Energy-saving structure for heating and heat insulation of injection molding machine cylinder

Abstract

The utility model provides a kind of heating and heat insulation energy-saving structure of injection molding machine cylinder, belong to injection molding equipment energy-saving technical field, including cylinder body, the periphery of cylinder body is provided with the segmented heating assembly for realizing the segmented accurate temperature control of cylinder body, the periphery of segmented heating assembly is provided with the composite heat insulation component for blocking heat loss, reducing energy consumption.The utility model is provided with segmented heating assembly, realizes the segmented independent temperature control of cylinder body, relies on heat-conducting silica gel pad to eliminate thermal resistance, cooperates temperature sensor to achieve gradient accurate temperature control, adapts the differentiated temperature demand of different stages of raw material, improves energy-saving efficiency;By setting composite heat insulation component, lock temperature using the double-layer structure of aluminum foil reflecting layer and aerogel insulation cotton, combined with fiberglass cloth outer layer protection and magic tape quick-release design, block heat loss of segmented heating assembly, guarantee temperature control independence, further improve the overall energy-saving efficiency of equipment.

Description

Technical Field

[0001] This utility model relates to the field of energy-saving technology for injection molding equipment, and more specifically, to a heating and heat insulation energy-saving structure for the barrel of an injection molding machine. Background Technology

[0002] The barrel heating system of an injection molding machine is a core component of injection molding. It has undergone technological upgrades from traditional resistance wire contact heating to electromagnetic induction heating. Although the thermal efficiency has been significantly improved, there is still room for optimization in energy saving and temperature control accuracy. With the upgrading of industrial energy-saving requirements, the precision of barrel heating and the efficiency of heat insulation have become the focus of industry attention.

[0003] A search revealed that Chinese patent CN201970454U discloses "an energy-saving barrel for injection molding machines, which achieves energy saving by changing the form of temperature transfer. Based on the principle of heat pipes, the traditional barrel structure of injection molding machines is changed to a double-layer structure with a vacuum in the middle and a heat transfer medium. This energy-saving barrel uses a resistance heating coil or an electromagnetic heating coil to heat the outer layer of the barrel, and the heat is introduced into the second layer of the barrel wall, that is, the inner wall in contact with the injection molding material, through the middle heat transfer medium to achieve the purpose of melting plastic particles. The reason why this new barrel is energy-saving is that it utilizes the isothermal characteristics and fast heat transfer characteristics of heat pipes, changing the dispersed heating of traditional barrels to concentrated heating, reducing heat loss and saving energy." However, the following defects still exist:

[0004] (1) In actual use, the device adopts a centralized heating method, which cannot independently control the temperature of the barrel in stages. It is difficult to adapt to the different temperature requirements of the raw materials at different melting stages, which can easily cause uneven heating and local thermal degradation of the raw materials, affecting the molding quality of injection molded products. At the same time, there is ineffective heating, which leads to energy waste.

[0005] (2) In actual use, the device relies on a double-layer vacuum structure for heat insulation, which is a single type of insulation. Heat is still easily lost from the joints of the heating components. Moreover, the vacuum structure is difficult to disassemble and maintain, making it impossible to perform rapid maintenance and ensuring long-term stable heat insulation and energy-saving effects. Therefore, a heating and heat insulation energy-saving structure for the injection molding machine barrel is proposed. Utility Model Content

[0006] The purpose of this invention is to address the problems of existing heating and insulation energy-saving structures for injection molding machine barrels. These structures employ centralized heating, which fails to provide independent temperature control of the barrel in stages, making it difficult to adapt to the varying temperature requirements of different melting stages of the raw materials. This leads to uneven heating and localized thermal degradation of the raw materials, affecting the molding quality of the injection molded products. Furthermore, ineffective heating results in energy waste. The invention also relies on a double-layer vacuum insulation structure, which offers limited insulation options and allows heat to easily dissipate from the joints of the heating components. Additionally, the vacuum structure is difficult to disassemble and maintain, hindering rapid repairs and making it difficult to guarantee long-term stable energy-saving insulation. Therefore, this invention provides a heating and insulation energy-saving structure for injection molding machine barrels to solve these problems.

