A method of connecting hollow elongate members 12 which may be window frame members. The method comprising locating a plastics material insert 16 extending outwardly for a short distance from each hollow member 12, heating the inserts, and bringing the hollow members together such that the heated inserts 16 fuse together to connect the hollow members 12.

Provided is a frame forming structure for use with a frame and a sash of an aluminium-wood combined door/window. The door/window may include at least a door/window frame or a door/window sash frame. The door/window frame or the door/window sash frame is formed by two connecting adjacent profile frame strips by means of an angle forming device and a round tenon rod on adjacent connecting end surfaces. Symmetric U-shaped notches for positioning the angle forming device and symmetric round tenon rod holes are processed on the connecting end surfaces of the two adjacent profile frame strips. A round tenon is used for positioning and inserted into the symmetric round tenon rod holes. A assembly-type the angle forming device is fixed the two adjacent profile frame strips. The disclosure has characteristics of increasing connecting strength of an angle portion and sealing performance after angle formation, improving convenience of frame formation.

Provided is a frame forming structure for use with a frame and a sash of an aluminium-wood combined door/window. The door/window may include at least a door/window frame or a door/window sash frame. The door/window frame or the door/window sash frame is formed by two connecting adjacent profile frame strips by means of an angle forming device and a round tenon rod on adjacent connecting end surfaces. Symmetric U-shaped notches for positioning the angle forming device and symmetric round tenon rod holes are processed on the connecting end surfaces of the two adjacent profile frame strips. A round tenon rod is used for positioning and inserted into the symmetric round tenon rod holes. A assembly-type the angle forming device is fixed the two adjacent profile frame strips. The disclosure has characteristics of increasing connecting strength of an angle portion and sealing performance after angle formation, improving convenience of frame formation.

A connector is adapted for securing into a fixed position two frame members that are positioned to define a common miter joint and aligned slots to collectively define a single correspondingly-shaped connector opening. The connector includes a peripheral configuration corresponding to a peripheral configuration of the correspondingly-shaped opening. The connector may have a peripheral surface having on predetermined portions thereof a plurality of stepwise ridges adapted to contact with reduced friction only spaced-apart areas of sidewalls of the correspondingly-shaped opening. The connector may have at least one void in the connector to permit deformation sufficient to accommodate variations between the shape of the connector and the shape of the correspondingly-shaped opening. A method of using the connector is also disclosed.

Disclosed are a frame assembly structure of a wooden doors and windows and a corner assembly method. The window includes, at least, a window frame or a casement window frame mainly formed by joining adjacent profile frame strips via a corner assembler on adjacent connecting end surfaces. The connecting end surfaces of two adjacent profile frame strips are respectively configured to be cross sections of 0 to 180. A positioning notch of the corner assembler is at least provided on the cross sections. Two half corner assemblers of the corner assemblers are respectively embedded and fixed into the positioning notches on the adjacent cross sections. The two half corner assemblers are connected by an intermediate fastening piece and a fastening bolt to form a complete corner assembler, and the two adjacent profile frame strips are connected tightly and fixedly. The frame assembly structure is easy to assemble.

Disclosed are a frame assembly structure of a wooden doors and windows and a corner assembly method. The window includes, at least, a window frame or a casement window frame mainly formed by joining adjacent profile frame strips via a corner assembler on adjacent connecting end surfaces. The connecting end surfaces of two adjacent profile frame strips are respectively configured to be cross sections of 0 to 180. A positioning notch of the corner assembler is at least provided on the cross sections. Two half corner assemblers of the corner assemblers are respectively embedded and fixed into the positioning notches on the adjacent cross sections. The two half corner assemblers are connected by an intermediate fastening piece and a fastening bolt to form a complete corner assembler, and the two adjacent profile frame strips are connected tightly and fixedly. The frame assembly structure is easy to assemble.