A plastic extruder with pre-drying function
By designing a pre-drying mechanism in the plastic extruder, using spiral blades and heating plates to pre-dry the plastic granules, the problem of humidity affecting the instability of the melting process is solved, improving production efficiency and product quality, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU XIFU PLASTIC PROD CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-06-30
AI Technical Summary
In the prior art, when plastic extruders process plastic granules, high humidity leads to unstable melting processes, affecting product quality. Furthermore, additional pre-treatment with a dryer is required, increasing production and time costs.
A pre-dried plastic extruder was designed, comprising a feed hopper, a power unit, a spiral blade, and a heating mechanism. The spiral blade conveys and the heating plate pre-dries the plastic granules, achieving uniform drying and compaction during the extrusion process, thus ensuring the specific application areas and products of the materials.
It improves the stability and production efficiency of the plastic extrusion process, reduces production costs, and ensures product quality uniformity and production efficiency.
Smart Images
Figure CN224426407U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic extruder technology, and in particular to a plastic extruder with pre-drying function. Background Technology
[0002] As a key piece of equipment in plastic molding and processing, plastic extruders play an extremely important role in the plastics industry. Their working principle is to realize the solid conveying, compaction, melting, mixing and final extrusion molding of plastics through external power transmission and heat transfer from external heating elements. With social development and technological progress, plastic products have been widely used in many fields, which has also put forward increasingly higher requirements for the performance and quality of plastic extruders.
[0003] In the early stages of plastic extruder development, the equipment was relatively simple in structure and function, directly feeding plastic granules into the extruder for heating and compaction. However, as time went on, its limitations gradually became apparent. Modern plastic extruders have seen significant improvements in technology and function, enabling them to produce plastic products of various complex shapes and materials to meet diverse market demands. However, in actual production, many plastic raw materials have high moisture content. If directly fed into the extruder, the moisture in the raw materials will affect the melting rate of the plastic, leading to an unstable melting process and consequently affecting product quality. The traditional solution is to pre-dry the plastic granules using a dryer before feeding them into the extruder, which greatly affects the working efficiency of the plastic extruder and increases the production and time costs for enterprises. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a plastic extruder with pre-drying, which aims to improve the problem in the prior art where plastic granules are pre-dried using a dryer before being fed into the extruder, which greatly affects the working efficiency of the plastic extruder and increases the production and time costs for enterprises.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a plastic extruder with pre-drying function, comprising a mounting block, an extrusion mechanism being provided on the top of the mounting block for extruding plastic, a pre-drying mechanism being provided on the top of the extrusion mechanism for uniform feeding, and a heating mechanism being provided on the inner wall of the pre-drying mechanism.
[0006] The extrusion mechanism includes a power assembly, which is located on the top of the mounting block. A rotating shaft is provided at one end of the power assembly. A spiral blade is fixedly connected to the outer wall of the rotating shaft. A housing is provided on the outer side of the spiral blade. An extrusion assembly is provided at one end of the housing. A base is fixedly connected to the bottom of the housing.
[0007] As a further description of the above technical solution:
[0008] The pre-drying mechanism includes a feeding hopper, which is connected to the top of the outer shell. A second motor is fixedly connected to the outer wall of the feeding hopper. The output end of the second motor passes through the outer wall of the feeding hopper and is provided with a transmission assembly. A rotating column is provided at the top of the transmission assembly. Multiple rotating components are provided on the outer wall of the rotating column. A protective sleeve is provided at the bottom of the rotating column.
[0009] As a further description of the above technical solution:
[0010] The power assembly includes a motor, which is fixed on the top surface of the mounting block. A speed reducer is provided at the output end of the motor, and the other end of the speed reducer is fixedly connected to one end of the rotating shaft.
[0011] As a further description of the above technical solution:
[0012] The extrusion assembly includes an extrusion block, which is fixed to one end of the housing, and a cooling forming sleeve is threaded to one end of the outer wall of the housing.
[0013] As a further description of the above technical solution:
[0014] The transmission assembly includes a bevel gear one, the middle part of which is fixedly connected to the output end of the motor two, and the outer wall of the bevel gear one is meshed with the bevel gear two.
[0015] As a further description of the above technical solution:
[0016] The rotating assembly includes a tilting disk, which is fixed to the outer wall of the rotating column, and a plurality of guide strips are fixedly connected to the top surface of the tilting disk.
[0017] As a further description of the above technical solution:
[0018] The heating mechanism includes a positioning ring, which is fixed to the inner wall of the feed hopper. A mounting sleeve is provided on the top of the positioning ring, and a heating plate is provided on the inner wall of the mounting sleeve.
[0019] As a further description of the above technical solution:
[0020] The outer wall of the mounting block is provided with a control box, and the outer wall of the outer shell is provided with a heating sleeve.
