A mixing and melting device for plastic processing

Abstract

The invention discloses a mixing and melting device for plastic processing, which relates to the technical field of plastic processing production, including a machine body, a heating plate, a mixing mechanism and a temperature sensing component, and also includes a spiral tube, which is fitted and surrounded on the outside of the machine body and fixed; a cooling mechanism, the input end and the return end of which are respectively connected and fixed to the two pipe ends of the spiral tube, so as to absorb heat and flow out the cold flow introduced into the spiral tube to reduce the temperature of the machine body; the advantages of the invention are as follows: by using the spiral tube to wrap the outside of the machine body, the cooling mechanism is used to introduce a cold flow into the spiral tube to absorb heat from the surface of the machine body and then flow out, so as to reduce the temperature of the machine body, and the uniformity and efficiency of the cooling treatment are high; the set temperature sensing component adopts a plurality of groups of temperature sensors, which are arranged and distributed in sequence horizontally on the inside of the machine body toward the center of the machine body, so as to simultaneously detect the temperature changes of multiple different positions, and the detection accuracy is high, so as to control the cooling part to be quickly put into processing, and ensure the product quality during mixing.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing and production, and more specifically to a mixing and melting device for plastic processing. Background Art

[0002] The mixing and melting equipment used in material processing is mainly used to evenly mix different types of plastic raw materials or plastic raw materials with various additives (such as stabilizers, plasticizers, etc.) added, and melt them under heating conditions to facilitate subsequent molding processing. This type of equipment is crucial to ensuring the quality of the final product;

[0003] The existing equipment [such as the publication number: CN212266329U, a fully automatic granulator for preparing recycled plastics], wherein the "melting box; inner tank; stirring shaft; stirring motor; heating jacket; heat insulation layer; discharge funnel; discharge valve" form a melting device;

[0004] And [Publication (Announcement) No.: CN218139201U, an adjustable raw material melting device for processing and producing composite plastic woven bags];

[0005] For temperature control accuracy: In actual operation, in order to achieve the best material properties or meet specific process requirements (such as the preparation of certain modified plastics), it may be necessary to control the temperature very accurately, so a cooling system is required to achieve more precise temperature regulation to ensure that the material is in an ideal processing state;

[0006] And to prevent local overheating: Even if the overall setting is within a safe range, due to material characteristics, environmental factors and other reasons, some areas inside the equipment may still have local overheating, which will not only affect product quality, but may also lead to safety accidents in serious cases. Therefore, it is necessary to set up appropriate cooling measures to help evenly distribute heat and avoid the formation of hot spots;

[0007] The above-mentioned "adjustable raw material melting equipment for the processing and production of composite plastic woven bags" states: "The third drive motor works to drive the third rotating shaft to rotate, control the rotation of the fan blades, can extract the hot air inside the first shell, and can adjust the temperature to a certain extent. The temperature can be adjusted according to different raw materials." Cooling treatment can be performed, but this treatment method is too limited and has the disadvantages of low processing uniformity and efficiency. Summary of the invention

[0008] The purpose of the present invention is to solve the above technical problems and provide a mixing and melting device for plastic processing.

[0009] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0010] The present invention provides a mixing and melting device for plastic processing, comprising:

[0011] A machine body containing the mixed plastic to be melted;

[0012] A heating plate, fixedly mounted in the machine body, is used to melt the plastic of the machine body;

[0013] A mixing mechanism, fixed on the machine body, is used to mix the plastic when it is melted;

[0014] The temperature sensing component is fixed on the machine body and is used to sense the temperature inside the machine body;

[0015] It also includes a spiral tube, which is fitted around and fixed outside the body;

[0016] The cooling mechanism has an input end and a return end connected and fixed to the two ends of the spiral tube respectively, so as to allow cold flow into the spiral tube and absorb heat to flow out to reduce the temperature of the machine body;

[0017] The molten plastic covers the temperature-sensing component;

[0018] The temperature sensing component includes a plate shell fixedly installed in the body, and multiple groups of temperature sensors fixedly installed in the plate shell. The plate shell runs through the inside and outside of the body, and the sensing ends of the temperature sensors are fixed in the plate shell and pass out of the plate shell. The sensing ends of the multiple groups of temperature sensors corresponding to the multiple groups of sensing ends are horizontally arranged and distributed in sequence on the inside of the body toward the center of the body.

