Drying device for EPP production

Abstract

The utility model belongs to the technical field of foamed polypropylene preparation devices, and provides a drying device for EPP production, which comprises an air blowing device, a water absorption device, a water distribution box and an air pump, the air blowing device is positioned at the foremost end of the whole device, the bottom of the air blowing device is provided with an air outlet with a conical structure, and the top of the air blowing device is provided with a tubular interface connected with the air pump; the water suction device is located on the rear side of the air blowing device, the top of a box body of the water suction device is of a conical structure and provided with a plurality of groove through holes, the water distribution box is located between the water suction device and the air pump, communicated with the water suction device and the air pump and mainly used for discharging water flow after filament dewatering, and the air pump is mainly used for providing an air source for the air blowing device and the air suction device. According to the resin filament drying device, resin filaments can be dried in an air pressure mode through the air blowing device, the filaments can be further dried through negative pressure water absorption of the water absorption device, drying of the material filaments can be achieved on the premise that a drying oven is not used, and therefore the purposes of saving electric energy and reducing production cost are achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of foamed polypropylene preparation equipment, specifically relating to a drying device for EPP production. Background Technology

[0002] Expanded polypropylene (EPP) is a high-performance, highly crystalline polymer / gas composite material. With advancements in production technology, EPP materials of varying densities and pore sizes can be produced using different processes. These materials exhibit excellent shock absorption and thermal insulation properties, high recovery rate after deformation, good heat resistance, chemical corrosion resistance, and oil resistance, playing a vital role in packaging, automotive, and construction industries. Due to its recyclability and pollution-free production process, EPP is also known as a "green" foam material with broad application prospects. Given the intense market competition, how to reduce costs and increase efficiency in EPP material processing is a crucial issue that every practitioner in the field should pay close attention to and consider.

[0003] Currently, the manufacturing process of EPP parts consists of the following steps: extrusion granulation; foaming; and molding. The extrusion granulation process mainly includes: co-extrusion, water cooling of the material filaments, filament drying, pelletizing, sieving, drying, and packaging. After the EPP raw material and additives are co-extruded, the resin filaments are first cooled with water and then dried. Traditional drying methods often involve simply blowing away the surface moisture of the filaments and then using an oven for heating to dry the material. This consumes a lot of electricity and has low drying efficiency, increasing production costs. Therefore, an energy-efficient and high-efficiency filament drying equipment is needed. Utility Model Content

[0004] The purpose of this invention is to improve the drying effect, reduce production costs, and provide a drying device for EPP production.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A drying apparatus for EPP production includes:

[0007] The blower is located at the front of the whole device. It has a cone-shaped air outlet at the bottom, a tubular interface for connecting to the air pump at the top, and a fixed bracket installed on the side.

[0008] A water absorption device, located behind the blower, includes a housing. The top of the housing has a conical structure and several evenly distributed grooves and through holes. The sides and bottom of the housing are respectively provided with air intake and water outlet.

[0009] The water distribution tank is located between the water suction device and the air pump. It has a first connection port, a second connection port and a drain port on its side. The first connection port is connected to the air suction port of the water suction device through a pipe.

[0010] The air pump is connected to an air outlet pipe and an air inlet pipe. The other end of the air outlet pipe is connected to the tubular interface of the blower, and the other end of the air inlet pipe is connected to the second connection port of the water distribution tank.

[0011] Furthermore, a first guide rod is provided at intervals on the lower side of the air outlet of the blower. The surface of the first guide rod is provided with several guide grooves, and one end of the first guide rod is fixedly connected to the fixed bracket.

[0012] Furthermore, a support frame is fixed at each of the two ends of the upper side of the water absorption device, and a second guide rod with a smooth surface for combing the filaments is placed on the upper side of the two support frames.

[0013] Furthermore, a glass cover is installed on the top of the water absorption device via adjusting bolts, and a gap is reserved between the glass cover and the groove through hole.

[0014] Furthermore, a removable cover is installed on the front of the water absorption device's housing.

[0015] Furthermore, a vertical water distribution plate is installed inside the water distribution tank.

[0016] Furthermore, a first ball valve is installed at the tubular interface of the blower.

[0017] Furthermore, the drain outlet of the water distribution tank is located at the bottom side of the water distribution tank, and a second ball valve is installed on the outside of the drain outlet.

[0018] Furthermore, the drying device for EPP production also includes a dehydrator water receiving tray, which is a semi-enclosed hollow structure located at the bottom of the overall device, with two support legs fixed on one side of the bottom of the dehydrator water receiving tray.

