Rapid exhausting die for die-casting forming of thin-wall structural part
By setting the slag bag and exhaust tank one in the mold to increase the total cross-sectional area of the exhaust tank, the problem of poor surface and poor internal filling in the thin-wall structure of the communication equipment shell during the aluminum alloy die-casting process is solved, and higher quality castings and longer-life molds are achieved.
Patent Information
- Application Number
- CN202421966805.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The thin-wall structure and complex shape of the outer shell of the communication equipment are prone to problems such as poor surface and insufficient filling of the inner ribs during the die-casting process of aluminum alloy.
A fast exhaust mold is designed. By setting several slag packets in the mold and combining the exhaust tank one, the total cross-sectional area of the exhaust tank is increased, thereby accelerating the gas discharge in the liquid aluminum filling cavity.
It effectively reduces the defects caused by die-casting cold partitions on the appearance of the castings, as well as poor filling of the ribs, and improves the quality of the castings and the service life of the mold.
Smart Images
Figure CN222944481U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of aluminum alloy die-casting, and particularly relates to a quick exhaust mold for die-casting of thin-walled structural parts. Background Art
[0002] The primary function of the communication equipment casing is to provide physical protection for sensitive electronic components inside to prevent damage caused by falling, impact or pressure. With the rapid development of the communication electronics industry and the popularization of the trend of lightweight equipment, the structure of communication equipment has been further thinned and optimized to ensure the portability of the equipment while maintaining durability, resulting in the thinning and complexity of the communication equipment structure.
[0003] The shells of this type of communication equipment are basically made of aluminum alloy die-casting, and the appearance parts have high requirements on the outer surface. However, the complex structure and thin wall thickness bring many difficulties to the die-casting of aluminum alloy, which is prone to problems such as poor surface quality and incomplete filling of internal ribs. Utility Model Content
[0004] The purpose of the utility model is to provide a mold with rapid exhaust for die-casting of thin-walled structural parts. By setting up a plurality of slag bags and matching them with exhaust grooves, the gas can enter the exhaust groove through the exhaust groove and then be discharged. The exhaust area of the mold is increased from 10%-20% of the conventional gate area to 20%-30%, so that the gas in the process of aluminum liquid filling the cavity can be quickly discharged, thereby reducing the defects of the casting appearance caused by the die-casting cold shut and the problem of poor filling at the ribs, and solving the problem that the existing complex structure and thin wall thickness bring many difficulties to the die-casting of aluminum alloys, and are prone to surface defects and incomplete filling of internal ribs.
[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:
[0006] The utility model discloses a mold for quick exhaust for die-casting of thin-walled structural parts, comprising a rear mold frame bottom plate, a support block is fixedly connected to the top of the rear mold frame bottom plate, a rear mold frame is fixedly connected to the top of the support block, a core pulling and resetting mechanism is arranged on the right side of the rear mold frame, the top of the rear mold frame contacts the front mold frame, a plurality of ejector pins are arranged below the rear mold frame, the number of the support blocks is two, and the two support blocks are symmetrically arranged, a rear mold core is arranged inside the rear mold frame, a slag bag is arranged on the top of the rear mold core, an exhaust groove 1 is arranged at the position of the top of the rear mold core near the slag bag, and an air outlet groove is arranged on the back of the rear mold core. The utility model arranges the exhaust groove 1, specifically, arranges a plurality of slag bags and matches the exhaust groove 1, so that the gas can enter the air outlet groove through the exhaust groove 1 and then be discharged, and solves the problem of quick exhaust of the mold by increasing the total cross-sectional area of the exhaust groove 1 (20%-30% of the gate area), reduces the defects of the casting appearance caused by the die-casting cold shut, and reduces the problem of poor filling at the ribs.
[0007] Furthermore, the bottom of the front mold frame contacts the front mold core, the top of the front mold core is provided with a threaded hole, the inner wall of the threaded hole is threadedly connected with a locking screw, the top of the front mold frame is provided with a hole groove, the inner wall of the hole groove contacts a gate sleeve, the four corners of the top of the rear mold frame are provided with guide column holes, the inner walls of the four guide column holes contact guide columns, and the back of the front mold core is fixedly connected with an exhaust plate one, the number of the exhaust plates one is two, and the two exhaust plates one are symmetrically arranged with the front mold core as the center. The utility model arranges a gate sleeve, specifically, the required casting aluminum liquid flows into the L-shaped flow channel through the gate. The L-shaped flow channel can play a buffering role when the aluminum liquid is filled, which is not only conducive to exhaust and reducing casting defects, but also can reduce the erosion force on the mold gate, and can effectively improve the service life of the mold without turning on the boost pressure, improve the die-casting yield rate of communication equipment housing castings, reduce scrapping, and thus reduce the cost of die-casting production.
