Preparation device and process of PET oil filter screen

Abstract

The invention relates to the technical field of PET preparation, in particular to a preparation device and process of a PET oil filter screen. The preparation device of the PET oil filter screen comprises a rack, an edge cutting structure, an edge grinding structure, a discharging traction structure and a winding roller are arranged on the rack, the edge cutting structure, the edge grinding structure, the discharging traction structure and the winding roller are sequentially arranged on the rack at intervals, the edge cutting structure is used for cutting the two sides of a PET oil filter screen semi-finished product, and the edge grinding structure is used for grinding the two sides of the PET oil filter screen semi-finished product. The edge grinding structure is used for grinding the side edge of the cut PET oil filter screen semi-finished product, the discharging traction structure is used for driving the PET oil filter screen semi-finished product to sequentially pass through the edge cutting structure and the edge grinding structure and then be wound on the winding roller, and the winding roller is rotationally connected to the rack around the central axis of the winding roller. The winding device has the following effects that the winding roller rotates to enable the cut and edged PET oil filter screen semi-finished product to be wound to the winding roller, the flat and smooth effect of the side edge of the PET oil filter screen semi-finished product is improved, and the subsequent use performance and durability of the PET oil filter screen semi-finished product are improved.

Description

Technical Field

[0001] The present application relates to the technical field of PET preparation, and in particular to a preparation device and process for a PET oil filter. Background Art

[0002] In the field of mechanical manufacturing, especially in the preparation device and preparation process of PET oil filter, with the rapid development of the automobile industry and the continuous improvement of environmental protection requirements, PET oil filter, as a new type of high-efficiency filter material, has been widely used in automobile oil filter systems due to its excellent filtering performance and good corrosion resistance. However, in the preparation process, how to ensure the dimensional accuracy and surface quality of PET oil filter has become one of the focuses of the industry.

[0003] In order to solve the above problems, the prior art usually adopts a multi-step processing method to prepare the PET oil filter, which mainly includes processes such as trimming and grinding. It is mostly composed of simple mechanical structures, aiming to act on the material to be processed in sequence through multiple independent structures to achieve the required shape and edge processing.

[0004] However, although the existing preparation equipment can meet the basic needs of cutting and grinding to a certain extent, it still has certain limitations in the continuous processing process. Especially in the process of rough edge treatment after cutting, due to the lack of efficient edge grinding structure design, the side of the semi-finished PET oil filter is difficult to achieve the expected smooth effect, which in turn affects the subsequent performance and durability. Summary of the invention

[0005] In order to improve the flatness and smoothness of the side of the semi-finished PET oil filter and improve the subsequent performance and durability of the semi-finished PET oil filter, the present application discloses a preparation device for the PET oil filter.

[0006] A preparation device for a PET oil filter adopts the following technical scheme: comprising a frame, on which a trimming structure, an edge grinding structure, a material discharging traction structure and a winding roller are arranged, the trimming structure, the edge grinding structure, the material discharging traction structure and the winding roller are arranged on the frame in sequence and at intervals, the trimming structure is used for trimming the two sides of a semi-finished PET oil filter, the edge grinding structure is used for grinding the side edges of the trimmed semi-finished PET oil filter, the material discharging traction structure is used for driving the semi-finished PET oil filter to pass through the trimming structure and the edge grinding structure in sequence and then be wound on the winding roller, and the winding roller is connected to the frame by rotation around the central axis of the winding roller.

[0007] By adopting the above technical scheme, the end of the semi-finished PET oil filter screen after heat setting is manually pulled to the trimming structure by the operator, and after the trimming structure trims the irregular parts on both sides of the semi-finished PET oil filter screen neatly, it is polished by the edge grinding structure, and then the end of the semi-finished PET oil filter screen is manually wound onto the winding roller, and then the discharge traction structure drives the semi-finished PET oil filter screen to be transported in the direction close to the winding roller. At the same time, the winding roller rotates to make the semi-finished PET oil filter screen that has completed cutting and edge grinding be wound onto the winding roller, so as to improve the flatness and smoothness of the side of the semi-finished PET oil filter screen, and improve the subsequent use performance and durability of the semi-finished PET oil filter screen; during the cutting process, the discharge traction structure is suspended.

