T-slot mainly uses in injection molding machines for functions such as core pulling, demolding, and flow separation in mold design, which can improve the efficiency and molding quality of the mold. It usually use in conjunction with T-mold technology to achieve more complex mold structures and forming requirements. In addition, the design and manufacturing of T-slots need to consider the accuracy, materials, and processing technology of the molds to ensure their stability and reliability during the injection molding process.
When choosing a T-slot for an injection molding machine, you need to consider multiple factors, including mold design, injection molding process, and equipment performance.
- Design and application of T-slots
- T-slot size and specifications
- Material selection for T-slots
- The role of T-slots in injection molding
- Consider choosing an injection molding machine
Design and application of injection molding machine T-slots
T-slots are a common mold structure. And their design usually uses to achieve rapid assembly and disassembly of molds and efficient production. For example, in some injection molds, T-slots use in the demoulding design of the inner slide structure. Through the conversion of the side slope force of the T-slot, the slider moves inward, thereby completing the demoulding of the molded plastic part.
Mold fixing system Structural design
The T-shaped groove integrates onto the clamping plate of the injection molding machine and locked by a T-shaped bolt passing through the mold cushion block
Template structure reinforcement European high rigidity template
Templates designed with T-shaped slots have
- Higher durability: Optimized structure to reduce deformation, parallelism error<0.1mm/m.
- Locking force repeatability accuracy: ± 1.5%, ensuring product size consistency
Auxiliary equipment integration
- security protection framework: T-shaped groove aluminum profiles are used to construct machine fences to prevent personnel from coming into contact with high-temperature components.
- Installation of sensors and actuators: Such as conveyor belt brackets, labeling machine bases, etc., support quick disassembly and assembly.
In addition, T-slots also use in the ejection mechanism, cooling system, and lateral parting. And also in core pulling mechanism of the mold to improve the stability and functionality of the mold.
T-slot size and specifications
When choosing a T-slot, you need to pay attention to its specific size and specifications. For example, parameters such as the head height, waist height and overhang height of the T-slot directly affect the assembly and use of the mold. According to evidence, the head height of the T-slot is usually 4.6 mm, the waist height is 4.9 mm, and the overhang height is 9.7 mm.
The common size standards for T-slots in injection molding machines vary depending on the application scenario and manufacturer, but the following are some common size parameters:
Slot width (a)
usually between 6mm and 50mm, depending on the type and purpose of the T-shaped slot. For example, when the T-shaped groove size is 10mm, the groove width is 15mm; when the size is 12mm, the groove width is 18mm; when the size is 14mm, the groove width is 22mm.
Groove depth (e)
The groove depth is usually between 6mm and 28mm, depending on the type and purpose of the T-shaped groove. For example, when the T-shaped groove size is 10mm, the groove depth is 12mm; when the size is 12mm, the groove depth is 14mm; when the size is 14mm, the groove depth is 16mm.
Slot height (h)
The slot height is usually between 6mm and 14mm, depending on the model and purpose of the T-shaped slot. For example, when the T-shaped groove size is 10mm, the groove height is 6mm; when the size is 12mm, the groove height is 7mm; when the size is 14mm, the groove height is 8mm.
These parameters need to be adjusted according to the actual mold design requirements.
Material selection for injection molding machine T-slots
The material selection for T-slots must meet the strength and durability requirements of the mold. For example, AISI 1045 steel often uses to make injection molds due to its good hardness and toughness. Through surface heat treatment, the hardness of AISI 1045 steel can reach 55HRC, thus meeting the needs of high-strength injection molds.
Steel
This is the most common T-groove material, including carbon steel, hot-rolled steel, cast steel, etc. For example, galvanized steel (StZn) is commonly used for lightning protection grounding and potential balancing installation. In addition, T-shaped groove nuts and bolts are usually made of heat-treated steel, which has good strength and wear resistance.
In heavy-duty or precision applications, alloy steels such as S355J2 steel or 42CrMo4 steel may also be used.
Aluminum
Aluminum profiles are widely used in industrial manufacturing and automation equipment due to their lightweight, high strength, and good processing performance. For example, T-shaped groove aluminum profiles are used for robot arms, automated production lines, etc
In addition, the surface of aluminum profiles is usually polished to improve their corrosion resistance and aesthetics.
Stainless steel
In highly corrosive environments, stainless steel materials may be used for T-slots. For example, stainless steel materials such as S30408, S30403, S31608 are suitable for different corrosion levels (C3, C4, C5)
In addition, T-groove nuts can also be made of stainless steel 1.4305.
Cast iron
Grey cast iron (GJL 300) is commonly used in tooling plates and fixtures, with good wear resistance and machinability
In addition, cast iron materials are also commonly used in T-groove machining, especially in situations where high hardness and wear resistance are required
The role of choosing injection molding T-slots
T-slots are mainly used in injection molding for quick assembly and disassembly of molds and efficient production. For example, T-mold molding technology uses the idle time (cooling time) in the injection molding cycle to achieve alternate opening and closing of the mold, thereby improving equipment utilization efficiency.
T-slots serve as structural anchoring points on the injection molding machine’s platen (the large metal plate that holds the mold). Their design allows for:
Secure Mold Fixation
T-bolts slide into the T-slots and lock molds in place through nuts and washers. This system withstands high clamping forces (up to 320 kN in specialized anchors) during injection.
Precision Alignment
The standardized dimensions of T-slots (e.g., width 30mm, depth 36mm) ensure consistent positioning, reducing misalignment risks.
Vibration Resistance
The inverted “T” shape prevents bolts from loosening under cyclic machine vibrations, critical for maintaining mold stability during high-pressure injection.
echnology is particularly suitable for technical parts with short production cycles, the same materials or paired combinations.
Consider choosing an injection molding machine
When choosing an injection molding machine, you need to consider whether it supports the design requirements of the T-slot. For example, a hydraulic full-closed-loop control injection molding machine usually equip with a temperature measurement function. It can better control the mold temperature and injection quality. In addition, the clamping force and injection speed of the injection molding machine must also match the design of the T-slot to avoid mold damage or molding defects.
From above all, when selecting the T-slot of an injection molding machine, you need to comprehensively consider its design specifications. And also it’s material selection, processing accuracy, and compatibility with the injection molding process. By rationally selecting and optimizing the design and application of the T-slot, you can significantly improve the performance and production efficiency of the mold.
