A demolding device for housing die casting

Abstract

The utility model discloses a shell die casting is with drawing device, including support and drawing mechanism, support: the upper surface of support is installed with the lower mould through bolt, and the upside of support is equipped with adjustable upper mould, drawing mechanism: it includes slide hole, push rod, movable plate, ejector rod, avoidance hole and drive assembly, the upper surface both sides of support all are equipped with slide hole, and the inside of slide hole all slide connections have push rod, and the lower extreme of two push rods all are fixedly connected with the upper surface of a movable plate, and the upper surface middle part of movable plate is equipped with ejector rod, and the lower surface of lower mould is equipped with avoidance hole, and the outer surface of ejector rod is connected with the hole wall of avoidance hole between sliding, this shell die casting is with drawing device, through the setting of drawing mechanism, metal shell is after pressure casting molding, and upper mould is separated from lower mould at the same time, and drawing mechanism directly ejects metal shell lower mould and completes drawing, need not to help tool and external driving device, and drawing is convenient and reduced energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of shell die casting technology, specifically a demolding device for shell die casting. Background Technology

[0002] Die casting is a very common process choice for the metal casing of electromechanical equipment, especially suitable for the manufacture of casings made of lightweight non-ferrous metals such as aluminum alloy and zinc alloy. Die casting has high forming efficiency and is suitable for mass production. Die casting molds are used in the die casting process.

[0003] In the existing die-casting process, molten metal is usually added into the lower mold, and the upper mold is driven to move down by a press. The upper mold moves down and cooperates with the lower mold to die-cast the molten metal into a suitable shape. After a period of forming and cooling, the upper mold and the lower mold are separated, and the metal shell can be taken out.

[0004] The following problems exist: After the metal shell is die-cast, part of it is removed from the lower mold by workers using a part-removing tool, and the other part is pushed out of the lower mold by an external drive device to move the ejector rod. The former is troublesome to demold with tools and is easy to cause scratches, while the latter requires an external drive device, which increases energy consumption. To address this, we propose a demolding device for die-casting shells. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a demolding device for die casting of outer shell. With the setting of the demolding mechanism, after the metal outer shell is die-cast, the upper mold separates from the lower mold, and the demolding mechanism directly pushes the metal outer shell out of the lower mold to complete the demolding. There is no need to rely on tools and external driving devices. Demolding is convenient and energy consumption is reduced, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a demolding device for die casting of outer shell, comprising a support and a demolding mechanism;

[0007] Support: The lower mold is bolted to the upper surface of the support, and an adjustable upper mold is provided on the upper side of the support;

[0008] Demolding mechanism: It includes sliding holes, push rods, movable plates, ejector rods, clearance holes, and drive components. Sliding holes are provided on both the left and right sides of the upper surface of the support. Push rods are slidably connected inside the sliding holes. The lower ends of the two push rods are fixedly connected to the upper surface of a movable plate. An ejector rod is provided in the middle of the upper surface of the movable plate. A clearance hole is provided on the lower surface of the lower mold. The outer surface of the ejector rod is slidably connected to the wall of the clearance hole. A drive component is provided inside the support. With the setting of the demolding mechanism, after the metal shell is die-cast, the upper mold separates from the lower mold, and the demolding mechanism directly ejects the metal shell from the lower mold to complete the demolding. No tools or external drive devices are needed, making demolding convenient and reducing energy consumption.

[0009] Furthermore, guide rods are provided at the four corners of the upper surface of the support, and a movable plate is slidably connected between the four guide rods. A mold handle is provided on the upper surface of the movable plate, and an upper mold is installed on the lower surface of the movable plate by bolts, which facilitates the sliding and limiting of the upper mold.

[0010] Furthermore, the driving assembly includes connecting rods, pressure plates, and limiting plates. Connecting rods are provided on both the left and right sides of the lower surface of the moving plate, pressure plates are provided at the lower ends of the connecting rods, and limiting plates are provided at the upper ends of the push rods to facilitate the downward movement of the push rod.

