Innovative Display Panel Assembly with PVC Foam Board Insulation

Electronic gas price signs incorporate an advanced mounting system where digits are first securely fastened to PVC foam boards (also known as Sintra or expanded PVC sheets) before being installed into the metal enclosure. This critical design step creates a protective insulating layer that prevents direct contact between electronic components and the steel cabinet. The 5-8mm thick high-density PVC foam board serves multiple functions: it acts as a non-conductive barrier to eliminate short-circuit risks, provides vibration dampening to protect solder joints during transport, and allows precision alignment of digits through pre-drilled mounting holes. The moisture-resistant polymer material additionally prevents condensation-related corrosion, while its lightweight yet rigid structure simplifies both initial installation and future maintenance. This assembly method has proven 40% more reliable in humidity tests compared to direct-metal-mount competitors, while maintaining superior heat dissipation through strategically placed ventilation channels between the foam board and enclosure.

DATA SHEET

FAQ

1. Why use PVC foam board instead of direct metal mounting?
A: The PVC foam board serves as a critical insulating layer that:
• Prevents electrical short circuits by separating digits from the metal enclosure
• Reduces vibration transfer by 60% compared to direct mounting
• Eliminates condensation-related corrosion with its moisture-resistant properties

2. How does this design improve installation efficiency?
A: The pre-assembled PVC panel system enables:
• 50% faster digit alignment with pre-drilled mounting holes
• Tool-less installation with snap-in components
• Single-person operation for most maintenance tasks

3. What durability advantages does this assembly provide?
A: Field tests show:
• 40% fewer solder joint failures in high-vibration environments
• 100% prevention of metal-to-digit arcing incidents
• -40°C to +80°C stable operation due to thermal insulation

Installation Manual: PVC Foam Board Mounting System

Step 1: Prepare the PVC Foam Board

Select black PVC foam board (recommended thickness: 5-8mm)

Verify board dimensions match the interior of your metal enclosure

Step 2: Precision Cutting Process

CNC-cut digit cavities according to:
a) Display digit dimensions (allow 0.5mm clearance per side)
b) Pre-aligned mounting holes matching your enclosure

Deburr all cut edges for smooth digit insertion

Step 3: Digit Installation

Insert digits through front of pre-cut PVC panel

Secure each digit using:

Anti-vibration gaskets (included)

Locking tabs or M4 stainless screws (tool-less options available)

Confirm flush mounting with straightedge

Step 4: Enclosure Assembly

Position loaded PVC panel into enclosure

Align with pre-cut mounting holes

Fasten using:

4 corner brackets (weatherproof models)

Quarter-turn latches for tool-less access

Final inspection:

Verify 2mm minimum clearance between digits and metal surfaces

Check all retaining clips are engaged