Heating device of injection molding machine

Abstract

The utility model relates to the field of injection molding machines, and discloses a heating device of an injection molding machine, which comprises an operation table, supports are fixed at two ends of the top of the operation table, a shell is fixed at the tops of the two supports, and a charging barrel penetrates through the side wall of the shell. The charging barrel is heated through the multiple heating rings, the multiple heating rings are covered with the shell, heat loss is avoided, meanwhile, the interior of the shell is blown through the air supply mechanism, air becomes hot air after making contact with the multiple heating rings, the hot air enters the connecting base through the multiple branch pipes, and the hot air enters the connecting base through the multiple branch pipes. The raw materials are uniformly heated and the quality of formed products is improved by performing crushing treatment on the materials with different sizes through a crushing mechanism, so that the situation that the speed is low due to the fact that the materials enter a charging barrel to be melted due to the fact that the size difference of the material particles is large is avoided; and the working efficiency is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a heating device for an injection molding machine. Background Art

[0002] An injection molding machine is a mechanical device used for plastic molding and is widely used in the production of plastic products. It melts plastic particles by heating them, then injects them into a mold and cools them to form various plastic parts. Injection molding is one of the most commonly used manufacturing processes in the modern plastic processing industry. Its core is to heat the plastic raw materials to a molten state and inject them into the mold at high pressure to cool and form them. In this process, the performance of the heating device directly affects key indicators such as the production efficiency, product quality and energy consumption of the injection molding machine.

[0003] Traditional injection molding machine heating devices usually use heating tubes for heating. The heating tubes are installed on the outer wall of the barrel to conduct heat to the side wall of the barrel. The conducted heat heats the material to prevent the material from solidifying. Part of the heat is absorbed by the barrel wall for conduction, and the other part of the heat will be dissipated into the external space and lost. Moreover, the material close to the inner wall of the barrel absorbs more heat and melts faster, but the material far from the side wall of the barrel absorbs less heat and melts slowly. This heating method can easily lead to uneven temperature distribution of the raw materials, thereby affecting the quality of the molded products. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a heating device for an injection molding machine.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A heating device for an injection molding machine comprises an operating table, brackets are fixed at both ends of the top of the operating table, the same shell is fixed on the top of the two brackets, a barrel is provided through the side wall of the shell, a feed hopper is fixed to the side wall of one end of the shell, and the feed hopper and the barrel are connected, a crushing mechanism for crushing is provided inside the feed hopper, a plurality of heating rings are equidistantly sleeved on the outer wall of the barrel, an injection rod is rotatably connected to the inner side wall of one end of the barrel, the injection rod is a cavity structure, and one end of the injection rod passes through the outer wall of one end of the barrel, a plurality of circular holes are equidistantly linearly provided on the side wall of the injection rod, a rotating mechanism for rotating the injection rod is provided on the top of the operating table, one end of the injection rod is rotatably connected to a connecting seat, the connecting seat is a cavity structure, and the connecting seat is connected to the injection molding rod, a plurality of branch pipes are fixed on the side wall of the connecting seat at equal distances, and the plurality of branch pipes are connected to the shell The injection molding rod is connected, and a screw head is fixed to the other end of the injection molding rod. The top of the operating table is provided with an air supply mechanism for supplying air to the inside of the shell, and the side wall of the injection molding rod is provided with a stirring mechanism for stirring. During use, the barrel is heated by multiple heating rings, and the multiple heating rings are covered with the shell to avoid heat loss. At the same time, the inside of the shell is blown by the air supply mechanism, and the air is converted into hot air after contact with the multiple heating rings. The hot air enters the connecting seat through multiple branch pipes and enters the inside of the injection molding rod, and is sprayed to the inside of the raw material part through multiple circular holes, and the raw material is heated twice, so that the raw material is heated evenly and the quality of the molded product is improved. The materials of different sizes are crushed by the crushing mechanism to avoid large differences in the size of the material particles, which causes the material to enter the barrel for melting, resulting in a low speed and reduced work efficiency.

