Precautions for the appearance of plastic molds

Precautions for the appearance of plastic molds

 

1: The content of the nameplate should be printed with the mold number, mold weight (KG), and mold size (mm). The characters are all marked with 1/8 inch code, and the characters are clear and neatly arranged.

 

2: The nameplate should be fixed on the mold leg near the rear template and the reference corner (15mm away from both sides), fixed with four rivets, fixed reliably, and not easy to peel off.

 

3; The cooling water nozzle should use a plastic block to insert the water nozzle, ￠10 tube, the specification can be G1/8″, G1/4″, G3/8″. If there are special requirements in the contract, please follow the contract.

 

4: The cooling water nozzle should extend out of the aluminum cnc parts surface, and the head of the water nozzle recessed into the outer surface should not exceed 3mm.

 

5: The diameter of the cooling water nozzle avoidance hole should be ￠25, ￠30, ￠35mm three specifications, the outer edge of the hole has a chamfer, the chamfer is greater than 1.5×45, and the chamfer is the same.

 

6: The cooling water nozzle must have an entry and exit mark, the inlet water is IN, the outlet water is OUT, and the sequence number is added after IN and OUT, such as IN1 and OUT1.

7: Mark English characters and numbers should be capitalized (5/6″), the location is 10mm directly below the tap, the handwriting is clear, beautiful, neat, and evenly spaced.

 

8: The inlet and outlet nozzles and the inlet and outlet nozzles should be the same as the cooling water nozzles, and add G (gas) and O (oil) with a blank character before IN and OUT.

 

9: There are water nozzles on the upper and lower sides of the mold installation direction, which should be built-in, and open the diversion groove or have a support column under it for protection.

 

10: The oil nozzle or water nozzle that cannot be built-in should be protected by a support column.

 

11: Machining uhmw mold base must have a reference angle symbol for each template, capitalized English DATUM, the word height is 5/16″, the location is 10mm away from the side, the writing is clear, beautiful, neat, and evenly spaced.

 

12: Each template must have a part number. The number is 10mm from the bottom directly below the reference angle symbol, and the requirements are the same as No. 11.

 

13: Mold accessories should affect the lifting and storage of the mold. For example, there should be support legs to protect the oil tank, water nozzle, and pre-reset mechanism that leak underneath during installation.

 

14: To install the support leg, use screws to pass through the support leg and fix it on the mold base, or to fasten the excessively long support leg to the mold base by turning external threads.

 

15: Machining uhmw plastic mold ejection hole must meet the specified injection molding machine, except for small molds, in principle, one center cannot be used for ejection (when the length or width of the mold is greater than 500mm), the ejection hole diameter should be larger than the top The rod is 5-10mm larger.

 

16: The positioning ring should be reliably fixed (usually three M6 or M8 hexagon socket screws), the diameter is generally ￠100 or ￠150mm, 10mm higher than the top plate. If there are special requirements in the contract, the same shall apply.

 

17: The mounting hole of the positioning ring must be a counterbore, and it is not allowed to be directly attached to the top surface of the mold base.

 

18: When a custom cnc aluminum mold weighing more than 8000KG is installed on the injection molding machine, the screw must be pressed by perforation, and the plate must not be pressed separately. If the equipment uses hydraulic locking molds, screw perforations must also be added to prevent the failure of the hydraulic mechanism.

 

19: The sprue bushing ball R is larger than the nozzle ball R of the injection molding machine.

 

20: The inlet diameter of the sprue bushing should be larger than the diameter of the nozzle injection port.

 

21: The overall dimensions of the mold must conform to the specified injection molding machine.

 

22: The surface of the mold base must have pits, rust marks, unnecessary rings, water, gas, oil holes, etc., and other defects that affect the appearance.

 

23: Each plate of the mold base must have a chamfer greater than 1.5mm.

 

24: The mold should be convenient for hoisting and transportation, and the mold parts must not be disassembled during hoisting (except for the oil cylinder, which needs to be packaged separately). The lifting ring interferes with the faucet, oil cylinder, pre-reset rod, etc., and the position of the lifting ring hole can be changed.

 

25: Each mold component weighing more than 10KG must have a suitable lifting eye hole. If not, corresponding measures must be taken to ensure that the component is easy to disassemble and install. The size of the ring and the position of the ring hole are designed according to the relevant enterprise standards.

 

26: If ejector mechanisms such as ejector rods and ejector blocks interfere with sliders, etc., there must be a forced pre-reset mechanism, and the top plate has a reset travel switch.

 

27: The cylinder core and ejection must be controlled by a travel switch, and the installation is reliable.

 

28: The mold oil separator should be fixed and reliable. The oil pipe connecting the oil separator and the oil cylinder should use a rubber tube, and the joint should use standard parts.

 

29: There must be trash nails on the thimble plate. The clamping device should be installed reliably, with positioning pins, symmetrical installation, no less than 4 (small molds can be 2).

 

30: If the injection molding machine adopts an extended nozzle, there should be enough space inside the positioning ring to ensure that the extended nozzle with heating ring of the standard injection molding machine can extend in.

 

31: All inclined tops can be removed from a hole that passes through the bottom plate and the thimble bottom plate and whose angle is the same as the inclined top angle.

 

32: The bottom surface of the screw mounting hole must be flat. Screws above M12 (including M12) must be (12.9 grade).