Rotary Sealing and Cutting Device for Pillow Packaging
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Solution Overview
Problem
Existing end-sealing devices for pillow-type packaging machines face challenges with high manufacturing precision requirements and generate impact loads due to horizontal reciprocating motion, making them difficult to process and assemble effectively.
Innovation Solution
A rotary sealing and cutting device with upper and lower mechanisms featuring a rotating shaft, sealing and cutting assembly, guide wheels, and a D-ring groove structure that allows for high-speed sealing and cutting, reducing impact and load by using a rotary motion and prolonging sealing time for effective heat-sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-cutter reciprocating sealing device is used, then sealing and cutting can be achieved, but high manufacturing precision is required which is not easy to implement
Solution Approach 1:
The device is divided into upper and lower sealing assemblies, each with independent cutters and sealers. This segmentation allows each component to be manufactured separately with standard precision, then assembled together, reducing the overall manufacturing precision requirement compared to a single integrated reciprocating device
Solution Approach 2:
The device transitions from horizontal reciprocating motion to vertical rotary motion. The rotary mechanism with guide wheels in D-ring grooves provides dynamic adjustment and smoother operation, reducing impact loads and allowing for easier manufacturing while maintaining sealing precision
2Force
If horizontal reciprocating motion is used, then sealing and cutting can be performed, but large impact load is generated
Solution Approach 1:
The device replaces horizontal reciprocating motion with vertical rotary motion. The rotary mechanism with guide wheels engaging in D-ring grooves provides continuous, smooth motion without sudden impacts, while the vertical motion direction allows gravity to assist the sealing process
Solution Approach 2:
The D-ring grooves provide curved guidance paths for the guide wheels, enabling smooth transitional motion during the sealing cycle. This curved geometry eliminates sharp corners and sudden changes in direction that would generate impact loads, while maintaining efficient sealing contact
3Force
If complex structures are added to eliminate impact and balance load, then impact can be reduced, but difficulty of processing and assembly increases
Solution Approach 1:
The D-ring grooves provide curved guidance paths that naturally eliminate impact through smooth transitional motion. This curved geometry is simpler to manufacture than complex balancing mechanisms, as it uses standard groove shapes that can be milled or formed in the guide plates
Solution Approach 2:
The vertical rotary motion with guide wheels in D-ring grooves provides dynamic load distribution throughout the rotation cycle. The continuous contact and smooth motion naturally balance loads without requiring additional counterweights or complex balancing mechanisms
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The rotary device achieves high-speed sealing and cutting with reduced impact and load, ensuring air-tightness and improving manufacturing efficiency by eliminating the need for complex balancing structures, while maintaining precision and reducing noise and cost.
Implementation Method 1
The guide wheel is provided on the guide wheel base; the upper guide plate and the lower guide plate are respectively provided with a D-ring groove; linear groove sections of the upper and lower D-ring grooves are adjacent and parallel
Implementation Method 2
The driving mechanism may include an elastic member and a pressing member; the elastic member may be provided between the cutter and the cutter holder and may drive the cutter to retract
Implementation Method 3
the pressing member may be connected to the rotating shaft; the pressing member has a pressing arc surface; the pressing member is configured to act on the acting member by the pressing arc surface to drive the cutter to extend
Implementation Method 4
The upper and lower sealing sealers are pressed together to realize sealing
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present disclosure relates to a rotary sealing and cutting device capable of high-speed sealing and cutting. The rotary sealing and cutting device includes a frame and upper and lower sealing and cutting mechanisms. The sealing and cutting mechanism includes a rotating shaft, a rotating base and a sealing and cutting assembly. The rotating base is connected to the rotating shaft. The rotating shaft is in transmission connection with a power source that drives the rotating shaft to rotate. The sealing and cutting assembly includes a sealer, a cutter holder, a sliding block, a guide wheel base and guide wheels. The frame is provided thereon with an upper guide plate and a lower guide plate. The rotary sealing and cutting device adopts the upper and lower sealing and cutting mechanisms with a rotary structure, which avoids the impact and load caused by the horizontal reciprocating motion in the prior art. In addition, the rotary sealing and cutting device is provided with a D-ring groove to make the sealer move along a D-shaped track, which prolongs the sealing time to achieve the best high-speed heat-sealing effect of the packaging film, thereby meeting the air tightness requirement for sealing.