Feeding lifting device for PVC plastic particle production

Abstract

The utility model relates to the technical field of PVC (polyvinyl chloride) plastic particle production, in particular to a charging lifting device for PVC plastic particle production, which comprises a lifting charging barrel, a lifting motor and a discharging hopper are arranged on the lifting charging barrel, an extruder body is arranged below the lifting charging barrel, a charging hopper is arranged on the extruder body, and a preheating box is arranged on the lifting charging barrel. A mounting plate and a material conveying pipe are arranged on the preheating box, an electric control valve and a material expanding cover are arranged on the material conveying pipe, a sealing sleeve is arranged on the material expanding cover, a controller and an air cylinder are arranged on the mounting plate, a time relay is arranged on the controller, a heat preservation layer and a heating wire are arranged on the preheating box, a motor is arranged on the preheating box, and a stirring shaft is arranged on the motor. And stirring blades are arranged on the stirring shaft. And the condition that mixed external dust enters in the lifting and feeding process is avoided, the time for adding the materials into the extruder body to be heated to form a molten state in the later period can be greatly shortened, and heat dissipation in the stirring and heating process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC plastic particle production, in particular to a feeding and lifting device for PVC plastic particle production. Background Technique

[0002] PVC plastic particles, namely polyvinyl chloride particles, are a widely used thermoplastic plastic particle. PVC has excellent chemical stability and mechanical properties and is widely used in fields such as building materials, packaging materials, electronic appliances, and medical devices.

[0003] The production process of PVC plastic particles generally includes first preparing raw materials, then putting the granular raw materials into a screw extruder. Through heating and shearing actions, the molten material is extruded through a die head to form continuous strips, and finally these strips are cooled and cut to form granular PVC plastic particles.

[0004] Currently, in the existing production process of PVC plastic particles, generally, workers directly feed the granular raw materials into a preset feeding hopper on the screw extruder. This manual feeding method has poor stability and accuracy, and weak sealing performance. It is easy to mix external dust during the feeding process, which will greatly affect the quality of the final PVC plastic particle products.

[0005] Moreover, the granular raw materials are at room temperature before feeding, which will increase the time required to heat them to a molten state after being added to the screw extruder, greatly reducing the production efficiency.

[0006] Therefore, a feeding and lifting device for PVC plastic particle production is needed to solve the above problems. Content of the Utility Model

[0007] The purpose of the utility model is to propose a feeding and lifting device for PVC plastic particle production to solve the above-mentioned disadvantages existing in the prior art.

[0008] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0009] Design a feeding and lifting device for PVC plastic particle production, including a lifting hopper. A lifting motor and a discharging hopper are arranged on the lifting hopper. A hopper cover is arranged on the discharging hopper. An extruder body is arranged below the lifting hopper. A feeding hopper is arranged on the extruder body. A preheating box is arranged on the lifting hopper;

[0010] The preheating box is provided with a mounting plate and a feeding pipe. The feeding pipe is provided with an electric control valve and a material expanding cover. The material expanding cover is provided with a sealing sleeve. The mounting plate is provided with a controller and a cylinder. The cylinder is provided with a connecting block. The controller is provided with a time relay.

[0011] The preheating box is provided with a heat preservation layer and heating wires. The preheating box is provided with a motor. The motor is provided with a stirring shaft. The stirring shaft is provided with stirring blades.

[0012] Furthermore, the whole feeding pipe is of a stainless steel telescopic rod structure. The inside of the feeding pipe is a hollow cavity and is communicated with the inner cavity of the preheating box.

[0013] Furthermore, the upper end of the discharging hopper is open, and the hopper cover is extruded and covered on the discharging hopper.

[0014] Furthermore, the whole material expanding cover is of a downward diffusing horn structure. The whole connecting block is of a T-shaped structure and is fixedly arranged on the outer wall surface of the material expanding cover.

[0015] Furthermore, the whole sealing sleeve is of a hollow pipe body structure and is communicated with the inner cavity of the material expanding cover. The inner wall surface of the lower end opening of the sealing sleeve is of an inclined surface structure.

[0016] Furthermore, the heat preservation layer is uniformly arranged along the outer wall surface of the preheating box. The heating wires are embedded on the inner wall of the preheating box.

[0017] Furthermore, there are four stirring blades arranged in a circle. Mixing holes are opened on the stirring blades. The mixing holes are arranged in two groups horizontally. Each group has eight vertically arranged ones and penetrates through the stirring blades.

[0018] A feeding and lifting device for PVC plastic particle production proposed by the present utility model has the following beneficial effects:

[0019] 1. By means of an electric control type vertical moving sealing sleeve connection structure, before lifting and feeding granular raw materials, the feeding hopper on the extruder body is integrally and comprehensively sealed, avoiding the situation of external dust mixing in during the lifting and feeding process, and thus greatly ensuring the quality of the final PVC plastic particle products.

