A secondary ejection die-casting mould

Abstract

The utility model discloses a secondary ejection die -casting die, including base, the top of base is fixedly installed with the top plate through four stand columns, the top plate's top middle position department is fixed with hydraulic cylinder, the end of hydraulic cylinder is fixed with pressure casting upper die in the lower surface of top plate, the upper surface fixed mounting of base has pressure casting lower die, through the design secondary ejection demoulding mechanism, can be demoulded after forming, by reset spring deformation drive the ejection rod elastic reset and carry out the first demoulding treatment to the workpiece after pressure casting forming, when the first demoulding treatment is not in place, two main mobile seat movement drive mobile supporting plate and riser go up, when riser go up, be in the inside sliding control of control slide, until the demoulding ejection plate go up and take out secondary demoulding to it, thereby convenient secondary demoulding to the place, and the buffer goes up when demoulding is not easy to cause damage, improve the convenience of secondary demoulding treatment of die -casting die after pressure casting forming.

Description

Technical Field

[0001] This utility model belongs to the field of die casting mold technology, specifically relating to a secondary ejection die casting mold. Background Technology

[0002] Existing die casting molds are a method of casting liquid forging, a process completed on a dedicated die casting and forging machine. The molten metal is first cast and filled into the mold cavity at low or high speed. The mold has movable cavity surfaces. As the molten metal cools, it is pressurized and forged, which not only eliminates shrinkage cavities and porosity defects in the blank, but also makes the internal structure of the blank reach the forged state of broken grains. After cooling and pressurization, it facilitates the die casting and forming operation.

[0003] Existing die-casting molds typically demold the workpiece after die-casting by using a spring at the bottom to deform and reset an ejector rod, or by using a cylinder to eject a top plate. Therefore, demolding is a single process. For some tightly die-cast workpieces, the spring may not be able to completely eject them, or even at all, making secondary ejection difficult and reducing the demolding effect. This affects the ease of demolding after use. To address this issue, this invention proposes a two-stage ejection die-casting mold. Utility Model Content

[0004] The purpose of this utility model is to provide a secondary ejection die-casting mold to solve the problem mentioned in the background art that after die-casting, the die-casting mold generally demolds the molded workpiece by deforming the spring installed at the bottom of the mold to drive the ejector rod to reset, or by driving the top plate to eject the workpiece through the cylinder. Therefore, the demolding process is only one-time demolding. For some die-cast workpieces that are tightly packed, the spring demolding is not in place or even impossible, which is not convenient for secondary auxiliary demolding and reduces the demolding effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a secondary ejection die-casting mold, comprising a base, a top plate fixedly mounted on the top of the base via four columns, a hydraulic cylinder fixed at the middle position of the top of the top plate, an upper die-casting mold fixed at the end of the hydraulic cylinder on the lower surface of the top plate, an inlet provided on the upper surface of the upper die-casting mold, a lower die-casting mold fixedly mounted on the upper surface of the base, and the lower die-casting mold further comprising:

[0006] A secondary ejection and demolding mechanism is provided, including a drive assembly located at the middle position of the bottom end inside the die-casting lower mold, a moving assembly located at the middle position inside the die-casting lower mold, lifting assemblies located at both ends of the moving assembly, a primary demolding assembly located at the top end of the moving assembly inside the die-casting lower mold, and a secondary demolding assembly located inside the primary demolding assembly.

[0007] An auxiliary support mechanism, comprising an auxiliary support component disposed on the lower surface of the upgrade component and the moving component.

[0008] Preferably, the drive assembly includes a rotating shaft rotatably connected to the middle position of the bottom end inside the die-casting lower mold, and a forward and reverse reversing gear motor is provided at the end of the rotating shaft located on the end surface of the die-casting lower mold. Both ends of the rotating shaft are welded and fixed with active bevel gears.

[0009] Preferably, the movable component includes an adjustment groove located in the middle of the die-casting lower mold, a movable support plate is provided inside the adjustment groove, three vertical plates are integrally provided on the upper surface of the movable support plate, and a control slide groove matching the vertical plates is provided at the bottom of the die-casting lower mold.

[0010] Preferably, the lifting assembly includes a movement control slot formed at both ends inside the adjustment slot. A lifting screw is rotatably mounted inside the movement control slot. A driven bevel gear is fixed at the bottom end of the lifting screw, and the driven bevel gear meshes with the driving bevel gear. A main moving seat is provided on the outer surface of the lifting screw, and the end of the main moving seat is fixed to the end of the moving support plate by welding.

[0011] Preferably, the two lifting screws are symmetrically arranged, and the rotating shaft and the lifting screws are rotatably connected through the driving bevel gear and the driven bevel gear.