[0008] Preferably, the trimming structure includes a trimming workbench and a trimming tool, the trimming workbench is arranged at one end of the frame and the trimming workbench is located below the frame, the trimming tool is arranged on the trimming workbench, the PET oil filter semi-finished product is attached to the upper surface of the trimming workbench, and the trimming workbench is provided with a tool driving component, and the tool driving component is used to drive the trimming tool to reciprocate in the vertical direction close to or away from the upper surface of the trimming workbench.

[0009] By adopting the above technical solution, the trimming workbench provides support for the semi-finished PET oil filter, and the tool driving component drives the trimming tool to approach the trimming workbench to trim the irregular side of the semi-finished PET oil filter. After complete cutting, the tool driving component drives the trimming tool away from the trimming workbench.

[0010] Preferably, a trimming knife seat is provided on the trimming workbench, and two of the trimming knife seats are provided, and the two trimming knife seats are symmetrically arranged on both sides of the trimming workbench, and the trimming tool and the tool driving component are provided on the two trimming knife seats. The trimming knife seat is connected to the trimming workbench in a reciprocating sliding manner that can be positioned perpendicular to the axial direction of the winding roller, and trimming areas are opened on the side walls on opposite sides of the two trimming knife seats, and the trimming areas penetrate the trimming knife seats in a direction perpendicular to the axial direction of the winding roller, and the two side edges of the PET oil filter semi-finished product pass through the two trimming areas respectively, and the trimming tool is embedded in the trimming area, and the tool driving component drives the trimming tool to reciprocate and slide in the vertical direction in the trimming area.

[0011] By adopting the above technical solution, since different PET oil filter semi-finished products have different sizes, the trimming knife seat slides back and forth on the trimming workbench so that the entire trimming structure can be adapted to PET oil filter semi-finished products of different sizes. The opening of the trimming area provides guidance for the transportation of the PET oil filter semi-finished products to a certain extent.

[0012] Preferably, a dovetail slider is provided at the bottom of the trimming knife seat, a dovetail groove is provided on the trimming workbench, the dovetail slider is embedded in the dovetail groove, the depth direction of the dovetail groove is parallel to the vertical direction, the length direction of the dovetail groove is parallel to the axial direction of the winding roller, dovetail grooves are provided on both sides of the trimming workbench, and a dovetail driving component is provided on the trimming workbench for driving the dovetail slider to slide reciprocally so as to be positionable along the length direction of the dovetail groove.

[0013] By adopting the above technical solution, the special fitting shape of the dovetail slider and the dovetail slot allows the trimming tool holder to slide back and forth on the trimming workbench only along the length direction of the dovetail slot, thereby reducing the probability of the trimming tool holder falling off the trimming workbench.

[0014] Preferably, the edge grinding structure includes two grinding wheels, which are symmetrically arranged on both sides of the frame and are detachably connected to the frame. The opposite surfaces of the two grinding wheels respectively contact the two side edges of the PET oil filter semi-finished product, and the grinding wheels are connected to the frame along the axial rotation of the grinding wheels. The grinding wheels are connected to the frame along the axial direction of the winding roller and can be reciprocated and slidably positioned.

[0015] By adopting the above technical solution, the reciprocating sliding adjustment of the grinding wheel can adapt to the sizes of different PET oil filter semi-finished products; the grinding wheel contacts the PET oil filter semi-finished product and rotates, and during the rotation process, the side of the PET oil filter semi-finished product is rubbed against the side of the PET oil filter semi-finished product to grind the side of the PET oil filter semi-finished product flat.

[0016] Preferably, the discharging traction structure includes two traction rollers, the axial direction of the traction roller is parallel to the axial direction of the winding roller, the two traction rollers are arranged on the frame at intervals in the vertical direction, the spacing between the two traction rollers is used for allowing the PET oil filter semi-finished product to pass through, and elastic parts are provided at both ends of one of the traction rollers, and the elastic parts are used to make the two traction rollers tend to approach each other.

[0017] By adopting the above technical solution, the discharging traction structure arranges the elastic member so that the two traction rollers tend to approach each other, thereby ensuring the tension of the semi-finished PET oil filter during the discharging process.

[0018] Preferably, two groups of clamping assemblies are also provided on the trimming workbench, and the two groups of clamping assemblies are symmetrically arranged on the trimming workbench. The clamping assembly includes at least one clamping rod, one end of which is rotatably connected to the upper surface of the trimming knife seat, and the other end of the clamping rod is in contact with the upper surface of the PET oil filter semi-finished product on the trimming workbench.

