Extruder for PET (Polyethylene Terephthalate) sheet production

Abstract

The utility model relates to the technical field of extruders, in particular to an extruder for producing PET (Polyethylene Terephthalate) sheets. According to the technical scheme, the device comprises an extruder barrel and a storage hopper, a connecting pipe head is welded to one side of the upper surface of the extruder barrel, a heat-resistant connecting pipe is fixedly connected to the tail end of the connecting pipe head, a discharging valve is connected to the tail end of the heat-resistant connecting pipe, and the tail end of the discharging valve is fixedly connected to the lower surface of the storage hopper; and a smooth coating is arranged on the inner wall of the heat-resistant connecting pipe. In the use process of the PET sheet extruder, the phenomenon that PET resin raw materials are melted, solidified and adhered due to heat transfer at the joint of the storage hopper and the extruder barrel is avoided, so that the blanking smoothness of the storage hopper is ensured, and blanking blockage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of extruders, in particular to an extruder for producing PET sheets. Background Art

[0002] PET sheet is a transparent plastic sheet made from polyethylene terephthalate (PET resin) raw material through the steps of melt plasticization, extrusion molding, cooling and shaping. It has high transparency and excellent physical properties, which makes it widely used in many fields. Especially in the packaging industry, PET sheet is favored for its excellent transparency, durability and formability. In the food, beverage and pharmaceutical industries, PET sheets are often used to make transparent packaging containers such as bottles and jars. Their transparency can show the contents of the product while providing good sealing and corrosion resistance to effectively maintain product quality. In addition, PET transparent sheets are also used in other fields such as electronic product housings and printing materials, providing high-quality packaging and visual display for various products.

[0003] At present, during the use of the extruder used for PET sheet production, the connection between the storage hopper for storing the PET resin raw material and the extruder barrel for melting and extruding the PET resin is often heated up due to heat transfer, resulting in the PET melting and solidification and adhesion, thereby affecting the normal discharge of the storage hopper and even causing discharge blockage. Therefore, we propose an extruder for PET sheet production. Utility Model Content

[0004] The utility model aims to provide an extruder for producing PET sheets. The utility model has the advantage of preventing the PET resin raw material from melting and solidifying and adhering to the connection between the storage hopper and the extruder barrel due to heat transfer during use of the PET sheet extruder, thereby ensuring smooth material discharge from the storage hopper and avoiding material discharge blockage. The utility model solves the problem that in the current extruder used for PET sheet production, the connection between the storage hopper for storing the PET resin raw material and the extruder barrel for melt-extruding the PET resin often becomes hot due to heat transfer during use, causing the PET to melt and solidify and adhere to the connection, thereby affecting the normal material discharge from the storage hopper and even causing material discharge blockage.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an extruder for PET sheet production, comprising an extruder barrel and a storage hopper, a connecting pipe head welded to one side of the upper surface of the extruder barrel, the end of the connecting pipe head is fixedly connected to a heat-resistant connecting pipe, the end of the heat-resistant connecting pipe is connected to a discharge valve, and the end of the discharge valve is fixedly connected to the lower surface of the storage hopper, and the inner wall of the heat-resistant connecting pipe is provided with a smooth coating.

[0006] Preferably, the connecting pipe head and the heat-resistant connecting pipe are fixedly connected by bolts and a flange.

[0007] Preferably, support rods are symmetrically fixedly connected at both sides of the lower surface of the storage hopper, and the ends of the two support rods are fixedly connected to arc plates, and the extruder barrel is located inside the arc plates.

[0008] Preferably, an observation port is provided on the front surface of the storage hopper, and a transparent plate is fixedly installed inside the observation port.

[0009] Preferably, a hopper cover is provided on the upper surface of the storage hopper, and a handle is fixedly mounted on the upper surface of the hopper cover.

[0010] Preferably, an extrusion screw is rotatably installed inside the extruder barrel, a rotating motor is fixedly installed on the side of the outer surface of the extruder barrel close to the storage hopper, and the end of the output shaft of the rotating motor is fixedly connected to the end of the extrusion screw.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. The utility model achieves the goal of avoiding the phenomenon of melting and solidifying and adhering of PET resin raw material due to heat transfer at the connection between the storage hopper and the extruder barrel during the use of the PET sheet extruder by arranging an extruder barrel, a connecting pipe head, a heat-resistant connecting pipe, a storage hopper and a smooth coating, thereby ensuring the smoothness of material discharge from the storage hopper and avoiding the effect of material discharge blockage. The PET resin raw material inside the storage hopper enters the extruder barrel along the discharge valve and the heat-resistant connecting pipe, and the heat-resistant connecting pipe plays a role in blocking heat transfer to avoid the phenomenon of melting and solidifying and adhering of PET resin raw material due to heat transfer at the connection between the storage hopper and the extruder barrel. When a small amount of PET resin raw material inside the heat-resistant connecting pipe melts due to heat transfer inside the connecting pipe, the provision of the smooth coating also enables the melted PET resin to better slide down from the inner wall of the heat-resistant connecting pipe without solidifying and adhering.

[0013] 2. The utility model supports the storage hopper by arranging the arc plate and the supporting connecting rod, so that more PET resin raw materials can be stored in the storage hopper, thereby improving the stability of the storage hopper.

[0014] 3. The utility model provides an observation port and a transparent plate, so that the amount of PET resin raw material inside the storage hopper can be viewed through the transparent plate inside the observation port, so that the PET resin raw material can be replenished into the storage hopper in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the partial main cross-sectional structure of the heat-resistant connecting pipe of the utility model;

[0018] Figure 4 This is a schematic diagram of the partial main cross-sectional structure of the extruder barrel of the utility model.

