Plastic web material stretching and preheating device

Abstract

This utility model relates to the field of plastic mesh stretching technology, specifically a plastic mesh stretching preheating device, including a preheating roller. Both ends of the preheating roller are equipped with a main body mechanism, and a support mechanism is fixed to the main body mechanism. A positioning block is installed on the support mechanism, and a blower mechanism is fixed to the positioning block. The blower mechanism includes a fixed block and a hydraulic rod. The top of the positioning block is fixedly mounted with the hydraulic rod, and the telescopic end of the hydraulic rod is fixedly connected to the fixed block. A rack is fixedly mounted on the fixed block, and a gear meshes with the rack. A connecting rod is fixedly mounted on the gear, and air ducts and air knives are fixedly connected to both ends of the connecting rod, respectively. When the hydraulic rod is activated, the rack drives the gear to rotate the connecting rod, which in turn drives the air knife and air duct to rotate. This allows the air knife to preheat both sides of the conveyed plastic mesh while simultaneously adjusting the blowing angle of the air knife.

Description

Technical Field

[0001] This utility model relates to a preheating device, specifically a preheating device for stretching plastic mesh, and belongs to the field of plastic mesh stretching technology. Background Technology

[0002] Plastic mesh stretching refers to the process of processing polymer sheets (such as polypropylene or high-density polyethylene) into a mesh material with a regular mesh structure through mechanical directional stretching. Preheating the plastic mesh allows the polymer molecular chains to obtain sufficient energy for movement, facilitating their orderly alignment along the direction of force during subsequent stretching and significantly improving the material's strength.

[0003] However, when the surface of the plastic mesh is heated by the preheating roller, the heat loss rate is higher than that in the middle area because the exposed area at both ends of the roller is larger and closer to metal parts such as bearings. This results in the temperature on both sides being lower than the process requirements. The mesh on the low-temperature side is not sufficiently softened, and the molecular chain orientation is insufficient during stretching, which easily leads to the edge thickness being significantly lower than that in the middle, thus hindering the improvement of the stretching effect of the mesh. Utility Model Content

[0004] The purpose of this invention is to provide a plastic mesh stretching and preheating device to solve the above problems. The hydraulic rod is activated, and the rack and pinion drive gear drives the connecting rod to rotate, which in turn drives the air knife and air pipe to rotate. This allows the air knife to preheat both sides of the conveyed plastic mesh while also adjusting the blowing angle of the air knife.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a plastic mesh stretching preheating device, comprising a preheating roller, with a main body mechanism installed at both ends of the preheating roller, a support mechanism fixed on the main body mechanism, a positioning block installed on the support mechanism, and a blower mechanism fixed on the positioning block. The blower mechanism includes a fixing block and a hydraulic rod, with the hydraulic rod fixedly installed at the top of the positioning block, and the fixing block fixedly connected to the telescopic end of the hydraulic rod. A rack is fixedly installed on the fixing block, a gear meshes on the rack, and a connecting rod is fixedly installed on the gear. Air ducts and air knives are fixedly connected to both ends of the connecting rod, respectively.

[0006] Preferably, the gear and connecting rod are rotatably connected to the positioning block, and the rack is slidably connected to the positioning block.

[0007] Preferably, the end of the air knife facing away from the connecting rod is arranged with an inclined structure, and the air duct is connected to the interior of the air knife through the connecting rod.

[0008] Preferably, the main structure includes a frame and mounting blocks. Frames are installed at both ends of the preheating roller. Mounting blocks are fixedly connected to the frame, and fixing rods are fixedly connected to the mounting blocks.

[0009] Preferably, the preheating roller is rotatably connected to the frame, and the mounting block is located on the side of the frame away from the preheating roller.

[0010] Preferably, the support mechanism includes a connecting plate and a vertical pole, with the connecting plate fixedly installed on the fixed pole and the vertical pole fixedly installed on the connecting plate.

[0011] Preferably, the connecting plate is located on the side wall of the fixed rod away from the preheating roller, and the upright is located at the center of the connecting plate.

[0012] Preferably, the part of the positioning block that contacts the upright has an arc-shaped structure, and the width of the bottom end of the upright is greater than the diameter of the top end of the upright.

