A raw material pretreatment device for release film production

Abstract

The present invention relates to the technical field of release film production, and in particular to a raw material pretreatment device for release film production, comprising a frame; a guide component, the guide component for the raw material to roll down obliquely is arranged on the frame; a feeding component, the feeding component for coating a crystallization promoter on the surface of the raw material and discharging the material to the upper end of the guide component is arranged above the guide component; the guide component comprises: a high-temperature resistant first conveyor belt, the first conveyor belt conveys the raw material in the opposite direction of the rolling direction, and the speed of the raw material rolling down along the first conveyor belt is greater than the conveying speed of the first conveyor belt; the present invention guides the raw material to roll thereon by arranging the guide component, and the raw material can promote the compactness of its own surface during the rolling process. At the same time, combined with the crystallization promoter on the surface of the raw material, the crystallization quality and crystallization speed of the raw material surface can be improved when the raw material is subsequently heated at high temperature, so as to solve the problem that the pre-drying crystallization of the raw material under high temperature conditions is still slow.

Description

Technical Field

[0001] The invention relates to the technical field of release film production, and in particular to a raw material pretreatment device for release film production. Background Art

[0002] The raw material for the production of release film is PET polyester chips, which have thermal stability problems. The equilibrium coefficient of polyester is only about 0.4, which makes the reverse reaction of the polycondensation reaction of polyester, the hydrolysis reaction, easy to proceed. The hydrolysis reaction has become the main factor of degradation in the melt extrusion process of PET resin. In order to reduce the degradation caused by hydrolysis to within the allowable range, the resin chips must be dried; in order to prevent the polyester resin chips from agglomerating during the drying process and from sticking to the screw when entering the extruder, resulting in the problem of not being able to feed smoothly, it is also necessary to crystallize the resin chips; because the crystallization process and the change of the crystallization state of the chips are carried out simultaneously with the drying process, the PET chips need to be pre-dried and crystallized;

[0003] A Chinese utility patent with authorization announcement number CN205272391U includes a first crystallization bed, a second crystallization bed and a drying tower, wherein the discharge port of the first crystallization bed and the discharge port of the second crystallization bed are respectively connected to the feed port of the drying tower, the first crystallization bed is a low-amplitude crystallization bed, the second crystallization bed is a high-amplitude crystallization bed, the longitudinal depth of the first crystallization bed is 1.5-2.5 times that of the second crystallization bed, and the amplitude of the second crystallization bed is 1.5-2.5 times that of the first crystallization bed;

[0004] Although this solution can solve the agglomeration problem in the pre-crystallization and drying process of raw materials to a certain extent, this solution has the problem of slow pre-drying crystallization of raw materials. The raw materials need to be pre-dried for a long time under high temperature conditions to fully crystallize. The higher the pre-drying crystallization temperature and the longer the drying time, the PET polyester chips will be thermally oxidized and cracked, making the performance of the chips worse, thereby affecting the production quality of the release film. The low pre-drying crystallization temperature and short time make it difficult to remove most of the free water and bound water in the PET polyester chips, and the surface of the PET polyester chips cannot be fully crystallized. Therefore, the problem of rapid crystallization of the raw materials for the production of release films under high temperature conditions is an urgent problem to be solved. Summary of the invention

[0005] The purpose of the present invention is to address some of the shortcomings of the prior art. The present invention discloses a raw material pretreatment equipment for release film production. A feeding component can be used to coat a crystallization promoter on the surface of the raw material. A guide component is provided to guide the raw material to roll thereon. The crystallization promoter can reduce or avoid heat adhesion between the raw materials. The raw material can promote the compactness of its own surface during the rolling process. At the same time, combined with the crystallization promoter on the surface of the raw material, the crystallization quality and crystallization speed of the raw material surface can be improved when the raw material is subsequently heated at high temperature, so as to solve the problem that the pre-drying crystallization of the raw material is still slow under high temperature conditions.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a raw material pretreatment device for release film production, comprising a frame;

[0007] A guide assembly, which is used for the raw material to roll down obliquely, is arranged on the frame;

[0008] A feeding component, which is used to apply a crystallization promoting agent to the surface of the raw material and discharge the material to the upper end of the guide component, is arranged above the guide component;

[0009] The guide assembly comprises:

[0010] A high temperature resistant first conveyor belt, wherein the first conveyor belt conveys the raw materials in the opposite direction to the direction in which the raw materials roll down, and the speed at which the raw materials roll down along the first conveyor belt is greater than the conveying speed of the first conveyor belt.

[0011] As an improvement, a heat-insulating shell is provided at the guide assembly, and the heat-insulating shell is used to cover the outside of the guide assembly so that the raw materials are in a preheating environment during the process of rolling down along the guide assembly.

