Extrusion molding device for plastic pipe fitting production

Abstract

The utility model relates to the technical field of plastic pipe production, in particular to an extrusion molding device for plastic pipe fitting production, which comprises an extruder, a blanking tank is arranged at the top of the extruder, a scraper blade is rotatably connected in the blanking tank, an extrusion screw is rotatably connected in the extruder, and the scraper blade is rotatably connected in the extrusion screw. And a first gear and a second gear are respectively arranged at one end of the extrusion screw shaft head. According to the improved extrusion molding device, it is ensured that flowing materials can be accurately conveyed to the position for molding through the discharging pipe, the problem that the interior of the extrusion molding device is blocked after cooling is avoided, relative movement of a top transmission structure is achieved through the structure that bevel gears and bevel gears are meshed, synchronism of top transmission parts is ensured, and the service life of the extrusion molding device is prolonged. By means of the transmission mode, the two sets of molds used for forming achieve a complete mold structure through a relative transmission structure, the continuous injection molding process is achieved in the continuous transmission mode, and compared with independent molding, the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pipe production, in particular to an extrusion molding device for plastic pipe fittings production. Background Art

[0002] Plastic pipes generally refer to pipe fittings mainly made of synthetic resin, i.e., plastic, and processed and formed by processes such as extrusion, injection molding, and molding. They have the advantages of light texture, corrosion resistance, low cost, etc., and are widely used in many fields such as building water supply and drainage, agricultural irrigation, industrial fluid transportation, and wire and cable protection.

[0003] Extrusion molding equipment is a mechanical device used to heat, pressurize raw materials such as plastics and rubbers, and continuously produce products with a certain cross-sectional shape and size by rotating and pushing through a screw and passing through a die orifice with a specific shape.

[0004] In the process of implementing the present utility model, the inventor found that the prior art has the following problems: 1. At present, the extrusion and shaping of some plastic pipes are not completed integrally, but the initially extruded pipe blank is separately processed in the shaping process; 2. For some processes that use a transmission method to shape the pipeline, the die is usually directly installed on the transmission equipment. When the processing size changes, it needs to be disassembled and replaced. Frequent disassembly will cause loosening at the position where the die is connected to the transmission equipment, which may affect subsequent processing. Moreover, the position for discharging materials does not have the function of maintaining temperature, resulting in poor fluidity of the material and affecting the continuity of extrusion. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide an extrusion molding device for the production of plastic pipe fittings, so as to solve the problems raised in the above-mentioned background technology that the extrusion and shaping are not completed integrally during processing, which increases the working time, and the mold is directly installed on the transmission equipment, and frequent disassembly will cause looseness at the position where the mold is connected to the transmission equipment. To achieve the above purpose, the present utility model provides the following technical solutions: An extrusion molding device for the production of plastic pipe fittings, including an extruder, a feeding tank is opened at the top of the extruder, a scraper is rotatably connected inside the feeding tank, an extrusion screw is rotatably connected inside the extruder, one end of the shaft head of the extrusion screw is respectively provided with a first gear and a second gear, the first gear is rotatably connected to the inner wall of the extruder through a servo motor and meshed with the lower part of the second gear, one end of the shaft head of the extrusion screw penetrates through the center of the second gear and is integrally connected with it, a temperature controller is opened on one side of the outer wall of the extruder, a discharge head is bolted to the other side of the outer wall of the extruder, a discharge pipe is bolted to one side of the discharge head, a filter plate is opened on the other side of the discharge head, the filter plate is bolted to one side of the outer wall of the extruder and is located between the discharge head and the extrusion screw, an arc-shaped frame is opened on one side of the discharge pipe, and a track-type forming assembly is rotatably connected to the top of the arc-shaped frame.

