A raw material preheating device for plastic cups

Abstract

The present invention relates to the field of drying technology, and in particular to a raw material preheating device for plastic cups, comprising a heating bin and a conveying mechanism, wherein a heating channel is formed inside the heating bin, the heating channel extends along a first direction, the conveying mechanism passes through the heating channel, and the conveying mechanism comprises a frame, a driving wheel, a driven wheel, a conveyor belt and a guide assembly, and the frame is arranged on the heating bin. The present invention is provided with a guide assembly, and since the guide assembly is arranged in the frame and located on the inner side of the conveyor belt, under the guiding action of the guide assembly, the surface of the conveyor belt fluctuates, and the positions of the peaks and troughs on the surface of the conveyor belt change alternately, so that the material entering the heating channel continuously rolls and moves forward due to the fluctuations of the surface of the conveyor belt, so that the contact position between the material and the conveyor belt continuously changes, so as to improve the temperature uniformity of the material and make the overall heating uniformity of the material better.

Description

Technical Field

[0001] The invention relates to the technical field of drying, in particular to a raw material preheating device for plastic cups. Background Art

[0002] When making plastic cups, workers usually first use a sheet machine to make new plastic PP granules into sheets, then roll the sheets into a roll, then heat the plastic sheet to a softened state, and then form the roll into the desired shape through a mold. This manufacturing method is widely used in food packaging, beverage containers and other fields, and is favored for its low cost and high production efficiency.

[0003] Before the plastic PP particles enter the sheet machine, they need to be preheated first. This is because when the PP particles that have not been preheated are directly fed into the sheet machine, there will be a large temperature difference between the inside and outside of the particles, resulting in uneven melting of the plastic PP particles. The existing preheating device usually includes a conveyor belt system and a heating bin. The middle of the conveyor belt system passes through the heating bin. When working, the plastic PP particles (hereinafter referred to as materials) are placed on the conveyor belt from one end of the conveyor belt system. Next, the materials follow the conveyor belt into the heating bin to preheat the materials. Finally, the preheated materials are removed from the heating bin and fed into the sheet machine. However, the existing preheating device has the following problems when in use: During the material conveying process, the contact position between most materials and the conveyor belt remains unchanged, so the overall heating uniformity of the materials is poor, which easily causes uneven heating of the materials. Summary of the invention

[0004] Based on this, it is necessary to provide a raw material preheating device for plastic cups to solve the problem of poor overall heating uniformity of the material in view of the problems existing in the current preheating device.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A raw material preheating device for a plastic cup comprises:

[0007] A heating chamber, wherein a heating channel is formed inside the heating chamber, and the heating channel extends along a first direction;

[0008] A conveying mechanism, the conveying mechanism passes through the heating channel;

[0009] The conveying mechanism includes a frame, a driving wheel, a driven wheel, a conveyor belt and a guide assembly. The frame is arranged on the heating chamber, and both ends of the frame pass through the heating channel. The driving wheel is rotatably arranged at one end of the frame, and the driving wheel can rotate around its own axis. The driven wheel is rotatably arranged at the other end of the frame. The conveyor belt is transmission-connected with the driving wheel and the driven wheel. The guide assembly is arranged on the frame and located on the inner side of the conveyor belt.

[0010] The guide assembly is used to guide the conveyor belt so that the surface of the conveyor belt fluctuates and the positions of the peaks and troughs of the conveyor belt surface change alternately; the guide assembly includes a plurality of guide units, and the plurality of guide units are arranged on the frame at intervals along the first direction;

[0011] The guide unit comprises a central column and a cam, wherein the central column is rotatably arranged on the frame and can rotate around its own axis, and the cam is coaxially arranged outside the central column;

[0012] The cams corresponding to two adjacent guide units are arranged in opposite directions; the protruding height of the cams decreases from one end to the other end along the axis of the central column.

[0013] Preferably, the central columns corresponding to two adjacent guide units have opposite rotation directions.

[0014] Preferably, a gear is coaxially arranged on the same end of the central column corresponding to the plurality of guide units, and two adjacent gears are meshed with each other.