[0012] As an improvement, the feeding assembly comprises:

[0013] A feed chute, which is used to hold raw materials and is hinged to the frame;

[0014] Rollers, multiple rollers with the same rotation direction and used to drive the raw materials to rotate intermittently, are rotatably connected to the lower end of the feed trough;

[0015] A powder storage tank is provided at the bottom of the roller for adding powdered crystallization agent to the surface of the roller;

[0016] The first driving member is used to drive the multiple rollers to rotate simultaneously and drive the feed chute to intermittently increase its inclination to dump the raw materials rotating between the multiple rollers. The first driving member is arranged on the frame.

[0017] As an improvement, the gap between adjacent rollers is the thickness of the powder required on the rollers, which can improve the uniformity of applying the crystallization promoter on the roller surface, and further improve the uniformity of applying the crystallization promoter on the raw material surface.

[0018] As an improvement, the first driving member comprises:

[0019] A gear set, the gear set comprising an incomplete gear;

[0020] A first slide plate and a first slide rail slidably adapted to the first slide plate;

[0021] The gear set used to drive the roller to rotate is transmission-connected with the roller;

[0022] The first slide plate is provided with teeth meshing with the incomplete gear, and the rotating incomplete gear intermittently drives the first slide plate to move upward to push the feed trough to tilt toward the first conveyor belt.

[0023] As an improvement, the upper end of the first slide plate is elastically connected to the lower part of one side of the feed trough or is hinged through a rod; the incomplete gear intermittently drives the first slide plate to rise so that the multiple rollers at the lower end of the feed trough take the hinge between the feed trough and the frame as the rotation center, thereby realizing the intermittent increase of the inclination angle of the multiple rollers;

[0024] As an improvement, the inclination angle is between ° and °;

[0025] As an improvement, it also includes a material shifting assembly, which is used to shift the raw materials intermittently and quantitatively when the feed chute is about to reset after tilting and swinging. The material shifting assembly is arranged at the lower part of the feed chute.

[0026] As an improvement, the material shifting assembly includes:

[0027] A rotating shaft rotatably connected to the feed chute and a first gear disposed at an end of the rotating shaft;

[0028] Used to rotate the rotating plate to transfer the raw materials intermittently and quantitatively;

[0029] An arc-shaped rack meshing with the first gear and arranged on a path where the first gear follows the inclination of the feed chute;

[0030] A damping ring, which is used to stop the first gear from rotating in a non-engaged state, is arranged at the rotation connection between the first gear and the feed trough;

[0031] The rotating plate comprises a plurality of hinged plates hinged to each other, and the hinged plates can only rotate to one side of the rotating plate.

[0032] As an improvement, a scraping assembly is provided on one side of the first conveyor belt; the scraping assembly comprises:

[0033] A coating roller, the coating roller is arranged on the frame and is attached to the surface of the first conveyor belt;

[0034] The scraper plate is arranged below the coating roller and a gap is arranged between the scraper plate and the surface of the first conveyor belt, and the coating roller is arranged adjacent to the upper surface of the scraper plate.

[0035] A storage chamber, which is used to provide a powdered crystallization agent to the coating roller and temporarily store the raw materials scraped off by the scraper plate, is arranged at the conveying path of the first conveyor belt.

[0036] As an improvement, a material spreading roller is arranged on the first conveyor belt; the rotation direction of the material spreading roller is opposite to the conveying direction of the first conveyor belt; and the distance between the material spreading roller and the first conveyor belt is larger than the maximum diameter of the raw material but smaller than twice the maximum diameter of the raw material.

[0037] As an improvement, the first conveyor belt is a spiral conveyor belt; and a hollow column is arranged in the middle of the spiral conveyor belt; and a plurality of air extraction holes are evenly arranged in the middle and upper part of the hollow column.

[0038] As an improvement, a drying bin is arranged beside the conveyor belt, and a plurality of air jet holes are evenly distributed at the lower end of the drying bin; a plurality of short-wave infrared transmitters are arranged on the top of the drying bin; the drying bin and the lower end of the first conveyor belt transport raw materials through the first conveying member.

[0039] As an improvement, the lower end of the drying bin is connected to an air pipe, through which dry, moisture-free gas is delivered to the multiple jet holes; a conventional water circulation cooling pipeline is provided at the first conveying member;

[0040] As an improvement, the first conveying member is a conveyor belt or a high temperature resistant hose arranged obliquely downward;

[0041] As an improvement, a second driving member for driving the drying bin to sift obliquely is provided at the lower end of the drying bin, a partition is provided in the drying bin, and a discharge port is provided on the side of the partition away from the first conveyor belt.

[0042] As an improvement, the second driving member includes a driving shaft; a connecting rod assembly; a mounting frame;

[0043] The driving shaft is connected to the lower end of the drying bin through a connecting rod assembly. The driving shaft and the connecting rod assembly are both rotatably connected to the mounting frame. The driving shaft rotates to drive the connecting rod assembly, so that the connecting rod assembly drives the drying bin to swing obliquely, so that part of the raw materials on one side of the drying bin can be screened to the other side of the partition.