[0008] Furthermore, an L-shaped flow channel is provided on the top of the mold, a pinhole is provided on the inner wall of the L-shaped flow channel, the number of the exhaust grooves is several, the number of the slag bags is several, and the several slag bags are arranged in a vertical array. The arrangement of the slag bags reduces the cold shut of the casting and the problem of poor filling at the ribs, thereby ensuring the quality of the casting.
[0009] Furthermore, a second exhaust plate is fixedly connected to the back side of the rear mold core, a second exhaust groove is provided on the top of the second exhaust plate, and the number of the second exhaust grooves is several, and the several second exhaust grooves are arranged in a horizontal array. The arrangement of the second exhaust plate allows gas to be discharged through it, thereby increasing the total exhaust cross-sectional area (20%-30% of the gate area) and solving the problem of poor exhaust.
[0010] Furthermore, the exhaust plate 2 is adapted to the exhaust plate 1, and the number of the exhaust plates 2 is two. The two exhaust plates 2 are symmetrically arranged with the mold as the center, and the top of the exhaust plate 2 is in contact with the bottom of the exhaust plate 1. The adaptation of the exhaust plate 1 and the exhaust plate 2 increases the exhaust volume of the exhaust groove 2, which solves the exhaust problem and also avoids the safety problem of aluminum liquid splashing out of the exhaust groove during high-speed injection production.
[0011] Furthermore, a core pulling mechanism is fixedly connected to the top of the rear mold frame, a latch is in contact with the right side of the core pulling mechanism, a core pulling mechanism is fixedly connected to the left side of the core pulling mechanism, and the left side of the core pulling mechanism is in contact with the right side of the rear mold core. By adopting the core pulling method and through reasonable layout design, the subsequent machining process and the investment in corresponding tooling can be effectively saved, thereby effectively saving production costs.
[0012] The utility model has the following beneficial effects:
[0013] 1. The utility model provides an exhaust groove 1, specifically, a plurality of slag bags are provided in combination with the exhaust groove 1, so that the gas can enter the exhaust groove through the exhaust groove 1 and then be discharged. The exhaust problem of the mold is solved by increasing the total cross-sectional area of the exhaust groove 1 (20%-30% of the gate area), reducing the defects of the casting appearance caused by the die casting cold shut and the problem of poor filling at the ribs.
[0014] 2. The utility model sets a gate sleeve, specifically, allows the required molten aluminum to flow into the L-shaped flow channel through the gate. The L-shaped flow channel can play a buffering role when the aluminum liquid is filled, which is not only conducive to exhaust and reduces casting defects, but also can reduce the erosion force on the mold gate. It can also effectively increase the service life of the mold without turning on the boost pressure, improve the die-casting yield of the communication equipment housing casting, reduce scrapping, and thus reduce the cost of die-casting production.
[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for describing the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 This is a schematic diagram of the structure of the support block of the utility model;
[0018] Figure 2 This is a schematic diagram of the L-shaped flow channel structure of the utility model;
[0019] Figure 3This is a schematic diagram of the slag bag structure of the utility model;
[0020] Figure 4 For this utility model Figure 3 A is a schematic diagram of the enlarged structure of the middle part;
[0021] Figure 5 It is a schematic diagram of the core-pulling structure of the utility model.