[0015] Preferably, a plurality of transmission tooth grooves are formed at equal intervals on the inner side surface of the conveyor belt, and a plurality of transmission teeth are formed at equal intervals in the circumferential direction on the outer circumferential surfaces of the driving wheel and the driven wheel, and the transmission teeth are meshed with the transmission tooth grooves.

[0016] Preferably, a first motor is provided on the frame, and an output end of the first motor is fixedly connected to the driving wheel.

[0017] Preferably, a feed port is provided at the upper portion of the heating bin, and the feed port is located above the conveyor belt and close to one end of the conveyor belt.

[0018] Preferably, a hot air circulation dryer is provided in the heating chamber, and the nozzle of the hot air circulation dryer faces the conveyor belt.

[0019] Preferably, support columns are provided at the four corners of the bottom of the heating chamber.

[0020] The beneficial effects of the present invention are:

[0021] The present invention is provided with a guide component. Since the guide component is arranged in the frame and located on the inner side of the conveyor belt, under the guiding action of the guide component, the surface of the conveyor belt fluctuates, and the positions of the peaks and troughs on the surface of the conveyor belt change alternately. Therefore, the material entering the heating channel continuously rolls and moves forward due to the fluctuation of the conveyor belt surface, thereby causing the contact position between the material and the conveyor belt to continuously change, so as to improve the temperature uniformity of the material and make the overall heating uniformity of the material better. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall schematic diagram of the present invention;

[0023] Figure 2 It is a front view of the present invention;

[0024] Figure 3 is a side view of the present invention;

[0025] Figure 4 for Figure 3 Middle AA section view;

[0026] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at B in the middle;

[0027] Figure 6 for Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0028] Figure 7 It is a schematic diagram of the cam structure in the present invention;

[0029] Figure 8 It is a cross-sectional view of the cam in the present invention.

[0030] in:

[0031] 100, heating chamber; 110, heating channel; 120, feed port;

[0032] 200, conveying mechanism; 210, frame; 220, driving wheel; 230, driven wheel; 240, conveyor belt; 250, guide assembly; 251, center column; 252, cam; 253, gear; 254, first motor;

[0033] 300. Hot air circulation dryer;

[0034] 400. Support column. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is 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 a limitation to the present invention.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] like Figures 1 to 8 As shown, a raw material preheating device for a plastic cup includes a heating chamber 100 and a conveying mechanism 200. A heating channel 110 is formed inside the heating chamber 100. The heating channel 110 extends along a first direction. The conveying mechanism 200 passes through the heating channel 110. The conveying mechanism 200 includes a frame 210, a driving wheel 220, a driven wheel 230, a conveyor belt 240 and a guide assembly 250. The frame 210 is arranged on the heating chamber 100, and both ends of the frame 210 pass through the heating channel 110. The driving wheel 220, the driven wheel 230, the conveyor belt 240 and the guide assembly 250. The wheel 220 is rotatably arranged at one end of the frame 210, the driving wheel 220 can rotate around its own axis, the driven wheel 230 is rotatably arranged at the other end of the frame 210, the conveyor belt 240 is transmission-connected with the driving wheel 220 and the driven wheel 230, the guide assembly 250 is arranged on the frame 210 and is located on the inner side of the conveyor belt 240, and the guide assembly 250 is used to guide the conveyor belt 240 so that the surface of the conveyor belt 240 is undulating and the peaks and troughs of the surface of the conveyor belt 240 are alternately changed.

[0039] It should also be noted that if Figure 4 As shown, a hot air circulation dryer 300 is disposed in the heating chamber 100 , and a nozzle of the hot air circulation dryer 300 faces the conveyor belt 240 , and is used to spray hot air into the heating channel 110 to preheat the material on the conveyor belt 240 .

[0040] It should also be noted that if Figure 4 As shown, a feed port 120 is provided at the upper portion of the heating bin 100 . The feed port 120 is located above the conveyor belt 240 and close to one end of the conveyor belt 240 . The feed port 120 is provided for introducing materials onto the conveyor belt 240 .

