Blow Molding Station Base Part Movement Mechanism
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Solution Overview
Problem
Existing blow molding devices face challenges in achieving a compact construction while allowing for efficient and precise removal of blow-molded containers from the mold, as traditional designs often result in positive-locking connections that complicate the removal process and lead to increased process time and mechanical complexity.
Innovation Solution
The design features a stationary mold support and a swiveling mold support, with the base part capable of movement in both longitudinal and perpendicular directions, allowing for a compact arrangement and precise control of container removal through cam-controlled movements and a mechanically robust coupling with a drive shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a stationary mold support and swiveling mold support configuration is used, then compact construction is achieved, but the base part cannot perform customary lifting movements due to positive-locking connections
Solution Approach 1:
The base part is designed with dynamic movement capabilities, allowing it to perform both lifting movements and lateral displacement relative to the mold supports. This dynamic configuration enables the base part to break free from the positive-locking connection during operation, resolving the contradiction between compact construction and movement capability by making the system adaptable during the molding cycle.
Solution Approach 2:
The movement of the base part is segmented into two independent components: lifting movement (vertical direction) and lateral displacement (horizontal direction). This segmentation allows each movement type to be optimized independently, enabling compact construction while maintaining full movement capability through coordinated execution of discrete motion segments.
2Manufacturing precision
If the base part is mechanically coupled with the moving mold support, then container removal precision is improved, but device complexity increases
Solution Approach 1:
The mechanical coupling mechanism between the base part and moving mold support serves multiple functions simultaneously: it provides precise positioning for container removal, transmits cam-controlled movements, and maintains structural stability. This multi-functionality reduces the need for separate mechanisms, thereby limiting the increase in device complexity while achieving high precision.
3Measurement precision
If cam-controlled movements are used for the base part, then movement precision is improved, but process time increases due to additional control mechanisms
Solution Approach 1:
The cam mechanism is designed to pre-establish the precise movement path of the base part, so that positioning and movement control are prepared in advance during mold closure. This preliminary action ensures that when container removal is needed, the base part can quickly execute the predetermined motion sequence, minimizing additional process time while maintaining high precision.
Data Source
AI summary
The invention relates to a device for blow molding containers. The temperature of parisons, which are made of a thermoplastic material, is adjusted and the parisons are then molded in a blow mold under the effect of a pressurized medium to give containers. The blow mold which is composed of at least two blow mold segments is held in place by mold supports of a blow molding station (3) that is arranged on a supporting structure (41). A bottom part (7) is used in addition to the blow mold segments. Both the mold supports and the bottom part are arranged in such a way that they can be mechanically positioned. The mold supports and the bottom part are mechanically coupled to each other. One of the mold supports (19) is immobile and the other mold support is swiveled to the supporting structure. The bottom part has a trajectory relative to the mold support which has a component that extends in the longitudinal direction of the blow molding station and a component that extends at a right angle to the longitudinal direction.