Fifth, plug hole printing material
Plug-hole printing material is a one-liquid dilute alkali-soluble printing material, which is used to block through-holes (metallized holes) when it is used for double-sided or multi-layered plate positive plate making, so that it is not destroyed by the etching liquid and masked with dry film. There are similarities, which are used in the manufacture of double-sided or multi-layer printed boards by the plugging method. It eliminates the need for tin-plated lead alloys and tin-reduced lead alloys, reducing the number of processing steps and making them economical and practical.
The plug hole printing method of plug hole has roller coating, dip coating, and also can use a special plugging device to press the printing material into the hole, and then it can be cured. As a plug printing material, as long as the curing thickness reaches 0.7 mm on one side, whether the solidification in the middle does not affect the anti-corrosion ability, the plug hole printing material has two kinds of thermosetting and photo-curing.
The thermosetting plug printing material is dried at room temperature for 4-6 h (hours) or baked at a temperature of 80°C for 1 h. It is required that the plug hole is flat, has good adhesion, does not damage the coating, and is resistant to acid or alkaline etching liquid when worn. It can be removed by 2% to 4% NaOH solution. Since the thermosetting printing material has a solid content of about 75% and contains a solvent, the solution volatilizes during curing, and the printing material tends to produce concave phenomenon. Since the light-curing type contains no solvent, the plug hole printing material is smooth and full, not Concavity will occur (Figure 3).
Figure 3 Thermosetting and photosetting plug printing
Frozen Meat Breaker And Grinder
Frozen meat breaker/frozen meat breaker/meat grinder/meat mincer is the first step of high quality products production. They are used for pre-breaking frozen meat blocks stacked on pallets. It includes bone saw series, frozen meat cutting machine, frozen meat flaker,grinder series, etc. Customers will use different machines depending on the processing needs and to form an automatic production line. No need of defrosting of the meat, Helper`s breaker series has been designed to cut off a whole block of meat in meat pieces with a blades system, avoiding second time pollution and keeping meat texture.
Large frozen meat breaker series: Bone saw, Frozen meat cutting machine, frozen meat flaker.
Frozen meat grinder series: JR-120, JR-140, JR-300, chopping and grinding combination system.
Rib Chopping Machine,Frozen Meat Flaker,Frozen Meat Cutter,Meat Mincer,Meat Grinder,Frozen Meat Breaker
Helper Machinery Group Co., Ltd. , https://www.helperfoodtek.com