Injection molding cooling device

Abstract

The utility model relates to the technical field of plastic molding, in particular to an injection molding cooling device. According to the technical scheme, the cooler comprises a heat recycling mechanism which is installed outside a hopper and used for preheating plastic in the hopper through heat absorbed by cooling of the cooler, and the heat recycling mechanism comprises an outer sleeve arranged outside the hopper in a sleeving mode and a heat exchange coil pipe which is installed in the outer sleeve and attached to the barrel wall of the hopper; comprising a water guide pipe which is connected between the cooler and the heat recycling mechanism and plays a water guide role. Through the design that the heat recycling mechanism is additionally arranged outside the hopper, heat absorbed in the cooling process of the cooler can be utilized, and plastic to be subjected to injection molding in the hopper is preheated, so that the plastic can be molten more quickly in the subsequent heating process, the heating efficiency is improved, and the service life of the plastic is prolonged. And the energy utilization rate in the injection molding cooling process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic molding, in particular to an injection molding cooling device. Background Art

[0002] Plastic molding is the process of making various forms of plastic into products or blanks of the desired shape. There are many molding methods, such as injection molding. Injection molding is the molding process of using plastic molding molds to make plastics into various shapes. This process requires the plastic to be heated and melted first, then molded and cooled through the mold, so it needs to be matched with a cooling device to achieve it.

[0003] In the existing plastic injection molding, coolers, water chillers, etc. are used to transport coolant to the cooling pipe inside the molding mold, and the heat in the mold is taken away to cool the plastic part to form. After absorbing the heat, the coolant needs to exchange heat with equipment such as a cooling tower, and the cooling tower discharges the absorbed heat into the air through air cooling. In this process, the heat absorbed by the coolant is not well utilized, resulting in energy waste. To this end, the utility model proposes an injection molding cooling device that can effectively utilize the absorbed heat. Utility Model Content

[0004] The utility model aims to provide an injection molding cooling device in view of the problems existing in the background technology.

[0005] The technical solution of the utility model is as follows: an injection molding cooling device, including a cooler, including a heat recovery mechanism installed on the outside of a hopper for preheating plastic in the hopper by utilizing the heat absorbed by the cooler for cooling, the heat recovery mechanism including an outer sleeve mounted on the outside of the hopper and a heat exchange coil installed in the outer sleeve and attached to the wall of the hopper; including a water pipe connected between the cooler and the heat recovery mechanism for guiding water.

[0006] Optionally, the inner wall of the outer sleeve matches the outer wall of the hopper in size and shape.

[0007] Optionally, the heat exchange coil is spirally arranged between the outer wall of the hopper and the inner wall of the outer sleeve.

[0008] Optionally, the top end of the heat exchange coil is extended to the outside of the outer sleeve and is connected to a first pipe joint, and the first pipe joint is fixedly connected to the water pipe and communicated with the inside.

[0009] Optionally, the bottom end of the heat exchange coil is extended to the outside of the outer sleeve and is connected to a second pipe joint, and the second pipe joint is connected to the water inlet of the cooling tower through an external pipe.

[0010] Optionally, the inner wall at the top end of the outer sleeve is threadedly connected to the outer wall at the top end of the hopper.

[0011] Optionally, the bottom end of the hopper is detachably fixedly connected with a flange base, and the hopper is installed on the feed port of the injection molding machine through the flange base.

[0012] Optionally, the cooler includes a shell, a pipe box connected to two ends of the shell, and a heat dissipation pipe installed inside the shell.

[0013] Optionally, the shell is provided with a cold water inlet and a hot water outlet, the hot water outlet is fixedly connected to the end of the water pipe and is internally communicated, and the cold water inlet is connected to the water outlet of the cooling water tower through a pipeline.