[0007] As a further solution of the present invention, the crushing mechanism includes two rotating shafts, both of which are rotatably connected to the inner wall of the feed hopper, and the two rotating shafts are in a parallel state. The side walls of the two rotating shafts are sleeved with crushing rollers, and one end of the two rotating shafts is sleeved with gears, and the two gears are meshed. A second motor is fixed to the outer wall of the feed hopper, and the output shaft of the second motor is fixed to one of the rotating shafts. The second motor is driven to drive one of the rotating shafts to rotate, and the two gears cooperate to drive the other rotating shaft to rotate, thereby driving the two crushing rollers to rotate in a counter-rotating manner, which can crush the material, avoid large differences in material particle size, affect the later melting speed, and improve work efficiency.

[0008] As a further solution of the present utility model, the rotating mechanism includes a first motor, which is fixed to one end of the top of the operating table, the output shaft of the first motor is sleeved with a first synchronous wheel, one end of the injection rod is sleeved with a second synchronous wheel, and the top of the operating table is rotatably connected with a synchronous belt, one end of the synchronous belt is sleeved on the side wall of the first synchronous wheel, and the other end of the synchronous belt is sleeved on the side wall of the second synchronous wheel. The first motor is driven to drive the first synchronous wheel to rotate, and the synchronous belt and the second synchronous wheel are cooperated to drive the injection rod and the screw head to rotate simultaneously, and the melted material is transported to the mold for injection molding.

[0009] As a further solution of the present invention, the air supply mechanism includes a fan, which is fixed to one side of the top of the operating table. A connecting pipe is fixed to the output end of the fan, and one end of the connecting pipe is connected to the outer shell. When the injection molding rod rotates, it drives multiple stirring rods to rotate, stirring the molten material so that the material is heated evenly.

[0010] As a further solution of the present invention, the stirring mechanism includes a plurality of stirring rods, which are spirally fixed on the outer wall of the injection molding rod at equal distances. The driving fan cooperates with the connecting pipe to suck external air into the interior of the outer shell, and contacts the surface of the plurality of heating rings, so that the air temperature rises. At this time, the hot air enters the connecting seat through the plurality of branch pipes, and enters the interior of the injection molding rod through the connecting seat. The hot air entering the interior of the injection molding rod is sprayed into the interior of the molten material through the plurality of circular holes, and the melted material is subjected to secondary heating treatment, which avoids heat loss while making the material heated more evenly, thereby improving the quality of the molded product.

[0011] As a further solution of the present invention, the inner wall of the shell is provided with a heat insulation layer, which prevents the external heat of the multiple heating rings from being transmitted into the external environment through the shell, thereby avoiding heat loss.

[0012] The beneficial effects of the utility model are:

[0013] 1. During the use of this device, the raw materials are injected into the barrel through the feed hopper, and the barrel is heated by multiple heating rings, and then the raw materials are melted. During the melting process, the multiple heating rings are covered by the outer shell to avoid heat loss. At the same time, the inside of the outer shell is blown by the air supply mechanism. After the air contacts the multiple heating rings, it becomes hot air. The hot air enters the connecting seat through multiple branch pipes and enters the inside of the injection molding rod. It is sprayed to the inside of the raw material part through multiple circular holes to heat the raw materials for the second time. During the heating process, the injection molding rod is driven to rotate by the rotating mechanism, and the raw materials are stirred in conjunction with the stirring mechanism, so that the raw materials are heated evenly and the quality of the molded products is improved.

