Automatic ejection type die-casting die

Abstract

The utility model belongs to the field of die-casting dies, and particularly relates to an automatic ejection type die-casting die which comprises a bottom plate, a lower die is fixedly connected to the middle of the upper end of the bottom plate, an ejection mechanism is arranged in the lower die, stand columns are fixedly connected to the four corners of the upper end of the bottom plate, and a top plate is fixedly connected to the tops of the stand columns. A hydraulic cylinder is fixedly mounted in the middle of the upper end of the top plate, and a piston rod of the hydraulic cylinder penetrates through the top plate and is slidably connected with the top plate. According to the die-casting die, the ejection mechanism is arranged in the lower die body of the die-casting die, when the upper die body and the lower die body are closed, the pressing rod on the upper die body is inserted into the lower die body and applies downward pressure to the sliding plate in the lower die body, and therefore the ejection block on the sliding plate is attached to the lower die body; and the sliding plate and the ejection block can be reset under the elastic force action of the spring, and a die casting formed in the die is automatically ejected out, so that blanking is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of die-casting molds, in particular to an automatic ejection type die-casting mold. Background Art

[0002] A die-casting mold is a mold used in the die-casting process, usually consisting of an upper mold and a lower mold. In the die-casting process, liquid metal is injected into the mold, and the metal is pressed into parts of the desired shape by high pressure. For example, the utility model patent with the authorization announcement CN218224595U proposes an aluminum alloy die-casting mold, including a base, a support plate fixedly installed on the top of the base, a top plate fixedly installed on the top of the support plate, a fixed mold fixedly installed on the top of the base, a groove provided on the top of the fixed mold, an ejector pin fixedly installed inside the fixed mold, a fixed seat fixedly installed on the top of the top plate, a cylinder fixedly installed inside the fixed seat, and a movable mold fixedly installed on the movable end of the cylinder.

[0003] However, after the die castings are formed in the existing die casting molds, they will be retained in the molds and are not easy to demold. In addition, the piston rod of the hydraulic cylinder used to open and close the molds will be worn due to repeated extension and retraction, which requires downtime for maintenance and affects production efficiency. Therefore, it is necessary to improve it. Utility Model Content

[0004] The utility model aims to provide an automatic ejection die-casting mold, which solves the problem that the die-casting parts in the existing die-casting mold will be retained in the mold after molding and are difficult to demold, and at the same time solves the problem that the piston rod of the hydraulic cylinder used for opening and closing the mold is repeatedly stretched and retracted, which causes wear and tear, requires shutdown for maintenance, and affects production efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic ejection type die-casting mold, comprising a base plate, a lower mold is fixedly connected to the middle of the upper end of the base plate, an ejection mechanism is arranged inside the lower mold, four corners of the upper end of the base plate are fixedly connected to columns, and the top of the column is fixedly connected to the top plate, a hydraulic cylinder is fixedly installed in the middle of the upper end of the top plate, a piston rod of the hydraulic cylinder passes through the top plate and is slidably connected to the top plate, the end of the piston rod is fixedly connected to a connecting frame, the bottom of the connecting frame is fixedly connected to an upper mold, the upper mold is in contact with the lower mold, a flow channel is fixedly connected to the inside of the upper mold, and a guiding lubrication mechanism is arranged at the bottom of the top plate.

[0006] Preferably, the ejection mechanism comprises a slide plate slidably connected to the inside of the lower die, an ejection block is fixedly connected to the upper end of the slide plate, the ejection block penetrates the lower die and is slidably connected to the lower die, a guide rod is fixedly connected to the inner side of the lower die, the guide rod penetrates the slide plate and is slidably connected to the slide plate, a spring is sleeved on the outer side of the rod body of the guide rod, a pressure rod is fixedly connected to the bottom of the upper die, the pressure rod is slidably connected to the lower die, and the pressure rod abuts against the slide plate. By setting the ejection mechanism, the die-casting formed in the mold can be automatically ejected, which is convenient for material unloading.

[0007] Preferably, the side of the slide plate is provided with a ball bearing, and the ball bearing is slidably connected to the inner surface of the lower die. The relative friction between the slide plate and the lower die can be reduced by providing the ball bearing.

[0008] Preferably, one end of the spring is fixedly connected to the slide plate, and the other end of the spring is fixedly connected to the inner surface of the lower die. Through the arrangement of the spring, the elastic force can be applied to the ejection block through the slide plate.

[0009] Preferably, the guide lubrication mechanism comprises a hollow shell, the hollow shell is fixedly connected to the bottom of the top plate, the hollow shell is slidably connected to the piston rod of the hydraulic cylinder, the inner side of the hollow shell is slidably connected with a top ring and a sponge sleeve, and the top ring and the sponge sleeve are in contact, the inner top of the hollow shell is fixedly connected with a fixed rod, the bottom of the fixed rod is fixedly connected with a pressing plate, the pressing plate is in contact with the sponge sleeve, and the inner ring wall of the hollow shell is provided with an oil leakage hole. By setting the guide lubrication mechanism, the piston rod of the hydraulic cylinder can be guided and lubricated.

