Screen forming equipment for TPU welding

Abstract

The utility model provides screen forming equipment for TPU (thermoplastic polyurethane) welding. The screen forming equipment comprises a screen plate sub-part transferring assembly arranged on a welding platform and a screen plate sub-part for pressing the side edge of the butt joint edge of the screen plate sub-part, the hot air welding mechanism is positioned above the to-be-welded areas of the two separated parts and is used for performing hot air blowing treatment on a butt edge gap; and the fusion area pressing and forming assembly is used for pressing and forming the fusion area of the butt joint edges of the two screen plate sub-parts. According to the invention, the large-scale or even ultra-large-scale integral injection-molded part is formed through a welding process mode of firstly carrying out injection molding on the small components and then carrying out butt joint one by one to carry out hot fusion cooling, so that the technical problem that large-scale or ultra-large-scale injection-molded parts are difficult to produce or even cannot be produced in the prior art is solved; therefore, injection molding parts with large boundary dimensions and ultra-large boundary dimensions can be manufactured with a simple process method and cost, and curved edges or annular butt joint or hybrid welding of injection molding modules with different colors can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of macromolecular composite thermoplastic material processing, in particular to a TPU welded screen forming device. Background Art

[0002] Usually, macromolecular composite thermoplastic materials are used for thermoplastic molding to make various molded parts, which are widely used in industries such as shoemaking, toys, automobiles, sports, medical treatment, and mineral processing. With the development of technology, especially the wider application of TPU polyurethane, TPU has advantages that other polymer plastic materials cannot match. It is widely used in industrial production industries for its good wear resistance, low temperature resistance, aging resistance, mildew resistance, high-strength impact resistance and tear resistance, high elongation and tensile strength and other high-quality characteristics. There are many methods for TPU molding process: including injection molding, blow molding, compression molding, extrusion molding, etc., among which injection molding is the most commonly used. The function of injection molding is to process TPU into the required parts, which is divided into a discontinuous process of pre-molding, injection and machine output. After the product is formed, if it needs to be injected again, the original part must be placed in a standard mold and injected again.

[0003] The shortcomings of all current injection molding processes are also obvious. The production of large-scale parts is restricted by mold production and the amount of melt that can be shot out of the injection molding machine at one time. It is also particularly restricted by the size, complexity and cost of the injection molding machine and the mold. If large parts need to be produced, more oversized injection molding machines and oversized injection molds are required, which will lead to the need for larger factories. The cost of injection molding machines and molds will also double exponentially, and the preparation and production cycle and difficulty of the corresponding injection molding machines and molds will increase significantly or even become difficult to achieve. Utility Model Content

[0004] The utility model aims at the technical problems existing in the prior art and provides a TPU welded screen forming device to solve the problem that the production process of large parts by injection molding is complicated and the production cost is high.

[0005] The utility model proposes a TPU welded screen forming device, comprising a welding platform, a screen plate component transfer assembly, a screen plate component pressing assembly, a hot air welding mechanism and a molten area pressure forming assembly;

[0006] The mesh plate component transfer assembly is arranged on the welding platform, and is used to drive the mesh plate components to be welded to move in sequence along the hot air welding mechanism and the melting area pressure forming assembly;

[0007] The mesh plate segment pressing assembly is used to press the side edges of the mesh plate segment butt joints; the hot air welding mechanism is located above the area to be welded between the two segments and is used to perform hot air blowing treatment on the gap between the butt joints;

[0008] The molten area pressure forming component is used to press and shape the molten areas of the butt edges of two mesh plate components.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows:

[0010] Furthermore, the mesh plate component transfer assembly includes an annular rail and a plurality of feed plates evenly surrounding the annular rail; the annular rail is provided with a slider connected to each feed plate, and a slider driving assembly for driving the slider to slide cyclically along the annular rail.

[0011] Further, the slider driving assembly includes:

[0012] two sprockets placed in the circular track;

[0013] A chain disposed on the two sprockets and connected to the slider;

[0014] A motor drive connected to a sprocket drive.

[0015] Furthermore, the inner ring and the outer ring of the annular rail are respectively formed with an inner annular groove and an outer annular groove, and the slider is provided with two groups of pulleys which are respectively slidably matched with the inner annular groove and the outer annular groove.