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0008] The present invention is as follows: a heating and heat insulation energy-saving structure for injection molding machine barrel, including a barrel body, a segmented heating component for achieving precise segmented temperature control of the barrel body is provided on the periphery of the barrel body, a composite heat insulation component for blocking heat loss and reducing energy consumption is provided on the periphery of the segmented heating component, and a control component for regulating the operating status of the equipment is provided on the segmented heating component.

[0009] The segmented heating assembly includes three heating sleeves arranged axially along the periphery of the barrel body. Electromagnetic heating coils are embedded in the inner walls of the three heating sleeves. Thermally conductive silicone pads are fixedly installed on the inner periphery of each heating sleeve, and these pads are in close contact with the outer wall of the barrel body. A temperature sensing cavity is formed inside each heating sleeve, and a temperature sensor is fixedly installed inside the temperature sensing cavity. Connecting flanges are fixedly installed at both ends of each heating sleeve, and these connecting flanges are bolted to the connecting flanges of adjacent heating sleeves. The three heating sleeves correspond to the feeding section, melting section, and discharging section of the barrel body, respectively, and can be independently started / stopped and have their power adjusted.

[0010] As a preferred technical solution of this utility model, the composite heat insulation component includes a heat insulation cover wrapped around the outer periphery of the heating sleeve. Two Velcro straps are fixedly installed on the surface of the heat insulation cover. A Velcro patch is fixedly installed on the side of the heat insulation cover away from the Velcro straps. The Velcro patch and the Velcro straps are glued together. An aluminum foil reflective layer is provided on the inner periphery of the heat insulation cover. The interior of the aluminum foil reflective layer is filled with heat insulation cotton. The heat insulation cotton is made of high-density aerogel. The heat insulation cover is made of flame-retardant and high-temperature resistant fiberglass cloth.

[0011] As a preferred technical solution of this utility model, the control component includes a bracket bolted to one side of the connecting flange, a control box fixedly installed on the top of the bracket, a controller fixedly installed inside the control box, a display screen on the top of the control box, and a status indicator light on one side of the control box. The display screen, status indicator light, electromagnetic heating coil, and temperature sensor are all electrically connected to the controller.

[0012] As a preferred technical solution of this utility model, a plurality of heat dissipation holes are provided on one side of the control box, and a filter screen is fixedly installed on one side of the interior of the plurality of heat dissipation holes.

[0013] As a preferred technical solution of this utility model, an alarm is provided on one side of the control box, and a loudspeaker is integrated on the alarm. The alarm and the loudspeaker are electrically connected to the controller.

[0014] As a preferred technical solution of this utility model, a maintenance plate is bolted to one side of the control box, and a wireless communication device is installed inside the control box. The wireless communication device is electrically connected to the controller and is used to upload the equipment operation data to the factory management platform.

[0015] As a preferred technical solution of this utility model, a sealing gasket is provided on the mating surface of the connecting flange, and the sealing gasket is made of high-temperature resistant fluororubber.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. By setting up segmented heating components, the independent start / stop and power adjustment of the feeding section, melting section and discharging section of the barrel body are realized. Relying on the tight fit of the thermally conductive silicone pad to eliminate thermal resistance, and with the real-time monitoring of the temperature sensor, three-stage gradient precise temperature control is achieved, which can adapt to the different temperature requirements of the raw materials at different melting stages, improve energy efficiency, avoid energy waste caused by overall heating, and at the same time ensure uniform heating of the raw materials and improve the molding quality of injection molded products;

[0018] 2. By setting up composite heat insulation components, the heat loss of the segmented heating components is effectively blocked. To address the problem of heat radiation and conduction loss on the surface of the heating sleeve during segmented heating, a double-layer structure of aluminum foil reflective layer and high-density aerogel insulation cotton is used to lock in the temperature. Combined with the outer layer of fiberglass cloth protection and the Velcro quick-release design, the independence of segmented temperature control is ensured, and the overall energy efficiency of the equipment is improved. Attached Figure Description

[0019] Figure 1 A schematic diagram of the heating and heat insulation energy-saving structure of the injection molding machine barrel provided by this utility model;