[0019] As a preferred technical solution of the present invention, a top cavity is provided between the body and the top of the molten plastic therein;

[0020] It also includes a pressure gauge, which is fixedly mounted on the top of the body, and the sensing end of the pressure gauge is connected to the top cavity to monitor the pressure of the top cavity;

[0021] The air pipe is fixedly mounted on the top of the machine body, and one end of the air pipe is connected to the top cavity, and a regulating valve is installed between the air pipes.

[0022] As a preferred technical solution of the present invention, it also includes a base frame fixedly mounted on the bottom end of the body, a feed pipe fixedly mounted on the top end of the body, a closing cover fixedly mounted on the feed pipe to open and close the feed pipe end, a discharge pipe fixedly mounted on the bottom end of the body, a discharge valve fixedly mounted between the discharge pipes, and a controller fixedly mounted on the base frame.

[0023] As a preferred technical solution of the present invention, the cooling mechanism includes a liquid storage tank, a pump fixedly mounted on the liquid storage tank, an upper suction pipe fixedly connected to the extraction end of the suction pump, an inlet pipe fixedly connected to the discharge end of the suction pump, an outlet pipe fixedly connected to the discharge end of the spiral tube, a return pipe with a pipe end portion extending into the liquid storage tank, a cooling component connected and fixed between the outlet pipe and the return pipe, a drain pipe connected and fixed at the bottom end of the liquid storage tank, a drain valve connected and fixed between the drain pipes, and several groups of legs fixedly mounted at the bottom end of the liquid storage tank, and the upper suction pipe portion extends into the liquid storage tank.

[0024] As a preferred technical solution of the present invention, the cooling assembly includes a heat sink fin, a heat sink pipe embedded and fixed in the heat sink fin, and a fan fixed to the outside of the heat sink fin, the outside of the fan is fixed to the liquid storage tank, and the blowing end of the fan faces the heat sink pipe.

[0025] As a preferred technical solution of the present invention, the plate shell includes an insulating shell for built-in installation of multiple groups of temperature sensors, and a wear-resistant and anti-sticking layer fixed to the outside of the insulating shell. The sensing end of the temperature sensor penetrates the insulating shell and the wear-resistant and anti-sticking layer at the same time, and the wear-resistant and anti-sticking layer penetrates the inside and outside of the machine body.

[0026] As a preferred technical solution of the present invention, the mixing mechanism includes a rotating driver fixedly mounted on the top of the machine body, a rotating rod whose rod end is fixed to the output end of the rotating driver, and multiple groups of stirring blades evenly fixed on the outside of the rotating rod. The rotating rod passes through the inside and outside of the top of the machine body and is rotatably connected to the machine body through a rotating member.

[0027] The beneficial effects of the present invention are as follows:

[0028] By using a spiral tube to wrap around the outside of the machine body, a cooling mechanism is used to pass cold flow into the spiral tube to absorb heat from the surface of the machine body and then flow out, so as to reduce the temperature of the machine body. The cooling treatment is highly uniform and efficient.

[0029] The temperature sensing component is equipped with multiple groups of temperature sensors which are arranged horizontally on the inside of the machine body toward the center of the machine body, so as to detect the temperature changes at multiple different positions at the same time. The detection accuracy is high, so as to control the cooling part to be quickly put into processing and ensure the product quality during mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 yes Figure 1 Schematic diagram of the local structure A.