[0021] This utility model has the following beneficial effects:
[0022] 1. In this utility model, when extruding plastic, the raw material is added from the top of the feed hopper and enters the outer shell. The power of the motor is transmitted to the rotating shaft through the reducer. The spiral blades fixedly connected to the outer wall of the rotating shaft adopt a variable diameter segmented type. The initial diameter of the spiral blades is relatively large, which facilitates the rapid conveying and initial compaction of the material. Subsequently, the diameter gradually decreases to compress and plasticize the material, ensuring that the material is extruded at a uniform flow rate. The heating jacket heats the raw material inside the outer shell. Finally, the material is extruded from the extrusion block and then cooled and shaped by the cooling and forming jacket to realize the processing and extrusion of plastic.
[0023] 2. In this utility model, when the material enters from the top of the feed hopper, it first passes through the inner wall of the mounting sleeve. The heating plate on the inner wall of the mounting sleeve heats the raw material for pre-drying. The second motor causes the rotating column to rotate through the transmission assembly. The inclined plate fixed on the outer wall of the rotating column also rotates. The inclined plate is inclined on the outer wall of the rotating column, which can cause the material to move naturally from the high point to the low point of the inclined plate due to gravity during the rotation of the inclined plate. The material flows down from the bottom gap, realizing the automatic conveying of the material. At the same time, the material rolls and moves continuously on the inclined plate, which prolongs the residence time of the material in the drying chamber, so that the raw material can be dried evenly. Attached Figure Description
[0024] Figure 1 This is a front perspective view of a plastic extruder with pre-drying function proposed in this utility model;
[0025] Figure 2 This is a partial structural exploded view of a pre-dried plastic extruder spiral blade according to the present invention.
[0026] Figure 3 This is a partial structural exploded view of an extrusion assembly for a plastic extruder with pre-drying technology proposed in this utility model;
[0027] Figure 4 This is a partial structural exploded view of a pre-drying mechanism for a plastic extruder with pre-drying capabilities proposed in this utility model;
[0028] Figure 5 This is a partial structural exploded view of a pre-drying heating mechanism for a plastic extruder proposed in this utility model.
[0029] Legend:
[0030] 1. Mounting block; 2. Extrusion mechanism; 201. Power assembly; 2011. Motor 1; 2012. Reducer; 202. Rotating shaft; 203. Housing; 204. Extrusion assembly; 2041. Extrusion block; 2042. Cooling and forming sleeve; 205. Spiral blade; 206. Base; 3. Pre-drying mechanism; 301. Feed hopper; 302. Motor 2; 303. Transmission assembly; 3031. Bevel gear 1; 3032. Bevel gear 2; 304. Rotating column; 305. Rotating assembly; 3051. Tilting plate; 3052. Guide bar; 306. Protective sleeve; 4. Heating mechanism; 401. Mounting sleeve; 402. Heating plate; 403. Positioning ring; 5. Control box; 6. Heating sleeve. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] Please see the appendix Figure 1 - Appendix Figure 3 An embodiment of this utility model is provided: a plastic extruder with pre-drying, including a mounting block 1, an extrusion mechanism 2 is provided on the top of the mounting block 1, the extrusion mechanism 2 is used to extrude plastic, a pre-drying mechanism 3 is provided on the top of the extrusion mechanism 2, the pre-drying mechanism 3 is used to feed material evenly, and a heating mechanism 4 is provided on the inner wall of the pre-drying mechanism 3.
[0033] The extrusion mechanism 2 includes a power assembly 201, which is located on the top of the mounting block 1. A rotating shaft 202 is provided at one end of the power assembly 201. A spiral blade 205 is fixedly connected to the outer wall of the rotating shaft 202. A housing 203 is provided on the outer side of the spiral blade 205. An extrusion assembly 204 is provided at one end of the housing 203. A base 206 is fixedly connected to the bottom of the housing 203.
[0034] Specifically, an extrusion mechanism 2 is installed on the top of the mounting block 1. The main function of the extrusion mechanism 2 is to extrude plastic materials to meet production needs. A pre-drying mechanism 3 is installed on the top of the extrusion mechanism 2. The main function of the pre-drying mechanism 3 is to ensure the uniformity of the feeding process, thereby improving the extrusion quality. A heating mechanism 4 is installed on the inner wall of the pre-drying mechanism 3 to ensure that the material reaches the appropriate temperature before extrusion. The extrusion mechanism 2 includes a power assembly 201. The power assembly 201 is installed on the top of the mounting block 1. One end of the power assembly 201 is designed with a rotating shaft 202. A spiral blade 205 is fixedly connected to the outer wall of the rotating shaft 202. The spiral blade 205 pushes the plastic material to move axially to achieve continuous extrusion. A shell 203 is set outside the spiral blade 205. One end of the shell 203 is designed with an extrusion assembly 204, which is responsible for shaping the extruded plastic material into the required shape. A base 206 is fixedly connected to the bottom of the shell 203 to ensure the stability and reliability of the entire extrusion mechanism 2. This ensures the high efficiency and precision of the extrusion process, thereby improving production efficiency and product quality.
