Local extrusion device in mold
The local extrusion device in the mold directly acts on the castings when the metal liquid is not completely hardened, which solves the air hole defects on complex structural parts, improving product quality and convenience of use.
Patent Information
- Application Number
- CN202422065605.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The prior art is difficult to effectively improve the air hole defects on parts with complex local structures, uneven wall thickness, huge wall thickness and far from the gate by adjusting the die-casting process parameters, especially the position of the slag bag and exhaust tank cannot be set.
The local extrusion device in the mold is adopted, and the oil cylinder and the extrusion mechanism directly act on the semi-solid castings when the metal liquid filling is not completely hardened after completion, increasing the local density to eliminate air hole defects.
It effectively solves the air hole defects, improves the leakage detection pass rate of die castings, and improves the portability and flexibility of the device.
Smart Images
Figure CN223056698U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of molds, in particular to a local extrusion device inside a mold. Background Art
[0002] A mold is various molds and tools used in industrial production for injection molding, blow molding, extrusion, die casting, forging, smelting, stamping and other methods to obtain the required products. In short, a mold is a tool for making formed articles. This tool is composed of various parts. Different molds are composed of different parts. It mainly realizes the processing of the outer shape of articles through the change of the physical state of the formed material, and is known as the "mother of industry".
[0003] In view of the problems of porosity and shrinkage cavity defects in castings, by modifying process parameters (such as molten aluminum temperature, switching positions of low-speed and high-speed points, die-casting pressure, etc.), modifying gate positions, adding slag pockets, adding high-pressure point cold pre-casting pins and other methods, the product qualification rate can be effectively improved. However, for some parts with complex local structures, uneven wall thicknesses, large differences in wall thicknesses, far distances from the gate at the thickest part, and the most distal position not on the parting surface where slag pockets and exhaust grooves cannot be set, only by adjusting die-casting process parameters, the defects cannot be improved. Content of the Utility Model
[0004] In view of the deficiencies of the prior art, the utility model provides a local extrusion device inside a mold, which solves the problem that for some parts with complex local structures, uneven wall thicknesses, large differences in wall thicknesses, far distances from the gate at the thickest part, and the most distal position not on the parting surface where slag pockets and exhaust grooves cannot be set, only by adjusting die-casting process parameters, the defects cannot be improved.
[0005] To achieve the above object, the utility model is realized through the following technical solutions: A local extrusion device inside a mold includes an oil cylinder. One side of the oil cylinder is provided with an extrusion mechanism, and the extrusion mechanism includes: a first extrusion pin connecting rod detachably connected to the output end of the oil cylinder; a second extrusion pin connecting rod arranged on one side of the first extrusion pin connecting rod; a fastening nut installed at one end of the second extrusion pin connecting rod; an extrusion pin gasket arranged on one side of the fastening nut; an extrusion pin threadedly connected to the inner wall of the fastening nut and sequentially movably connected to the inner walls of the second extrusion pin connecting rod and the extrusion pin gasket; a limiting part arranged on one side of the second extrusion pin connecting rod. Among them, the oil cylinder changes the position of the extrusion pin through the first extrusion pin connecting rod and the second extrusion pin connecting rod, and the limiting part limits the positions of the extrusion pin gasket, the fastening nut and the extrusion pin.
[0006] Preferably, a pressing plate is fixedly connected to the end of the extrusion pin through a bolt.
[0007] Preferably, an extrusion pin sheath is arranged on the outer wall of the extrusion pin.
[0008] Preferably, the limiting part includes: a lock washer installed at one end of the extrusion pin gasket and abutted against the outer wall of the fastening nut; two limiting rods, both of which are movably connected to the inner wall of the extrusion pin gasket and are also movably connected to the inner wall of the fastening nut; two springs, respectively sleeved on the outer walls of the two limiting rods and fixedly connected to the inner wall of the extrusion pin gasket; wherein, the springs drive the limiting rods to insert into the inner wall of the fastening nut.