[0019] By adopting the above technical solution, the clamping rod is in contact with the upper surface of the semi-finished PET oil filter, so that during the trimming process, the semi-finished PET oil filter and the trimming workbench are relatively fixed, thereby improving the accuracy and stability of the trimming process, further improving the smoothness of the side of the semi-finished PET oil filter, and improving the subsequent performance and durability of the semi-finished PET oil filter.

[0020] Preferably, the frame is also provided with a cooling and cooling structure, which includes a cooling circulation box, a cooling pipe and a cooling fan. A cooling chamber for embedding the cooling circulation box is opened in the trimming workbench, one end of the cooling pipe is connected with the liquid outlet of the cooling circulation box, and the other end of the cooling pipe is connected with the liquid inlet of the cooling circulation box. The cooling pipe passes over the cooling circulation box and the outer wall of the cooling pipe is in contact with the top wall of the cooling chamber. The cooling fan is arranged on the frame and is located directly above the trimming workbench.

[0021] By adopting the above technical solution, the design of the cooling structure not only cools down the semi-finished PET oil filter screen discharged after heat setting, but also ensures efficient cooling during the cutting process, thereby preventing the semi-finished PET oil filter screen from overheating and deformation.

[0022] The application also discloses a preparation process of a PET oil filter.

[0023] A preparation process of a PET oil filter comprises the following steps: S1, drying: pre-drying the PET resin slices to prevent hydrolysis; S2, extrusion: extruding an amorphous thick sheet through a T-die at 280°C in an extruder; S3, cooling; S4, stretching: biaxial stretching by tentering machine; S5, heat setting: heat setting is required to eliminate the film deformation caused by stretching; S6, trimming: using the above-mentioned PET oil filter preparation device to trim the rough edges on both sides of the semi-finished PET oil filter; S7, edge grinding: grinding both sides of the semi-finished PET oil filter using the above-mentioned PET oil filter preparation device; S8, rolling up: using the above-mentioned PET oil filter preparation device to roll up the semi-finished PET oil filter.

[0024] By adopting the above technical scheme, the semi-finished PET oil filter screen that is discharged by heat setting is rolled up after cutting and edging, thereby improving the smoothness of the side of the semi-finished PET oil filter screen and improving the subsequent performance and durability of the semi-finished PET oil filter screen.

[0025] Preferably, step S4 comprises: S41, longitudinal stretching: the preheating temperature of longitudinal stretching is 86-87°C, and the stretching ratio of longitudinal stretching is 3.0; S42, transverse stretching: the preheating temperature of the transverse stretching is 98-100°C, the stretching temperature of the transverse stretching is 100-120°C, and the stretching ratio of the transverse stretching is 2.5-4.0.

[0026] By adopting the above technical scheme, longitudinal stretching can improve the strength and ductility of the PET oil filter semi-finished product, and transverse stretching can improve the transparency and flatness of the PET oil filter semi-finished product, so as to produce a PET oil filter semi-finished product with good thermal stability.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: 1. By integrating the functions of edge cutting, edge grinding, material outfeed traction and winding into one device, it not only simplifies the production process but also improves the processing efficiency.

[0028] 2. The trimming structure realizes precise control during the trimming process by setting the trimming knife seat and the knife drive; 3. The edge grinding structure is equipped with symmetrical grinding wheels and is detachably connected to the frame, making it easy to replace and adjust; 4. The discharging traction structure sets elastic parts to make the two traction rollers tend to approach each other, ensuring the tension of the semi-finished PET oil filter during the discharging process; 5. The design of the cooling structure not only cools down the semi-finished PET oil filter after heat setting, but also ensures efficient cooling during the cutting process to prevent the semi-finished PET oil filter from overheating and deformation; 6. The entire device significantly improves the preparation accuracy and surface quality through the effective coordination of various parts, improves the smoothness of the side of the PET oil filter semi-finished product, and improves the subsequent performance and durability of the PET oil filter semi-finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of a PET oil filter preparation device of the present application; Figure 2 It is a cross-sectional schematic diagram of a partial structure of a PET oil filter preparation device of the present application; Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A; Figure 4 It is a partial structural schematic diagram of a PET oil filter preparation device of the present application; Figure 5 It is a cross-sectional schematic diagram of a partial structure of a PET oil filter preparation device of the present application; Figure 6 It is a partial structural schematic diagram of a PET oil filter preparation device of the present application; Figure 7 yes Figure 6 A partial enlarged schematic diagram of part B; Figure 8 yes Figure 6 A partial enlarged schematic diagram of part C in the middle; Fig. 9 It is a process flow chart of a preparation process of a PET oil filter screen of the present application.

