Stretching device for polypropylene film production
By designing a stretching device for the production of polypropylene films including electric push rod-driven pressing blocks and stretching rollers, combined with the heating components, the problem of difficult to ensure the synchronization rate of existing equipment is solved, and the uniform pulling of polypropylene films is achieved Easily extend and operate.
Patent Information
- Application Number
- CN202420760720.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-14
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-14
AI Technical Summary
The existing polypropylene film stretching equipment has high cost and the synchronization rate is difficult to ensure after the number of use increases, resulting in uneven film thickness and poor use effect.
A stretching device for production of polypropylene films including mounting housing, connecting plate, stretching roller and pressing limiting member is designed. The vertical movement of the pressing block and stretching roller is driven by an electric push rod, and combined with the heating assembly to make the The film is softened for easy stretching operation.
It realizes the production of polypropylene films with convenient operation and good stretching effect, solves the problem of uneven film thickness and improves the use effect of the equipment.
Smart Images
Figure CN222223451U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of plastic film processing, and in particular relates to a stretching device for polypropylene film production. Background Art
[0002] Polypropylene film is a film made by first passing the melt of high molecular weight polypropylene through a narrow and long die to form a sheet or thick film, then in a stretching machine, at a certain temperature and a set speed, simultaneously or stepwise stretching in two vertical directions (longitudinal and transverse), and finally after appropriate cooling, heat treatment or special processing (such as corona, coating, etc.), it has good optical properties (such as transparency and gloss), mechanical properties (such as tensile strength and toughness) and waterproof properties, so it is widely used in various fields; in the process of stretching the polypropylene film, the existing stretching equipment mostly uses two cylinders to drive the left and right clamping mechanisms to move in the direction of separation, so as to stretch the film. In the specific operation process, this method has the following disadvantages: 1. The synchronization device used by the two cylinders is expensive; 2. As the number of uses increases and the use time becomes longer, the synchronization rate of the two cylinders cannot be guaranteed, resulting in uneven thickness of the stretched film and poor use effect; Therefore, in order to solve the above problems, it is necessary to develop a stretching device for the production of polypropylene film that is easy to operate and has good stretching effect. Utility Model Content
[0003] The utility model aims to overcome the shortcomings of the prior art and provide a stretching device for producing polypropylene films which is convenient to operate and has good stretching effect.
[0004] The purpose of the utility model is achieved as follows: a stretching device for polypropylene film production, comprising a mounting shell, a connecting plate, a stretching roller and a pressure limiter, the mounting shell as a whole is a square structure with a hollow interior, a feed port is longitudinally arranged at the center of its left end face, a discharge port is longitudinally arranged at the center of its right end face, and a heating component is arranged on the inner top surface and the inner bottom surface along its length direction; a fixing plate is transversely arranged at the middle of the front end face and the rear end face of the mounting shell, and a plurality of adjusting slots are staggered above and below the connection between the fixing plate and the mounting shell, the adjusting slots are vertically arranged as a whole, and a square adjusting block is longitudinally penetrated inside each adjusting slot, the adjusting block is vertically slidably connected to the adjusting slot, and a connecting shaft is longitudinally rotated through the center of the adjusting block, and the connecting plate has Two, respectively arranged in parallel at the upper end and the lower end of the fixed plate, wherein the connecting plate located at the upper end of the fixed plate is fixedly connected to the adjusting block in the upper adjusting slot, the connecting plate located at the lower end of the fixed plate is fixedly connected to the adjusting block in the lower adjusting slot, and a plurality of electric push rods a are vertically fixedly arranged between the fixed plate and the connecting plate; there are a plurality of stretching rollers, all of which are located inside the mounting shell, and are longitudinally and concentrically fixedly arranged between the corresponding two connecting shafts in sequence; there are two groups of pressure limiters, respectively located outside the feed port and the discharge port, which include a supporting block, a pressure block and a fixed mounting block, the supporting block and the fixed mounting block are both fixedly connected to the mounting shell, the pressure block is located between the supporting block and the fixed mounting block, and an electric push rod b is vertically fixedly arranged between the pressure block and the fixed mounting block.
[0005] The supporting block and the pressurizing block are both of right-angled trapezoidal structure, and the pressing surfaces thereof are inclined surfaces.
[0006] The middle parts of the inner walls on both sides of the adjusting slot are vertically provided with sliding grooves, and sliding blocks matching with the sliding groove structure are fixedly provided on both sides of the adjusting block.
[0007] Both sides of the front end surface and the rear end surface of the installation shell are vertically provided with scales.
[0008] Conical calibration blocks are fixedly arranged at both ends of the connecting plate.