[0044] As an improvement, no infrared emitter is provided in the drying bin on the other side of the partition, and the raw materials screened to the other side of the partition are discharged from the discharge port.

[0045] As an improvement, a screw is provided on the drying bin, the lower end of the screw is rotatably connected to the partition, and the screw is threadedly connected to the drying bin.

[0046] As an improvement, a feeding hose is provided at the upper end of the feeding trough, and the lower end of the feeding hose swings along with the feeding trough.

[0047] The beneficial effects of the present invention are:

[0048] 1. The present invention can coat the crystallization agent on the surface of the raw material through the feeding component, and guide the raw material to roll on it by setting a guide component, so that the raw material is heated at a relatively low temperature to soften some burrs and debris attached to the raw material, and the crystallization agent is attached to the surface of the raw material in the state of rolling, so that the crystallization agent can be better attached to the surface of the raw material. The crystallization agent attached to the surface of the raw material can reduce or avoid adhesion between the raw materials; the raw material can promote the compactness of its own surface during the rolling process, and combined with the effect of the crystallization agent on the surface of the raw material, it can create certain favorable conditions for the crystallization of the surface of the raw material, thereby improving the surface crystallization quality and crystallization speed of the raw material when it is subsequently heated at high temperature;

[0049] 2. The present invention sets the conveying direction of the first conveyor belt to be opposite to the direction in which the raw material rolls down. On the one hand, it can force the raw material that moves down but does not roll to roll, reduce the adhesion between the raw materials, promote the surface of the raw material to adhere to the seeding agent uniformly attached to the upper surface of the first conveyor belt, and improve the compactness of the rolling of the surface of the raw material; on the other hand, it can realize the recovery of the seeding agent scattered on the first conveyor belt;

[0050] 3. The present invention intermittently and quantitatively feeds the raw materials through the feeding assembly so that the raw materials enter between multiple rollers with the same rotation direction and rotate to be coated with the crystallization promoter. The first driving member drives the feed trough to tilt so that the multiple parallel rollers are intermittently tilted as a whole, so that the rotating rollers can drive the raw materials on them to fall onto the guide assembly, so that the raw materials coated with the crystallization promoter in the feeding assembly can enter the guide assembly in a quantitative and orderly manner, thereby improving the uniformity of the crystallization promoter coating the raw materials and reducing the problem of raw material extrusion and bonding;

[0051] 4. The present invention blocks the stacked raw materials rolling down along the first conveyor belt by means of a spreading roller, so that the raw materials can only be spread on the first conveyor belt in a single layer and roll down along the arrangement path of the first conveyor belt. On the one hand, the adhesion between the raw materials is reduced, and on the other hand, the raw materials are promoted to compact their own surfaces on the first conveyor belt by using their own gravity rolling to reduce the occurrence of softening and adhesion problems;

[0052] 5. The present invention realizes the pre-drying and crystallization of the raw material with the seed crystallizer attached to the surface by providing a spiral conveyor belt, a hollow column and a drying chamber used in combination. The hot air in the drying chamber overflows outward through the spiral conveyor belt and is drawn away by the hollow column. The overflowing hot air can pre-heat the raw material on the spiral conveyor belt, thereby saving energy and improving the adhesion effect between the raw material and the seed crystallizer.

[0053] 6. The present invention, by setting up a drying bin, can, on the one hand, promote high-frequency vibration of the raw materials and thus improve the pre-drying effect of the raw materials; on the other hand, the crystallized raw materials will be ejected higher after contacting the surface of the drying bin with vibration. The vibration trajectory of the drying bin is elliptical, so that the raw materials with a certain crystal thickness can be ejected to the other side of the partition after contacting the drying bin, thereby realizing the separation of raw materials with higher crystallinity from raw materials with lower crystallinity, thereby providing more space for raw materials with low crystallinity to improve the overall crystallization effect; at the same time, reducing the problem of oxidation caused by continued heating of raw materials with high crystallinity, thereby improving the preheating crystallization effect of the raw materials.

[0054] In summary, the present invention has the advantages of good crystallization effect of heating pre-drying PET polyester chip materials, high efficiency and reduction of the extrusion and adhesion problems during the drying of PET polyester chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0056] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0057] Figure 2 This is a schematic diagram of the structure of the feeding assembly of the present invention installed on the frame;

[0058] Figure 3 This is a schematic diagram of the internal structure of the feeding assembly of the present invention;

[0059] Figure 4 This is a schematic diagram of the structure of the feeding assembly after the interior of the feeding assembly of the present invention is tilted;

[0060] Figure 5 This is a schematic diagram of the structure of the first driving member of the present invention;

[0061] Figure 6 It is a schematic diagram of the rotating plate structure of the present invention;

[0062] Figure 7 A schematic diagram of the relative positions of the scraping assembly and the overall structure of the present invention;

[0063] Figure 8 A diagram showing the position relationship between the scraping assembly and the first conveyor belt of the present invention;

