Demoulding mechanism of staggered-teeth snap ring plastic part forming mold and demoulding method of demoulding mechanism
A demolding mechanism and molding die technology are applied in the field of injection molding of plastic parts to achieve the effects of simplifying the structure of the die, rationally setting parts and reducing the manufacturing cost.
Inactive Publication Date: 2020-08-25
宁波正佳模塑有限公司
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Problems solved by technology
[0003] At present, in the field of injection molding, there is no complete set of mold demoulding mechanism to efficiently complete the demoulding of the wrong-tooth snap ring. Therefore, a demoulding mechanism for the plastic parts of the wrong-tooth snap ring is urgently needed.
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[0025] Aiming at the difficulties in forming plastic parts of wrong-tooth snap rings, such as figure 2 As shown, for the opening of the first difficult gating system, due to the assembly requirements on the inner wall, the assembly effect cannot be affected by the existence of gate marks, and the side core-pulling mechanism needs to be installed on the outer wall due to the existence of 24 locking teeth. The gate is not easy to open, so the opening of the gate can only be set on the upper end surface, and it can only be poured in the form of a point gate; and the plastic part is a thin-walled ring-shaped plastic part, combined with the size of the plastic part, a single casting It is very difficult to ensure the mold filling performance of the plastic part. Therefore, two point gates G1 and G2 are set on the top surface of the plastic part for pouring. For the second problem, the demoulding of the 24 clamping teeth involves the demoulding of the ring-shaped side features, the...
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The invention relates to a demoulding mechanism of a staggered-teeth snap ring plastic part forming mold. The demoulding mechanism comprises inclined-top sliding block sub-mechanisms, an inclined-topsliding block push-out sub-mechanism and a mold core seesaw plate push-out sub-mechanism. Each inclined-top sliding block sub-mechanism comprises an inclined-top sliding block, a sliding block guide block and a sliding block insert. The sliding block guide blocks are fastened into grooves formed in a movable mold plate through screws and are provided with T-shaped ribs; the T-shaped ribs are in sliding fit with T-shaped grooves formed in the inclined-top sliding blocks and used for upward inclined movement guiding of the inclined-top sliding blocks; by means of pushing out of a push-out plate,four push rods are pushed synchronously to push a top pushing ring, demoulding of 24 snap teeth of the side surface is finished through the 12 inclined-top sliding blocks, meanwhile the seesaw platetype mechanism is driven to synchronously push out a formed mold core of a plastic part, the first-time pushing out and side-surface demoulding actions of the plastic part are finished, then the push-out plate continues performing pushing-out, the seesaw plate type mechanism is driven to completely push out the plastic part, and thus automatic demoulding is achieved.
Description
technical field [0001] The invention relates to the field of injection molding of plastic parts, in particular to a demoulding mechanism and a demoulding method for a plastic part forming mold of a staggered tooth clasp. Background technique [0002] Figure 1a , Figure 1b Shown is a new adjustable seat lifter for an ambulance with a wrong tooth snap ring, and the parts are molded by ABS plastic injection molding. The main body of the staggered snap ring is an outer diameter of The conical ring has a total height of 8mm and an average wall thickness of 2mm; the inner wall is a smooth cone, and the outer wall is provided with 24 teeth on the wall of the cone, and the teeth have two types of different sizes , one is 3mm in width, 1mm in single-layer thickness and has three layers of teeth, which are respectively Figure 1a 01~12 features shown in . One is a single layer of teeth 01'~12' with a width of 2mm and a thickness of 1mm. The single three-layer latches and single...
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Login to View More IPC IPC(8): B29C45/44B29C45/40B29C45/26
CPCB29C45/2602B29C45/4005B29C45/44
Inventor 华明伟
Owner 宁波正佳模塑有限公司