[0011] Furthermore, the support has mounting openings on both the left and right sides of its lower surface, and a fixing plate is provided inside each mounting opening. Threaded holes are provided on both the left and right sides of the lower surface of the mounting opening, and fixing bolts are rotatably connected to the rotating holes on both the left and right sides of the lower surface of the fixing plate. The upper stud of the fixing bolt is threadedly connected to the threaded hole on the same side, which facilitates the replacement of the spring.

[0012] Furthermore, the drive assembly also includes a fixed rod and a guide sleeve. Fixed rods are provided on both the left and right sides of the lower surface of the movable plate, and guide sleeves are provided on the upper surface of the fixed plate. The fixed rods are slidably connected to the inside of the guide sleeve on the same side, which facilitates the guiding and limiting of the spring.

[0013] Furthermore, the drive assembly also includes springs, and springs are movably fitted on the outer surface of the guide sleeve. The springs are located between the upper surface of the fixed plate and the lower surface of the movable plate on the same side, which facilitates driving the ejector rod to move upward.

[0014] Furthermore, each of the four corners of the upper surface of the support is provided with a lower limit sleeve, which is fixedly sleeved on the lower side of the outer surface of the guide rod on the same side. Each of the through holes opened on the lower surface of the moving plate is provided with an upper limit sleeve, which is movably sleeved on the upper side of the outer surface of the corresponding guide rod, so as to limit the maximum downward movement height of the upper mold.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This demolding device for die casting of outer shell has the following advantages:

[0016] During the die-casting process, the ejector rod retracts into the clearance hole without affecting the die-casting operation. After the metal shell is formed by die casting, when the upper mold moves up and resets to separate from the lower mold, the downward pressure of the connecting rod and the pressure plate on the push rod is released. Under the action of the spring's rebound force, the movable plate drives the ejector rod to move upward and push the metal shell out of the lower mold, completing the demolding work. No tools or external driving devices are needed, making demolding convenient and reducing energy consumption. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is an enlarged structural diagram of point A of this utility model.

[0020] In the diagram: 1. Support, 2. Lower mold, 3. Upper mold, 4. Demolding mechanism, 41. Sliding hole, 42. Push rod, 43. Movable plate, 44. Ejector rod, 45. Clearance hole, 46. Drive assembly, 461. Connecting rod, 462. Pressure plate, 463. Limiting plate, 464. Fixing rod, 465. Guide sleeve, 466. Spring, 5. Guide rod, 6. Movable plate, 7. Lower limit sleeve, 8. Upper limit sleeve, 9. Mold handle, 10. Mounting port, 11. Fixing plate, 12. Fixing bolt. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-3 This embodiment provides a technical solution: a demolding device for die casting of outer shell, including a support 1 and a demolding mechanism 4;

[0023] Support 1: The upper surface of support 1 is bolted with a lower mold 2. The upper side of support 1 is provided with an adjustable upper mold 3. The four corners of the upper surface of support 1 are provided with guide rods 5. A movable plate 6 is slidably connected between the four guide rods 5. The upper surface of the movable plate 6 is provided with a mold handle 9. The lower surface of the movable plate 6 is bolted with an upper mold 3.

[0024] Both lower molds 2 and 3 can have cooling channels inside. These cooling channels are commonly used in existing die-casting molds. During the die-casting process, coolant is introduced into the cooling channels to cool the formed metal shell. The moving plate 6 is fixedly connected to the slider of the external press via the mold handle 9. When die-casting of the metal shell is required, molten metal is added to lower mold 2. Under the constraint of guide rod 5, the slider of the external press drives upper mold 3 to move downward via upper moving plate 6 until upper mold 3 and lower mold 2 mate to form a special moving shape. After a period of pressure holding in the cavity (the holding time depends on the material and wall thickness of the die casting; for aluminum alloy shells, the holding time increases by about 0.5 to 1 second for every 1mm increase in wall thickness; generally, the holding time for small thin-walled parts is 2 to 5 seconds, while for large thick-walled parts it can reach 10 to 20 seconds; zinc alloy shells have a faster solidification speed and a relatively shorter holding time, usually 1 to 3 seconds), the molten metal in the cavity is formed into a metal shell. After the metal shell cools down for a period of time (the cooling time is also related to the casting parameters; for example, for aluminum alloy shells, when the wall thickness is ≤3mm, the cooling time is about 5 to 10 seconds, and when the wall thickness is 3 to 10mm, the cooling time is 10 to 25 seconds), the upper mold 3 moves up and resets.