[0019] Furthermore, a water receiving tube is placed on the inner side of the upper end of the water receiving tray of the dehydrator, and an adjustable lifting base is movably installed at the bottom of the water receiving tube.

[0020] Based on the above technical solutions, the beneficial effects of this utility model compared with the prior art are as follows:

[0021] The blowing device in this invention can dry resin filaments through air pressure at the bottom air outlet. Then, the resin filaments are evenly distributed in the groove at the top of the water absorption device, which will further dry the filaments by absorbing water under negative pressure. This allows for the drying of material filaments without the use of an oven, thereby saving electricity and reducing production costs.

[0022] This invention, by adjusting the installation positions of the blowing and suction devices (front blowing and rear suction), can further improve the drying of filaments without increasing the power of the air pump or other components. This reduces subsequent drying steps and lowers production costs. Attached Figure Description

[0023] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0024] Figure 1 This is a schematic diagram of the structure of the blower device provided by this utility model;

[0025] Figure 2 This is a schematic diagram of the water absorption device provided by this utility model;

[0026] Figure 3 This is a schematic diagram of the support frame provided by this utility model;

[0027] Figure 4 This is a schematic diagram of the groove through hole provided by this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the water distribution tank provided by this utility model;

[0029] Figure 6 This is a schematic diagram of the water receiving tray of the dehydrator provided in Embodiment 2 of this utility model;

[0030] Figure 7 This is a schematic diagram of the structure of the water receiving tube provided in Embodiment 2 of this utility model;

[0031] Figure 8 This is a schematic diagram of the fixed frame provided in Embodiment 3 of this utility model.

[0032] In the diagram: 1. Blowing device; 101. Air outlet; 102. Tubular interface; 103. Fixed bracket; 104. First guide rod; 2. Water suction device; 201. Box body; 202. Groove through hole; 203. Air inlet; 204. Water outlet; 205. Support frame; 206. Removable baffle; 3. Water distribution tank; 301. First connection port; 302. Second connection port; 303. First drain port; 4. Dehydrator water receiving tray; 5. Fixed frame. Detailed Implementation

[0033] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0034] Example 1:

[0035] like Figures 1 to 5 As shown, the drying device for EPP production provided in this embodiment of the utility model includes a blowing device 1, a water suction device 2, a water distribution tank 3, and a blower. The main installation method is that the blowing device 1 is located at the front end of the overall device, and the water suction device 2 is located behind the blowing device 1. The blower's main function is to provide airflow to the blowing and suction devices. The blower is connected to an outlet pipe and an inlet pipe. The tubular interface 102 on the side of the blowing device 1 is connected to the blower's outlet pipe via a transparent plastic pipe, and the blower provides power to the blowing device 1. The blower's inlet pipe is connected to the water distribution tank 3, and the water distribution tank 3 is connected to the suction port 203 of the water suction device 2 via a transparent plastic pipe. The blower is a common fan and is not shown in the figure.

[0036] The water distribution tank 3 is located between the water suction device 2 and the air pump. Its main function is to block the water in the water distribution tank 3 when the water suction device 2 is in normal use, so as to prevent the water from entering the air pump and affecting the normal use of the air pump and the blowing device 1.

[0037] like Figure 1 As shown, the blower device 1 has a conical air outlet 101 at the bottom and a tubular interface 102 at the top for connecting to a blower pump. A first ball valve 105 is installed at the tubular interface 102. A fixed bracket 103 is installed on the side of the blower device 1. First guide rods 104 are spaced apart below the air outlet 101. Several guide grooves are formed on the surface of the first guide rods 104. One end of the first guide rods 104 is fixedly connected to the fixed bracket 103.

[0038] Specifically, the air outlet 101 is a 663mm long conical blowing structure. The conical design is used to increase air pressure and improve drying efficiency. A 1100mm long fixed bracket 103 is welded to the side of the blowing device 1. The bottom of the fixed bracket 103 has multiple equidistantly distributed 12mm diameter holes for easy fixing with bolts. A 750mm long first guide rod 104 is installed at a 60mm interval from the conical air outlet 101. Its main function is to constrain the guide rod, ensuring that the distance between the guide rod and the air outlet of the blowing device is within 60mm.

[0039] The first preferred distance between the air outlet 101 and the filament is 60mm, and the second preferred distance is 70mm.

[0040] The first preferred number of teeth on the first guide rod 104 is 111, and the second preferred number of teeth is 101.

[0041] The first preferred depth of the guide wire groove is 2.6 to 3.0 mm, and the second preferred depth is 3.2 to 3.5 mm.