[0064] Fig. 9 It is a schematic diagram of the relative positions of the material spreading roller and the first conveyor belt of the present invention;

[0065] Fig.10 This is a schematic diagram of the overall structure of the drying bin of the present invention;

[0066] Fig.11 This is a schematic diagram of the internal structure of the drying bin of the present invention;

[0067] Figure numerals: frame 1, guide assembly 2, first conveyor belt 21, roller 211, insulation shell 22, material spreading roller 23, hollow column 24, exhaust hole 241, feeding assembly 3, feeding trough 31, rotating roller 32, powder storage trough 34, first driving member 33, gear set 331, incomplete gear 3311, first slide plate 332, first slide rail 3321, material shifting assembly 4, first gear 41, rotating plate 42, arc-shaped rack 43, damping ring 44, hinged plate 421, scraping assembly 5, smearing roller 51, scraping plate 52, storage chamber 53, drying bin 6, air jet hole 61, infrared emitter 62, first conveying member 63, air pipe 64, second driving member 65, driving shaft 651, connecting rod assembly 652, mounting frame 653, partition 66, discharge port 67, screw 68, gate 69. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0070] Embodiment 1

[0071] like Figure 1-2, 7-8, the present invention provides a raw material pretreatment device for release film production, comprising: a frame 1;

[0072] A guide assembly 2 for allowing the raw material to roll down obliquely is arranged on the frame 1;

[0073] A feeding component 3, which is used to apply a crystallization promoting agent to the surface of the raw material and discharge the material to the upper end of the guide component 2, is arranged above the guide component 2;

[0074] The guide assembly 2 comprises:

[0075] The first conveyor belt 21 is resistant to high temperature. The first conveyor belt 21 conveys the raw materials in the opposite direction to the direction in which the raw materials roll down. The speed at which the raw materials roll down along the first conveyor belt 21 is greater than the conveying speed of the first conveyor belt 21.

[0076] Furthermore, a heat-insulating shell 22 is provided at the guide assembly 2 , and the heat-insulating shell 22 is used to cover the outside of the guide assembly 2 so that the raw materials are in a low-temperature preheating environment during the process of rolling down along the guide assembly 2 .

[0077] It should be noted that a heating temperature of 100°C will rarely cause oxidation and decomposition of the raw materials. The case claims that the heating temperature that rarely or basically does not cause oxidation and decomposition of the raw materials is low-temperature heating or low-temperature preheating, and low-temperature heating cannot remove the bound water in the raw materials; the guide component 2 in this case is in a low-temperature heating environment; and the PET slices need to be heated at a high temperature of more than 140°C to remove most of the bound water in them;

[0078] The feeding component 3 can coat the crystallization agent on the surface of the raw material. After the surface of the raw material is heated, some burrs and debris attached to the raw material are softened, and can be attached to the surface of the raw material while the raw material is rolling, so that the crystallization agent can better adhere to the surface of the raw material; the raw material with the crystallization agent attached to the surface rolls down along the first conveyor belt 21 in a heated state, and the heating temperature is lower than 100°C. On the one hand, the surface of the rolling raw material will be softened to a certain extent, and the crystallization agent can better adhere to the softened raw material under rolling compaction; on the other hand, since the surface of the raw material is attached with the crystallization agent, the adhesion between the raw materials can be reduced or avoided; the raw material can promote the compactness of its own surface during rolling, thereby creating certain favorable conditions for the crystallization of the raw material surface, and at the same time, combined with the effect of the crystallization agent on the surface of the raw material, the crystallization of the raw material surface can be accelerated; the crystallization agent is sodium benzoate or talcum powder or sodium carbonate;

[0079] At the same time, the conveying direction of the first conveyor belt 21 is along the opposite direction of the rolling direction of the raw material. On the one hand, it can force the raw material that moves downward but does not roll to roll, thereby reducing the adhesion between the raw materials, promoting the surface of the raw material to adhere to the crystallization agent evenly attached to the upper surface of the first conveyor belt 21, and also improving the compactness of the raw material surface, thereby improving the subsequent crystallization quality of the raw material.

[0080] Further, such as Figure 2-4 As shown, the feeding component 3 includes:

[0081] A feed trough 31 for holding raw materials is hinged to the frame 1;

[0082] Rollers 32, a plurality of rollers 32 with the same rotation direction and used to drive the raw materials to intermittently rotate, are rotatably connected to the lower end of the feed trough 31;

[0083] A powder storage tank 34 for adding powdered crystallization agent to the surface of the rotating roller 32 is provided at the lower part of the rotating roller 32;

[0084] The first driving member 33 is provided on the frame 1 for driving the plurality of rollers 32 to rotate simultaneously and driving the feed chute 31 to intermittently increase its tilt degree so as to dump the raw materials rotating between the plurality of rollers 32 .

