Thermoforming Plastic Drawer Frame with Vacuum Shaping
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Solution Overview
Problem
Existing methods for producing drawer frames are limited to materials like wood and metal, lacking versatility in design and surface options, particularly in terms of color, motif, and structure.
Innovation Solution
A method involving thermoforming of a plastic plate, where the plate is heated and deformed into the shape of a drawer frame using vacuum pressure, allowing for various surface adaptations and material choices like ABS, PMMA, and PC, with pre-stretching to ensure even application and reduced wall thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional materials like wood or metal are used for drawer frames, then structural strength is ensured, but design versatility and surface options are limited
Solution Approach 1:
The patent applies parameter changes by transforming the plastic material from its initial flat state through controlled heating to achieve elastic deformability, then using vacuum pressure to reshape it into the three-dimensional drawer frame structure. This parameter transformation enables a single material to achieve both design versatility and structural integrity
Solution Approach 2:
The patent utilizes phase transitions by heating the plastic plate to transition it from a rigid state to an elastically deformable state, allowing it to be shaped into the drawer frame. The subsequent cooling phase then stabilizes the new shape, achieving both design flexibility and structural stability
2Adaptability or versatility
If a plastic plate is heated and drawn into a mold using vacuum, then design flexibility and surface options are improved, but manufacturing precision may be compromised
Solution Approach 1:
The patent applies preliminary action by pre-stretching the heated plastic plate in a direction opposite to the mold before drawing it into the mold. This pre-stretching ensures that the plastic sheet is applied and stretched particularly evenly during the forming process, maintaining manufacturing precision while achieving design flexibility
Solution Approach 2:
The patent applies local quality by using two heat radiators located opposite one another to heat correspondingly opposite sides of the plate uniformly. This localized controlled heating prevents stresses from arising in the plate, ensuring even deformation and maintaining shape accuracy throughout the forming process
3Manufacturing precision
If the plastic sheet is pre-stretched before drawing into the mold, then even application and reduced wall thickness are achieved, but the process complexity increases
Solution Approach 1:
The patent merges multiple operations into a single integrated thermoforming process. The heating, pre-stretching, vacuum drawing, and cooling steps are combined in one continuous process flow, achieving wall thickness uniformity without significantly increasing overall process complexity
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 stable, durable, and design-friendly drawer frames with diverse color and structural options at lower costs, expanding manufacturing possibilities beyond traditional materials.
Implementation Method 1
the plastic sheet is heated with a heat radiator. In particular, two heat radiators located opposite one another are used, which heat correspondingly opposite sides of the plate
Implementation Method 2
the plastic plate is heated to the point where it can be deformed and then drawn into a shape by means of a vacuum, which corresponds to the shape of the frame
Implementation Method 3
the plastic sheet is pre-stretched in a direction opposite to the mold before it is drawn into the mold by applying compressed air
Implementation Method 4
after the plastic sheet has been drawn into the mold, the formed sheet is cooled. After cooling, the formed panel, now in the shape of the chime, can be removed from the mold
Data Source
Figure 1a~1e
AI summary
A method for manufacturing a drawer frame (10) is proposed, which laterally limits the storage space in a drawer. According to the invention, a plastic sheet (2) is deformed until it becomes malleable and then drawn into a mold (1) corresponding to the shape of the frame by means of a vacuum.