[0030] Description of reference numerals: 110, frame; 111, winding roller; 112, mounting plate; 120, trimming workbench; 121, trimming knife seat; 122, trimming area; 123, tool driving member; 124, dovetail slider; 125, dovetail slide; 126, dovetail driving member; 1261, dovetail driving motor; 1262, dovetail driving screw rod; 130, trimming tool; 131, tool seat; 132, tool body; 133, screw rod; 134, nut; 135, blade limiting groove; 140, clamping rod; 141, driving rod; 142, Driving motor; 151, cooling circulation box; 152, cooling fan; 153, cooling pipe; 1531, cooling liquid inlet main pipe; 1532, cooling liquid outlet main pipe; 1533, cooling branch pipe; 154, cooling chamber; 160, grinding wheel; 161, adjusting screw; 162, adjusting screw motor; 163, guide rod; 164, adjusting slider; 165, L-shaped connecting block; 166, grinding motor; 170, traction roller; 171, elastic part; 1711, adjusting spring; 1712, elastic belt; 172, adjusting block; 173, adjusting groove. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings.

[0032] The present application discloses a PET oil filter preparation device, which is used to improve the flatness and smoothness of the side of a semi-finished PET oil filter, and to improve the subsequent use performance and durability of the semi-finished PET oil filter.

[0033] refer to Figure 1A PET oil filter preparation device comprises a frame 110, on which a trimming structure, an edge grinding structure, a discharging traction structure and a winding roller 111 are arranged, the trimming structure, the edge grinding structure, the discharging traction structure and the winding roller 111 are arranged on the frame 110 in sequence and at intervals, the trimming structure is used to trim the two sides of the semi-finished PET oil filter, the edge grinding structure is used to grind the side of the cut PET oil filter semi-finished product, the discharging traction structure is used to drive the semi-finished PET oil filter to pass through the trimming structure and the edge grinding structure in sequence and then be wound on the winding roller 111, the winding roller 111 is rotated around the central axis of the winding roller 111 and connected to the frame 110, and the PET oil after heat setting is completed The end of the semi-finished filter screen is manually pulled to the trimming structure by the operator. After the trimming structure trims the irregular parts on both sides of the semi-finished PET oil filter screen neatly, it is polished by the edge grinding structure, and then the end of the semi-finished PET oil filter screen is manually wound onto the winding roller 111. Then the discharging traction structure drives the semi-finished PET oil filter screen to be transported in the direction close to the winding roller 111. At the same time, the winding roller 111 rotates to make the semi-finished PET oil filter screen that has been cut and edged wound onto the winding roller 111, so as to improve the smoothness of the side of the semi-finished PET oil filter screen, and improve the subsequent use performance and durability of the semi-finished PET oil filter screen. During the cutting process, the discharging traction structure is suspended.

[0034] refer to Figure 2 , Figure 3 The edge structure includes a trimming workbench 120 and a trimming tool 130. The trimming workbench 120 is arranged at one end of the frame 110 and the trimming workbench 120 is located below the frame 110. A trimming knife seat 121 is arranged on the trimming workbench 120. There are two trimming knife seats 121. The two trimming knife seats 121 are symmetrically arranged on both sides of the trimming workbench 120. The semi-finished PET oil filter is attached to the upper surface of the trimming workbench 120. In this embodiment, a trimming area 122 is opened on the side walls of the opposite sides of the two trimming knife seats 121. The trimming area 122 penetrates the trimming knife seat 121 along the axial direction perpendicular to the winding roller 111, that is, the trimming area 122 penetrates the two sides of the trimming knife seat 121 along the length direction of the trimming knife seat 121. On the other hand, the two side edges of the semi-finished PET oil filter pass through two trimming areas 122 respectively, the trimming tool 130 is embedded in the trimming area 122, and the trimming workbench 120 is provided with a tool driver 123. Specifically, the tool driver 123 is a driving cylinder, and each trimming tool seat 121 is provided with two tool drivers 123. The tool drivers 123 are arranged in the vertical direction. The two tool drivers 123 on the same trimming tool seat 121 are symmetrically penetrated in the trimming tool seat 121, and the piston rod of the tool driver 123 penetrates into the trimming area 122 and is connected with the trimming tool 130, thereby driving the trimming tool 130 to reciprocate in the vertical direction to approach or move away from the upper surface of the trimming workbench 120.