[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0023] 1. Rear mold base plate; 11. Support block; 12. Rear mold base; 121. Core-pulling reset mechanism; 13. Front mold base; 14. Ejector; 2. Front mold core; 21. Locking screw; 22. Gate sleeve; 221. L-shaped runner; 23. Guide column; 24. Exhaust plate 1; 3. Rear mold core; 31. Slag bag; 32. Exhaust groove 1; 33. Ejector hole; 4. Exhaust plate 2; 41. Exhaust groove 2; 42. Exhaust groove; 5. Core-pulling mechanism; 51. Core-pulling; 52. Latch. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] See also Figure 1-5 As shown, the utility model is a quick exhaust mold for die-casting of thin-walled structural parts, including a rear mold frame bottom plate 1, a support block 11 is fixedly connected to the top of the rear mold frame bottom plate 1, a rear mold frame 12 is fixedly connected to the top of the support block 11, a core pulling and resetting mechanism 121 is arranged on the right side of the rear mold frame 12, the top of the rear mold frame 12 contacts the front mold frame 13, a plurality of ejector pins 14 are arranged below the rear mold frame 12, the number of the support blocks 11 is two, the two support blocks 11 are symmetrically arranged, a rear mold core 3 is arranged inside the front mold frame 13, and a slag bag 31 is opened on the top of the rear mold core 3 A venting groove 32 is provided at the top of the rear mold core 3 near the slag bag 31, and an air outlet groove 42 is provided on the back of the rear mold core 3. The utility model provides the venting groove 32, specifically, by providing a plurality of slag bags 31 in combination with the venting groove 32, so that the gas can enter the air outlet groove 42 through the venting groove 32 and then be discharged. By increasing the total cross-sectional area of the venting groove 32 (20%-30% of the gate area), the problem of rapid exhaust of the mold is solved, and the defects of the casting appearance caused by the die-casting cold shut and the problem of poor filling at the ribs are reduced.
[0026] The bottom of the front mold frame 13 contacts the front mold core 2, and a threaded hole is opened at the top of the front mold core 2. The inner wall of the threaded hole is threadedly connected with a locking screw 21. A hole groove is opened at the top of the front mold frame 13, and the inner wall of the hole groove contacts a gate sleeve 22. Guide column holes are opened at the four corners of the top of the rear mold frame 12, and the inner walls of the four guide column holes contact guide columns 23. An exhaust plate 24 is fixedly connected to the back of the front mold core 2. The number of the exhaust plates 24 is two, and the two exhaust plates 24 are symmetrically arranged with the front mold core 2 as the center. The utility model arranges a gate sleeve 22, specifically, the required casting aluminum liquid flows into the L-shaped flow channel 221 through the gate sleeve 22. The L-shaped flow channel 221 can play a buffering role when the aluminum liquid is filled, which is not only conducive to exhaust and reducing casting defects, but also can reduce the erosion force on the mold gate, and can effectively improve the service life of the mold without turning on the boost pressure, improve the die-casting yield rate of communication equipment housing castings, reduce scrapping, and thus reduce the cost of die-casting production.
[0027] An L-shaped flow channel 221 is opened on the top of the rear mold core 3, and an ejector hole 33 is opened on the inner wall of the L-shaped flow channel 221. There are several exhaust grooves 32, and there are several slag bags 31, which are arranged in a vertical array.
[0028] An exhaust plate 2 4 is fixedly connected to the back of the rear mold core 3 , and an exhaust groove 2 41 is provided on the top of the exhaust plate 2 4 . There are a plurality of exhaust grooves 41 , and the plurality of exhaust grooves 41 are arranged in a horizontal array.
[0029] The exhaust plate 2 4 is matched with the exhaust plate 1 24 . There are two exhaust plates 2 4 . The two exhaust plates 2 4 are symmetrically arranged with the rear mold core 3 as the center. The top of the exhaust plate 2 4 contacts the bottom of the exhaust plate 1 24 .
[0030] A core pulling mechanism 5 is fixedly connected to the top of the rear mold frame 12 , and the right side of the core pulling mechanism 5 contacts a latch 52 . A core pulling mechanism 51 is fixedly connected to the left side of the core pulling mechanism 5 , and the left side of the core pulling mechanism 5 contacts the right side of the rear mold core 3 .