[0025] Demolding mechanism 4: It includes sliding holes 41, push rods 42, movable plates 43, ejector rods 44, clearance holes 45 and drive components 46. Sliding holes 41 are provided on both the left and right sides of the upper surface of the support 1. Push rods 42 are slidably connected inside the sliding holes 41. The lower ends of the two push rods 42 are fixedly connected to the upper surface of a movable plate 43. An ejector rod 44 is provided in the middle of the upper surface of the movable plate 43. A clearance hole 45 is provided on the lower surface of the lower mold 2. The outer surface of the ejector rod 44 is slidably connected to the hole wall of the clearance hole 45.

[0026] The wall of the clearance hole 45 can be provided with a graphite sealing ring. The graphite sealing ring can withstand high temperature and is used to seal the sliding gap between the ejector rod 44 and the clearance hole 45 to prevent molten metal leakage. The support 1 is provided with a drive assembly 46. The movement of the push rod 42 drives the ejector rod 44 to move downward through the movable plate 43. When the upper mold 3 and the lower mold 2 are closed, the ejector rod 44 is completely retracted into the clearance hole 45. The upper surface of the ejector rod 44 is in the same horizontal plane as the upper side of the clearance hole 45. The movable plate 43 moves down and drives the fixed rod 464 to slide in the guide sleeve 465. At the same time, the movable plate 43 compresses the spring 466 downward. When the upper mold 3 moves up and resets, the downward pressure on the push rod 42 is released. Under the action of the spring 466, the movable plate 43 drives the ejector rod 44 to move upward and push out the metal shell in the lower mold 2 to complete the demolding.

[0027] The drive assembly 46 includes a connecting rod 461, a pressure plate 462, and a limiting piece 463. The lower surface of the moving plate 6 is provided with connecting rods 461 on both the left and right sides. The lower end of the connecting rods 461 is provided with a pressure plate 462, and the upper end of the push rod 42 is provided with a limiting piece 463. During the downward movement of the upper mold 3, the connecting rods 461 drive the pressure plate 462 to move downward until the lower surface of the pressure plate 462 contacts the upper surface of the limiting piece 463. The upper mold 3 continues to move downward, and the pressure plate 462 drives the push rod 42 to move downward along the sliding hole 41 through the limiting piece 463. Due to the presence of the limiting piece 463, the push rod 42 is prevented from coming out of the sliding hole 41.

[0028] Mounting ports 10 are provided on both the left and right sides of the lower surface of the support 1. Fixing plates 11 are provided inside the mounting ports 10. Threaded holes are provided on both the left and right sides of the lower surface of the mounting ports 10. Fixing bolts 12 are rotatably connected in the rotating holes on both the left and right sides of the lower surface of the fixing plates 11. The upper stud of the fixing bolts 12 is threadedly connected to the threaded hole on the same side. If the spring 466 is worn out, the fixing bolts 12 can be unscrewed, and the fixing plate 11 can be removed from the mounting port 10 together with the guide sleeve 465. The spring 466 can then be removed. After that, the new spring 466 is put on the guide sleeve 465. The spring 466 and the guide sleeve 465 are installed together on the support 1 through the fixing plate 11 and the fixing bolts 12 to complete the replacement of the spring 466.

