You should be a mold buyer.
This is mainly combined with the product to acceptance,
If you need the mold:
1 Check the trial mold product is in line with your requirements (including the appearance of the product, the size, the material, there are no defects, whether all the hit the product is perfect?)
2 check the material of the mold, generally you can not see, this time you need to file a good, signed. Later problems can be used as a basis.
3 Check the basic features of the mold, check the productivity of the mold, and the degree of coordination of your injection molding machine.
Finalize the packaging of the mold.
If the mold is left in the factory, that is, the mold is placed in the mold factory, and later use their injection molding machine to use your mold to hit the product, it is a little easier. But the above three points should still be done.
Here are some basic knowledge of Baidu:
Injection mold acceptance criteria, from the mold structure, the quality of rubber parts and injection molding process requirements of the three recognized mold standards, according to which the quality of the mold assessment, scoring, and hope to continuously improve the quality of the mold; to ensure that the mold can be put into production normally, and the production of qualified quality of the rubber parts, to meet the requirements of the product design. [1]
Edit this section of the structure of the part of a mold material
1, mold embryo of the steel used in each plate is not less than 1050 steel. (Equivalent to the Japanese ace steel)
2, embryo Division, edge nail, back to the nail, in the bracket Division, in the bracket side of the surface hardness of the material used is not less than HRC60.
3, beer ABS, HIPS material before the mold and the front mold inserts, with super P20 steel (such as 718, M238, etc.). Rear mold with general P20 steel (such as MUP, M202, etc.), rear mold inserts with 1050 ~ 1055 steel or better steel.
4, beer PC, POM, PE and other corrosive materials before and after the mold and its inserts need to use 420 steel (such as S136, M300, M310, etc.).
5, beer mirror mold steel used for 420 steel (such as S136, M300, M310, etc.).
6, tilt top, pendulum surface hardness of not less than HRC35, push plate surface hardness of not less than HRC28.
7, if the customer specifies that should be used in the mold steel, the mold factory should meet the customer requirements.
Two, the mold should have the structure
1, mold marking: mold embryo should be according to the customer's requirements on the outside of the text. Mold embryo according to customer-specific location on the P / N number, rubber parts number, a multi-cavity mold should be punched on the cavity number, more inserts should be punched on the insert number according to design requirements.
2, the mold should be installed with suitable flange ring, and open the standard mold pit.
3, three-plate mold should be installed buckle lock and locking nails, as well as should be installed to pull the hook and spout plate, first open the spring ring.
4, mold base plate should be opened qualified top stick hole, hole position should be in line with the ejection balance requirements.
5, mold thimble plate should be installed reset spring, when the mold is closed, the front template should be the first contact back to the needle, otherwise the mold should be installed to reset the mechanism (with line structure of separate requirements).
6, row position structure.
a, row position movement should be smooth, the contact surface should be open oil groove.
b, the line should be installed on the line to make the role of the spring pop-up line, and the installation of limit devices.
c, in the height of the direction of movement of the haf block *** launch height can not exceed 2/5 of the length of the guide groove.
7, the ejector mechanism.
a, the thimble should be set so that the plastic parts of the de-molding does not produce permanent deformation, top white, does not affect the appearance of plastic parts.
b, the ejector mechanism should be flexible, reliable, no wrong action.
c, the ejector pin, the cylinder top surface is not flat, the ejector pin, the cylinder should be positioned.
8, the bottom plate should be uniformly set on the garbage nail, garbage nail height should be consistent.
9, 4545 or above the large mold should be added in the edge of the support, a set of mold in the number of barrels up to or exceeding 16 should be added in the edge of the support.
10, runner diameter, length processing should be reasonable, under the premise of ensuring the quality of molding to shorten the process, reduce the cross-sectional area in order to shorten the filling and cooling time, at the same time, the pouring system should be the least loss of plastic. Runner should be set up generally cold material well.
11 Cavity distribution should be reasonable, should be consistent with the principle of simultaneous filling of the cavity, the gate should not affect the appearance of the rubber parts, to meet the rubber parts assembly, in the beer allowed to try to achieve the minimum amount of gate residue.
12 Cooling system.
a, the water runners should be divided so that the temperature difference between the various parts of the mold surface within 10 ℃.
b, water runners in and out of the hole location does not affect the installation, the size of the throat for 13mm.
c, in the cavity surface of the inserts, rows of bits, etc. should generally be through the water runners, battery pockets, handle bits, horn bits and other inserts must be through the water runners.
d, mold water runners should be watertight, and in the runners should be marked at the entrance and exit "OUT" and "IN". If more than one group of water runners should be added to the group number.