[0020] 2. By arranging a preheating box on the lifting barrel and arranging a stirring and heating structure on the preheating box, before adding granular raw materials into the feeding hopper, electric control stirring preheating of the granular raw materials is realized for a period of time, realizing preheating and softening of the granular raw materials, which will greatly reduce the time required for heating to a molten state in the extruder body later, and thus improve the production efficiency of the final PVC plastic particle products.

[0021] 3. The utility model avoids the external dissipation of heat during the stirring and heating process by arranging a heat preservation layer on the outer wall of the preheating box. Brief Description of the Drawings

[0022] Figure 1 is a three-dimensional schematic diagram of the overall structure of the utility model;

[0023] Figure 2 of the utility model Figure 1 is a three-dimensional schematic diagram of the lifting hopper with a sealing sleeve structure in the utility model;

[0024] Figure 3 is a front view schematic diagram of the overall structure of the utility model;

[0025] Figure 4 of the utility model Figure 3 is a partial enlarged view at A in the utility model;

[0026] Figure 5 of the utility model Figure 3 is a partial enlarged view at B in the utility model;

[0027] Figure 6 is a block diagram of the utility model.

[0028] In the figure: 1 is the lifting hopper; 11 is the lifting motor; 12 is the discharging hopper; 13 is the hopper cover; 2 is the preheating box; 21 is the heat preservation layer; 22 is the heating wire; 3 is the extruder body; 31 is the feeding hopper; 4 is the conveying pipe; 41 is the electric control valve; 5 is the material expanding cover; 51 is the sealing sleeve; 6 is the mounting plate; 61 is the cylinder; 62 is the connecting block; 7 is the controller; 71 is the time relay; 8 is the motor; 81 is the stirring shaft; 82 is the stirring blade; 83 is the mixing hole. Detailed Embodiment

[0029] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments.

[0030] Referring to Figures 1-6 , a feeding and lifting device for PVC plastic particle production includes a lifting hopper 1, a lifting motor 11 and a discharging hopper 12 are arranged on the lifting hopper 1, a hopper cover 13 is arranged on the discharging hopper 12, an extruder body 3 is arranged below the lifting hopper 1, a feeding hopper 31 is arranged on the extruder body 3, and a preheating box 2 is arranged on the lifting hopper 1;

[0031] A mounting plate 6 and a conveying pipe 4 are arranged on the preheating box 2, an electric control valve 41 and a material expanding cover 5 are arranged on the conveying pipe 4, a sealing sleeve 51 is arranged on the material expanding cover 5, a controller 7 and a cylinder 61 are arranged on the mounting plate 6, a connecting block 62 is arranged on the cylinder 61, and a time relay 71 is arranged on the controller 7;

[0032] The preheating box 2 is provided with a heat preservation layer 21 and heating wires 22. A motor 8 is provided on the preheating box 2, a stirring shaft 81 is provided on the motor 8, and stirring blades 82 are provided on the stirring shaft 81. The lifting hopper 1 and the extruder body 3 are both prior arts. Combined with the lifting motor 11, granular raw materials can be lifted and conveyed into the preheating box 2. Some existing structures are not drawn and labeled, so there is no need to elaborate.

[0033] A PLC is preset in the controller 7, and the time relay 71 is a prior art.

[0034] A filter screen is preset in the feeding hopper 12, which can filter large particle impurities to ensure the cleanliness of the granular raw materials.

[0035] The whole material conveying pipe 4 is of a stainless steel telescopic rod structure. The inside of the material conveying pipe 4 is a hollow cavity and is communicated with the inner cavity of the preheating box 2. The telescopic rod of the air cylinder 61 is fixedly arranged with the connecting block 62. When the telescopic rod of the air cylinder 61 stretches downward or upward, it can drive the material spreading cover 5 and the sealing sleeve 51 to move downward or upward. At this time, the material conveying pipe 4 itself will have a real-time telescopic effect without affecting the feeding.

[0036] The upper end of the feeding hopper 12 is open, and the hopper cover 13 is pressed and covered on the feeding hopper 12 to ensure that external dust does not fall into the feeding hopper 12 during lifting and feeding.

[0037] The whole material spreading cover 5 is of a downward-diffusing horn structure. The whole connecting block 62 is of a T-shaped structure and is fixedly arranged on the outer wall surface of the material spreading cover 5. The diffusing horn structure can add the granular raw materials to the feeding hopper 31 in a downward-diffusing manner to avoid blockage.

[0038] The whole sealing sleeve 51 is of a hollow tube structure and is communicated with the inner cavity of the material spreading cover 5. The sealing sleeve 51 is made of high-elastic vulcanized rubber material and is heat-resistant.

[0039] The inner wall surface of the lower end opening of the sealing sleeve 51 is of an inclined surface structure, which improves the smooth extrusion and sleeving of the sealing sleeve 51 on the feeding hopper 31.

