Anti-damage prepressing screw die-casting device and using method

Abstract

The invention provides an anti-damage prepressing screw die-casting device and a using method, and belongs to the technical field of screw die-casting. Comprising a device body, a mounting table is arranged on the inner side of the middle of the device body, a die-casting module is arranged at the upper end of the mounting table, guide columns are arranged at the four corners of the upper end of the mounting table, hydraulic columns are arranged at the upper end of the mounting table, and a feeding module is arranged in the middle of the rear end of the device body; clamping and sealing modules are arranged on the left side and the right side of the outer end of the device body. According to the vertical die-casting equipment, through the arrangement of the mounting table and the guide column, the die-casting module is vertically mounted in the device body instead of being mounted on the side in a traditional mode, power is provided by matching with the upper hydraulic column and the jacking device at the bottom, the vertical die-casting equipment simple in structure is formed, and compared with a traditional flat-lying type die-casting screw machine, the occupied area is reduced, and meanwhile the production efficiency is improved. And meanwhile, when small-batch production and processing are carried out, the operation cost of the equipment is not high, and the equipment is more economical and practical.

Description

Technical Field

[0001] The present invention relates to the technical field of screw die-casting, and particularly relates to a screw die-casting device with anti-damage and pre-pressing functions and a usage method thereof. Background Art

[0002] Die-cast screws are cylinders or circular hole structures with spiral grooves, and achieve the fastening function through the frictional force generated by rotation. They are indispensable industrial necessities in daily life and are widely used in various fields. For example, extremely small screws are used in electronic products, general screws are used in furniture, etc., large screws are used in engineering, construction, and bridges, and screws are also widely used for connection and fastening in various industrial equipment.

[0003] Currently, existing die-cast screws are mostly produced by die-casting process during production, which requires the use of a screw die-casting machine. The die-casting screw machine generally first injects molten metal materials (such as zinc alloy, aluminum alloy, etc.) into a specific mold cavity under high pressure. After cooling and solidification, screws with precise shapes and sizes are formed. Most existing die-casting screw machines are of a flat-lying structure. For example, a hot-pressing forming feeding device and a hot-pressing forming mechanism disclosed in Chinese Patent No. CN119772049A, although having high production efficiency, not only occupy a large overall area, but also have high production costs for screw die-casting production. For small-batch production, the mold cost and equipment operation cost allocated to each product are relatively high, and the overall efficiency is not economical. At the same time, since die-cast screws will generate higher thermal stress and mechanical stress on the mold, it will accelerate the wear and deformation of the mold, which will lead to problems with the mold sealing performance. Subsequently, metal liquid leakage is likely to occur during die-casting, posing certain production risks. Secondly, when the existing die-cast screws are ejected by the ejection structure after solidification, the generated ejection force directly contacts the formed screws, lacking a certain buffer structure. As a result, when the formed screws are ejected, the contact end is prone to certain deformation, resulting in a decrease in the quality of the formed screws. Therefore, the present application provides a screw die-casting device with anti-damage and pre-pressing functions and a usage method to meet the requirements. Summary of the Invention

[0004] (I) Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides a screw die-casting device with anti-damage and pre-pressing functions and a usage method thereof, which solves the problems that the existing die-casting screw machine is not economical for small-batch production, at the same time, the die-casting mold is prone to sealing problems, posing certain production risks, and secondly, the stressed end of the formed screw is prone to deformation when ejected.

[0005] (II) Technical Solutions To solve the above technical problems, the present invention provides the following technical solutions: An anti-loss and pre-pressable screw die-casting device, comprising a device body. Inside the middle of the device body, there is an installation table. At the upper end of the installation table, there is a die-casting module. At the four corners of the upper end of the installation table, there are guide columns. At the upper end of the installation table, there is a hydraulic column. In the middle of the rear end of the device body, there is a feeding module. On the left and right sides of the outer end of the device body, there are clamping and sealing modules. Below the front end of the device body, there is a control console. At the lower end inside the device body, there is a jacking device. At the lower end inside the die-casting module, there is a buffer module.

[0006] Preferably, the installation table includes a support plate, a lower pressing plate, an installation groove, a guide hole, a clamping block, and a central hole. Above the support plate, there is a lower pressing plate. In the middle of the upper end of the support plate, there is a longitudinally opened installation groove. On the left and right sides of the installation groove, there are guide holes. At the four corners of the outer end of the support plate, there are clamping blocks. In the middle of the upper end of the support plate, there is a central hole.

[0007] Preferably, the die-casting module includes a forming die, a lower pressing die, a bottom plate, a forming cavity, an injection block, a positioning hole, a positioning column, and a liquid inlet hole. Above the forming die, there is a lower pressing die. At the lower end of the forming die, there is a bottom plate. Inside the upper end of the forming die, there is a formed cavity. At the lower end of the lower pressing die, there is an injection block. At the four corners of the upper end of the forming die, there are positioning holes. At the four corners of the lower end of the lower pressing die, there are positioning columns. In the middle of the rear end of the lower pressing die, there is a liquid inlet hole.

[0008] Preferably, the feeding module includes a mounting plate, a heat preservation box, a liquid storage tank, a piston pressure pipe, a telescopic feeding pipe, an electric heating pipe, and a feeding control box. At the rear end of the mounting plate, there is a heat preservation box. In the middle of the rear end of the heat preservation box, there is a liquid storage tank. At the rear side of the upper end of the liquid storage tank, there is a piston pressure pipe. In the middle of the front end of the mounting plate, there is a telescopic feeding pipe. At the upper end of the heat preservation box, there is an electric heating pipe. On the right side of the rear end of the heat preservation box, there is a feeding control box.

