一种用于PVC管材挤出机的双排气螺杆组

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By installing a cleaning mechanism that links scrapers and rotating blocks on the protective mesh plate and a two-stage stepped exhaust design, the problem of clogging of the protective mesh plate is solved, exhaust efficiency and pipe quality are improved, and the maintenance process is simplified.

CN224510371UActive Publication Date: 2026-07-17ZHEJIANG JINXING INJECTION SCREWS MFR

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: ZHEJIANG JINXING INJECTION SCREWS MFR
Filing Date: 2025-08-05
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

In existing PVC pipe extruders, the protective mesh plate is easily clogged, leading to a decrease in exhaust efficiency, and the traditional screw design limits the processing quality of plastic particles.

Method used

A cleaning mechanism with a scraper and a rotating block linked on both sides of the protective mesh is set up. The rotating rod driven by the motor moves the protrusion along the slide groove to achieve automatic cleaning of the protective mesh. A dual-stage stepped exhaust design is adopted to release gas at different plasticizing stages. The modular bolt connection structure facilitates disassembly and maintenance.

Benefits of technology

It enables automatic cleaning of the protective mesh panels, ensures unobstructed exhaust channels, improves exhaust efficiency and pipe forming quality, simplifies the maintenance process, and reduces equipment downtime.

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Abstract

本实用新型涉及螺杆技术领域，具体是涉及一种用于PVC管材挤出机的双排气螺杆组，包括螺杆主体和螺杆套筒，第一杆体和第二杆体之间设有第一研磨块，第二杆体和第二杆体之间设有第二研磨块，螺杆套筒套设于螺杆主体上，螺杆套筒上开设有入料斗、第一排气口和第二排气口，第一排气口和第二排气口上安装有防护网板，防护网板两侧开设有移动槽，移动槽内滑动连接有刮板，刮板的顶部开设有滑槽，防护网板顶部安装有排气管道，排气管道内设有安装板，安装板中心位置开设有通孔，通孔中转动连接有转动杆，转动杆底部连接有转动块，转动块远离转动杆的一端设有凸块，凸块插设于滑槽中。本申请有效延长了防护网板的更换周期。

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Claims

1. A twin vented screw set for PVC pipe extruders comprising a screw body (1) and a screw sleeve (2), characterized in that, The screw body (1) includes a first rod (3), a second rod (4), and a third rod (5). A first grinding block (6) is provided between the first rod (3) and the second rod (4), and a second grinding block (7) is provided between the second rod (4) and the third rod (5). The screw sleeve (2) is fitted onto the screw body (1). The screw sleeve (2) has a feed hopper (8), a first exhaust port (9), and a second exhaust port (10). Protective mesh plates (11) are installed on the first exhaust port (9) and the second exhaust port (10). The protective mesh plates (11) are positioned on both sides of the first exhaust port (9) and the second exhaust port (10). A movable groove (12) is provided on the side, and a scraper (13) is slidably connected in the movable groove (12). A sliding groove (14) is provided on the top of the scraper (13). An exhaust pipe (15) is installed on the top of the protective mesh plate (11). An installation plate (16) is provided in the exhaust pipe (15). A through hole is provided in the center of the installation plate (16). A rotating rod (17) is rotatably connected in the through hole. A rotating block (18) is connected to the bottom of the rotating rod (17). A protrusion (19) is provided at the end of the rotating block (18) away from the rotating rod (17). The protrusion (19) is inserted into the sliding groove (14).

2. A twin vented screw set for a PVC pipe extruder as claimed in claim 1, wherein, The exhaust pipe (15) is equipped with a first motor (20), the output shaft of the first motor (20) is connected to a first rotating roller (21), and the top end of the rotating rod (17) is connected to a second rotating roller (22). The first rotating roller (21) drives the second rotating roller (22) to rotate through a synchronous belt.

3. A twin vented screw set for a PVC pipe extruder as claimed in claim 1, wherein, A circular connector (23) is fixedly installed on the exhaust pipe (15).

4. A twin vented screw set for a PVC pipe extruder as claimed in claim 1, wherein, The first rod (3), the second rod (4) and the third rod (5) are all frustum structures with trapezoidal axial cross sections.

5. A twin vented screw set for a PVC pipe extruder as claimed in claim 1, wherein, The first exhaust port (9) is located above the first grinding block (6), and the second exhaust port (10) is located above the second grinding block (7).

6. A twin vented screw set for a PVC pipe extruder as claimed in claim 1, wherein, Two sets of screw bodies (1) are symmetrically arranged inside the screw sleeve (2). The bottom of the screw body (1) located on the left side inside the screw sleeve (2) is connected to a drive shaft (24), and a first gear (25) is fixedly connected to the drive shaft (24). The driven shaft (26) located on the right side inside the screw sleeve (2) is connected to a driven shaft (26), and a second gear (27) that meshes with the first gear (25) is fixedly connected to the driven shaft (26).

7. A twin vented screw set for a PVC pipe extruder as claimed in claim 6, wherein, A second motor (28) is installed outside the screw sleeve (2). The output shaft of the second motor (28) is connected to a first drive gear (29). A connecting shaft (30) is installed at the end of the first gear (25) away from the drive shaft (24). A second drive gear (31) that meshes with the first drive gear (29) is installed at the end of the connecting shaft (30) away from the first gear (25).

8. A twin vented screw set for a PVC pipe extruder as claimed in claim 1, wherein, The protective mesh plate (11) and the exhaust pipe (15) are bolted to the screw sleeve (2).