Cutting mechanism of high-molecular polylactic acid solid extrusion molding machine

Abstract

The utility model discloses a material cutting mechanism of a high-molecular polylactic acid solid extrusion molding machine, which comprises a bearing plate, a slitting component used for slitting an extruded polylactic acid product is arranged at the upper end of the bearing plate, and a driving mechanism used for driving the slitting component to lift is arranged at the lower end of the bearing plate. The slitting assembly is matched with the lifting motion of the driving mechanism, product slitting can be rapidly completed, the production efficiency is improved, accurate slitting positions are guaranteed through gear and rack transmission and guide of the sliding rails and the sliding blocks, size deviation is avoided, and when extruded products are in a heat preservation state, the product quality is improved. The slitting assembly can be lowered to the position below the die head through the driving mechanism, and operation of other working procedures is not affected.

Description

Technical Field

[0001] This utility model relates to the field of solid extrusion molding technology of polylactic acid (PLA), and particularly to the cutting mechanism of a solid extrusion molding machine for PLA. Background Technology

[0002] Polylactic acid (PLA) is a biodegradable and environmentally friendly polymer material with good biocompatibility.

[0003] Polylactic acid (PLA) products manufactured using traditional injection molding processes inherently suffer from low density and insufficient burst strength, making it difficult to meet the stringent mechanical property requirements of high-end fields such as medical devices. Solid-state extrusion molding technology, through a secondary densification treatment of the injection preform, can significantly improve the material's density and crack resistance. After extrusion through the die, the molded product needs to be cut to a fixed length using a slitting device to meet subsequent processing needs. Utility Model Content

[0004] The purpose of this invention is to provide a cutting mechanism for a polylactic acid solid extrusion molding machine to solve the automatic cutting requirements of the molded products.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The cutting mechanism of a polylactic acid solid extrusion molding machine includes a support plate. The upper end of the support plate is provided with a cutting component for cutting the extruded polylactic acid product. The cutting component includes a micro geared motor and a cutter. A fixed seat is fixedly provided on the upper side of the support plate. The micro geared motor is fixedly installed in the fixed seat, and the cutter is fixedly installed on the output shaft of the micro geared motor.

[0007] As a further embodiment of this utility model, the lower end of the support plate is provided with a drive mechanism for driving the slitting component to rise and fall. The drive mechanism includes a drive motor, a gear and a rack. The gear is fixedly mounted on the rotating shaft of the drive motor, and the rack is fixedly mounted on the same side of the support plate as the drive motor. The gear and the rack mesh with each other.

[0008] As a preferred embodiment of this utility model, the mechanism further includes a fixing plate, which is fixed on the frame of the polylactic acid solid extrusion molding machine, and the drive motor is fixedly mounted on the fixing plate.

[0009] As a further embodiment of this utility model, a slide rail is fixedly provided on the same side of the bearing plate where the drive motor is located, and a slider is fixedly installed on the frame of the polylactic acid solid extrusion molding machine, with the slider slidably connected to the slide rail.

[0010] As a preferred embodiment of this utility model, the support plate is provided with weight reduction holes.

[0011] Compared to existing technologies, the cutting mechanism of this utility model's polylactic acid solid extrusion molding machine has the following advantages: This utility model, through the combination of a slitting component and the lifting motion of the drive mechanism, can quickly complete product slitting, improving production efficiency. Gear and rack transmission, along with slide rails and slider guides, ensure precise slitting position, avoiding dimensional deviations. Furthermore, when the extruded product is in a heat-insulating state, the slitting component can be lowered below the die head via the drive mechanism without affecting the operation of the heat-insulating mechanism. This utility model has a compact structure; the support plate integrates the slitting component and drive mechanism, reducing space occupation and adapting to the needs of miniaturized equipment. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 1 ;

[0013] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 2 ;

[0014] Figure 3 This is a schematic diagram of the structure of this utility model installed on a polylactic acid solid extrusion molding machine.

[0015] Figure label:

[0016] 1. Support plate; 101. Weight reduction hole; 2. Slitting assembly; 201. Miniature geared motor; 202. Fixing base; 203. Cutter; 3. Drive mechanism; 301. Drive motor; 302. Gear; 303. Rack; 304. Fixing plate; 4. Slide rail; 5. Slider. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0018] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0019] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present invention should be understood according to the specific circumstances.

[0020] See Figure 1 , 2 As shown, the cutting mechanism of the polylactic acid solid extrusion molding machine of this utility model includes a support plate 1, a cutting component 2 for cutting the polylactic acid product after extrusion molding is provided on the upper end of the support plate 1, and a driving mechanism 3 for driving the cutting component 2 to rise and fall is provided on the lower end of the support plate 1.

[0021] The drive mechanism 3 drives the support plate 1 to move up and down, so that the cutter 203 of the slitting component 2 moves up and down to realize the slitting operation of polylactic acid products. When the extruded polylactic acid products are in the heat preservation state, the slitting component 2 can be lowered to below the die head by the drive mechanism 3 without affecting the operation of the heat preservation mechanism.