[0009] Preferably, the clamping and sealing module includes an outer fixing plate, an electric push rod, an inner fixing plate, a spring abutting rod, a clamping plate, a pre-pressing plate, and a compression spring. In the middle of the rear end of the outer fixing plate, there is an electric push rod. Inside the front end of the outer fixing plate, there is an inner fixing plate. In the middle of the inner side of the inner fixing plate, there is a spring abutting rod. At the front end of the spring abutting rod, there is a clamping plate. Inside the front end of the clamping plate, there is a pre-pressing plate. On the upper and lower sides of the outer end of the pre-pressing plate, there are compression springs.

[0010] Preferably, the buffer module includes an ejecting plate, a sleeve, an ejecting plug, a buffer spring, and a connecting column. At the upper end of the ejecting plate, there is a sleeve. Inside the sleeve, there is an ejecting plug. On the outer side of the lower end of the ejecting plug, there is a buffer spring. In the middle of the lower end of the ejecting plate, there is a connecting column.

[0011] Preferably, the mounting table is composed of two upper and lower parts, and the overall size and shape of the upper and lower parts are the same. The upper and lower ends of the die-casting module are respectively reinforced with the upper and lower parts of the mounting table. The hydraulic columns consist of four external columns and one central column to form a complete hydraulic system, and are respectively fixedly installed at the top of the upper part of the mounting table. Two groups of the sealing modules are symmetrically distributed on the left and right. The upper end of the jacking device is connected to the lower end of the buffer module.

[0012] Preferably, the heat preservation box, the liquid storage tank, the piston pressure pipe and the telescopic feeding pipe are all interconnected. The front end of the liquid storage tank extends into the interior of the heat preservation box. The part of the electric heating pipe extending into the inner side of the heat preservation box is distributed in a surrounding manner outside the liquid storage tank extending into the interior of the heat preservation box.

[0013] Preferably, the installation directions of the outer fixing plate and the inner fixing plate are exactly opposite, and the two are reinforced by bolts. The front end of the electric push rod is spliced with the rear end of the spring abutment rod. The pre-pressure plates are symmetrically distributed on the left and right sides inside the front end of the clamping plate. The pre-pressure plate is composed of two upper and lower trapezoidal plates, and the upper and lower ends of the two trapezoidal plates are symmetrically installed with extrusion springs. The extrusion springs are distributed in a horizontal array.

[0014] A usage method of a damage-proof and pre-pressable screw die-casting device includes the following steps: Step 1, mold installation: Through the installation grooves opened at the upper end of the support plate and the lower end of the lower pressing plate, the lower pressing mold and the bottom plate in the die-casting module are fixedly installed with the support plate and the lower pressing plate, and then the forming mold is reinforced with the bottom plate. Among them, the forming mold, the lower pressing mold and the bottom plate are vertically installed at an angle. Step 2, ejection connection: Through the set connecting column, the upper end of the connecting column passes through the central hole opened in the middle of the support plate and the hole opened in the middle of the bottom plate, so that the upper end of the connecting column fits against the lower end of the ejection plate, and then the contact ends of the two are reinforced by bolts. Then the jacking device is started, and its upper end extends. When it contacts the lower end of the connecting column, it is reinforced to form an integral structure. Step 3, mold closing: The external hydraulic equipment connected to the hydraulic columns is controlled by the console to work, so that the hydraulic columns press down to drive the lower pressing plate to move downward, driving the lower pressing mold to close with the forming mold. Step 4, sealing and clamping: The electric push rods arranged on the left and right sides of the outer end of the device body start to work, pushing the left and right spring abutment rods forward, driving the symmetrically distributed clamping plates to be spliced with each other. During the splicing process, the pre-pressure plates located inside the clamping plates will first contact and expand with the contact ends of the forming mold and the lower pressing mold, and then under the action of the extrusion springs, the pre-pressure plates squeeze and clamp the contact ends of the molds from the upper and lower ends, forming a relatively sealed protection structure outside the die-casting module. Step 5: Preheat the mold. Inject heat medium into the liquid storage tank, and then squeeze the heat medium inside the liquid storage tank under the action of the piston pressure tube to let it enter the insulation box. While squeezing, the pressure will also drive the telescopic feeding tube to extend forward. When the front end of the telescopic feeding tube is connected with the liquid inlet hole at the rear end of the pressing mold, the inner open petal mouth opened on the inner side of the front end of the telescopic feeding tube will be squeezed due to the conical head inside the liquid inlet hole. At this time, the telescopic feeding tube will be connected with the internal cavity of the pressing mold, so that the heat medium can enter the cavity. When the pressure is provided later, the heat medium will also enter the molding cavity along the injection block, so as to start preheating the die-casting module. Step 6: Open the mold and spray the release agent. When the preheating work is completed, the heat medium in the die-casting module is extracted by reversing the piston pressure tube, and then the heat medium is discharged through the drain port at the lower end of the liquid storage tank, and the clamping and sealing module is separated. The hydraulic column works in reverse to separate the forming mold from the lower pressure mold, and then the inner cavity of the lower pressure mold and the forming cavity of the forming mold are blown dry. After the drying is completed, the mold release agent is sprayed in the forming cavity, and then steps 3 and 4 are repeated; Step 7, screw die casting, after the heat medium is drained, the inside of the liquid storage tank is blown dry, and the casting liquid is injected after the inside is dry, and then the pressure is applied by the injection piston in the piston pressure tube to inject the casting liquid into the forming mold, so that the casting liquid quickly fills the inside of the forming cavity. After the casting liquid fills the forming cavity, the injection piston continues to maintain a certain pressure, so that the casting liquid crystallizes and solidifies under the action of pressure; Step 8. Open the mold and take out the casting. When the screw is solidified and formed in the molding cavity, separate the die-casting module. After the molding mold and the lower pressure mold are separated, the pressure acting on the upper end of the ejector plug disappears. Then, under the action of the lifter and the connecting column, the ejector plate is pushed upward to apply pressure to the buffer spring. Under the action of the pressure from below, the buffer spring drives the ejector plug to move upward, ejecting the formed screw from the molding cavity, thereby taking out the casting.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, the die-casting module is changed from a traditional side-lying installation to a vertical installation inside the device body by setting up a mounting table and guide columns, and is matched with a hydraulic column and a bottom jack to provide power to form a vertical die-casting equipment with a simple structure. Compared with the traditional flat-lying die-casting screw machine, the footprint is reduced and the overall cost of the equipment will be lower. At the same time, when carrying out small-batch production and processing, the operating cost of the equipment is not high, which will be more economical.