[0006] The track-type forming assembly includes a driving sprocket and a driven sprocket, the driving sprocket and the driven sprocket are rotatably connected to the surface of the arc-shaped frame and are connected by a chain, a number of annularly distributed mold frames are fixed to the surface of the chain through pins, a mold core is bolted inside the mold frame, the driving sprocket is integrally connected with a bevel gear through a shaft rod penetrating through its center, the bevel gears are respectively located at the bottom of the arc-shaped frame, and bevel gears are respectively meshed below the bevel gears, and the bevel gears are coaxially connected and rotatably connected to the bottom of the arc-shaped frame through the output end of a servo motor.

[0007] Further preferably, the housing of the extruder outside the extrusion screw is made of double-layer metal material, and a heating module consistent with the length of the extrusion screw and electrically connected to the temperature controller is distributed in the middle layer. One end of the extruder is communicated with the feeding tank, and the angle between the upper and lower parts of the scraper fits along the inner wall of the feeding tank.

[0008] Further preferably, the extrusion screw forms a rotating structure inside the extruder through the first gear and the second gear, and the inner wall of the extruder presents a spiral rib shape with a distance from the extrusion screw.

[0009] Further preferably, the filter plate is made of metal and its surface is composed of a grid-shaped filter grille. The filter plate is located in the cavity on one side of the discharge head and the extruder. The inside of the discharge head is provided with a conical cavity, and the discharge pipe is located at the end with a smaller diameter of the cavity.

[0010] Further preferably, the discharge pipe is a copper pipe made of double-layer metal. The middle layer of the discharge pipe is provided with a heating module distributed in a ring shape and electrically connected to the temperature controller. One end of the discharge pipe extends to one side of the orbital forming assembly and fits against the inner wall of the cavity composed of two mold cores. At the same time, the outer wall of the other end of the discharge pipe is coated with heat insulation cotton.

[0011] Further preferably, the bevel gears are symmetrically and oppositely distributed. The bevel gears respectively form a relative rotational movement through the bevel gears, and a relative transmission motion state is formed between each set of driving sprockets and driven sprockets through the chain.

[0012] Further preferably, the mold frames are closely attached to each other. The mold frames form a transmission structure through the chain, and a plurality of rollers that are connected in a rolling manner are annularly distributed on the surface of the arc-shaped frame at the bottom of the mold frame.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the present utility model, the double-layer structure of the extruder helps to reduce the loss of internal heat. The heating module and the temperature controller inside it can accurately adjust the appropriate temperature required for material extrusion according to needs, ensuring that the plastic is extruded at a suitable temperature. The distribution range of the heating module guarantees the beneficial effect of uniform heating, enabling the material to be heated evenly throughout the extrusion process, avoiding the phenomenon of local overheating or overcooling. The filter plate made of metal can bear greater pressure and wear, improving the service life, and its detachable structure is convenient for cleaning.

[0015] In the present utility model, the discharge pipe helps with heat transfer. Combined with the heating module distributed on its surface, it can maintain the temperature of the internal material, avoiding the problem of blockage inside due to temperature drop, ensuring that the flowing material can be accurately conveyed to the position for forming, guaranteeing the accuracy and stability of forming. The relative movement of the top transmission structure is achieved by using the meshing structure of the bevel gears and the bevel gears, ensuring the synchronism of the top transmission parts. Through this transmission method, the two sets of molds for forming utilize the relative transmission structure to form a complete mold structure, and the continuous injection molding process is achieved under this continuous transmission method. Compared with individual shaping, the processing efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of the present utility model;

[0017] Figure 2 Schematic diagram of the internal structure of the extruder of the present utility model;

[0018] Figure 3 Schematic diagram of the distribution structure of the filter plate of the present utility model;

[0019] Figure 4 Schematic diagram of the structure of the discharge head of the present utility model;

[0020] Figure 5 Schematic diagram of the structure of the track-type forming assembly of the present utility model;

[0021] Figure 6 Schematic top view of the arc-shaped frame and the track-type forming assembly of the present utility model.