[0035] In this embodiment, the trimming tool 130 includes a tool seat 131 and a tool body 132. The side of the tool body 132 away from the blade is embedded in the tool seat 131. The tool body 132 and the tool seat 131 are detachably connected by a screw 133 and a nut 134. There are multiple groups of screws 133 and nuts 134, and the multiple groups of screws 133 and nuts 134 are arranged at equal distances along the length direction of the trimming tool 130. The nut 134 is sleeved on the screw 133. The screw 133 passes through the tool seat 131 and the tool body 132 and is threadedly connected to the nut 134. A blade limiting groove 135 is opened on the trimming tool seat 121, and the blade limiting groove 135 is opened on the bottom inner wall of the trimming area 122.

[0036] Since the sizes of different PET oil filter semi-finished products are different, the trimming tool seat 121 is connected to the trimming workbench 120 in a reciprocating manner that can be positioned perpendicular to the axial direction of the winding roller 111, and the tool driving member 123 drives the trimming tool 130 to reciprocate in the vertical direction in the trimming area 122, so that the entire trimming structure can be adapted to PET oil filter semi-finished products of different sizes.

[0037] refer to Figure 1 , Figure 4 A dovetail slider 124 is provided at the bottom of the trimming knife seat 121, and a dovetail slot 125 is provided on the trimming workbench 120. The dovetail slider 124 is embedded in the dovetail slot 125. The depth direction of the dovetail slot 125 is parallel to the vertical direction, and the length direction of the dovetail slot 125 is parallel to the axial direction of the winding roller 111. Dovetail slots 125 are provided on both sides of the trimming workbench 120. A dovetail driving member 126 is provided on the trimming workbench 120 for driving the dovetail slider 124 to reciprocate and slide along the length direction of the dovetail slot 125. The special fitting shape of the dovetail slider 124 and the dovetail slot 125 enables the trimming knife seat 121 to only slide back and forth on the trimming workbench 120 along the length direction of the dovetail slot 125, thereby reducing the probability of the trimming knife seat 121 falling off the trimming workbench 120.

[0038] In this embodiment, the dovetail driving component 126 includes a dovetail driving motor 1261 and a dovetail driving screw 1262. The dovetail driving screw 1262 is embedded in the dovetail slot 125. The length direction of the dovetail driving screw 1262 is parallel to the length direction of the dovetail slot 125. The dovetail driving motor 1261 is arranged on a side wall of the trimming workbench 120. One end of the dovetail driving screw 1262 is circumferentially rotatable and axially fixedly connected to the slot wall of the dovetail slot 125. The other end of the dovetail driving screw 1262 vertically passes through the slot wall of the dovetail slot 125 and is coaxially connected to the output shaft of the dovetail driving motor 1261.

[0039] Further, refer to Figure 2 , Figure 4Two groups of clamping assemblies are also provided on the trimming workbench 120, and the two groups of clamping assemblies are symmetrically arranged on the trimming workbench 120. The clamping assemblies correspond to the trimming knife seat 121 one by one, and the clamping assemblies are arranged on the trimming knife seat 121. In this embodiment, the clamping assembly includes three clamping rods 140, and the three clamping rods 140 and two tool driving members 123 are arranged in sequence and at intervals on the upper surface of the trimming knife seat 121. One end of the clamping rod 140 is rotatably connected to the upper surface of the trimming knife seat 121, and the other end of the clamping rod 140 is in contact with the upper surface of the semi-finished PET oil filter on the trimming workbench 120. A driving rod 141 and a driving motor 142 are provided on the upper surface of the trimming knife seat 121. The driving rod 141 passes through one end of the clamping rod 140 in sequence, and the driving rod 141 and the clamping rod 140 are fixedly connected.

