Paper Cup Machine Bottom Rolling Defect Fix

Document 3：Paper Cup Machine Bottom Rolling Defect Fix | Cup Bottom Wrinkling & Folding Adjustment Guide

May 27, 2026

Brand: Shunda | Manufacturer: Haining Chengda Machinery Co., Ltd.

Document Keywords: paper cup bottom rolling fault, cup bottom wrinkling fix, cup bottom edge folding solution, bottom rolling die adjustment

Meta Description: Professional fault adjustment guide for Shunda paper cup machine bottom rolling process, solving cup bottom outward folding, upper wrinkling, middle seam steps and end wrinkling problems.

Cup bottom rolling quality directly determines the sealing performance and compression resistance of paper cups. Common defects such as bottom edge folding, surface wrinkling and middle seam steps are mostly caused by unreasonable bottom rolling die size, angle and height position. This guide summarizes targeted adjustment methods for all bottom rolling faults of Shunda paper cup machines, helping factories quickly eliminate defective products and stabilize production quality.

3. Bottom Rolling Forming Faults and Commissioning Standards

1. Outward folding of paper at the cup bottom end: The fault cause is oversized diameter of the bottom rolling die. Adjust the die diameter parameters or replace with a matched die to fit the paper cup specification and eliminate bottom outward folding.

2. Wrinkling at the upper cup bottom: The fault cause is undersized matching size or insufficient bending angle of the bottom rolling die. Adjust the die size and bending angle accordingly to ensure smooth bending and forming of the bottom paper without extrusion wrinkling.

3. Obvious step at the end of the cup bottom middle seam: Fine-tune the bottom rolling die downward to correct the forming butt gap, make the bottom seam fit tightly, and remove step marks.

4. Wrinkling at the cup bottom end: Fine-tune the bottom rolling die upward to optimize the compaction effect of bottom forming, balance the stress of the bottom paper, and solve end wrinkling failure.