Taizhou Xiongshi Plastic Mould Co., Ltd is a professional plastic cap mould factory in China – especially on the flip top cap moulds design and manufacturing. We started to make flip top cap moulds since 2009. After more than 10 years experience, our flip top cap moulds quality are all on the high level.
★ What is flip top cap?
Flip top cap is kind of plastic cap, we can call it flip top closure also. Its top cap can be closed and opened, and cap is a complete whole one part. Flip top caps are widely used on the disinfectant bottle, cosmetical bottle, liquid soap bottle, laundry bottle, shampoo bottle, etc.
★ Flip top cap 3D design
We make flip top cap 3D design according client’s samples or 2D drawing. Some customer make the 3D drawing by themself, and we make the mould just according the 3D design from customer. On figure flip top cap 3D, showed 4 types different design flip top caps. Caps have many diference sizes. By neck, 18mm, 19mm, 20mm, 24mm, 28mm, 32mm, etc. Thread have 400, 410, 420, etc.
When customer required 2D drawing of flip top cap, we can provide also. After part drawing ready, we can go on with mould 3D design.
★ Plastic flip top cap mould design
Before start to flip top closure mould design, we need customers to send their injection machine specification to us. Especially the injection machine platen drawing, which we can find the tie bar distance, location ring diameter, knock out position and distance, SR, etc. And also need to inform us the type of cooling fitting required, and cooling diameter required. The injection machine specification similar like below picture is what we needed.
Mould structure will follow the agreement on the mould quotation, and customer’s detail requirement.
★ PP Flip top cap mould steel
How to choose steel for flip top cap mould? Different plastic material, different mould life requirement, different performance on the plastic products finish and other special request on the mould principally use different grade mould steel. Most of flip top cap made by polypropylene. This plastic material is not so hard as PC, PMMA, Nylon, etc. Have widely choose on the mould steel.
Flip top caps widely used in the cosmetical packing, medicine packing, chemicals packing, etc. These are need huge quantity. So flip top cap mould need long life. In order to get long mould life, the mould steel need be improved on the hardness. As cosmetical packing, medicine packing, chemicals packing need their packing with high shinning and good looking appearance, in such flip top cap mould steel need with high shinning polish ability.
According above condition on the flip top cap mould steel. Its mould steel usually arranged as below. Inserted core and cavity usually use S136 steel, 1.2316 steel, etc. A/B plate use P20 steel, and mould base made by C45 steel. Flip top closure mould steel is customized according customer’s request. S136 steel and 1.2316 steel can be hardened 42HRC to 46HRC by vacuum quenching hardening treatment. After mould is ready, before mould delivery, we can make nitriding to make the hardness to more than 55HRC. So flip top closure mould guarantee life is more than 2,000,000 shots.
★ Flip top cap mould steel cutting
Mould steel plates are cutted from big steel plate according the mould design, which every mould steel plates have detail sizes. But steel after this cutting tooling sizes is a little bigger than we needed, so will need next tooling process – precise fly cutting tooling and precise grinding tooling.
Precise fly cutting tooling can quickly make the steel sizes same as we needed.
Also precise grinding tooling also can make the steel thickness to the requested thickness.
★ Flip top cap mould CNC milling tooling
CNC milling tooling is a process of rough tooling. Nowdays moulds tooling by cnc machines. This equipment make the tooling automatically and faster.
CNC milling tooling operation should be following the process schodule to make sure there is no mistake. Also make sure steel tooled with right sizes and good condition.
★ Flip top cap mould CNC engraving tooling
After CNC milling tooling, flip top cap mould core plate and cavity plate can go on CNC engraving tooling. This is the most important tooling process for butterfly structure for the flip top cap. As butterfly size tooled not correctly, this mould will be failed. So this process need to be carried on by a techical person who have rich experience in tooling flip top cap mould.
★ Flip top cap mould boring tooling.
The big holes on the flip top cap plates are tooling by boring machine. So far boring machine tooling is much better than cnc engraving tooling on the holes concentricity. That’s why we only use boring to tool the holes which will be assembling with round inserts.
★ Flip top cap mould lathe tooling.
Holes tooled by boring machine, and round inserts are tooled by lathe machine. For the cap thread section on the inserts are also tooled by lathe tooling machine.
After all the tooling process finished, we can assemble the flip top cap mould and polish the mould. Then test the mould to check the mould quality from the injection molding process and samples quality.
Our company making flip top cap close machine, please see the detail from the machine page.