Plastic extruding machine for producing plastic PVC (polyvinyl chloride) pipe

Abstract

The utility model discloses a plastic extruding machine for producing a plastic PVC (polyvinyl chloride) pipe, which comprises a machine base, a screw conveyor, a forming die and a hopper, a fixed cover is arranged on one side of the top end of the hopper, a movable cover is arranged on the other side of the top end of the hopper, and a flow guide pipe for guiding gas is arranged in the hopper. Bevel pipes used for turning over PVC raw material particles are arranged on the two sides of the middle of the outer wall of the flow guide pipe, gas spraying holes are annularly formed in the outer walls of the bevel pipes at equal intervals in a penetrating mode, and an air inducing barrel used for introducing gas is arranged at the top of the flow guide pipe. Through mutual cooperation of a flow guide pipe, a bevel pipe, an air spraying hole, a heating wire, an air inducing barrel, a turbofan, a worm gear, a worm and a driving motor, by means of a blowing and turning combined mode, on one hand, stacked PVC raw material particles can be rapidly dried, on the other hand, the PVC raw material particles can be evenly stirred, the viscosity of the PVC raw material particles is reduced, and the PVC raw material particles can be evenly stirred. And the overall flow velocity of the PVC raw material particles is also improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe production, in particular to an extruder for producing plastic PVC pipes. Background Art

[0002] Polyvinyl chloride, abbreviated as PVC in English, is a polymer formed by the polymerization of vinyl chloride monomer (VCM) in the presence of initiators such as peroxides and azo compounds or under the action of light or heat according to the free radical polymerization mechanism. There are two types of PVC: hard and soft. Among them, hard PVC is not only used for building pipes, doors and windows, but also for making plastic bottles, packaging, bank cards or membership cards. In addition, adding plasticizers can make PVC softer and more elastic, and it can be used for pipes, cable insulation, flooring, signs, phonograph records, inflatable products and rubber substitutes.

[0003] The extruder plays a vital role in the production process of plastic PVC pipes. The existing extruder generally includes a machine base, a screw conveyor, a hopper and a molding die. When in use, the PVC raw material particles first enter the screw conveyor through the hopper, then are heated and melted by the screw conveyor, and finally are extruded and molded through the molding die. However, due to the small particle size of the PVC raw material particles, and the fact that the PVC raw material particles may not be dried before use, the PVC raw material particles may have a large viscosity, causing the overall flow rate to slow down. On the one hand, the probability of PVC raw material particles being blocked at the outlet of the hopper is increased, and on the other hand, it is easy to affect the molding quality of the plastic PVC pipe. For this reason, an extruder for the production of plastic PVC pipes is provided. Utility Model Content

[0004] The utility model aims to provide an extruder for producing plastic PVC pipes to solve the technical problems raised in the background technology.

[0005] To achieve the above purpose, the specific technical scheme of the utility model is as follows: an extruder for producing plastic PVC pipes, comprising a machine base, a screw conveyor, a forming mold and a hopper, wherein the screw conveyor is arranged at the top of the machine base, the forming mold is arranged at the end of the screw conveyor, the hopper is arranged above the screw conveyor and away from the forming mold, a fixed cover is arranged on one side of the top of the hopper, and a movable cover is arranged on the other side of the top of the hopper, a guide pipe for guiding gas is arranged inside the hopper, and the guide pipe has a Angle tubes for turning over PVC raw material particles are arranged on both sides of the middle of the outer wall, the angle tubes are fixedly connected to the guide pipe, the outer wall of the angle tube is annularly provided with air injection holes at equal intervals, the top of the guide pipe is provided with an air induced tube for introducing gas, the inner wall of the air induced tube is wound with a heating wire for heating the introduced gas, a turbine fan is installed inside the air induced tube at a position above the heating wire, a worm gear is installed on the outer wall of the guide pipe at a position above the fixed cover, and a worm is arranged outside the worm gear.

[0006] Preferably, the guide tube is coaxial with the hopper, the top end of the guide tube passes through the lower end surface of the fixed cover and extends to the top of the fixed cover, the guide tube is rotatably connected to the fixed cover via a bearing, and the bottom of the guide tube is in a blocked state.

[0007] Preferably, the bottom of the angled tube is in a blocked state, the inner cavity of the angled tube is connected to the inner cavity of the guide tube, a guide rod for diverting the PVC raw material particles is detachably provided in the middle of the bottom end of the guide tube, the guide rod is designed in a conical structure, and the outer wall of the guide rod is provided with twisted blades for stirring the PVC raw material particles, and the twisted blades are integrally formed with the guide rod.

[0008] Preferably, the induced draft tube is connected to the guide tube, an air inlet is provided at the top of the induced draft tube, the bottom opening of the induced draft tube is communicated with the top opening of the guide tube, the worm is meshed with the worm wheel, a bearing seat is provided outside the worm, the bearing seat is connected to the fixing cover, the worm and the bearing seat are rotatably connected via a bearing, and the outer end of the worm is connected and assembled to the output end of an external drive motor.