[0016] Through the set clamping and sealing module, when the forming die and the lower pressing die in the die-casting module are closed, the two electric push rods on both sides work together, driving the spring rods on both sides to displace at the same time, pushing the clamping plates on both sides towards the middle for docking. During the docking process, the pre-pressing plates located inside the clamping plates will first contact and expand with the contact ends of the forming die and the lower pressing die. When the docking is completed, under the action of the compression spring, the pre-pressing plates pre-press and clamp the contact ends of the die from the upper and lower ends, making all parts of the die fit better, reducing the gap, and avoiding the leakage of molten metal during die-casting. At the same time, the clamped plates docked together will form a relatively sealed protective structure outside the die-casting module. Even if there is a leakage of molten metal, it will not directly burst out, reducing the probability of danger and improving production safety.

[0017] Through the set buffer module, when the die-casting screw needs to be taken out after solidification, the jacking device increases the power, driving the connecting column to displace upward and pushing the ejector plate upward. When the ejector plate is pushed upward, the buffer spring inside the sleeve will be compressed. Due to its own characteristics, when the buffer spring is compressed, it will release the compression force upward, driving the top of the ejector plug to apply an upward force to the bottom of the die-cast screw formed inside the forming cavity, thereby ejecting the formed screw. During the entire ejection process, the ejection force is buffered once by the buffer spring, avoiding directly applying a large force when ejecting the formed screw, which may cause deformation and cracking of the formed screw, and improving the production quality of the formed screw. Brief Description of the Drawings

[0018] Figure 1 It is a three-dimensional structure schematic diagram of the present invention; Figure 2 It is a planar structure schematic diagram of the present invention; Figure 3 It is a three-dimensional structure schematic diagram of the installation table of the present invention; Figure 4 It is a three-dimensional structure schematic diagram of the die-casting module and the buffer module of the present invention; Figure 5 It is a three-dimensional installation structure schematic diagram of the installation table and the die-casting module of the present invention; Figure 6 It is a three-dimensional structure schematic diagram of the feeding module of the present invention; Figure 7 It is a three-dimensional structure schematic diagram of the clamping and sealing module of the present invention; Figure 8 It is a three-dimensional structure schematic diagram of the back of the die-casting module of the present invention; Figure 9 It is a sectional structure schematic diagram of the die-casting module of the present invention.

[0019] [Reference Numerals] 1. Device body; 2. Installation table; 3. Die-casting module; 4. Guide pillar; 5. Hydraulic column; 6. Feeding module; 7. Clamping and sealing module; 8. Console; 9. Jack; 10. Buffer module; 201. Support plate; 202. Lower pressing plate; 203. Installation groove; 204. Guide hole; 205. Block; 206. Central hole; 301. Forming die; 302. Lower pressing die; 303. Bottom plate; 304. Forming cavity; 305. Injection block; 306. Positioning hole; 307. Positioning column; 308. Liquid inlet hole; 601. Installation plate; 602. Heat preservation box; 603. Liquid storage tank; 604. Piston pressure pipe; 605. Telescopic feeding pipe; 606. Electric heating pipe; 607. Feeding control box; 701. Outer fixing plate; 702. Electric push rod; 703. Inner fixing plate; 704. Spring abutting rod; 705. Clamping plate; 706. Pre-pressing plate; 707. Extrusion spring; 101. Ejector plate; 102. Sleeve; 103. Ejector plug; 104. Buffer spring; 105. Connecting column.

[0020] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure. However, this is only for schematic needs and is not intended to limit the present invention to this specific structure, device, and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments, and the adjustments or modifications still fall within the scope of the appended claims. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0022] Next, a screw die-casting device with anti-damage and pre-pressurization and its usage method provided by the present invention will be described in detail in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0023] It should be noted that in the specification, references to "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Additionally, when a particular feature, structure, or characteristic is described in connection with an embodiment, implementing such feature, structure, or characteristic in connection with other embodiments (whether or not explicitly described) should be within the knowledge of those skilled in the relevant art.

[0024] Generally, terms can be understood, at least in part, from their use in the context. For example, at least in part depending on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood to not necessarily be intended to convey a set of exclusive factors, but rather, at least in part depending on the context, can allow for the existence of other factors that are not necessarily explicitly described.

[0025] It can be understood that the meanings of "on", "above", and "over" in the present disclosure should be interpreted in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but also can include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0026] Furthermore, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. are used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the figures. Spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the figures. The device can be oriented in other ways, and the spatial relative descriptors used herein can be interpreted accordingly.

[0027] As Figures 1 to 9As shown in the figure, an embodiment of the present invention provides a screw die-casting device with anti-loss and pre-pressurization functions, including a device body 1. The device body 1 is integrally installed in a vertical structure. An installation table 2 is embedded and installed inside the middle of the device body 1. The installation table 2 consists of two upper and lower parts, and the overall size and shape of the two upper and lower parts are the same. A die-casting module 3 is bolted to the upper end of the installation table 2. The upper and lower ends of the die-casting module 3 are respectively reinforced with the two upper and lower parts of the installation table 2. Guide columns 4 are sleeved at the four corners of the upper end of the installation table 2. A hydraulic column 5 is bolted and reinforced at the upper end of the installation table 2. The hydraulic column 5 consists of four external and one central column to form a complete hydraulic system, and multiple hydraulic columns 5 are respectively fixedly installed with the top end of the upper part of the installation table 2. A feeding module 6 is bolted and reinforced in the middle of the rear end of the device body 1. Clamping and sealing modules 7 are bolted on the left and right sides of the outer end of the device body 1. There are two groups of clamping and sealing modules 7 distributed symmetrically left and right. A control console 8 is screwed at the lower part of the front end of the device body 1. A jacking device 9 is clamped and installed at the lower end inside the device body 1. The upper end of the jacking device 9 is connected to the lower end of a buffer module 10. A buffer module 10 is embedded and installed at the lower end inside the die-casting module 3.