[0013] The beneficial effects of this utility model are as follows: After the positioning block is fixed, the connecting rod can support the air knife, thereby making two adjacent air knives symmetrically arranged about the conveying plastic mesh belt. Hot air is delivered to the inside of the connecting rod through the air duct. Since the connecting rod and the air knife are fixedly connected, when the hot air blows onto the plastic mesh belt through the air knife, both sides of the plastic mesh belt can be preheated, which helps to solve the problem of uneven heating temperature on both sides of the plastic mesh belt caused by rapid heat dissipation at both ends of the preheating roller. When it is necessary to adjust the angle of the air knife, the hydraulic rod can be activated. Its telescopic end drives the fixed block to slide, thereby causing the rack to drive the gear meshing with it to rotate during the sliding process. The gear is fixed together with the connecting rod. When the connecting rod rotates along the inner wall of the positioning block, it can drive the air knife to rotate, thus facilitating the adjustment of the installation angle of the air knife. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure between the frame and the preheating roller of this utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure between the upright and the positioning block of this utility model;

[0017] Figure 4 for Figure 3 The diagram shown is an enlarged view of the structure of part A.

[0018] Figure 5 This is a schematic diagram of the connection structure between the positioning block and the air duct of this utility model;

[0019] Figure 6 This is a schematic diagram of the connection structure between the fixing block and the hydraulic rod of this utility model.

[0020] In the diagram: 1. Main structure; 101. Frame; 102. Mounting block; 103. Fixing rod; 2. Preheating roller; 3. Support mechanism; 301. Connecting plate; 302. Upright pole; 4. Positioning block; 5. Air blowing mechanism; 501. Air duct; 502. Air knife; 503. Fixing block; 504. Rack; 505. Gear; 506. Connecting rod; 507. Hydraulic rod. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-6 As shown, the plastic mesh stretching preheating device includes a preheating roller 2. A main body mechanism 1 is installed at both ends of the preheating roller 2. A support mechanism 3 is fixed on the main body mechanism 1. A positioning block 4 is installed on the support mechanism 3. A blower mechanism 5 is fixed on the positioning block 4. The blower mechanism 5 includes a fixing block 503 and a hydraulic rod 507. The hydraulic rod 507 is fixedly installed at the top of the positioning block 4. The telescopic end of the hydraulic rod 507 is fixedly connected to the fixing block 503. A rack 504 is fixedly installed on the fixing block 503. The rack 504 is slidably connected to the positioning block 4. A gear 505 meshes with the rack 504. A connecting rod 506 is fixedly installed on the gear 505. The telescopic end of the hydraulic rod 507 drives the fixing block 503. 3. Sliding causes the rack 504 to drive the gear 505 to rotate during the sliding process. When the connecting rod 506 rotates along the inner wall of the positioning block 4, it can drive the air knife 502 to rotate, which facilitates the adjustment of the installation angle of the air knife 502. The gear 505 and the connecting rod 506 are rotatably connected to the positioning block 4. The two ends of the connecting rod 506 are respectively fixedly connected to the air duct 501 and the air knife 502. The end of the air knife 502 facing away from the connecting rod 506 is set with an inclined structure, and the air duct 501 is connected to the interior of the air knife 502 through the connecting rod 506. When hot air is blown onto the plastic mesh belt through the air knife 502, it can preheat both sides of the plastic mesh belt, which helps to solve the problem of uneven heating temperature on both sides of the plastic mesh belt caused by rapid heat dissipation at both ends of the preheating roller 2.

[0023] As a technical optimization of this utility model, the main structure 1 includes a frame 101 and a mounting block 102. The preheating roller 2 is mounted on both ends of the frame 101. The preheating roller 2 is rotatably connected to the frame 101. The mounting block 102 is fixedly connected to the frame 101. The mounting block 103 is fixedly connected to the mounting block 102. By fixing the mounting block 102 to the side wall of the frame 101 away from the preheating roller 2, the fixing rod 103 can support the connecting plate 301, and the positioning block 4 can be installed on the side wall of the upright 302.

[0024] As a technical optimization of this utility model, the support mechanism 3 includes a connecting plate 301 and a vertical rod 302. The connecting plate 301 is fixedly installed on the fixed rod 103. The connecting plate 301 is located on the side wall of the fixed rod 103 away from the preheating roller 2. The vertical rod 302 is fixedly installed on the connecting plate 301. Since the vertical rod 302 is relatively long, the operator can adjust the distance between two adjacent positioning blocks 4 according to the thickness of the plastic mesh. The vertical rod 302 is located at the center of the connecting plate 301. The part of the positioning block 4 that contacts the vertical rod 302 is set with an arc surface structure. The width of the bottom end of the vertical rod 302 is greater than the diameter of the top end of the vertical rod 302, thereby preventing the positioning block 4 from falling off the vertical rod 302.

