The member that qualification is designed designs the point of the mould

One, every product that note model is beginning direction flying a model and branch molded lines want to decide its open modular way and branch molded lines above all when the design, reduce orgnaization of the slide block that smoke core and the effect that remove minute of molded lines to be watched external in order to assure as far as possible. 1, after way flying a model is certain, the reinforcement of the product, card is buckled, raised wait for a structure to be designed as far as possible agree with direction flying a model, reduce flat-fell seam line with avoiding to smoke core, prolong mould life. 2, after way flying a model is certain, can choose proper branch molded lines, avoid modular way to exist to buckle, in order to improve the exterior and performance. 2, rake of 1 of rake of drawing of patterns, proper drawing of patterns can avoid a product to pull hair (garland) . The rake of drawing of patterns of slick surface should ≥ 0.

5 degrees, fine Pi Wen (arenaceous face) the surface is more than 1 degree, surface of thick skin grain is more than 1.

5 degrees. Rake of 2, proper drawing of patterns can avoid a product to support, if carry white, top on the head,be out of shape, very broken. 3, outside face rake asks to be more than as far as possible when products plan of deep antrum structure inside exterior rake, impartiality of the mould when noting model in order to assure core, get even product wall thick, assure the data strength of product mouth place. 3, product wall thick 1, all sorts of plastic all have certain mural thick limits, general 0.

5 ～ 4mm, when the wall thick when exceeding 4mm, will cause cooling time to grow too, produce the problem such as reprint books in a reduced format, lv of take an examination changes product structure. 2, wall is large all can not cause exterior shrink. 3, wall is large all can not cause air hole and frit lapping defect. 4, reinforcement 1, the rational application of reinforcement, can increase product tigidity, decrease be out of shape. 2, the ply of reinforcement must ≤ (0.

5 ～ 0.

7) T product wall is large, cause exterior shrink otherwise. 3, the bosseyed rake of reinforcement should is more than 1.

5 ° , in order to prevent an injury. 5, round horn 1, too little likelihood causes round part product stress concentration, bring about product craze. 2, too little likelihood causes round part concentration of mould antrum stress, bring about model antrum craze. 3, the round horn with reasonable setting, return the treatment technology that can improve a mould, be like model antrum can be machined with R Dao Xi directly, and avoid inefficient electric treatment. 4, different round role may cause the shift of minute of molded lines, should combine actual condition to select different round role or clear part. 6, the appearance of aperture 1, aperture should as far as possible simple, take a circle commonly. The axial of 2, aperture agrees with direction flying a model, can avoid to smoke core. The 3, long way when aperture is compared be more than 2 when, should install rake of drawing of patterns. Right now the diameter of aperture should press trail dimension (the largest hypostatic size) computation. The long way of aperture of 4, blind is compared do not exceed 4 commonly. The distance that prevents Kong Zhen to develop curved 5, aperture and product edge is more than bore diameter dimension commonly. 7, of the model that note model smoke orgnaization of core, slide block to reach avoid 1, when model by direction flying a model cannot when successful drawing of patterns, should design orgnaization of the slide block that smoke core. Slide block of the orgnaization that smoke core can shape complex product structure, but easy cause the line of product flat-fell seam, defect such as shrink, increase mould cost to shorten mould life. 2, when the design fixes model product, if do not have special requirement, avoid to take core structure as far as possible. If the directional instead of aperture axial and muscle opens modular way, use model antrum core is touched wear wait for a method. 8, the 1 of hinge of an organic whole, tenacity that uses PP material, can become hinge design and product an organic whole. The 2, filmy dimension that serves as hinge should is less than 0.

5mm, and keep even, when hinge of the 3, an organic whole that note model, runner can design some a side in hinge only. 9, insert 1, insert is set to be able to increase opening of small whorl of precision of local intensity, hardness, dimension and setting in the product that note model (axis) , satisfy all sorts of special requirement. Can raise product cost at the same time. 2, insert is copper commonly, also can be other metal or plastic. 3, insert is in built-in and plastic medium part should be designed stop to turn and be prevented pull out structure. Be like: Roll flower, aperture, fold shoulder of curved, squash, axis to wait. All round 4, insert plastic should add appropriately thick, in order to prevent model stress craze. When insert of 5, design, should mature its locate mediumly in the mould means (aperture, sell, magnetic) 10, label product marks to be installed commonly in the surface inside the product evener place, use raised form, choice way sets a label to the face place that agrees possibly with feet of direction flying a model, can avoid to be pulled. 11, note model because precision notes the inhomogenous sex of the shrinkage when model and uncertainty, note model precision is apparent under the metal, cannot the dimension public errand of spare parts of simple apply mechanically machinery should choose proper tolerancepublic errand requirement by the standard.

Our country also released GB/T14486 1993 - 93 " project plastic pattern model is plastic a dimension public errand " , the plastic raw material that the architect can use according to place and make an use demand, according to the standard medium regulation is made certainly dimension public errand. Want a foundation at the same time factory comprehensive strength, the design precision of the person of the same trade's product will decide precision of suitable design public errand. 12, note model be out of shape the tigidity that improves composition of the product that note model, decrease be out of shape. Avoid flat construction as far as possible, reasonable setting flange, concave and convex structure. Install reasonable reinforcement. 13, buckle 1, will buckle a device to be designed many buckle at the same time common, make integral device won't because be buckled individually damage and cannot run, add its service life thereby, it is to take an examination of filter to add round part more again, increase strength. 2, it is the public errand that buckles a relevant measure the requirement is very strict, buckle the position to be formed easily too much buckle an attaint; Contrary, it is difficult to buckle the position to assemble the position too less the phenomenon that has appeared to loosen at control or assorted part. Settling way is to want obligate to change a model to add the means of glue easily to come true. 14, solder (heat board solder, ultrasonic solder, oscillatory solder) 1, use solder, can increase connection strength. 2, use solder, can simplify products plan. 15, the contradiction between reasonable consideration craft and product function when 1 design fixes model product must consider the contradiction between product exterior, function and craft integratedly. Sacrifice sometimes partial craft sex, attainable very good exterior or function. When 2 structures design cannot avoid to fix model defect really, let what blemish happens in the product concealment as far as possible place. 16, screw column aperture and the concern that accuse screw diameter oneself attack M2 1 of aperture of screw screw column oneself.

7mmM2.

3 2.

0mmM2.

6 2.

2mmM3 2.

5mm seventeen, the design principle of BOSS: 1, pillar is not used alone as far as possible, should join as far as possible the wall outside coming or use together with reinforcement, the purpose is to strengthen the intensity of pillar to reach make size flow smoother. 2, pillar height is commonly won't exceed pillar diameter double half. Because exorbitant pillar can be brought about,air is surrounded when plastic component shapes ( Zuo is spent too Zuo causes aperture. is anxious, fill up the) such as inadequacy. 3, if pillar height exceeds pillar diameter double half, the pillar of the wall outside be far from especially, the method of the strength that enhances pillar is use reinforcement 4, the form of BOSS with form advocate, treatment of of other form is not easy 5, the position of BOSS cannot approach Zuo part too or outside wall, should maintain a paragraph of distance with the wall outside the product 6) , flesh of part of usable eliminate of BOSS week is thick (open crater namely) prevents cave in receiving Jun 7) , the angle moving a model of BOSS: Normally outside take 0.

5 ° , take inside 0.

5 ° or 1 CNC Milling