A safety device for preventing aluminum from escaping from a low-pressure casting machine

Abstract

The present invention relates to the technical field of casting machines, and discloses a low-pressure casting machine anti-aluminum escape safety device, comprising an aluminum liquid storage box and a lower platen. The aluminum liquid storage box is located on the left side of the lower platen, a lower mold is fixedly installed on the top of the lower platen, and mounting guide pillars are fixedly installed on both the left and right sides of the top of the aluminum liquid storage box. The right bottom of the aluminum liquid storage box is connected to a liquid injection pipe with one end passing through the left mounting guide pillar and connected to the lower mold. A solenoid valve located between the aluminum liquid storage box and the lower platen is fixedly installed on the wall of the liquid injection pipe, and the tops of the two mounting guide pillars are fixedly connected to the mounting top plate. The low-pressure casting machine anti-aluminum escape safety device can only be pressurized to inject aluminum normally when the conditions of the high-precision proximity sensing switch and the parameter position conditions of the displacement sensing electronic ruler are met. It can only operate normally and automatically when the hardware and program conditions are met at the same time, providing dual protection, and will not cause safety problems due to human settings, making it safer to use.

Description

Technical Field

[0001] The invention relates to the technical field of casting machines, in particular to an aluminum escape prevention safety device for a low-pressure casting machine. Background Art

[0002] Casting is one of the fundamental processes in the modern machinery manufacturing industry. As a metal heat treatment process, casting has gradually matured in my country. Casting machinery, also known as casting equipment, utilizes this technology to melt metal into a liquid that meets specific requirements, pour it into a mold, and then, after cooling, solidifying, and finishing, produce castings with predetermined shapes, dimensions, and properties.

[0003] Casting machinery is generally classified according to the molding method, and is usually divided into ordinary sand casting and special casting. Ordinary sand casting includes three types: wet sand casting, dry sand casting and chemically hardened sand casting. Special casting can be divided into two categories according to the different molding materials: one type uses natural mineral sand and gravel as the main molding material, such as investment casting, shell casting, negative pressure casting, clay casting, full mold casting and ceramic casting; the other type uses metal as the main casting material, such as metal mold casting, centrifugal casting, continuous casting, pressure casting and low-pressure casting.

[0004] When the existing low-pressure casting machine is used for aluminum injection, a parameter position is set. When the upper platen reaches the set parameter position, aluminum can be pressurized and injected. There is no fixed hardware stroke limit device to control the position and the start of aluminum liquid injection. It is completely determined by manual setting of parameters. For example, due to human lack of skill or replacement of new molds, the parameters are incorrect or the parameters of the new mold are forgotten to be set. The upper and lower molds are not closed tightly, but the position conditions of the parameters set on the upper platen are met. The aluminum liquid injection works normally. In this way, the aluminum liquid will flow out from the gap between the upper and lower molds, causing serious safety hazards of aluminum leakage, which is extremely unsafe to use. Therefore, a low-pressure casting machine anti-aluminum leakage safety device is proposed to solve the above-mentioned problems. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In response to the deficiencies in the prior art, the present invention provides a safety device for preventing aluminum from escaping from a low-pressure casting machine. The device has the advantage of being safe to use and solves the problem that, when using the existing low-pressure casting machine to inject aluminum, a parameter position is set. When the upper platen reaches the set parameter position, aluminum can be pressurized and injected. There is no fixed hardware stroke limit device to control the position and the start of aluminum liquid injection. It is entirely determined by manually set parameters. For example, due to human lack of skill or replacement of a new mold, the parameters are incorrect or the parameters of the new mold are forgotten to be set. The upper and lower molds are not tightly closed, but the position conditions of the parameters set on the upper platen are met. The aluminum liquid injection works normally. In this way, the aluminum liquid will flow out from the gap between the upper and lower molds, causing serious safety hazards of aluminum leakage, which is extremely unsafe to use.