[0020] Figure 2A schematic diagram of the composite heat insulation component of the heating and heat insulation energy-saving structure of the injection molding machine barrel provided by this utility model;

[0021] Figure 3 Right view of the heating and heat insulation energy-saving structure of the injection molding machine barrel provided by this utility model;

[0022] Figure 4 The present invention provides a heating and heat insulation energy-saving structure for injection molding machine barrels. Figure 3 A schematic diagram of the three-dimensional cross-sectional structure at point AA;

[0023] Figure 5 The present invention provides a heating and heat insulation energy-saving structure for injection molding machine barrels. Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 A schematic diagram of the heating and heat insulation energy-saving alarm structure for the injection molding machine barrel provided by this utility model;

[0025] Figure 7 A schematic diagram of the heating and heat insulation energy-saving structure control component for the injection molding machine barrel provided by this utility model;

[0026] Figure 8 This is a right-side cross-sectional three-dimensional structural schematic diagram of the heating and heat insulation energy-saving structure control box for the injection molding machine barrel provided by this utility model.

[0027] The diagram shows: 1. Barrel body; 2. Segmented heating assembly; 3. Composite heat insulation assembly; 4. Control assembly; 201. Heating sleeve; 202. Electromagnetic heating coil; 203. Thermally conductive silicone pad; 204. Temperature sensing cavity; 205. Temperature sensor; 206. Connecting flange; 301. Heat insulation cover; 302. Velcro strap; 303. Velcro patch; 304. Aluminum foil reflective layer; 305. Heat insulation cotton; 401. Bracket; 402. Control box; 403. Controller; 404. Display screen; 405. Status indicator light; 5. Heat dissipation hole; 6. Filter screen; 7. Alarm; 8. Loudspeaker; 9. Inspection plate; 10. Wireless communication equipment; 11. Sealing gasket. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0029] Example: Figures 1-8As shown, this embodiment proposes a heating and heat insulation energy-saving structure for an injection molding machine barrel, including a barrel body 1, a segmented heating component 2 for achieving precise segmented temperature control of the barrel body 1 on its periphery, a composite heat insulation component 3 for blocking heat loss and reducing energy consumption on its periphery, and a control component 4 for regulating the operating status of the equipment on the segmented heating component 2.

[0030] like Figure 5 As shown, the segmented heating assembly 2 includes three heating sleeves 201 arranged axially around the periphery of the barrel body 1. Electromagnetic heating coils 202 are embedded in the inner walls of the three heating sleeves 201. Thermally conductive silicone pads 203 are fixedly installed on the inner periphery of each heating sleeve 201, and the thermally conductive silicone pads 203 are in close contact with the outer wall of the barrel body 1. A temperature sensing cavity 204 is formed inside each heating sleeve 201, and a temperature sensor 205 (PT100 type) is fixedly installed inside the temperature sensing cavity 204. Connecting flanges 206 are fixedly installed at both ends of each heating sleeve 201, and the connecting flanges 206 are bolted to the connecting flanges 206 of adjacent heating sleeves 201. The three heating sleeves 201 correspond to the feeding section, melting section, and discharging section of the barrel body 1, respectively, and can be independently started / stopped and have their power adjusted. In use, the three heating sleeves 201 are arranged axially around the feeding section, melting section, and discharging section, respectively. The heating sleeves 201 are bolted together with the connecting flanges 206 at both ends to form a stable segmented heating structure. The electromagnetic heating coils 202 embedded in the inner wall of each heating sleeve 201 are independently energized. After energization, an alternating magnetic field is generated, which causes eddy currents to be generated in the corresponding section of the material cylinder body 1 and heats up rapidly. The thermally conductive silicone pads 203 on the inner periphery of the heating sleeve 201 are in close contact with the outer wall of the material cylinder body 1, effectively eliminating the gap between the parts and reducing the thermal resistance. This ensures that the heat is transferred to the inside of the material cylinder body 1 quickly and evenly, ensuring that the raw material is heated evenly. At the same time, the temperature sensor 205 in the temperature sensing cavity 204 collects the temperature data of the corresponding section in real time. Based on the difference between the collected real-time temperature and the preset target temperature, the start-stop status and power output of each heating sleeve 201 are precisely adjusted to achieve three independent gradient precise temperature control. This perfectly adapts to the different temperature requirements of the raw material at different stages in the material cylinder body 1, improving heating efficiency and temperature control accuracy.

