Design of Demoulding Structure for Combination of Lifter and Push Block

Time：2023-03-07 16:24:30 / Popularity： / Source：

【Abstract】There are many buckles or cylinder posts in automobile plastic parts. Such plastic parts generally have small space. During demoulding process after injection molding, lifter will interfere with other buckle or bone positions of plastic part. Demolding structure combined with lifter and push block can solve such problems.

1 Introduction

There is a sloping top block at corresponding injection-molded buckle or cylinder column of automobile buckle plastic part. A lifter block is rovided with a molding groove for forming a buckle or a cylinder column, lifter block and plastic part are slidably connected; a push block is provided at clamp step corresponding to injection molding plastic part, push block is embedded in clamp step for molding clamp step, push block and plastic part are slidably connected. In this case, sliding connection between lifter block and push block and plastic part is used, so that lifter block and push block are demolded together with plastic part and injection mold body, thereby solving problem of lifter interfering with other buckle positions or bone positions of plastic part, making demoulding of plastic part convenient and improving injection molding efficiency.

2 Analysis of demolding structure of combination of lifter and push block

Plastic part shown in Figure 1 needs to be demolded with a lifter, but space is small and lifter travel is insufficient.
Lifter is a common core-pulling structure form of injection molds. It is used to solve demoulding of outer or inner side of plastic part to be formed. In order to meet requirements of plastic parts upside down and demoulding in this case, demolding structure design of combination of lifter and push block is required to make plastic parts upside down and demoulded.
Now take demolding structure design of combination of lifter and push block for forming plastic part as an example to illustrate structural design. By slidingly connecting lifter and push block to plastic part, a complete mold is formed. Lifter block forms buckle or cylinder column on plastic part, push block forms clip and bone position on plastic part. Unique sliding connection feature enables lifter block and push block to be demolded together with plastic part and mold body, thereby solving problem that lifter will interfere with other buckle positions or bone positions of plastic part.

Figure 1 Limitations of plastic part structure

3 Motion analysis of demolding structure combined with lifter and push block

Demoulding structure of combination of lifter and the push block is shown in Figure 2. Plastic part is provided with a sloping top block at cylinder column corresponding to its injection molded plastic part, lifter block is used to demould cylinder column; there is a push block at position of plastic part's clamp, and push block is used to demold stuck position of plastic part. Lifter is combined with push block, lifter and push block are ejected simultaneously, because push block gives space to lifter, so that lifter will not interfere with plastic parts. After a certain distance is ejected, plastic part is released from movable mold. Sloping top is detached from cylinder column and buckled upside down, and push block has been pressed against plastic part card-shaped bone position.
To sum up, demolding structure of combination of lifter and push block in this case forms a complete mold by slidingly connecting lifter block and push block to plastic part, so that cylinder column on plastic part is formed on lifter block, and card step bone position on plastic part is formed at push block. Lifter block and push block are combined together, so that lifter block and push block are demolded together with plastic parts, thereby solving problem that lifter will interfere with other buckle positions or bone positions of plastic parts, making demoulding convenient and improving injection molding efficiency.

Figure 2 Demoulding structure of combination of lifter and push block

4 Conclusion

Molding of plastic part requires combination of lifter and push block to be demolded. Demolding structure of combination of lifter and push block can put this kind of special design concept into reality, realize this kind of structure, and diversify design of automobile plastic parts.

Gud Mould Industry Co., Ltd