Disc type die-casting die core-pulling exhaust structure
By designing the core exhaust structure of the disc die-casting mold and using the exhaust disc and channel system, the problem of poor exhaust gas inside the product during the die-casting process is solved, and the product yield and exhaust effect are significantly improved.
Patent Information
- Application Number
- CN202421774504.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-25
AI Technical Summary
During the die-casting process, the bottom of the long core inside the product cannot be effectively exhausted, resulting in a high waste rate. The existing method of increasing slag bags still cannot meet the requirements.
A disc type die-cast mold core exhaust structure is designed, including a core pole body, a top seat, an exhaust disc and a tightening bolt. The gas is discharged through the exhaust passage, intake hole, air receiving hole and exhaust passage on the inner wall of the exhaust disc to achieve self-exhaustion.
It effectively enhances the exhaust effect of the mold when forming the product, reduces the pore defects caused by the hole air, and improves the product yield.
Smart Images
Figure CN222957478U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of die-casting molds, and specifically to a core-pulling and exhaust structure of a disc-type die-casting mold. Background Art
[0002] A die-casting mold is the main process equipment for producing die-castings. Its working principle is to fill the mold cavity with liquid or semi-liquid metal at an extremely high speed and solidify under pressure to obtain die-castings.
[0003] The die-casting process mainly includes the following steps:
[0004] Clamping: The mold is closed to form a cavity, a gating system, and an overflow and exhaust system.
[0005] Pouring: Pour the liquid metal into the mold cavity through the gate.
[0006] Injection: The die-casting machine injects the molten metal into the mold cavity at a high speed through the injection punch.
[0007] Cooling and solidifying: The molten metal cools and solidifies under pressure to form a die-casting.
[0008] Unclamping: The moving mold and the stationary mold are separated.
[0009] Ejecting: Eject the casting under the action of the ejecting mechanism.
[0010] When the product is die-cast and formed inside the die-casting mold, the bottom of the long core in the product cannot be effectively exhausted, and the conventional method of increasing slag pockets still cannot meet the requirements of the scrap rate. Content of the Utility Model
[0011] The purpose of the utility model is to provide a core-pulling and exhaust structure of a disc-type die-casting mold to solve the defects mentioned in the above background art.
[0012] To achieve the above purpose, a core-pulling and exhaust structure of a disc-type die-casting mold is provided, including a core-pulling rod body. A terminal rod is fixedly installed at the top of the core-pulling rod body, and a top seat covers the surface of the terminal rod. One end of the core-pulling rod body away from the terminal rod is fixedly connected to a tail shaft, and exhaust holes are opened on the outer side of the bottom of the core-pulling rod body. An air inlet hole is opened on the outer side of the top seat, and an air receiving hole is opened on the inner wall surface of the terminal rod. The size of the top seat is adapted to that of the exhaust disc, and the exhaust disc is sleeved on the outer side of the top seat. At the same time, a screw hole adapted to the size of the tightening bolt is opened inside the top seat, and the stud on the tightening bolt is screwed and fixed inside the screw hole.
[0013] Preferably, the exhaust disc is annularly arranged, and the exhaust disc is fixedly connected to the top of the core-pulling rod body through a tightening bolt. At the same time, eight groups of exhaust channels are evenly opened on the inner wall of the exhaust disc.
[0014] Preferably, eight groups of air receiving holes are evenly formed in the circumferential position on the inner wall surface of the end rod, and eight groups of air inlet holes are evenly formed in the circumferential position on the outer surface of the top seat.
[0015] Preferably, the eight groups of air inlet holes are communicated with the eight groups of air receiving holes, the cross-section of the air inlet holes is semicircular, the cross-section of the air receiving holes is also semicircular, and the diameters of the air inlet holes and the air receiving holes are the same.
[0016] Preferably, eight groups of exhaust channels are evenly formed inside the core pulling rod body, eight groups of exhaust holes are evenly arranged in the circumferential position at the bottom of the core pulling rod body, the exhaust channels are communicated with the exhaust holes, and the cross-sections of the exhaust channels and the exhaust holes are "L"-shaped.