13 Battery pockets and other parts of the front mold to produce a greater tightening force should be corresponding to the mold after the part of the uniform increase in hook and needle.
14 Mold structure to ensure smooth exhaust.
15 Pillar height over 20mm should be applied to the cylinder, more than 25mm bone should be increased according to the design requirements of the uniform glue away from the meter boy.
16 The mold should be uniformly distributed according to the strength requirements of the support head to prevent mold deformation.
17 Mold cavity stress center should try to be consistent with the mold center, the cavity center of up to 25% of the mold center.
18 The surface of the shape will cause shrinkage of the corresponding rear mold column should be added crater.
19 The parting surface is one-way slant and large deep cavity molds, the parting surface should be equipped with reliable self-locking device.
Three, the structure of the mold is not allowed
1, the mold is not allowed to have a pointed steel and a height of more than 2mm, the thickness of less than 1mm of thin steel.
2. Except for the BOSS column, the ejector pin is not allowed to contact with the front mold.
3. No abnormal noise is allowed when the mold is opened and closed.
4, the cavity edge 5mm range does not allow the red Dan test is not allowed, and the parting surface red Dan test is not allowed to be less than 80%.
5, all fastening screws are not allowed to loosen.
6. All hooks and needles are not allowed to be different.
7. The rubber parts are not allowed to have the phenomenon of sticking to the mold.
8, the mold does not allow ejection unbalance phenomenon.
9, mold height direction before and after the template does not allow the lack of pulling hole.
10, mold assembly is not allowed to miss or wrong parts. [1]
Edit this section of the quality of the rubber parts, a basic size
1, the geometry of the rubber parts, size and precision should be in line with the official valid mold drawing (or 3D file) requirements.
2, general structure size standard.
a, the general requirements of the glue parts to the average thickness of the glue, non-average thickness should be in line with the requirements of the drawings.
b, stud root diameter: M3 screws for φ6.0+0.2mm, crater diameter φ10.0mm; M2.6 screws for φ5.0+0.2mm, crater diameter φ9.0mm.
c, cross-bone, peripheral bone root thickness: 1.2+0.2mm.
d, the top of the button's top Rubber cross-bone top thickness The thickness of the top Rubber cross-bone of the button: 0.9+0.1mm.
e. The thickness of the top wall of the barrel column: 1.2±0.1mm.
f. The thickness of the glue of the rear mold of the battery box is less than 2.0mm.
g. The misalignment of the glue of the front and rear molds in the same PL surface of the plastic parts is less than 0.05mm.
h. The coordination of the face and the bottom of the shells.
3, secondary or tertiary stops require PL surface misalignment of less than 0.1 mm, there is no scratching phenomenon;
4, the package stops with a single side clearance of 0.1 ~ 0.3 mm, complex shape to take the larger value.
a, the battery door and the battery box in the horizontal direction between the single side clearance of 0.2 ~ 0.3 mm.
b, button and hole with. General geometric shape of the button and hole unilateral clearance of 0.15 ~ 0.25 mm, shaped knob and hole unilateral clearance of 0.3 ~ 0.4 mm, oil injection knob clearance should be taken as a large value. Knob and flower with its fit to meet the safety test standards.
c, the insertion of the card with the bit. Plug card door and the face of the bottom of the shell with a single-sided clearance of 0.2 ~ 0.3 mm. Socket and plug box single-sided clearance of 0.5 mm.
d, the four major parts of the rotary axis bit axial single-sided minimum clearance of 0.1 ~ 0.2 mm.
e, the LOCK and its with the pillow hole single-sided gap of 0.2 mm.
f, the bracket and its with the hole single-sided gap of 0.1 ~ 0.2 mm, length greater than 150 mm, the length of the hole should meet the safety test standards. 0.2 mm, length greater than 150mm take the greater value.
g, COVER and its fit hole unilateral clearance of 0.1 mm.
h, ROLLER and its fit hole unilateral clearance of 0.5 ~ 1.0 mm. [1]
Edit this section of the surface defects a. Process conditions can not be met in the case of:
1, the surface of the adhesive parts are not allowed to be defective.
a, go glue uneven (or lack of material, stagnant water) b,, burnt c, top white
d, white line e, Phi Peak f, blistering
g, pulling the white (or pulling the cracks, pulling the breaks) h, baking prints i, wrinkles
2, the surface of the surface of the restricted defects and the degree of acceptance.