[0009] Preferably, a transfer tube for discharging PVC raw material particles is provided in the middle of the bottom end of the hopper, the top end of the transfer tube is connected to the bottom end of the hopper, and the bottom end of the transfer tube is connected to the inlet end of the screw conveyor.

[0010] Preferably, the top opening of the transfer tube is communicated with the bottom opening of the hopper, the fixed cover is connected to the hopper via a fastener, and the movable cover is rotatably connected to the fixed cover via a hinge.

[0011] The utility model is a plastic PVC pipe production extruder with the following advantages:

[0012] 1. The utility model cooperates with the guide pipe, the angled pipe, the air jet hole, the heating wire, the induced draft tube, the turbo fan, the worm gear, the worm and the driving motor, and uses the blowing and flipping method to quickly dry the accumulated PVC raw material particles on the one hand, and evenly stir the PVC raw material particles on the other hand, which not only reduces the viscosity of the PVC raw material particles, but also improves the overall flow rate of the PVC raw material particles, and reduces the probability of clogging of the PVC raw material particles at the outlet of the hopper.

[0013] 2. The utility model can divert and transport PVC raw material particles in the flow process through the cooperation of the guide rod and the twisted blade, further reducing the possibility of blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

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

[0016] Figure 2 It is a plan cross-sectional view of the transfer tube, hopper and induced draft tube of the utility model;

[0017] Figure 3 It is a schematic diagram of the fixed cover structure of the utility model.

[0018] Explanation of the markings in the figure: 1. Machine base; 2. Screw conveyor; 3. Forming mold; 4. Hopper; 401. Guide rod; 402. Hinge blade; 403. Jet hole; 404. Angle pipe; 405. Guide pipe; 406. Heating wire; 407. Air duct; 408. Turbine fan; 409. Worm gear; 410. Bearing seat; 411. Worm; 412. Driving motor; 5. Transfer pipe; 6. Fixed cover; 7. Movable cover. DETAILED DESCRIPTION

[0019] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0020] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0022] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0023] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0024] In order to better understand the purpose, structure and function of the utility model, the following is a further detailed description of the utility model of an extruder for producing plastic PVC pipes in conjunction with the accompanying drawings.

[0025] like Figure 1-3As shown, the utility model is an extruder for producing plastic PVC pipes, comprising a machine base 1, a screw conveyor 2, a molding die 3 and a hopper 4. The screw conveyor 2 is arranged at the top of the machine base 1, and is used to convey and melt the PVC raw material particles. The molding die 3 is arranged at the end of the screw conveyor 2, and is used to extrude and mold the melted PVC raw material. The hopper 4 is arranged above the screw conveyor 2 and away from the molding die 3, and is used to store the PVC raw material particles. As a prior art, this case will not be described in detail. In the equipment, a transfer tube 5 for discharging the PVC raw material particles is arranged in the middle of the bottom end of the hopper 4, a fixed cover 6 is arranged on one side of the top end of the hopper 4, and a movable cover 7 is arranged on the other side of the top end of the hopper 4.

[0026] Specifically, the top of the transfer tube 5 is connected to the bottom of the hopper 4, and the bottom of the transfer tube 5 is connected to the inlet end of the screw conveyor 2, the top opening of the transfer tube 5 is connected to the bottom opening of the hopper 4, the fixed cover 6 is connected to the hopper 4 by fasteners, the movable cover 7 is rotatably connected to the fixed cover 6 by hinges, and the interior of the hopper 4 is provided with a guide tube 405 for guiding the gas, the guide tube 405 is coaxial with the hopper 4, the top of the guide tube 405 passes through the lower end surface of the fixed cover 6 and extends to the top of the fixed cover 6, the guide tube 405 is rotatably connected to the fixed cover 6 by bearings, the bottom of the guide tube 405 is in a blocked state, and the middle of the outer wall of the guide tube 405 is provided on both sides for guiding the gas. An angled tube 404 for turning over the PVC raw material particles is fixedly connected to a guide tube 405, the bottom of the angled tube 404 is in a blocked state, the inner cavity of the angled tube 404 is connected to the inner cavity of the guide tube 405, the outer wall of the angled tube 404 is annularly provided with air injection holes 403 at equal intervals for discharging the gas inside the angled tube 404, and a guide rod 401 for diverting the PVC raw material particles is detachably provided in the middle of the bottom end of the guide tube 405, the guide rod 401 is designed in a conical structure, and the outer wall of the guide rod 401 is provided with a twisted blade 402 for stirring the PVC raw material particles, and the twisted blade 402 and the guide rod 401 are integrally formed.