[0012] Preferably, the primary demolding assembly includes a demolding ejector plate disposed at the bottom of the die-casting lower mold, and the top of the vertical plate is fixed to the lower surface of the demolding ejector plate by welding.

[0013] Preferably, the secondary demolding assembly includes equidistant limiting grooves inside the demolding ejector plate, a limiting disc is limited inside the limiting groove, a push rod extends from the upper surface of the limiting disc to the upper surface of the demolding ejector plate, and a return spring is fitted inside the limiting groove on the outer surface of the bottom end of the push rod.

[0014] Preferably, the auxiliary support assembly includes an auxiliary movable seat disposed at the bottom end of the outer surface of the lifting screw, a fixing plate is fixedly installed at the middle position of the lower surface of the movable support plate by bolts, and a support plate is welded to the side of the fixing plate at the connection between the side of the auxiliary movable seat and the side of the auxiliary movable seat.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] By designing a secondary ejection and demolding mechanism, the workpiece can be demolded once after die casting by the deformation of the return spring driving the ejector rod to elastically return. If the primary demolding is incomplete, the two main moving seats are moved to move the moving support plate and the upright plate upward. When the upright plate is moved upward, it is controlled to slide inside the control groove until the demolding ejector plate is moved upward and ejected for secondary demolding. This facilitates the secondary demolding and prevents damage during the upward movement of the demolding, thus improving the convenience of secondary demolding after die casting. 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 view of the die-casting lower mold, demolding ejector plate and ejector rod of this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged structural diagram of section B;

[0020] Figure 4 This utility model Figure 2 Enlarged structural diagram of section A;

[0021] Figure 5 This is a schematic diagram of the auxiliary moving seat, support plate and fixing plate of this utility model;

[0022] In the diagram: 101, top plate; 102, hydraulic cylinder; 103, die-casting upper mold; 104, die-casting lower mold; 1041, demolding ejector plate; 1042, adjusting groove; 1043, moving support plate; 1044, upright plate; 1045, ejector rod; 1046, return spring; 1047, limit plate; 1048, limit groove; 1049, control slide; 105, forward and reverse geared motor; 1051, rotating shaft; 1052, driving bevel gear; 1053, moving control groove; 1054, lifting screw; 1055, main moving seat; 1056, driven bevel gear; 1057, auxiliary moving seat; 1058, support plate; 1059, fixing plate; 106, base. Detailed Implementation

[0023] 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.

[0024] Please seeFigures 1 to 5 This utility model provides a technical solution: a secondary ejection die-casting mold, including a base 106, a top plate 101 fixedly installed on the top of the base 106 by four columns, a hydraulic cylinder 102 fixed at the middle position of the top of the top of the top plate 101, a die-casting upper mold 103 fixed at the end of the hydraulic cylinder 102 on the lower surface of the top plate 101, an inlet provided on the upper surface of the die-casting upper mold 103, and a die-casting lower mold 104 fixedly installed on the upper surface of the base 106, the die-casting lower mold 104 also being provided with:

[0025] The secondary ejection and demolding mechanism includes a drive assembly located at the middle of the bottom of the die-casting lower mold 104, a moving assembly located at the middle of the die-casting lower mold 104, lifting assemblies located at both ends of the moving assembly, a primary demolding assembly located at the top of the moving assembly located inside the die-casting lower mold 104, and a secondary demolding assembly located inside the primary demolding assembly. When the die-casting mold is formed and demolded, the secondary ejection and demolding mechanism can slowly eject the formed workpiece inside, facilitating demolding.

[0026] To facilitate the simultaneous rotation of the two lifting screws 1054 via the drive assembly, in this embodiment, preferably, the drive assembly includes a rotating shaft 1051 rotatably connected to the middle position of the bottom end inside the die-casting lower mold 104. A forward and reverse geared motor 105 is provided at the end of the rotating shaft 1051 on the end surface of the die-casting lower mold 104. Both ends of the rotating shaft 1051 are welded and fixed with active bevel gears 1052. The forward and reverse geared motor 105 drives the rotating shaft 1051 and the two active bevel gears 1052 to rotate, facilitating rotation adjustment.

[0027] In order to facilitate the stable movement and ejection of the demolding ejector plate 1041 through the moving component, in this embodiment, preferably, the moving component includes an adjustment groove 1042 opened in the middle position inside the die-casting lower mold 104. The adjustment groove 1042 is provided with a moving support plate 1043. Three upright plates 1044 are integrally provided on the upper surface of the moving support plate 1043. The bottom of the die-casting lower mold 104 is provided with a control slide groove 1049 that matches the upright plates 1044. When the moving support plate 1043 is on the upper surface inside the adjustment groove 1042, it can drive the upright plates 1044 to move stably inside the control slide groove 1049, thereby moving the demolding ejector plate 1041 upward and ejecting it again for demolding.