[0010] Preferably, the outer ring wall of the hollow shell is slidably connected with a rubber plug, and the outer side of the rubber plug is fixedly connected with a pull ring. After removing the rubber plug, lubricating oil can be added into the hollow shell.

[0011] Preferably, the upper end of the connecting frame is fixedly connected with two ejector pins, and the two ejector pins are symmetrically distributed. Through the arrangement of the ejector pins, the hollow shell can be inserted from the bottom.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. The utility model arranges an ejection mechanism inside the lower die of the die-casting die. When the upper die and the lower die are closed, the pressure rod on the upper die is inserted into the lower die and applies a downward pressure to the slide plate in the lower die, so that the ejection block on the slide plate fits with the lower die. When the lower die and the upper die are separated, the slide plate and the ejection block will be reset under the elastic force of the spring, and the die-casting formed in the die will be automatically ejected, which is convenient for unloading.

[0014] 2. The utility model arranges a guide lubrication mechanism on the outer side of the piston rod of the hydraulic cylinder. When the hydraulic cylinder drives the connecting frame on the upper mold to move up and reset, the ejector pin on the connecting frame can be inserted into the hollow shell from the bottom, and then the sponge sleeve is squeezed to release the lubricating oil, lubricate the piston rod, reduce the wear of the piston rod, and is suitable for continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 For the utility model Figure 1 A front cross-sectional view of

[0017] Figure 3 For the utility model Figure 2 A sectional perspective view of the guide lubrication mechanism;

[0018] Figure 4 For the utility model Figure 2 Top view of the top ring.

[0019] In the figure: 1, bottom plate; 2, lower die; 3, column; 4, top plate; 5, hydraulic cylinder; 6, connecting frame; 7, upper die; 8, ejector mechanism; 9, guide lubrication mechanism; 10, runner; 11, ejector pin; 81, slide plate; 82, ejector block; 83, guide rod; 84, spring; 85, ball; 86, pressure rod; 91, hollow shell; 92, top ring; 93, sponge sleeve; 94, fixing rod; 95, pressing piece; 96, rubber plug; 97, pull ring; 98, oil leakage hole. DETAILED DESCRIPTION

[0020] 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 the embodiments. 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.

[0021] See also Figure 1-2 An automatic ejection die-casting mold comprises a bottom plate 1, a lower mold 2 is fixedly connected to the middle of the upper end of the bottom plate 1, four corners of the upper end of the bottom plate 1 are fixedly connected to columns 3, and the top of the column 3 is fixedly connected to a top plate 4, a hydraulic cylinder 5 is fixedly installed in the middle of the upper end of the top plate 4, a piston rod of the hydraulic cylinder 5 penetrates the top plate 4 and is slidably connected to the top plate 4, the end of the piston rod is fixedly connected to a connecting frame 6, the bottom of the connecting frame 6 is fixedly connected to an upper mold 7, the upper mold 7 is in contact with the lower mold 2, and a runner 10 is fixedly connected inside the upper mold 7.

[0022] See also Figure 2 The lower die 2 is provided with an ejection mechanism 8 inside. By setting the ejection mechanism 8, the die casting formed in the mold can be automatically ejected, which is convenient for unloading. The ejection mechanism 8 includes a slide plate 81 slidably connected to the lower die 2. The upper end of the slide plate 81 is fixedly connected with an ejection block 82. The ejection block 82 penetrates the lower die 2 and is slidably connected with the lower die 2. The inner side of the lower die 2 is fixedly connected with a guide rod 83. The guide rod 83 penetrates the slide plate 81 and is slidably connected with the slide plate 81. The outer side of the rod body of the guide rod 83 is sleeved with a spring 84. The bottom of the upper die 7 is fixedly connected with a pressure rod 86. The pressure rod 86 is slidably connected with the lower die 2, and the pressure rod 86 contacts the slide plate 81. The side of the slide plate 81 is provided with a ball 85, and the ball 85 is slidably connected with the inner surface of the lower die 2. By setting the ball 85, the relative friction between the slide plate 81 and the lower die 2 can be reduced. One end of the spring 84 is fixedly connected with the slide plate 81, and the other end of the spring 84 is fixedly connected with the inner surface of the lower die 2. By setting the spring 84 , the elastic force can be applied to the ejection block 82 through the slide plate 81 .

[0023] See also Figure 2-4 , a guide lubrication mechanism 9 is provided at the bottom of the top plate 4, and the piston rod of the hydraulic cylinder 5 can be guided and lubricated by the guide lubrication mechanism 9. The guide lubrication mechanism 9 includes a hollow shell 91, which is fixedly connected to the bottom of the top plate 4, and is slidably connected to the piston rod of the hydraulic cylinder 5. A top ring 92 and a sponge sleeve 93 are slidably connected to the inner side of the hollow shell 91, and the top ring 92 and the sponge sleeve 93 are in contact. A fixed rod 94 is fixedly connected to the inner top of the hollow shell 91, and a pressing plate 95 is fixedly connected to the bottom of the fixed rod 94, and the pressing plate 95 is in contact with the sponge sleeve 93. An oil leakage hole 98 is provided on the inner ring wall of the hollow shell 91. A rubber plug 96 is slidably connected to the outer ring wall of the hollow shell 91, and a pull ring 97 is fixedly connected to the outer side of the rubber plug 96. After removing the rubber plug 96, lubricating oil can be added to the hollow shell 91. Two top pins 11 are fixedly connected to the upper end of the connecting frame 6, and the two top pins 11 are symmetrically distributed. By providing the ejector pin 11 , the ejector pin 11 can be inserted into the hollow shell 91 from the bottom.

