Cooling device for machine barrel of injection molding machine

Abstract

The utility model relates to the field of injection molding machines, in particular to an injection molding machine barrel cooling device. The cooling device comprises a machine barrel and a cooling pipe ring, an annular cooling groove is formed in the machine barrel, and the cooling pipe ring made of copper or aluminum alloy is detachably arranged in the cooling groove. The cooling device further comprises a tightening pressing ring, the tightening pressing ring is provided with an annular opening, a hooping device is arranged at the annular opening, when the cooling pipe ring is embedded into the cooling groove, the tightening pressing ring is arranged on the surface of the cooling pipe ring from the annular opening in a sleeved mode and wraps the surface of the cooling pipe ring, and then the hooping device is tightened so that the cooling pipe ring can be hooped by the tightening pressing ring. After the technical scheme is adopted, compared with an existing steel cooling ring, the heat conductivity per unit area is higher, the cooling pipe ring can be detached to be cleaned, a steel wire soft brush or an anti-scaling agent is used for operation in another space, if a new cooling pipe ring is prepared, the new cooling pipe ring can be replaced in time for continuous production, and an injection molding machine does not need to be stopped for waiting.

Description

Technical Field

[0001] The utility model relates to the field of injection molding machines, in particular to a barrel cooling device for injection molding machines. Background Art

[0002] The operating temperature of a typical injection molding machine barrel currently ranges from 80°C to 350°C. The front half of the barrel, near the nozzle, typically houses a heating device that transfers heat to the barrel, which then transfers it to the material. The back half of the barrel, near the material inlet, is connected to the injection mechanism (such as the injection cylinder) and must be kept at a relatively low temperature to prevent the plastic material from overheating and prematurely softening and clumping. Heat transfer to the injection cylinder can cause premature aging of the cylinder seals, leading to oil leakage, and other mechanical transmission / lubrication components to degrade performance due to high temperatures, leading to failure. A cooling device is typically installed in the middle of the barrel, introducing cooling water to prevent the high temperature in the front half from being transferred to the back half.

[0003] Currently, the barrel cooling system of injection molding machines typically features an annular cooling water ring fixed to the barrel or drilled directly into the barrel itself. As the cooling water flows through the cooling water ring, it is heated and deposited with minerals that adhere to the inner pipes of the water ring. Over time, this buildup can clog the pipes, especially in equipment using untreated tap water or surface water. Excessive minerals can quickly accumulate and clog the cooling water ring, causing the injection molding machine to malfunction. Due to the narrow space in the cooling water ring after assembly and the numerous corners within the water ring pipes, a soft wire brush cannot be used to remove scale. Furthermore, the removal of a typical barrel cooling water ring requires shutting down the machine and removing the barrel first, which is labor-intensive and time-consuming, impacting maintenance efficiency. Utility Model Content

[0004] The utility model aims to provide a barrel cooling device for an injection molding machine which can be easily assembled and disassembled and has a good cooling effect.

[0005] The above purpose is achieved as follows:

[0006] The invention discloses a barrel cooling device for an injection molding machine, comprising a barrel and a cooling pipe ring. The barrel is provided with an annular cooling groove, and the cooling pipe ring made of copper or aluminum alloy is detachably arranged in the cooling groove.

[0007] It also includes a tightening pressure ring, which is provided with an annular opening and a clamping device at the annular opening. When the cooling tube ring is embedded in the cooling groove, the tightening pressure ring is inserted from the annular opening and wrapped around the surface of the cooling tube ring. Then, the clamping device is tightened to tighten the tightening pressure ring to tighten the cooling tube ring, and the gap between the tightening pressure ring, the cooling tube ring and the cooling groove is filled with heat-conducting material.

[0008] The purpose of the present invention can also be optimized by adopting the following technical measures.

[0009] Preferably, the cooling trough has a U-shaped cross-section, with the bottom radius of the cooling trough being the same as the radius of the cooling tube ring, and the total depth of the cooling trough being the same as the diameter of the cooling tube ring. The cooling tube ring, made of copper or aluminum alloy, has excellent thermal conductivity and is soft and flexible. When inserted into the cooling trough, the inner surface of the cooling tube ring is in close contact with the U-shaped bottom of the cooling trough, and the top surface of the cooling tube ring is flush with the barrel surface.

[0010] Preferably, the cooling pipe ring is provided with a connection structure at both ends for communicating with the cooling water supply device. The connection structure is a connection thread provided on the cooling pipe ring pipeline, which can be connected to the cooling water supply device extension pipe joint or the cooling water pipe.

[0011] Preferably, the tightening device includes buckle ears and a bolt and nut group with two ends of the tightening pressure ring bent into parallel shapes, and the buckle ears are provided with mounting holes for the bolt and nut group to pass through and tighten.

