Fruit Press Circular-Sector Recess Design for Larger Nut Diameters
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Solution Overview
Problem
Existing fruit presses are limited in accommodating larger nuts due to fixed diameters of pressing recesses and rollers, requiring larger presses or complex adjustments, which increase design effort and handling difficulties.
Innovation Solution
The pressing recesses have a central cross-section in the form of a circular sector with a rounded apex, and pressing punches follow this shape, allowing larger nuts to be accommodated without enlarging the rollers, with adapted pressing rams for optimal juicing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the diameter of pressing rollers is increased to accommodate larger nuts, then the maximum nominal diameter of pressable nuts is increased, but the overall size of the fruit press must be increased
Solution Approach 1:
The pressing recesses transition from hemispherical shape to circular sector shape with rounded apex, fundamentally changing the geometric dimensioning. This allows the circumferential length of cross-sections to increase without increasing the roller diameter, enabling larger nuts to be pressed while maintaining the same press size.
Solution Approach 2:
The invention changes the geometric parameters of the pressing recesses from spherical coordinates (radius, polar angle, azimuthal angle) to a circular sector configuration defined by radii and arc lengths. This parameter transformation allows independent optimization of pressing surface area from roller diameter.
2Adaptability or versatility
If two pressing units with different diameters are provided to accommodate larger diameter range, then the diameter range of pressable nuts is increased, but the design complexity and number of components increase
Solution Approach 1:
A single pressing roller design with circular sector recesses serves multiple functions: it can press nuts of various diameters from small to large within a continuous range, replacing the need for multiple specialized pressing units. The universal design eliminates the requirement for sorting devices and complex changeover mechanisms.
3Area of moving object
If the shape of pressing recesses is changed from hemispherical to circular sector with rounded apex, then the circumferential length of cross-sections is increased, but the manufacturing complexity of the rollers increases
Solution Approach 1:
The circular sector shape with rounded apex utilizes continuous curved surfaces that can be generated by standardized manufacturing processes such as CNC machining or roller forming. The geometry maintains rotational symmetry around the roller axis, simplifying toolpath generation and tool selection compared to arbitrary complex shapes.
Data Source
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AI summary
A fruit press for nuts is described with two pressing rollers (2) arranged on either side of a knife (8), which can be driven in opposite directions and form pressing recesses (6) distributed over the circumference, and with two punch heads (3) provided below the pressing rollers (2), which can be driven in opposite directions to the pressing rollers (2), which carry pressing punches (7) distributed over the circumference and interacting with the pressing recesses (6) of the pressing rollers (2).In order to achieve an adaptation to larger nominal diameters of the nuts, it is proposed that the pressing recesses (6) have a central cross-section in the form of a circular sector with a rounded apex region (11) between the two radials (12) delimiting the circular sector in a central plane (10) perpendicular to the axis of rotation of their pressing roller (2), and that the pressing punches (7) of the punch heads (3) have a contour following the central cross-section of the pressing recesses (6) at a distance in a projection parallel to the axis of rotation of the punch heads (3).