[0085] Furthermore, the gap between adjacent rollers 32 is the thickness of the powder required on the roller 32, which can improve the uniformity of the coating of the crystallization promoter on the surface of the roller 32, and further improve the uniformity of the coating of the crystallization promoter on the surface of the raw material.

[0086] It should be noted that the powder storage tank 34 is integrally arranged with the feed tank 31; the rough multiple rollers 32 rotate in the same direction, and the placement of the multiple rollers 32 when driving the raw materials to rotate is horizontal, and the radius of the roller 32 is larger than the maximum diameter of the raw materials, so that the raw materials are driven to rotate simultaneously by two adjacent rollers 32 between adjacent rollers 32; and the lower part of the roller 32 is located in the powder storage tank 34, so that the rotating roller 32 can take the crystallization agent while applying it to the surface of the raw materials, thereby improving the automatic and uniform application effect of the crystallization agent on the surface of the raw materials; after the raw materials between the adjacent rollers 32 are driven to rotate at least one circle, the first driving member 33 drives the feed tank 31 to tilt so that the multiple parallel rollers 32 are in an inclined state as a whole, so that the rotating roller 32 can drive the raw materials thereon to fall onto the guide assembly 2, thereby realizing the falling of the raw materials coated with the crystallization agent in the feeding assembly 3.

[0087] Further, such as Figure 3-5 As shown, the first driving member 33 includes:

[0088] A gear set 331, wherein the gear set 331 includes an incomplete gear 3311;

[0089] A first slide plate 332 and a first slide rail 3321 slidably adapted to the first slide plate 332;

[0090] The gear set 331 for driving the roller 32 to rotate is in transmission connection with the roller 32;

[0091] The first slide plate 332 is provided with teeth meshing with the incomplete gear 3311 , and the rotating incomplete gear 3311 intermittently drives the first slide plate 332 to move upward to push the feed trough 31 to tilt toward the first conveyor belt 21 .

[0092] Furthermore, the upper end of the first slide plate 332 is elastically connected to the lower part of one side of the feed trough 31 or is hinged through a rod; the incomplete gear 3311 intermittently drives the first slide plate 332 to rise so that the multiple rollers 32 at the lower end of the feed trough 31 rotate around the hinge between the feed trough 31 and the frame 1, thereby intermittently increasing the inclination angle of the multiple rollers 32;

[0093] Furthermore, the inclination angle is between 30° and 60°;

[0094] It should be noted that some gears in the gear set 331 are directly coaxially arranged with the roller 32, while other gears are gears for transmission between adjacent rollers 32, and the gear set 331 is used to realize the same direction rotation of multiple rollers 32; wherein, the axis with the same rotation center as the incomplete gear 3311 is the hinge axis of the feed trough 31; the rotation of the gear set 331 drives the roller 32 to rotate on the one hand and drives the incomplete gear 3311 to rotate on the other hand, and the incomplete gear 3311 rotates continuously to realize intermittent driving of the first slide plate 332 moves upward on the first slide rail 3321, and the first slide plate 332 is reset under the action of the reset piece at the bottom of the first slide rail 3321. The intermittently moving upward first slide plate 332 drives the intermittent tilting of the feeding trough 31. On the one hand, it realizes the loading and unloading of the raw materials coated with the crystallizing agent on the roller 32 from the feeding component 3, and makes the subsequent raw materials roll to the roller 32. On the other hand, the crystallizing agent in the powder storage tank 34 at the bottom of the roller 32 is always accumulated on the roller 32, thereby ensuring that the crystallizing agent can be applied to the surface of the roller 32.

[0095] Further, such as Figure 3-6 As shown, it also includes a material shifting assembly 4, which is used to intermittently and quantitatively shift the raw materials downward when the feed chute 31 is tilted and swung and is about to be reset. The material shifting assembly 4 is arranged at the lower part of the feed chute 31.

[0096] It should be noted that, by providing the material shifting assembly 4, it is possible to reduce or avoid the raw materials without the crystallization promoting agent applied to the surface falling directly from the roller 32 to the guide assembly 2 when the feed trough 31 is in an inclined state, and the material shifting assembly 4 is used to shift the material quantitatively so that the feeding assembly 3 can feed the material more evenly.

[0097] Further, such as Figure 3-6 As shown, the material shifting assembly 4 includes:

[0098] A rotating shaft rotatably connected to the feed chute 31 and a first gear 41 disposed at an end of the rotating shaft;

[0099] A rotating plate 42 for rotating and transferring raw materials intermittently and quantitatively;

[0100] An arc-shaped rack 43 meshing with the first gear 41 and arranged on a path where the first gear 41 follows the inclination of the feed chute 31;

[0101] A damping ring 44, which is used to stop the first gear 41 from rotating in a non-engaged state. The damping ring 44 is disposed at the rotation connection between the first gear 41 and the feed trough 31;

[0102] The rotating plate 42 includes a plurality of hinged plates 421 hinged to each other, and the hinged plates 421 can only rotate toward one side of the rotating plate 42 .

