An automated dip-molding apparatus

Abstract

The application relates to the technical field of plastic dipping equipment, in particular to automatic plastic dipping equipment. The application comprises a front furnace, a plastic dipping pool and a rear furnace arranged in sequence along a processing direction, wherein a heating mechanism is arranged in the front furnace; a conveying mechanism is arranged above the plastic dipping pool; the conveying mechanism comprises a support, a conveying belt installed on the top of the support and a motor for driving the conveying belt; a suspension assembly is arranged at the bottom of the conveying belt; the suspension assembly comprises a first connecting rod connected with the conveying belt, a telescopic rod in sliding connection with the bottom of the first connecting rod, a second connecting rod connected with the bottom of the telescopic rod and a connecting buckle installed at the bottom of the second connecting rod; the connecting buckle is used for suspending a workpiece; and the workpiece can be fully dipped at the position in contact with the suspension assembly without turning over.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic dipping equipment, and specifically relates to an automatic plastic dipping equipment. BACKGROUND

[0002] Plastic dipping is a process in which a preheated metal workpiece is dipped into a plastic dipping tank containing plastic powder at high temperature, and the plastic powder adheres uniformly to the surface of the workpiece, and then the powder is melted and leveled by heating, and a continuous and dense plastic coating is formed after cooling.

[0003] The patent with the application number CN201610415638.0 provides a horizontal overturning full-automatic plastic dipping equipment, which comprises a front furnace and a rear furnace, a plastic dipping tank is arranged between the front furnace and the rear furnace, the front furnace comprises a front furnace heating mechanism, a front furnace disc rack entering mechanism is arranged at the front end of the front furnace heating mechanism, a front furnace disc rack leaving mechanism is arranged at the rear end of the front furnace heating mechanism, a front furnace conveying mechanism is arranged in the front furnace heating mechanism, the rear furnace comprises a rear furnace heating mechanism, a rear furnace disc rack entering mechanism is arranged at the front end of the rear furnace heating mechanism, a rear furnace disc rack leaving mechanism is arranged at the rear end of the rear furnace heating mechanism, a rear furnace overturning mechanism, a overturning area disc rack leaving mechanism and a rear furnace conveying mechanism are arranged in the rear furnace heating mechanism. The equipment has the advantages of simple structure, stable operation, full automation of product plastic dipping and high work efficiency.

[0004] However, the patent needs to turn over the workpiece to fully dip, and the efficiency is low.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. SUMMARY

[0006] The present application aims to provide an automatic plastic dipping equipment which can effectively solve the above-mentioned technical problems.

[0007] In order to achieve the purpose of the present application, the following technical solutions are adopted:

[0008] An automatic plastic dipping equipment comprises a front furnace, a plastic dipping tank and a rear furnace arranged in sequence along a processing direction, and a heating mechanism is arranged in the front furnace, characterized in that a conveying mechanism is arranged above the plastic dipping tank.

[0009] The conveying mechanism comprises a support, a conveying belt mounted on the top of the support and a motor for driving the conveying belt.

[0010] The bottom of the conveying belt is provided with a hanging assembly, and the hanging assembly comprises a first connecting rod connected with the conveying belt, a telescopic rod in sliding connection with the bottom of the first connecting rod, a second connecting rod connected with the bottom of the telescopic rod, and a connecting buckle mounted on the bottom of the second connecting rod, and the connecting buckle is used for hanging the workpiece.

[0011] Further, a sliding groove is arranged on the top of the second connecting rod, the length of the sliding groove is longer than the width of the telescopic rod, so that the second connecting rod and the telescopic rod can slide relative to each other; the first spring is connected between the sliding groove and the second connecting rod.

[0012] Further, the telescopic rod comprises an upper connecting part, a lower connecting part slidably connected with the upper connecting part, and a second spring connected with the upper connecting part and the lower connecting part respectively.

[0013] Further, the top of the plastic dipping tank is further provided with a fluctuation guide for limiting the suspension assembly, the fluctuation guide comprises a main body part and a guide groove arranged on the main body part.

[0014] Further, the main body part is composed of a lower wave segment with a small wave shape, an upper wave segment with an arc shape, and a horizontal material segment.

[0015] Further, the guide groove is composed of a wave-shaped fluctuation segment with a corrugated shape and a straight line groove.

[0016] Further, the upper connecting part passes through the guide groove from top to bottom, and the lower connecting part is located on the lower side of the guide groove.

[0017] Further, the rear furnace is provided with an air guide fan on one side, and the rear furnace and the conveying belt are provided with a fan blade.

[0018] Further, the bottom of the rear furnace is provided with a filter screen.