[0032] Figure numerals: body -1, heating plate -2, mixing mechanism -3, temperature sensing component -4, spiral tube -5, cooling mechanism -6, pressure gauge -7, air pipe -8, base frame -9, feed pipe -10, closing cover -11, discharge pipe -12, discharge valve -13, controller -14, rotary drive -31, rotating rod -32, stirring blade -33, plate shell -41, temperature sensor -42, heat insulation shell -411, wear-resistant and anti-sticking layer -412, liquid storage tank -61, pump -62, upper pumping pipe -63, inlet pipe -64, outlet pipe -65, reflux pipe -66, cooling component -67, drain pipe -68, drain valve -69, support foot -610, heat dissipation fin -671, heat dissipation pipe -672, fan -673. DETAILED DESCRIPTION

[0033] like Figure 1~2 As shown, the present invention proposes: a mixing and melting device for plastic processing, comprising:

[0034] A machine body 1 containing plastic to be melted and mixed;

[0035] The bottom frame 9 fixedly mounted on the bottom end of the body 1 is used to support the body 1 to ensure stability when in use;

[0036] A feed pipe 10 is fixedly mounted on the top of the machine body 1, and a cover 11 is fixedly mounted on the feed pipe 10 to allow the feed pipe 10 to be opened and closed. The cover 11 is opened to put the mixed plastic to be melted into the feed pipe 10 and into the machine body 1.

[0037] The heating plate 2 is fixed in the body 1 and is used to melt the plastic of the body 1 (such as Figure 1 , the heating plates 2 are provided in multiple groups and are evenly distributed on the inner wall of the body 1 to improve the uniformity of heating);

[0038] The mixing mechanism 3 is fixed on the machine body 1 and is used to mix the plastic when it is melted. During the melting process of the plastic, the mixing mechanism is stirred at the same time to increase the heat transfer rate and make the heat transfer uniform.

[0039] The specific structure of the mixing mechanism 3 is as follows, and combined with the following Figure 1 As shown:

[0040] The mixing mechanism 3 includes a rotating driver 31 fixed to the top of the body 1 (the rotating driver 31 can be a servo motor, etc.), a rotating rod 32 with one rod end fixed to the output end of the rotating driver 31, and multiple groups of stirring blades 33 evenly fixed to the outside of the rotating rod 32, the rotating rod 32 passes through the inside and outside of the top of the body 1 and is rotatably connected to the body 1 through a rotating member (the rotating rod 32 passes through the center of the top of the body 1 and is connected and fixed to the output end of the bottom of the rotating driver 31, and the multiple groups of stirring blades 33 are evenly distributed on the rotating rod 32 from top to bottom and are in the body 1. When the rotating driver 31 is running, it can synchronously drive the multiple groups of stirring blades 33 to rotate, so as to stir the molten plastic);

[0041] The molten plastic covers the temperature sensing component 4, so that the temperature change in the molten mixed plastic can be detected;

[0042] The temperature sensing component 4 is fixed on the body 1 and is used to sense the temperature inside the body 1 to check whether the temperature inside the body 1 is too high. At the same time, the above-mentioned mixing mechanism 3 will not contact the temperature sensing component 4 during operation;

[0043] The specific structure of the temperature sensing component 4 is as follows, and combined with the following Figure 1 , 2 As shown:

[0044] The temperature sensing component 4 includes a plate shell 41 fixed in the body 1, and a plurality of temperature sensors 42 fixed in the plate shell 41 (the temperature sensor 42 is a K-type thermocouple or an E-type thermocouple, etc., the K-type thermocouple has good stability and accuracy, and the E-type thermocouple has a fast response speed to temperature changes);

[0045] The plate shell 41 penetrates the inside and outside of the machine body 1, and the sensing end of the temperature sensor 42 is fixed inside the plate shell 41 and passes outside the plate shell 41. The sensing ends of the multiple groups of temperature sensors 42 corresponding to the multiple groups of sensing ends are arranged and distributed in sequence on the inside of the machine body 1 horizontally toward the center of the machine body 1;