[0022] In the figure: 1. Extruder; 2. Feeding tank; 3. Scraper; 4. Extrusion screw; 5. First gear; 6. Second gear; 7. Temperature controller; 8. Discharge head; 9. Discharge pipe; 10. Filter plate; 11. Arc-shaped frame; 12. Track-type forming assembly; 1201. Driving sprocket; 1202. Driven sprocket; 1203. Chain; 1204. Die holder; 1205. Die core; 1206. Bevel gear; 1207. Mitre gear. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1 to 6, the present utility model provides a technical solution: an extrusion molding device for plastic pipe fittings production, including an extruder 1. A feeding tank 2 is opened at the top of the extruder 1. A scraper 3 is rotatably connected inside the feeding tank 2. An extrusion screw 4 is rotatably connected inside the extruder 1. One ends of the shaft heads of the extrusion screw 4 are respectively provided with a first gear 5 and a second gear 6. The first gear 5 is rotatably connected to the inner wall of the extruder 1 through a servo motor and meshed with the lower part of the second gear 6. One end of the shaft head of the extrusion screw 4 penetrates through the center of the second gear 6 and forms an integral connection with it. A temperature controller 7 is opened on one side of the outer wall of the extruder 1. A discharge head 8 is bolted to the other side of the outer wall of the extruder 1. A discharge pipe 9 is bolted to one side of the discharge head 8. A filter plate 10 is opened on the other side of the discharge head 8. The filter plate 10 is bolted to one side of the outer wall of the extruder 1 and is located between the discharge head 8 and the extrusion screw 4. An arc-shaped frame 11 is opened on one side of the discharge pipe 9. A track-type molding component 12 is rotatably connected to the top of the arc-shaped frame 11.

[0025] The track-type molding component 12 includes a driving sprocket 1201 and a driven sprocket 1202. The driving sprocket 1201 and the driven sprocket 1202 are rotatably connected to the surface of the arc-shaped frame 11 and connected by a chain 1203. A number of annularly distributed die holders 1204 are fixed to the surface of the chain 1203 through pins. A die core 1205 is bolted inside the die holder 1204. The driving sprocket 1201 is integrally connected with a bevel gear 1206 through a shaft rod penetrating through its center. The bevel gears 1206 are respectively located at the bottom of the arc-shaped frame 11. Bevel gears 1207 are respectively meshed with the lower parts of the bevel gears 1206. The bevel gears 1207 are coaxially connected and rotatably connected to the bottom of the arc-shaped frame 11 through the output end of a servo motor.

[0026] In this embodiment, as Figure 1 and Figure 2 shown, the housing of the extruder 1 outside the extrusion screw 4 is made of double-layer metal material and a heating module consistent with the length of the extrusion screw 4 and electrically connected to the temperature controller 7 is distributed in the middle layer. One end of the extruder 1 is communicated with the feeding tank 2, and the angle between the upper and lower parts of the scraper 3 fits along the inner wall of the feeding tank 2. The double-layer structure of the extruder 1 helps to reduce the loss of internal heat. The heating module inside it and the temperature controller 7 can accurately adjust the appropriate temperature required for material extrusion according to needs, ensuring that the plastic is extruded at a suitable temperature. The distribution range of the heating module guarantees the beneficial effect of uniform heating, making the material heated evenly during the whole extrusion process, avoiding the phenomenon of local overheating or overcooling. The structural form of the scraper 3 distributed inside the feeding tank 2 can effectively clean the inner wall through the rotating structure, avoiding the possibility of material residue and accumulation on the inner wall of the feeding tank 2.