[0028] By setting the installation table 2, since installation grooves 203 are provided on the opposite surfaces of its upper and lower ends, only the necessary power needs to be provided by the hydraulic column 5 to adjust the distance between the upper and lower installation tables 2 to an appropriate height, and then the die-casting module 3 will be pushed into the inner side of the device body 1 along the installation grooves 203. After fixing the installation position of the die-casting module 3 in the central area, it is tightened and reinforced with bolts. Subsequently, the electric push rods 702 provided on the left and right sides of the outer end of the device body 1 start to work, pushing the left and right spring rods 704 forward, driving the symmetrically distributed clamping plates 705 to be spliced together. During the splicing process, the pre-pressing plates 706 located inside the clamping plates 705 will first come into contact and expand with the contact ends of the forming die 301 and the lower pressing die 302, and then under the action of the compression springs 707, the pre-pressing plates 706 will squeeze and clamp the contact ends of the die from the upper and lower ends, forming a relatively sealed protective structure outside the die-casting module 3. Then, through the control console 8, the feeding module 6 is operated to start working. After its front-end liquid injection structure is hermetically docked with the liquid inlet hole 308 opened at the rear end of the upper-end structure of the die-casting module 3, it provides casting liquid and pressure, allowing the casting liquid to be quickly pressed into and filled in the cavity inside the die-casting module 3. Then, the feeding module 6 continues to maintain pressure until the metal liquid solidifies and forms. After the bolt is formed, the above-mentioned clamping and sealing module 7 is operated in reverse to open the protective structure, and the die-casting module 3 is separated. The jacking device 9 provides power to push the buffer module 10 inside the lower-end structure of the die-casting module 3 to provide an upward force on the solidified formed screw, thus completing the ejection work of the formed screw.

[0029] As Figure 1 、 Figure 2 andFigure 3 As shown in the figure, in this embodiment, the mounting table 2 includes a support plate 201, a lower pressing plate 202, a mounting groove 203, a guide hole 204, a clamping block 205, and a central hole 206. A lower pressing plate 202 is provided above the support plate 201. A mounting groove 203 is longitudinally opened in the middle of the upper end of the support plate 201. Guide holes 204 are opened on the left and right sides of the mounting groove 203. Clamping blocks 205 are provided at the four corners of the outer end of the support plate 201. A central hole 206 is opened in the middle of the upper end of the support plate 201.

[0030] The support plate 201 and the lower pressing plate 202 are equal in size and shape to each other. The only difference is the central hole 206 opened in the middle of the support plate 201, while the lower pressing plate 202 is complete. The mounting grooves 203 are symmetrically opened at the upper end of the support plate 201 and the lower end of the lower pressing plate 202, and seven mounting grooves 203 are distributed on each side. The guide holes 204 are vertically symmetrically opened on the left and right sides of the support plate 201 and the lower pressing plate 202. The clamping blocks 205 are symmetrically distributed at the four corners of the support plate 201 and the lower pressing plate 202.

[0031] Through the provided clamping blocks 205, the support plate 201 and the lower pressing plate 202 can be embedded and installed inside the device body 1. At the same time, with the cooperation of the guide holes 204 and the guide posts 4, the support plate 201 and the lower pressing plate 202 can slide up and down inside the device body 1, making it more convenient to adjust the mutual distance between the support plate 201 and the lower pressing plate 202 when needed, so as to adapt to more different die-casting modules 3. Moreover, through the provided mounting grooves 203, the installation work of the support plate 201 and the lower pressing plate 202 will also be faster. Secondly, the design of the central hole 206 mainly enables the connecting column 105 to pass through the interior and be spliced with the jack 9 below, facilitating the subsequent ejection work.

[0032] As Figure 4 、 Figure 8 and Figure 9 shown, in this embodiment, the die-casting module 3 includes a forming die 301, a lower pressing die 302, a bottom plate 303, a forming cavity 304, an injection block 305, a positioning hole 306, a positioning post 307, and a liquid inlet hole 308. A lower pressing die 302 is provided above the forming die 301. A bottom plate 303 is provided at the lower end of the forming die 301. The bottom plates 303 are symmetrically distributed at the lower end of the forming die 301 and the upper end of the lower pressing die 302. A forming cavity 304 is opened inside the upper end of the forming die 301. An injection block 305 is provided at the lower end of the lower pressing die 302. Positioning holes 306 are opened at the four corners of the upper end of the forming die 301. Positioning posts 307 are provided at the four corners of the lower end of the lower pressing die 302. A liquid inlet hole 308 is opened in the middle of the rear end of the lower pressing die 302.

[0033] The overall size and shape of the molding die 301 and the pressing die 302 are similar, and they are symmetrically distributed up and down. The molding die 301 and the lower bottom plate 303 are separable structures, while the pressing die 302 and the upper bottom plate 303 are integrated structures. The upward-facing surface of the molding die 301 is a concave structure, while the downward-facing surface of the pressing die 302 is a convex structure. The convex structure and the concave structure are mutually adapted. A molding cavity 304 is provided inside the concave structure, and an injection block 305 is provided at the lower end of the convex structure. The middle part of the injection block 305 is a hollow structure, and the hollow structure communicates with the cavity inside the pressing die 302. Moreover, a plurality of pressure flap pieces are provided at the lower opening of the hollow structure, which can ensure that a sealed structure is formed in the cavity inside the pressing die 302 in case of pressure loss, and ensure that the liquid inside does not leak. The diameter of the lower end inside the molding cavity 304 is mutually adapted to the upper end diameter of the ejector plug 103, and the positioning hole 306 and the positioning post 307 are mutually adapted.