[0029] The drive assembly 46 also includes a fixing rod 464 and a guide sleeve 465. The lower surface of the movable plate 43 is provided with fixing rods 464 on both the left and right sides, and the upper surface of the fixing plate 11 is provided with guide sleeves 465. The fixing rods 464 are slidably connected to the inside of the guide sleeves 465 on the same side. The drive assembly 46 also includes a spring 466. The outer surface of the guide sleeves 465 is movably fitted with springs 466. The springs 466 are located between the upper surface of the fixing plate 11 and the lower surface of the movable plate 43 on the same side. The elasticity of the springs 466 needs to be checked regularly to ensure that the springs 466 have sufficient rebound force to complete the demolding work.

[0030] Lower limit sleeves 7 are provided at the four corners of the upper surface of the support 1. The lower limit sleeves 7 are fixedly sleeved on the lower side of the outer surface of the guide rod 5 on the same side. Upper limit sleeves 8 are provided in the through holes opened on the lower surface of the moving plate 6. The upper limit sleeves 8 are movably sleeved on the upper side of the outer surface of the corresponding guide rod 5. Due to the presence of the upper limit sleeves 8 and the lower limit sleeves 7, the maximum downward movement height of the upper mold 3 is limited. That is, when the upper mold 3 moves downward to the contact between the upper limit sleeve 8 and the lower limit sleeve 7, it cannot continue to move downward. This avoids the situation where the upper mold 3 and the lower mold 2 are severely worn due to excessive downward movement.

[0031] The working principle of the demolding device for die casting of outer shell provided by this utility model is as follows: The moving plate 6 is fixedly connected to the slider of the external press through the mold handle 9. When die casting of metal outer shell is required, molten metal is added into the lower mold 2. Under the restriction of the guide rod 5, the slider of the external press drives the upper mold 3 to move down through the upper moving plate 6 until the upper mold 3 and the lower mold 2 cooperate to form a cavity of a special shape. After a period of pressure holding (the length of pressure holding time is related to the material and wall thickness of the die casting. For aluminum alloy outer shells, the pressure holding time increases by about 0.5~1s for every 1mm increase in wall thickness. Generally, the pressure holding time for small thin-walled parts is 2~5s, and for large thick-walled parts it can reach 10~20s. Zinc alloy outer shells have a fast solidification speed and the pressure holding time is relatively shorter, usually 1~3s), the molten metal in the cavity is formed into a metal outer shell. After the metal outer shell cools for a period of time (the determination of the cooling time is also related to the casting parameters. Taking aluminum alloy outer shells as an example, when the wall thickness is ≤3mm, the cooling time is 1~3s), the molten metal in the cavity is formed into a metal outer shell. When the wall thickness is 3-10mm, the cooling time is about 5-10 seconds; when the wall thickness is 3-10mm, the cooling time is 10-25 seconds. The upper mold 3 moves upward and resets.

[0032] As the upper mold 3 moves downward, the connecting rod 461 drives the pressure plate 462 downward until the lower surface of the pressure plate 462 contacts the upper surface of the limiting piece 463. The upper mold 3 continues to move downward, and the pressure plate 462 drives the push rod 42 to move downward along the sliding hole 41 through the limiting piece 463. Due to the presence of the limiting piece 463, the push rod 42 is prevented from coming out of the sliding hole 41. The movement of the push rod 42 drives the ejector rod 44 downward through the movable plate 43. When the upper mold 3 and the lower mold 2 are joined... During the molding process, the ejector rod 44 is fully retracted into the clearance hole 45, and the upper surface of the ejector rod 44 is in the same horizontal plane as the upper side of the clearance hole 45. The movable plate 43 moves down, causing the fixed rod 464 to slide in the guide sleeve 465. At the same time, the movable plate 43 compresses the spring 466 downward. When the upper mold 3 moves up and resets, the downward pressure on the push rod 42 is released. Under the action of the spring 466's rebound force, the movable plate 43 drives the ejector rod 44 to move upward and push out the metal shell in the lower mold 2, completing the demolding.

[0033] The elasticity of spring 466 needs to be checked regularly to ensure that spring 466 has sufficient rebound force to complete the demolding work. If spring 466 is aged, unscrew the fixing bolt 12, and the fixing plate 11 can be removed from the mounting port 10 together with the guide sleeve 465. Then, the spring 466 can be removed. After that, the new spring 466 is put on the guide sleeve 465. The spring 466 and the guide sleeve 465 are installed together on the support 1 through the fixing plate 11 and the fixing bolt 12 to complete the replacement of spring 466.