[0027] In this embodiment, as Figure 2 shown, the extrusion screw 4 forms a rotating structure inside the extruder 1 through the first gear 5 and the second gear 6, and the inner wall of the extruder 1 presents a spiral rib shape with a spacing distance from the extrusion screw 4; the extrusion screw 4 can effectively ensure its rotation inside the extruder 1 at a constant speed and torque by the transmission of the first gear 5 and the second gear 6, thus ensuring the uniformity and stability of the extrusion process. Moreover, the interaction between the shape of the inner wall of the extruder 1 and the extrusion screw 4 can increase the shear force on the material, promote the melting and mixing of the material, improve the uniformity of the material, help to push the material forward, speed up the extrusion speed, and improve the production efficiency.

[0028] In this embodiment, as Figure 3 shown, the filter plate 10 is made of metal material and its surface is composed of a grid-shaped filter grid plate. The filter plate 10 is located in the cavity on one side of the discharge head 8 and the extruder 1. The inner part of the discharge head 8 is provided with a conical cavity, and at the same time, the discharge pipe 9 is located at the end with a smaller diameter of this cavity; the filter plate 10 made of metal material can bear greater pressure and wear, improve the service life, its detachable structure is convenient for cleaning, and it can effectively intercept small particles that are not fully plasticized, improving the quality of subsequent pipe fittings shaping. The conical cavity of the discharge head 8 helps to relieve the pressure fluctuation when the material is extruded after passing through the filter, making it present an orderly flow form and discharging from the discharge pipe 9.

[0029] In this embodiment, as Figure 3 and Figure 4 shown, the discharge pipe 9 is a copper pipe made of double-layer metal material. The middle layer of the discharge pipe 9 is provided with a heating module distributed in a ring shape and electrically connected to the temperature controller 7. One end of the discharge pipe 9 extends to one side of the orbital forming assembly 12 and fits against the inner wall of the cavity composed of two die cores 1205. At the same time, the outer wall of the other end of the discharge pipe 9 is coated with heat insulation cotton; the material of the discharge pipe 9 has good thermal conductivity, which helps to transfer heat. Combined with the heating module distributed on its surface, it can maintain the temperature of the internal material, avoid the problem of blockage inside due to cooling, ensure that the flowing material can be accurately conveyed to the position for forming, guarantee the accuracy and stability of forming, and the heat insulation cotton at the outer end of the discharge pipe 9 can effectively maintain the temperature of the internal material to a certain extent and at the same time avoid the risk of scalding the operator.

[0030] In this embodiment, as Figure 5As shown, the bevel gears 1207 are symmetrically and reversely distributed. The bevel gears 1206 respectively form relative rotational motions through the bevel gears 1207. And a relative transmission motion state is formed between each set of driving sprockets 1201 and driven sprockets 1202 through the chain 1203. The relative motion of the top transmission structure is realized by the meshing structure of the bevel gears 1207 and the bevel gears 1206, ensuring the synchronism of the top transmission parts, thereby improving the quality of product processing. Through this transmission method, two sets of molds for forming realize a complete mold structure by using the relative transmission structure. Under this continuous transmission method, a continuous process of injection molding is achieved. Compared with single molding, the processing efficiency is improved.

[0031] In this embodiment, as Figure 6 shown, the mold bases 1204 are closely attached to each other. And the mold bases 1204 form a transmission structure through the chain 1203. And a plurality of rollers that are rotatably connected to the bottom of the mold base 1204 are annularly distributed on the surface of the arc-shaped frame 11. The structure in which the mold bases 1204 are closely attached to each other effectively realizes the penetration between the mold cores 1205 and also avoids the problem of material leakage. And the roller structure at the bottom of the arc-shaped frame 11 reduces the frictional resistance between the mold base 1204 and it during the transmission process, making the transmission smoother.