[0034] Through the action of the provided positioning hole 306 and positioning post 307, when the molding die 301 and the pressing die 302 are installed, angle positioning is performed to ensure that there is no angular deviation between the two, which may affect the subsequent die-casting work. At the same time, when screw die-casting is carried out, through the docking and sealing of the liquid inlet hole 308 and the feeding module 6, the casting liquid is injected into the cavity inside the pressing die 302. Then, under the action of pressure, the molten metal is quickly filled into the molding cavity 304 along the hollow structure inside the injection block 305. After that, through the continuous pressure holding of the feeding module 6, the liquid in the molding cavity 304 can quickly solidify and form.

[0035] As Figure 1 and Figure 6 shown, in this embodiment, the feeding module 6 includes a mounting plate 601, a heat preservation box 602, a liquid storage tank 603, a piston pressure tube 604, a telescopic feeding tube 605, an electric heating tube 606, and a feeding control box 607. The rear end of the mounting plate 601 is provided with a heat preservation box 602. The middle part of the rear end of the heat preservation box 602 is provided with a liquid storage tank 603. The rear side of the upper end of the liquid storage tank 603 is provided with a piston pressure tube 604. The middle part of the front end of the mounting plate 601 is provided with a telescopic feeding tube 605. The upper end of the heat preservation box 602 is provided with an electric heating tube 606. The right side of the rear end of the heat preservation box 602 is provided with a feeding control box 607.

[0036] The mounting plate 601 and the heat preservation box 602 are integrated with each other. The heat preservation box 602, the liquid storage tank 603, the piston pressure tube 604, and the telescopic feeding tube 605 are all communicated with each other. Among them, the front end of the liquid storage tank 603 extends into the interior of the heat preservation box 602. The part of the electric heating tube 606 extending into the inner side of the heat preservation box 602 is distributed in a surrounding manner outside the liquid storage tank 603 extending into the interior of the heat preservation box 602. The electric heating tube 606 and the feeding control box 607 are electrically connected to each other.

[0037] Through the provided piston pressure pipe 604, pressure can be provided to enable the molten metal stored inside the liquid storage tank 603 to quickly enter the telescopic feeding pipe 605 through the heat preservation box 602 at a certain pressure and speed, and then be injected into the die-casting module 3 by the telescopic feeding pipe 605. The design of the electric heating pipe 606 is to ensure that the liquid inside the liquid storage tank 603 at one end entering the heat preservation box 602 always maintains a temperature, facilitating subsequent liquid injection work.

[0038] Such as Figure 1 , Figure 2 and Figure 7 shown, in this embodiment, the clamping and sealing module 7 includes an outer fixing plate 701, an electric push rod 702, an inner fixing plate 703, a spring abutting rod 704, a clamping plate 705, a pre-pressing plate 706, and an extrusion spring 707. In the middle of the rear end of the outer fixing plate 701, there is an electric push rod 702. Inside the front end of the outer fixing plate 701, there is an inner fixing plate 703. In the middle of the inner side of the inner fixing plate 703, there is a spring abutting rod 704. At the front end of the spring abutting rod 704, there is a clamping plate 705. Inside the front end of the clamping plate 705, there is a pre-pressing plate 706. On the upper and lower sides of the outer end of the pre-pressing plate 706, there are extrusion springs 707.

[0039] There are two groups of clamping and sealing modules 7 distributed symmetrically left and right. The installation directions of the outer fixing plate 701 and the inner fixing plate 703 are exactly opposite, and they are reinforced by bolts between them. The front end of the electric push rod 702 is spliced with the rear end of the spring abutting rod 704. The pre-pressing plates 706 are symmetrically distributed on the left and right sides inside the front end of the clamping plate 705. The pre-pressing plate 706 is composed of two upper and lower trapezoidal plates, and extrusion springs 707 are symmetrically installed at the upper and lower ends of the two trapezoidal plates. The extrusion springs 707 are distributed in a horizontal array.

[0040] Through the provided electric push rod 702, the two spring abutting rods 704 can be pushed forward from the left and right sides, driving the symmetrically distributed clamping plates 705 to be spliced with each other. During the splicing process, the pre-pressing plate 706 located inside the clamping plate 705 will first contact and expand with the contact ends of the forming die 301 and the lower pressing die 302. When the docking is completed, under the action of the extrusion spring 707, the pre-pressing plate 706 pre-presses and clamps the die contact ends from the upper and lower ends, enabling better fitting of all parts of the die, reducing gaps, and avoiding leakage of molten metal during die-casting. At the same time, the spliced clamping plates 705 will form a relatively sealed protective structure outside the die-casting module 3. If molten metal leaks, it will not directly burst out, reducing the probability of danger and improving production safety.

[0041] Such as Figure 4As shown in the figure, in this embodiment, the buffer module 10 includes an ejector plate 101, a sleeve 102, an ejector plug 103, a buffer spring 104 and a connecting column 105. A sleeve 102 is provided at the upper end of the ejector plate 101. An ejector plug 103 is provided inside the sleeve 102. A buffer spring 104 is provided on the outer side of the lower end of the ejector plug 103. A connecting column 105 is provided in the middle of the lower end of the ejector plate 101.

[0042] The ejector plate 101 and the sleeve 102 are of an integral structure. The sleeves 102 are distributed in a crosswise and aligned manner at the upper end of the ejector plate 101. The lower end of the ejector plug 103 extends to the inside of the sleeve 102 for positioning. At the same time, a buffer spring 104 is sleeved and installed on the outer side of the lower end of the ejector plug 103. The upper end of the ejector plug 103 extends to the inside of the forming cavity 304 opened at the lower end of the forming die 301. The two are mutually adapted and block the lower opening of the forming cavity 304.