[0019] Compared with the prior art, the present application has the following beneficial effects: the present application can fully dip the position of the workpiece contacted with the suspension assembly without turning over the workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments thereof, and explain the principles of the present application, and do not constitute a limitation of the present application.

[0021] Figure 1 It is a structural schematic view of an automatic plastic dipping equipment of the present application;

[0022] Figure 2 It is a schematic view of an automatic plastic dipping equipment of the present application;

[0023] Figure 3 It is a schematic view of a fluctuation guide of an automatic plastic dipping equipment of the present application;

[0024] Figure 4 It is a structural schematic view of a fluctuation guide of an automatic plastic dipping equipment of the present application;

[0025] Figure 5 A schematic view of a hanging assembly structure of an automatic dipping equipment of the present application;

[0026] Figure 6 A schematic view of a motor of an automatic dipping equipment of the present application;

[0027] Figure 7 A schematic view of a heating mechanism of an automatic dipping equipment of the present application;

[0028] Figure 8 A schematic view of a rear furnace of an automatic dipping equipment of the present application.

[0029] In the figure: 1, front furnace; 2, dipping pool; 3, rear furnace; 11, heating mechanism; 4, conveying mechanism; 41, support cross beam; 42, conveying belt; 43, tensioning roller; 44, mounting plate; 45, motor; 46, driving gear; 47, driven gear; 48, transmission chain; 49, hanging assembly; 5, undulating guide; 51, guide groove; 52, lower wave section; 53, upper wave section; 54, connecting plate; 55, third connecting rod; 56, main body part; 57, blanking section; 491, first connecting rod; 492, telescopic rod; 493, second connecting rod; 494, connecting buckle; 495, first spring; 4921, upper connecting part; 4922, lower connecting part; 511, swinging section; 512, straight groove; 31, air blower; 32, fan blade; 33, brushless motor; 34, filter screen. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the technical scheme in the embodiments of the present application to make a clear and complete description, obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments.

[0031] In the description of the present application, it should be understood that the terms "center", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application. When a component is referred to as "fixed to" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there can be a middle component. When a component is referred to as "disposed on" another component, it can be directly disposed on the other component or there can be a middle component. The terms "vertical", "horizontal", "left", "right" and the like used herein are only for illustrative purposes.

[0032] As shown in Figures 1 to 8 The present application is an automatic plastic dipping device, which comprises a front furnace 1, a dipping pool 2 and a rear furnace 3 arranged in sequence along the processing direction; the inside of the front furnace 1 is provided with a heating mechanism 11 for preheating the workpiece; the workpiece is heated to an appropriate temperature by the heating mechanism 11, which facilitates the uniform adhesion of plastic powder on the surface of the workpiece.

[0033] The inside of the dipping pool 2 contains plastic powder, which is blown upward from the bottom of the dipping pool 2 by a blower, promoting the fluidization of the plastic powder under the action of the airflow. The uniform coating of the powder is achieved through the gas-solid two-phase fluidization. When compressed air penetrates the plastic powder layer upward at a critical speed through the perforated distribution plate, the inter-particle friction is offset by the aerodynamic force, and the powder exhibits fluid-like properties. At this time, the powder has fluidity, uniform heat conduction and surface activation. This fluidization process enables the plastic powder to better adhere to the surface of the workpiece, ensuring the uniformity and quality of the dipping coating. During the fluidization process, the airflow velocity needs to be strictly controlled between the minimum fluidization velocity and the terminal settling velocity, and the operating gas velocity is 1.5-2.5 Umf. Within this range, the gas-solid system forms a dynamic balance.

[0034] The rear furnace 3 is used for curing the workpiece coated with plastic powder, ensuring that the coating reaches the required hardness and durability.

[0035] The rear furnace 3 is provided with a filter screen 34 near the bottom, and the rear furnace 3 is provided with an air guide fan 31 on one side, and the air inlet of the air guide fan 31 is located below the filter screen 34, which is used to remove the excess hot steam and dust in the furnace; the rear furnace 3 and the conveying belt 42 are provided with a fan blade 32, which is driven by a brushless motor 33 and can blow the plastic parts after immersion from top to bottom; the blowing process not only accelerates the cooling of the workpiece and ensures that the solidification speed is moderate, but also blows the plastic powder attached to the surface of the workpiece into the rear furnace 3 through the action of the airflow; this process not only helps to reduce the accumulation of plastic powder on the surface of the workpiece, but also collects the blown powder into the air guide fan 31, avoiding environmental pollution and improving the efficiency of subsequent recycling; optionally, a spraying system can be provided on the rear furnace 3 to spray water towards the rear furnace 3, mix with air and plastic powder to avoid explosion of the plastic powder.