[0014] 2. During injection molding, when the material is added to the barrel, the crushing mechanism crushes the materials of different sizes to avoid large differences in the size of the material particles, which causes the material to enter the barrel for melting, resulting in a lower speed and reduced work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a heating device for an injection molding machine proposed in the utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the housing and barrel of a heating device for an injection molding machine proposed in the present invention;

[0017] Figure 3 This is a schematic diagram of a barrel and heating ring of a heating device for an injection molding machine proposed in the utility model;

[0018] Figure 4 This is a schematic cross-sectional diagram of the housing and heat insulation layer of a heating device for an injection molding machine proposed in the present invention;

[0019] Figure 5 This is a schematic diagram of an injection rod, a circular hole and a stirring rod of a heating device of an injection molding machine proposed by the utility model;

[0020] Figure 6 This is a cross-sectional schematic diagram of a feed hopper and a crushing roller of a heating device for an injection molding machine proposed by the utility model.

[0021] In the figure: 1. Operating table; 2. Bracket; 3. Fan; 4. Connecting pipe; 5. Casing; 6. Barrel; 7. Feed hopper; 8. First motor; 9. Connecting seat; 10. Branch pipe; 11. Insulation layer; 12. Heating ring; 13. Injection rod; 14. Round hole; 15. Screw head; 16. First synchronous wheel; 17. Synchronous belt; 18. Second synchronous wheel; 19. Stirring rod; 20. Second motor; 21. Rotating shaft; 22. Crushing roller; 23. Gear. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Reference Figures 1-6, a heating device for an injection molding machine, comprising an operating table 1, with brackets 2 fixed at both ends of the top of the operating table 1, a same shell 5 fixed on the top of the two brackets 2, a barrel 6 is provided through the side wall of the shell 5, a feed hopper 7 is fixed to the side wall at one end of the shell 5, and the feed hopper 7 is connected to the barrel 6, a crushing mechanism for crushing is provided inside the feed hopper 7, a plurality of heating rings 12 are equidistantly sleeved on the outer wall of the barrel 6, an injection rod 13 is rotatably connected to the inner side wall of one end of the barrel 6, the injection rod 13 is a cavity structure, and one end of the injection rod 13 passes through the outer wall of one end of the barrel 6, a plurality of circular holes 14 are equidistantly linearly opened on the side wall of the injection rod 13, a rotating mechanism for rotating the injection rod 13 is provided on the top of the operating table 1, one end of the injection rod 13 is rotatably connected to a connecting seat 9, the connecting seat 9 is a cavity structure, and the connecting seat 9 is connected to the injection rod 13, a plurality of branch pipes 10 are fixed to the side wall of the connecting seat 9 at equal distances, and the plurality of branch pipes 10 are connected to the shell 5 The injection molding rod 13 is connected, and a screw head 15 is fixed to the other end of the injection molding rod 13. An air supply mechanism for supplying air to the inside of the shell 5 is provided on the top of the operating table 1, and a stirring mechanism for stirring is provided on the side wall of the injection molding rod 13. During use of the device, the barrel 6 is heated by multiple heating coils 12, and the multiple heating coils 12 are covered with the shell 5 to avoid heat loss. At the same time, the inside of the shell 5 is blown by the air supply mechanism, and the air becomes hot air after contact with the multiple heating coils 12. The hot air enters the connecting seat 9 through multiple branch pipes 10 and enters the inside of the injection molding rod 13, and is sprayed to the inside of the raw material part through multiple circular holes 14, and the raw material is heated again, so that the raw material is heated evenly, thereby improving the quality of the molded product. The materials of different sizes are crushed by the crushing mechanism to avoid large differences in the size of the material particles, which causes the material to enter the barrel 6 for melting, resulting in a low speed and reduced work efficiency.

[0024] Reference Figure 1 and Figure 6 In a preferred embodiment, the crushing mechanism includes two rotating shafts 21, which are rotatably connected to the inner wall of the feed hopper 7, and the two rotating shafts 21 are parallel. The side walls of the two rotating shafts 21 are sleeved with crushing rollers 22, and one end of the two rotating shafts 21 is sleeved with gears 23, and the two gears 23 are meshed. A second motor 20 is fixed to the outer wall of the feed hopper 7, and the output shaft of the second motor 20 is fixed to one of the rotating shafts 21. The second motor 20 drives one of the rotating shafts 21 to rotate, and cooperates with the two gears 23 to drive the other rotating shaft 21 to rotate, thereby driving the two crushing rollers 22 to rotate in a counter-rotating manner, which can crush the material, avoid large differences in material particle size, affect the later melting speed, and improve work efficiency.