[0007] (2) Technical solution

[0008] In order to achieve the above-mentioned purpose of safe use, the present invention provides the following technical solutions: a low-pressure casting machine anti-aluminum escape safety device, comprising an aluminum liquid storage box and a lower platen, the aluminum liquid storage box is located on the left side of the lower platen, a lower mold is fixedly installed on the top of the lower platen, mounting guide pillars are fixedly installed on the left and right sides of the top of the aluminum liquid storage box, the right bottom of the aluminum liquid storage box is connected to a liquid injection pipe with one end passing through the left mounting guide pillar and connected to the lower mold, a solenoid valve located between the aluminum liquid storage box and the lower platen is fixedly installed on the tube wall of the liquid injection pipe, the tops of the two mounting guide pillars are fixedly connected to the mounting top plate, a mounting plate is fixedly installed on the bottom of the mounting top plate and between the two mounting guide pillars, and the outer side of the mounting plate is movably mounted It is equipped with a displacement sensing electronic ruler, and the upper platen oil cylinders are fixedly installed on the left and right sides of the top of the mounting top plate. The output end of the upper platen oil cylinder is fixedly installed with a push column with one end passing through and extending to the bottom of the mounting top plate. The bottoms of the two push columns are fixedly connected to the upper platen, and the left and right ends of the two upper plates extend to the interior of the two mounting guide columns respectively and are movably connected to the mounting guide columns. The bottom of the upper platen is fixedly installed with an upper mold, and the top mold oil cylinder is fixedly installed on the top of the upper platen. The inner left side of the platen and the inner left side of the upper mold are fixedly installed with a two-way reset guide column, and the left side of the push column on the left is fixedly installed with a high-precision proximity sensing switch located above the two-way reset guide column on the top.

[0009] Preferably, the input end of the displacement sensing electronic ruler is electrically connected to the output end of the input module, the output ends of the displacement sensing electronic ruler and the high-precision proximity sensing switch are both electrically connected to the input end of the PLC, and the output end of the PLC is electrically connected to the input end of the solenoid valve.

[0010] Preferably, the upper mold consists of a mounting block and a pressing module. There are two mounting blocks and the pressing module is fixed between the two mounting blocks. The bottom of the pressing module is arc-shaped, and the bidirectional reset guide column at the bottom is located in the mounting block on the left.

[0011] Preferably, a slide groove is provided on one side opposite to the two installation guide pillars, and the left and right sides of the upper platform extend into the slide groove and are movably connected to the installation guide pillars through the slide groove.

[0012] Preferably, the bidirectional reset guide column includes two metal mounting plates, a mounting sleeve rod is fixedly installed on the top of the bottom metal mounting plate, a guide slider is movably installed between the left and right sides of the inner wall of the mounting sleeve rod, and a movable strut is fixedly installed on the top of the guide slider and extends to the top of the mounting sleeve rod and is fixedly connected to the top metal mounting plate. The outer sleeve of the movable strut is provided with a reset spring fixed between the top metal mounting plate and the mounting sleeve rod.

[0013] Preferably, the interior of the mounting sleeve rod is hollow, and an opening is provided at the top of the inner wall of the mounting sleeve rod.

[0014] Preferably, the diameters of the guide slider and the return spring are both larger than the diameter of the opening, and the diameter of the movable strut matches the diameter of the opening.

[0015] Preferably, the interior of the lower mold is hollow, and a liquid injection hole adapted to the liquid injection tube is opened on the left side of the inner wall of the lower mold.

[0016] Preferably, the installation guide columns are symmetrically distributed, and the installation guide columns, the lower platform and the installation top plate are an integrated structure.

[0017] (3) Beneficial effects

[0018] Compared with the prior art, the present invention provides a low-pressure casting machine anti-aluminum escape safety device, which has the following beneficial effects:

[0019] The low-pressure casting machine anti-aluminum escape safety device sets a displacement sensing electronic ruler and a high-precision proximity sensing switch, uses an input module to set the displacement detection parameters of the displacement sensing electronic ruler, starts the upper platen cylinder and pushes the upper die on the upper platen to move downward between the two mounting guide pillars through the push column. When the upper die and the lower die are pressed together and the displacement detection parameters of the displacement sensing electronic ruler are met, the two-way reset guide pillar in the upper die is compressed and reset to extrude the two-way reset guide pillar in the upper platen. The two-way reset guide pillar in the upper platen resets and extrude the high-precision proximity sensing switch. When the high-precision proximity sensing switch senses the top two-way reset guide pillar, it sends a signal to the PLC, and the PLC controls the solenoid valve to open, realizing automatic pressurized injection of molten aluminum. Only when the conditions of the high-precision proximity sensing switch and the parameter position conditions of the displacement sensing electronic ruler are met, can the aluminum be pressurized and injected normally. When the hardware and program conditions are met at the same time, it can operate normally and automatically, providing double protection, and will not cause safety problems due to human settings, making it safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a low-pressure casting machine aluminum escape prevention safety device proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of a safety device for preventing aluminum from escaping from a low-pressure casting machine proposed by the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of a two-way reset guide column of an anti-aluminum escape safety device for a low-pressure casting machine proposed by the present invention.

