Insertion Stamp for Dual Label Injection Molding
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Solution Overview
Problem
The existing insertion stamp process for inserting banderole and base labels into an injection mold is time-consuming, leading to low performance in injection molding systems.
Innovation Solution
The insertion stamp features a compact design with a movable inner die relative to an outer die, allowing both labels to be inserted in a single stroke using vacuum bores and a spring-loaded mechanism for efficient transfer, ensuring the base label overlaps the banderole label to prevent plastic escape during injection molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single insertion stamp with two separate holding parts is used to insert banderole and base labels, then both labels can be inserted, but the process requires multiple strokes (moving in, retracting, shifting, moving in again) which is time-consuming
Solution Approach 1:
The patent combines two separate holding parts into a single integrated insertion stamp structure. The first holding part for the banderole label and the second holding part for the base label are merged into one stamp body, allowing both labels to be inserted in a single stroke into the injection mold, eliminating the need for multiple strokes and repositioning operations.
Solution Approach 2:
The patent positions the two holding parts in different spatial dimensions within the single insertion stamp - the first holding part is arranged laterally adjacent to the second holding part. This dimensional arrangement allows both labels to be transferred to the injection mold simultaneously in one stroke, resolving the time-consuming sequential insertion problem.
2Productivity
If the insertion stamp is designed with two separate holding parts for banderole and base labels, then both labels can be held, but the structure becomes more complex and requires multiple movement steps
Solution Approach 1:
The patent merges the functionality of two separate insertion stamps into a single integrated stamp structure. The first holding part and second holding part are combined in one stamp body with a unified actuation mechanism, reducing device complexity while maintaining the capability to insert both labels simultaneously.
Solution Approach 2:
The single insertion stamp is designed with multi-functionality, serving both to hold and insert the banderole label (via the first holding part) and the base label (via the second holding part) in one operation. This universal design eliminates the need for separate stamps or multiple insertion operations.
3Manufacturing precision
If labels are inserted in separate strokes with retraction and shifting, then each label can be placed precisely, but the overall process time increases significantly
Solution Approach 1:
The patent combines the precision placement mechanisms for both labels into a single synchronized operation. The first holding part and second holding part are both actuated simultaneously in one stroke, maintaining precise placement accuracy for both labels while reducing the total insertion time from multiple strokes to a single stroke.
Solution Approach 2:
The patent prepares both labels for insertion in advance by holding them in position on the insertion stamp before the insertion stroke begins. The banderole label is held on the first holding part and the base label on the second holding part, both ready for simultaneous transfer to the injection mold in one precise motion.
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
This design significantly reduces the time required for label insertion, enhancing the efficiency of the injection molding process while ensuring that plastic is contained within the container, resulting in higher production rates without plastic leakage.
Implementation Method 1
The outer die (1) is provided with means, preferably vacuum bores, for holding the banderole label in place
Implementation Method 2
The inner die (7) is provided with means, preferably at least one sucker, with which the base label is held in place
Data Source
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AI summary
Plastic containers are known whose side walls and bottoms are at least partially formed by a band label and a bottom label, to which the respective plastic is injection-molded. To enable the band label (39) and the bottom label (42) to be inserted into the injection mold quickly, the insertion punch (4) has an outer punch (1) and an inner punch (7) that is movable relative to the outer punch (1). The band label (39) can be held by the outer punch (1), and the bottom label (42) by the inner punch (7). Both labels (39, 42) can be inserted into the injection mold in a single stroke of the insertion punch (4). This allows for a time-saving transfer of the two labels (39, 42) to the injection mold, thus increasing the throughput of the injection molding system.