Slotter Head Movable Block for Accurate Gluing Margin Formation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing slotter heads face challenges in accurately forming a gluing margin piece in corrugated board sheets due to uneven contact with the lower blade, particularly when adjusting the distance between the slotter head and the lower blade, leading to inaccuracies in cutting and forming the joining piece.
Innovation Solution
A slotter head design featuring a disk-shaped cutter rest with a movable block and rotatable first and second support shafts, allowing the first cutting blade to rotate in intersecting directions for precise contact with the lower blade, and a biasing member to maintain the blade's position, ensuring accurate cutting and forming of the joining piece.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the second knife is fixed to the outer peripheral portion of the slotter head so as to be inclined in the circumferential direction, then the gluing margin piece can be formed with the required shape, but the cutting portion of the second knife partially contacts and does not evenly contact the outer peripheral surface of the lower blade, making formation of the gluing margin piece difficult
Solution Approach 1:
The patent makes the second knife rotatable around the first shaft center along the rotation shaft center direction, transforming it from a fixed static component to a dynamic one. This rotation capability allows the knife to adapt its contact point with the lower blade during operation, ensuring even contact across the cutting surface while maintaining the required inclined shape for gluing margin piece formation.
Solution Approach 2:
The patent introduces a movable block that separates the support function (provided by the cutter rest and support shafts) from the cutting function (provided by the second knife). This segmentation allows the knife to be mounted on a movable carrier that can rotate independently, enabling the knife to maintain its inclined shape while achieving even contact with the lower blade through rotational movement.
2Adaptability or versatility
If the distance between the slotter head and the lower blade is adjusted according to the type of corrugated board sheet, then different sheet thicknesses can be processed, but the cutting portion of the joint cutter and the outer peripheral surface of the lower blade will be positionally displaced from each other
Solution Approach 1:
The patent introduces rotational degrees of freedom to the cutting assembly through the first and second support shafts. When the distance between the slotter head and lower blade is adjusted for different sheet types, the second knife can rotate around the first shaft center to realign its cutting portion with the outer peripheral surface of the lower blade, maintaining positional accuracy despite changes in inter-blade distance.
3Adaptability or versatility
If the cutting blade is elastically supported, then the blade can accommodate distance adjustments, but the cutting blade will be shaken in any direction and may obliquely contact the outer peripheral surface of the lower blade, making it difficult to form the gluing margin piece with high accuracy
Solution Approach 1:
Instead of elastic support that allows random movement, the patent uses rotational support shafts that constrain motion to specific rotational degrees of freedom. The second knife can rotate around the first shaft center and the movable block can rotate around the second shaft center, providing adaptability for distance adjustments while preventing chaotic shaking and oblique contact through controlled rotational movement only.
Solution Approach 2:
The patent applies different types of support to different parts of the cutting assembly. The second knife is rotatably supported by the first support shaft at a fixed location on the cutter rest, while the movable block is rotatably supported by the second support shaft. This localized rotational support provides the necessary flexibility for distance adjustment while maintaining cutting accuracy through constrained rotational movement.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A slotter head, a slotter apparatus, and a box making machine form a joining piece with a high degree of accuracy by each being provided with: a cutter rest (101); a movable block (103) mounted in an outer peripheral portion of the cutter rest (101); a first cutting blade (104) that is fixed to the movable block (103) along a shaft direction and along a direction inclined in a circumferential direction by a predetermined angle (θ); a first support shaft (106) that supports, on the cutter rest (101), the movable block (103) rotatably around a first shaft center (O1) along the shaft direction; and a second support shaft (107) that supports, on the cutter rest (101), the movable block (103) rotatably around a second shaft center (02) along the circumferential direction.