[0040] refer to Figure 1 , Figure 5 The frame 110 is also provided with a cooling structure, which includes a cooling circulation box 151, a cooling pipe 153 and a cooling fan 152. A cooling chamber 154 for embedding the cooling circulation box 151 is provided in the trimming workbench 120. In this embodiment, the cooling pipe 153 includes a cooling liquid inlet main pipe 1531, a cooling liquid outlet main pipe 1532 and a plurality of cooling branch pipes 1533. One end of the cooling branch pipe 1533 is connected to the cooling liquid inlet main pipe 1531, and the other end of the cooling branch pipe 1533 is connected to the cooling liquid outlet main pipe 1531. The cooling liquid outlet main pipe 1532 is connected, and multiple cooling branch pipes 1533 are evenly distributed above the top box wall of the cooling circulation box 151. One end of the cooling liquid inlet main pipe 1531 away from the cooling branch pipe 1533 is connected to the liquid outlet of the cooling circulation box 151, and the other end of the cooling liquid outlet main pipe 1532 away from the cooling branch pipe 1533 is connected to the liquid inlet of the cooling circulation box 151. The cooling pipe 153 passes over the cooling circulation box 151 and the outer wall of the cooling pipe 153 is in contact with the top wall of the cooling chamber 154.

[0041] The cooling fan 152 is arranged on the frame 110 and is located directly above the trimming workbench 120. In the present embodiment, a mounting plate 112 is arranged on the frame 110, and the mounting plate 112 is located directly above the trimming workbench 120. A total of four cooling fans 152 are arranged. The four cooling fans 152 are distributed in a rectangular shape and the cooling fans 152 are embedded in the mounting plate 112.

[0042] Further, refer to Figure 6 , Figure 7The side structure includes two grinding wheels 160, which are symmetrically arranged on both sides of the frame 110 and are detachably connected to the frame 110. The opposite surfaces of the two grinding wheels 160 respectively contact the two side edges of the semi-finished PET oil filter. The grinding wheels 160 are connected to the frame 110 along the axial rotation of the grinding wheels 160. During the rotation process, the side edges of the semi-finished PET oil filter are rubbed flat. The grinding wheels 160 are connected to the frame 110 in a reciprocating sliding manner that can be positioned along the axial direction of the winding roller 111. In this embodiment, the frame 110 is provided with an adjusting screw rod 161 and an adjusting screw rod motor 162. and guide rod 163, the length direction of the adjusting screw rod 161 is parallel to the length direction of the guide rod 163 and the length direction of the winding roller, two adjusting sliders 164 are arranged on the frame 110, the two adjusting sliders 164 correspond to the two grinding wheels 160 one by one, the grinding wheels 160 are detachably connected to the adjusting sliders 164 through L-shaped connecting blocks 165, the two grinding wheels 160 are respectively arranged on the opposite side walls of the two L-shaped connecting blocks 165, a grinding motor 166 is arranged on the side wall of the L-shaped connecting block 165 away from the grinding wheel 160, and the output shaft of the grinding motor 166 passes through the L-shaped connecting block 165 and is coaxially connected to the grinding wheel 160.

[0043] The adjusting screw 161 and the guide rod 163 both pass through the two adjusting sliders 164 in sequence, and the adjusting screw 161 is symmetrically divided into a left half and a right half. The threads on the outer wall of the left half and the threads on the outer wall of the right half have opposite screw directions. The adjusting screw motor 162 is arranged on the frame 110, and one end of the adjusting screw 161 is connected to the frame 110 in a circumferentially rotatable and axially fixed manner, and the other end of the adjusting screw 161 passes through the frame 110 and is coaxially connected to the output shaft of the adjusting screw motor 162.

[0044] In addition, refer to Figure 6 , Figure 8 The discharging traction structure includes two traction rollers 170, the axial direction of the traction roller 170 is parallel to the axial direction of the winding roller 111, the two traction rollers 170 are arranged on the frame 110 at intervals in the vertical direction, and the spacing between the two traction rollers 170 is used for the PET oil filter semi-finished product to pass through, and elastic members 171 are arranged at both ends of one of the traction rollers 170, and the elastic member 171 is used to make the two traction rollers 170 have a tendency to approach each other. In this embodiment, the elastic member 171 includes an adjusting spring 1711 and an elastic belt 1712, and an adjusting block 172 is arranged at both ends of the traction roller 170, and the upper surface and the lower surface of the adjusting block 172 are connected to the adjusting spring 1711, and the frame 110 is provided with an adjusting groove 173 for embedding the adjusting block 172 and the adjusting spring 1711, and the end of the adjusting spring 1711 away from the adjusting block 172 is connected to the groove wall of the adjusting groove 173, and the elastic belt 1712 is wound around the two traction rollers 170.

