Multilayer Container Pre-cutting Device with Dual-Blade Segmentation
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Solution Overview
Problem
Current pre-cutting devices fail to effectively mark precut lines on both the upper and lower layers of multilayer plastic containers, leading to defects in the breaking and separation process in the food industry, particularly with containers having more than three layers.
Innovation Solution
A container pre-cutting device with a die plate and a punch holder plate featuring upper and lower blades made of high mechanical strength material, such as metal carbide, to simultaneously create precut lines on opposite faces of the multilayer material, ensuring correct breaking and separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single upper blade is used to make precut lines, then the device complexity is low, but the manufacturing precision is insufficient for multilayer materials
Solution Approach 1:
The cutting tool is segmented into two independent blades: an upper blade mounted on the punch holder plate and a lower blade mounted on the die plate. This segmentation allows each blade to independently create precut lines on opposite faces of the container, ensuring sufficient depth penetration through multilayer materials while maintaining a relatively simple overall device structure.
Solution Approach 2:
The precutting operation transitions from a single-dimensional (single-face) approach to a two-dimensional (dual-face) approach by introducing a lower blade that operates from the opposite side of the container. This dimensional change ensures that precut lines are created on both the upper and lower faces of the multilayer material, solving the depth penetration problem.
2Reliability
If traditional single-layer precutting is used, then the ease of manufacture is high, but the reliability of breaking and separation is poor for multilayer containers
Solution Approach 1:
The cutting tool is segmented into two independent blades: an upper blade mounted on the punch holder plate and a lower blade mounted on the die plate. This segmentation allows each blade to independently create precut lines on opposite faces of the container, ensuring sufficient depth penetration through multilayer materials while maintaining a relatively simple overall device structure.
Solution Approach 2:
Different blades are positioned at different locations (upper and lower faces) to create precut lines at specific local regions of the multilayer material. This local quality approach ensures that the precut lines are created at the precise depth and location needed for reliable breaking and separation of containers from the pack.
3Duration of action of moving object
If blades made of soft material are used, then the ease of manufacture is high, but the duration of action of the blades is short
Solution Approach 1:
The material parameter of the blades is changed from soft materials to hard materials such as metal carbide. This parameter change significantly increases the duration of action of the blade edges, allowing them to maintain sharpness and effectiveness throughout the entire production process without frequent replacement or re Sharpening.
Data Source
Figure 1~2
AI summary
The invention relates to a container pre-cutting device; comprising a die plate (1) and a punch holder plate (2) provided with upper blades (3) for making an upper precut line (51) in the multilayer material (5) of the containers positioned on the die plate (1); in which the die plate (1) incorporates, in a position in opposition to the upper blades (3), lower blades (4), such that while bringing the punch holder plate (2) closer to the die plate (1) the upper blades (3) and the lower blades (4) define on opposite faces of the multilayer material (5) of the containers an upper precut line (51) and a lower precut line (52).