[0014] Optionally, the two pipe boxes are respectively provided with a hot liquid inlet and a cold liquid outlet, the hot liquid inlet is connected to the water outlet end of the cooling water pipe of the injection molding machine through an external pipe, and the cold liquid outlet is connected to the water inlet end of the cooling water pipe of the injection molding machine through an external pipe.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] The present application adds a heat recovery mechanism to the outside of the hopper, so that the heat absorbed by the cooler during the cooling process can be utilized. The heat recovery mechanism is used to preheat the plastic to be used for injection molding in the hopper so that it can melt faster in the subsequent heating process, thereby improving the heating efficiency, that is, improving the energy utilization rate in the injection molding cooling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the injection molding cooling device;

[0018] Figure 2 for Figure 1 A top view of

[0019] Figure 3 for Figure 2 The schematic diagram of the plane of the intercooler cut along the AA line;

[0020] Figure 4 for Figure 2 Schematic diagram of the middle hopper and heat recovery mechanism cut along line BB.

[0021] Reference numerals: 1, cooler; 11, housing; 111, cold water inlet; 112, hot water outlet; 12, pipe box; 121, hot liquid inlet; 122, cold liquid outlet; 13, heat dissipation pipe;

[0022] 2. Hopper; 21. Flange base;

[0023] 3. Heat recovery mechanism; 31. Outer sleeve; 32. Heat exchange coil; 321. First pipe joint; 322. Second pipe joint;

[0024] 4. Water pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] like Figure 1-4As shown, an injection molding cooling device proposed by the utility model comprises a cooler 1, the cooler 1 comprises a shell 11, a pipe box 12 fixedly connected to both ends of the shell 11, and a heat dissipation pipe 13 fixedly installed inside the shell 11, and both ends of the heat dissipation pipe 13 are respectively connected to the inner walls of the two pipe boxes 12. The shell 11 is provided with a cold water inlet 111 and a hot water outlet 112, the hot water outlet 112 is fixedly connected to one end of the water pipe 4 and is internally connected, and the cold water inlet 111 is connected to the water outlet of the cooling water tower through a pipeline. The two pipe boxes 12 are respectively provided with a hot liquid inlet 121 and a cold liquid outlet 122, the hot liquid inlet 121 is connected to the water outlet end of the cooling water pipe of the injection molding machine through an external pipeline, and the cold liquid outlet 122 is connected to the water inlet end of the cooling water pipe of the injection molding machine through an external pipeline, and can be connected to a coolant storage device, a water pump and other structures, so that the coolant can flow between the cooling water pipe of the injection molding machine and the cooler 1. The above-mentioned water pipes and the following water pipes can realize the circulation and cutoff of water and provide water flow power by connecting common devices such as valves and water pumps. Since they are existing technologies, they will not be described in detail here.

[0029] In this embodiment, the injection molding cooling device also includes a heat recovery mechanism 3 installed outside the hopper 2 for preheating the plastic in the hopper 2 by using the heat absorbed by the cooler 1. The heat recovery mechanism 3 includes an outer sleeve 31 and a heat exchange coil 32. The inner wall size of the outer sleeve 31 is slightly larger than the outer wall size of the hopper 2, and the inner wall shape of the outer sleeve 31 is approximately the same as the outer wall shape of the hopper 2, so that the outer sleeve 31 can be located outside the hopper 2 in a manner close to covering, and the inner wall of the top of the outer sleeve 31 is provided with an internal thread, and the outer wall of the top of the hopper 2 is provided with an external thread matching the internal thread, and the outer sleeve 31 can be disassembled and replaced on the hopper 2 by the mutual screwing of the two sets of threads. The heat exchange coil 32 is spirally arranged between the outer wall of the hopper 2 and the inner wall of the outer sleeve 31, and the outer wall of the heat exchange coil 32 can be attached to the outer wall of the hopper 2 to transfer heat to the hopper 2 as much as possible. A portion of the heat exchange coil 32 is embedded in the inner wall of the outer sleeve 31 for fixed installation, and the top end of the heat exchange coil 32 extends to the outside of the outer sleeve 31 and is fixedly connected to a first pipe joint 321, which is fixedly connected to the other end of the water pipe 4 and is internally connected. The bottom end of the heat exchange coil 32 extends to the outside of the outer sleeve 31 and is fixedly connected to a second pipe joint 322, which is connected to the water inlet of the cooling tower through an external pipe.

[0030] In addition, the bottom end of the hopper 2 can be fixedly installed with a flange base 21 by bolt connection, and the flange base 21 is bolted to install the hopper 2 at the feed inlet of the injection molding machine. This design is to allow the heat recovery mechanism 3 to be removed and replaced from the bottom end of the hopper 2.