Serial number Defect name Acceptance
1 Water pinching pattern A, the strength of water pinching pattern can pass the functional safety test. b, the length of water pinching pattern of general touching perforation is not more than 15 mm, and the water pinching pattern of round flare hole is not more than 5 mm. c, the length of water pinching pattern at the fusion of multiple water ports is not more than 20 mm. d, the water pinching pattern at the wrist is not in the middle of the wrist or the position of the force. e, the column position corresponding to the E. The outer surface of the rubber part is free of water fringes. F. The surface of the sparkle pattern of the key bracket is free of water fringes. G. The water fringes of the internal parts are not restricted in the position of the strength allowances.
2 Shrinkage A, in the surface of the rubber part is not obvious position allows a slight shrinkage (feel less than the dent). B, the internal parts of the size of the allowable slight shrinkage. C, the rubber part of the non-appearance of the size of the surface does not affect the strength of the shrinkage of the unrestricted.
No. Defect name Acceptable
3 White dragging A, the glue piece has a spark pattern or sunburst pattern side is allowed to have a slight white dragging, and can be eliminated with the abrasive paste processing. b, the appearance of the glue piece in the first side of the white dragging without.
4 Deformation A, the unevenness of the larger bottom shell support foot is less than 0.3mm. B, the unevenness of the KEY bracket is less than 0.5mm. C, the deformation of the rubber parts should be adjusted and controlled by the racks after the plastic molding. D, except for the above articles, the rubber parts have no deformation.
5 Air lines A, for PE, PA, PVC, PC and other rubber parts, the water mouth is allowed to have a slight air lines. The air lines do not protrude from the water mouth 3.0mm. B. For bobbleheads with thicker and uneven wall thickness, the water mouth and carving of the protruding bits are allowed to have a slight air line. c. In addition to the above two articles, there is no air line on the surface of the rubber parts.
6 yellow gas A, larger and into the water in the middle of the bottom shell; water near the mouth allows a slight yellow gas, the degree of yellow gas should not affect the original color of the rubber parts, only slightly change the depth of the color. b, in addition to the above situation, the rubber parts without yellow gas.
7 water mouth residue A, the location of the water mouth of the rubber parts and the residue in the assembly of no interference.B, the water mouth bit no rubber poop flowers, no thimble bit of film submerged in the water.C, the appearance of the rubber parts assembled surface without water mouth traces.
8 Serpentine A, no serpentine on the exterior surface of the assembled rubber parts. B, internal parts or assembled non-exterior surface is allowed to have serpentine if it can not be improved.
9 Sharp, thin rubber parts Except for the keys and other rubber parts are allowed to have specially designed sharp, thin rubber bits, other rubber parts have no sharp, thin rubber bits. [1]
Edit this paragraph surface finishing 1, surface high-gloss.
a, high-gloss surface should be flat, with mirror effect;
b, the non-appearance surface of the front mold surface and the internal parts are allowed to have a slight machining marks on the surface.
c, The high-gloss surface is not allowed to have scratches, rust, spots and other defects.
2. Surface finish (EDM or sunburst).
a, the grain meets the design requirements, the grain should be uniform and the side and the surface.
b, the interconnecting parts are required to have the same grain. (Except for the old parts to match)
3. Surface font.
a, the height of the surface font in line with the design requirements, and to be uniform.
b, font width, size, density, number of words, position in line with the film requirements.
4, CORE surface finishing.
a, the general CORE surface to save light, no obvious spark pattern and processing knife marks, except for special requirements.
b, transparent plastic parts or assembly after the appearance of the surface in line with the design requirements. [1]
Edit this section of the process part
Injection mold rating scale [2]
1, the mold in a certain range of injection molding process conditions, should have the stability of the beer work and process parameter tuning repeatability.
2, the injection pressure during molding should not exceed 85% of the rated maximum injection pressure of the injection molding machine.
3, the injection speed of the mold beer work, three-quarters of the stroke of the injection speed is not less than 10% of the rated maximum injection speed or more than 90% of the rated maximum injection speed.
4. The holding pressure of the mold should not exceed 85% of the actual maximum injection pressure.
5, mold clamping force during molding should not exceed 90% of the rated clamping force of the applicable model.
6, beer process, the product and the water mouth material should be easy to take out, safe (time is generally no more than 2 seconds). [1]