[0035] Please see the appendix Figure 4 - Appendix Figure 5 The pre-drying mechanism 3 includes a feeding hopper 301, which is connected to the top of the outer shell 203. A second motor 302 is fixedly connected to the outer wall of the feeding hopper 301. The output end of the second motor 302 passes through the outer wall of the feeding hopper 301 and is provided with a transmission assembly 303. A rotating column 304 is provided at the top of the transmission assembly 303. Multiple rotating components 305 are provided on the outer wall of the rotating column 304. A protective sleeve 306 is provided at the bottom of the rotating column 304.
[0036] Specifically, the pre-drying mechanism 3 includes a feed hopper 301, which is connected to the top of the outer shell 203. A second motor 302 is fixedly connected to the outer wall of the feed hopper 301. The output end of the second motor 302 passes through the outer wall of the feed hopper 301 and is equipped with a transmission assembly 303. A rotating column 304 is provided at the top of the transmission assembly 303. Multiple rotating components 305 are evenly arranged on the outer wall of the rotating column 304. The rotating components 305 can help the material to be better mixed and dispersed during the pre-drying process. A protective sleeve 306 is provided at the bottom of the rotating column 304. The function of the protective sleeve 306 is to protect the rotating column 304 from external interference during operation and ensure stable operation.
[0037] Please see the appendix Figure 1 - Appendix Figure 3The power assembly 201 includes a motor 2011, which is fixed to the top surface of the mounting block 1. A reducer 2012 is provided at the output end of the motor 2011, and the other end of the reducer 2012 is fixedly connected to one end of the rotating shaft 202. The extrusion assembly 204 includes an extrusion block 2041, which is fixed to one end of the housing 203. A cooling forming sleeve 2042 is threadedly connected to one end of the outer wall of the housing 203. The transmission assembly 303 includes a bevel gear 3031, the middle of which is fixedly connected to the output end of the motor 302. The outer wall of the bevel gear 3031 is meshed with the bevel gear 3032.
[0038] Specifically, the power assembly 201 includes a motor 2011, which is fixed to the top surface of the mounting block 1. A reducer 2012 is installed at the output end of the motor 2011 to reduce the output speed and increase the output torque. The other end of the reducer 2012 is fixedly connected to one end of the rotating shaft 202. The extrusion assembly 204 includes an extrusion block 2041, which is fixed to one end of the housing 203 to ensure the stability and accuracy of the extrusion process. A cooling and forming sleeve 2042 is threaded to one end of the outer wall of the housing 203. The transmission assembly 303 includes a bevel gear 3031, the middle of which is fixedly connected to the output end of the motor 302 to ensure the stability and reliability of the transmission. The outer wall of the bevel gear 3031 is meshed with the bevel gear 3032, which can realize the effective transmission and distribution of power.
[0039] Please see the appendix Figure 3 - Appendix Figure 5 The rotating assembly 305 includes an inclined plate 3051, which is fixed to the outer wall of the rotating column 304. Multiple guide strips 3052 are fixedly connected to the top surface of the inclined plate 3051. The heating mechanism 4 includes a positioning ring 403, which is fixed to the inner wall of the feed hopper 301. An installation sleeve 401 is provided on the top of the positioning ring 403. A heating plate 402 is provided on the inner wall of the installation sleeve 401. A control box 5 is provided on the outer wall of the mounting block 1. A heating sleeve 6 is provided on the outer wall of the outer shell 203.
[0040] Specifically, the rotating assembly 305 includes an inclined disk 3051, which is fixed to the outer wall of the rotating column 304 to ensure stability and reliability. Multiple guide strips 3052 are fixedly connected to the top surface of the inclined disk 3051. The function of the guide strips 3052 is to guide the material to be evenly distributed during rotation, thereby improving the efficiency and performance of the entire system. The heating mechanism 4 includes a positioning ring 403, which is fixed to the inner wall of the feed hopper 301. A mounting sleeve 401 is provided on the top of the positioning ring 403. The mounting sleeve 401 provides a stable mounting platform for the heating plate 402. The heating plate 402 is located on the inner wall of the mounting sleeve 401 and is responsible for providing the necessary heat. A control box 5 is provided on the outer wall of the mounting block 1. The control box 5 integrates various control components for controlling the operation of the entire device. A heating sleeve 6 is provided on the outer wall of the outer shell 203. The heating sleeve 6 provides a heating layer for the entire device, further improving the heating efficiency.
