一种压铸模具的超长型腔挤压结构
By employing a synergistic extrusion structure with coaxially disconnected left, right, and rear extrusion rods in an ultra-long cooling channel, the problem of insufficient extrusion rod strength is solved, achieving efficient casting forming and extrusion stability, reducing shrinkage cavities, and improving the sealing and heat dissipation efficiency of the cooling channel.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG WENCAN FOUNDRY RES INST CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the extrusion rods in ultra-long cooling channels have insufficient structural strength, making them prone to bending and damage when filled with molten metal at high pressure and high speed, thus failing to guarantee the quality of the castings.
The system uses a moving mold core and a fixed mold core to form an ultra-long channel cavity. The left and right extrusion rods are coaxially arranged and disconnected, leaving a solid casting section. The rear extrusion rod applies pressure to the middle solid casting section under the drive of the extrusion drive mechanism, and works with the left and right extrusion rods to extrude molten metal from the horizontal and vertical directions, forming an all-round pressure field.
It effectively reduces shrinkage defects in the cooling channel, improves the sealing and heat dissipation efficiency of the cooling channel, and ensures the forming quality of the casting and the structural stability of the extrusion rod.
Smart Images
Figure CN224508425U_ABST
Abstract
Claims
1. An overlength cavity extrusion structure of a die-casting mold, characterized by comprising: The device includes an ultra-long channel cavity formed by the closing of a moving mold core and a fixed mold core. The ultra-long channel cavity extends laterally, with a left extrusion rod extending into the left end and a right extrusion rod extending into the right end. The left and right extrusion rods are coaxially arranged and disconnected, resulting in a solid casting section located between the left and right extrusion rods within the ultra-long channel cavity. The left extrusion rod is mounted on a left core-pulling mechanism, and the right extrusion rod is mounted on a right core-pulling mechanism. The moving mold core has at least one rear extrusion rod extending from back to front into the solid casting section of the ultra-long channel cavity. The rear extrusion rod is driven by an extrusion drive mechanism to be extruded toward or away from the solid casting section.
2. The super-long cavity extrusion structure of a die casting mold according to claim 1, characterized by, The extrusion drive mechanism includes a first hydraulic cylinder mounted on the back plate of the moving mold frame, a sleeve mounted on the moving mold core for guiding the movement of the rear extrusion rod, and a pressure block for locking the position of the sleeve. The piston rod end of the first hydraulic cylinder is drivenly connected to the tail end of the rear extrusion rod.
3. The super-long cavity extrusion structure of a die casting mold according to claim 2, characterized by, The sleeve has a countersunk hole structure inside, and the countersunk part of the countersunk hole is located at the end closer to the solid casting section.
4. The super-long cavity extruding structure of a die casting mold according to claim 1, wherein Both the left and right extrusion rods include an extrusion section, a flow blocking section, a connecting section, and a stop tail section connected in sequence.
5. The ultra-long cavity extrusion structure of the die-casting mold according to claim 4, characterized in that, The extrusion sections of both the left and right extrusion rods have a draft taper, and the diameter of the free end of the extrusion section is less than 5 mm.
6. The super-long cavity extrusion structure of a die casting mold according to claim 5, wherein The distance between the left and right extrusion rods is less than 80 mm.
7. The super-long cavity extruding structure of a die casting mold according to claim 1, wherein The left core-pulling mechanism includes a left slide block slidably disposed on the moving mold frame, a left core-pulling slider detachably disposed on the end of the left slide block facing the moving mold core, and a first core-pulling drive mechanism for driving the left slide block and the left core-pulling slider closer to or further away from the moving mold core; the left extrusion rod is disposed on the left core-pulling slider, and the left slide block is provided with a left locking rod that acts on the stop head of the left extrusion rod.
8. The overlength cavity extrusion of a die casting mold according to claim 7, characterized in that, The first core-pulling drive mechanism includes a first U-shaped frame fixed on the side of the moving mold frame and a second hydraulic cylinder disposed on the first U-shaped frame. The piston rod end of the second hydraulic cylinder is connected to the left slide block through a connector.
9. The super-long cavity extruding structure of a die casting mold according to claim 1, wherein The right core-pulling mechanism includes a right slide block slidably disposed on the moving mold frame, a right core-pulling slider detachably disposed on the end of the right slide block facing the moving mold core, and a second core-pulling drive mechanism for driving the right slide block and the right core-pulling slider closer to or away from the moving mold core; the right extrusion rod is disposed on the right core-pulling slider, and the right slide block is provided with a right locking rod that acts on the stop head of the right extrusion rod.
10. The ultra-long cavity extrusion structure of the die-casting mold according to claim 9, characterized in that, The second core-pulling drive mechanism includes a second U-shaped frame fixed on the side of the moving mold frame and a third hydraulic cylinder mounted on the second U-shaped frame. The piston rod end of the third hydraulic cylinder is connected to the right slide block via a connector.