[0103] It should be noted that the rotating plate 42 can move the material when rotating in one direction, and when rotating in the other direction, the multiple hinged plates 421 hinged to each other are blocked by the raw materials or other components and are in a folded state. The folded rotating plate 42 can reduce or avoid moving the raw materials to the rollers 32, and at this time, the lower end of the feed trough 31 is in an upturned state, and the raw materials will not easily fall onto the rollers 32; in the process of the feed trough 31 being driven to swing intermittently, the first gear 41 engages with the arc-shaped rack 43 when the multiple rollers 32 tend to be placed horizontally or the outlet of the feed trough 31 is in an upturned state, so that the rotating shaft drives the rotating plate 42 to rotate the required arc and flips a certain amount of raw materials to the rollers 32, thereby realizing the quantitative moving of the raw materials.

[0104] Further, such as Figure 7-8 As shown, a scraping assembly 5 is provided on one side of the first conveyor belt 21; the scraping assembly 5 comprises:

[0105] A coating roller 51, wherein the coating roller 51 is disposed on the frame 1 and is attached to the surface of the first conveyor belt 21;

[0106] The scraper plate 52 is arranged below the smear roller 51 and a gap is set between the scraper plate 52 and the surface of the first conveyor belt 21 , and the smear roller 51 is arranged adjacent to the upper surface of the scraper plate 52 .

[0107] The storage chamber 53 , which is used to provide the coating roller 51 with a powdered crystallization agent and temporarily store the raw material scraped off by the scraper plate 52 , is arranged at the conveying path of the first conveyor belt 21 .

[0108] It should be noted that the scraper plate 52 is used to scrape off the excess crystallization agent adhered to the surface of the first conveyor belt 21; the coating roller 51 is used to apply the powdered crystallization agent to the first conveyor belt 21; the gap between the scraper plate 52 and the first conveyor belt 21 is just enough for a layer of crystallization powder to adhere to the surface of the conveyor belt, and since the coating roller 51 is close to the scraper plate 52, the coating roller 51 can reuse the crystallization powder scraped off by the scraper plate 52.

[0109] Further, such as Fig. 9 As shown, a material spreading roller 23 is provided on the first conveyor belt 21; the rotation direction of the material spreading roller 23 is opposite to the conveying direction of the first conveyor belt 21; and the distance between the material spreading roller 23 and the first conveyor belt 21 is greater than the maximum diameter of the raw material and less than twice the maximum diameter of the raw material.

[0110] It should be noted that the material spreading roller 23 can block the stacked raw materials rolling down along the first conveyor belt 21, so that the raw materials can only be spread flat on the first conveyor belt 21 in a single layer and roll down along the arrangement path of the first conveyor belt 21. On the one hand, it reduces the adhesion between the raw materials, and on the other hand, it promotes the raw materials on the first conveyor belt 21 to use their own gravity rolling to compact their own surface and reduce softening adhesion.

[0111] Embodiment 2

[0112] like Figure 1-11 As shown, the components identical or corresponding to those in the first embodiment are marked with the same reference numerals as those in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that: Figure 7-8 As shown, further, the first conveyor belt 21 is a spiral conveyor belt; and a hollow column 24 is arranged in the middle of the spiral conveyor belt; and a plurality of air extraction holes 241 are evenly arranged in the middle and upper part of the hollow column 24.

[0113] Furthermore, the hollow column 24 is used for the installation of the spiral conveyor belt on the one hand, and on the other hand, the exhaust holes 241 on the hollow column 24 can extract the evaporated steam from each layer of the spiral conveyor belt, so as to prevent the steam emitted by the raw materials on the lower conveyor belt from affecting the raw materials on the upper spiral conveyor belt, thereby improving the pre-drying effect of the raw materials; in addition, the spiral conveyor belt can extend the length of the ordinary conveyor belt, so that the raw materials can roll on the surface of the spiral conveyor belt for a long time, so that the surface of the raw materials can be better compacted, and at the same time the overall footprint of the equipment can be reduced.

[0114] Further, such as Figure 1-11 As shown, a drying bin 6 is arranged beside the conveyor belt, and a plurality of jet holes 61 are evenly distributed at the lower end of the drying bin 6; a plurality of short-wave infrared transmitters 62 are arranged on the top of the drying bin 6; the drying bin 6 and the lower end of the first conveyor belt 21 transport the raw materials through the first conveying member 63.

