Common Design Points On Last Bottom

The design point of sandals is mainly due to the reasonability of the parts, so the design points of sandals should be selected on the bottom line.

As shown in Fig. 4-4-1, there are 5 sets of design points selected on the last bottom, and a control line can be formed on the last bottom and the last surface to prevent the forward and backward of the shoe.

First, draw the center line, the oblique width line and the heel line on the last bottom template, and then find the design points in turn.

 

Note: some of all air sandals last may have extra long allowance. When you look for design points, you must exclude the extra length and choose the normal last sample length.

Take the 1 / 4 Go point of the last bottom line on the bottom line, then pass the Go point to make the vertical line of the heel line, and get the G1 and G2 points respectively with the inside and outside, and connect them into the G1G2 line.

The G1 points and G2 points are used to design the post control points.

2. front nose control line (ALA2 line)

Take the 1o% point Ao of the last bottom sample on the bottom line, then make 80 of the bottom line.

The angle of the tilt is A1, and the A2 point is placed outside the front line to connect the A1A2 line.

The 10% of the last bottom length is easy to get, the 250 male last is 25. 5mm, and the 230 female last is 23. 7mm.

If there is a super long quantity, no calculation will be included.

When making 800 obliquity, you can make 90 first.

Angle, then cut out 60 with compasses.

Angle, use the remaining 30.

The angle minus 2/3 is 80.

Dip angle.

The A1A2 line is the shoe mouth control line.

The front line is the first line of defense to prevent the foot from going forward, which can reveal 2.5 toes.

3. small toe end control line (b1b2 line)

At the tip of the little toe (A3 point), make a parallel line of A1A2 line, hand over the inside and outside to get the B1 and B2 points, and connect the b1b2 line.

The point length of the tip of the small toe is as follows: BA3=82.5% * foot length tolerance.

Male No. 250 BA3 =206. 25-4=202. 25 + 4 (mm)

Female 230 BA3 =189. 75 -3.5 =186. 25 + 4 (mm)

The end point of the little toe is 10% more than that of the first metatarsophalangeal joint. It can also be moved from the A4 point to 10% (25mm, 23mm) to determine the A3 point.

The Bi B2 line is the second line of defense to prevent the foot from rushing ahead.

When designing sandals, pay great attention to the parts of the small toe. If the position design is unreasonable, it will cause the problem of the small toe, the small toe or the little toe running out of the upper.

6 of the b1b2 line.

The point has moved to the back of the little toe end, and it will not cause any problems of top, card or run by using the b1b2 line directly.

At present, most of the sandals on the market are directly controlled by the b1b2 control line. They can reveal 4.5 toes. B2 points can prevent the foot from advancing forward before the outboard point of the little toe.

4. metatarsophalangeal joint control line (ClC2 line)

W is used as the parallel line of the b1b2 line, and the C1 and C2 points are intersected with the inside and outside, and the C1C2 line is obtained after joining.

The C1C2 line is not a slant line. The C1 point can prevent the back of the foot after the point of the first metatarsophalangeal. The C2 point can prevent the foot from going forward before the fifth toe.

Therefore, the c1C2 line has the dual function of preventing the foot from flushing and backing.

Because the metatarsophalangeal joints of the feet are active, it is generally not possible to design the position of the broken sides in the metatarsophalangeal joints, so as to prevent the edges of the parts from rubbing their feet.

But C1 and C2 have already staggered the metatarsophalangeal joints, so they can be directly used to design parts.

5. waist nest control line (did2 line)

At the 1 / 2 position between the W point and the Go point on the bottom line, D is fixed.

Point, then go through D.

The points are parallel lines of C1C2 line, which are intersected with the inside and outside, and get D1 and D2 points. After connecting, D1D2 lines are obtained.

The D1D2 line is at the thinnest position of the waist, which can effectively prevent the back of the foot.

The control points on the last bottom are mainly to prevent the forward and backward steps of the foot. To prevent the shoes from falling down, they should also find control points and control lines on the last surface.

When designing sandals, we need to design the last floor template with 5 control lines because of the design of the aircraft board.

As shown in Fig. 4-4-2, there are 5 control lines on the template. The two ends of each control line are different from the location inside and outside the control line.

Judging from the effect of the representation, this difference is a dislocation, so in the design part, the location of the component can be found through the "dislocation" method.