Due to the strict SOP cardboard manufacturing process, UCPACK has experienced tremendous growth over the years. Today, UCPACK is proud to have a full facility to produce from raw spiral tube into finished printed tubes, along with tin airtight capped food packaging tubes. With over 50 experienced workers, we have broaden our production capabilities and production lines, increasing 1,000,000pcs/month Into 1,500,000pcs/month.

UCPACK, custom cardboard tube, process, Slitter Machine

Slitter Machine

UCPACK, custom cardboard tube, process, Winding Belt

Winding Belt

UCPACK, custom cardboard tube, process, Cutting


Winding Process

From paper into cores

Paper tubes are usually composed of cardboard or kraft paper. Once paper slit from one big roll into about several small rolls, they are belted together with glues on to be diameter we need. They are put on a winding machine, wrapped around a metal bar known as the mandrel. This step is known as winding. Paper tubes are rolled over the mandrel where they acquire their cylindrical shape. The belt in the winding machine pulls the paper rolls and ends a spirally wound paper tube. The entire process is automated and requires minimal human supervision and control. This makes it an efficient process for manufacturing paper tubes.

UCPACK, custom cardboard tube, process, One Piece Gluing

One Piece Gluing

UCPACK, custom cardboard tube, process, cutting into lid and base

Cutting into Lid & Base

UCPACK, custom cardboard tube, process, lid bottom, seal gluing

Lid Bottom Seal Gluing

Mounting Process

From core to printed tube

After tubes are cut into the sizes required. we will proceed with mounting paper onto the cores. First, we will glue the body of the tube, making it wrapped around with printed paper. After gluing finished, we do a second cutting, making a sure outlay of boxes we will stack cardboard tubes up, wrapped around, and kept them in air-condition room. Making sure all glues dried before we proceed with rolling. If glue is not dried, the rolling edge will be easily broken.

UCPACK, custom cardboard tube, process, rolling edge

Rolling Edge

UCPACK, custom cardboard tube, process, gluing lid, base

Gluing Lid and Base

UCPACK, custom cardboard tube, process, slotting


Rolling and Slotting

Putting lid and base together

In this line, we will roll the edge, glue, and then seal the bottom and lid with two pieces of 350gsm printed round pads. Sometimes, the pad has a ribbon adhered to. When all lid and base are sealed, we proceed with inner tubes slotted into, then combine three pieces into one complete tube, clean and dry. Finally packed into shipping cartons.

UCPACK, custom cardboard tube, process, rolling, slotting

Flat Edge

A bit different from Rolled Edge

The flat edge is different from the rolled edge. One assembling line with two sides, each side has a clear standard mission and assignment. Two workers seal bottom and lid’s pads, two workers wrap printed papers on the pads, two workers pressing against the pads and fix strongly, one worker slots inner tubes, one combine lid and base and clean, and one inline checking quality, one or two workers finally pack out into shipping cartons. Flat Edge has to be finished in one assembling line while rolled edge can be separated.

UCPACK, custom cardboard tube, process, flat edge

Tinplate Cap

Tinplate or aluminum cap installed

Before we install a cap on the tubes, we need to make a mold to test that both one-piece tube and tinplate can be combined seamlessly. Our semi-automatic tinplate cap install machine full feeding speed is 15000pcs/per day. Usually, we install the aluminum cap and deliver the tin bottoms in separate shipping cartons. You need to have a simply-handed machine to seal the bottom at your end after fulfillment. Up until now, we have experiences with a lot of offshore clients with main two options below:

  • Tin/Aluminum caps and extra a plastic cover, client seal with the bottoms we offer
  • Tin sealed at the bottoms, but with flat/rolled edge lid

Start Your Packaging Journey with UCPACK