[0115] Furthermore, the lower end of the drying chamber 6 is connected with an air delivery pipe 64, through which dry and moisture-free gas is delivered to the plurality of air jet holes 61; a conventional water circulation cooling pipeline is provided at the first conveying member 63, which is used to cool the high-temperature gas emitted from the drying chamber 6 to the first conveyor belt 21 and reduce the temperature to less than 100°C, so as to avoid or reduce oxidation and softening adhesion of the raw materials; so as to ensure that the high-temperature resistant first conveyor belt 21 can be used for a long time; the first conveyor belt 21 and part of the high-temperature resistant flexible material are selected from high-temperature resistant graphite packing material or high-temperature resistant fluororubber or high-temperature resistant silicone rubber, wherein the use temperature of the graphite packing is between -200°C and 600°C;

[0116] It should be noted that the first conveying member 63 is a conveyor belt or a high-temperature resistant hose arranged obliquely downward; the raw material preheated and conveyed by the first conveyor belt 21 enters the drying chamber 6 along the first conveying member 63, and the raw material is boiled by spraying air on the surface of the raw material and the interior of the raw material is heated by emitting short waves through the infrared emitter 62, so as to promote the crystallization of the surface and interior of the raw material. Since the surface of the raw material is attached with a crystallization promoter, it can be quickly and evenly crystallized under high temperature conditions, which can reduce or avoid the problem of adhesion of the raw material during drying; wherein the length of the infrared short wave is 1-5μm or 1μm or 5μm; the temperature in the drying chamber 6 is above 130°C and below 160°C, so that the crystallization temperature is 10°C-25°C lower than the melting point of the crystal;

[0117] Further, such as Figure 10-11 As shown, a second driving member 65 for driving the drying bin 6 to sift obliquely is provided at the lower end of the drying bin 6 , a partition 66 is provided inside the drying bin 6 , and a discharge port 67 is provided on the side of the partition 66 away from the first conveyor belt 21 .

[0118] Furthermore, the second driving member 65 includes: a driving shaft 651; a connecting rod assembly 652; a mounting frame 653;

[0119] The driving shaft 651 is connected to the lower end of the drying bin 6 through the connecting rod assembly 652. The driving shaft 651 and the connecting rod assembly 652 are both rotatably connected to the mounting frame 653. The driving shaft 651 rotates to drive the connecting rod assembly 652, so that the connecting rod assembly 652 drives the drying bin 6 to swing obliquely, so that part of the raw materials on one side of the drying bin 6 can be screened to the other side of the partition 66.

[0120] Furthermore, the infrared emitter 62 is not provided in the drying chamber 6 on the other side of the partition 66 , and the raw materials screened to the other side of the partition 66 are discharged from the discharge port 67 .

[0121] Furthermore, a screw 68 is provided on the drying bin 6, and the lower end of the screw 68 is rotatably connected to the partition 66. The screw 68 is threadedly connected to the drying bin 6. The screw 68 is rotated to pull up the partition 66. After the raw materials are dried, the drying bin 6 is in an inclined state, and the raw materials are uniformly discharged from the discharge port 67.

[0122] It should be noted that most of the raw materials are cylindrical. Since the surface hardness of the raw materials increases and the viscosity decreases after crystallization, by setting up a drying bin 6, on the one hand, it can promote high-frequency vibration of the raw materials and thus improve the pre-drying effect of the raw materials. On the other hand, the crystallized raw materials will be ejected higher after contacting the surface of the drying bin 6. The vibration trajectory of the drying bin 6 is elliptical, so that the raw materials with a certain thickness of crystallization can be ejected to the other side of the partition 66 after contacting the drying bin 6, thereby realizing the separation of raw materials with higher crystallinity from raw materials with lower crystallinity, thereby providing more space for raw materials with low crystallinity to improve the overall crystallization effect; at the same time, the problem of oxidation caused by continued heating of raw materials with high crystallinity is reduced, thereby improving the preheating crystallization effect of the raw materials.

[0123] Furthermore, a feeding hose is provided at the upper end of the feed trough 31, and the lower end of the feeding hose swings along with the feed trough 31. Since the feed trough 31 swings only within a certain range, continuous feeding of the feed trough 31 can be achieved through the feeding hose.

[0124] Furthermore, the drying bin 6 is provided with a gate 69 slidably connected to the drying bin 6 near the discharge port 67 .

[0125] Working steps:

[0126] Step 1: Add sufficient crystallization agent powder into the powder storage tank 34, and continuously feed cylindrical PET polyester chips into the swinging feed tank 31;

[0127] Step 2: The material shifting component 4 shifts the raw material quantitatively each time the feeding component 3 swings once, and the feeding component 3 applies a crystallization agent to the surface of the raw material, and quantitatively delivers the raw material to the guide component 2 once when the feeding component 3 swings and tilts;

[0128] Step 3: The raw material rolls down along the guide assembly 2 and gradually compacts its surface while being heated;

[0129] Step 4: The raw material with the crystallization agent attached to the surface is preheated and pre-crystallized at the guide component 2 and then enters the drying chamber 6;

[0130] Step 5: The drying chamber 6 shakes and pre-dries the boiling raw materials at high temperature through the air jets 61 and the infrared emitter 62, promoting rapid crystallization on the surface of the raw materials to prevent the raw materials from being squeezed and agglomerated; at the same time, the shaking drying chamber 6 sifts the raw materials with higher crystallinity to the other side of the partition 66 and separates them from the raw materials with lower crystallinity, and the separated raw materials with higher crystallinity are discharged from the discharge port 67; after drying for a certain period of time, the partition 66 is pulled up to allow all the crystallized raw materials to be discharged from the discharge port 67.

