GasIn

Gas assisted injection molding process is to inject compressed inert gas into the polymer melt through the runner or any designed gas channel. Moldex3D/Shell-GasIn provides a simulation tool to analyze the dynamics of gas-assisted injection molding process. It is capable of simulating the plastics filling and packing, gas injection, mold cooling, fiber orientation and part warpage.

With complete analysis capabilities, Moldex3D/Shell-GasIn allows users to evaluate the gas flow front, gas blow-through, final wall thickness, part warpage… to further optimize gas entrance locations, gas channel layout, gas injection timing and part design.

Capabilities
Moldex3D/Shell-GasIn allows you to

	Predict the gas flow front to see the gas penetration
	Predict gas blow-through behavior
	Predict final wall thickness due to gas injection
	Predict weld line locations to minimize or eliminate them
	Predict air trap locations
	Determine proper shot size to avoid gas blowout
	Determine proper gas pressure to avoid short shots
	Check poor gas penetration areas
	Optimize the gas entrance location and gas channel layout to achieve balanced gas flow and control gas penetration
	Optimize process conditions in filling stage, such as gas injection timing, delay time, gas pressure, melt temperature, ram speed profile, etc
	Evaluate the influence of gas injection in mold cooling to optimize mold cooling design
	Evaluate the influence of gas injection in part warpage

Features

	Link to Shell-Flow to
	Predict the gas flow front to see the gas penetration.
	Predict the melt front advancement
	Predict the injection pressure and evaluate the required clamping force
	Predict weld line locations to minimize or eliminate them
	Predict air trap locations
	Predict gas blow-through behavior
	Predict final wall thickness due to gas injection
	Determine proper shot size to avoid gas blowout
	Determine proper gas pressure to avoid short shots
	Evaluate the runner layout and type to minimize the volume of material and achieve runner balancing
	Optimize the gate location and size to minimize weld lines and achieve balanced filling
	Optimize the gas entrance location and gas channel layout to achieve balanced gas flow and control gas penetration
	Optimize process conditions in filling stage, such as gas injection timing, delay time, gas pressure, melt temperature, ram speed profile, etc
	Simulate filling process for multi-cavity molds or family molds
	Link to Shell-Pack to
	Predict the required clamping force in packing stage
	Predict areas of high volumetric shrinkage
	Evaluate gate design and estimate gate freeze time
	Optimize process conditions in packing stage, such as packing time, packing pressure, VP switch, etc
	Evaluate the design parameters for the revision or optimization of design
	Link to Shell-Cool to
	Evaluate the influence of gas injection in mold cooling to optimize mold cooling design
	Predict temperature in part, runner, cooling channels, inserts, etc
	Evaluate the efficiency of cooling system design, including cooling circuits, inserts, mold base, heating rod, etc
	Minimize unbalanced cooling problem
	Determine the required cooling cycle time
	Optimize mold cooling system design to achieve optimum cooling efficiency with the minimum cycle time
	Link to Shell-Warp to
	Evaluate the influence of gas injection in part warpage
	Predict final part shape before actual molding
	Predict sink marks
	Evaluate unbalanced cooling effect
	Evaluate material orientation effect
	Evaluate in-mold constraint effect
	Evaluate orientation induced anisotropic material properties
	Query any two points to determine the linear shrinkage ratio
	Define the reference plane for better measurement of deflection
	Separate total displacement into x-axis, y-axis, and z-axis displacements to show the deformation in each direction
	Export warpage shape in STL format
	Export inverse warpage shape in STL format
	Evaluate both single cavity and multi-cavity molds
	Link to Shell-Fiber to
	Predict fiber orientation distribution and average fiber orientation
	Predict elastic modulus distribution and average elastic modulus
	Predict linear thermal expansion coefficient (CLTE) distribution and average CLTE
	Composite property calculation based on exist models
	Output anisotropic thermo-mechanical properties through Moldex3D/Shell-I2 (Additional Shell-I2 modules are required)