[0045] The implementation principle of a PET oil filter preparation device according to an embodiment of the present application is as follows: by integrating the trimming, grinding, discharge traction and winding functions into one device, not only the production process is simplified, but also the processing efficiency is improved. The trimming structure realizes precise control during the trimming process by setting a trimming knife seat 121 and a knife driver 123; the grinding structure is provided with symmetrical grinding wheels 160 and forms a detachable connection with the frame 110, which is convenient for replacement and adjustment; the discharge traction structure is provided with an elastic member 171 so that the two traction rollers 170 have a tendency to approach each other, thereby ensuring the tension of the semi-finished PET oil filter during the processing. In addition, the design of the cooling structure ensures efficient cooling during the cutting process and prevents the material from overheating and deformation. Through the effective coordination of various parts, the entire device significantly improves the preparation accuracy and surface quality, improves the smoothness of the side of the semi-finished PET oil filter, and improves the subsequent use performance and durability of the semi-finished PET oil filter.

[0046] refer to Fig. 9 A preparation process of a PET oil filter comprises the following steps: S1, drying: pre-drying the PET resin slices to prevent hydrolysis; S2, extrusion: extruding an amorphous thick sheet through a T-die at 280°C in an extruder; S3, cooling; S4, stretching: biaxial stretching by tentering machine; S5, heat setting: heat setting is required to eliminate the film deformation caused by stretching; S6, trimming: trimming the rough edges on both sides of the semi-finished PET oil filter using the above-mentioned PET oil filter preparation device; S7, edge grinding: grinding both sides of the semi-finished PET oil filter using the above-mentioned PET oil filter preparation device; S8, rolling up: using the above-mentioned PET oil filter preparation device to roll up the semi-finished PET oil filter.

[0047] Step S4 includes: S41, longitudinal stretching: the preheating temperature of longitudinal stretching is 86-87°C, and the stretching ratio of longitudinal stretching is 3.0; S42, transverse stretching: the preheating temperature of the transverse stretching is 98-100°C, the stretching temperature of the transverse stretching is 100-120°C, and the stretching ratio of the transverse stretching is 2.5-4.0.

[0048] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A PET oil filter preparation device, comprising a frame (110), characterized in that: The frame (110) is provided with a trimming structure, an edge grinding structure, a material discharging traction structure and a winding roller (111); the trimming structure, the edge grinding structure, the material discharging traction structure and the winding roller (111) are sequentially arranged on the frame (110) at intervals; the trimming structure is used to trim the two sides of the PET oil filter semi-finished product; the edge grinding structure is used to grind the side of the trimmed PET oil filter semi-finished product; the material discharging traction structure is used to drive the PET oil filter semi-finished product to pass through the trimming structure and the edge grinding structure in sequence and then be wound on the winding roller (111); the winding roller (111) is rotatably connected to the frame (110) around the central axis of the winding roller (111).

2. The device for preparing a PET oil filter according to claim 1, characterized in that: The trimming structure comprises a trimming workbench (120) and a trimming tool (130); the trimming workbench (120) is arranged at one end of the frame (110) and the trimming workbench (120) is located below the frame (110); the trimming tool (130) is arranged on the trimming workbench (120); a semi-finished PET oil filter is attached to the upper surface of the trimming workbench (120); the trimming workbench (120) is provided with a tool driving component (123); the tool driving component (123) is used to drive the trimming tool (130) to reciprocate in a vertical direction to approach or move away from the upper surface of the trimming workbench (120).

3. The device for preparing a PET oil filter according to claim 2, characterized in that: The trimming workbench (120) is provided with a trimming knife seat (121), and two trimming knife seats (121) are provided. The two trimming knife seats (121) are symmetrically arranged on both sides of the trimming workbench (120), and the trimming tool (130) and the tool driving member (123) are both arranged on the two trimming knife seats (121). The trimming knife seats (121) are connected to the trimming workbench (120) in a reciprocating sliding manner that can be positioned perpendicular to the axial direction of the winding roller (111). The two A trimming area (122) is provided on the side wall opposite to the trimming knife seat (121); the trimming area (122) penetrates the trimming knife seat (121) along an axial direction perpendicular to the winding roller (111); two side edges of the semi-finished PET oil filter screen pass through the two trimming areas (122) respectively; the trimming tool (130) is embedded in the trimming area (122); and the tool driving component (123) drives the trimming tool (130) to slide back and forth in the vertical direction in the trimming area (122).