[0034] The presence of the upper limit sleeve 8 and the lower limit sleeve 7 limits the maximum downward movement height of the upper mold 3. That is, when the upper mold 3 moves downward and contacts the upper limit sleeve 8 and the lower limit sleeve 7, it cannot continue to move downward, thus avoiding the situation where the upper mold 3 and the lower mold 2 are severely worn due to excessive downward movement.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A demolding device for die casting of outer shell, characterized in that: Includes a support (1) and a demolding mechanism (4); Support (1): The upper surface of the support (1) is fitted with a lower mold (2) by bolts, and the upper side of the support (1) is provided with an adjustable upper mold (3). Demolding mechanism (4): It includes a sliding hole (41), a push rod (42), a movable plate (43), an ejector rod (44), a clearance hole (45), and a drive assembly (46). The upper surface of the support (1) is provided with sliding holes (41) on both the left and right sides. The sliding holes (41) are slidably connected to the inside of the sliding holes (41). The lower ends of the two push rods (42) are fixedly connected to the upper surface of a movable plate (43). The upper surface of the movable plate (43) is provided with an ejector rod (44) in the middle. The lower surface of the lower mold (2) is provided with a clearance hole (45). The outer surface of the ejector rod (44) is slidably connected to the hole wall of the clearance hole (45). The support (1) is provided with a drive assembly (46).

2. The demolding device for die casting of a housing according to claim 1, characterized in that: The support (1) has guide rods (5) at the four corners of its upper surface. A movable plate (6) is slidably connected between the four guide rods (5). A mold handle (9) is provided on the upper surface of the movable plate (6). An upper mold (3) is installed on the lower surface of the movable plate (6) by bolts.

3. The demolding device for die casting of a housing according to claim 2, characterized in that: The drive assembly (46) includes a connecting rod (461), a pressure plate (462), and a limiting piece (463). The lower surface of the moving plate (6) is provided with connecting rods (461) on both the left and right sides. The lower end of the connecting rod (461) is provided with a pressure plate (462), and the upper end of the push rod (42) is provided with a limiting piece (463).

4. The demolding device for die casting of a housing according to claim 1, characterized in that: The support (1) has mounting openings (10) on both the left and right sides of its lower surface. Each mounting opening (10) has a fixing plate (11) inside it. Each mounting opening (10) has a threaded hole on both the left and right sides of its lower surface. Each fixing plate (11) has a fixing bolt (12) rotatably connected in the rotating hole on both the left and right sides of its lower surface. The upper stud of the fixing bolt (12) is threadedly connected to the threaded hole on the same side.

5. A demolding device for die casting of a housing according to claim 4, characterized in that: The drive assembly (46) also includes a fixing rod (464) and a guide sleeve (465). The lower surface of the movable plate (43) is provided with fixing rods (464) on both the left and right sides, and the upper surface of the fixing plate (11) is provided with guide sleeves (465). The fixing rods (464) are slidably connected to the inside of the guide sleeves (465) on the same side.

6. A demolding device for die casting of a housing according to claim 5, characterized in that: The drive assembly (46) also includes a spring (466). The outer surface of the guide sleeve (465) is movably fitted with a spring (466). The springs (466) are located between the upper surface of the fixed plate (11) and the lower surface of the movable plate (43) on the same side.

7. A demolding device for die casting of a housing according to claim 2, characterized in that: The support (1) has a lower limit sleeve (7) at each of the four corners of its upper surface. The lower limit sleeve (7) is fixedly sleeved on the lower side of the outer surface of the guide rod (5) on the same side. The upper limit sleeve (8) is provided in the through hole opened on the lower surface of the moving plate (6). The upper limit sleeve (8) is movably sleeved on the upper side of the outer surface of the corresponding guide rod (5).

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