[0042] The first preferred spacing between the guide wire grooves is 3.2 mm, and the second preferred spacing is 4.2 mm.

[0043] The drying equipment of this invention can achieve a good drying effect in resin material filaments. In some cases, the particles after the filaments are granulated may adhere together due to electrostatic effects. Therefore, an adjustable ball valve is designed above the blowing device. By controlling the opening and closing of the ball valve, the drying effect of the blowing device can be adjusted.

[0044] like Figures 2 to 4 As shown, the water absorption device 2 includes a box 201. The top of the box 201 is a conical structure and has several evenly distributed grooves and through holes 202. The side and bottom of the box 201 are respectively provided with air intake 203 and water outlet 204.

[0045] Preferably, in this embodiment of the invention, the front of the box 201 is equipped with a detachable cover plate 206.

[0046] Specifically, the housing 201 of the water absorption device 2 is a hollow, closed cuboid structure measuring 750mm*250mm*150mm. A tubular air intake vent 203 with a diameter of 75mm is located on the side, connecting it to the water distribution tank 3. A fixing plate is welded to the bottom of the housing 201 for securing the water absorption device. The top of this structure is conical and contains numerous, evenly distributed grooves and through-holes 202. The size of each groove and through-hole 202 is 2–4mm, and the spacing between adjacent grooves and through-holes is 2–3mm. This ensures a sufficient number of grooves to fix the filaments, allowing them to be evenly distributed and guaranteeing the drying effect of the water absorption device 2.

[0047] The first preferred number of grooves in the through hole 202 is 109, the first preferred spacing is 3mm, and the first preferred groove width is 3.5mm. The second preferred number of grooves is 99, the second preferred spacing is 2mm, and the second preferred groove width is 4mm.

[0048] Preferably, to further improve the drying performance of the filaments, a glass cover plate is installed above the contact point between the filaments and the groove through-hole 202 using adjusting bolts. The glass cover plate is positioned 2-5 mm above the filaments, and the gap between the glass cover plate and the filaments can be adjusted using the adjusting bolts. The glass cover plate reduces the space required for the water absorption device 2 during operation, increases the negative pressure, and enhances the water absorption power, thereby improving the drying effect of the equipment without affecting filament arrangement and observation during production.

[0049] As a preferred option, such as Figure 3As shown, in this embodiment of the invention, support frames 205 are welded to both ends of the top of the housing 201 to accommodate the second guide rod, facilitating the combing of the filaments. The second guide rod has its guide groove removed and is designed as a smooth cylinder to reduce the friction between the filaments and the guide rod, thereby improving the stability of the filament operation.

[0050] Preferably, in this embodiment of the invention, a detachable baffle 206 is installed on the front of the housing 201. The detachable baffle 206 is a 150mm*50mm rectangular baffle and is connected to the water suction device by bolts. The main purpose is to remove the baffle when the equipment is malfunctioning, to observe the water level inside the water suction device, and to clean the scale inside the water suction device.

[0051] To further improve the scenario adaptability of this utility model, this utility model... Figure 2 The top conical structure of the water suction device is designed to be detachable, and the size of the conical structure can be adjusted according to different products and size specifications.

[0052] like Figure 5 As shown, the side of the water tank 3 is connected to a first connection port 301, a second connection port 302 and a first drain port 303. The first connection port 301 is connected to the air intake port 203 of the water suction device 2 through a pipe.

[0053] Specifically, the water distribution tank 3 is a hollow, semi-enclosed cuboid measuring 300*300*330mm. Two 75mm diameter tubular connection ports are located on its side, connecting to the air pump and the water suction device 2 respectively. The connection between the water distribution tank 3 and the water suction device 2 is primarily used for discharging water after the filaments have been dehydrated. A first drain outlet 303 is connected to the bottom side of the water distribution tank 3, and a second ball valve is installed for convenient control of the water volume inside the tank.

[0054] Preferably, in this embodiment of the invention, a water distribution tank 3 has a vertically topped water distribution plate installed inside, located between the water distribution port and the water inlet, and connected to the water distribution tank by welding. Its main function is to separate the air inlet and outlet, but the bottom of the water distribution tank allows for flow between the two, facilitating the normal operation of the drying equipment and preventing moisture from entering the air pump.

[0055] Example 2:

[0056] like Figure 6 As shown, based on Embodiment 1, in order to prevent water from splashing during the drying process of the filaments, causing the ground to become wet and workers to slip, this embodiment of the utility model adds a water receiving tray 4 for the dewatering machine, which is used to prevent water from spilling onto the ground during the operation of the blower.