[0046] When the temperature sensing assembly 4 is used, multiple groups of temperature sensors 42 are evenly arranged from right to left inside the plate shell 41 to be close to the center of the body 1, that is, the position of the rotating rod 32, so that the temperature of multiple positions inside the body 1 can be detected with high detection accuracy (in this case, Figure 1 The interior of the body 1 is similar to a column shape, and the position of the rotating rod 32 is the position of the column axis. When the temperature after sensing is used in such a limited structure in conjunction with multiple groups of temperature sensors 42, the temperature detection of the entire molten mixed plastic is more accurate). The right end of the plate shell 41 is fixedly passed through the outside of the body 1, and the electrical connection line is used at the passing position. The position setting of the electrical connection line is relatively reasonable.

[0047] Furthermore, the plate shell 41 includes a heat-insulating shell 411 (the heat-insulating shell 411 is made of a non-heat-conducting material, which may be ceramic fiber, etc.) for internal installation of multiple groups of temperature sensors 42, and a wear-resistant and anti-sticking layer 412 (the wear-resistant and anti-sticking layer 412 may be a ceramic coating, etc.) fixed to the outside of the heat-insulating shell 411. The sensing end of the temperature sensor 42 penetrates the heat-insulating shell 411 and the wear-resistant and anti-sticking layer 412 at the same time, and the wear-resistant and anti-sticking layer 412 penetrates the inside and outside of the body 1. The heat-insulating shell 411 can reduce the heat conduction to the temperature sensor 42 to improve protection, and the wear-resistant and anti-sticking layer 412 can reduce the adhesion when contacting the molten mixed plastic.

[0048] The ceramic coating can be fixed on the surface of the plate shell 41 by spraying, physical or chemical vapor deposition, etc.;

[0049] It also includes a spiral tube 5, which is fitted around and fixed outside the body 1;

[0050] The cooling mechanism 6 has an input end and a return end connected and fixed to the two ends of the spiral tube 5, so as to absorb heat from the spiral tube 5 and reduce the temperature of the machine body 1;

[0051] By using the spiral tube 5 to wrap around the outer side of the body 1, a cold flow is passed into the spiral tube 5 by using the cooling mechanism 6 to absorb heat from the surface of the body 1 and then flow out, so as to reduce the temperature of the body 1, and the cooling process has high uniformity and efficiency;

[0052] At the same time, in combination with the temperature sensing component 4 set above, multiple groups of temperature sensors 42 are arranged horizontally on the inner side of the body 1 toward the center of the body 1 in sequence, so as to simultaneously detect the temperature changes of multiple different positions with high detection accuracy, so as to control the cooling part to be quickly put into processing and ensure the product quality during mixing;

[0053] The specific structure of the cooling mechanism 6 is as follows, and combined with the following Figure 1 As shown:

[0054] The cooling mechanism 6 includes a liquid storage tank 61 (the top of the liquid storage tank 61 is provided with an opening, and a blocking cover is provided on the opening. The blocking cover is opened to add a proper amount of cold flow liquid. The cold flow liquid is preferably silicone oil, etc. The boiling point of silicone oil is higher than that of water, etc., which is more suitable for passing into the spiral tube 5 and has good stability);

[0055] A pump 62 fixedly mounted on the liquid storage tank 61 (the pump 62 may be a gear pump, etc., and the use of a gear pump can facilitate accurate control of flow rate and pressure, etc.);

[0056] An upper suction pipe 63 connected and fixed to the extraction end of the suction pump 62, an inlet pipe 64 connected and fixed to the discharge end of the suction pump 62, an outlet pipe 65 connected and fixed to the discharge end of the spiral tube 5, and a return pipe 66 with one end extending partially into the liquid storage tank 61, and the return pipe 66 runs through the inside and outside of the top end of the liquid storage tank 61;

[0057] The cooling assembly 67 fixedly mounted between the outlet pipe 65 and the return pipe 66 is connected to accelerate the cooling efficiency, so as to improve the cooling effect during continuous use;