[0027] Furthermore, an air duct 407 for introducing gas is provided at the top of the air guide pipe 405, the air duct 407 is connected to the air guide pipe 405, an air inlet is provided at the top of the air duct 407, the bottom opening of the air duct 407 is connected to the top opening of the air guide pipe 405, a heating wire 406 for heating the introduced gas is wound around the inner wall of the air duct 407, and a turbine fan 408 is installed above the heating wire 406 inside the air duct 407, which is used to pass the external gas through the air duct 407, the air guide pipe 405, The angled tube 404 and the jet hole 403 are injected into the hopper 4, and a worm gear 409 is installed on the outer wall of the guide tube 405 above the fixed cover 6. A worm 411 is arranged outside the worm gear 409 for driving the guide tube 405 in cooperation with the worm gear 409. The worm 411 is meshed with the worm gear 409, and a bearing seat 410 is arranged outside the worm 411. The bearing seat 410 is connected to the fixed cover 6, and the worm 411 is rotatably connected to the bearing seat 410 through a bearing, and the outer end of the worm 411 is connected and assembled to the output end of an external drive motor 412.

[0028] According to the above, the utility model cooperates with the guide pipe 405, the angled pipe 404, the jet hole 403, the heating wire 406, the induced draft tube 407, the turbo fan 408, the worm gear 409, the worm 411 and the driving motor 412, and uses a combination of blowing and flipping. On the one hand, it can quickly dry the accumulated PVC raw material particles, and on the other hand, it can evenly stir the PVC raw material particles, which not only reduces the viscosity of the PVC raw material particles, but also increases the overall flow rate of the PVC raw material particles, and reduces the probability of PVC raw material particles being blocked at the outlet position of the hopper 4; the utility model cooperates with the guide rod 401 and the twisted blade 402 to divert and transport the PVC raw material particles in the flow process, further reducing the possibility of blockage.

[0029] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An extruder for producing plastic PVC pipes, comprising a machine base (1), a screw conveyor (2), a forming die (3) and a hopper (4), wherein the screw conveyor (2) is arranged on the top of the machine base (1), the forming die (3) is arranged at the end of the screw conveyor (2), and the hopper (4) is arranged above the screw conveyor (2) and away from the forming die (3), characterized in that: A fixed cover (6) is provided on one side of the top of the hopper (4), and a movable cover (7) is provided on the other side of the top of the hopper (4). A flow guide pipe (405) for guiding gas is provided inside the hopper (4). Angle pipes (404) for turning over PVC raw material particles are provided on both sides of the middle of the outer wall of the flow guide pipe (405). The angle pipes (404) are fixedly connected to the flow guide pipe (405). The outer wall of the angle pipe (404) is annularly provided with air injection holes (404) at equal intervals. 3), an air duct (407) for introducing gas is arranged at the top of the air duct (405), a heating wire (406) for heating the introduced gas is wound around the inner wall of the air duct (407), a turbine fan (408) is installed inside the air duct (407) at a position above the heating wire (406), a worm gear (409) is installed on the outer wall of the air duct (405) at a position above the fixed cover (6), and a worm (411) is arranged outside the worm gear (409).

2. The extruder for producing plastic PVC pipes according to claim 1, characterized in that: The guide tube (405) is coaxial with the hopper (4); the top end of the guide tube (405) penetrates the lower end surface of the fixed cover (6) and extends to the top of the fixed cover (6); the guide tube (405) is rotatably connected to the fixed cover (6) via a bearing; and the bottom of the guide tube (405) is in a blocked state.

3. The extruder for producing plastic PVC pipes according to claim 1, characterized in that: The bottom of the angled tube (404) is in a blocked state, the inner cavity of the angled tube (404) is in communication with the inner cavity of the guide tube (405), a guide rod (401) for diverting PVC raw material particles is detachably provided at the middle of the bottom end of the guide tube (405), the guide rod (401) is designed in a conical structure, and the outer wall of the guide rod (401) is provided with a twisted blade (402) for stirring the PVC raw material particles, and the twisted blade (402) and the guide rod (401) are integrally formed.

4. The extruder for producing plastic PVC pipes according to claim 1, characterized in that: The induced draft tube (407) is connected to the air guide tube (405); an air inlet is provided at the top of the induced draft tube (407); a bottom opening of the induced draft tube (407) is communicated with a top opening of the air guide tube (405); the worm (411) is meshed with a worm wheel (409); a bearing seat (410) is provided outside the worm (411); the bearing seat (410) is connected to the fixing cover (6); the worm (411) is rotatably connected to the bearing seat (410) via a bearing; and the outer end of the worm (411) is connected and assembled to an output end of an external drive motor (412).

5. The extruder for producing plastic PVC pipes according to claim 1, characterized in that: A transfer tube (5) for discharging PVC raw material particles is provided in the middle of the bottom end of the hopper (4), the top end of the transfer tube (5) is connected to the bottom end of the hopper (4), and the bottom end of the transfer tube (5) is connected to the inlet end of the screw conveyor (2).

6. The extruder for producing plastic PVC pipes according to claim 5, characterized in that: The top opening of the transfer tube (5) is connected to the bottom opening of the hopper (4), the fixed cover (6) is connected to the hopper (4) via a fastener, and the movable cover (7) is rotatably connected to the fixed cover (6) via a hinge.

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