Q: What's the difference between a big nozzle and a small nozzle?
1. The large nozzle is a mold with no parting in the front mold, which is also called a two-plate mold guide pillar assembly, while the small nozzle is a fixed mold with parting, that is, the mold is split more than once (at least twice).
2. Generally speaking, a large nozzle means that there is more or less a nozzle on the product after demoulding, and a small nozzle is just the opposite!
3. The front die of the large nozzle is a fixed thin nozzle with a plate, and the simplified standard nozzle is outside the front die.
4. One more nozzle push plate ~ ~ A thin nozzle means one more nozzle push plate than a large nozzle.
5. Large nozzles: nozzles that need to be removed manually or by other means. Fine nozzle: a nozzle that separates the product from the flow channel after ejection without manual or other disassembly.
6. Simply put, the large nozzle is a two-plate mold and the small nozzle is a three-plate mold.
7. Simply put, the large nozzle is a two-plate mold and the small nozzle is a three-plate mold. There is only one scraper between them.
8. Fine nozzle means: one more nozzle pusher than large nozzle.
9. Unrestricted gate (large nozzle): Advantages: fast filling speed, low pressure, strong feeding capacity, suitable for plastics with high viscosity and poor fluidity, and small pressure loss. Disadvantages: long hole sealing time, slow cycle and large internal stress.
It has a great influence on plastic parts and is difficult to remove. Restricted gate (fine nozzle): Advantages: shearing, friction, viscosity reduction, easy filling, clear texture, fast efficiency cycle, reducing internal stress, preventing deformation and fracture, and little influence on products.
Disadvantages: high injection pressure, low filling capacity, low pressure, easy decomposition, discoloration, shrinkage and sagging of heat-sensitive plastics!
10, the difference between large and small nozzles is the difference between two plates and three plates of the master mold. Small nozzle is also called three-plate mold, which adopts glue injection method and has a quick stripper in the middle. When the glue is fed, the material head is separated from the product.
Separate from the nozzle, so that the material can be separated automatically. Three-board molds are more equipped with resin or mechanical switches, small pull rods, large pull rods (the mold can be designed when it is small), demoulding and nail pulling. front
The two types mainly control the sequence of mold opening, and the big pull rod plays the role of protecting the small pull rod. The pull nail is installed on the fixed plate of the female die and used to pull the material head on the stripper plate.
1 1. Generally, a large nozzle needs a nozzle thimble, and a small nozzle needs a needle withdrawal. The small nozzle goes straight into the water, and the product does not need to be treated after being taken out; Generally, the large nozzle is straight in, and so is the product after it is taken out.
You need to cut off the nozzle. Large nozzles are divided into edge-straight type and backing-straight type.
12, the nozzle has three plates and two special plates! Feed inlet, large and small, 0.6-1.2 mm. Put the die on the pull rod, and pull out the material head by hand in the middle of the upper template 3! Usually used on the surface of products.
Quality products, shells, bottle caps, gears and so on! Large nozzles have direct feed type, submerged type and other types. Direct feeding is also small and big. For large products, 1 is used for direct feeding, such as large boxes.
, turnover box, you can stick a trademark shell! Large nozzle die, pull rod to install the lower die, and push it together with the upper rod!