Heating device for injection molding machine

Abstract

The utility model relates to a heating device for an injection molding machine, which belongs to the technical field of injection molding machine accessories and comprises an injection molding cylinder, a plurality of heaters are sleeved on the surface of the injection molding cylinder, a communicating pipe is fixedly mounted between the two heaters, and a feed hopper is fixedly mounted at the top of the injection molding cylinder. And a heating sleeve is fixedly installed on the surface of the feeding hopper, a heating inlet pipe is fixedly installed between the heater close to the feeding hopper and the heating sleeve, and each heater comprises a heating shell arranged on the surface of the injection molding barrel in a sleeving mode. According to the heating device for the injection molding machine, partition plates are arranged in the heaters, heating cavities are formed outside the partition plates, the multiple heaters communicate the heating cavities through communicating pipes, cooling water is introduced into the heating cavities, a heating sleeve is arranged on the surface of a feeding hopper, and the heated cooling water is introduced into the heating sleeve; materials in the feeding hopper are preheated, and the heating and melting efficiency of the materials in the injection molding barrel is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of injection molding machine parts, specifically a heating device for injection molding machines. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment that uses plastic molds to form various shapes of plastic products from thermoplastic or thermosetting plastics. The working principle of an injection molding machine is similar to that of a syringe; using the thrust of a screw or plunger, molten plastic is injected into a closed mold cavity, where it solidifies and sets to obtain the finished product. Injection molding is a cyclical process. Each cycle mainly includes metered feeding, melting and plasticizing, pressure injection, mold filling and cooling, mold opening and part removal, and then closing the mold again for the next cycle.

[0003] A heating device is required during the operation of an injection molding machine. Utility model patent CN213353418U discloses a heating device for injection molding, comprising an injection cylinder and a nano-far-infrared heating layer surrounding the injection cylinder. Two movable arc plates are symmetrically arranged outside the nano-far-infrared heating layer. A reflective layer is fixedly connected to the inner end face of the two movable arc plates. The two movable arc plates are two symmetrical arc structures on concentric circles of the same radius. The two movable arc plates are hollow structures. A heat insulation layer is fitted over the two movable arc plates, and a heat preservation layer is fitted over the heat insulation layer. A circuit layer is located between the two movable arc plates and the heat insulation layer. This utility model, through the arrangement of the insulating heat insulation layer, reflective layer, heat insulation layer, and heat preservation layer, ensures that the heat of the heating device is blocked by four layers of components, greatly reducing the heat loss of the heating device.

[0004] However, the heating device used in this injection molding machine is located on the surface of the injection barrel. The heating element in it heats the inner side of the injection barrel, while the heat on the outer side is lost to the outside, resulting in a large amount of heat loss. Therefore, a heating device for injection molding machines is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a heating device for injection molding machines, which has the advantages of fully utilizing the heat of the heating device. It solves the problem that common injection molding machine heating devices are set on the surface of the injection barrel, where the heating element heats the inner side of the injection barrel, while the heat on the outer side is lost to the outside, resulting in significant heat loss.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A heating device for an injection molding machine includes an injection cylinder, a plurality of heaters are sleeved on the surface of the injection cylinder, a connecting pipe is fixedly installed between two of the heaters, a feed hopper is fixedly installed on the top of the injection cylinder, a heating sleeve is fixedly installed on the surface of the feed hopper, and a heating inlet pipe is fixedly installed between one of the heaters near the feed hopper and the heating sleeve.

[0008] The heater includes a heating shell sleeved on the surface of the injection molding cylinder. A partition plate is fixedly installed on the inner side wall of the heating shell. A heating wire is fixedly installed between the inner side of the partition plate and the inner wall of the heating shell. Two external water pipes are fixedly installed on the surface of the heating shell.

[0009] Furthermore, a heating outlet pipe is fixedly installed on one side of the heating jacket, and a heating ring pipe is fixedly installed inside the heating jacket.