[0017] Preferably, the air inlet holes are communicated with the exhaust holes through the air receiving holes and the exhaust channels, and the eight groups of air inlet holes, air receiving holes, exhaust channels and exhaust holes are combined together to form a core pulling exhaust system.
[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: The bubbles generated during the use of the mold can enter the interior of the air inlet holes from the exhaust channels on the inner wall of the exhaust disc. The gas inside the air inlet holes passes through the air receiving holes and the exhaust channels in sequence and is finally discharged through the exhaust holes, completing the exhaust operation of the stamping die during the product forming process, enhancing the exhaust effect, increasing the product yield, and effectively reducing the pore defects on the product caused by air entrapment. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a front view schematic diagram of the structure of the present utility model;
[0020] Figure 2 is a schematic diagram of the connection structure of the top seat of the structure of the present utility model;
[0021] Figure 3 is a schematic diagram of the installation of the tightening bolt and the exhaust disc of the structure of the present utility model;
[0022] Figure 4 is a schematic diagram of the tightening bolt of the structure of the present utility model;
[0023] Figure 5 is a schematic diagram of the exhaust disc of the structure of the present utility model;
[0024] Figure 6 is a plan view of the structure of the present utility model Figure 1 ;
[0025] Figure 7 is a schematic diagram of the structure of the present utility model Figure 6 in the C-C cross-sectional structure schematic diagram;
[0026] Figure 8 is a schematic diagram of the structure of the present utility model Figure 6Schematic diagram of the D-D sectional structure therein.
[0027] Reference numerals in the figure: 1, top seat; 11, air inlet hole; 2, end rod; 21, air receiving hole; 3, core-pulling rod body; 31, exhaust passage; 4, exhaust hole; 5, tail shaft; 6, tightening bolt; 7, exhaust disc. Specific implementation manner
[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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.
[0029] Please refer to Figures 1-8 , the present invention provides a core-pulling and exhaust structure for a disc-type die-casting mold, including a core-pulling rod body 3. The top of the core-pulling rod body 3 is fixedly installed with an end rod 2, and the surface of the end rod 2 is covered with a top seat 1. One end of the core-pulling rod body 3 far from the end rod 2 is fixedly connected to a tail shaft 5, and an exhaust hole 4 is opened on the outer side of the bottom of the core-pulling rod body 3. An air inlet hole 11 is opened on the outer side of the top seat 1, and an air receiving hole 21 is opened on the inner wall surface of the end rod 2; the top seat 1 is adapted to the size of the exhaust disc 7, and the exhaust disc 7 is sleeved on the outer side of the top seat 1. At the same time, a screw hole adapted to the size of the tightening bolt 6 is opened inside the top seat 1, and the stud on the tightening bolt 6 is screwed and fixed inside the screw hole.
[0030] Working principle: When in use, the core-pulling rod body 3 serves as a shot punch to press the molten metal into the mold cavity. During this process, the bubbles generated can enter the inside of the air inlet hole 11 from the exhaust passages on the inner wall of the exhaust disc 7. The gas inside the air inlet hole 11 passes through the air receiving hole 21 and the exhaust passage 31 in sequence and is finally discharged through the exhaust hole 4, completing the exhaust operation of the stamping mold during product forming, enhancing the exhaust effect, increasing the product yield; effectively reducing the pore defects on the product caused by air entrapment.
[0031] The exhaust disc 7 is arranged in a ring shape, and the exhaust disc 7 is fixedly connected to the top of the core-pulling rod body 3 through a tightening bolt 6. At the same time, eight groups of exhaust passages are evenly opened on the inner wall of the exhaust disc 7.
[0032] As a preferred implementation manner, eight groups of air receiving holes 21 are evenly opened on the circumferential position of the inner wall surface of the end rod 2, and eight groups of air inlet holes 11 are evenly opened on the circumferential position of the outer surface of the top seat 1.