[0016] Furthermore, the mesh plate segment pressing assembly includes a lifting frame and a lifting drive connected to the lifting frame; the lifting frame is provided with two sets of pressing plates arranged opposite to each other along the two sides of the butt joint of the mesh plate segment;

[0017] The hot air welding mechanism comprises a conical bellows mounted on a lifting frame and located between two pressure plates; an air outlet facing the melting area of ​​the mesh plate butt edge is opened at the bottom of the conical bellows, and a high-temperature hot air device is connected above it through a pipeline.

[0018] The screen forming equipment based on TPU welding provided by the utility model has at least the following beneficial effects compared with the prior art:

[0019] By first injection molding small parts, and then forming large (large size) or even extra-large (extra-large size) integral injection molded parts through a welding process of hot fusion cooling by butting them one by one, the technical problem that it is difficult or even impossible to produce large and extra-large injection molded parts with the existing technology is solved, thereby achieving a simple process method and cost to produce large and extra-large size injection molded parts, and can also achieve curved edge or ring butt joint, or composite welding of injection molding modules of different colors.

[0020] At the same time, the outstanding performance of the molded parts welded by the welding process method of the utility model, especially the impact resistance and tear resistance of strength, and the physical properties such as high elongation and tensile strength remain unchanged, and are consistent with the various performance indicators of the injection molded parts directly injected, ensuring that the mechanical strength of the integrally molded plastic parts after welding is close to or even equal to the mechanical strength of the one-time injection molded parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the process flow of the utility model when it is working;

[0022] Figure 2 It is a schematic diagram of the TPU welding process when the utility model is working;

[0023] Figure 3 It is a schematic diagram of the welding process flow of straight edge butt welding when the utility model is working;

[0024] Figure 4 It is a schematic diagram of the welding process flow of curved edge butt welding when the utility model is working;

[0025] Figure 5 It is a schematic diagram of the welding process flow of the same module pair when the utility model is working;

[0026] Figure 6 It is a schematic diagram of the welding process flow of different parts when the utility model is working;

[0027] Figure 7 It is a schematic diagram of the welding process flow of the curved edge module pair when the utility model is working;

[0028] Figure 8 It is a schematic diagram of the overall structure of the screen forming equipment of the utility model;

[0029] Fig. 9 For this utility model Figure 8 The enlarged view of point A in the middle;

[0030] Fig.10 This is a schematic diagram of the overall structure of the screen forming device of the utility model from another perspective;

[0031] Fig.11 It is a partial structural schematic diagram of the mesh plate component transfer assembly of the utility model;

[0032] Fig.12 For this utility model Fig.11 The enlarged view of point B in the middle;

[0033] Fig.13 For this utility model Fig.11 Enlarged view of point C in the middle.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] 1. Welding platform, 2. Mesh plate component transfer assembly, 2.1. Ring rail, 2.2. Feed plate, 2.3. Slider, 2.4. Sprocket, 2.5. Pulley, 2.6. Motor drive, 3. Mesh plate component clamping assembly, 3.1. Lifting frame, 3.2. Lifting drive, 3.3. Pressing plate, 4. Hot air welding mechanism, 4.1. Conical bellows, 4.2. High-temperature hot air equipment, 5. Melting area pressure molding assembly, 5.1. Pressure plate, 5.2. Bending edge. DETAILED DESCRIPTION

[0036] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0037] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For ordinary technicians in this field, the specific meanings of such terms in this patent can be understood according to specific circumstances.

[0038] When making large and super-large integral injection molded parts, the existing injection molding process has high requirements and it is difficult to ensure the process standards and norms. At the same time, although there are a few macromolecular composite thermoplastic materials such as medical infusion bags, automobile airbags and other disposable hot-pressed thin-walled products, which adopt similar laser welding, high-frequency welding, ultra-frequency welding and other processes for overlapping welding, this welding process can only achieve a very thin layer of fusion welding on the overlapping surface. The relevant mechanical strength after welding is poor, especially the tensile strength, impact resistance, elongation, tear resistance, etc. are significantly reduced in the welding part, and it is used in occasions with low requirements. In this regard, the utility model discloses a screen molding equipment based on TPU welding to solve the problem of poor mechanical strength and significant reduction in product performance of macromolecular composite thermoplastic materials after welding.