[0041] During use, the staff pours the material to be preheated onto the conveyor belt 240, and at the same time, makes the driving wheel 220 rotate around its own axis. Under the driving action of the driving wheel 220, the conveyor belt 240 is driven circumferentially, and the material to be preheated follows the conveyor belt 240 into the heating channel 110 for heating. Since the guide assembly 250 is arranged in the frame 210 and is located on the inner side of the conveyor belt 240, under the guiding action of the guide assembly 250, the material entering the heating channel 110 is continuously rolled and moved forward due to the ups and downs of the surface of the conveyor belt 240, so that the contact position between the material and the conveyor belt 240 is continuously changed, so as to improve the temperature uniformity of the material and make the overall heating uniformity of the material better. Moreover, since the peaks and troughs of the surface of the conveyor belt 240 are alternately changed, the material will be shaken into the air by the conveyor belt 240 during the rolling process, so that the conveyor belt 240 is fully in contact with the hot air, thereby improving the drying efficiency of the hot air on the material.

[0042] In this embodiment, if Figure 4-Figure 6 As shown, the guide assembly 250 includes a plurality of guide units, and the plurality of guide units are arranged on the frame 210 at intervals along a first direction. The guide units include a center column 251 and a cam 252. The center column 251 is rotatably arranged on the frame 210, and the center column 251 can rotate around its own axis. The cam 252 is coaxially arranged on the outside of the center column 251, and the cams 252 corresponding to two adjacent guide units are configured in opposite directions.

[0043] When the material is preheated, the center column 251 rotates around its own axis. At this time, the center column 251 drives the cam 252 to rotate synchronously. Under the action of the cam 252, the conveyor belt 240 is intermittently lifted by the cam 252, so that the surface of the conveyor belt 240 is undulating, and the peaks and troughs of the surface of the conveyor belt 240 are alternately changed, so that the contact position between the material and the conveyor belt 240 is constantly changed, so as to improve the temperature uniformity of the material and make the overall heating uniformity of the material better.

[0044] It should also be noted that, in order to drive the central column 251 to rotate, specifically, a driving motor can be arranged on the frame 210 so that the output end of the driving motor is coaxially fixedly connected to the central column 251 .

[0045] In this embodiment, if Figure 7 and Figure 8As shown, the protruding height of the cam 252 decreases along the axis of the center column 251 from one end to the other end.

[0046] This arrangement is to enable the material to roll along the width direction of the conveyor belt 240 under the action of its own gravity, so as to further increase the uniformity of contact between the material and the hot air, so as to further improve the temperature uniformity of the material and make the overall heating uniformity of the material better.

[0047] In this embodiment, the rotation directions of the central pillars 251 corresponding to two adjacent guide units are opposite.

[0048] Such a setting can slow down the moving speed of the material on the conveyor belt 240, so that the materials can contact each other when moving along the heating channel 110, so as to increase the mixing uniformity of the materials, thereby improving the temperature uniformity of the materials. In addition, it can also produce an effect similar to "stir-frying", further improving the mixing uniformity of the materials.

[0049] In this embodiment, a gear 253 is coaxially disposed on the same end of the central column 251 corresponding to the plurality of guide units, and two adjacent gears 253 mesh with each other.

[0050] Specifically, one of the gears 253 rotates around its own axis. At this time, since the two adjacent gears 253 are meshed with each other, the multiple center columns 251 all rotate around their own axes, and the rotation directions of the center columns 251 corresponding to the two adjacent guide units are opposite.

[0051] It should be additionally explained that, in order to make one of the gears 253 rotate around its own axis, specifically, a gear 253 is coaxially fixedly connected to the outside of the driving wheel 220 , and the gear 253 is meshed with the gears 253 corresponding to the other center column 251 .

[0052] In order to drive the driving wheel 220 to rotate circumferentially, specifically, a first motor 254 is provided on the frame 210 , and an output end of the first motor 254 is fixedly connected to the driving wheel 220 .