[0043] By providing the buffer module 10, when the die-cast screw needs to be taken out after solidification, the power is increased by the lifter 9, driving the connecting column 105 to move upward to push the ejector plate 101 upward. When the ejector plate 101 is pushed upward, the buffer spring 104 located inside the sleeve 102 will be compressed. Due to its own characteristics, when the buffer spring 104 is compressed, it will release the compression force upward, driving the top of the ejector plug 103 to apply an upward force to the bottom of the die-cast screw formed inside the forming cavity 304, thereby ejecting the formed screw. During the entire ejection process, the ejection force is buffered once by the buffer spring 104, avoiding directly applying a large force during the ejection of the formed screw, which may cause deformation and cracking of the formed screw, and improving the production quality of the formed screw.

[0044] The electrical components appearing in this article are all connected to the external main controller and the mains electricity, and the main controller can be a conventional known device such as a computer for control.

[0045] A method for using a screw die-casting device with anti-damage and pre-pressurization includes the following steps; Step 1, mold installation. Through the installation grooves 203 opened at the upper end of the support plate 201 and the lower end of the lower pressing plate 202, the lower pressing die 302 and the bottom plate 303 in the die-casting module 3 are fixedly installed together with the support plate 201 and the lower pressing plate 202. Then, the forming die 301 is reinforced with the bottom plate 303. Among them, the forming die 301, the lower pressing die 302 and the bottom plate 303 are vertically installed at an angle. Step 2: Ejector connection. Through the provided connecting column 105, the upper end of the connecting column 105 is passed through the central hole 206 opened in the middle of the support plate 201 and the hole opened in the middle of the bottom plate 303, so that the upper end of the connecting column 105 fits against the lower end of the ejector plate 101. Then, the contact ends of the two are bolted for reinforcement. After that, the jack 9 is activated to extend its upper end. When it contacts the lower end of the connecting column 105, it is reinforced to form an integral structure; Step 3: Mold closing. The external hydraulic equipment connected to the hydraulic column 5 is controlled by the console 8 to operate, causing the hydraulic column 5 to press down, driving the lower pressing plate 202 to move downward, and driving the lower pressing mold 302 to close with the forming mold 301; Step 4: Sealing and clamping. The electric push rods 702 provided on the left and right sides of the outer end of the device body 1 start to operate, pushing the left and right spring rods 704 forward, driving the symmetrically distributed clamping plates 705 to be spliced together. During the splicing process, the pre-pressing plates 706 located inside the clamping plates 705 will first contact and expand the contact ends of the forming mold 301 and the lower pressing mold 302. Then, under the action of the compression springs 707, the pre-pressing plates 706 squeeze and clamp the contact ends of the molds from the upper and lower ends, forming a relatively sealed protective structure outside the die-casting module 3; Step 5: Mold preheating. By injecting heat medium into the liquid storage tank 603, then under the action of the piston pressure pipe 604, the heat medium inside the liquid storage tank 603 is squeezed, causing it to enter the heat preservation box 602. At the same time of squeezing, the pressure will also drive the telescopic feeding pipe 605 to extend forward. When the front end of the telescopic feeding pipe 605 is docked with the liquid inlet hole 308 at the rear end of the lower pressing mold 302, due to the tapered head provided inside the liquid inlet hole 308, it will squeeze the internally opened petal-shaped nozzle opened on the inner side of the front end of the telescopic feeding pipe 605. At this time, the telescopic feeding pipe 605 will be connected to the internal cavity of the lower pressing mold 302, allowing the heat medium to enter the cavity. Subsequently, when pressure is provided, the heat medium will also flow into the forming cavity 304 along the injection block 305, thereby starting the preheating work on the die-casting module 3; Step 6: Mold opening and spraying release agent. After the preheating work is completed, by operating the piston pressure pipe 604 in the reverse direction, the heat medium in the die-casting module 3 is pumped out. After the heat medium is discharged through the drain port at the lower end of the liquid storage tank 603, the clamping and sealing module 7 is separated. The forming mold 301 and the lower pressing mold 302 are separated by the reverse operation of the hydraulic column 5. Then, the inner cavity of the lower pressing mold 302 and the forming cavity 304 of the forming mold 301 are dried. After drying, a release agent is sprayed into the forming cavity 304, and then steps 3 and 4 are repeated; Step 7, screw die-casting. After draining the heat medium, blow dry the inside of the liquid storage tank 603. After it is dry inside, inject the casting liquid. Then, apply pressure through the injection piston in the piston pressure pipe 604 to press the casting liquid into the molding die 301, so that the casting liquid quickly fills the inside of the molding cavity 304. After the casting liquid fills the molding cavity 304, the injection piston continues to maintain a certain pressure, so that the casting liquid crystallizes and solidifies under the action of the pressure. Step 8, open the mold and take out the casting. When the screw is solidified and formed in the molding cavity 304, separate the die-casting module 3. After the molding die 301 and the lower molding die 302 are separated, the pressure acting on the upper end of the ejector plug 103 will disappear. Then, under the action of the lifter 9 and the connecting column 105, push the ejector plate 101 to move upward, exert pressure on the buffer spring 104. Under the action of the pressure below, the buffer spring 104 drives the ejector plug 103 to move upward, ejecting the formed screw from the molding cavity 304, so as to take out the casting.