[0058] Connecting to the drain pipe 68 fixedly mounted on the bottom of the liquid storage tank 61, connecting to the drain valve 69 fixedly mounted between the drain pipe 68, and a plurality of groups of legs 610 fixedly mounted on the bottom of the liquid storage tank 61, the upper suction pipe 63 partially extends into the liquid storage tank 61, and the upper suction pipe 63 passes through the inner and outer sides of the top of the liquid storage tank 61;

[0059] When the cooling mechanism 6 is in use, when the temperature sensor 42 senses that the temperature is too high, the pump 62 is operated to generate suction in the inlet pipe 64, so that the cold fluid in the liquid storage tank 61 is pumped out to the upper pumping pipe 63 and flows downward from the upper end of the spiral tube 5 to the outlet pipe 65, and then flows back to the liquid storage tank 61 after being cooled by the cooling component 67;

[0060] Furthermore, the cooling assembly 67 includes a heat dissipation fin 671, a heat dissipation pipe 672 (the heat dissipation fin 671 and the heat dissipation pipe 672 may be made of aluminum alloy, etc.) embedded in the heat dissipation fin 671, and a fan 673 fixed to the outside of the heat dissipation fin 671. The outside of the fan 673 is fixed to the liquid storage tank 61. The blowing end of the fan 673 faces the heat dissipation pipe 672. The cold fluid after absorbing heat flows in the heat dissipation pipe 672. During the circulation process, the heat dissipation fin 671 absorbs the heat in the heat dissipation pipe 672 to dissipate heat. At the same time, the fan 673 blows toward the heat dissipation fin 671 and the heat dissipation pipe 672 to accelerate the heat dissipation effect.

[0061] like Figure 1 As shown:

[0062] A top cavity is provided between the body 1 and the top of the molten plastic therein (i.e., when the molten plastic is being melted, it is not completely filled, and at this time, there is a cavity at the top of the molten plastic in the body 1, which is the top cavity);

[0063] It also includes a pressure gauge 7 (the pressure gauge 7 is a pressure transmitter; and the model of the pressure transmitter can be: MIK-PX300, etc.), which is fixedly installed on the top of the body 1, and the sensing end of the pressure gauge 7 is connected to the top cavity for monitoring the pressure of the top cavity;

[0064] The air pipe 8 is fixedly mounted on the top of the machine body 1, and one end of the air pipe 8 is connected to the top cavity. A regulating valve (electric regulating valve) is installed between the air pipes 8. If the pressure is too high, the air pipe 8 can be vented by opening the regulating valve. The air pipe 8 can also discharge heat to help regulate the temperature when overheating occurs, which has good functionality.

[0065] A discharge pipe 12 fixedly mounted at the bottom of the machine body 1 and a discharge valve 13 (which may be an electric regulating valve) fixedly mounted between the discharge pipe 12. After the plastics are mixed and melted, the discharge valve 13 can be opened to discharge the plastics through the discharge pipe 12.

[0066] The controller 14 (the controller 14 is a PLC controller) fixedly mounted on the base frame 9 is connected to an external power source to connect and supply power to electrical components and equipment and control their use (control use such as starting and closing the pump 62, fan 673, regulating valve, etc.).