[0032] The usage method and advantages of the present utility model: For the extrusion molding device for producing plastic pipe fittings, during use, the working process is as follows:

[0033] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown, it should be noted first that the orbital forming assembly 12 of the device is only for presenting the specific transmission structure. However, during actual operation, in order to better cooperate with the processing process, its length can be adjusted, so as to ensure that the material inside the die core 1205 has sufficient curing time during transmission. Moreover, the upper and lower ends of the orbital forming assembly 12 can be connected to a cold air blower through large pipelines to accelerate its cooling process. And according to different specifications of pipe fitting processing, when the die core 1205 is replaced, the discharge pipe 9 needs to be replaced with a matching specification at the same time. When the device is operating, the pipe orifice at the top of the blanking tank 2 is connected to an external material conveying device through a pipeline. After the material drops into the interior of the blanking tank 2 through the pipe orifice, the conical structure effectively slows down the falling speed of the material, leaving sufficient material processing time for the extruder 1. And the scraper 3 fully stirs and homogenizes the material inside the material. At the same time, since the extrusion screw 4 inside the extruder 1 is coaxially connected to the second gear 6, and the second gear 6 rotates due to the rotation of the first gear 5 driven by a servo motor below, the extrusion screw 4 rotates inside the extruder 1. During the process of the material being pushed forward by the blades on its surface, it comes into contact with the spiral rib-like structure on the inner wall of the extruder 1, thereby increasing the engagement degree and improving the shearing force on the material. And through the preset temperature, after the electrothermal module generates heat, the temperature inside the extruder 1 melts the fragmented material. As the extrusion screw 4 continuously advances, the molten material flows into the cavity of the discharge head 8 through the filter plate 10, and the filter plate 10 can intercept the small plastic particles that are not completely melted. When the extrusion screw 4 rotates to push the material, pressure is generated. Through this pressure, the material flows into the discharge pipe 9 from the opening at the front end of the discharge head 8. The discharge pipe 9 can effectively maintain the temperature of the internal material. When the bevel gear 1207 coaxially connected to the bottom of the front arc-shaped frame 11 rotates simultaneously through a servo motor, the bevel gears 1206 engaged with it rotate in a relative rotation structure at the same time, thereby driving the rotation of the two upper driving sprockets 1201 respectively. And under the connection of the chain 1203, the driving sprockets 1201 drive the driven sprockets 1202 on one side of them to rotate respectively. Through the transmission between the gear sets, the die core 1205 fixed inside the die holder 1204 moves orderly along the surface of the arc-shaped frame 11 with the transmission of the chain 1203. Due to the tight fit between the die holders 1204, only at the two ends of the arc-shaped frame 11 do they separate during the transmission process along with the chain 1203. After leaving this specific area, under the reverse transmission structure, the die holders 1204 on the surfaces of the two orbital forming assemblies 12 will be docked again due to the reverse transmission structure. And the discharge pipe 9 is located there. When the die holder 1204 rotates to this position, it will correspondingly cover the outer wall of the discharge pipe 9, and the internal material will flow out from the opening and flow into the inner wall of the die holder 1204. Since the diameter of the discharge pipe 9 is the same as the inner diameter distance formed between the two die cores 1205, it provides the condition for forming a hollow pipe.Moreover, the mold core 1205 forms a through type through the tight fitting structure of the mold base 1204, and together with the transmission structure, the continuity of pipe shaping is achieved. During the process of combining external air-cooling and continuous transmission, demolding can be completed when it separates from the edge on the other side of the arc-shaped frame 11 again. The completed pipe can be separately cut according to processing requirements.,