[0031] The working principle of this embodiment is as follows: by adding a heat recovery mechanism 3 to the outside of the hopper 2, the heat absorbed by the cooler 1 during the cooling process can be utilized in the form of preheating the plastic to be used for injection molding in the hopper 2 so that it can melt faster in the subsequent heating process, thereby improving the heating efficiency, that is, improving the energy utilization rate during the injection molding cooling process.

[0032] Specifically, the external coolant storage device uses a water pump to transport the coolant to the water inlet end of the cooling water pipe of the injection molding machine through a pipeline. After the coolant flows through the cooling water pipe for a circle and absorbs the heat of the injection molding machine, it flows into the pipe box 12 through the water outlet end of the cooling water pipe, the pipeline, and the hot liquid inlet 121, and then enters the heat dissipation pipe 13 from the end for heat exchange, and then re-enters the coolant storage device through the cold liquid outlet 122, waiting for the next cycle. At the same time, the circulating water of the external cooling water tower enters the shell 11 through the outlet, pipeline, and cold water inlet 111, takes away the heat of the heat dissipation pipe 13, and then enters the heat exchange coil 32 through the hot water outlet 112, the water pipe 4, and the first pipe joint 321 to circulate. During the circulation process, the plastic particles in the hopper 2 are preheated, and then return to the cooling water tower through the second pipe joint 322.

[0033] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. An injection molding cooling device, comprising a cooler (1), characterized in that: Also includes: A heat recovery mechanism (3) installed outside the hopper (2) and used to preheat the plastic in the hopper (2) using the heat absorbed by the cooler (1) during cooling, the heat recovery mechanism (3) comprising an outer sleeve (31) sleeved outside the hopper (2) and a heat exchange coil (32) installed inside the outer sleeve (31) and in contact with the wall of the hopper (2); A water guide pipe (4) is used to connect between the cooler (1) and the heat recovery mechanism (3) and to guide water.

2. An injection molding cooling device according to claim 1, characterized in that: The inner wall of the outer sleeve (31) matches the outer wall of the hopper (2) in size and shape.

3. An injection molding cooling device according to claim 2, characterized in that: The heat exchange coil (32) is spirally arranged between the outer wall of the hopper (2) and the inner wall of the outer sleeve (31).

4. An injection molding cooling device according to claim 3, characterized in that: The top end of the heat exchange coil (32) extends to the outside of the outer sleeve (31) and is connected to a first pipe joint (321); the first pipe joint (321) is fixedly connected to the water pipe (4) and communicates with the inside.

5. The injection molding cooling device according to claim 4, characterized in that: The bottom end of the heat exchange coil (32) extends to the outside of the outer sleeve (31) and is connected to a second pipe joint (322), and the second pipe joint (322) is connected to the water inlet of the cooling tower through an external pipe.

6. The injection molding cooling device according to claim 5, characterized in that: The inner wall at the top end of the outer sleeve (31) is threadedly connected to the outer wall at the top end of the hopper (2).

7. An injection molding cooling device according to claim 6, characterized in that: The bottom end of the hopper (2) is detachably fixedly connected to a flange base (21), and the hopper (2) is installed on the feed inlet of the injection molding machine via the flange base (21).

8. An injection molding cooling device according to claim 7, characterized in that: The cooler (1) comprises a shell (11), a pipe box (12) connected to both ends of the shell (11), and a heat dissipation pipe (13) installed inside the shell (11).

9. The injection molding cooling device according to claim 8, characterized in that: The shell (11) is provided with a cold water inlet (111) and a hot water outlet (112); the hot water outlet (112) is fixedly connected to the end of the water pipe (4) and is internally communicated; the cold water inlet (111) is connected to the water outlet of the cooling tower via a pipeline.

10. The injection molding cooling device according to claim 9, characterized in that: The two pipe boxes (12) are respectively provided with a hot liquid inlet (121) and a cold liquid outlet (122); the hot liquid inlet (121) is connected to a water outlet of a cooling water pipe of an injection molding machine via an external pipe, and the cold liquid outlet (122) is connected to a water inlet of a cooling water pipe of an injection molding machine via an external pipe.

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