[0028] To facilitate stable movement and adjustment of the movable pallet 1043 via the lifting assembly, in this embodiment, preferably, the lifting assembly includes a movement control groove 1053 formed at both ends inside the adjustment groove 1042. A lifting screw 1054 rotates inside the movement control groove 1053. A driven bevel gear 1056 is fixed to the bottom end of the lifting screw 1054, and the driven bevel gear 1056 meshes with the driving bevel gear 1052. A main moving seat 1055 is provided on the outer surface of the lifting screw 1054. The end of the main moving seat 1055 is welded to the end of the movable pallet 1043. Both lifting screws 1054 can rotate simultaneously, driving both main moving seats 1055 to move simultaneously. The two main moving seats 1055 then drive the movable pallet 1043 to the upper surface of the adjustment groove 1042. Therefore, the movable pallet 1043 and the upright plate 1044 eject the demolding ejector plate 1041.

[0029] In order to facilitate secondary demolding when elastic demolding is incomplete, the primary demolding assembly is preferably provided in this embodiment as follows: the primary demolding assembly includes a demolding ejector plate 1041 disposed at the bottom of the die-casting lower mold 104, and the top of the upright plate 1044 is fixed to the lower surface of the demolding ejector plate 1041 by welding. After the demolding is incomplete inside the die-casting lower mold 104 by the ejector rod 1045, the demolding ejector plate 1041 can be moved upward to perform demolding again, which facilitates secondary demolding.

[0030] To facilitate elastic demolding after molding using a secondary demolding assembly, in this embodiment, preferably, the secondary demolding assembly includes equidistant grooves 1048 inside the demolding ejector plate 1041. A limiting plate 1047 is positioned inside the limiting grooves 1048. A push rod 1045 extends from the upper surface of the limiting plate 1047 to the upper surface of the demolding ejector plate 1041. A return spring 1046 is fitted inside the limiting grooves 1048 on the outer surface of the bottom end of the push rod 1045. After molding inside the die-casting lower mold 104, the return spring 1046 deforms and drives the push rod 1045 to elastically eject and reset, thereby demolding the molded workpiece.

[0031] An auxiliary support mechanism is provided, which includes an auxiliary support component connected to the lower surface of the upgrade component and the moving component. During the demolding process, the moving pallet 1043 is moved by the auxiliary support mechanism, which drives the moving pallet 1043 to move upward and be ejected evenly under force.

[0032] To facilitate uniform upward movement of the movable pallet 1043 under pressure via the auxiliary support assembly, in this embodiment, preferably, the auxiliary support assembly includes an auxiliary moving seat 1057 disposed at the bottom end of the outer surface of the lifting screw 1054. A fixing plate 1059 is bolted to the middle position of the lower surface of the movable pallet 1043. A support plate 1058 is welded to the side of the fixing plate 1059 at the connection point with the side of the auxiliary moving seat 1057. When the main moving seat 1055 moves stably, the auxiliary moving seat 1057 moves at the same speed, and the movement of the auxiliary moving seat 1057, through the support plate 1058 and the fixing plate 1059, uniformly lifts and demolds the movable pallet 1043 under pressure.

[0033] In this utility model, the forward and reverse geared motor 105 is model WS-60GA775F, and the wires connected to the forward and reverse geared motor 105 are connected to an external power supply and an external start / stop switch for control. As this is prior art, it will not be described in detail.

[0034] The working principle and usage process of this utility model: When using this type of secondary ejection die-casting mold, the bottom end of the base 106 is first fixed to the position of use by contacting the mounting surface. After the fixed installation, the hydraulic cylinder 102 drives the upper die-casting mold 103 to move down to the surface of the lower die-casting mold 104. When the upper die-casting mold 103 is embedded into the interior of the lower die-casting mold 104, the part of the upper die-casting mold 103 in contact with the part of the ejector rod 1045 is squeezed and embedded into the interior. At this time, a certain space is formed between the lower die-casting mold 104 and the upper die-casting mold 103, and the molten material enters through the inlet at the top.

[0035] Then, when the die-casting mold is demolded after die-casting, the top edge of the ejector rod 1045 contacts the workpiece surface, resetting the upper die-casting mold 103. At this time, the return spring 1046 deforms, causing the ejector rod 1045 to elastically reset, performing a first demolding process on the die-cast workpiece. If the first demolding process is insufficient, an external switch can be activated to power the forward and reverse geared motor 105. Powering the forward and reverse geared motor 105 drives the rotating shaft 1051 to rotate with the two active bevel gears 1052, engaging the active bevel gears 1052 with the driven bevel gears. The outer surface of the gear 1056 drives the lifting screw 1054 to rotate. When the two lifting screws 1054 rotate, they drive the two main moving seats 1055 to move respectively. The movement of the two main moving seats 1055 drives the moving support plate 1043 and the upright plate 1044 to move upward. When the upright plate 1044 moves upward, it is in the sliding control inside the control groove 1049 until the demolding ejector plate 1041 is moved upward and ejected for secondary demolding. This facilitates the secondary demolding and the upward movement during demolding is buffered to prevent damage. This improves the convenience of secondary demolding after die casting.

