How To Choose Tin Box Lid And Bottom

The Cover And Bottom Structure Of Tin Cans Are Rich And Varied, And Can Be Divided Into Many Types According To Different Classification Standards. For Example, According To The Number Of Layers, It Can Be Divided Into Single-Layer Cover And Double-Layer Cover; According To The Shape Of The Cover Surface, It Can Be Divided Into Flat Cover And Arc Cover; According To The Bottom Forming Method, It Can Be Divided Into One-Time Forming Bottom And Three-Piece Body Bottom, Etc. These Structural Forms Have Their Own Characteristics And Are Suitable For Different Usage Scenarios And Design Requirements.

However, In Actual Applications, Iron Box Covers Are Usually Divided Into Two Main Structures: Outer Roll Cover And Inner Roll Cover. There Is No Absolute Difference Between These Two Structures, And They Are More Based On Personal Preferences And Specific Usage Needs. The Following Is A Detailed Description Of These Two Cover Structures:

1. Outer Roll Cover

The Outer Roll Cover Is A Common Iron Box Cover Structure, Which Is Characterized By The Roll Edge Located On The Outside Of The Cover. This Design Makes The Cover More Prominent Visually, Giving People A Simple And Atmospheric Feeling. The Sealing Effect Of The Outer Roll Cover Is Usually More Reliable, And It Can Well Protect The Contents Of The Can From The Influence Of The External Environment. Because Of Its Relatively Simple Structure And Relatively Low Production Cost, It Has Been Widely Used In The Market.

2. Inner Roll Cover

Unlike The Outer Roll Cover, The Inner Roll Cover Has Its Curling Edge On The Inner Side Of The Cover. This Design Makes The Cover Look More Refined And More Integrated. The Sealing Performance Of The Inner Roll Cover Is Usually Better Than That Of The Outer Roll Cover Because It Fits The Can Body Better And Reduces The Penetration Of Air And Moisture. In Addition, The Inner Roll Cover Is Safer During Use, And The Curling Edge Will Not Directly Contact External Objects, Thereby Reducing The Risk Of Damage. However, The Production Process Of The Inner Roll Cover Is Relatively Complex, And The Cost Is Slightly Higher Than That Of The Outer Roll Cover.

In Addition To The Structure Of The Cover, The Bottom Structure Of The Tin Can Is Also Varied, And The Following Three Are Common:

1. Button Bottom

The Button Bottom Is A Simple And Common Bottom Structure. It Is Characterized By No Obvious Steps At The Bottom, But The Inner Curling Edge Can Be Seen. The Sealing Effect Of This Structure Is Relatively Weak, But Due To Its Low Production Cost And Simple Process, It Has Been Widely Used In Some Products That Do Not Require High Sealing. For Example, Some Small Gift Boxes Or Promotional Packaging Often Use Button Bottoms.

2. Cover Bottom

The Structure Of The Cover Bottom Is Relatively Complex, And There Are Obvious Steps At The Bottom. This Design Allows The Bottom To Fit The Can Body Better, And The Sealing Performance Is Significantly Better Than The Buckle Bottom. Another Advantage Of The Covered Bottom Is That It Has A More Refined Appearance And A Stronger Overall Feel. This Bottom Structure Is Often Used For Products With High Requirements For Sealing And Appearance, Such As Food Cans, Cosmetic Cans, Etc. Although Its Production Cost Is Slightly Higher Than The Buckle Bottom, Its Performance And Aesthetics Make It Popular In The Market.

3. One-Time Molding Bottom

One-Time Molding Bottom Is A More Advanced Bottom Structure. The Can Body And The Can Bottom Are Molded At One Time During The Production Process, And No Edges Or Steps Can Be Seen At The Bottom. The Biggest Advantage Of This Structure Is That It Has Excellent Sealing Performance, Which Can Effectively Prevent The Penetration Of Air And Moisture And Extend The Shelf Life Of The Product. In Addition, The Appearance Of The One-Time Molding Bottom Is Very Smooth, With A Strong Overall Sense, Giving People A High-End And Exquisite Feeling. This Structure Is Often Used In Small Iron Boxes, But Due To Its Complex Production Process, The Height Is Usually Not Too High, Otherwise It Will Affect The Molding Effect And Cost Control.

Considerations For Selecting The Bottom Cover Structure

When Choosing The Bottom Cover Structure Of The Tin Can, The Following Factors Need To Be Considered Comprehensively:

• Usage Scenario: Different Usage Scenarios Have Different Requirements For The Bottom Cover Structure. For Example, Food Cans Require Higher Sealing, While Gift Boxes Focus More On The Appearance Of The Appearance.

• Cost Budget: Different Cover Bottom Structures Have Different Production Process Complexities And Costs. For Example, The Production Cost Of A One-Time Molding Bottom Is Higher And Suitable For High-End Products; While The Buckle Bottom Is Lower And Suitable For Ordinary Products.

• Product Characteristics: The Shape, Size And Weight Of The Product Will Also Affect The Choice Of Cover Bottom Structure. For Example, A Small Iron Box Is More Suitable For A On