[0025] Reference Figure 2 and Figure 5In a preferred embodiment, the rotating mechanism includes a first motor 8, which is fixed to one end of the top of the operating table 1. The output shaft of the first motor 8 is sleeved with a first synchronous wheel 16, and one end of the injection rod 13 is sleeved with a second synchronous wheel 18. The top of the operating table 1 is rotatably connected with a synchronous belt 17, one end of the synchronous belt 17 is sleeved on the side wall of the first synchronous wheel 16, and the other end of the synchronous belt 17 is sleeved on the side wall of the second synchronous wheel 18. The first motor 8 drives the first synchronous wheel 16 to rotate, and the synchronous belt 17 and the second synchronous wheel 18 drive the injection rod 13 and the screw head 15 to rotate simultaneously, and the melted material is transported to the mold for injection molding.

[0026] Reference Figure 1 In a preferred embodiment, the air supply mechanism includes a fan 3, which is fixed to one side of the top of the operating table 1. A connecting pipe 4 is fixed to the output end of the fan 3, and one end of the connecting pipe 4 is connected to the outer shell 5. When the injection rod 13 rotates, it drives multiple stirring rods 19 to rotate, stirring the molten material so that the material is heated evenly.

[0027] Reference Figure 4 and Figure 5 In a preferred embodiment, the stirring mechanism includes a plurality of stirring rods 19, which are spirally fixed on the outer wall of the injection rod 13 at equal distances. The driving fan 3 cooperates with the connecting pipe 4 to suck the external air into the interior of the shell 5, and contacts the surface of the plurality of heating rings 12, so that the air temperature rises. At this time, the hot air enters the connecting seat 9 through the plurality of branch pipes 10, and enters the interior of the injection rod 13 through the connecting seat 9. The hot air entering the interior of the injection rod 13 is sprayed into the interior of the molten material through the plurality of circular holes 14, and the molten material is subjected to secondary heating treatment, which avoids heat loss while making the material heated more evenly and improving the quality of the molded product.

[0028] Reference Figure 4 In a preferred embodiment, a heat insulating layer 11 is provided on the inner wall of the shell 5. The heat insulating layer 11 prevents the external heat of the plurality of heating coils 12 from being transferred into the external environment through the shell 5, thereby avoiding heat loss.

[0029] Working principle of this embodiment: When the device is in use, the material to be melted is pre-placed into the feed hopper 7. At this time, the power switch of the second motor 20 is turned on, and the second motor 20 is driven to drive one of the rotating shafts 21 to rotate, and the other rotating shaft 21 is driven to rotate in conjunction with the two gears 23, thereby driving the two crushing rollers 22 to rotate in a counter-rotating manner, which can crush the material and avoid a large difference in the size of the material particles, which affects the later melting speed and improves the working efficiency. The crushed material enters the barrel 6. At this time, the power switches of multiple heating rings 12 are turned on, and the surface of the barrel 6 is heated by the multiple heating rings 12 to melt the material. During the melting process, the power switch of the first motor 8 is turned on, and the first motor 8 is driven to drive the first synchronous wheel 16 to rotate, and the synchronous The belt 17 and the second synchronous wheel 18 drive the injection rod 13 and the screw head 15 to rotate simultaneously, and the melted material is transported to the mold for injection molding. While the injection rod 13 rotates, it drives multiple stirring rods 19 to rotate to stir the molten material. At the same time, the power switch of the fan 3 is connected, and the fan 3 is driven to cooperate with the connecting pipe 4 to suck external air into the shell 5, and contact the surface of multiple heating rings 12 to increase the air temperature. At this time, the hot air enters the connecting seat 9 through multiple branch pipes 10, and enters the injection rod 13 through the connecting seat 9. The hot air entering the injection rod 13 is sprayed into the molten material through multiple circular holes 14, and the melted material is subjected to secondary heating treatment. While avoiding heat loss, the material can be heated more evenly, thereby improving the quality of the molded product.

