2results about How to "Guaranteed molding size" patented technology

The utility model relates to the technical field of cargo booms, in particular to a cargo boom barrel and a crane, and the cargo boom barrel comprises a first half barrel, a second half barrel and a plug-in structure. Specifically, the first half cylinder body and the second half cylinder body are each of a thin-wall structure, the cross section of the first half cylinder body and the cross section of the second half cylinder body are each of an arch-shaped structure, notches are formed in the first half cylinder body and the second half cylinder body, and the notches of the first half cylinder body and the notches of the second half cylinder body are oppositely arranged and jointly spliced into the cargo boom cylinder body. The opposite insertion structure is arranged at the splicing position of the first half barrel and the second half barrel and suitable for enabling the notch of the first half barrel and the notch of the second half barrel to be oppositely inserted so as to adjust the relative position of the first half barrel and the second half barrel. According to the cargo boom barrel and the crane, the forming size of the cargo boom barrel can be guaranteed through fine adjustment of the size, so that the size of the manufactured cargo boom barrel is kept consistent.

The application discloses a forming die of a rubber guide sleeve with a metal framework and a preparation method thereof. The forming die comprises an upper die, a middle die and a lower die. The upper die comprises an upper disc and a cylinder. The cylinder is provided with a positioning hole. The lower surface of the upper disc is provided with a chamfered upper cavity groove. The lower die comprises a lower disc, a circular table and a positioning boss. The upper surface of the circular table is provided with a chamfered lower cavity groove. The middle die is provided with a cavity hole in the center. When the die is closed, the positioning boss of the lower die is inserted into the positioning hole. The positioning boss is provided with a support ring which is provided with a recess forming pin. The outer wall of the cylinder is provided with a metal framework. The chamfered upper cavity groove, the outer wall of the cylinder, the outer side wall of the support ring, the chamfered lower cavity groove and the inner wall of the cavity hole form a forming cavity. After vulcanization of the product is completed, the forming pin is accurately positioned, the square recess around the inner diameter of the metal framework guide sleeve meets the design requirements, the die opening and the product demolding are smooth, the operation is simple, safe and reliable, and the manufacturing cost is low.