[0009] The beneficial effects of the utility model are as follows: the utility model provides a support block, a pressure block, a fixed installation block and an electric push rod b, and utilizes the telescopicity of the electric push rod b to drive the pressure block to move in the vertical direction, and then through the movement of the pressure block and the setting of the support block, the pressure limit of the two ends of the polypropylene film to be stretched can be respectively realized through two groups of pressure limiters; by providing a heating component, the polypropylene film can be heated by it to soften the polypropylene film, so as to facilitate the subsequent stretching operation of the polypropylene film; by providing a fixed plate, an adjustment slot, an adjustment block, a connecting shaft, a connecting plate and an electric push rod a, by utilizing the sliding connection between the adjustment block and the adjustment slot, and the fixed connection between the connecting plate and the adjustment block, the expansion length of the electric push rod a can be controlled, so as to drive the connecting plate to move in the vertical direction, and then by utilizing the movement of the connecting plate, the connecting shaft and the stretching roller concentrically fixedly connected to the connecting shaft can be driven to move in the vertical direction through the adjustment block, so that, as the stretching roller moves vertically, the polypropylene film wrapped around the outside can be stretched transversely; in general, the utility model has the advantages of convenient operation and good stretching effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a front view of the utility model.
[0011] Figure 2 It is a sectional view of the front view of the utility model.
[0012] In the figure: 1. Installation shell; 11. Feed inlet; 12. Discharge outlet; 13. Heating component; 14. Fixed plate; 15. Adjustment slot; 16. Adjustment block; 17. Connecting shaft; 2. Connecting plate; 21. Electric push rod a; 22. Conical calibration block; 3. Stretching roller; 4. Pressurization limiter; 41. Support block; 42. Pressurization block; 43. Fixed mounting block; 44. Electric push rod b. DETAILED DESCRIPTION
[0013] The utility model is further described below in conjunction with the accompanying drawings.
[0014] Example: Figure 1 , Figure 2As shown, a stretching device for polypropylene film production comprises a mounting shell 1, a connecting plate 2, a stretching roller 3 and a pressure-applying limiter 4. The mounting shell 1 is a square structure with a hollow interior as a whole. A feed port 11 is longitudinally arranged at the center of its left end face, a discharge port 12 is longitudinally arranged at the center of its right end face, and a heating assembly 13 is arranged on the inner top surface and the inner bottom surface along its length direction; a fixing plate 14 is transversely arranged in the middle of the front end face and the rear end face of the mounting shell 1, and a plurality of adjusting slots 15 are staggered above and below the connection between the fixing plate 14 and the mounting shell 1, the adjusting slots 15 are vertically arranged as a whole, and a square adjusting block 16 is longitudinally penetrated inside each adjusting slot 15, the adjusting block 16 is vertically slidably connected to the adjusting slot 15, and a connecting shaft 17 is longitudinally rotatably penetrated at the center of the adjusting block 16, and there are two connecting plates 2, which are respectively arranged in parallel with the fixing plate 14. The upper and lower ends of the fixed plate 14, wherein the connecting plate 2 located at the upper end of the fixed plate 14 is fixedly connected to the adjusting block 16 in the upper adjusting slot 15, the connecting plate 2 located at the lower end of the fixed plate 14 is fixedly connected to the adjusting block 16 in the lower adjusting slot 15, and a plurality of electric push rods a21 are vertically fixedly arranged between the fixed plate 14 and the connecting plate 2; there are a plurality of stretching rollers 3, all of which are located inside the mounting shell 1, and are longitudinally and concentrically fixedly arranged between the corresponding two connecting shafts 17 in sequence; there are two groups of pressure limiters 4, which are respectively located on the outside of the feed port 11 and the discharge port 12, and include a support block 41, a pressure block 42 and a fixed mounting block 43, the support block 41 and the fixed mounting block 43 are both fixedly connected to the mounting shell 1, the pressure block 42 is located between the support block 41 and the fixed mounting block 43, and an electric push rod b44 is vertically fixedly arranged between the pressure block 42 and the fixed mounting block 43.
[0015] The support block 41 and the pressure block 42 are both of right-angled trapezoidal structure, and their crimping surfaces are inclined surfaces; the middle parts of the inner walls on both sides of the adjustment slot 15 are vertically provided with slide grooves, and the two sides of the adjustment block 16 are fixed with sliders that match the slide groove structure; the front end face and the rear end face of the mounting shell 1 are vertically provided with scales on both sides; the two ends of the connecting plate 2 are fixedly provided with conical calibration blocks 22, and the cooperation of the scale and the conical calibration block 22 can facilitate the precise observation of the vertical movement distance of the connecting plate 2 under the action of the electric push rod a21.
