Shuangji Machinery Factory (Jilin 132102) Yang Huiping Weinan Special Pump Industry Co., Ltd. is irregular, uneven thickness, the thickest part is 10mm, the thinnest part is only 2mm. The length of the rod is only 16mm, it is difficult to clamp during machining. And the trimming process after die forging is also difficult. If the bar material is processed, not only the mechanical properties are not good, but also a large amount of metal raw materials are wasted, and the production cycle is long, and mass production cannot be formed. Therefore, the die forging is used as the machined blank, and the outer dimension of the rod does not need to be machined, and the rod size of the die forging can ensure the size of the part of the part, and the precision can also meet the production requirements. At this point, only the two "wings" of the part can be machined.
In order to get the right blank, the author designed a special set of molds to create conditions for mass production.
The mold is designed according to the conventional idea, and the mold is as shown.
However, considering the difficulty of machining and cutting the edge, the author designed the forging as a symmetrical structure in which two parts are joined together. When the forging is cut from the middle, two parts can be obtained. The mold drawing is as shown...
The cavity is shallow and the upper and lower cavity pairs are shaped as shown.
Practice has proved that the adoption of the mold effectively solves the problems of machining and improves productivity. (20020916) In the process of producing CQF series fluoroplastic magnetic drive pump, the impeller and inner magnetic rotor of several main parts must be all-inclusive of plastic, its quality is good or bad, and the whole magnetic drive pump is used. Life expectancy is significant. To this end we have designed a plastic press mold as shown.
4. Supporting screw 6. Inner magnetic insert 8. The mold sleeve wipes the mold with alcohol and the assembly is completed in a sintering box.
The temperature is raised to the plastic sintering temperature.
At a constant temperature of about lh, the upper die 7 is pressed into the mandrel sleeve 8 and pressed to the mold clamping position.
Turn the mold over and quickly remove the backing plate 1 and the support screws 4 (see a) and place the screw plugs 5 (as shown by b).
The lower mold 3 is flattened to the lower mold 2. After cooling for several hours, the mold can be released and the pressed product can be taken out.
1, the support screw 4 should be rapid, otherwise the pressure products will appear in layers, and even cracking and scrapping.
The size of the inch should be determined according to the diameter D and the number of the support screws 4, that is, (a) the support pin (b) the nXDX/z3 (which indicates the number of the support screws 4).
This method is convenient and reliable in production. (20020908)
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