[0057] The dewatering machine's water receiving tray 4 is a semi-enclosed hollow structure measuring 750*750*150mm, located at the bottom of the overall device. Two support legs 401 are fixed to one side of the bottom of the water receiving tray 4, and a 60mm diameter drain outlet with a valve is provided on the side. The support legs 401 are made of 40*40mm stainless steel angle iron, with a height of 10-20mm, ensuring a 10-20mm lateral drop during installation of the water receiving tray 4.

[0058] As a preferred option, such as Figure 7 As shown, in this embodiment of the present invention, a water receiving tube 402 is placed on the inner side of the upper end of the water receiving tray 4 of the dehydrator, and an adjustable lifting base 403 is movably installed at the bottom of the water receiving tube 402.

[0059] Water receiving tube 402 has an inner width of 350mm, an outer width of 380mm, an inner length of 730mm, an outer length of 760mm, and a height of 350mm. Adjustable lifting base 403 has a height of 50-150mm.

[0060] Preferably, the inside of the water receiving cylinder 402 has a slope on the side near the water suction fan (the slope can be selected according to the actual situation). The slope can increase the area to prevent water from splashing during the operation of the blower.

[0061] Example 3:

[0062] like Figure 8 As shown, based on Embodiments 1 and 2, a fixing frame 5 is provided in this embodiment to facilitate the fixing of various components. The first layer of the fixing frame 5 can be used to place the water distribution tank 3. When the water suction device 2 enters with excessive water, it will preferentially fill the space of the water distribution tank 3, playing a buffering role. The second layer is used to install the air pump, which is fixedly connected to the fixing frame 5 with bolts to isolate it from the water source. The third layer is used to place the dehydrator's water receiving tray 4, the position of which can be adjusted according to the actual situation. The blowing device 1 and the water suction device 2 are respectively installed on the front and rear sides of the fixing frame 5, and the air pump is installed at the middle end of the fixing frame 5.

[0063] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A drying apparatus for EPP production, characterized by ,Including: Blowing device, located at the front end of the overall device, the bottom has a conical structure of the air outlet, the top has a tubular interface connected to the pump, the side is installed with a fixed support; Water suction device, located at the rear side of the blowing device, including a box, the top of the box is a conical structure and is provided with a plurality of evenly distributed recessed through holes, the side and bottom of the box are respectively provided with a suction port and a water outlet; Water distribution box, located between the water suction device and the pump, the side is communicated with the first connecting port, the second connecting port and the first drain port, the first connecting port is communicated with the suction port of the water suction device through the pipeline; The pump is communicated with the air outlet pipeline and the air inlet pipeline, the other end of the air outlet pipeline is communicated with the tubular interface of the blowing device, and the other end of the air inlet pipeline is communicated with the second connecting port of the water distribution box.

2. The drying apparatus for EPP production according to claim 1, characterized in that The lower side of the air outlet of the blowing device is provided with a first guide rod, and a plurality of guide grooves are formed in the surface of the first guide rod.

3. The drying apparatus for EPP production according to claim 1, characterized in that, The upper side of the box of the water suction device is fixed with a support frame at both ends, and a second guide rod with smooth surface for combing the sliver is placed on the upper side of the two support frames.

4. The drying apparatus for EPP production according to claim 1, characterized in that The top of the box of the water suction device is provided with a glass cover plate through adjusting bolts, and a gap is reserved between the glass cover plate and the recessed through hole.

5. The drying apparatus for EPP production according to claim 1, characterized in that The front of the box of the water suction device is provided with a detachable shielding plate.

6. The drying apparatus for EPP production according to claim 1, characterized in that The inside of the water distribution box is provided with a vertical water distribution plate.

7. The drying apparatus for EPP production according to claim 1, characterized in that The tubular interface of the blowing device is provided with a first ball valve.

8. The drying apparatus for EPP production according to claim 1, characterized in that The first drain port of the water distribution box is located at the bottom of the side of the water distribution box, and a second ball valve is installed outside the first drain port.

9. The drying apparatus for EPP production according to claim 1, characterized in that It also includes a water collector of the dewatering machine, which is a semi-closed hollow structure and is arranged at the bottom of the overall device.

10. The drying apparatus for EPP production according to claim 9, characterized in that The bottom of the water collector of the dewatering machine is fixed with two supporting legs. The upper end of the water collector of the dewatering machine is placed with a water collecting cylinder, and the bottom of the water collecting cylinder is movably installed with an adjustable lifting base.

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