[0053] When in use, the first motor 254 is started, and the driving wheel 220 is driven to rotate by the first motor 254, and the driving wheel 220 drives the gear 253 connected thereto to rotate, and the gear 253 drives the gear 253 adjacent thereto to rotate, so that the gears 253 corresponding to all the center columns 251 are forced to rotate, so that the cams 252 corresponding to each center column 251 rotate synchronously, so that the conveyor belt 240 is intermittently lifted or lowered, so that the surface of the conveyor belt 240 is undulating, and because the cams 252 corresponding to two adjacent guide units are configured in opposite directions, the peaks and troughs on the surface of the conveyor belt 240 are alternately changed, so that the contact position between the material and the conveyor belt 240 is constantly changed, so as to improve the temperature uniformity of the material and make the overall heating uniformity of the material better.

[0054] In this embodiment, if Figure 5 and Figure 6 As shown, a plurality of transmission tooth grooves are formed at equal intervals on the inner side surface of the conveyor belt 240, and a plurality of transmission teeth are formed at equal intervals in the circumferential direction on the outer circumference surfaces of the driving wheel 220 and the driven wheel 230, and the transmission teeth and the transmission tooth grooves are meshed with each other.

[0055] The purpose of arranging the transmission tooth grooves and the transmission teeth is to increase the stability of the transmission and prevent the conveyor belt 240 from slipping.

[0056] In this embodiment, if Figure 1 As shown, support columns 400 are provided at the four corners of the bottom of the heating chamber 100 , and the support columns 400 are provided to support the heating chamber 100 .

[0057] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A raw material preheating device for plastic cups, characterized in that: include: A heating chamber, wherein a heating channel is formed inside the heating chamber, and the heating channel extends along a first direction; A conveying mechanism, the conveying mechanism passes through the heating channel; The conveying mechanism includes a frame, a driving wheel, a driven wheel, a conveyor belt and a guide assembly. The frame is arranged on the heating chamber, and both ends of the frame pass through the heating channel. The driving wheel is rotatably arranged at one end of the frame, and the driving wheel can rotate around its own axis. The driven wheel is rotatably arranged at the other end of the frame. The conveyor belt is transmission-connected with the driving wheel and the driven wheel. The guide assembly is arranged on the frame and located on the inner side of the conveyor belt. The guide assembly is used to guide the conveyor belt so that the surface of the conveyor belt fluctuates and the positions of the peaks and troughs of the conveyor belt surface change alternately; the guide assembly includes a plurality of guide units, and the plurality of guide units are arranged on the frame at intervals along the first direction; The guide unit comprises a central column and a cam, wherein the central column is rotatably arranged on the frame and can rotate around its own axis, and the cam is coaxially arranged outside the central column; The cams corresponding to two adjacent guide units are arranged in reverse order; The protruding height of the cam decreases from one end to the other end along the axis of the central column.

2. A raw material preheating device for plastic cups according to claim 1, characterized in that: The rotation directions of the central columns corresponding to two adjacent guide units are opposite.

3. The raw material preheating device for plastic cups according to claim 1, characterized in that: A gear is coaxially arranged on the same end of the central column corresponding to the plurality of guide units, and two adjacent gears are meshed with each other.

4. The raw material preheating device for plastic cups according to claim 1, characterized in that: The inner side surface of the conveyor belt is provided with a plurality of transmission tooth grooves at equal intervals, and the outer peripheral surfaces of the driving wheel and the driven wheel are provided with a plurality of transmission teeth at equal intervals in the circumferential direction, and the transmission teeth are meshed with the transmission tooth grooves.

5. The raw material preheating device for plastic cups according to claim 1, characterized in that: The frame is provided with a first motor, and an output end of the first motor is fixedly connected to the driving wheel.

6. The raw material preheating device for plastic cups according to claim 1, characterized in that: A feed port is provided on the upper portion of the heating bin, and the feed port is located above the conveyor belt and close to one end of the conveyor belt.

7. The raw material preheating device for plastic cups according to claim 1, characterized in that: A hot air circulation dryer is arranged in the heating chamber, and the nozzle of the hot air circulation dryer faces the conveyor belt.

8. The raw material preheating device for plastic cups according to claim 1, characterized in that: The four corners of the bottom of the heating chamber are provided with supporting columns.

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