A raw material crushing device for producing PET film

Abstract

This utility model belongs to the field of film manufacturing technology, specifically relating to a raw material crushing device for producing PET film. It includes a motor, a gearbox, a synchronous chain, a first bearing support, a second bearing support, a first bearing, a second bearing, a first rotating shaft, a second rotating shaft, a first cutter, a second cutter, a crushing chamber, support legs, a feed inlet, a discharge outlet, and a chamber cover. The raw material crushing device provided by this patent drives the first rotating shaft via a motor connected to a gearbox, and the synchronous chain drives the second rotating shaft to rotate synchronously. This causes the first cutter and the second cutter, evenly distributed around the first rotating shaft, to be staggered and cooperate in shearing, thus thoroughly crushing the PET film raw material and significantly improving crushing efficiency and thoroughness.

Description

Technical Field

[0001] This utility model belongs to the field of film manufacturing technology, specifically relating to a raw material crushing device for producing PET film. Background Technology

[0002] PET polyester film (PET film) is a high-performance film material made from polyethylene terephthalate (PET) through extrusion into thick sheets and biaxial stretching. It possesses properties such as high temperature resistance, puncture resistance, and good insulation, and is widely used in packaging, electronics, and optics. In the PET film production process, the crushing process during raw material pretreatment is crucial, as its crushing effect directly affects the quality of the subsequently extruded film (such as thickness uniformity, transparency, and mechanical strength).

[0003] Currently, existing PET film raw material crushing devices mainly face the following technical bottlenecks:

[0004] Most devices use a single-axis rotating or simple dual-axis parallel blade structure with fixed blade spacing and a single shearing path, which means that the raw material particles cannot be fully sheared and impacted. Especially for PET raw materials with high hardness, large particles are prone to remain, requiring multiple reprocessing and crushing, which increases energy consumption and production costs.

[0005] Some devices have poorly designed feed inlets, which can easily cause raw material blockages; the fixed position of the discharge outlet makes it difficult to clean up waste and maintain the equipment, resulting in long downtime and affecting production continuity.

[0006] In summary, existing crushing devices, due to structural design flaws, struggle to achieve efficient and refined crushing of PET raw materials. Furthermore, their limited functionality fails to meet the high-quality and high-efficiency requirements of modern film production for raw material pretreatment. Therefore, there is an urgent need to develop a novel raw material crushing device that offers superior crushing performance, integrated screening functions, and convenient operation. Utility Model Content

[0007] The purpose of this invention is to provide a device for coating and bonding PET film materials, so as to solve the problems existing in the prior art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A raw material crushing device for producing PET film includes a motor, a gearbox, a synchronous chain, a first bearing bracket, a second bearing bracket, a first bearing, a second bearing, a first rotating shaft, a second rotating shaft, a first cutter, a second cutter, a crushing box, support legs, a feed inlet, a discharge outlet, and a box cover.

[0010] The motor is connected to the input end of the gearbox, the output end of the gearbox is connected to the upper end of the first rotating shaft, and sprockets are fixed on the first rotating shaft and the second rotating shaft respectively, with the synchronous chain wound around the two sprockets;

[0011] The first cutting blades are evenly distributed around the first rotating shaft, and the second cutting blades are evenly distributed around the second rotating shaft, with the first and second cutting blades being staggered.

[0012] The lid is installed on the crushing box, the feed inlet is located on the side of the crushing box, the discharge outlet is located at the bottom of the crushing box, and the support legs are fixed to the bottom of the crushing box.

[0013] Preferably, the gearbox is fixed on a gearbox bracket, and the gearbox bracket is fixed to the gearbox cover by a support column.

[0014] Preferably, a first bearing is installed on a first rotating shaft, a second bearing is installed on a second rotating shaft, the first bearing is installed on a first bearing bracket, the second bearing is installed on a second bearing bracket, and the first bearing bracket and the second bearing bracket are respectively fixed on the cover.

[0015] Preferably, the first and second cutters are evenly distributed circumferentially along the corresponding axis of rotation, and their blades are staggered on the horizontal projection plane.

[0016] Preferably, the feed inlet is an upward-sloping flared structure, the discharge outlet is connected to the center of the bottom of the crushing box, and there are four support legs symmetrically distributed at the four corners of the bottom of the crushing box.

[0017] The beneficial effects of this utility model are as follows: The raw material crushing device provided by this patent drives the first rotating shaft through a motor connected to a reduction gearbox, and drives the second rotating shaft to rotate synchronously through a synchronous chain. This causes the first cutter evenly distributed around the first rotating shaft and the second cutter evenly distributed around the second rotating shaft to be staggered and cooperate in shearing, which can fully crush the PET film raw materials, significantly improving the crushing efficiency and thoroughness. The layout of the side feed port and the bottom discharge port facilitates the input of raw materials and the discharge of crushed materials, making operation convenient. The setting of bearings, bearing brackets and reduction gearbox brackets ensures the stability of the rotating shaft rotation and the overall structural strength of the device. Moreover, the legs are fixed to the bottom of the crushing box to ensure the smooth operation of the device. The overall structural design is reasonable and can meet the high-quality crushing requirements of raw materials in PET film production. Attached Figure Description

[0018] Figure 1 This is the front view of this utility model;

[0019] Figure 2 This is a side view of the present invention;

[0020] Figure 3 This is an enlarged view of the present invention. Detailed Implementation

[0021] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0022] like Figure 1-3 As shown, a device for coating and bonding PET film materials is disclosed. The device mainly consists of a power system, a crushing system, a support system, and a housing. The power system includes a motor 1, a gearbox 2, and a synchronous chain 3; the crushing system includes a first rotating shaft 8, a second rotating shaft 9, a first cutter 10, and a second cutter 11; the support system consists of a gearbox bracket 17, a first bearing bracket 4, a second bearing bracket 5, and support legs 13; the housing includes a crushing box 12, a box cover 16, a feed inlet 14, and a discharge outlet 15.