[0023] In the figure: 1 aluminum liquid storage tank, 2 lower platen, 3 lower mold, 4 liquid injection pipe, 5 solenoid valve, 6 mounting guide column, 7 mounting top plate, 8 mounting plate, 9 displacement sensor electronic ruler, 10 upper platen cylinder, 11 push column, 12 upper platen, 13 upper mold, 14 top mold cylinder, 15 two-way reset guide column, 151 metal mounting plate, 152 mounting sleeve rod, 153 guide slider, 154 movable support rod, 155 reset spring, 16 high-precision proximity sensor switch, 17 input module, 18 PLC. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-3, a low-pressure casting machine anti-aluminum escape safety device, including an aluminum liquid storage tank 1 and a lower platen 2, the aluminum liquid storage tank 1 adopts a pressurized liquid injection method to inject liquid through an injection pipe 4, the aluminum liquid storage tank 1 is located on the left side of the lower platen 2, and a lower mold 3 is fixedly installed on the top of the lower platen 2. Mounting guide pillars 6 are fixedly installed on the left and right sides of the top of the aluminum liquid storage tank 1. The right bottom of the aluminum liquid storage tank 1 is connected to a liquid injection pipe 4 with one end passing through the left mounting guide pillar 6 and connected to the lower mold 3. The interior of the lower mold 3 is hollow, and a liquid injection hole adapted to the liquid injection pipe 4 is opened on the left side of the inner wall of the lower mold 3. A solenoid valve 5 located between the aluminum liquid storage tank 1 and the lower plate 2 is fixedly installed on the wall of the liquid pipe 4. The tops of the two mounting guide pillars 6 are fixedly connected to the mounting top plate 7. The mounting guide pillars 6 are symmetrically distributed. The mounting guide pillars 6, the lower plate 2 and the mounting top plate 7 are an integrated structure. A mounting plate 8 is fixedly installed on the bottom of the mounting top plate 7 and located between the two mounting guide pillars 6. A displacement sensor electronic ruler 9 is movably installed on the outside of the mounting plate 8. An upper plate oil cylinder 10 is fixedly installed on both sides of the top of the mounting top plate 7. The output end of the upper plate oil cylinder 10 is fixedly installed with one end. The push column 11 runs through and extends to the bottom of the installation top plate 7. The bottoms of the two push columns 11 are fixedly connected to the upper plate 12. The left and right ends of the two upper plates 12 extend to the inside of the two installation guide columns 6 and are movably connected to the installation guide columns 6. The bottom of the upper plate 12 is fixedly installed with an upper mold 13. The top of the inner wall of the upper mold 13 is fixedly installed with a heat insulation material. The heat insulation material is asbestos wool. In this way, the temperature of the upper plate 12 will be very low and will not affect the use of the top mold cylinder 14 and other electrical components on the upper plate 12. The upper mold 13 is composed of a mounting block and a pressing module. There are two mounting blocks and the pressing module is fixed between the two mounting blocks. The bottom of the pressing module is arc-shaped. The bottom two-way reset guide column 15 is located in the left mounting block. The top of the upper platen 12 is fixedly installed with a top mold cylinder 14. The inner left side of the platen 12 and the inner left side of the upper mold 13 are both fixedly installed with two-way reset guide columns 15. The left side of the left push column 11 is fixedly installed with a high-precision proximity sensor switch 16 located above the top two-way reset guide column 15. The accuracy range of the high-precision proximity sensor switch 16 is between -0.5mm and +0.5mm.

