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2. TONVA mould produce process
    2.1 Product design: Customer  send  us  the  product  drawing or sample directly; or  we  draw  the  product according  to customer requirement.
    2.2 Mould  Design: After  the  product  drawing  confirmed by customer,  We'  ll  start  to  design mould following the mould  drawing.
    2.3 Mould  Making: After  the  mould  drawing  confirmed, we start the moulds and the  process including: prepare  steel,  rough  cut,  finish  machining,  assembly  etc.
    2.4 Mould  Test: we'll  test  the  mould  after  mould  assembly, send  customer  samples. We have machine factory by our own. It is easy and quick to test moulds.
    2.5 Final  Process: The  mould  start  to  polish  if  the  samples be  accept  and  make  grain,   nitridation  or  chroming  if  customer requirement
    2.6 Mould  Packing: We packing mould with  wooden  case.
3.  Our Company
    When it comes to innovative and full range of blow molding machines and molds, you need focus on no further than our TONVA machine in China, which established since 1993. TONVA's pioneering technologies, rich experience of our strong R&D team, and good service have allowed us to be one of the leaders of this plastic industrial for over 25years.
Our clients in a wide range of plastic industry sectors, such as: daily using, toy, chemical container, agrochemical, pharmaceuticals, automobile, food, traffic using etc., volume range from 3ml to 5000L, single layer to 6layers, single color to three colors, which are all available on TONVA machine production, clients from more than 80 countries, have to come rely on the knowledge and technologies of a brand which stand for both quality and reliability.Â
4. Contact us
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The glue with good performance also has a large change in melt viscosity with temperature. Specifically: when the use temperature rises above 150 degrees, the melt viscosity of the glue can be quickly reduced, so that the coating can maintain proper permeability; and when the temperature of the glue is lowered, the viscosity of the glue can quickly increase. , and quickly solidifies, thus ensuring the effect of rapid limb binding. Hot melt adhesives can maintain good permeability only if they have a suitable melt viscosity, which is very important for glue binding. But too low melt viscosity will cause insufficient amount of glue on the back of the book. The melting degree of hot melt adhesive is more suitable in the range of 4000-5000 centipoise. Good adhesion and penetration performance, that is, when the equipment is running at high speed, the glue must be able to quickly infiltrate the spine of the book, and have excellent cohesion, which can ensure "no wire drawing", and will not crack or fall apart after cooling. In order to achieve this goal, changing the composition of the glue is one aspect. The key is to improve the cohesion and toughness of the base resin, and to introduce strong adhesive force, hard quality, low melt viscosity into the composition, and when the temperature changes up and down, Resins that dissolve or set rapidly. Adhesives with good performance should also have good tensile strength. The phenomenon of loose pages, falling pages, and breaking during the use of adhesive books is directly related to the tensile strength of hot melt adhesives. The tensile strength is usually 20-30kg/cm2. Hot melt adhesives must have good elongation. The elongation at break is high, and the toughness of the hot melt adhesive is good; only with good toughness can the book not be easily broken. The elongation requirement is greater than 300%
Adhesive Binding,Hot Glue For Book Binding,Glue For Paper Binding,Book Binding Glue Spine
GUANGZHOU INTERNET WOOD GLUE MANUFACTURER CO. LTD. , https://www.iwghotmelt.com