To ensure the airtight seal between the movable partition and the track, it is necessary to approach from four aspects: material selection, structural design, installation process, and detail handling Focusing on the track and partition top, bottom, and side seams and other key areas for refined construction. The following are specific methods and operational points:

1. Top Seal: Light leakage/sound insulation treatment of the top of the track and partition

1.  Track groove sealing design

• Embedded track groove : A "U-shaped" or "recessed" groove is created at the bottom of the track. After the top of the partition is inserted into the groove, a 5-8mm gap is left on both sides of the groove, filled with elastic sealing strip (such as EPDM rubber strip), achieving sealing through compression of the strip.
  • Example : The strip height should be 2-3mm higher than the groove depth to ensure that the strip is compressed and fits against the inner wall of the track after the partition is installed.
• External track sealing : If the track is externally mounted (such as surface-mounted track), install L-shaped metal pressure plate at the top edge of the partition, and paste self-adhesive sound insulation sealing strip (thickness 3-5mm) between the pressure plate and the bottom of the track, and tighten the sealing strip by fixing the pressure plate with screws.

2.  Top expansion joint sealing

• When there is a discrepancy between the partition height and the installation space (such as inconsistent floor height), a 10-15mm expansion joint is reserved between the top of the partition and the ceiling, using adjustable sealing device ：
  • installation Spring-type sealing pressure plate : One end of the pressure plate is fixed to the top of the partition, and the other end presses against the ceiling via a spring. The spring force should be ≥5kg to ensure long-term compression and sealing.
  • Joint filling fire-resistant sound insulation cotton (such as rock wool), and the outside is sealed with silicone sealant The width of the sealant joint is 8-10mm.

2. Bottom Seal: Dust/sound insulation treatment of the bottom of the floor track and partition

1.  Floor track groove sealing

• The floor track needs to be designed with inverted trapezoidal groove . After the bottom of the partition is inserted into the groove, install elastic sweep strip (PVC material or rubber material) on both sides. The bottom of the sweep strip is in close contact with the ground, and the height is adjustable (adjustable range 5-10mm).
• Installation points : The sweep strip is fixed to the bottom of the partition with metal clips. The length of each sweep strip is ≤1.5 meters, and the joints overlap by 50mm to avoid gaps.

2.  Lifting sealing device

• For high-requirement sound insulation scenarios (such as meeting rooms, banquet halls), use electric lifting sealing system ：
  • A hidden cylinder or electric push rod is installed at the bottom of the partition. When activated, the push rod pushes the rubber sealing seat downward, close to the ground (pressure ≥10kg), forming a seal; when closed, the sealing seat retracts.
  • The edge of the sealing seat should be beveled at a 45° angle to reduce friction resistance, and anti-slip rubber pad is pasted on the bottom surface to prevent slipping.

3. Side Seal: Treatment of the joints between partition panels

1.  Concave-convex groove splicing + sealing strip

• The sides of adjacent partition panels are processed with convex tenon and recess (depth/width ≥20mm). When assembling, paste return-shaped sealing strip (such as butyl rubber strip) in the recess, and the tenon is inserted, and the strip is compressed to fill the gap.
• Strip selection : Closed-cell foam strips with self-adhesive layers are preferred, with a density ≥30kg/m³ and a compression rebound rate ≥80% to ensure long-term sealing effect.

2.  Metal pressure strip + sealant

• For glass or lightweight partition panels, the joints between panels are covered with stainless steel pressure strip The silicone weather-resistant sealant (such as neutral transparent glue) is embedded between the pressure strip and the panel. Before applying the glue, use acetone to clean the gap to ensure firm bonding.
• The glue joint should be continuous and full, and the surface should be concave round processing (Depth 1-2mm), avoiding dust accumulation and ensuring aesthetics.

IV. Material Selection and Installation Process Key Points

1.  Sealing Material Performance Requirements

2.  Installation Error Control

• The installation gap between the partition and the track should be ≤2mm. If it exceeds, it needs to be adjusted through shims or milling the edge of the board correction to avoid sealing failure due to excessive gaps.
• The planarity error of adjacent partition plates should be ≤1.5mm. It can be checked with a straight edge. If it exceeds the standard, adjust it through the leveling screws (spacing ≤600mm) fine-tuning.

V. Completion Test and Hidden Trouble Inspection

1.  Airtightness Test Methods

• Visual Inspection : In a dark room, use a strong flashlight to illuminate the seams and observe whether there are any light leaks (light leak length ≤5mm/meter seam is qualified).
• Smoke Test : Release smoke (such as a smoke bomb) on one side of the partition, and use test paper on the other side to detect whether smoke penetrates, focusing on the track interface and plate splicing seams.
• Sound Insulation Test : Use a sound level meter to measure the noise difference between the two sides. The qualified value should be ≥ the design requirement (e.g., office ≥35dB, meeting room ≥45dB).

2.  Common Problem Solving

Summary

The airtightness of the movable partition is the core guarantee for sound insulation, dust prevention, and fire prevention. The key lies in precise control of installation gaps, selection of suitable sealing materials, and ensuring that the sealing components are evenly stressed . It is recommended to plan the sealing scheme in advance during the design phase (such as track groove type, sealing component installation position). During installation, follow the process of "pre-installation adjustment, then fixed sealing", and make a record of hidden parts (such as rubber strip model, pressure strip screw position) for later maintenance and replacement.