[0033] Eight groups of air inlet holes 11 are communicated with eight groups of air receiving holes 21. The cross-section of the air inlet holes 11 is semicircular, and at the same time, the cross-section of the air receiving holes 21 is semicircular. The diameters of the air inlet holes 11 and the air receiving holes 21 are the same.
[0034] As a preferred embodiment, eight groups of exhaust channels 31 are uniformly arranged inside the core-pulling rod body 3, and eight groups of exhaust holes 4 are uniformly arranged at the circumferential position of the bottom of the core-pulling rod body 3. At the same time, the exhaust channels 31 are communicated with the exhaust holes 4, and the cross-sections of the exhaust channels 31 and the exhaust holes 4 are "L"-shaped.
[0035] The air inlet holes 11 are communicated with the exhaust holes 4 through the air receiving holes 21 and the exhaust channels 31. The eight groups of air inlet holes 11, air receiving holes 21, exhaust channels 31 and exhaust holes 4 are combined together to form a core-pulling exhaust system.
[0036] Although the embodiments of the present invention 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 invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A core-pulling exhaust structure for a disc-type die-casting mold, comprising a core-pulling rod body (3), characterized in that: The top of the core pulling rod body (3) is fixedly mounted with an end rod (2), and the surface of the end rod (2) covers the top seat (1); the end of the core pulling rod body (3) away from the end rod (2) is fixedly connected to the tail shaft (5), and an exhaust hole (4) is provided on the outer side of the bottom of the core pulling rod body (3), an air inlet hole (11) is provided on the outer side of the top seat (1), and an air receiving hole (21) is provided on the inner wall surface of the end rod (2); the size of the top seat (1) is matched with that of the exhaust disc (7), and the exhaust disc (7) is sleeved on the outer side of the top seat (1); at the same time, a screw hole matching the size of the tightening bolt (6) is provided inside the top seat (1), and the stud on the tightening bolt (6) is screwed and fixed inside the screw hole.
2. A disc-type die-casting mold core-pulling exhaust structure according to claim 1, characterized in that: The exhaust disc (7) is arranged in an annular shape, and is fixedly connected to the top of the core-pulling rod body (3) by tightening the bolts (6), and eight groups of exhaust ducts are evenly arranged on the inner wall of the exhaust disc (7).
3. The core-pulling exhaust structure of a disc-type die-casting mold according to claim 1, characterized in that: Eight groups of air receiving holes (21) are evenly arranged at circumferential positions on the inner wall surface of the end rod (2), and eight groups of air inlet holes (11) are evenly arranged at circumferential positions on the outer surface of the top seat (1).
4. A core-pulling exhaust structure for a disc-type die-casting mold according to claim 3, characterized in that: The eight groups of air inlet holes (11) are connected to the eight groups of air receiving holes (21), and the cross-section of the air inlet holes (11) is arranged in a semicircular shape, while the cross-section of the air receiving holes (21) is arranged in a semicircular shape, and the diameters of the air inlet holes (11) and the air receiving holes (21) are the same.
5. The core-pulling exhaust structure of a disc-type die-casting mold according to claim 1, characterized in that: Eight groups of exhaust channels (31) are evenly arranged inside the core-pulling rod body (3), and eight groups of exhaust holes (4) are evenly arranged at circumferential positions at the bottom of the core-pulling rod body (3). The exhaust channels (31) and the exhaust holes (4) are connected, and the cross-sections of the exhaust channels (31) and the exhaust holes (4) are arranged in an "L" shape.
6. The core-pulling exhaust structure of a disc-type die-casting mold according to claim 1, characterized in that: The air inlet (11) is connected to the exhaust hole (4) via the air receiving hole (21) and the exhaust channel (31), and eight groups of air inlet holes (11), air receiving holes (21), exhaust channels (31) and exhaust holes (4) are combined together to form a core-pulling exhaust system.