(1) The structure of the handle parts
The parts of the handle include the face, core, base plate and square ring.
(2) Handle the production process
① Glue core: the core sample composite in the cardboard, with an awl along the edge of the sample in the cardboard to draw the outline of the core, and then cut with a knife according to the outline, each handle requires four layers of structure, layer and layer with adhesive overlap bonding, pressed on the press 10 ~ 15min to remove, and so the glue dry to be used.
②Take the cuttings to the core: first of all, the bottom plate skin piece cut to the required thickness, the size of 1.5 ~ 2mm, and then coated with adhesive on the surface of the core, the core will be taken on the edge of the bottom plate skin from 6mm.
After the core is built, use the scribe to cut the surface of the core round, there should be no traces of the knife, cut good with sandpaper to grind the surface smooth. After cutting the surface of the core, the two ends should be chamfered and operated as described before.
③ Glue the surface skin: first wipe water on the surface skin to make the skin soft, and then put the cuttings on a flat pad, the adhesive is applied to the core and the core outside the base plate skin, pay attention to the adhesive to be coated evenly. Then wipe the water to cover the skin on the core, so that the surrounding distance is equal, with the hand will put the skin snap firmly so that the skin surface close to the core, and finally the skin surface, the core edge within the scraping flat service, so that the core surface is rounded without wrinkles.
After the face skin glued to dry, the bottom of the skin will be folded inward, fold the curved part with a hammer to knock flat, and then coated with adhesive, adhesive do not apply to the folded edge, so as not to make the square circle is not easy to be loaded.
④Sewing the handle: After folding the bottom plate skin in pairs, sew the needle inside the core edge foot seam. The first stitch starts at 10~12mm from the end of the handle, and sew from one end to the other end with a stitch distance of 5~6 stitches every 25cm, and stop at 10~12mm from the end of the handle, sewing the outer half of the circle first and then the inner half of the circle, making sure that the needle is the same as the outer half of the circle.
⑤ Cutting the edges: Cutting the edges is a more technically demanding operation. It is much more complicated than cutting the edges of other parts, and it is possible to use the knife die for cutting in batch production. After the handle is sewn, the handle is placed flat, and the line is drawn with a circle gauge on both sides, and the line is 3~5mm from the edge of the core.
⑥Handle edge trim: Since the edge of the handle is hairy, it is necessary to trim the edge, in the handle generally.The specific operation method is as described above. When doing the edge trimming method, the edge is cut and sewn directly with the edge trimming method.
⑦Install the square ring: pry open the end of the bottom plate leather joint, and then embed the square ring into the head. After embedding, use a hammer to knock the joint of the square ring. together.
