PVC corner profile production line (Single screw extruder)

Product General Information:

Commercial Terms of Products:

Description:

The PVC building corner bead machine (also known as PVC external corner bead/internal corner bead forming machine or PVC corner bead extrusion production line) is a plastic extrusion equipment specifically designed for the continuous production of PVC corner bead profiles used in architectural decoration. This equipment is widely applied to the protection and beautification of indoor and outdoor walls, columns, door and window openings, and other areas prone to impact. The products exhibit multiple functions such as anti-collision, anti-cracking, edge finishing, and decoration.

Basic composition of equipment

A complete set of PVC corner bead machine usually includes the following core modules:

Module Function Description

1. Raw Material Drying and Feeding System: PVC agranules need to be dried at 80–100℃ for 2–4 hours to prevent moisture from causing bubbles; automatic vacuum feeding, with a compounding machine (which can add calcium carbonate, titanium dioxide, stabilizers, CPE impact modifiers, etc.).

2. Conical twin-screw extruder: Common models of the main machine include SJ65/25. It ensures uniform plasticization, low shear heat, and prevents material decomposition.

3. Special profile molds: Customized according to the type of corner protector:

• Corner protector for external corners (90° external corners, with grid/glossy back panel)

• Internal corner protector (edge finishing for internal corners)

• Arc corner guards (R-corners, used in children's rooms, hospitals)

The mold material is typically 3Cr13 or H13 steel, with a chrome plating on the surface for anti-sticking.

4. Vacuum sizing table + spray cooling water tank: Multi-stage vacuum adsorption + water cooling ensures stable profile dimensions and no deformation; the cooling length is 3–6 meters, accommodating different wall thicknesses (1.0–2.5mm).

5. Haul-offs: Tracked or combined tracked and rubber roller traction, with a speed range of 0.5–5 m/min, equipped with encoder feedback to ensure uniform speed.

6. The PVC corner bead online punching machine is an automated device integrated into the PVC corner bead extrusion production line. It is used to simultaneously perform precise punching during the continuous extrusion, shaping, and traction of corner beads, eliminating the need for machine downtime or secondary processing. This technology is widely applied to building corner protection products that require enhanced bonding strength or special functionalities (such as breathability, wire threading, and hanging accessories), especially for composite corner beads with fiberglass mesh backing.

7. Cutting and Stacking System: Utilizing flying knife cutting or saw blade cutting, the length can be set (such as 2.4m, 2.7m, 3.0m), with automatic counting and stacking.

Specifications: 

Competitive Advantage:

Core competitive advantage

1. High cost-effectiveness and low investment threshold

Price of the entire production line equipment is significantly lower than that of aluminum profile or stainless steel corner protector production lines;

Low raw material cost.

The daily production capacity can reach 1.5–3 tons, with a short payback period (usually 6–12 months).

2. Adapt to prefabricated decoration and renovation needs

Corner bead is a crucial auxiliary material for "wall leveling + finishing", and is indispensable in quick-installation systems such as gypsum board partitions, cement boards, and calcium silicate boards;

In the renovation of old houses, it is used to cover issues such as wall cracks and uneven internal and external corners, offering convenient construction.

3. The trend of product functional integration is evident

The new type of corner bead is integrated with fiberglass mesh backing, enhancing the bonding strength with putty/mortar;

Some high-end products adopt co-extrusion technology, with a surface layer made of ASA or PMMA for weather resistance, suitable for exterior walls (such as balconies and window frames);

Antibacterial masterbatch (such as silver ions) can be added for use in public spaces like hospitals and schools.

4. Improvement in environmental compliance

Using calcium-zinc stabilizers as a substitute for lead salts complies with RoHS, REACH, and domestic green building materials standards;

No VOC emissions (hard PVC processing temperature ≤190℃, low decomposition risk).

5. Strong flexible production capacity

By replacing molds, it is possible to produce various profiled materials such as skirting boards, trim strips, T-bars, and window sill boards on the same production line, thereby enhancing equipment utilization.