[0039] like Figure 1 and Figure 2 As shown, the TPU welding process of the utility model during operation, based on the components formed by macromolecular composite thermoplastic materials, includes the following steps:

[0040] Align and fit the butt edges of two adjacent parts, and press the butt edges of the parts tightly so that the gap between the butt edges is located in the center of the welding area;

[0041] Perform hot air blowing treatment on the gap between the two parts so that the two edges are melted together;

[0042] Pressure is applied to the molten area of ​​the butt edge of the two parts, and the parts are cooled and shaped to form a new molded part.

[0043] In order to further illustrate the application of the TPU welding process of the screen forming equipment based on TPU welding proposed by the utility model for welding and forming of macromolecular composite thermoplastic materials, the following preferred embodiments are also supplemented for detailed description:

[0044] Embodiment 1

[0045] like Figure 2 As shown, a plurality of small module parts 1A and 1B of the screen are formed by injection molding TPU (polyurethane) using a mold;

[0046] Take the screen module component 1A and the module component 1B and align their butt edges together and place them on the welding platform. Due to the straightness error between the butt edges of the screen module components, there is a gap of t value between the butt edges, and this gap is close to zero;

[0047] The pre-pressing plate 1Y is used to press the side edge S=2-20mm width area of ​​the butt joint, and the area is hot-blown to a temperature of 200-350℃ until it is in a molten state. The butt joint is melted together, and the welding platform moves forward to the next station;

[0048] At the butt joint, the molten area is subjected to a certain pressure by the pressing plate 1P and cooled at the same time. The molten area is subjected to a certain pressure and cooled to be shaped, and the original physical properties of the TPU plastic part are restored after cooling, thereby welding to form a new TPU screen molded part 1Z of a larger size;

[0049] At the same time, due to factors such as the gap between the butt edges, the thickness t1 of the area after welding will be slightly smaller than the thickness t before welding. However, the outstanding performance of the molded parts welded by the welding process method of the screen molding equipment based on TPU welding of the utility model, especially the impact resistance and tear resistance of the strength, and the high elongation and tensile strength remain unchanged, which is consistent with the various performance indicators of the one-piece TPU screen directly injected.

[0050] When the TPU screen molded part 1Z needs to be further extended, small module parts can be put in, and the above-mentioned welding process of pre-pressing plate 1Y pressing - hot air melting - displacement - pressurization - cooling is repeated. The molten area is pressurized and cooled to form a certain shape, and the original physical properties of the injection molded part are restored after cooling, thereby welding to form a TPU screen assembly.

[0051] Continue to place subsequent parts and perform the above welding process until the screen TPU large part 1Z that meets the required design requirements is achieved.

[0052] At the same time, due to factors such as the gap between the butt edges, the thickness t1 of the area after welding will be slightly smaller than the thickness t before welding. However, the outstanding performance of the molded parts welded by the welding process method of the screen molding equipment based on TPU welding of the utility model, especially the impact resistance and tear resistance of the strength, and the high elongation and tensile strength remain unchanged, which is consistent with the various performance indicators of the one-piece TPU screen directly injected.

[0053] Based on the above TPU welding process, in order to further apply the macromolecular composite thermoplastic material TPU polyurethane screen molding, this application also proposes a screen molding process based on TPU welding, such as Figure 1-Figure 4 As shown, the specific steps are as follows:

[0054] A plurality of parts of the screen are formed by injection molding TPU, and two adjacent parts are welded by TPU welding process to form a screen forming part;

[0055] The screen forming part is transferred to the next station and welded with the next sub-part to form a large-sized screen forming part;

[0056] The remaining parts are welded with the front large-size screen forming parts in sequence to form a screen assembly.

[0057] Based on the above screen forming process, the following preferred embodiments are supplemented for detailed description:

[0058] Embodiment 2

[0059] In this embodiment, a mold is used to injection mold TPU (polyurethane) to form several small screen module parts 101 (ie, sub-parts).

[0060] It is particularly noted that the butting edges of the small screen module pieces 101 are straight edges, and the lengths of the small screen module pieces 101 are the same.

[0061] like Figure 5 As shown, two small screen module pieces 101 are aligned and placed together on a welding platform. Due to the straightness error of the butt joint pieces of the screen module, there is a gap of j value on the butt joint edge, and this gap is close to zero.