[0026] The input end of the displacement sensing electronic ruler 9 is electrically connected to the output end of the input module 17. The output ends of the displacement sensing electronic ruler 9 and the high-precision proximity sensing switch 16 are both electrically connected to the input end of the PLC 18. The output end of the PLC 18 is electrically connected to the input end of the solenoid valve 5. The displacement detection parameters of the displacement sensing electronic ruler 9 are set using the input module 17. The upper platen cylinder 10 is started and pushes the upper mold 13 on the upper platen 12 downward between the two mounting guide pillars 6 through the push column 11. When the upper mold 13 and the lower mold 3 are pressed together and the displacement detection parameters of the displacement sensing electronic ruler 9 are met, the two-way reset guide pillar 15 in the upper mold 13 is compressed and reset to squeeze the two-way reset guide pillar 15 in the upper platen 12. The two-way reset guide pillar 15 in the upper platen 12 resets and squeezes the high-precision proximity sensing switch 16. When the high-precision proximity sensing switch 16 senses the top two-way reset guide pillar 15, it sends a signal to the PLC 18, and the PLC 18 controls the solenoid valve 5 to open. The automatic pressurized injection of molten aluminum is realized. Only when the conditions of the high-precision proximity sensing switch 16 and the parameter position conditions of the displacement sensing electronic ruler 6 are met, can the aluminum be pressurized and injected normally. Only when the hardware and program conditions are met at the same time can the aluminum be automatically operated normally, which plays a double protection role and will not cause safety problems due to human settings. It is safer to use and solves the problem that the existing low-pressure casting machine sets a parameter position when injecting aluminum. When the upper platen reaches the set parameter position, aluminum can be pressurized and injected. There is no fixed hardware stroke limit device to control the position and the start of aluminum liquid injection. It is completely determined by the parameters set by humans. For example, due to human lack of skill or replacement of new molds, the parameters are incorrect or the parameters of the new mold are forgotten to be set. The upper and lower molds are not closed tightly, but the position conditions of the parameters set on the upper platen are met. The aluminum liquid injection works normally. In this way, the aluminum liquid will flow out from the gap between the upper and lower molds, which will cause serious safety hazards of aluminum leakage and is extremely unsafe to use.

[0027] The bidirectional reset guide column 15 includes two metal mounting plates 151, and a mounting sleeve rod 152 is fixedly installed on the top of the bottom metal mounting plate 151. The interior of the mounting sleeve rod 152 is hollow, and an opening is provided at the top of the inner wall of the mounting sleeve rod 152. A guide slider 153 is movably installed between the left and right sides of the inner wall of the mounting sleeve rod 152. A movable strut 154 is fixedly installed on the top of the guide slider 153 and extends to the top of the mounting sleeve rod 152 and is fixedly connected to the top metal mounting plate 151. The outside of the movable strut 154 is sheathed with a reset spring 155 fixed between the top metal mounting plate 151 and the mounting sleeve rod 152. The diameters of the guide slider 153 and the reset spring 155 are both larger than the diameter of the opening, and the diameter of the movable strut 154 matches the diameter of the opening.

[0028] In summary, the low-pressure casting machine anti-aluminum escape safety device, by setting the displacement sensing electronic ruler 9 and the high-precision proximity sensing switch 16, uses the input module 17 to set the displacement detection parameters of the displacement sensing electronic ruler 9, the upper platen oil cylinder 10 is started and pushes the upper die 13 on the upper platen 12 to move downward between the two mounting guide pillars 6 through the push column 11, when the upper die 13 and the lower die 3 are pressed together and the displacement detection parameters of the displacement sensing electronic ruler 9 are met, the two-way reset guide pillar 15 in the upper die 13 is compressed and reset to extrude the two-way reset guide pillar 15 in the upper platen 12, the two-way reset guide pillar 15 in the upper platen 12 resets and extrude the high-precision proximity sensing switch 16, when the high-precision proximity sensing switch 16 senses the top two-way reset guide pillar 15 to give a signal to the PLC18, the PLC18 controls the solenoid valve 5 to open, and realizes the automatic pressurized injection of aluminum liquid. When the conditions of the proximity sensor switch 16 and the parameter position conditions of the displacement sensor electronic ruler 6 are met, the aluminum can be pressurized and injected normally. When the hardware and program conditions are met at the same time, the aluminum can be automatically operated normally, which plays a double protection role and will not cause safety problems due to human settings. It is safer to use and solves the problem that the existing low-pressure casting machine sets a parameter position when injecting aluminum. When the upper platen reaches the set parameter position, aluminum can be pressurized and injected. There is no fixed hardware stroke limit device to control the position and the start of aluminum liquid injection. It is entirely determined by the parameters set by humans. For example, due to human lack of skill or replacement of new molds, the parameters are incorrect or the parameters of the new mold are forgotten to be set. The upper and lower molds are not closed tightly, but the position conditions of the parameters set on the upper platen are met. The aluminum liquid injection works normally. In this way, the aluminum liquid will flow out from the gap between the upper and lower molds, causing serious safety hazards of aluminum running, which is extremely unsafe to use.