[0040] The heat preservation layer 21 is evenly arranged along the outer wall surface of the preheating box 2, and the heat preservation layer 21 is made of polystyrene foam.

[0041] The heating wires 22 are embedded on the inner wall of the preheating box 2. The heating wires 22 are of the dry-burning type and have high heating efficiency. Combined with the preheating box 2 made of aluminum alloy material, the heat can be quickly transferred to the preheating box 2.

[0042] There are four stirring vanes 82 arranged in a circle. Mixing holes 83 are provided on the stirring vanes 82. The mixing holes 83 are arranged in two groups horizontally. Each group has eight holes arranged vertically and penetrates through the stirring vanes 82. During uniform stirring, granular raw materials will pass through each mixing hole 83, further increasing the effective contact area with heat.

[0043] Working mode: Put a certain amount of granular raw materials into the feeding hopper 12, then seal it with the hopper lid 13, and then start the controller 7. The PLC in the controller 7 will control the start of the cylinder 61 to drive the sealing sleeve 51 to move downward. When the sealing sleeve 51 completely seals the feeding hopper 31, the PLC in the controller 7 will control the stop of the cylinder 61 and start the lifting motor 11 to lift the granular raw materials into the preheating box 2 through the lifting cylinder 1. Then the PLC in the controller 7 will control the opening of the electric control valve 41, and the granular raw materials can be added downward into the feeding hopper 31, avoiding the situation of mixing external dust during the lifting and feeding process, and thus greatly ensuring the quality of the final PVC plastic particle products.

[0044] Moreover, before adding the granular raw materials into the feeding hopper 31, the opening and closing time will be preset on the time relay 71 in advance. Then the PLC in the controller 7 will control the start of the motor 8 and the heating wire 22 for a period of time to drive the stirring vanes 82 to rotate, thereby realizing the electric control stirring and preheating of the granular raw materials in the preheating box 2 for a period of time, realizing the preheating and softening of the granular raw materials, which will greatly reduce the time required for the subsequent heating in the extruder body 3 to form a molten state, and thus improve the production efficiency of the final PVC plastic particle products.

[0045] In addition, by setting a heat insulation layer 21 on the outer wall of the preheating box 2, the outward dissipation of heat during the stirring and heating process is avoided.

[0046] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A feeding and lifting device for PVC plastic particle production, comprising a lifting hopper (1), characterized in that: The lifting hopper (1) is provided with a lifting motor (11) and a discharging hopper (12). A hopper cover (13) is arranged on the discharging hopper (12). An extruder body (3) is arranged below the lifting hopper (1). A feeding hopper (31) is arranged on the extruder body (3). A preheating box (2) is arranged on the lifting hopper (1); The preheating box (2) is provided with a mounting plate (6) and a feeding pipe (4). An electric control valve (41) and a material expanding hood (5) are arranged on the feeding pipe (4). A sealing sleeve (51) is arranged on the material expanding hood (5). A controller (7) and a cylinder (61) are arranged on the mounting plate (6). A connecting block (62) is arranged on the cylinder (61). A time relay (71) is arranged on the controller (7); The preheating box (2) is provided with a heat preservation layer (21) and heating wires (22). A motor (8) is arranged on the preheating box (2). A stirring shaft (81) is arranged on the motor (8). Stirring blades (82) are arranged on the stirring shaft (81).

2. The feeding and lifting device for PVC plastic particle production according to claim 1, wherein: The whole feeding pipe (4) is of a stainless steel telescopic rod structure. The inside of the feeding pipe (4) is a hollow cavity and is communicated with the inner cavity of the preheating box (2).

3. The feeding and lifting device for PVC plastic particle production according to claim 1, characterized in that: The upper end of the discharging hopper (12) is open. The hopper cover (13) is pressed and covered on the discharging hopper (12).

4. A feeding and lifting device for PVC plastic particle production according to claim 1, characterized in that: The whole material expanding hood (5) is of a downward diffusing horn structure. The whole connecting block (62) is of a T-shaped structure and is fixedly arranged on the outer wall surface of the material expanding hood (5).

5. A feeding and lifting device for PVC plastic particle production according to claim 1, characterized in that: The whole sealing sleeve (51) is of a hollow tube structure and is communicated with the inner cavity of the material expanding hood (5). The inner wall surface of the lower end opening of the sealing sleeve (51) is of an inclined surface structure.

6. The feeding and lifting device for PVC plastic particle production according to claim 1, characterized in that: The heat preservation layer (21) is uniformly arranged along the outer wall surface of the preheating box (2). The heating wires (22) are embedded on the inner wall of the preheating box (2).

7. A feeding and lifting device for PVC plastic particle production according to claim 1, characterized in that: There are four stirring blades (82) arranged in a circle. Mixing holes (83) are arranged on the stirring blades (82). The mixing holes (83) are arranged in two groups horizontally. Each group has eight arranged vertically and penetrates through the stirring blades (82).

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