PP (polypropylene) plastic sheet calendering equipment

Abstract

The utility model relates to the technical field of plastic sheet production, in particular to a pp plastic sheet calendering device, which comprises an upper press roll and a lower press roll which are arranged in a matching way, the side edges of the upper press roll and the lower press roll are provided with a pretreatment mechanism in a matching way, the pretreatment mechanism comprises two roller groups, and the roller groups move in opposite directions when in use. According to the equipment, the pretreatment mechanism is used for achieving primary treatment on the sheet, that is, in the using process, after the sheet is extruded through the pretreatment mechanism, redundant materials on the sheet are extruded together, then the materials extruded together are treated, and then the materials are extruded again through the upper pressing roller and the lower pressing roller; and in the process, the two roller sets moving in the opposite directions are utilized, redundant materials are extruded together through the roller sets, and the redundant materials extruded together can be conveniently treated in a centralized mode.

Description

Technical Field

[0001] This utility model relates to the field of plastic sheet production technology, specifically to a PP plastic sheet calendering equipment. Background Technology

[0002] During the production of PP plastic sheets, calendering is required. Calendering is an important process involving thermoplastic processing. When calendering plastic sheets, the material needs to be fed into a calender consisting of multiple rollers. Between these rollers, the material is squeezed and stretched, eventually forming a continuous sheet with a specific thickness and width. In this step, temperature, speed, and pressure need to be precisely controlled to ensure the uniformity of the sheet quality.

[0003] The patent application with application number 202221938851.7 discloses a high-efficiency and energy-saving PP sheet extrusion production line, specifically disclosing that the sheet is flattened by using upper and lower pressure rollers. Since the sheet has a certain degree of extensibility in this process, the extrusion direction of the sheet cannot be restricted. Therefore, the extrusion of the sheet not only extends towards the edge of the sheet, but also extrudes towards the sheet body, causing bulges to form on the sheet body. Direct extrusion will result in uneven extrusion of the sheet, requiring multiple extrusions to eliminate the effects of the bulges, resulting in low sheet production efficiency. Utility Model Content

[0004] The technical problem solved by this utility model is to address the issue that, in the prior art, directly extruding the sheet will cause bulges on the sheet body, resulting in uneven extrusion.

[0005] This utility model can be achieved through the following technical solution: a PP plastic sheet calendering equipment, including an upper pressure roller and a lower pressure roller arranged in cooperation, and a pre-treatment mechanism arranged on the side of the upper pressure roller and the lower pressure roller. The pre-treatment mechanism includes roller groups, and two roller groups are arranged, and the roller groups move in opposite directions during use.

[0006] A further technical improvement of this utility model is that the roller assembly includes a first adjusting roller and a second adjusting roller, which are arranged longitudinally.

[0007] A further technical improvement of this utility model is that: the first adjusting roller is rotatably mounted on the mounting inner core, the mounting inner core is fixedly mounted on the sliding seat, the sliding seat is slidably mounted on the limiting post, the limiting post is installed inside the sliding mounting plate, and an intermediate base is fixed inside the sliding mounting plate, and a tension spring is provided between the intermediate base and the sliding seat.

[0008] A further technical improvement of this utility model is that: the sliding mounting plate is threaded onto the internal bidirectional screw, the sliding mounting plate and the connecting plate are slidably connected, and the internal bidirectional screw is rotatably mounted inside the connecting plate.

[0009] A further technical improvement of this utility model is that: a side plate is fixed to the side of the connecting plate, and a first telescopic rod and a second telescopic rod are symmetrically fixed to the side plate. The first telescopic rod and the second telescopic rod are symmetrically arranged, and a first clamping plate is fixed to the end of the first telescopic rod, and a second clamping plate is fixed to the end of the second telescopic rod. The first clamping plate and the second clamping plate are symmetrically arranged.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. This application achieves preliminary processing of the sheet material by utilizing a pre-processing mechanism. That is, during use, the pre-processing mechanism extrudes the sheet material to compress excess material together. The extruded material is then processed, and then extruded again by upper and lower pressure rollers to achieve fine processing of the material. In this process, two opposing roller groups are used to compress excess material together, which facilitates centralized processing of the extruded excess material.