[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0030] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A low-pressure casting machine anti-aluminum escape safety device, comprising an aluminum liquid storage tank (1) and a lower platen (2), characterized in that: The aluminum liquid storage box (1) is located on the left side of the lower platen (2), and a lower mold (3) is fixedly installed on the top of the lower platen (2). Mounting guide pillars (6) are fixedly installed on the left and right sides of the top of the aluminum liquid storage box (1). The right bottom of the aluminum liquid storage box (1) is connected to a liquid injection pipe (4) with one end passing through the left mounting guide pillar (6) and connected to the lower mold (3). A solenoid valve (5) located between the aluminum liquid storage box (1) and the lower platen (2) is fixedly installed on the tube wall of the liquid injection pipe (4). The tops of the two mounting guide pillars (6) are fixedly connected to the mounting top plate (7). A mounting plate (8) is fixedly installed on the bottom of the mounting top plate (7) and located between the two mounting guide pillars (6). A displacement sensor electronic ruler (9) is movably installed on the outer side of the mounting plate (8). The left and right sides of the top of the mounting top plate (7) are fixedly installed. An upper platen oil cylinder (10) is fixedly installed at the output end of the upper platen oil cylinder (10) with one end penetrating and extending to the bottom of the mounting top plate (7). The bottoms of the two pushing columns (11) are fixedly connected to the upper platen (12). The left and right ends of the two upper plates (12) extend to the interior of the two mounting guide columns (6) respectively and are movably connected to the mounting guide columns (6). An upper mold (13) is fixedly installed at the bottom of the upper platen (12). A top mold oil cylinder (14) is fixedly installed at the top of the upper platen (12). A two-way reset guide column (15) is fixedly installed on the left side of the interior of the platen (12) and the left side of the interior of the upper mold (13). A high-precision proximity sensing switch (16) located above the top two-way reset guide column (15) is fixedly installed on the left side of the left pushing column (11).

2. The anti-aluminum escape safety device for a low-pressure casting machine according to claim 1, characterized in that: The input end of the displacement sensing electronic ruler (9) is electrically connected to the output end of the input module (17), the output ends of the displacement sensing electronic ruler (9) and the high-precision proximity sensing switch (16) are both electrically connected to the input end of the PLC (18), and the output end of the PLC (18) is electrically connected to the input end of the solenoid valve (5).

3. The anti-aluminum escape safety device for a low-pressure casting machine according to claim 1, characterized in that: The upper die (13) is composed of a mounting block and a pressing die block. There are two mounting blocks and the pressing die block is fixed between the two mounting blocks. The bottom of the pressing die block is arc-shaped, and the two-way reset guide column (15) at the bottom is located in the left mounting block.

4. The anti-aluminum escape safety device for a low-pressure casting machine according to claim 1, characterized in that: A sliding groove is provided on the opposite side of the two installation guide pillars (6), and the left and right sides of the upper platform (12) extend into the sliding groove and are movably connected to the installation guide pillars (6) through the sliding groove.

5. The anti-aluminum escape safety device for a low-pressure casting machine according to claim 1, characterized in that: The bidirectional reset guide column (15) comprises two metal mounting plates (151), a mounting sleeve rod (152) is fixedly mounted on the top of the bottom metal mounting plate (151), a guide slider (153) is movably mounted between the left and right sides of the inner wall of the mounting sleeve rod (152), a movable support rod (154) is fixedly mounted on the top of the guide slider (153), one end of the movable support rod (154) extends to the top of the mounting sleeve rod (152) and is fixedly connected to the top metal mounting plate (151), and a reset spring (155) is sleeved on the outside of the movable support rod (154) and is fixed between the top metal mounting plate (151) and the mounting sleeve rod (152).

6. The anti-aluminum escape safety device for a low-pressure casting machine according to claim 5, characterized in that: The interior of the installation sleeve rod (152) is hollow, and an opening is provided at the top of the inner wall of the installation sleeve rod (152).

7. The anti-aluminum escape safety device for a low-pressure casting machine according to claim 6, characterized in that: The diameters of the guide slider (153) and the return spring (155) are both larger than the diameter of the opening, and the diameter of the movable support rod (154) matches the diameter of the opening.

8. The anti-aluminum escape safety device for a low-pressure casting machine according to claim 1, characterized in that: The interior of the lower mold (3) is hollow, and a liquid injection hole adapted to the liquid injection pipe (4) is provided on the left side of the inner wall of the lower mold (3).

9. The anti-aluminum escape safety device for a low-pressure casting machine according to claim 1, characterized in that: The installation guide columns (6) are symmetrically distributed, and the installation guide columns (6) are an integrated structure with the lower platform (2) and the installation top plate (7).

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