[0131] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A raw material pretreatment device for release film production, characterized in that: include: frame; A guide assembly, which is used for the raw material to roll down obliquely, is arranged on the frame; A feeding component, which is used to apply a crystallization promoting agent to the surface of the raw material and discharge the material to the upper end of the guide component, is arranged above the guide component; The guide assembly comprises: A first high temperature resistant conveyor belt, wherein the first conveyor belt conveys the raw materials in a direction opposite to the direction in which the raw materials roll down, and the speed at which the raw materials roll down along the first conveyor belt is greater than the conveying speed of the first conveyor belt; The first conveyor belt is a spiral conveyor belt, and the raw materials on the spiral conveyor belt are preheated.

2. The raw material pretreatment equipment for release film production according to claim 1, characterized in that: The feeding assembly comprises: A feed chute, which is used to hold raw materials and is hinged to the frame; Rollers, multiple rollers with the same rotation direction and used to drive the raw materials to rotate intermittently, are rotatably connected to the lower end of the feed trough; A powder storage tank is provided at the bottom of the roller for adding powdered crystallization agent to the surface of the roller; The first driving member is used to drive the multiple rollers to rotate simultaneously and drive the feed chute to intermittently increase its inclination angle to dump the raw materials rotating between the multiple rollers. The first driving member is arranged on the frame.

3. The raw material pretreatment equipment for release film production according to claim 2, characterized in that: The first driving member comprises: A gear set, the gear set comprising an incomplete gear; A first slide plate and a first slide rail slidably adapted to the first slide plate, and the gear set for driving the roller to rotate is in transmission connection with the roller; The first slide plate is provided with teeth meshing with the incomplete gear, and the rotating incomplete gear intermittently drives the first slide plate to move upward to push the feed trough to tilt toward the first conveyor belt.

4. The raw material pretreatment equipment for release film production according to claim 3, characterized in that: It also includes a material shifting assembly, which is used to shift the raw materials intermittently and quantitatively when the feed chute is tilted and swung to reset. The material shifting assembly is arranged at the lower part of the feed chute.

5. The raw material pretreatment equipment for release film production according to claim 4, characterized in that: The material shifting assembly comprises: A rotating shaft rotatably connected to the feed chute and a first gear disposed at an end of the rotating shaft; A rotating plate for rotating and intermittently and quantitatively shifting the raw materials downward, wherein the rotating plate comprises a plurality of hinged plates hinged to each other, and the hinged plates can only rotate to one side of the rotating plate; An arc-shaped rack meshing with the first gear and arranged on a path where the first gear follows the inclination of the feed chute; A damping ring, which is used to stop the first gear from rotating when it is in a non-meshing state, is arranged at the rotation connection between the first gear and the feed trough.

6. A raw material pretreatment device for release film production according to any one of claims 1 to 5, characterized in that: A scraping assembly is provided on one side of the first conveyor belt; the scraping assembly comprises: A coating roller, the coating roller is arranged on the frame and is attached to the surface of the first conveyor belt; A scraper plate, wherein the scraper plate is arranged below the coating roller and a gap is arranged between the scraper plate and the surface of the first conveyor belt, and the coating roller is arranged adjacent to the upper surface of the scraper plate; A storage chamber, which is used to provide a powdered crystallization agent to the coating roller and temporarily store the raw materials scraped off by the scraper plate, is arranged at the conveying path of the first conveyor belt.

7. A raw material pretreatment device for release film production according to any one of claims 1 to 5, characterized in that: The first conveyor belt is provided with a material spreading roller; the rotation direction of the material spreading roller is opposite to the conveying direction of the first conveyor belt; and the spacing between the material spreading roller and the first conveyor belt is greater than the maximum diameter of the raw material and less than twice the maximum diameter of the raw material.

8. A raw material pretreatment device for release film production according to any one of claims 1 to 5, characterized in that: A hollow column is arranged in the middle of the spiral conveyor belt; a plurality of air extraction holes are evenly arranged in the middle and upper parts of the hollow column.

9. A raw material pretreatment device for release film production according to any one of claims 1 to 5, characterized in that: A drying chamber is arranged beside the conveyor belt, and a plurality of air jet holes are evenly distributed at the lower end of the drying chamber; a plurality of short-wave infrared transmitters are arranged on the top of the drying chamber; the drying chamber and the lower end of the first conveyor belt convey raw materials through the first conveying member.

10. The raw material pretreatment equipment for release film production according to claim 9, characterized in that: A second driving member for driving the drying bin to sift obliquely is disposed at the lower end of the drying bin, a partition is disposed in the drying bin, and a discharge port is disposed on a side of the partition away from the first conveyor belt.

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