[0012] 2. This application utilizes a first clamping plate fixed to the end of a first telescopic rod and a second clamping plate fixed to the end of a second telescopic rod. The first clamping plate and the second clamping plate are symmetrically arranged, so that the working area of ​​the plastic sheet can be divided by the first clamping plate and the second clamping plate, reducing the impact of its extensibility on the thickness of the sheet in non-pre-treated positions, thereby ensuring the calendering quality of the sheet. Attached Figure Description

[0013] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram showing the position of the roller assembly of this utility model;

[0015] Figure 2 This is a schematic diagram showing the position of the sliding mounting plate of this utility model;

[0016] Figure 3 This is a schematic diagram showing the position of the tension spring in this utility model.

[0017] In the diagram: 1. Side plate; 2. First clamping plate; 3. First telescopic rod; 4. Connecting plate; 5. First adjusting roller; 6. Second adjusting roller; 7. Adjusting bracket; 8. Internal bidirectional screw; 9. Second telescopic rod; 10. Second clamping plate; 11. Sliding mounting plate; 12. Limiting post; 13. Sliding seat; 14. Tension spring; 15. Intermediate base; 16. Mounting core; 17. Rotating shaft. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] Please see Figure 1-3 As shown, a PP plastic sheet calendering equipment includes a side plate 1, which is fixedly installed on the frame. A connecting plate 4 is fixedly installed on the side of the side plate 1, and the two ends of the connecting plate 4 are respectively provided with side plates 1. Under the action of the connecting plate 4 and the side plates 1, a parallel support frame is formed to form a preliminary rolling of the sheet, so that the sheet is set more evenly, thereby facilitating its further precise processing.

[0020] Specifically, the side plate 1 is equipped with a clamping mechanism for pressing and fixing the sheet. Two sets of clamping mechanisms are used to fix the sheet at a certain position. Then, the roller pressing mechanism set between the clamping mechanisms is used to perform preliminary extrusion on the sheet, crushing and gathering some bulges on the sheet. These gathered bulges are then processed separately to ensure the initial quality of the sheet. After processing, the clamping mechanism is opened, and the sheet is transferred between the upper and lower pressure rollers for precise calendering.

[0021] Specifically, the clamping mechanism includes a first clamping plate 2 and a second clamping plate 10. The first clamping plate 2 is fixedly installed at the output end of the first telescopic rod 3, and the second clamping plate 10 is fixedly installed at the output end of the second telescopic rod 9. The first telescopic rod 3 and the second telescopic rod 9 are respectively fixedly installed on the side plate 1, and the output ends of the first telescopic rod 3 and the second telescopic rod 9 are symmetrically arranged. That is, in use, the first clamping plate 2 and the second clamping plate 10 are activated by the cooperation of the first telescopic rod 3 and the second telescopic rod 9, so that the first clamping plate 2 and the second clamping plate 10 can move towards each other, thereby clamping and fixing a certain position of the sheet, realizing the cutting, clamping and fixing of a certain area of ​​the sheet.

[0022] As a further embodiment of this application, the rolling mechanism includes a first adjusting roller 5 and a second adjusting roller 6, wherein the first adjusting roller 5 and the second adjusting roller 6 are always under opposing pressure to achieve the extrusion function of the sheet. At the same time, the first adjusting roller 6 and the second adjusting roller 5 are set at the output end of the moving component. The moving component is used to move the first adjusting roller 5 and the second adjusting roller 6, thereby moving the sheet with bulges. In this process, by using the opposing movement of the two sets of first adjusting roller 5 and second adjusting roller 6, the positions of the bulges on the sheet are moved in opposite directions to achieve the polymerization function of the bulges. After polymerization, the bulges are individually transversely cut by a cross-cutting device to ensure the uniformity of the distribution of the plastic sheet.