[0036] The air guide fan 31 guides the airflow to further guide the blown powder into the collection system, realizing effective recovery and treatment of the plastic powder and improving the environmental protection and resource utilization of the entire process.

[0037] The upper part of the plastic dipping tank 2 is provided with a conveying mechanism 4, which includes a support composed of a vertical column and a support beam 41 installed transversely on the top of the vertical column; a plurality of rollers are installed on the support beam 41 in the longitudinal direction to form a conveying path, and a conveying belt 42 is installed on the rollers to support and guide the movement of the conveying belt 42; two support beams 41 are respectively installed with mounting plates 44 on the sides away from each other, mounting holes are formed on the mounting plates 44, and bearings are installed in the mounting holes; a driving roller is coaxially connected in the bearing, and the driving roller is in close contact with the inner side of the conveying belt 42 to drive the movement of the conveying belt 42.

[0038] The driving roller is installed on the bearing through its rotating shaft, and the rotating shaft is coaxially connected with a driven gear 47; the driven gear 47 is in transmission connection with a driving gear 46 through a transmission chain 48, and the driving gear 46 is installed on the output end of a motor 45; when the motor 45 is started, the output end of the motor 45 drives the driving gear 46 to rotate, the driving gear 46 drives the driven gear 47 to rotate through the transmission chain 48, and the driven gear 47 drives the driving roller to rotate, thereby driving the conveying belt 42 connected with the driving roller to continuously run along the predetermined path.

[0039] The bottom of the mounting plate 44 is also provided with a waist hole, which is located above the conveyor belt 42. A tension roller 43 is installed inside the waist hole, and the tension roller 43 is used to tension and limit the conveyor belt 42. Adjusting blocks are installed on the opposite sides of the two mounting plates 44, and adjusting components are rotatably mounted on the adjusting blocks. The other end of the adjusting component is connected to the tension roller 43, used to adjust the position of the tension roller 43, thereby changing the tension of the conveyor belt 42. The adjusting component consists of two rotating shafts connected by a threaded connection, which are bolted together. When the user needs to adjust the tension roller 43, they can use a wrench to turn the bolts, adjusting the tightness of the bolts to move the two rotating shafts closer or further apart, thus adjusting the tension roller 43.

[0040] A suspension assembly 49 is provided at the bottom of the conveyor belt 42. The suspension assembly 49 includes: a first connecting rod 491 connected to the conveyor belt 42; a telescopic rod 492 slidably connected to the bottom of the first connecting rod 491; a second connecting rod 493 connected to the bottom of the telescopic rod 492; a connecting buckle 494 is fixedly installed at the bottom of the second connecting rod 493. The connecting buckle 494 is used to suspend workpieces. In this embodiment, multiple workpieces are suspended on a metal rod, and then the metal rod is inserted into the connecting buckle 494. Then, the metal rod is tightened with bolts or fastened to the connecting buckle 494 through a lock, thereby suspending the workpieces on the connecting buckle 494. The metal rod is a common metal rod. A groove is provided at the top of the second connecting rod 493. The length of the groove is longer than the width of the telescopic rod 492, so that the second connecting rod 493 and the telescopic rod 492 can slide slightly relative to each other. A first spring 495 is connected between the groove and the second connecting rod 493.

[0041] The telescopic rod 492 includes: an upper connecting part 4921, a lower connecting part 4922 slidably connected to the upper connecting part 4921, and a second spring connected to the upper connecting part 4921 and the lower connecting part 4922 respectively. The second spring is used to bring the upper connecting part 4921 and the lower connecting part 4922 closer to each other. The upper connecting part 4921 is cylindrical. The lower connecting part 4922 is cuboid, which facilitates the installation of the limiting structure and allows the lower connecting part 4922 to fit with the wave guide 5. The lower connecting part 4922 has a vertically opening connecting groove that matches the upper connecting part 4921. A soft pad can be hinged to the side of the lower connecting part 4922 near the upper connecting part 4921.

[0042] The top of the immersion tank 2 is also provided with a wave guide 5 for guiding the suspension assembly 49; the wave guide 5 includes: a main body 56, a guide groove 51 formed in the main body 56; a connecting plate 54 installed on the outside of the main body 56, the connecting plate 54 being connected to the support beam 41; and a third connecting rod 55 installed at one end of the main body 56, the third connecting rod 55 being used to limit the main body 56.

[0043] The main body 56 is composed of a small wave-shaped lower wave section 52, an arc-shaped upper wave section 53, and a horizontally arranged unloading section 57; the guide groove 51 is composed of a corrugated wave swing section 511 and a straight groove 512; the upper connecting part 4921 passes through the guide groove 51 from top to bottom, and the lower connecting part 4922 is located on the lower side of the guide groove 51.