[0010] Furthermore, the input end of the heating ring tube is connected to the heating inlet tube, and the output end of the heating ring tube is connected to the heating outlet tube.

[0011] Furthermore, the injection molding cylinder is fixedly installed on the top of the mounting base, and a circulating water tank is fixedly installed on the top of the mounting base.

[0012] Furthermore, the output end of the heating outlet pipe is fixedly connected to the top of the circulating water tank, and a circulating pump is fixedly installed on the top of the mounting base.

[0013] Furthermore, an output pipe is fixedly installed at the output end of the circulating pump, and one end of the output pipe is connected to an external water pipe at the top of the heater, which is away from the heating jacket.

[0014] Furthermore, an input pipe is fixedly installed on one side of the circulating water tank, and one end of the input pipe is connected to the input end of the circulating pump.

[0015] Compared with the prior art, this utility model provides a heating device for injection molding machines, which has the following beneficial effects:

[0016] The heating device used in this injection molding machine has a partition plate inside the heater, and the outside of the partition plate is a heating cavity. Multiple heaters are connected to the heating cavity through a connecting pipe. Cooling water is introduced into the heating cavity. A heating jacket is set on the surface of the feed hopper, and heated cooling water is introduced into the heating jacket to preheat the material in the feed hopper. This increases the efficiency of heating and melting of the material in the injection barrel. This solves the problem of common injection molding machine heating devices, which are set on the surface of the injection barrel, and the heating element inside heats the inner side of the injection barrel, while the heat on the outer side is lost to the outside, resulting in a large amount of heat loss. Attached Figure Description

[0017] Figure 1This is a front view of the structure of this utility model;

[0018] Figure 2 This is a front sectional view of the feed hopper of this utility model;

[0019] Figure 3 This is a side sectional view of the heater of this utility model;

[0020] Figure 4 This is a three-dimensional cross-sectional view of the heater of this utility model.

[0021] In the diagram: 1. Injection cylinder; 2. Heater; 21. Heating shell; 22. Divider plate; 23. Heating wire; 24. External water pipe; 3. Connecting pipe; 4. Feed hopper; 5. Heating jacket; 51. Heating ring pipe; 6. Heating inlet pipe; 7. Heating outlet pipe; 8. Mounting base; 9. Circulating water tank; 10. Circulating pump; 11. Output pipe; 12. Input pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1 to 4 A heating device for an injection molding machine in this embodiment includes an injection cylinder 1, a plurality of heaters 2 are sleeved on the surface of the injection cylinder 1, a connecting pipe 3 is fixedly installed between two heaters 2, a feed hopper 4 is fixedly installed on the top of the injection cylinder 1, a heating sleeve 5 is fixedly installed on the surface of the feed hopper 4, and a heating inlet pipe 6 is fixedly installed between a heater 2 near the feed hopper 4 and the heating sleeve 5.

[0024] The heater 2 includes a heating shell 21 fitted onto the surface of the injection molding cylinder 1. A partition plate 22 is fixedly installed on the inner wall of the heating shell 21. A heating wire 23 is fixedly installed between the inner side of the partition plate 22 and the inner wall of the heating shell 21. Two external water pipes 24 are fixedly installed on the surface of the heating shell 21. A connecting pipe 3 connects the external cavity of the partition plate 22 inside the heating shell 21. Circulating water is introduced into the external cavity. The circulating water absorbs the heat emitted by the heating wire 23 and is input into the heating jacket 5 through the heating inlet pipe 6 to heat the material in the feed hopper 4.

[0025] Specifically, the circulating water absorbs the heat emitted by the heating wire 23 and is input into the heating jacket 5 through the heating inlet pipe 6 to heat the material in the feed hopper 4, thereby increasing the initial temperature of the material and reducing the heat required to heat the material in the injection molding cylinder 1.

[0026] Please see Figure 2 In this embodiment, a heating outlet pipe 7 is fixedly installed on one side of the heating sleeve 5, and a heating ring pipe 51 is fixedly installed inside the heating sleeve 5.