[0022] See Figure 1 As shown, in this embodiment of the present invention, the slitting component 2 includes a micro geared motor 201 and a cutter 203. A fixed seat 202 is fixedly provided on the upper side of the support plate 1. The micro geared motor 201 is fixedly mounted on the fixed seat 202, and the cutter 203 is fixedly mounted on the output shaft of the micro geared motor 201.

[0023] In use, the miniature geared motor 201 drives the cutter 203 to rotate at high speed via its output shaft, and the rotating cutter cuts the polylactic acid product. The mounting base 202 provides stable support for the miniature geared motor 201.

[0024] See Figure 2 As shown, in this embodiment of the present invention, the drive mechanism 3 includes a drive motor 301, a gear 302 and a rack 303. The gear 302 is fixedly mounted on the rotating shaft of the drive motor 301, and the rack 303 is fixedly mounted on the same side of the drive motor on the support plate 1. The gear 302 meshes with the rack 303.

[0025] During cutting, the drive motor 301 drives the gear 302 to rotate. The gear 302 meshes with the rack 303, converting the rotational motion into linear motion, thereby driving the support plate 1 and the cutting assembly 2 to rise and fall as a whole.

[0026] This embodiment of the utility model also includes a fixing plate 304, which is fixed on the frame of the polylactic acid solid extrusion molding machine. The drive motor 301 is fixedly installed on the fixing plate 304. The fixing plate 304 serves as the mounting base for the drive motor 301 and is fixed by the frame to ensure that the drive motor 301 is stable during operation and to avoid a decrease in cutting accuracy due to vibration.

[0027] In this embodiment of the present invention, a slide rail 4 is fixedly installed on the same side of the support plate 1 where the drive motor 301 is located. A slider 5 is fixedly installed on the frame of the polylactic acid solid extrusion molding machine. The slider 5 is slidably connected to the slide rail 4. The slider 5 and the slide rail 4 form a sliding pair, which provides guidance for the lifting and lowering movement of the support plate 1, ensuring that the cutting component 2 moves smoothly in the vertical direction and avoiding deviation or jamming.

[0028] See Figure 1 As shown, in this embodiment of the present invention, a weight reduction hole 101 is provided on the support plate 1. The weight reduction hole 101 reduces the amount of material used in the support plate 1, thereby reducing the weight of the mechanism while maintaining sufficient structural strength, reducing the load on the drive mechanism 3, and improving energy utilization efficiency.

[0029] See Figure 3 As shown, after the polylactic acid solid extrusion molding machine completes the product extrusion, the cutting mechanism begins to work:

[0030] Cutting preparation: Drive motor 301 drives the support plate 1 to rise through the meshing of gear 302 and rack 303, so that the cutter 203 approaches the polylactic acid product to be cut.

[0031] Cutting execution: The micro geared motor 201 drives the cutter 203 to rotate at high speed, while the drive mechanism 3 continues to push the support plate 1 upward, and the rotating cutter 203 is used to cut the product.

[0032] Reset cycle: After the cutting is completed, the drive mechanism 3 drives the carrier plate 1 to descend and reset, waiting for the next cutting command.

[0033] Guiding and stabilizing: The slide rail 4 and the slider 5 ensure the smooth movement of the support plate 1, and the fixed plate 304 fixes the drive motor 301 to avoid vibration affecting the cutting accuracy.

[0034] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. The cutting mechanism of a polylactic acid solid extrusion molding machine, characterized in that: Includes a support plate (1), and the upper end of the support plate (1) is provided with a slitting component (2) for slitting the polylactic acid product after extrusion molding. The slitting assembly (2) includes a micro geared motor (201) and a cutter (203). A fixed seat (202) is fixedly provided on the upper side of the support plate (1). The micro geared motor (201) is fixedly mounted on the fixed seat (202), and the cutter (203) is fixedly mounted on the output shaft of the micro geared motor (201).

2. The cutting mechanism of the polylactic acid solid extrusion molding machine according to claim 1, characterized in that: The lower end of the support plate (1) is provided with a drive mechanism (3) for driving the cutting component (2) to rise and fall. The drive mechanism (3) includes a drive motor (301), a gear (302) and a rack (303). The gear (302) is fixedly mounted on the shaft of the drive motor (301), and the rack (303) is fixedly mounted on the same side of the drive motor (301) on the support plate (1). The gear (302) meshes with the rack (303).

3. The cutting mechanism of the polylactic acid solid extrusion molding machine according to claim 2, characterized in that: It also includes a fixing plate (304), which is fixed on the frame of the polylactic acid solid extrusion molding machine, and the drive motor (301) is fixed on the fixing plate (304).

4. The cutting mechanism of the polylactic acid solid extrusion molding machine according to claim 3, characterized in that: The drive motor (301) is located on the same side of the bearing plate (1) and a slide rail (4) is provided. The frame of the polylactic acid solid extrusion molding machine is fixedly provided with a slider (5) that is slidably connected to the slide rail (4).

5. The cutting mechanism of the polylactic acid solid extrusion molding machine according to any one of claims 1-4, characterized in that: The bearing plate (1) has a weight reduction hole (101).

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