[0062] The pre-pressing plate 1Y is used to press the side edge S=2-20mm width area of ​​the butt joint, and the area is hot-blown to a temperature of 200-350°C until it is in a molten state. The butt joint is melted together, and the welding platform moves forward to the next station.

[0063] At the joint, a certain pressure is applied to the molten zone through the pressure plate 1P, and it is cooled at the same time. The molten area is shaped by a certain pressure and cooling, thereby welding to form a screen forming part 102 (i.e., a large-sized screen forming part) whose length W1 is approximately twice the length W of the small part 101.

[0064] Continue to put in the module small piece 101, align the side of this small piece 101 with the side of the small piece 102 and fit them together, and continue to repeat the above-mentioned welding process of pre-pressing plate 1Y pressing - hot air melting - shifting - pressurizing - cooling. The molten area is pressurized and cooled to shape, thereby welding to form a component 103 (i.e., a screen component) that is three times the length W2 of the plastic TPU small piece 101.

[0065] Continue to repeatedly place the module small piece 101 and perform the above welding process until the TPU screen large piece 1 with the required design length Wz (that is, the final required screen size) is reached.

[0066] At the same time, due to factors such as the gap between the butt edges, the thickness t1 of the area after welding will be slightly smaller than the thickness t before welding. However, the outstanding performance of the molded parts welded by the welding process method of the screen molding equipment based on TPU welding of the utility model, especially the impact resistance and tear resistance of the strength, and the high elongation and tensile strength remain unchanged, which is consistent with the various performance indicators of the one-piece TPU screen directly injected.

[0067] Embodiment 3

[0068] In this embodiment, mold injection molding of TPU (polyurethane) is used to form the small parts 201A, 201B, 201C, etc. of the screen module.

[0069] It is particularly noted that the butting edges of the small screen module pieces are straight lines, and the lengths of the small screen module pieces 101 are not completely consistent.

[0070] like Figure 6 As shown, the screen module components 201A and 201B are placed on the welding platform, and the side edges are aligned and fitted together at the joint according to the design requirements. Due to the straightness error of the screen module joint edge pieces, there is a gap of j at the joint edge, and this gap j is close to zero.

[0071] A pre-pressing plate 1Y is used to press the side edge S=2~20mm width area of ​​the butt joint, and the area is hot-blown to a temperature of 200~350℃ until it is in a molten state. The butt joint is melted together, and the welding platform moves forward to the next workstation. A certain pressure is applied to the molten area at the butt joint through the pressing plate 1P, and the area is cooled at the same time. The molten area is pressurized and cooled to be shaped, thereby welding to form component 202.

[0072] Then, the screen module component 201C is placed in, and the above-mentioned welding process of pre-pressing plate 1Y pressing - hot air melting - displacement - pressurization - cooling is repeated. The molten area is pressurized and cooled to be shaped, thereby welding to form a molding component 203.

[0073] Continue to place subsequent screen module components and execute the above welding process until the TPU molded large part 2 that meets the required design requirements is achieved.

[0074] At the same time, due to factors such as the gap between the butt edges, the thickness t1 of the area after welding will be slightly smaller than the thickness t before welding. However, the outstanding performance of the molded parts welded by the welding process method of the screen molding equipment based on TPU welding of the utility model, especially the impact resistance and tear resistance of the strength, and the high elongation and tensile strength remain unchanged, which is consistent with the various performance indicators of the one-piece TPU screen directly injected.

[0075] Embodiment 4

[0076] In this embodiment, mold injection molding of TPU (polyurethane) is used to form the screen module components 301A, 301B, 301C, ...

[0077] It is particularly noted that the butt joint edges of the small screen module pieces are curved edges, and the lengths of the small screen module pieces 101 are consistent.

[0078] like Figure 7 As shown, the swing module components 301A and 301B are placed on the welding platform, and the butt joint edges are aligned together according to the design requirements. Due to the error in the shape of the butt joint edges of the screen module components, there is a small gap of j value, and this gap j is close to zero.

[0079] The pre-pressing plate 1Y is used to press the side edge S=2-20mm width area of ​​the butt joint, and the area is hot-blown to a temperature of 200-350°C until it is in a molten state. The butt joint is melted together, and the welding platform moves forward to the next station.

