Moldex3D Broadens Co-injection Molding Simulation Capabilities in R11

The challenge of using co-injection molding process lies in the undefined interface between 1st shot (skin) and 2nd shot (core) material. After the core enters the cavity, there are two materials flowing at the same time inside the cavity. The skin/core distribution is thus determined by the flow behavior of each material, not by the cavity design alone! This unique feature of co-injection process poses difficulties for product designers and process engineers. Without proper analysis tools, molders struggle to optimize the gate location and to maximize the core content.

Based on its successful 3D simulation techinique in the Gas and Water Assisted Injection Molding, Moldex3d R11 provides complete solution for the Co-Injection Process with benefits as follows:

• Design changes of gate location can now easily be verified to ensure proper skin/core distribution.
• Skin thickness results are provided; even assymetric distribution of skin material such as common cornering effect can be estimated.
• The core penetration location helps designers maximize the core content. For the controlled breakout process, the core melt front evolution after penetration can also be simulated.
• The effects of varying processing conditions such as skin/core injection speeds, temperatures, and even delay times are all incorporated into calculation.
• Warpage prediction is based on the skin/core distribution in the product and their relative stiffness. The elemental stiffness information can further be used for the built-in stress solver or even output to other structural analysis software.
• Material wizard provides material comparison tool to match rheological properties such as processing winodws and shear rate dependent viscosities. PVT behavior can also be matched to prevent severe warpage caused by asymmetric shrinkage due to uneven skin/core material distribution.

The steps of comparing material properties can be found out in the Tips and Tricks session in this issue. 

Fig. 1  The 3-dimensional distribution of skin and core material inside the cavity

 Fig. 2  The skin thickness prediction of a multiple-gate large door panel component

 Fig. 3  The prediction of the location and core content when breakthrough happens.
The core melt front evolution after break through can also be simulated

Block Making Machine

Concrete block making machine is a professional production of concrete products brick making and molding equipment, It usually consists of hopper, mixer, vibrating table and forming mold and other components. The operator puts the concrete raw materials into the hopper, the mixer mixes the raw materials evenly, and then vibrates the concrete through the vibrating table, and forms it into the shape of blocks with the help of the forming mold. Finally, after a certain period of curing, the concrete blocks can be taken out of the molding machine for subsequent processing and use. According to the size of the output to choose different models of block molding machine, according to the scale of investment can be selected from simple type, optimized type, selected type, semi-automatic configuration, fully automatic configuration and other block molding machine brick production line.

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Zhengzhou XinFeng machinery manufacturing Co. Ltd , https://www.xfmachinery.com