[0016] When the utility model is in use, first, the polypropylene film to be stretched is driven by the driving device, so that it passes through the inside of the installation shell 1 and is wound around the outer ends of multiple stretching rollers 3 in sequence, and then, the electric push rod b44 is controlled to unfold, and the thrust of the pressure block 42 when the electric push rod b44 is unfolded can drive the pressure block 42 to move in the vertical direction, so that the pressure block 42 and the support block 41 are in close contact. At this time, the pressure block 42 and the support block 41 are in close contact, so that the polypropylene film located therebetween can be pressurized and limited, and then the two groups of pressure limiting members 4 are cooperated to complete the limitation of the polypropylene film passing through the installation shell 1; then, the heating component 13 is controlled to be turned on, and the heating component 13 can be used to heat the polypropylene film inside the installation shell 1 to soften the polypropylene film. , so as to facilitate the subsequent stretching operation of the polypropylene film; after completing the above operation, the electric push rod a21 is controlled to unfold, and the unfolding of the electric push rod a21 can drive the two connecting plates 2 to move outward in the vertical direction respectively. With the movement of the connecting plate 2, the connecting plate 2 and the adjusting block 16 are fixedly connected, and the adjusting block 16 and the adjusting through groove 15 are vertically slidably connected. The adjusting block 16 can be driven to move in the vertical direction while the connecting plate 2 moves, and then the connecting shaft 17 at the center thereof and the stretching roller 3 fixedly connected concentrically with the connecting shaft 17 are driven to move in the vertical direction through the movement of the adjusting block 16. At this point, with the vertical movement of the stretching roller 3, the polypropylene film wrapped around the outside thereof can be stretched transversely; in general, the utility model has the advantages of convenient operation and good stretching effect.
[0017] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of the claims of the utility model.
Claims
1. A stretching device for producing polypropylene film, comprising a mounting housing (1), a connecting plate (2), a stretching roller (3) and a pressure limiting member (4), characterized in that: The installation shell (1) is a square structure with a hollow interior. A feed port (11) is longitudinally arranged at the center of the left end face, a discharge port (12) is longitudinally arranged at the center of the right end face, and a heating component (13) is arranged on the inner top and inner bottom surfaces along the length direction thereof. A fixing plate (14) is transversely arranged in the middle of the front end face and the rear end face of the installation shell (1), and a plurality of adjustment slots (15) are staggered above and below the connection between the fixing plate (14) and the installation shell (1). The adjustment slots (15) are vertically arranged as a whole, and a square adjustment block (16) is longitudinally penetrated inside each adjustment slot (15). The adjustment block (16) is vertically slidably connected to the adjustment slot (15), and a connecting shaft (17) is longitudinally rotatably penetrated at the center of the adjustment block (16). There are two connecting plates (2), which are respectively arranged in parallel at the upper and lower ends of the fixing plate (14), wherein the connecting plate (2) located at the upper end of the fixing plate (14) is connected to the upper adjustment slot (15). The adjusting block (16) in the groove (15) is fixedly connected, the connecting plate (2) located at the lower end of the fixing plate (14) is fixedly connected to the adjusting block (16) in the lower adjusting groove (15), and a plurality of electric push rods a (21) are vertically fixedly arranged between the fixing plate (14) and the connecting plate (2); there are a plurality of stretching rollers (3), all of which are located inside the mounting housing (1) and are longitudinally and concentrically fixedly arranged between the corresponding two connecting shafts (17); the pressure limiting member ( 4) has two groups, which are respectively located outside the feed port (11) and the discharge port (12), and include a support block (41), a pressure block (42) and a fixed mounting block (43), wherein the support block (41) and the fixed mounting block (43) are both fixedly connected to the mounting housing (1), the pressure block (42) is located between the support block (41) and the fixed mounting block (43), and an electric push rod b (44) is vertically fixedly arranged between the pressure block (42) and the fixed mounting block (43).
2. A stretching device for producing polypropylene film according to claim 1, characterized in that: The support block (41) and the pressure block (42) are both of right-angled trapezoidal structure, and their pressing surfaces are inclined surfaces.
3. A stretching device for producing polypropylene film according to claim 1, characterized in that: Slide grooves are vertically arranged in the middle of the inner walls on both sides of the adjusting slot (15), and sliding blocks matching the slide groove structure are fixedly arranged on both sides of the adjusting block (16).
4. A stretching device for producing polypropylene film according to claim 1, characterized in that: Both sides of the front end surface and the rear end surface of the mounting shell (1) are vertically provided with scales.
5. A stretching device for producing polypropylene film according to claim 1, characterized in that: Conical calibration blocks (22) are fixedly arranged at both ends of the connection plate (2).