C-Frame Beam Elastic Deformation for Die Platen Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In bar-less injection-moulding machines with vertically extensive die platens, distributing the clamping force effectively to prevent mould gaping is challenging, especially when the clamping force required for vertical adjustment is significantly higher than the clamping force, leading to structural complexity and potential collapse of the deformable joint.
Innovation Solution
The support of the beam on the die platen is achieved by two spaced support surfaces above and below the midplane, allowing the die platen to extend at a slight angle due to elastic deformation, thereby distributing the clamping force more evenly and preventing collapse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the clamping force is applied at a single point in the midplane of the die platen, then the joint part structure is simple, but the moment from vertically pronounced mould cavities cannot be effectively distributed
Solution Approach 1:
The single-point clamping force application is segmented into two support surfaces spaced apart vertically above and below the midplane. This segmentation distributes the moment from vertically pronounced mould cavities along the height of the die platen, preventing mould gaping while maintaining joint part simplicity.
Solution Approach 2:
The clamping force application transitions from a single-point (0D) or line (1D) contact to a distributed contact across two surfaces separated in the vertical dimension. This dimensional change allows the system to counteract moments from vertical mould features without increasing horizontal structural complexity.
2Manufacturing precision
If bars or pressure rods are added to move lower plate edges, then the parallel movement of die platen edges can be achieved, but the structural outlay and complexity increase considerably
Solution Approach 1:
The function of moving the lower plate edges parallel to the free sides of the C-frame is merged into the elastic deformation of the beam itself. The beam's natural flexing under clamping force simultaneously achieves both the parallel movement and the clamping action, eliminating the need for separate bars or pressure rods.
Solution Approach 2:
The beam performs self-service by using its own elastic deformation to achieve the required parallel movement of die platen edges. The beam's flexibility allows it to naturally accommodate the movement without requiring additional structural elements, making the system self-regulating.
3Reliability
If the deformable joint part is made sufficiently large to prevent collapse under high spring force, then the vertical adjustment function is reliable, but the clamping force is reduced by one order of magnitude
Solution Approach 1:
The system transitions from a static, oversized joint design to a dynamic, elastically deformable beam that adapts its shape under load. The beam's elastic deformation allows it to maintain structural integrity under high spring forces while preserving clamping force transmission, as the deformation is reversible and controlled by material properties rather than geometric oversizing.
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 ensures minimal deflection of the die platen and maintains the mould's vertical position under clamping force, reducing the need for additional structural elements and preventing mould gaping, while allowing for parallel movement of the die platens.
Implementation Method 1
a joint part is arranged between at least one die platen and the machine frame and comprises a beam extending in the longitudinal direction of the machine which is deformed upon application of the clamping force
Data Source
AI summary
An Injection moulding machine with substantially C-shaped machine frames including a joint part arranged between at least one die platen and the machine frame, the joint part comprising a beam extending in the longitudinal direction of the machine which is deformed upon application of a clamping force such that the at least one die platen is tilted relative to the associated side of the machine frame, the support of said beam effected substantially by at least two spaced support surfaces which are arranged above and below the midplane of the at least one die platen whose vertical position may be associated with the elastic deformation of the joint part by means of an adjustable abutment and extending the at least one die platen at an angle to the vertical.