Composite Container Molding Die with Split-Mold Segments
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Solution Overview
Problem
Conventional methods for manufacturing composite containers with a paper label face challenges in arranging the preform within the blow molding die, leading to increased labor, costs, and reduced rigidity due to the need for larger die installation areas and low-height paper cylinders.
Innovation Solution
A composite container manufacturing method using a molding die with a closed, cylindrical lower mold and an upper mold composed of split-mold segments, where the paper label is arranged in the lower mold and the preform is positioned between the split-mold segments, allowing for blow molding and assembly in a direction that intersects the lower mold axis, thereby simplifying the process and maintaining container body rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the preform is moved in the lateral direction to the blow molding die, then the container body can be formed, but it is impossible to arrange the preform inside the paper cylinder in the die
Solution Approach 1:
The patent changes the arrangement direction from lateral (horizontal) to vertical (along the mold axis). The preform is moved in the mold axis direction from the mold opening side to the paper cylinder, and then the mold closes in the same direction. This dimensional change allows the preform to be properly positioned inside the paper cylinder while maintaining ease of manufacture.
2Ease of operation
If a low-height paper cylinder is used to avoid interfering with the preform, then the preform can be moved, but the height of the paper cylinder is low overall, so the effect of supplementing container body rigidity fades
Solution Approach 1:
By changing the preform movement direction to vertical (along the mold axis) and closing the mold in the same direction, the patent enables the use of full-height paper cylinders. The preform is positioned inside the paper cylinder before mold closure, allowing the paper cylinder to extend to its full height and effectively supplement container body rigidity.
3Ease of operation
If the blow molding die is widely opened in the lateral direction to move the preform from above, then the preform can be arranged, but the installation area of the die required to open the mold must be larger, which makes the system larger
Solution Approach 1:
The patent changes the preform movement direction from lateral (horizontal) to vertical (along the mold axis). The preform is moved from the mold opening side in the direction of the mold axis, and the mold closes in the same direction. This eliminates the need for wide lateral opening, maintaining a compact die installation area equivalent to conventional designs.
4Ease of manufacture
If the container body is made thinner to protect the environment and reduce costs, then environmental protection and cost reduction are achieved, but the rigidity of the container body is reduced
Solution Approach 1:
The patent uses a composite structure combining a thin container body made of synthetic resin with a paper cylinder. The thin container body reduces material cost and environmental impact, while the paper cylinder supplements rigidity. The composite structure allows the container body to be made thinner while maintaining overall structural strength through the combination of materials.
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 method reduces labor and costs, maintains container body rigidity, and allows for a conventional-sized die installation area, enabling efficient production of composite containers with a paper label without the need for extensive die modifications.
Implementation Method 1
implement blow-molding on the preform by closing a molding die
Implementation Method 2
a paper label mounted to a trunk of the container body
Data Source
Figure 1
Figure 2
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AI summary
A manufacturing method of a composite container according to the present invention is characterized by preparing a paper label (3), and a preform (4); preparing a molding die (10) equipped with a closed, cylindrical lower mold (11), and an upper mold (12) composed of a plurality of split-mold segments (13, 14); next, in addition to arranging the paper label (3) in the lower mold (11), arrange the preform (4) from a direction that intersects an axis (A1) between the opened split-mold segments (13, 14), and thereafter move one or both of the lower mold (11) arranged with the paper label (3), and the upper mold (12) arranged with the preform (4) in a direction towards each other. After that, implement blow-molding on the preform (4) by closing a molding die (10), then opening the molding die (10) to release the composite container from the molding die (10).