[0023] The output end of motor 1 is connected to the input end of gearbox 2. Gearbox 2 is fixed above the cover 16 by gearbox bracket 17. Specifically, gearbox bracket 17 is vertically fixed to the top surface of cover 16 by support columns to ensure the stability of gearbox 2. The output end of gearbox 2 is connected to the upper end of the first rotating shaft 8 to realize power transmission. Sprockets are fixed to the upper ends of the first rotating shaft 8 and the second rotating shaft 9 respectively. Synchronous chain 3 is wound around the two sprockets to form a transmission mechanism, so that the two rotating shafts can rotate synchronously in opposite directions or in the same direction (depending on the sprocket rotation design).

[0024] A first bearing 6 is installed in the middle of the first rotating shaft 8, and the first bearing 6 is embedded in the first bearing bracket 4, which is fixed to the left side of the cover 16. A second bearing 7 is installed in the middle of the second rotating shaft 9, and the second bearing 7 is embedded in the second bearing bracket 5, which is fixed to the right side of the cover 16. The bearings ensure the stability and low friction of the two rotating shafts during rotation. Multiple sets of first cutters 10 are evenly distributed circumferentially around the outer periphery of the first rotating shaft 8, and multiple sets of second cutters 11 are evenly distributed at corresponding positions around the outer periphery of the second rotating shaft 9. The first cutters 10 and second cutters 11 are staggered vertically to form multiple shearing surfaces. The blade spacing is designed to be millimeter-level according to the required particle size.

[0025] The lid 16 is detachably installed on the top of the crushing chamber 12 by bolts or clips, facilitating opening and cleaning of the interior. A feed inlet 14 is located on the upper left side wall of the crushing chamber 12. The feed inlet 14 adopts an upward-sloping flared structure to expand the feeding space and guide the raw material smoothly into the crushing area. A discharge outlet 15 is located at the center of the bottom of the crushing chamber 12 for discharging the crushed raw material. Four vertical support legs 13 are fixed at the bottom corners of the crushing chamber 12. Anti-slip pads or mounting holes can be provided on the bottom of the support legs 13 to ensure the stability of the device when placed.

[0026] After the motor 1 starts, the speed is reduced and the torque is increased through the gearbox 2, driving the first rotating shaft 8 to rotate clockwise. The first rotating shaft 8 drives the second rotating shaft 9 to rotate counterclockwise (or in the opposite direction) through the sprocket and the synchronous chain 3, so that the cutters on the two rotating shafts form a relative shearing motion.

[0027] PET film raw material is poured into the crushing chamber 12 through the feed inlet 14. It first comes into contact with the high-speed rotating first cutter 10 and second cutter 11. Due to the staggered distribution and counter-rotation of the cutters, the raw material is subjected to shearing, impact and tearing action between multiple shear surfaces, and is gradually broken into fine particles. The crushed particles fall to the bottom of the crushing chamber 12 and are discharged through the discharge outlet 15 to enter the subsequent production stage.

[0028] This device can efficiently complete the crushing process of PET film raw materials, meeting the precision and efficiency requirements of industrial production for raw material pretreatment.

[0029] It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A raw material crushing device for producing PET film, characterized in that, It includes a motor (1), a gearbox (2), a synchronous chain (3), a first bearing bracket (4), a second bearing bracket (5), a first bearing (6), a second bearing (7), a first rotating shaft (8), a second rotating shaft (9), a first cutter (10), a second cutter (11), a crushing box (12), support legs (13), a feed inlet (14), a discharge outlet (15), and a box cover (16); The motor (1) is connected to the input end of the gearbox (2), the output end of the gearbox (2) is connected to the upper end of the first rotating shaft (8), and sprockets are fixed on the first rotating shaft (8) and the second rotating shaft (9) respectively. The synchronous chain (3) is wound around the two sprockets. The first rotating shaft (8) is surrounded by a first cutter (10), and the second rotating shaft (9) is surrounded by a second cutter (11), and the first cutter (10) and the second cutter (11) are staggered. The cover (16) is installed on the crushing box (12), the feed inlet (14) is located on the side of the crushing box (12), the discharge outlet (15) is located at the bottom of the crushing box (12), and the support leg (13) is fixed to the bottom of the crushing box (12).

2. The raw material pulverizing device according to claim 1, characterized by The gearbox (2) is fixed on the gearbox bracket (17), and the gearbox bracket (17) is fixed on the gearbox cover (16) by a support column.

3. The raw material pulverizing device according to claim 1, characterized by The first bearing (6) is mounted on the first rotating shaft (8), and the second bearing (7) is mounted on the second rotating shaft (9). The first bearing (6) is mounted on the first bearing bracket (4), and the second bearing (7) is mounted on the second bearing bracket (5). The first bearing bracket (4) and the second bearing bracket (5) are respectively fixed on the box cover (16).

4. The raw material pulverizing device according to claim 1, characterized by The first cutter (10) and the second cutter (11) are evenly distributed around the corresponding axis of rotation, and their blades are staggered on the horizontal projection plane.

5. The raw material pulverizing device according to claim 1, characterized by The feed inlet (14) is a flared structure with an upward tilt. The discharge outlet (15) is connected to the center of the bottom of the crushing box (12). There are four support legs (13) symmetrically distributed at the four corners of the bottom of the crushing box (12).

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