[0009] Preferably, an adjusting part is arranged on one side of the oil cylinder. The adjusting part includes: a threaded rod rotatably connected to the inner wall of the second extrusion pin connecting rod through a bearing and threadedly connected to the inner wall of the first extrusion pin connecting rod; a cross bar installed on the outer wall of the second extrusion pin connecting rod and movably connected to the inner wall of the first extrusion pin connecting rod; wherein, twisting the threaded rod drives the cross bar to move along the inner wall of the first extrusion pin connecting rod so as to change the positions of the first extrusion pin connecting rod and the second extrusion pin connecting rod.
[0010] Beneficial effects
[0011] The utility model provides a local extrusion device inside a mold. It has the following beneficial effects: through the cooperation of the oil cylinder and the extrusion mechanism, after the metal liquid filling is completed and the product has not been completely hardened, the pressure can be directly applied to the semi-solid casting, increasing the local density of the extrusion to achieve the purpose of eliminating pore defects. In the case where the pore defects cannot be effectively improved by measures such as improving the production process and adding point cooling to the pins, using local extrusion can effectively solve the local pore defects of the product and improve the passing rate of the pressure die-casting leakage detection;
[0012] Through the cooperation of the adjusting part, the overall volume of the local extrusion device inside the mold can be changed. Therefore, its portability can be improved, and the use flexibility is also improved, thus bringing convenience to the use of the staff. Description of the drawings
[0013] Figure 1 is a schematic structural diagram of the utility model;
[0014] Figure 2 is Figure 1 a sectional view of
[0015] Figure 3 is Figure 2 a schematic structural diagram of the extrusion pin gasket, the spring and the limiting rod in
[0016] Figure 4 is Figure 2 a schematic structural diagram of the threaded rod, the cross bar and the second extrusion pin connecting rod in
[0017] In the figure: 1. Oil cylinder; 2. Extrusion mechanism; 21. First extrusion pin connecting rod; 22. Second extrusion pin connecting rod; 23. Extrusion pin; 231. Pressure plate; 24. Limiting part; 241. Limiting rod; 242. Spring; 243. Lock washer; 25. Fastening nut; 26. Extrusion pin gasket; 3. Extrusion pin sheath; 4. Adjusting part; 41. Threaded rod; 42. Cross bar. Detailed implementation mode
[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0019] Through those skilled in the art, the components in this case are connected in sequence. For the specific connection and operation sequence, reference should be made to the following working principle. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process.
[0020] Regarding the problems of porosity and shrinkage cavity defects in castings, by modifying process parameters (such as molten aluminum temperature, switching position of low-speed and high-speed points, die-casting pressure, etc.), modifying the gate position, adding slag pockets, adding high-pressure point cold pre-casting pins, etc., the product qualification rate can be effectively improved. However, for some parts with complex local structures, uneven wall thicknesses, and large differences in wall thicknesses far from the gate, and the most distal position not on the parting surface where slag pockets and exhaust grooves cannot be set, only by adjusting die-casting process parameters, the defects cannot be improved;
[0021] In view of this, the present invention provides a local extrusion device inside a mold. Through the cooperation of an oil cylinder and an extrusion mechanism, after the metal liquid is filled, when the product has not completely hardened, the pressure can be directly applied to the semi-solid casting to increase the local density of the extrusion, so as to achieve the purpose of eliminating porosity defects. In the case where the porosity defects cannot be effectively improved by improving production processes and adding point cooling to pins, etc., using local extrusion can effectively solve the local porosity defects of the product and improve the passing rate of the pressure leakage detection of die-castings.