[0027] The input end of the heating ring tube 51 is connected to the heating inlet tube 6, and the output end of the heating ring tube 51 is connected to the heating outlet tube 7.

[0028] Please see Figure 1 In this embodiment, the injection molding cylinder 1 is fixedly installed on the top of the mounting base 8, and the top of the mounting base 8 is fixedly installed with a circulating water tank 9.

[0029] The output end of the heating outlet pipe 7 is fixedly connected to the top of the circulating water tank 9, and the top of the mounting base 8 is fixedly mounted with a circulating pump 10.

[0030] Secondly, an output pipe 11 is fixedly installed at the output end of the circulating pump 10, and one end of the output pipe 11 is connected to an external water pipe 24 at the top of the heater 2, which is far away from the heating jacket 5.

[0031] Finally, an inlet pipe 12 is fixedly installed on one side of the circulating water tank 9, and one end of the inlet pipe 12 is connected to the inlet of the circulating pump 10.

[0032] Specifically, the circulating pump 10 starts, inputting the circulating water in the circulating water tank 9 into the heater 2, which is far away from the heating jacket 5. The circulating water flows into the heating ring pipe 51 through the heating inlet pipe 6, and finally flows back to the circulating water tank 9 through the heating outlet pipe 7.

[0033] The working principle of the above embodiment is as follows: the circulation pump 10 is started, so that the circulating water in the circulating water tank 9 circulates in the heater 2 and the heating ring pipe 51, absorbing the heat emitted by the heating wire 23 and heating the material in the feed hopper 4.

[0034] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.

[0035] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heating device for an injection molding machine, comprising an injection cylinder (1), characterized in that: The surface of the injection molding cylinder (1) is fitted with a plurality of heaters (2), and a connecting pipe (3) is fixedly installed between two heaters (2). A feed hopper (4) is fixedly installed on the top of the injection molding cylinder (1), and a heating sleeve (5) is fixedly installed on the surface of the feed hopper (4). A heating inlet pipe (6) is fixedly installed between one of the heaters (2) near the feed hopper (4) and the heating sleeve (5). The heater (2) includes a heating shell (21) sleeved on the surface of the injection molding cylinder (1). A partition plate (22) is fixedly installed on the inner side wall of the heating shell (21). A heating wire (23) is fixedly installed between the inner side of the partition plate (22) and the inner wall of the heating shell (21). Two external water pipes (24) are fixedly installed on the surface of the heating shell (21).

2. The heating device for an injection molding machine according to claim 1, characterized in that: A heating outlet pipe (7) is fixedly installed on one side of the heating sleeve (5), and a heating ring pipe (51) is fixedly installed inside the heating sleeve (5).

3. The heating device for an injection molding machine according to claim 2, characterized in that: The input end of the heating ring tube (51) is connected to the heating inlet tube (6), and the output end of the heating ring tube (51) is connected to the heating outlet tube (7).

4. A heating device for an injection molding machine according to claim 3, characterized in that: The injection molding cylinder (1) is fixedly installed on the top of the mounting base (8), and a circulating water tank (9) is fixedly installed on the top of the mounting base (8).

5. A heating device for an injection molding machine according to claim 4, characterized in that: The output end of the heating outlet pipe (7) is fixedly connected to the top of the circulating water tank (9), and the top of the mounting base (8) is fixedly installed with a circulating pump (10).

6. A heating device for an injection molding machine according to claim 5, characterized in that: The output end of the circulating pump (10) is fixedly equipped with an output pipe (11), and one end of the output pipe (11) is connected to an external water pipe (24) at the top of the heater (2) away from the heating jacket (5).

7. A heating device for an injection molding machine according to claim 6, characterized in that: An input pipe (12) is fixedly installed on one side of the circulating water tank (9), and one end of the input pipe (12) is connected to the input end of the circulating pump (10).

Images