[0036] Finally, during the secondary demolding process, when the main moving seat 1055 moves on the outer surface of the lifting screw 1054, the auxiliary moving seat 1057 moves upward at the same speed as the main moving seat 1055. The upward movement of the auxiliary moving seat 1057 provides even force support to the two ends and the middle position of the moving support plate 1043 through the support plate 1058 and the fixed plate 1059, thus effectively performing secondary ejection and demolding.

[0037] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A secondary ejection die-casting mold, comprising a base (106), wherein a top plate (101) is fixedly mounted on the top of the base (106) by four columns, a hydraulic cylinder (102) is fixed at the middle position of the top of the top of the top plate (101), and a die-casting upper mold (103) is fixedly mounted on the lower surface of the top plate (101) at the end of the hydraulic cylinder (102), wherein an inlet is provided on the upper surface of the die-casting upper mold (103), and a die-casting lower mold (104) is fixedly mounted on the upper surface of the base (106), characterized in that: The die-casting lower mold (104) is also provided with: A secondary ejection and demolding mechanism is provided, and the secondary ejection and demolding mechanism includes a drive component located at the middle position of the bottom end inside the die-casting lower mold (104), a moving component located at the middle position inside the die-casting lower mold (104), lifting components located at both ends of the moving component, a primary demolding component located inside the die-casting lower mold (104) at the top end of the moving component, and a secondary demolding component located inside the primary demolding component; An auxiliary support mechanism, comprising an auxiliary support component disposed on the lower surface of the upgrade component and the moving component.

2. The secondary ejection die-casting mold according to claim 1, characterized in that: The drive assembly includes a rotating shaft (1051) rotatably connected to the middle position of the bottom end inside the die-casting lower mold (104). The end of the rotating shaft (1051) is provided with a forward and reverse reversing gear motor (105) on the end surface of the die-casting lower mold (104). Both ends of the rotating shaft (1051) are welded and fixed with active bevel gears (1052).

3. The secondary ejection die-casting mold according to claim 2, characterized in that: The movable component includes an adjustment groove (1042) located in the middle of the die-casting lower mold (104). A movable support plate (1043) is provided inside the adjustment groove (1042). Three upright plates (1044) are integrally provided on the upper surface of the movable support plate (1043). A control slide groove (1049) matching the upright plates (1044) is provided at the bottom of the die-casting lower mold (104).

4. The secondary ejection die-casting mold according to claim 3, characterized in that: The lifting assembly includes a movement control slot (1053) formed at both ends inside the adjustment slot (1042). A lifting screw (1054) rotates inside the movement control slot (1053). A driven bevel gear (1056) is fixed at the bottom end of the lifting screw (1054), and the driven bevel gear (1056) meshes with the driving bevel gear (1052). A main moving seat (1055) is provided on the outer surface of the lifting screw (1054). The end of the main moving seat (1055) is fixed to the end of the moving support plate (1043) by welding.

5. A secondary ejection die-casting mold according to claim 4, characterized in that: The two lifting screws (1054) are symmetrically arranged, and the rotating shaft (1051) and the lifting screws (1054) are rotatably connected through the driving bevel gear (1052) and the driven bevel gear (1056).

6. A secondary ejection die-casting mold according to claim 3, characterized in that: The primary demolding assembly includes a demolding ejector plate (1041) disposed at the bottom of the die-casting lower mold (104), and the top of the vertical plate (1044) is fixed to the lower surface of the demolding ejector plate (1041) by welding.

7. A secondary ejection die-casting mold according to claim 6, characterized in that: The secondary demolding assembly includes equidistant limiting grooves (1048) inside the demolding ejector plate (1041). A limiting plate (1047) is limited inside the limiting groove (1048). A push rod (1045) extends from the upper surface of the limiting plate (1047) to the upper surface of the demolding ejector plate (1041). A return spring (1046) is fitted inside the limiting groove (1048) on the outer surface of the bottom end of the push rod (1045).

8. A secondary ejection die-casting mold according to claim 4, characterized in that: The auxiliary support assembly includes an auxiliary movable seat (1057) disposed at the bottom of the outer surface of the lifting screw (1054), a fixed plate (1059) is fixedly installed at the middle position of the lower surface of the movable support plate (1043) by bolts, and a support plate (1058) is welded to the side of the fixed plate (1059) at the connection between the side of the fixed plate (1059) and the side of the auxiliary movable seat (1057).

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