[0022] Embodiment 1: Consisting of Figure 1 , 2As can be seen from FIGS. 3 and 4, a local extrusion device within a mold includes an oil cylinder 1. On one side of the oil cylinder 1, there is an extrusion mechanism 2, and the extrusion mechanism 2 includes: a first extrusion pin connecting rod 21 detachably connected to the output end of the oil cylinder 1; a second extrusion pin connecting rod 22 disposed on one side of the first extrusion pin connecting rod 21; a fastening nut 25 installed at one end of the second extrusion pin connecting rod 22; an extrusion pin gasket 26 disposed on one side of the fastening nut 25; an extrusion pin 23 threadedly connected to the inner wall of the fastening nut 25 and sequentially movably connected to the inner walls of the second extrusion pin connecting rod 22 and the extrusion pin gasket 26; a limiting portion 24 disposed on one side of the second extrusion pin connecting rod 22. Among them, the oil cylinder 1 changes the position of the extrusion pin 23 through the first extrusion pin connecting rod 21 and the second extrusion pin connecting rod 22, and the limiting portion 24 restricts the positions of the extrusion pin gasket 26, the fastening nut 25, and the extrusion pin 23.
[0023] In the specific implementation process, it is particularly worth noting that the model of the oil cylinder 1 is not restricted, as long as it meets the usage requirements. The oil cylinder 1 can provide power for this local extrusion device within the mold, and thus can drive the extrusion pin 23 to process the workpiece. The limiting portion 24 can limit the extrusion pin gasket 26 and the fastening nut 25, so the usage stability can be ensured. Moreover, the cross-section of the extrusion pin 23 on the side close to the spring 242 inside the extrusion pin gasket 26 is rectangular, so the positional relationship between the extrusion pin 23 and the extrusion pin gasket 26 can be ensured. The staff can install the oil cylinder 1 at a suitable position, and its installation method and installation position are not restricted, subject to meeting the actual usage requirements, so no more details will be given here. Those skilled in the art should understand it in a broad sense.
[0024] Furthermore, a pressing plate 231 is fixedly connected to the end of the extrusion pin 23 by bolts.
[0025] In the specific implementation process, it is particularly worth noting that the pressing plate 231 can increase the contact area between the extrusion pin 23 and the metal workpiece, and avoid the phenomenon that the metal workpiece is damaged and deformed due to excessive local pressure.
[0026] Furthermore, an extrusion pin sheath 3 is disposed on the outer wall of the extrusion pin 23.
[0027] In the specific implementation process, it is particularly worth noting that the extrusion pin sheath 3 can protect the extrusion pin 23.
[0028] Further, the limiting part 24 includes: a lock washer 243, installed at one end of the extrusion pin gasket 26 and abutted against the outer wall of the fastening nut 25; two limiting rods 241, both movably connected to the inner wall of the extrusion pin gasket 26 and both movably connected to the inner wall of the fastening nut 25; two springs 242, respectively sleeved on the outer walls of the two limiting rods 241 and both fixedly connected to the inner wall of the extrusion pin gasket 26; wherein, the spring 242 drives the limiting rod 241 to insert into the inner wall of the fastening nut 25;
[0029] In the specific implementation process, it is particularly worth noting that the material of the lock washer 243 is not limited as long as it meets the usage requirements. When the spring 242 is compressed, it will give a reverse force to the limiting rod 241, so that the limiting rod 241 can be inserted into the inner wall of the fastening nut 25, so as to avoid the reverse loosening phenomenon of the extrusion pin 23;
[0030] Specifically, when using the local extrusion device in the mold, the staff turns on the external power supply of the oil cylinder 1, and the oil cylinder 1 can drive the extrusion pin 23 to move through the first extrusion pin connecting rod 21 and the second extrusion pin connecting rod 22 through the fastening nut 25 and the extrusion pin gasket 26. At this time, the pressing plate 231 can press the workpiece, and then the workpiece can be processed. When disassembly is required, the staff pulls the limiting rod 241. At this time, the limiting rod 241 compresses the spring 242. When the limiting rod 241 leaves the inner wall of the fastening nut 25, the staff can twist the extrusion pin 23, and then the disassembly work can be carried out.