[0046] The working principle technical solution provided by the present invention is as follows: Through the provided mounting table 2, since mounting grooves 203 are provided on the opposite surfaces of its upper and lower ends, only the necessary power needs to be provided by the hydraulic column 5 to adjust the distance between the upper and lower mounting tables 2 to an appropriate height, and then the die-casting module 3 is pushed into the inside of the device body 1 along the mounting grooves 203. After the mounting position of the die-casting module 3 is fixed in the central area, tighten and reinforce it with bolts. Subsequently, the electric push rods 702 provided on the left and right sides of the outer end of the device body 1 start to work, pushing the left and right spring rods 704 forward to drive the symmetrically distributed clamping plates 705 to be spliced together. During the splicing process, the pre-pressing plates 706 located inside the clamping plates 705 will first contact and expand with the contact ends of the molding die 301 and the lower molding die 302. Then, under the action of the compression springs 707, the pre-pressing plates 706 squeeze and clamp the contact ends of the molds from the upper and lower ends, forming a relatively sealed protective structure outside the die-casting module 3. Then, operate the feeding module 6 through the console 8 to start working. After its front liquid injection structure is hermetically docked with the liquid inlet hole 308 opened at the rear end of the upper structure of the die-casting module 3 to provide the casting liquid and pressure, quickly press the casting liquid into the cavity inside the die-casting module 3. Then, the feeding module 6 continues to maintain pressure until the metal liquid solidifies and forms. After the bolt is formed, operate the above-mentioned clamping and sealing module 7 in reverse to open the protective structure and separate the die-casting module 3. The lifter 9 provides power to push the buffer module 10 to provide an upward force to the solidified formed screw inside the lower structure of the die-casting module 3, thus completing the ejection work of the formed screw.

[0047] The present invention encompasses any alternatives, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention. For the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. Additionally, well-known methods, processes, procedures, components, and circuits, etc. are not described in detail to avoid unnecessary confusion to the essence of the present invention.

[0048] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

[0049] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-loss pre-pressible screw die-casting device, characterized in that, It includes a device body (1). Inside the middle of the device body (1), there is an installation platform (2). At the upper end of the installation platform (2), there is a die-casting module (3). At the four corners of the upper end of the installation platform (2), there are guide posts (4). At the upper end of the installation platform (2), there is a hydraulic column (5). In the middle of the rear end of the device body (1), there is a feeding module (6). On the left and right sides of the outer end of the device body (1), there are clamping and sealing modules (7). Below the front end of the device body (1), there is a control console (8). At the lower end inside the device body (1), there is a jack (9). At the lower end inside the die-casting module (3), there is a buffer module (10).

2. The anti-loss pre-pressible screw die-casting device according to claim 1, characterized in that, The installation platform (2) includes a support plate (201), a lower pressing plate (202), an installation groove (203), a guide hole (204), a clamping block (205), and a central hole (206). Above the support plate (201), there is a lower pressing plate (202). In the middle of the upper end of the support plate (201), there is a longitudinally opened installation groove (203). On the left and right sides of the installation groove (203), there are guide holes (204). At the four corners of the outer end of the support plate (201), there are clamping blocks (205). In the middle of the upper end of the support plate (201), there is a central hole (206).

3. The anti-loss pre-pressible screw die-casting device according to claim 1, characterized in that, The die-casting module (3) includes a forming die (301), a lower pressing die (302), a bottom plate (303), a forming cavity (304), an injection block (305), a positioning hole (306), a positioning post (307), and a liquid inlet hole (308). Above the forming die (301), there is a lower pressing die (302). At the lower end of the forming die (301), there is a bottom plate (303). Inside the upper end of the forming die (301), there is a formed forming cavity (304). At the lower end of the lower pressing die (302), there is an injection block (305). At the four corners of the upper end of the forming die (301), there are positioning holes (306). At the four corners of the lower end of the lower pressing die (302), there are positioning posts (307). In the middle of the rear end of the lower pressing die (302), there is a liquid inlet hole (308).

4. The anti-loss pre-pressible screw die-casting device according to claim 1, characterized in that, The feeding module (6) includes an installation plate (601), a heat preservation box (602), a liquid storage tank (603), a piston pressure pipe (604), a telescopic feeding pipe (605), an electric heating pipe (606), and a feeding control box (607). At the rear end of the installation plate (601), there is a heat preservation box (602). In the middle of the rear end of the heat preservation box (602), there is a liquid storage tank (603). At the rear side of the upper end of the liquid storage tank (603), there is a piston pressure pipe (604). In the middle of the front end of the installation plate (601), there is a telescopic feeding pipe (605). At the upper end of the heat preservation box (602), there is an electric heating pipe (606). At the right side of the rear end of the heat preservation box (602), there is a feeding control box (607).

5. The anti-loss pre-pressible screw die-casting device according to claim 1, characterized in that, The clamping and sealing module (7) includes an outer fixing plate (701), an electric push rod (702), an inner fixing plate (703), a spring abutting rod (704), a clamping plate (705), a pre-pressing plate (706) and a compression spring (707). In the middle of the rear end of the outer fixing plate (701), there is an electric push rod (702). Inside the front end of the outer fixing plate (701), there is an inner fixing plate (703). In the middle of the inner side of the inner fixing plate (703), there is a spring abutting rod (704). At the front end of the spring abutting rod (704), there is a clamping plate (705). Inside the front end of the clamping plate (705), there is a pre-pressing plate (706). On the upper and lower sides of the outer end of the pre-pressing plate (706), there are compression springs (707).

6. The anti-loss pre-pressible screw die-casting device according to claim 1, characterized in that, The buffer module (10) includes an ejecting plate (101), a sleeve (102), an ejecting plug (103), a buffer spring (104) and a connecting column (105). On the upper end of the ejecting plate (101), there is a sleeve (102). Inside the sleeve (102), there is an ejecting plug (103). On the outer side of the lower end of the ejecting plug (103), there is a buffer spring (104). In the middle of the lower end of the ejecting plate (101), there is a connecting column (105).