[0031] like Figure 2 and Figure 5As shown, the composite heat insulation component 3 includes a heat insulation cover 301 wrapped around the outer periphery of the heating sleeve 201. Two Velcro straps 302 are fixedly installed on the surface of the heat insulation cover 301. A Velcro patch 303 is fixedly installed on the side of the heat insulation cover 301 away from the Velcro straps 302. The Velcro patch 303 and the Velcro straps 302 are glued together. An aluminum foil reflective layer 304 is provided on the inner periphery of the heat insulation cover 301. The interior of the aluminum foil reflective layer 304 is filled with heat insulation cotton 305. The heat insulation cotton 305 is made of high-density aerogel. The heat insulation cover 301 is made of flame-retardant and high-temperature resistant fiberglass cloth. In use, the heat insulation cover 301 is wrapped around the heating sleeve 201. On the outer perimeter, the heat insulation cover 301 and the outer wall of the heating sleeve 201 are tightly fitted together by the mutual adhesion of the Velcro straps 302 and Velcro patches 303, preventing loosening and gaps. The outer layer of the heat insulation cover 301, made of flame-retardant and high-temperature resistant fiberglass cloth, provides basic protection and heat insulation. The inner aluminum foil reflective layer 304 can efficiently reflect the heat radiated outward from the heating sleeve 201, reducing heat radiation loss. The high-density aerogel insulation cotton 305 filled inside the aluminum foil reflective layer 304 further blocks the heat conduction path due to its low thermal conductivity. The three work together to form a composite heat insulation barrier, maximizing the reduction of heat loss from the heating sleeve 201 and improving energy-saving effect.

[0032] like Figure 7 As shown, the control assembly 4 includes a bracket 401 bolted to one side of the connecting flange 206. A control box 402 is fixedly mounted on the top of the bracket 401. A controller 403 is fixedly mounted inside the control box 402. The controller 403 is a Siemens S7-200 SMART SR40. The PLC control box 402 has a display screen 404 on its top and a status indicator light 405 on one side. The display screen 404, status indicator light 405, electromagnetic heating coil 202, and temperature sensor 205 are all electrically connected to the controller 403. In use, the bracket 401 bolted to one side of the connecting flange 206 provides stable support for the control box 402. The controller 403, which is fixedly installed inside the control box 402 on the top of the bracket 401, serves as the core control unit and receives real-time temperature data transmitted by the temperature sensor 205. The display screen 404 on the top of the control box 402 allows operators to set target temperatures for each segment and view equipment operating parameters. The status indicator light 405 uses different colors (red, green, and yellow) to indicate equipment fault, running, and standby status. The controller 403 is electrically connected to the electromagnetic heating coil 202 and the temperature sensor 205. Based on preset parameters and feedback signals from the temperature sensor 205, it precisely controls the working state of the electromagnetic heating coil 202 to achieve coordinated operation of all components.

[0033] like Figure 8As shown, a number of heat dissipation holes 5 are provided on one side of the control box 402. A filter screen 6 is fixedly installed inside one side of each of the heat dissipation holes 5. During operation, the internal components of the control box 402 will generate heat. The heat dissipation holes 5 on one side of the control box 402 form an air circulation channel, which dissipates the internal heat through auxiliary airflow, preventing the components from being affected by high temperature and thus affecting the operational stability. The filter screen 6 fixedly installed inside one side of the heat dissipation holes 5 can effectively block external dust and impurities from entering the control box 402, preventing dust from adhering to the surface of electrical components and causing problems such as short circuits and poor heat dissipation. While ensuring the heat dissipation effect, it also provides dust protection for the internal components of the control box 402 and extends the service life of the equipment.