[0067] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0068] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0069] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A mixing and melting device for plastic processing, comprising: A body (1) containing the mixed plastic to be melted; A heating plate (2) is fixedly mounted in the machine body (1) and is used to melt the plastic of the machine body (1); A mixing mechanism (3) is fixedly mounted on the machine body (1) and is used to mix the plastic when it is melted; A temperature sensing component (4) is fixedly mounted on the machine body (1) and is used to sense the temperature inside the machine body (1); It is characterized in that It also includes a spiral tube (5) which fits around and is fixed to the outside of the body (1); The cooling mechanism (6) has an input end and a return end which are respectively connected and fixed to the two ends of the spiral tube (5) so as to allow a cold flow to flow into the spiral tube (5) and absorb heat to flow out, thereby lowering the temperature of the machine body (1); The molten plastic covers the temperature sensing component (4); The temperature sensing component (4) comprises a plate shell (41) fixedly mounted inside the body (1), and a plurality of groups of temperature sensors (42) fixedly mounted inside the plate shell (41); the plate shell (41) penetrates the inside and outside of the body (1); sensing ends of the temperature sensors (42) are fixed inside the plate shell (41) and pass outside the plate shell (41); and the sensing ends of the plurality of groups of temperature sensors (42) corresponding to the plurality of groups of sensing ends are arranged in sequence horizontally on the inside of the body (1) toward the center of the body (1); The cooling mechanism (6) comprises a liquid storage tank (61), a pump (62) fixedly mounted on the liquid storage tank (61), an upper pumping pipe (63) connected and fixedly connected to the extraction end of the pump (62), an inlet pipe (64) connected and fixedly connected to the discharge end of the pump (62), an outlet pipe (65) connected and fixedly connected to the discharge end of the spiral tube (5), a return pipe (66) with a pipe end portion extending into the liquid storage tank (61), a cooling assembly (67) connected and fixedly mounted between the outlet pipe (65) and the return pipe (66), a discharge pipe (68) connected and fixedly mounted on the bottom end of the liquid storage tank (61), a discharge valve (69) connected and fixedly mounted between the discharge pipes (68), and a plurality of groups of legs (610) fixedly mounted on the bottom end of the liquid storage tank (61), the upper pumping pipe (63) partially extending into the liquid storage tank (61), and a cold flow liquid is provided in the liquid storage tank (61), and the cold flow liquid is silicone oil; The cooling assembly (67) comprises a heat dissipation fin (671), a heat dissipation pipe (672) embedded and fixed in the heat dissipation fin (671), and a fan (673) fixedly mounted on the outside of the heat dissipation fin (671), wherein the outside of the fan (673) is fixed to the liquid storage tank (61), and the blowing end of the fan (673) faces the heat dissipation pipe (672); The plate shell (41) comprises a heat-insulating shell (411) in which a plurality of groups of temperature sensors (42) are installed, and a wear-resistant and anti-sticking layer (412) fixedly mounted on the outside of the heat-insulating shell (411); the sensing end of the temperature sensor (42) penetrates both the heat-insulating shell (411) and the wear-resistant and anti-sticking layer (412); the wear-resistant and anti-sticking layer (412) penetrates the inside and outside of the machine body (1); and the heat-insulating shell (411) is made of ceramic fiber.

2. A mixing and melting equipment for plastic processing according to claim 1, characterized in that: A top cavity is provided inside the machine body (1) and between the top end of the molten plastic inside the machine body (1); It also includes a pressure gauge (7) fixedly mounted on the top of the body (1), and a sensing end of the pressure gauge (7) is connected to the top cavity for monitoring the pressure of the top cavity; The air pipe (8) is fixedly mounted on the top of the machine body (1), and one end of the air pipe (8) is connected to the top cavity. A regulating valve is installed between the air pipes (8).

3. A mixing and melting equipment for plastic processing according to claim 1, characterized in that: It also includes a bottom frame (9) fixedly mounted on the bottom end of the machine body (1), a feed pipe (10) fixedly mounted on the top end of the machine body (1), a cover (11) fixedly mounted on the feed pipe (10) to open and close the feed pipe end, a discharge pipe (12) fixedly mounted on the bottom end of the machine body (1), a discharge valve (13) fixedly mounted between the discharge pipes (12), and a controller (14) fixedly mounted on the bottom frame (9).

4. A mixing and melting equipment for plastic processing according to claim 1, characterized in that: The mixing mechanism (3) comprises a rotary driver (31) fixedly mounted on the top of the machine body (1), a rotating rod (32) whose rod end is fixed to the output end of the rotary driver (31), and a plurality of groups of stirring blades (33) evenly fixedly mounted on the outside of the rotating rod (32). The rotating rod (32) penetrates the inside and outside of the top of the machine body (1) and is rotatably connected to the machine body (1) via a rotating member.

Images