[0031] Embodiment 2: From Figure 1 、 2 and 4, it can be seen that an adjustment part 4 is arranged on one side of the oil cylinder 1. The adjustment part 4 includes: a threaded rod 41, rotatably connected to the inner wall of the second extrusion pin connecting rod 22 through a bearing and threadedly connected to the inner wall of the first extrusion pin connecting rod 21; a cross bar 42, installed on the outer wall of the second extrusion pin connecting rod 22 and movably connected to the inner wall of the first extrusion pin connecting rod 21; wherein, twisting the threaded rod 41 drives the cross bar 42 to move along the inner wall of the first extrusion pin connecting rod 21, so as to change the positions of the first extrusion pin connecting rod 21 and the second extrusion pin connecting rod 22;
[0032] In the specific implementation process, it is particularly worth noting that the cross bar 42 can limit the first extrusion pin connecting rod 21 and the second extrusion pin connecting rod 22, and twisting the threaded rod 41 can change the positions of the first extrusion pin connecting rod 21 and the second extrusion pin connecting rod 22, so as to change the overall layout of the local extrusion device in the mold;
[0033] Specifically, based on the first embodiment above, when it is necessary to change the overall layout of the local extrusion device in the mold, the staff twists the threaded rod 41. The threaded rod 41 can change the positions of the first extrusion pin connecting rod 21 and the second extrusion pin connecting rod 22, and then drive the cross bar 42 to move along the inner wall of the first extrusion pin connecting rod 21. At this time, the overall layout of the local extrusion device in the mold can be changed.
[0034] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation. An element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.
[0035] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "rotation connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0036] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. A local extrusion device inside a mold, comprising an oil cylinder (1), characterized in that: On one side of the oil cylinder (1), an extrusion mechanism (2) is provided, and the extrusion mechanism (2) includes: The first extrusion pin connecting rod (21) is detachably connected to the output end of the oil cylinder (1); The second extrusion pin connecting rod (22) is arranged on one side of the first extrusion pin connecting rod (21); The fastening nut (25) is installed at one end of the second extrusion pin connecting rod (22); The extrusion pin gasket (26) is arranged on one side of the fastening nut (25); The extrusion pin (23) is threadedly connected to the inner wall of the fastening nut (25) and is sequentially and movably connected to the inner walls of the second extrusion pin connecting rod (22) and the extrusion pin gasket (26); The limiting part (24) is arranged on one side of the second extrusion pin connecting rod (22); Wherein, the oil cylinder (1) changes the position of the extrusion pin (23) through the first extrusion pin connecting rod (21) and the second extrusion pin connecting rod (22), and the limiting part (24) limits the positions of the extrusion pin gasket (26), the fastening nut (25) and the extrusion pin (23).
2. The local extrusion device within a mold according to claim 1, wherein: The end of the extrusion pin (23) is fixedly connected with a pressing plate (231) through a bolt.
3. The local extrusion device within a mold according to claim 1, characterized in that: An extrusion pin sheath (3) is arranged on the outer wall of the extrusion pin (23).
4. A local extrusion device inside a mold according to claim 1, characterized in that: The limiting part (24) includes: The lock washer (243) is installed at one end of the extrusion pin gasket (26) and abuts against the outer wall of the fastening nut (25); Two limiting rods (241) are arranged and are both movably connected to the inner wall of the extrusion pin gasket (26) and are both movably connected to the inner wall of the fastening nut (25); Two springs (242) are arranged, respectively sleeved on the outer walls of the two limiting rods (241) and are both fixedly connected to the inner wall of the extrusion pin gasket (26); Wherein, the spring (242) drives the limiting rod (241) to insert into the inner wall of the fastening nut (25).
5. The local extrusion device within a mold according to claim 1, characterized in that: On one side of the oil cylinder (1), an adjustment part (4) is provided, and the adjustment part (4) includes: The threaded rod (41) is rotatably connected to the inner wall of the second extrusion pin connecting rod (22) through a bearing and is threadedly connected to the inner wall of the first extrusion pin connecting rod (21); The cross bar (42) is installed on the outer wall of the second extrusion pin connecting rod (22) and is movably connected to the inner wall of the first extrusion pin connecting rod (21); Wherein, twisting the threaded rod (41) drives the cross bar (42) to move along the inner wall of the first extrusion pin connecting rod (21) so as to change the positions of the first extrusion pin connecting rod (21) and the second extrusion pin connecting rod (22).