7. The anti-loss pre-pressible screw die-casting device according to claim 1, characterized in that, The mounting table (2) is composed of two upper and lower parts, and the overall sizes and shapes of the two upper and lower parts are the same. The upper and lower ends of the die-casting module (3) are respectively reinforced with the two upper and lower parts of the mounting table (2). The hydraulic columns (5) are composed of four external ones and one central one to form a complete hydraulic system, and are respectively fixedly installed at the top of the upper part of the mounting table (2). There are two groups of the sealing modules (7) symmetrically distributed on the left and right. The upper end of the lifter (9) is connected to the lower end of the buffer module (10).

8. The anti-loss pre-pressible screw die-casting device according to claim 4, characterized in that, The heat preservation box (602), the liquid storage tank (603), the piston pressure pipe (604) and the telescopic feeding pipe (605) are all interconnected. The front end of the liquid storage tank (603) extends into the interior of the heat preservation box (602). The part of the electric heating pipe (606) extending into the inner side of the heat preservation box (602) is distributed in a surrounding manner on the outer side of the liquid storage tank (603) extending into the interior of the heat preservation box (602).

9. The anti-loss pre-pressible screw die-casting device according to claim 5, characterized in that, The installation directions of the outer fixing plate (701) and the inner fixing plate (703) are exactly opposite, and the two are reinforced by bolts. The front end of the electric push rod (702) is spliced with the rear end of the spring abutting rod (704). The pre-pressing plates (706) are symmetrically distributed on the left and right sides inside the front end of the clamping plate (705). The pre-pressing plate (706) is composed of two upper and lower trapezoidal plates, and compression springs (707) are symmetrically installed at the upper and lower ends of the two trapezoidal plates. The compression springs (707) are distributed in a horizontal array.

10. The usage method of the anti-loss pre-pressible screw die-casting device according to claims 1-9, characterized in that, Include the following steps: Step 1: Mold installation. Through the installation grooves (203) opened at the upper end of the support plate (201) and the lower end of the lower pressing plate (202), the lower pressing mold (302) and the bottom plate (303) in the die-casting module (3) are fixedly installed together with the support plate (201) and the lower pressing plate (202). Then, the forming mold (301) is reinforced with the bottom plate (303). Among them, the forming mold (301), the lower pressing mold (302), and the bottom plate (303) are installed at a vertical angle to each other. Step 2: Ejection connection. Through the set connection column (105), the upper end of the connection column (105) passes through the central hole (206) opened in the middle of the support plate (201) and the hole opened in the middle of the bottom plate (303), so that the upper end of the connection column (105) fits against the lower end of the ejection plate (101). Then, the contact ends of the two are bolted and reinforced. After that, the lifter (9) is turned on to extend its upper end. When it contacts the lower end of the connection column (105), it is reinforced to form an integral structure. Step 3: Mold closing. The external hydraulic equipment connected to the hydraulic column (5) is controlled by the console (8) to work, so that the hydraulic column (5) presses downward to drive the lower pressing plate (202) to move downward, driving the lower pressing mold (302) to close with the forming mold (301). Step 4: Sealing and clamping. The electric push rods (702) arranged on the left and right sides of the outer end of the device body (1) start to work, pushing the left and right spring rods (704) forward to drive the symmetrically distributed clamping plates (705) to be spliced together. During the splicing process, the pre-pressing plates (706) located inside the clamping plates (705) will first contact and expand the contact ends of the forming mold (301) and the lower pressing mold (302). Then, under the action of the compression spring (707), the pre-pressing plates (706) squeeze and clamp the contact ends of the molds from the upper and lower ends, forming a relatively sealed protection structure outside the die-casting module (3). Step 5: Mold preheating. Heat medium is injected into the liquid storage tank (603). Then, under the action of the piston pressure pipe (604), the heat medium in the liquid storage tank (603) is squeezed, and it enters the heat preservation box (602). At the same time of squeezing, the pressure will also drive the telescopic feeding pipe (605) to extend forward. When the front end of the telescopic feeding pipe (605) is docked with the liquid inlet hole (308) at the rear end of the lower pressing mold (302), due to the tapered head inside the liquid inlet hole (308), the inner-opening petal-shaped nozzle opened on the inner side of the front end of the telescopic feeding pipe (605) will be squeezed. At this time, the telescopic feeding pipe (605) will be connected to the internal cavity of the lower pressing mold (302), so that the heat medium enters the cavity. Subsequently, when pressure is provided, the heat medium will also flow into the forming cavity (304) along the injection block (305), thus starting the preheating work of the die-casting module (3). Step Six: Open the mold and spray the release agent. After the preheating work is completed, reverse the operation of the piston pressure pipe (604) to extract the heat medium from the die-casting module (3). After that, discharge the heat medium through the drain port at the lower end of the liquid storage tank (603), then separate the clamping and sealing module (7). Reverse the operation of the hydraulic column (5) to separate the forming die (301) from the lower pressing die (302). Then, dry the inner cavity of the lower pressing die (302) and the forming cavity (304) of the forming die (301). After drying, spray the release agent into the forming cavity (304), and then repeat Step Three and Step Four; Step Seven: Screw die-casting. After draining the heat medium completely, dry the inside of the liquid storage tank (603). After it is dry inside, inject the casting liquid. Then, apply pressure through the injection piston in the piston pressure pipe (604) to press the casting liquid into the forming die (301) so that the casting liquid quickly fills the inside of the forming cavity (304). After the casting liquid fills the forming cavity (304), the injection piston continues to maintain a certain pressure to make the casting liquid crystallize and solidify under the action of the pressure; Step Eight: Open the mold and take out the casting. When the screw is solidified and formed in the forming cavity (304), separate the die-casting module (3). After the forming die (301) and the lower pressing die (302) are separated, the pressure acting on the upper end of the ejector plug (103) will disappear. Then, under the action of the lifter (9) and the connecting column (105), the ejector plate (101) is pushed to move upward, pressing the buffer spring (104). Under the action of the lower pressure, the buffer spring (104) drives the ejector plug (103) to move upward to eject the formed screw from the forming cavity (304), thus taking out the casting.

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