Hollow Container Heating Unit Guide Rails for Stable Welding
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Solution Overview
Problem
Conventional hollow container manufacturing apparatuses face issues with the heating unit tilting or vibrating, leading to uneven heating and poor welding, especially for larger containers, due to their cantilever structure, which complicates positioning and reduces welding strength.
Innovation Solution
The apparatus incorporates guide rails integrated into the molding dies to stabilize the heating unit's movement, ensuring consistent distance and preventing vibration, along with holding mechanisms to secure workpieces and centering mechanisms to ensure even heating, and communication holes to manage thermal expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional injection molding machine is used to manufacture hollow containers, then the manufacturing process is simple, but the containers may contain weld lines that compromise structural integrity
Solution Approach 1:
The manufacturing process is divided into two separate stages: first forming a preform, then separately molding the final hollow container. This segmentation allows each stage to be optimized independently, eliminating weld lines while maintaining process simplicity through modular equipment design.
Solution Approach 2:
A preform is created as an intermediate step before final hollow container molding. This preliminary action prepares the material in an optimal shape that enables subsequent molding without weld lines, ensuring structural integrity while allowing the use of standard molding equipment.
2Reliability
If blow molding is used to manufacture hollow containers, then weld-free containers can be produced, but the process is time-consuming and labor-intensive
Solution Approach 1:
The process separates preform formation from final container molding into distinct stages, allowing automated injection molding of preforms followed by efficient blow molding. This segmentation eliminates the time-consuming manual operations of traditional blow molding while maintaining weld-free construction.
Solution Approach 2:
Traditional labor-intensive blow molding operations are replaced with automated injection molding machinery that can rapidly produce preforms and transfer them to blow molding equipment, significantly increasing productivity while maintaining structural integrity.
3Productivity
If injection molding is used to manufacture hollow containers, then production efficiency is high, but weld lines are created that reduce container strength
Solution Approach 1:
The manufacturing process is segmented into preform injection molding and subsequent blow molding stages. This allows the high-efficiency injection molding to create the preform, while the separate blow molding stage forms the final container without creating weld lines, thus maintaining both productivity and structural integrity.
4Device complexity
If traditional manufacturing methods are used, then equipment simplicity is maintained, but environmental pollution from manufacturing processes occurs
Solution Approach 1:
The manufacturing process uses parameter changes in material temperature and pressure during the two-stage molding process to achieve complete material utilization and eliminate waste, reducing environmental pollution while maintaining equipment simplicity through standard molding machinery.
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 configuration facilitates precise positioning of the heating unit, reduces uneven heating, and enhances welding strength by maintaining consistent heating and preventing workpiece displacement, thereby improving the manufacturing process.
Implementation Method 1
melted in an injection molding apparatus and injected into a mold
Implementation Method 2
heated and blown into a hollow container
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A hollow container manufacturing apparatus (100) includes: a fixed molding die (1) having a cavity (11); a movable molding die (2) having a cavity (21) and moved in a direction of coming closer to or away from the fixed molding die (1); a heating unit (3) to be placed between the fixed molding die (1) and movable molding die (2) to heat workpieces (w1, w2) in the fixed molding die (1) and movable molding die (2); guide rails (13) partly arranged in an opposing surface of the fixed molding die to oppose the movable molding die or in an opposing surface of the movable molding die to oppose the fixed molding die; and a drive mechanism (4) to move the heating unit (3) back and forth with respect to the fixed molding die (1) or movable molding die (2), along the guide rails (13), wherein the pair of workpieces (w1, w2) is heated by the heating unit (3) and then welded to each other.