[0041] Working principle: When extruding plastic, the raw material is added from the top of the feed hopper 301 and enters the outer shell 203. The power of the motor 2011 is transmitted to the rotating shaft 202 through the reducer 2012. The spiral blades 205 fixedly connected to the outer wall of the rotating shaft 202 adopt a variable diameter segmented type. The initial diameter of the spiral blades 205 is relatively large, which facilitates the rapid conveying and initial compaction of the material. Subsequently, the diameter gradually decreases to compress and plasticize the material, ensuring that the material is extruded at a uniform flow rate. The heating jacket 6 heats the raw material in the outer shell 203. Finally, the material is extruded from the extrusion block 2041 and then cooled and shaped by the cooling and forming jacket 2042 to realize the processing and extrusion of plastic.
[0042] When the material enters from the top of the feed hopper 301, it first passes through the inner wall of the mounting sleeve 401. The heating plate 402 on the inner wall of the mounting sleeve 401 heats the raw material for pre-drying. The motor 302 causes the rotating column 304 to rotate through the transmission assembly 303. The inclined plate 3051 fixed on the outer wall of the rotating column 304 also rotates. The inclined plate 3051 is inclined on the outer wall of the rotating column 304, which can cause the material to move naturally from the high point to the low point of the inclined plate 3051 due to gravity during the rotation of the inclined plate 3051. The material flows down from the bottom gap, realizing the automatic conveying of the material. At the same time, the material continuously rolls and moves on the inclined plate 3051, which prolongs the residence time of the material in the drying chamber, so that the raw material can be dried evenly.
[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A plastic extruder with pre-drying, comprising a mounting block (1), characterized in that: The top of the mounting block (1) is provided with an extrusion mechanism (2), which is used to extrude plastic. The top of the extrusion mechanism (2) is provided with a pre-drying mechanism (3), which is used to feed material evenly. The inner wall of the pre-drying mechanism (3) is provided with a heating mechanism (4). The extrusion mechanism (2) includes a power assembly (201), which is located on the top of the mounting block (1). One end of the power assembly (201) is provided with a rotating shaft (202). The outer wall of the rotating shaft (202) is fixedly connected with a spiral blade (205). The outer side of the spiral blade (205) is provided with a housing (203). One end of the housing (203) is provided with an extrusion assembly (204). The bottom of the housing (203) is fixedly connected with a base (206).
2. The plastic extruder with pre-drying according to claim 1, characterized in that: The pre-drying mechanism (3) includes a feeding hopper (301), which is connected to the top of the outer shell (203). A second motor (302) is fixedly connected to the outer wall of the feeding hopper (301). The output end of the second motor (302) passes through the outer wall of the feeding hopper (301) and is provided with a transmission assembly (303). A rotating column (304) is provided at the top of the transmission assembly (303). Multiple rotating components (305) are provided on the outer wall of the rotating column (304). A protective sleeve (306) is provided at the bottom of the rotating column (304).
3. A plastic extruder with pre-drying according to claim 1, characterized in that: The power assembly (201) includes a motor (2011), which is fixed on the top surface of the mounting block (1). A speed reducer (2012) is provided at the output end of the motor (2011), and the other end of the speed reducer (2012) is fixedly connected to one end of the rotating shaft (202).
4. A plastic extruder with pre-drying according to claim 1, characterized in that: The extrusion assembly (204) includes an extrusion block (2041) which is fixed to one end of the housing (203), and a cooling forming sleeve (2042) is threaded to one end of the outer wall of the housing (203).
5. A plastic extruder with pre-drying according to claim 2, characterized in that: The transmission assembly (303) includes a bevel gear one (3031), the middle part of which is fixedly connected to the output end of the motor two (302), and the outer wall of the bevel gear one (3031) is meshed with bevel gear two (3032).
6. A plastic extruder with pre-drying according to claim 2, characterized in that: The rotating assembly (305) includes a tilting disk (3051), which is fixed to the outer wall of the rotating column (304), and a plurality of guide strips (3052) are fixedly connected to the top surface of the tilting disk (3051).
7. A plastic extruder with pre-drying according to claim 2, characterized in that: The heating mechanism (4) includes a positioning ring (403), which is fixed to the inner wall of the feed hopper (301). The top of the positioning ring (403) is provided with an installation sleeve (401), and the inner wall of the installation sleeve (401) is provided with a heating plate (402).
8. A plastic extruder with pre-drying according to claim 1, characterized in that: The outer wall of the mounting block (1) is provided with a control box (5), and the outer wall of the outer shell (203) is provided with a heating sleeve (6).