When the table tennis racket sponge is produced with natural rubber as the main raw material, the cost of raw materials and production cost can be effectively reduced on the premise of ensuring the product quality by mixing the appropriate proportion of latex reclaimed rubber. The processing process of table tennis racket sponge mainly includes raw rubber plastic refining, mixing, hot refining, material, vulcanization, slicing, packaging, etc. What problems should be paid attention to when using natural rubber/latex recycled rubber and rubber to produce table tennis racket sponge?
1. Key points of mixing process of natural rubber/latex reclaimed rubber
During plasticizing, the latex reclaimed rubber and natural rubber shall be fully plasticized respectively. During mixing, the sequence of mixing and feeding shall be strict: antioxidant → accelerator → foaming agent → filler → softener → sulfur; The mixing shall be uniform as far as possible, and the plasticity of the rubber mixture shall be above 0.6; When mixing natural rubber/latex reclaimed rubber, foaming agent and softener can be made into paste first and then added to further disperse the foaming agent evenly.
2. Key points of sponge hot refining and cutting in the production of table tennis racket with natural rubber/latex recycled rubber
The rubber mixture is first rough refined and turned evenly, and then refined to drive out the air to smooth the lower sheet; The thickness of the lower sheet shall be greater than the thickness of the mold frame, and it shall be cut into a rubber strip of a certain width; Then cut and weigh the rubber strip according to the mold size.
3. Key points of vulcanization process of natural rubber/latex reclaimed rubber
The sponge sponge of table tennis racket is vulcanized by a die plate vulcanizer. The die is composed of a die frame and upper and lower cover plates. The die frame can also be inlaid with the lower or upper cover plates.
When using natural rubber/latex reclaimed rubber and rubber to produce table tennis sponge rubber, one time foaming vulcanization method or two times foaming vulcanization method can be adopted. The volume of rubber 2ELYY113 for one foaming vulcanization should be smaller than the volume of the transverse cavity, and a foaming space should be reserved. Generally, the amount of glue loaded depends on the apparent density of the sponge. If the apparent density is large, the amount of glue loaded will be large, and vice versa; The secondary foaming vulcanization method is to foam and shape in the first vulcanization, and conduct supplementary foaming and vulcanization in the second vulcanization. The rubber filling amount shall be subject to filling the sulfur mold.
4. Key points of sponge parking and slicing for table tennis racket production with natural rubber/latex recycled rubber
The sponge after vulcanization shall be placed to shrink. Generally, it will be parked naturally, and the contraction time will take more than one month; If forced shrinkage is carried out by boiling or heating, the shrinkage time can be shortened. The sponge after parking shall be sliced according to the thickness required for use.
The sponge rubber of table tennis racket is suitable for natural rubber. Proper use of latex reclaimed rubber can not only reduce the cost, but also improve the rubber processing technology, such as reducing the vulcanization reaction, improving the rubber fluidity, etc. Later, the small editor will continue to share with you the formula design and processing points for the production of rubber parts of table tennis racket with reclaimed rubber.
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