The history of injection mold development is intricately woven with the evolution of design and manufacturing techniques, showcasing a symbiotic relationship of mutual advancement and reliance. The ascent and prevalent application of injection molding technology are primarily attributed to technological advancements and systemic developments, coupled with the inherent demands of injection mold theory and design for the urgent implementation of such technologies.

With the advent of computer upgrades and the rapid evolution of computer graphics and technology from the 1960s to the 1970s, the landscape of injection molding witnessed significant technological strides. In the mid-1960s, numerous prominent corporations and academic institutions in the United States and the United Kingdom dedicated substantial human and material resources towards researching and developing this technology, culminating in the creation of numerous practical systems. Simultaneously, scholars from the UK, USA, and Canada conducted foundational research on plastic melt flow and cooling within mold cavities, establishing a one-dimensional flow mathematical model—a cornerstone for the systematic examination of injection molds.

Since 1972, a Canadian chemical engineering professor's research team has undertaken comprehensive studies on computer simulation, process control, and plastic performance testing in injection molding. Building upon these efforts, they developed an integrated computer simulation system for the injection molding process. Furthermore, another research group has delved deeply into injection molding technology since 1974, crafting one-, two-, and three-dimensional mathematical models for flow, pressure, and cooling in the process. They also conducted experimental research on the rheological properties and heat characteristics of plastic melts, formulating a mathematical model for flow path balance calculations. Over two decades of rigorous research and development, computer-aided technology for injection mold design has matured into practical application.

Currently, the market boasts several highly regarded software systems for injection mold design, notably including:

1. System by an Australian Company:
   This was the pioneering injection mold flow analysis software introduced in the 1970s, offering comprehensive capabilities such as flow analysis, cooling analysis, warpage analysis, shrinkage analysis, structural stress analysis, injection molding machine parameter optimization, gas-assisted injection molding analysis, plastic fiber orientation analysis, and automatic generation of medium-sized surfaces. It also includes thermoset plastic flow and fusion analysis.

2. System by Dinghan (USA):
   Another reputable system known for its robust features and capabilities.

3. System by a US Company (listed twice, assuming a typo and correcting to one mention):
   A versatile system with a strong parametric feature modeling function, complete with a dedicated mold design module for enhanced convenience and intuition in mold design.

4. System by a US Company (30-foot, assuming a typographical error for a specific company name):
   A general mechanical system leveraging advanced model parameterization for 3D product design. It boasts pioneering technology, coupled with potent finite element analysis and processing capabilities.

These systems continue to push the boundaries of injection mold design and manufacturing, underscoring the ongoing symbiotic relationship between technological advancements and the industry's inherent needs for innovation.