[0019] Figure numerals: 1. Extruder barrel; 2. Rotating motor; 3. Arc plate; 4. Support connecting rod; 5. Storage hopper; 6. Hopper cover; 7. Handle; 8. Observation port; 9. Transparent plate; 10. Connecting pipe head; 11. Heat-resistant connecting pipe; 12. Discharge valve; 13. Smooth coating; 14. Extrusion screw. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] like Figures 1-4 As shown, the extruder for producing PET sheets proposed in the present invention includes an extruder barrel 1 and a storage hopper 5. A connecting pipe head 10 is welded to one side of the upper surface of the extruder barrel 1. The end of the connecting pipe head 10 is fixedly connected to a heat-resistant connecting pipe 11. The heat-resistant connecting pipe 11 is made of heat-insulating material. The connecting pipe head 10 and the heat-resistant connecting pipe 11 are fixedly connected by bolts and flanges, which facilitates the disassembly and assembly of the heat-resistant connecting pipe 11 and the storage hopper 5. A discharge valve 12 is connected to the end of the heat-resistant connecting pipe 11, and the end of the discharge valve 12 is fixedly connected to the lower surface of the storage hopper 5. The upper part of the storage hopper 5 is open, and a hopper cover plate 6 is provided on the upper surface of the storage hopper 5. The lower part of the hopper cover plate 6 is open, and the top of the storage hopper 5 is located inside the hopper cover plate 6. A handle 7 is fixedly installed on the upper surface of the hopper cover 6, and a smooth coating 13 is provided on the inner wall of the heat-resistant connecting pipe 11. An observation port 8 is provided on the front surface of the storage hopper 5, and a transparent plate 9 is fixedly installed inside the observation port 8, so that it is convenient to observe the stock of PET resin raw material inside the storage hopper 5 through the transparent plate 9 inside the observation port 8, so as to replenish the PET resin raw material into the storage hopper 5 in time. An extrusion screw 14 is rotatably installed inside the extruder barrel 1, and a rotating motor 2 is fixedly installed on the side of the outer surface of the extruder barrel 1 close to the storage hopper 5. The end of the output shaft of the rotating motor 2 is fixedly connected to the end of the extrusion screw 14. The rotating motor 2 drives the extrusion screw 14 to rotate, and the PET resin raw material inside the extruder barrel 1 is melted and extruded.

[0023] When the present invention is in use, the PET resin raw material inside the storage hopper 5 enters the extruder barrel 1 along the discharge valve 12 and the heat-resistant connecting pipe 11, and the heat-resistant connecting pipe 11 plays a role in blocking heat transfer to avoid the PET resin raw material from melting and solidifying and adhering due to heat transfer at the connection between the storage hopper 5 and the extruder barrel 1, thereby ensuring the smoothness of the storage hopper 5 discharge and avoiding discharge blockage. When a small amount of PET resin raw material inside the heat-resistant connecting pipe 11 melts due to heat transfer inside the connecting pipe, the provision of the smooth coating 13 also enables the melted PET resin to better slide down from the inner wall of the heat-resistant connecting pipe 11 without solidifying and adhering.

[0024] Example 2

[0025] like Figure 1 and Figure 2 As shown, the extruder for PET sheet production proposed in the utility model, compared with Example 1, this embodiment also includes support rods 4 symmetrically fixedly connected at both sides of the lower surface of the storage hopper 5, the ends of the two support rods 4 are fixedly connected to the arc plate 3, and the extruder barrel 1 is located inside the arc plate 3.

[0026] In this embodiment, the arc-shaped plate 3 and the supporting link 4 support the storage hopper 5 so that more PET resin raw materials can be stored inside the storage hopper 5, thereby improving the stability of the storage hopper 5.

[0027] The above specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An extruder for producing PET sheets, comprising an extruder barrel (1) and a storage hopper (5), characterized in that: A connecting pipe head (10) is welded to one side of the upper surface of the extruder barrel (1), and a heat-resistant connecting pipe (11) is fixedly connected to the end of the connecting pipe head (10), and a discharge valve (12) is connected to the end of the heat-resistant connecting pipe (11), and the end of the discharge valve (12) is fixedly connected to the lower surface of the storage hopper (5), and the inner wall of the heat-resistant connecting pipe (11) is provided with a smooth coating (13).

2. The PET sheet production extruder according to claim 1, characterized in that: The connecting pipe head (10) and the heat-resistant connecting pipe (11) are fixedly connected via bolts and a flange.

3. The PET sheet production extruder according to claim 1, characterized in that: Support connecting rods (4) are symmetrically fixedly connected at both sides of the lower surface of the storage hopper (5), and the ends of the two support connecting rods (4) are fixedly connected to arc plates (3), and the extruder barrel (1) is located inside the arc plates (3).

4. The PET sheet production extruder according to claim 1, wherein: The front surface of the storage hopper (5) is provided with an observation port (8), and a transparent plate (9) is fixedly installed inside the observation port (8).

5. The PET sheet production extruder according to claim 1, characterized in that: The upper surface of the storage hopper (5) is provided with a hopper cover plate (6), and the upper surface of the hopper cover plate (6) is fixedly mounted with a handle (7).

6. The PET sheet production extruder according to claim 1, characterized in that: An extrusion screw (14) is rotatably mounted inside the extruder barrel (1), and a rotating motor (2) is fixedly mounted on a side of the outer surface of the extruder barrel (1) close to the storage hopper (5), and the end of the output shaft of the rotating motor (2) is fixedly connected to the end of the extrusion screw (14).

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