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An extrusion molding device for producing plastic pipe fittings, comprising an extruder (1), characterized in that: The top of the extruder (1) is provided with a feed tank (2), the interior of the feed tank (2) is rotatably connected to a scraper (3), the interior of the extruder (1) is rotatably connected to an extrusion screw (4), one end of the shaft head of the extrusion screw (4) is provided with a first gear (5) and a second gear (6), the first gear (5) is rotatably connected to the inner wall of the extruder (1) through a servo motor and meshedly connected to the bottom of the second gear (6), one end of the shaft head of the extrusion screw (4) passes through the axis of the second gear (6) and is integrally connected thereto, the extruder (1) ) a temperature controller (7) is provided on one side of the outer wall of the extruder (1); a discharge head (8) is connected to the other side of the outer wall of the extruder (1) by bolts; a discharge pipe (9) is connected to one side of the discharge head (8) by bolts; a filter plate (10) is provided on the other side of the discharge head (8); the filter plate (10) is connected to one side of the outer wall of the extruder (1) by bolts and is located between the discharge head (8) and the extrusion screw (4); an arc-shaped frame (11) is provided on one side of the discharge pipe (9); and a track-type forming assembly (12) is rotatably connected to the top of the arc-shaped frame (11); The track type forming assembly (12) comprises a driving sprocket (1201) and a driven sprocket (1202), wherein the driving sprocket (1201) and the driven sprocket (1202) are rotatably connected to the surface of the arc-shaped frame (11) and are connected via a chain (1203), wherein a plurality of mold frames (1204) distributed in an annular shape are fixed to the surface of the chain (1203) via a pin shaft, wherein the mold frame (1204) is internally connected with a mold core (1205) via bolts, wherein the driving sprocket (1201) is integrally connected to a bevel gear (1206) via a shaft rod penetrating the axis center thereof, wherein the bevel gear (1206) is respectively located at the bottom of the arc-shaped frame (11), wherein the bevel gear (1207) is meshedly connected to the bottom of the bevel gear (1206), wherein the bevel gears (1207) are coaxially connected to each other and are rotatably connected to the bottom of the arc-shaped frame (11) via the output end of a servo motor.

2. The extrusion molding device for producing plastic pipe fittings according to claim 1, characterized in that: The shell of the extruder (1) located outside the extrusion screw (4) is made of a double-layer metal material, and a heating module with the same length as the extrusion screw (4) and electrically connected to the temperature controller (7) is distributed in the middle layer, and one end of the extruder (1) is connected to the discharge tank (2), and the angle between the upper and lower scrapers (3) is in contact with the inner wall of the discharge tank (2).

3. The extrusion molding device for producing plastic pipe fittings according to claim 1, characterized in that: The extrusion screw (4) forms a rotating structure inside the extruder (1) through the first gear (5) and the second gear (6), and the inner wall of the extruder (1) presents a spiral ridge with a distance from the extrusion screw (4).

4. The extrusion molding device for producing plastic pipe fittings according to claim 1, characterized in that: The filter plate (10) is made of metal and its surface is composed of a mesh filter grid. The filter plate (10) is located in a cavity on one side of the discharge head (8) and the extruder (1). The discharge head (8) has a cavity with a conical structure, and the discharge pipe (9) is located at the end of the cavity with a smaller diameter.

5. The extrusion molding device for producing plastic pipe fittings according to claim 1, characterized in that: The discharge pipe (9) is made of a double-layer copper tube made of metal material, and a heating module is provided in the middle layer of the discharge pipe (9) which is distributed in a ring shape and electrically connected to the temperature controller (7). One end of the discharge pipe (9) extends to one side of the track-type forming component (12) and fits the inner wall of the cavity formed by the two mold cores (1205), and the outer wall of the other end of the discharge pipe (9) is coated with thermal insulation cotton.

6. The extrusion molding device for producing plastic pipe fittings according to claim 1, characterized in that: The bevel gears (1207) are symmetrical and distributed in opposite directions, and the bevel gears (1206) respectively form relative rotational motion through the bevel gears (1207), and each set of driving sprockets (1201) and driven sprockets (1202) form a relative transmission motion state through the chain (1203).

7. The extrusion molding device for producing plastic pipe fittings according to claim 1, characterized in that: The mold frames (1204) are tightly fitted to each other, and a transmission structure is formed between the mold frames (1204) through a chain (1203), and a plurality of rollers rollingly connected to the bottom of the mold frames (1204) are distributed in an annular shape on the surface of the arc-shaped frame (11).

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