[0034] like Figure 6 As shown, an alarm 7 is installed on one side of the control box 402. The alarm 7 integrates a loudspeaker 8. The alarm 7 and the loudspeaker 8 are electrically connected to the controller 403. In use, the alarm 7 and the loudspeaker 8 receive signal commands from the controller 403 through electrical connection. When the temperature sensor 205 detects that the temperature of a certain section of the barrel body 1 exceeds the preset range, or when the controller 403 detects a circuit fault or abnormality of the segmented heating component 2, the controller 403 will simultaneously send trigger signals to the alarm 7 and the loudspeaker 8. The alarm 7 will immediately issue an audible and visual warning to remind the on-site operators to pay attention to the equipment status. The loudspeaker 8 will simultaneously play the corresponding voice prompts, clearly indicating the type of abnormality (such as "melting section temperature too high" or "electromagnetic heating coil 202 malfunction"), to help the operators quickly locate the problem and take corrective measures.

[0035] like Figure 7 As shown, a maintenance plate 9 is bolted to one side of the control box 402. A wireless communication device 10 is installed inside the control box 402. The wireless communication device 10 is electrically connected to the controller 403 and is used to upload equipment operation data to the factory management platform. During use, the wireless communication device 10 interacts with the controller 403 via electrical connection, collecting real-time operating data such as the temperature of each section of the barrel body 1 and equipment fault codes transmitted by the controller 403, and uploading it to the factory management platform. This facilitates remote monitoring of the equipment status by management personnel. The maintenance plate 9 bolted to one side of the control box 402 can be easily removed. When internal components of the control box 402 experience signal abnormalities or data transmission failures, operators can remove the maintenance plate 9 to inspect, debug, or replace the internal components of the control box 402, ensuring the stability and continuity of equipment operation.

[0036] like Figure 5As shown, a sealing gasket 11 is provided on the mating surface of the connecting flange 206. The sealing gasket 11 is made of high-temperature resistant fluororubber. During use, when the connecting flange 206 is bolted and fixed to the connecting flange 206 of the adjacent heating sleeve 201, the sealing gasket 11 (made of high-temperature resistant fluororubber) between the mating surfaces will undergo slight deformation under the bolt tightening pressure, which can tightly fill the tiny gaps between the mating surfaces of the connecting flange 206. This sealing gasket 11 can not only block heat from being lost from the joint of the connecting flange 206 through heat convection, but also prevent external dust and moisture from entering the interior of the heating sleeve 201, ensuring a long-term sealing and protection effect.

[0037] Working Principle: This utility model provides a heating and heat insulation energy-saving structure for injection molding machine barrels. The specific usage steps are as follows: Three heating sleeves 201 are sequentially positioned along the axial direction of the barrel body 1, corresponding to the feeding section, melting section, and discharge section. They are bolted and fixed to adjacent heating sleeves 201 via connecting flanges 206 at both ends, forming a stable segmented heating structure. Electromagnetic heating coils 202 embedded in the inner wall of each heating sleeve 201 are independently energized. After energization, an alternating magnetic field is generated, causing eddy currents to form in the corresponding section of the barrel body 1 and rapidly heating it. The thermally conductive silicone pads 203 on the inner periphery of the heating sleeves 201... The outer wall of the barrel body 1 is tightly pressed against the material, effectively eliminating gaps and reducing thermal resistance. This ensures that heat is quickly and evenly transferred to the interior of the barrel body 1, guaranteeing uniform heating of the raw material. Simultaneously, the temperature sensor 205 within the temperature sensing cavity 204 collects real-time temperature data for the corresponding section. Based on the difference between the collected real-time temperature and the preset target temperature, the start / stop status and power output of each heating sleeve 201 are precisely adjusted, achieving three independent gradient temperature control. This perfectly adapts to the differentiated temperature requirements of the raw material at different stages within the barrel body 1, improving heating efficiency and temperature control accuracy (e.g., ...). Figure 5 As shown), the heat insulation cover 301 is wrapped around the outer periphery of the heating sleeve 201. The Velcro straps 302 and Velcro patches 303 are used to secure the heat insulation cover 301 to the outer wall of the heating sleeve 201, preventing loosening and gaps. The outer layer of the heat insulation cover 301, made of flame-retardant and high-temperature resistant fiberglass cloth, provides basic protection and insulation. The inner aluminum foil reflective layer 304 efficiently reflects the heat radiated outward from the heating sleeve 201, reducing heat loss. The high-density aerogel insulation cotton 305 filled inside the aluminum foil reflective layer 304, with its low thermal conductivity, further blocks the heat conduction path. These three elements work together to form a composite heat insulation barrier, maximizing the reduction of heat loss from the heating sleeve 201 and improving energy efficiency (e.g., ...). Figure 2 and Figure 5 (As shown).