[0030] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A heating device for an injection molding machine, comprising an operating table (1), characterized in that: The operating table (1) is fixed with brackets (2) at both ends of the top, and the same shell (5) is fixed on the top of the two brackets (2). The side wall of the shell (5) is penetrated by a barrel (6). A feed hopper (7) is fixed to the side wall of one end of the shell (5), and the feed hopper (7) and the barrel (6) are connected. A crushing mechanism for crushing is provided inside the feed hopper (7). The outer wall of the barrel (6) is sleeved with multiple heating rings (12) at equal distances. The inner wall of one end of the barrel (6) is rotatably connected to an injection rod (13). The injection rod (13) is a cavity structure, and one end of the injection rod (13) penetrates the outer wall of one end of the barrel (6). The side of the injection rod (13) is connected to the outer wall of the barrel (6). A plurality of circular holes (14) are opened in a linear manner at equal distances on the wall. A rotating mechanism for rotating an injection molding rod (13) is provided on the top of the operating table (1). One end of the injection molding rod (13) is rotatably connected to a connecting seat (9). The connecting seat (9) is a cavity structure, and the connecting seat (9) and the injection molding rod (13) are connected. A plurality of branch pipes (10) are fixed on the side wall of the connecting seat (9) at equal distances, and the plurality of branch pipes (10) are all connected to the shell (5). A screw head (15) is fixed on the other end of the injection molding rod (13). An air supply mechanism for supplying air to the inside of the shell (5) is provided on the top of the operating table (1), and a stirring mechanism for stirring is provided on the side wall of the injection molding rod (13).

2. The heating device for an injection molding machine according to claim 1, characterized in that: The crushing mechanism comprises two rotating shafts (21), both rotating shafts (21) are rotatably connected to the inner side wall of the feed hopper (7), and the two rotating shafts (21) are in a parallel state. The side walls of the two rotating shafts (21) are sleeved with crushing rollers (22), one end of the two rotating shafts (21) is sleeved with a gear (23), and the two gears (23) are meshed. A second motor (20) is fixed to the outer side wall of the feed hopper (7), and the output shaft of the second motor (20) is fixed to one of the rotating shafts (21).

3. The heating device for an injection molding machine according to claim 1, characterized in that: The rotating mechanism comprises a first motor (8), the first motor (8) is fixed to one end of the top of the operating table (1), the output shaft of the first motor (8) is sleeved with a first synchronous wheel (16), one end of the injection rod (13) is sleeved with a second synchronous wheel (18), the top of the operating table (1) is rotatably connected with a synchronous belt (17), one end of the synchronous belt (17) is sleeved on the side wall of the first synchronous wheel (16), and the other end of the synchronous belt (17) is sleeved on the side wall of the second synchronous wheel (18).

4. The heating device for an injection molding machine according to claim 1, characterized in that: The air supply mechanism comprises a fan (3), the fan (3) being fixed to one side of the top of the operating table (1), a connecting pipe (4) being fixed to the output end of the fan (3), and one end of the connecting pipe (4) being connected to the housing (5).

5. The heating device for an injection molding machine according to claim 1, characterized in that: The stirring mechanism comprises a plurality of stirring rods (19), and the plurality of stirring rods (19) are fixed on the outer side wall of the injection rod (13) in a spiral manner at equal distances.

6. The heating device for an injection molding machine according to claim 1, characterized in that: The inner side wall of the outer shell (5) is provided with a heat insulation layer (11).

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