3results about How to "Small dimensional tolerance" patented technology

The invention discloses a mold and a method for injection molding of a spout of a thermos flask. The mold comprises an upper mold core assembly and a lower mold core assembly which can be loaded on a mold frame, the upper die core assembly comprises an upper die core which forms an upper convex die on a die closing surface; the lower die core assembly comprises a lower die core forming a lower male die on the die closing face and three side die mechanisms arranged on the peripheral side of the lower male die. During die assembly, the three side die mechanisms can be mutually and laterally spliced and are matched with the lower male die and the upper male die to form a die cavity; the upper mold core is provided with a first core pulling mechanism which can extend into the mold cavity to form the lower clamping groove; the lower male die is provided with a second core-pulling mechanism capable of extending into the die cavity to form an upper clamping groove and a third core-pulling mechanism capable of forming a matching groove. During mold closing, a complete mold cavity can be formed, a core pulling mechanism is matched to synchronously stretch into the mold cavity to form a key structure, one-time injection molding of a spout is achieved, defects are reduced, and therefore the product quality is improved.

This utility model discloses a valve sleeve integrated hot nozzle, relating to the field of hot runner technology. It includes a hot nozzle body with a hot runner channel inside. The hot runner channel has a main flow channel, a primary flow channel, and secondary flow channels connected sequentially. The main flow channel is arranged along the central axis of the hot nozzle body. Multiple secondary flow channels are arranged in a ring around the central axis of the hot nozzle body. Multiple primary flow channels are arranged, each corresponding to one of the secondary flow channels, and flow obliquely or branching from the main flow channel to guide and divert molten plastic in the main flow channel to the secondary flow channels. Each secondary flow channel is equipped with a valve control assembly, which includes a valve needle and a valve sleeve. The valve needle is movably inserted into the valve sleeve, and the opening and closing of the discharge hole at the bottom of the secondary flow channel is controlled by the axial sliding of the valve needle relative to the valve sleeve. This helps to reduce the dimensional tolerances of multi-cavity injection molded parts.

The utility model discloses an anti-short circuit structure and a relay. The anti-short-circuit structure comprises a switch and a pushing unit. The switch comprises a movable contact piece and a static contact piece; the pushing unit comprises a pushing body and a first elastic piece; the pushing body is driven by a driving part with an in-place locking function or driven by a transmission mechanism with a mechanical self-locking function so as to push at least one movable contact piece to be connected or disconnected with the static contact piece; the first elastic piece is arranged corresponding to the closing direction of the movable contact piece and is arranged between the pushing body and the movable contact piece so as to provide contact pressure for closing the static contact piece to the movable contact piece when the movable contact piece and the static contact piece are closed; the pushing body is provided with a first limiting part, and the first limiting part is arranged corresponding to the closing direction of the movable contact piece and makes contact with or gets close to the movable contact piece in the closing direction of the movable contact piece when the movable contact piece and the static contact piece are closed. The relay adopts the anti-short-circuit structure. The anti-short circuit structure provides a configuration different from that in the prior art.