[0025] In use, the operator first fixes the mounting block 102 to the side wall of the frame 101 away from the preheating roller 2. The fixing rod 103 installed on the mounting block 102 supports the connecting plate 301. Then, the positioning block 4 can be installed on the side wall of the upright 302 fixed on the connecting plate 301. Since the upright 302 is relatively long, the operator can adjust the distance between two adjacent positioning blocks 4 according to the thickness of the plastic mesh. After the positioning blocks 4 are fixed, the connecting rod 506 can support the air knife 502, so that two adjacent air knives 502 are symmetrically arranged with respect to the conveying plastic mesh belt. Hot air is delivered to the inside of the connecting rod 506 through the air duct 501. Since the connecting rod 506 and the air knife 502 are fixedly connected, the hot air passes through the air knife 502. When the air blows onto the plastic mesh belt, it can preheat both sides of the plastic mesh belt, which helps to solve the problem of uneven heating temperature on both sides of the plastic mesh belt caused by rapid heat dissipation at both ends of the preheating roller 2. When it is necessary to adjust the angle of the air knife 502, the hydraulic rod 507 can be activated. Its telescopic end drives the fixed block 503 to slide, which in turn drives the rack 504 to drive the gear 505 meshing with it to rotate during the sliding process. The gear 505 is fixed together with the connecting rod 506. When the connecting rod 506 rotates along the inner wall of the positioning block 4, it can drive the air knife 502 to rotate, which makes it easier to adjust the installation angle of the air knife 502. The plastic mesh material heated by hot air on both sides is conveyed to the part between the two preheating rollers 2. When the outer surface of the preheating roller 2 contacts the two sides of the plastic mesh material, the mesh material can be preheated.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for stretching and preheating plastic web material, comprising a preheating cylinder (2), characterized in that: The preheating roller (2) is equipped with a main body mechanism (1) at both ends. A support mechanism (3) is fixed on the main body mechanism (1). A positioning block (4) is installed on the support mechanism (3). A blower mechanism (5) is fixed on the positioning block (4). The blower mechanism (5) includes a fixing block (503) and a hydraulic rod (507). A hydraulic rod (507) is fixedly installed at the top of the positioning block (4). A fixing block (503) is fixedly connected to the telescopic end of the hydraulic rod (507). A rack (504) is fixedly installed on the fixing block (503). A gear (505) meshes on the rack (504). A connecting rod (506) is fixedly installed on the gear (505). A duct (501) and an air knife (502) are fixedly connected to both ends of the connecting rod (506).

2. The plastic web material stretch preheating apparatus of claim 1, wherein: The gear (505) and connecting rod (506) are rotatably connected to the positioning block (4), and the rack (504) is slidably connected to the positioning block (4).

3. The plastic mesh stretching and preheating device according to claim 1, characterized in that: The air knife (502) is set with an inclined structure at the end away from the connecting rod (506), and the air duct (501) is connected to the interior of the air knife (502) through the connecting rod (506).

4. The plastic mesh stretching and preheating device according to claim 1, characterized in that: The main structure (1) includes a frame (101) and a mounting block (102). The preheating roller (2) is equipped with a frame (101) at both ends. The mounting block (102) is fixedly connected to the frame (101), and a fixing rod (103) is fixedly connected to the mounting block (102).

5. The plastic mesh stretching and preheating device according to claim 4, characterized in that: The preheating roller (2) is rotatably connected to the frame (101), and the mounting block (102) is located on the side of the frame (101) away from the preheating roller (2).

6. The plastic mesh stretching and preheating device according to claim 4, characterized in that: The support mechanism (3) includes a connecting plate (301) and a vertical pole (302). The connecting plate (301) is fixedly installed on the fixed pole (103), and the vertical pole (302) is fixedly installed on the connecting plate (301).

7. The plastic mesh stretching and preheating device according to claim 6, characterized in that: The connecting plate (301) is located on the side wall of the fixed rod (103) away from the preheating roller (2), and the upright rod (302) is located at the center of the connecting plate (301).

8. The plastic mesh stretching and preheating device according to claim 6, characterized in that: The part of the positioning block (4) that contacts the upright (302) is set with an arc surface structure, and the width of the bottom end of the upright (302) is greater than the diameter of the top end of the upright (302).

Images