. The depth of begin is , the length is about 1。