[0023] The first adjusting roller 5 and the second adjusting roller 6 are respectively fixedly mounted on the mounting core 16, wherein the mounting core 16 is rotatably mounted on the rotating shaft 17, and the rotating shaft 17 is fixed on the sliding seat 13. The sliding seat 13 is slidably connected to the limiting post 12, and the limiting post 12 is fixedly mounted inside the sliding mounting plate 11. An intermediate base 15 is fixed on the limiting post 12, and a tension spring 14 is installed between the intermediate base 15 and the sliding seat 13. In use, under the action of the tension spring 14, the two sliding seats 13 move towards each other, so that the first adjusting roller 5 and the second adjusting roller 6 are always subjected to opposite tension, thereby squeezing the sheet material between the first adjusting roller 5 and the second adjusting roller 6. At the same time, under the action of the movement of the sliding mounting plate 11, the bulge is squeezed and gathered.

[0024] In order to enable the sliding mounting plate 11 to move, the sliding mounting plate 11 is threadedly connected to the internal bidirectional screw 8. The sliding mounting plate 11 is slidably connected to the adjusting bracket 7, which is fixedly connected to the connecting plate 4. The internal bidirectional screw 8 is driven by an internal motor, thereby driving the sliding mounting plate 11. During use, the sliding mounting plate 11 can move towards each other to compress the bulge.

[0025] In use, the sheet passes through the clamping mechanism, the rolling mechanism and the clamping mechanism. The rolling mechanism is used to perform preliminary processing on the sheet. Then, it is processed again by the upper and lower pressure rollers to obtain a high-quality plastic sheet.

[0026] In the above process, when a bulge appears on the sheet, the first telescopic rod 3 and the second telescopic rod 9 are activated in coordination, causing the first clamping plate 2 and the second clamping plate 10 to move towards each other, thereby clamping and fixing a certain position of the sheet, and cutting and clamping a certain area of ​​the sheet. Then, the internal bidirectional screw 8 is driven by the internal motor, thereby driving the sliding mounting plate 11. When in use, the sliding mounting plate 11 can move towards each other to squeeze the bulge.

[0027] During this process, under the action of the tension spring 14, the two sliding seats 13 move towards each other, so that the first adjusting roller 5 and the second adjusting roller 6 are always subjected to opposite tension, thereby enabling the sheet material between the first adjusting roller 5 and the second adjusting roller 6 to be squeezed.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A PP plastic sheet calendering device, comprising an upper pressure roller and a lower pressure roller arranged in a mating manner, characterized in that: The upper and lower pressure rollers are equipped with a pre-treatment mechanism on their sides. The pre-treatment mechanism includes a roller group, and there are two roller groups. The roller groups move in opposite directions during use. The roller assembly includes a first adjusting roller (5) and a second adjusting roller (6), which are arranged longitudinally. The first adjusting roller (5) is rotatably mounted on the mounting inner core (16), the mounting inner core (16) is fixedly mounted on the sliding seat (13), the sliding seat (13) is slidably mounted on the limiting post (12), the limiting post (12) is mounted inside the sliding mounting plate (11), and an intermediate base (15) is fixed inside the sliding mounting plate (11), and a tension spring (14) is provided between the intermediate base (15) and the sliding seat (13).

2. The PP plastic sheet calendering equipment according to claim 1, characterized in that, The sliding mounting plate (11) is threaded onto the internal bidirectional screw (8), the sliding mounting plate (11) and the connecting plate (4) are slidably connected, and the internal bidirectional screw (8) is rotatably mounted inside the connecting plate (4).

3. The PP plastic sheet calendering equipment according to claim 2, characterized in that, The side plate (1) is fixed to the side of the connecting plate (4). A first telescopic rod (3) and a second telescopic rod (9) are symmetrically fixed on the side plate (1). The first telescopic rod (3) and the second telescopic rod (9) are symmetrically arranged. A first clamping plate (2) is fixed to the end of the first telescopic rod (3), and a second clamping plate (10) is fixed to the end of the second telescopic rod (9). The first clamping plate (2) and the second clamping plate (10) are symmetrically arranged.

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