[0080] At the joint, a certain pressure is applied to the molten area by the pressing plate 1P, and the area is cooled at the same time. The molten area is shaped by the pressure and cooling, and the assembly 302 is formed by welding.

[0081] Next, place the module into the sub-component 301C, align the sub-component 301C and the component 302 together as required by the design, and continue to repeat the above-mentioned process of pre-pressing plate 1Y pressing - hot air melting - shifting - pressurizing - cooling welding. The molten area is pressurized and cooled to be shaped, thereby welding to form component 303.

[0082] Continue to place subsequent module small pieces and perform the above welding process until the TPU molded large piece 3 that meets the required design requirements is achieved.

[0083] At the same time, due to factors such as the gap between the butt edges, the thickness t1 of the area after welding will be slightly smaller than the thickness t before welding. However, the outstanding performance of the molded parts welded by the welding process method of the screen molding equipment based on TPU welding of the utility model, especially the impact resistance and tear resistance of the strength, and the high elongation and tensile strength remain unchanged, which is consistent with the various performance indicators of the one-piece TPU screen directly injected.

[0084] The utility model discloses a screen forming device based on TPU welding, such as Figure 8 , Fig. 9 and Fig.10 As shown, the screen forming equipment includes a welding platform 1, a screen plate component transfer component 2, a screen plate component pressing component 3, a hot air welding mechanism 4 and a melting area pressure forming component 5;

[0085] The mesh plate component transfer assembly 2 is arranged on the welding platform 1, and is used to drive the mesh plate components to be welded to move in sequence along the hot air welding mechanism 4 and the melting area pressure forming assembly 5;

[0086] The mesh plate segment pressing assembly 3 is used to press the side edges of the mesh plate segment; the hot air welding mechanism 4 is located above the area to be welded between the two segments and is used to perform hot air blowing treatment on the gap between the butt edges;

[0087] The molten area pressure forming component 5 is used to press and shape the molten area of ​​the butt edges of the two mesh plate components.

[0088] In this embodiment, the mesh panel components to be welded are carried by the welding platform 1, and the mesh panel component transfer component 2 sequentially transfers two adjacent mesh panel components to the welding area, and the mesh panel component pressing component 3 presses the side area of ​​the mesh panel components within a width of 2 to 20 mm, and the hot air welding mechanism 4 performs hot blowing treatment on the gap between the butt edges, and the hot blowing is performed to a temperature of 200 to 350° C. until it is in a molten state; after welding, the mesh panel component transfer component 2 transfers the mesh panel components to the molten area pressure molding component 5, and the molten area is subjected to a certain pressure and cooled to be shaped; finally, the mesh panel components are continuously transported by the mesh panel component transfer component 2 to connect the subsequent mesh panel components until the screen of the required length is formed.

[0089] As an implementation method, Fig.11 and Fig.12As shown, the mesh plate component transfer assembly 2 includes a circular rail 2.1 and a plurality of feed plates 2.2 evenly surrounding the circular rail 2.1; the circular rail 2.1 is provided with a slider 2.3 connected to each feed plate 2.2, and a slider driving assembly for driving the slider 2.3 to slide along the circular rail 2.1 in a circular manner. The slider driving assembly drives the slider 2.3 to slide along the circular rail 2.1 in a circular manner, thereby driving the feed plates 2.2 to accurately feed the mesh plate components.

[0090] Specifically, the slider driving assembly includes:

[0091] Two sprockets 2.4 placed in the ring track 2.1;

[0092] A chain disposed on the two sprockets 2.4 and connected to the slider 2.3;

[0093] A motor drive 2.6 is drivingly connected to the sprocket 2.4.

[0094] The motor drive 2.6 drives the sprocket 2.4, which in turn drives the slider 2.3 to move in cooperation with the chain.

[0095] Specifically, the inner ring and outer ring of the annular rail 2.1 are respectively formed with an inner annular groove and an outer annular groove, and the slider 2.3 is equipped with two groups of pulleys 2.5 that slide with the inner annular groove and the outer annular groove respectively. The sliding accuracy of the slider 2.3 is ensured by the cooperation of the two groups of pulleys 2.5.

