Applications of Dispensing Adhesive within a curved screen Middle Frame

 Adhesive dispensing for curved screen Middle frames is a crucial and typical application scenario in precision manufacturing. It’s primarily used in electronic devices with curved screens, such as smartphones, smartwatches, tablets, and some high-end televisions.

1.Why Adhesive Dispensing? (Purpose and Importance)

The combination of a curved screen and its frame cannot be as simple as fixing it with clips or screws as with traditional flat structures. Adhesive dispensing technology has become the optimal solution, and its main purposes include:

 

● Structural Bonding: This is the most basic function. High-strength adhesive is used to firmly bond the screen to the metal or plastic frame, ensuring the integrity and durability of the device’s structure.

● Dust and Water Resistance: By forming a continuous and uniform sealant line at the joint between the screen and the frame, dust and moisture are effectively prevented from entering the device. This is a key process for achieving the device’s IP67/IP68 protection rating.

● Cushioning and Shock Absorption: The adhesive layer itself has a certain degree of elasticity and energy absorption capacity, which can act as a buffer when the device is dropped or subjected to impact, protecting the brittle curved screen from shattering.

● Stress Dispersion: Curved screens inherently possess internal stress, and the device is also subjected to external stress during

Second Intelligent In-line Automated Glue Dispensing Machine SEC-DH400L adopts an integrated mineral casting design, with ultra-high precision and super stability, powerful expansion capabilities, and can realize ion cleaning, dispensing, detection, UV exposure and other functions;

Adopting a gantry structure, it can bear large loads, stable structure, and a powerful CCD visual positioning system, which can meet the requirements of Mark point positioning, edge positioning, and 3D scanning positioning; strong scalability, and can expand AOI detection 3D detection, UV exposure curing and other functions;

Strong platform compatibility, contact and non-contact dispensing, single-head and multi-head synchronous dispensing, automatic compensation and adjustment of double-head spacing, five-axis dispensing function based on needle A/R displacement, etc.

 

2.Specific application stages of dispensing

In the entire manufacturing process of curved screen equipment, adhesive dispensing equipment is mainly applied in the following stages:

Key Materials:

● Adhesive Types:

UV Curing Adhesive: Fast curing speed; initial fixation is achieved within seconds of UV irradiation, facilitating subsequent operations. However, there may be issues with uncured areas in shaded regions.

4.Industry Trends and Challenges

● Trends:

Fully automated: The automatic glue dispenser machine dispensing process is integrated with loading/unloading, cleaning, bonding, and curing processes to form a fully automated production line.

Summary:

Applying adhesive to the mid-frame of curved screens is a technology-intensive core process in modern consumer electronics manufacturing. It’s not merely “applying glue,” but a high-end application integrating precision mechanics, automated control, machine vision, and new materials science. The maturity of this technology directly determines the reliability, waterproofing, and production yield of curved screen equipment, making it a key area of ​​research and competition for major mobile phone manufacturers and automation equipment suppliers.

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