(1) Handle the structure of the components
The "snake head" handle is composed of the face, the core, the base plate and the square ring.
(2) The production process of the handle
The production process of "snake head" handle is complicated, and it is one of the representative handles on briefcases.
①Cut the core: cut the cardboard into rectangles of 92mm in length and 30mm in width, laminate the sample on the cardboard, draw lines along the four sides of the sample with an awl, put the core and fill in the core each piece, and then cut it with a scribe. As a core of a piece to be cut in the middle of 3mm into two pieces.
② cutting the bottom board skin: first the bottom board skin blank sheet cut to a standard thickness of 1.5- 2.0mm, and then the sample board composite to the bottom board skin on the grain layer, with the cone along the edge of the sample board in the grain layer drawing lines, cut with a scribe according to the lines drawn, until the line outside the excess edge material completely removed.
③Take cuttings to the core: in the front of the cut core Xu on the adhesive to take a ride on the grain layer of the bottom plate skin, the straight edge of the core in the middle of the concave edge and the concave edge of the bottom plate skin flush, two pieces of hitch after the middle empty 3mm narrow groove, to be dried adhesive in the middle of the core to do chamfering, so that the core head becomes 25 ° ~ 30 ° beveled head, operation as described previously, and then smooth with sandpaper, and finally the two ends of the bottom plate skin bending The edge of the connection is trimmed.
④Gluing the surface skin: first of all, the edge of the two sides of the surface skin to trim, the edge of the trim well in the middle of the surface skin and the core to apply adhesive, after the adhesive is not sticky, the surface skin will be compounded to the core and to the core groove to be firm, and finally scraped flat service glued to the core.
⑤ pad core: pad core is sandwiched in the middle of the handle parts, it can ensure that the end of the bottom plate skin bending joint to leave a gap so that the square circle can stretch activities. Operation, first in the pad core ends wipe color, and then coated with adhesive on both sides, the pad core composite in the middle of the bottom plate skin, the pad core ends and the core ends aligned, with a hammer to knock firmly.
⑥Sheet to connect the bottom plate skin: will build a good core and pad the core of the bottom plate skin ends with a slice blade bevel, one side of the sheet grain layer, the other side of the sheet mesh layer. The length of the bevel is 20~25mm, then apply adhesive on both ends of the bevel and the core of the pad, at the same time, the two ends of the base plate skin will be compounded to the core of the pad also coated with adhesive, to feel no stickiness, the two ends of the base plate skin will be bent to the lined up, then the square ring set in the head of the base plate skin, and then the two heads of the base plate skin will be joined with the pad.
⑦Sewing the handle: Sewing the needle code in the middle slot of the core, the first side, the stitch distance is 6~7 stitches per 25cm, pay attention to the start and end of the needle thread should be left longer.
⑧Sewing: first wipe some water on the top skin to make the skin soft, wrap the top skin on the bottom board, draw a line in the middle and then cut off the excess skin, the other - side of the same operation so that the two sides meet, then use a needle and thread to sew the two sides together. The first stitch is 2mm away from the edge, and the needle is threaded through the double loop from the opposite side, and then crossed, each stitch is 5mm apart, like a shoelace. The last double-loop stitch ends.