[0038] All technical features in this embodiment can be freely combined according to actual needs.

[0039] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A heating and heat insulation energy-saving structure for an injection molding machine barrel, comprising a barrel body (1), characterized in that, The barrel body (1) is provided with a segmented heating component (2) for achieving precise temperature control of the barrel body (1) in segments. The segmented heating component (2) is provided with a composite heat insulation component (3) for blocking heat loss and reducing energy consumption. The segmented heating component (2) is provided with a control component (4) for regulating the operating status of the equipment. The segmented heating assembly (2) includes three heating sleeves (201) arranged axially around the circumference of the barrel body (1). Electromagnetic heating coils (202) are embedded in the inner walls of the three heating sleeves (201). Thermally conductive silicone pads (203) are fixedly installed on the inner circumference of the heating sleeves (201). The thermally conductive silicone pads (203) are in close contact with the outer wall of the barrel body (1). A temperature sensing cavity (204) is opened inside the heating sleeves (201). A temperature sensor (205) is fixedly installed inside the temperature sensing cavity (204). Connecting flanges (206) are fixedly installed at both ends of the heating sleeves (201). The connecting flanges (206) are bolted to the connecting flanges (206) of the adjacent heating sleeves (201). The three heating sleeves (201) correspond to the feeding section, melting section and discharge section of the barrel body (1) respectively, and can be started and stopped and the power can be adjusted independently.

2. The heating and heat insulation energy-saving structure for an injection molding machine barrel according to claim 1, characterized in that, The composite heat insulation component (3) includes a heat insulation cover (301) wrapped around the outer periphery of the heating sleeve (201). Two Velcro straps (302) are fixedly installed on the surface of the heat insulation cover (301). A Velcro patch (303) is fixedly installed on the side of the heat insulation cover (301) away from the Velcro straps (302). The Velcro patch (303) and the Velcro straps (302) are glued together. An aluminum foil reflective layer (304) is provided on the inner periphery of the heat insulation cover (301). The interior of the aluminum foil reflective layer (304) is filled with heat insulation cotton (305). The heat insulation cotton (305) is made of high-density aerogel. The heat insulation cover (301) is made of flame-retardant and high-temperature resistant fiberglass cloth.

3. The heating and heat insulation energy-saving structure for an injection molding machine barrel according to claim 1, characterized in that, The control component (4) includes a bracket (401) bolted to one side of a connecting flange (206). A control box (402) is fixedly installed on the top of the bracket (401). A controller (403) is fixedly installed inside the control box (402). A display screen (404) is provided on the top of the control box (402). A status indicator light (405) is provided on one side of the control box (402). The display screen (404), status indicator light (405), electromagnetic heating coil (202), and temperature sensor (205) are all electrically connected to the controller (403).

4. The heating and heat insulation energy-saving structure for an injection molding machine barrel according to claim 3, characterized in that, The control box (402) has several heat dissipation holes (5) on one side, and a filter screen (6) is fixedly installed on one side of the inside of the several heat dissipation holes (5).

5. The heating and heat insulation energy-saving structure for an injection molding machine barrel according to claim 3, characterized in that, An alarm (7) is provided on one side of the control box (402), and a loudspeaker (8) is integrated on the alarm (7). The alarm (7) and the loudspeaker (8) are electrically connected to the controller (403).

6. The heating and heat insulation energy-saving structure for an injection molding machine barrel according to claim 3, characterized in that, A maintenance plate (9) is bolted to one side of the control box (402). A wireless communication device (10) is installed inside the control box (402). The wireless communication device (10) is electrically connected to the controller (403) and is used to upload the equipment operation data to the factory management platform.

7. The heating and heat insulation energy-saving structure for an injection molding machine barrel according to claim 1, characterized in that, The mating surface of the connecting flange (206) is provided with a sealing gasket (11), and the sealing gasket (11) is made of high temperature resistant fluororubber.

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