[0024] The specific implementation process of the utility model is as follows: when in use, the hydraulic cylinder 5 pushes the connecting frame 6 downward, thereby driving the upper mold 7 to move downward, so that the upper mold 7 is fitted with the lower mold 2, and in this process, the pressure rod 86 on the upper mold 7 is inserted into the lower mold 2 and gives a downward pressure to the slide plate 81. At this time, the ejector block 82 on the slide plate 81 is fitted with the lower mold 2, and the spring 84 is compressed, and then the molten material can be transported between the runner 10 and the mold. After the material is formed in the mold, the hydraulic cylinder 5 drives the upper mold 7 to separate from the lower mold 2. At this time, the pressure rod 86 removes the downward pressure on the slide plate 81, and the slide plate 81 and the ejector block 82 will reset upward under the action of the spring 84, and the ejector block 82 will eject the product from the lower mold 2, so as to facilitate demoulding and unloading. In addition, when the hydraulic cylinder 5 drives the upper mold 7 to reset through the connecting frame 6, the ejector pin 11 on the connecting frame 6 can be inserted into the hollow shell 91 from the bottom, and then the sponge sleeve 93 is squeezed to release the lubricating oil, lubricate the piston rod, reduce the wear of the piston rod, and is suitable for continuous production.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic ejection die-casting mold, comprising a base plate (1), characterized in that: The middle part of the upper end of the bottom plate (1) is fixedly connected to a lower die (2), an ejection mechanism (8) is arranged inside the lower die (2), four corners of the upper end of the bottom plate (1) are fixedly connected to columns (3), and the top of the column (3) is fixedly connected to a top plate (4), a hydraulic cylinder (5) is fixedly installed in the middle part of the upper end of the top plate (4), a piston rod of the hydraulic cylinder (5) penetrates the top plate (4) and is slidably connected to the top plate (4), the end of the piston rod is fixedly connected to a connecting frame (6), the bottom of the connecting frame (6) is fixedly connected to an upper die (7), the upper die (7) is in contact with the lower die (2), a flow channel (10) is fixedly connected inside the upper die (7), and a guide lubrication mechanism (9) is arranged at the bottom of the top plate (4).

2. The automatic ejection die-casting mold according to claim 1, characterized in that: The ejection mechanism (8) comprises a slide plate (81) slidably connected to the interior of the lower die (2); an ejection block (82) is fixedly connected to the upper end of the slide plate (81); the ejection block (82) penetrates the lower die (2) and is slidably connected to the lower die (2); a guide rod (83) is fixedly connected to the inner side of the lower die (2); the guide rod (83) penetrates the slide plate (81) and is slidably connected to the slide plate (81); a spring (84) is sleeved on the outer side of the rod body of the guide rod (83); a pressure rod (86) is fixedly connected to the bottom of the upper die (7); the pressure rod (86) is slidably connected to the lower die (2); and the pressure rod (86) contacts the slide plate (81).

3. The automatic ejection die-casting mold according to claim 2, characterized in that: A ball bearing (85) is provided on the side of the slide plate (81), and the ball bearing (85) is slidably connected to the inner surface of the lower mold (2).

4. The automatic ejection die-casting mold according to claim 2, characterized in that: One end of the spring (84) is fixedly connected to the slide plate (81), and the other end of the spring (84) is fixedly connected to the inner surface of the lower mold (2).

5. The automatic ejection die-casting mold according to claim 1, characterized in that: The guide lubrication mechanism (9) comprises a hollow shell (91), wherein the hollow shell (91) is fixedly connected to the bottom of the top plate (4), the hollow shell (91) is slidably connected to the piston rod of the hydraulic cylinder (5), a top ring (92) and a sponge sleeve (93) are slidably connected to the inner side of the hollow shell (91), and the top ring (92) and the sponge sleeve (93) are in contact, a fixing rod (94) is fixedly connected to the inner top of the hollow shell (91), a pressing plate (95) is fixedly connected to the bottom of the fixing rod (94), and the pressing plate (95) is in contact with the sponge sleeve (93), and an oil leakage hole (98) is provided on the inner ring wall of the hollow shell (91).

6. The automatic ejection die-casting mold according to claim 5, characterized in that: The outer ring wall of the hollow shell (91) is slidably connected to a rubber plug (96), and the outer side of the rubber plug (96) is fixedly connected to a pull ring (97).

7. The automatic ejection die-casting mold according to claim 1, characterized in that: Two ejector pins (11) are fixedly connected to the upper end of the connecting frame (6), and the two ejector pins (11) are symmetrically distributed.

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