What is DFM-Design For Manufacturing
Design For Manufacturing ( DFM ) is the the company’s initial idea prior to mold plastic parts design. Its main target is how to design the mold core part of a plan to meet the requirements set plastic parts. Its content is mainly formed of the gate, parting surfaces, core-pulling ideas.
- gate design: by the Pro / E of Plastic Adviser of the plastic parts were filled gate position and performance analysis, can find the appropriate position into the plastic. Since the gate point is set in the shape of the surface of the plastic parts, the need to minimize traces of pouring, and taking into account its own mold can pull waste drying track, so a point into the plastic.
- sub-surface: Plastic Housing Knobbie open mode direction is vertical upward, and set draft is of 1 °. Sub-surface plastic parts should be selected in the bottom surface, it is a good mold release and will not affect the appearance of the quality of the plastic parts can also use the gap and core, thimble, etc. into the sub-gap discharge. To facilitate the process, improve accuracy, the child in plastic molded side hook grooves. This allows the shape of the sub-surface of a plane, more convenient
- pulling mechanism design: careful observation of three-dimensional model of the plastic parts can be found there is a need to use the slider slot for easy mold after molding. It requires the use of angle pin block side parting pulling mechanism.
H 13 mould steel and H 13 die steel mechanical properties
4Cr5MoSiV die steel die steel, referred to as H13, is a kind of air cooling type heat hardening die steel, wCr=5%, the hardenability of $150.m steel is very good, under air cooling can be hardened. H13 die steel temperature has the toughness and wear resistance of high strength, good heat in, under working temperature with thermal fatigue performance, good anti in addition, good oxidation resistance, small distortion of heat treatment. The mechanical properties of Hl3 die steel Higher Hl3 die steel heat resistance and wear resistance, and toughness similar hardenability is good, is a good material for the production of forging die. Due to higher toughness, even in the quenched state also have certain toughness, thermal fatigue resistance is particularly good, so use it for making high speed hammer forging die is very ideal, and sometimes also used for the production of die casting mold, extrusion mold etc.
Plastic Mold maintenance and repair matters needing attention
Mould repair note:
1 disassembling the mould, avoid bumping and the water spray, mobile tostationary.
2 spray hot die, then spray a small amount of release agent
3 to conduct a comprehensive inspection of the mold and anti rust treatment: carefully wipe dry cavity, core, the top of the water and sundries institutions and for position and other parts, and spray mold antirust agent and butter.
Maintenance of the mold
In the process of plastic mould in continuous work, due to wear, easy to cause themovement of parts in the process of lubricant deterioration, leakage,pressure injury issues such as plastic materials, the need for mold maintenance.
Mold maintenance is generally divided into the daily maintenance and lower die maintenance
Mold maintenance generally include the following aspects:
1 regular derusting (appearance, PL surface, cavity, core etc.)
2 regular re add lubricant (ejection mechanism for etc.)
3 regular replacement of wear parts (rod, bolts etc.)
4 other places that need attention
Die mold maintenance required by the professional maintenance staff will die after removal of the mold cavity of the mold, a thimble test protection professional.