[0044] When the conveyor belt 42 is working, it drives the suspension assembly 49 to move laterally along with the conveyor belt 42, thereby driving the workpiece to move laterally from the loading end of the dip coating tank 2 to the unloading end of the dip coating tank 2.

[0045] During this process, the upper connecting part 4921 will intermittently swing longitudinally along the path of the guide groove 51, thereby causing the workpiece to swing longitudinally as well, so as to avoid the part of the workpiece that is in contact with the connecting buckle 494 not being fully dipped in plastic, thus covering the dipped blind area.

[0046] Meanwhile, when the lower connecting part 4922 passes through the lower band 52, it will move downward intermittently, thereby causing the workpiece to swing up and down, which can effectively break up powder agglomerates and promote the uniform distribution of fluidized bed powder.

[0047] By combining lateral and vertical swinging, excess powder can be shaken off, avoiding uneven coating thickness. It can also change the contact area between the workpiece and the connecting buckle 494 in real time, eliminating coating defects at the contact point. Furthermore, it can shake off unmelted particles from the workpiece surface in real time, ensuring the smoothness of the coating surface.

[0048] As the lower connecting part 4922 continues to move past the upper wave 53, the second spring causes the lower connecting part 4922 to bounce upward, thereby causing the workpiece to bounce upward. During the continuous up-and-down shaking process, the second spring intensifies the shaking of the workpiece. The flexible buffer of the second spring can also reduce the risk of workpiece collision damage.

[0049] During the lateral movement of the suspension assembly 49, it intermittently drives the longitudinal swing and the up-and-down swing. On the one hand, the plastic powder can be evenly coated on the surface of the workpiece. On the other hand, it can intermittently change the relative position between the workpiece and the connecting buckle 494 to prevent the same position from being covered for a long time, so that the plastic powder can be fully coated and avoid the problem of the contact position not being able to be dipped. It can also shake off the plastic powder on the surface of the workpiece, so that the excess plastic powder falls off the workpiece.

[0050] Due to the action of the first spring 495 and the second spring, the workpiece vibrates, thereby further reducing the adhesion of plastic powder, making it easier for the plastic powder to fall into the immersion tank 2 for collection, reducing the frequency of manual cleaning and reducing powder dust pollution.

[0051] When the suspension assembly 49 moves to the unloading section 57, the workpiece is above the rear furnace 3; at this time, the fan blades 32 blow air onto the workpiece, and at the same time, the induced draft fan 31 draws in air, sucking the plastic powder into the rear furnace 3 for collection.

[0052] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0053] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An automated dip molding apparatus comprising: A front furnace, a plastic dipping pool and a rear furnace are arranged in sequence along a processing direction, and a heating mechanism is arranged in the front furnace; characterized in that a conveying mechanism is arranged above the plastic dipping pool; The conveying mechanism comprises a support, a conveying belt mounted on the top of the support, and a motor for driving the conveying belt; The bottom of the conveying belt is provided with a suspension assembly; the suspension assembly comprises a first connecting rod connected with the conveying belt, an extension rod in sliding connection with the bottom of the first connecting rod, a second connecting rod connected with the bottom of the extension rod, and a connecting buckle mounted on the bottom of the second connecting rod and used for suspending a workpiece; The top of the second connecting rod is provided with a sliding groove, the length of the sliding groove is longer than the width of the extension rod, so that the second connecting rod and the extension rod can slide relative to each other; a first spring is connected between the sliding groove and the second connecting rod; The extension rod comprises an upper connecting portion, a lower connecting portion in sliding connection with the upper connecting portion, and a second spring connected with the upper connecting portion and the lower connecting portion respectively; The top of the plastic dipping pool is further provided with a fluctuation guide for limiting the suspension assembly; the fluctuation guide comprises a main body portion mounted on the support, and a guide groove formed in the main body portion; The main body portion comprises a lower wave segment in a small wave shape, an upper wave segment in an arc shape, and a horizontal discharge segment; The guide groove comprises a wave-shaped fluctuation segment in a wave shape and a straight line groove; The upper connecting portion passes through the guide groove from top to bottom, and the lower connecting portion is located on the lower side of the guide groove.

2. An automated dip molding apparatus as defined in claim 1, wherein One side of the rear furnace is provided with an air blower; a fan blade is arranged between the rear furnace and the conveying belt.

3. An automated dip molding apparatus as defined in claim 2, wherein The bottom of the rear furnace is provided with a filter screen.

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