[0031] A specific application of this embodiment is: by pouring molten aluminum from the gate sleeve 22 into the L-shaped flow channel 221, since the L-shaped flow channel 221 is set in an L shape, it can play a buffering role when the molten aluminum is filled, which is not only conducive to exhaust and reduces casting defects, but also can reduce the erosion force on the mold gate, and there is no need to turn on the booster, which can effectively increase the service life of the mold, increase the die-casting yield rate of the communication equipment housing casting, reduce scrap and thus reduce the cost of die-casting production. Subsequently, the molten aluminum will fill the mold cavity through the inner gate. Since it is difficult and costly to remove the demoulding slope of the assembly surface through subsequent processing, a core pulling 51 is used for core pulling direct molding. In order to avoid excessive temperature loss of the molten aluminum in the rear mold core 3, which is not conducive to the mold core 3 Filling, the core pulling 51 is set on the opposite side of the gate sleeve 22, and the slag bag 31 and the exhaust groove 32 are used together to allow the gas to enter the exhaust plate 24 and the exhaust plate 24 through the exhaust groove 32, and then be discharged from the inside of the equipment through the exhaust groove 42. The problem of rapid exhaust of the mold is solved by increasing the total cross-sectional area of the exhaust groove 1 (20%-30% of the gate area), reducing the defects of the casting appearance caused by the die-casting cold shut and the problem of poor filling at the ribs. The setting of the locking screw 21 can fix the front mold core 2 inside the front mold frame 13, and the setting of the pin 52 can fix the entire device. The multiple ejector pins 14 arranged at the slag bag 31 can prevent the casting from being ejected and deformed.
[0032] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0033] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A quick exhaust mold for die-casting of thin-walled structural parts, comprising a rear mold frame bottom plate (1), the top of the rear mold frame bottom plate (1) is fixedly connected to a support block (11), the top of the support block (11) is fixedly connected to a rear mold frame (12), a core pulling and resetting mechanism (121) is arranged on the right side of the rear mold frame (12), and the top of the rear mold frame (12) contacts a front mold frame (13), characterized in that: A plurality of ejector pins (14) are arranged below the rear mold frame (12); the number of the support blocks (11) is two, and the two support blocks (11) are symmetrically arranged; a rear mold core (3) is arranged inside the rear mold frame (12); a slag bag (31) is provided on the top of the rear mold core (3); an exhaust groove (32) is provided on the top of the rear mold core (3) near the slag bag (31); and an exhaust groove (42) is provided on the back of the rear mold core (3).
2. A quick exhaust mold for die-casting of thin-walled structural parts according to claim 1, characterized in that: The bottom of the front mold frame (13) contacts the front mold core (2), the top of the front mold core (2) is provided with a threaded hole, the inner wall of the threaded hole is threadedly connected with a locking screw (21), the top of the front mold frame (13) is provided with a hole groove, the inner wall of the hole groove contacts the gate sleeve (22).
3. A quick exhaust mold for die casting of thin-walled structural parts according to claim 2, characterized in that: The top four corners of the rear mold frame (12) are provided with guide post holes, the inner walls of the four guide post holes are in contact with guide posts (23), the back of the front mold core (2) is fixedly connected with an exhaust plate (24), the number of the exhaust plates (24) is two, and the two exhaust plates (24) are symmetrically arranged with the front mold core (2) as the center.
4. A quick exhaust mold for die casting of thin-walled structural parts according to claim 3, characterized in that: An L-shaped flow channel (221) is provided on the top of the rear mold core (3), an ejector pin hole (33) is provided on the inner wall of the L-shaped flow channel (221), the number of the exhaust grooves (32) is a plurality, the number of the slag bags (31) is a plurality, and the plurality of the slag bags (31) are arranged in a vertical array.
5. A quick exhaust mold for die-casting of thin-walled structural parts according to claim 4, characterized in that: The back side of the rear mold core (3) is fixedly connected with an exhaust plate 2 (4), and the top of the exhaust plate 2 (4) is provided with an exhaust groove 2 (41). The number of the exhaust grooves 2 (41) is several, and the several exhaust grooves 2 (41) are arranged in a horizontal array.
6. A quick exhaust mold for die-casting of thin-walled structural parts according to claim 5, characterized in that: The exhaust plate 2 (4) is adapted to the exhaust plate 1 (24), and there are two exhaust plates 2 (4). The two exhaust plates 2 (4) are symmetrically arranged with the rear mold core (3) as the center, and the top of the exhaust plate 2 (4) is in contact with the bottom of the exhaust plate 1 (24).
7. A quick exhaust mold for die-casting of thin-walled structural parts according to claim 1, characterized in that: A core pulling mechanism (5) is fixedly connected to the top of the rear mold frame (12), the right side of the core pulling mechanism (5) contacts a latch (52), and the left side of the core pulling mechanism (5) is fixedly connected to a core pulling mechanism (51), and the left side of the core pulling mechanism (51) contacts the right side of the rear mold core (3).