[0096] As an implementation method, Figure 11-13 As shown, the mesh plate segment pressing assembly 3 includes a lifting frame 3.1 and a lifting driving member 3.2 connected to the lifting frame 3.1; the lifting frame 3.1 is provided with two sets of pressing plates 3.3 arranged opposite to each other along the two sides of the butt joint of the mesh plate segment;

[0097] The hot air welding mechanism 4 comprises a conical air box 4.1 mounted on the lifting frame 3.1 and located between the two pressing plates 3.3; an air outlet facing the melting area of ​​the mesh plate joint edge is opened at the bottom of the conical air box 4.1, and the top is connected to the high-temperature hot air device 4.2 through a pipeline.

[0098] The lifting frame 3.1 is driven to move up and down by the lifting driving member 3.2, so as to drive the pressing plate 3.3 to press the mesh plate components and make the air outlet of the conical bellows 4.1 close to the welding area.

[0099] It should be noted that the lifting drive component 3.2 can be an existing lifting drive component, such as a lifting slide, an electric slide and other driving devices, and the high-temperature hot air device 4.2 can adopt a high-pressure hot air blower, which will not be elaborated here.

[0100] In this embodiment, the molten area pressure molding component 5 includes a pressure plate 5.1, which is placed horizontally and has a downward inclined bending edge 5.2 formed on one side. When the mesh plate components are transferred to the pressure molding area, pressure is applied to the pressure plate 5.1 so that the bending edge 5.2 presses the molten area, and the molten area is subjected to a certain pressure and cooled to be shaped.

[0101] The pressure plate 5.1 may be pressurized by a pressure device, such as a cylinder (not shown in the figure), or manually intervened to control the pressing force.

[0102] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0103] Although the preferred embodiments of the utility model have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the utility model.

[0104] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A TPU welded screen forming device, characterized in that: It comprises a welding platform (1), a mesh plate component transfer assembly (2), a mesh plate component pressing assembly (3), a hot air welding mechanism (4) and a molten area pressure forming assembly (5); The mesh plate component transfer assembly (2) is arranged on the welding platform (1) and is used to drive the mesh plate components to be welded to move in sequence along the hot air welding mechanism (4) and the melting area pressure forming assembly (5); The mesh plate segment pressing assembly (3) is used to press the side edges of the butt joint of the mesh plate segment; the hot air welding mechanism (4) is located above the area to be welded between the two segments and is used to perform hot air blowing treatment on the gap between the butt joints; The molten area pressure forming component (5) is used to press and shape the molten areas at the butt edges of two mesh plate components.

2. The screen forming equipment according to claim 1, characterized in that: The mesh plate component transfer assembly (2) comprises an annular rail (2.1) and a plurality of feeder plates (2.2) uniformly surrounding the annular rail (2.1); the annular rail (2.1) is provided with a slider (2.3) connected to each of the feeder plates (2.2), and a slider drive assembly for driving the slider (2.3) to slide cyclically along the annular rail (2.1).

3. The screen forming device according to claim 2, characterized in that: The slider drive assembly comprises: Two sprockets (2.4) placed in the annular track (2.1); A chain arranged on the two sprocket wheels (2.4) and connected to the slider (2.3); A motor drive member (2.6) is drivingly connected to the sprocket (2.4).

4. The screen forming equipment according to claim 2, characterized in that: The inner ring and outer ring of the annular rail (2.1) are respectively formed with an inner annular sliding groove and an outer annular sliding groove, and the slider (2.3) is provided with two groups of pulleys (2.5) respectively slidingly matched with the inner annular sliding groove and the outer annular sliding groove.

5. The screen forming equipment according to claim 1, characterized in that: The mesh plate segment pressing assembly (3) comprises a lifting frame (3.1) and a lifting drive member (3.2) connected to the lifting frame (3.1); the lifting frame (3.1) is provided with two groups of pressing plates (3.3) arranged opposite to each other along the two sides of the butt joint of the mesh plate segment; The hot air welding mechanism (4) comprises a conical bellows (4.1) mounted on a lifting frame (3.1) and located between two pressure plates (3.3); an air outlet facing the melting area of ​​the mesh plate butt joint edge is provided at the bottom of the conical bellows (4.1), and the top is connected to a high-temperature hot air device (4.2) via a pipeline.

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