Bag Stacking Cassette with Clamping Mechanism for Straight Edges
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Solution Overview
Problem
Existing methods for stacking plastic film bags result in bags with hanging holes or positioning holes, making it difficult to produce stacked packages with straight edges, which cannot be automatically packed by robots, and are inefficient in terms of production time and cost.
Innovation Solution
A device with a cassette holder that clamps bags firmly in place using a means for clamping with a width smaller than the bag, eliminating the need for hanging holes and allowing for straight-edged stacking, integrated with a traction system using toothed belts for efficient stacking and automated handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If bags are stacked using conventional methods with positioning holes, then bags can be stacked, but the edges are not straight and additional holes are required in each bag
Solution Approach 1:
The invention divides the stacking function into separate components: a conveyor belt for transport and a独立的 clamping device for positioning. The clamping device is segmented into multiple clamps that can independently position each bag, eliminating the need for positioning holes in the bags themselves and achieving straight edges through external mechanical constraint.
Solution Approach 2:
The invention introduces a clamping device as an intermediary between the conveyor belt and the bags. This clamping device acts as a mediator that holds the bags in precise positions during stacking, transferring the positioning function from the bag structure itself to an external device, thereby achieving straight edges without modifying the bags.
2Extent of automation
If bags are freely placed on conveyor belts, then handling is simple, but automated packing is not possible and edges are not straight
Solution Approach 1:
The invention applies preliminary action by clamping and positioning the bags on the conveyor belt before the stacking operation occurs. The clamping device secures each bag in its correct position in advance, ensuring that when the bags are stacked, they maintain straight edges and proper alignment, enabling subsequent automated packing without additional positioning steps.
3Productivity
If stacking pins are used to stack bags, then bags can be collected, but hanging holes or positioning holes are created in the bags
Solution Approach 1:
The invention extracts the positioning function from the bag structure itself and relocates it to an external clamping device. Instead of creating holes in the bags to accommodate positioning pins, the clamping device externally constrains the bags using clamps that grip the outer surfaces, thereby eliminating the harmful effect of holes in the bags while maintaining stacking efficiency.
Solution Approach 2:
The invention applies local quality by using clamps that contact only specific localized areas on the outer surfaces of the bags. The clamping force is concentrated at these local contact points, providing effective positioning and stacking without requiring any modifications to the overall bag structure, thus avoiding the creation of holes while maintaining productivity.
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
Enables the production of straight-edged stacked packages without hanging holes, allowing for automated removal and packing, increasing production output and reducing costs by eliminating the need for additional production steps and enabling the stacking of various types of bags.
Implementation Method 1
The device consists of a stacking section of endless traction elements running over deflection wheels or rollers and intermittently driven. These traction elements are equipped with pairs of upright stacking pins
Implementation Method 2
the cassette tray having at least one means for clamping the placed bags
Data Source
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AI summary
The invention relates to a device (1) for the stacking of bags (7) made of plastic film in packets, wherein the device (1) has at least one traction means, preferably one or two toothed belts (2, 2a, 2b). According to the invention, the device (1) has at least one cassette storage element (6), onto which the bags (7) can be placed flatly on top of one another and which can be fastened to the traction means, and the cassette storage element (6) has at least one means for clamping the placed bags (7). The invention further relates to a method for stacking bags (7) made of plastic film in packets for a device (1), wherein the device (1) has at least one traction element, preferably one or two toothed belts (2, 2a, 2b).