4. The device for preparing a PET oil filter according to claim 3, characterized in that: A dovetail slider (124) is provided at the bottom of the trimming knife seat (121), a dovetail groove (125) is provided on the trimming workbench (120), the dovetail slider (124) is embedded in the dovetail groove (125), the depth direction of the dovetail groove (125) is parallel to the vertical direction, the length direction of the dovetail groove (125) is parallel to the axial direction of the winding roller (111), dovetail grooves (125) are provided on both sides of the trimming workbench (120), and a dovetail driving member (126) is provided on the trimming workbench (120) for driving the dovetail slider (124) to slide back and forth in a positionable manner along the length direction of the dovetail groove (125).

5. The device for preparing a PET oil filter according to claim 1, characterized in that: The edge grinding structure comprises two grinding wheels (160), the two grinding wheels (160) are symmetrically arranged on both sides of the frame (110) and the grinding wheels (160) are detachably connected to the frame (110), the opposite surfaces of the two grinding wheels (160) respectively contact the two side edges of the PET oil filter semi-finished product, the grinding wheels (160) are rotatably connected to the frame (110) along the axial direction of the grinding wheels (160), and the grinding wheels (160) are axially positionably connected to the frame (110) by reciprocating sliding.

6. The device for preparing a PET oil filter according to claim 1, characterized in that: The material discharging traction structure comprises two traction rollers (170), the axial direction of the traction roller (170) is parallel to the axial direction of the winding roller (111), the two traction rollers (170) are arranged on the frame (110) at intervals in the vertical direction, the spacing between the two traction rollers (170) is used for allowing the PET oil filter semi-finished product to pass through, and elastic parts (171) are arranged at both ends of one of the traction rollers (170), and the elastic parts (171) are used to make the two traction rollers (170) have a tendency to approach each other.

7. The device for preparing a PET oil filter according to claim 3, characterized in that: The trimming workbench (120) is also provided with two groups of clamping assemblies, the two groups of clamping assemblies being symmetrically arranged on the trimming workbench (120), the clamping assemblies comprising at least one clamping rod (140), one end of the clamping rod (140) being rotatably connected to the upper surface of the trimming knife seat (121), and the other end of the clamping rod (140) being in contact with the upper surface of the semi-finished PET oil filter on the trimming workbench (120).

8. The device for preparing a PET oil filter according to claim 3, characterized in that: The frame (110) is also provided with a cooling structure (), the cooling structure () comprising a cooling circulation box (151), a cooling pipe (153) and a cooling fan (152); a cooling chamber (154) for embedding the cooling circulation box (151) is provided in the trimming workbench (120); one end of the cooling pipe (153) is connected to a liquid outlet of the cooling circulation box (151); the other end of the cooling pipe (153) is connected to a liquid inlet of the cooling circulation box (151); the cooling pipe (153) passes over the cooling circulation box (151) and the outer wall of the cooling pipe (153) is in contact with the top wall of the cooling chamber (154); the cooling fan (152) is provided on the frame (110) and is located directly above the trimming workbench (120).

9. A process for preparing a PET oil filter, characterized in that: The following steps are involved: S1, drying: pre-drying the PET resin slices to prevent hydrolysis; S2, extrusion: extruding an amorphous thick sheet through a T-die at 280°C in an extruder; S3, cooling; S4, stretching: biaxial stretching by tentering machine; S5, heat setting: heat setting is required to eliminate the film deformation caused by stretching; S6, trimming: using the above-mentioned PET oil filter preparation device to trim the rough edges on both sides of the semi-finished PET oil filter; S7, edge grinding: grinding both sides of the semi-finished PET oil filter using the above-mentioned PET oil filter preparation device; S8, rolling up: using the above-mentioned PET oil filter preparation device to roll up the semi-finished PET oil filter.

10. The process for preparing a PET oil filter according to claim 9, characterized in that: The step S4 comprises: S41, longitudinal stretching: the preheating temperature of longitudinal stretching is 86-87°C, and the stretching ratio of longitudinal stretching is 3.0; S42, transverse stretching: the preheating temperature of the transverse stretching is 98-100°C, the stretching temperature of the transverse stretching is 100-120°C, and the stretching ratio of the transverse stretching is 2.5-4.0.

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