[0012] Preferably, the barrel has multiple cooling grooves, and the number of cooling grooves corresponds to the number of cooling tube rings. High-temperature heat from the front half of the barrel is transferred to the cooling tube rings through the cooling grooves as it travels toward the back half of the barrel, where it is then carried away by cooling water flowing through the cooling tube rings. The multiple cooling grooves enhance heat dissipation throughout the barrel.

[0013] Preferably, the heat-conducting material is thermal grease to achieve better heat-conducting effect.

[0014] After adopting the above technical solution, the utility model has the following advantages compared with the existing technology: the cooling pipe ring of the utility model adopts copper tubes or aluminum alloy tubes with good thermal conductivity. Compared with the existing steel cooling ring, the thermal conductivity per unit area is higher, which effectively saves design space.

[0015] The cooling pipe ring of the utility model adopts copper pipe or aluminum alloy pipe to contact cooling water. Compared with ordinary steel cooling devices, it has better chemical stability, can slow down the speed of scale formation, is not easy to rust, and reduces maintenance frequency.

[0016] Secondly, the cooling tube ring of the utility model adopts a soft and flexible copper tube or aluminum alloy tube, so that it can be directly removed or replaced without removing the barrel.

[0017] The cooling tube ring of the utility model can be disassembled for cleaning, and the cleaning operation can be carried out in another space using a soft steel wire brush or a descaling agent. If a new cooling tube ring is available, it can be replaced immediately for continuous production without stopping the injection molding machine to wait.

[0018] The utility model provides a cooling groove, making it easy to fix the cooling tube ring to the barrel surface, maximizing the contact area between the cooling tube ring and the barrel, which is beneficial for heat transfer. In addition, by filling the gap between the cooling tube ring, the tightening ring, and the cooling groove with thermal grease, the heat transfer efficiency is improved, allowing the water in the cooling tube ring to remove heat more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a barrel cooling device for an injection molding machine according to the present invention.

[0020] Figure 2 The utility model is a schematic diagram of the exploded structure of a barrel cooling device for an injection molding machine.

[0021] Figure 3 This is a cross-sectional view of a barrel cooling device for an injection molding machine according to the present invention.

[0022] Figure 4 for Figure 3 Magnified view of part C.

[0023] Figure 5 This is a schematic diagram of an injection molding machine barrel cooling device according to the present invention when no cooling pipe ring is installed.

[0024] Figure 6 Schematic diagram and cross-sectional view of the cooling tube ring.

[0025] Figure 7 Schematic diagram of three different angles for tightening the pressure ring.

[0026] In the figure: barrel 1, cooling tube ring 2, connecting structure 21, annular opening 22, air avoidance groove 23, tightening pressure ring 3, buckle ear 31, cooling groove 4, thermal grease 5, bolt and nut group 6. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] Combine Figure 1 An injection molding machine barrel cooling device includes a barrel 1, a cooling ring 2, and a tightening ring 3. The barrel 1 is provided with an annular cooling groove 4, and the cooling ring 2 is removably mounted within the cooling groove 4. The cooling ring 2 is made of a soft, flexible copper or aluminum alloy. The barrel 1 may have one or more cooling grooves 4, corresponding to the number of cooling rings 2.

[0029] Combine Figures 3 to 5The cross section of the cooling groove 4 is U-shaped. The semicircular diameter of the bottom surface of the cooling groove 4 is the same as the tube radius of the cooling tube ring 2. The total depth of the cooling groove 4 is the same as the tube diameter of the cooling tube ring 2. The cooling tube ring 2 is embedded in the cooling groove 4. The inner ring surface of the cooling tube ring 2 is closely attached to the U-shaped bottom of the cooling groove 4, and the top surface of the cooling tube ring 2 is flush with the surface of the barrel 1.

[0030] Combine Figure 6 The cooling tube ring 2 has a smooth, streamlined arc shape. Both ends of the cooling tube ring 2 are provided with connecting structures 21 for connecting with the extension pipe joints of the cooling water supply device or the cooling water pipe to connect the cooling water.

[0031] Combine Figure 7 , the tightening pressure ring 3 is provided with an annular opening 22, and the annular opening 22 can be provided on the surface of the cooling tube ring 2 by covering with tooling and tightening the cooling tube ring 2. The pressure ring body of the tightening pressure ring 3 is made of a thin steel plate or stainless steel sheet with a thickness of 0.5-1mm. The tightening pressure ring 3 can use tooling to change the size of the annular opening 22, so that it is more convenient to insert the tightening pressure ring 3 into the barrel 1. A tightening device is provided at the annular opening 22. In this embodiment, the tightening device includes buckle ears 31 bent into parallel at both ends of the opening of the tightening pressure ring 3 and a bolt and nut group 6, and a mounting hole is provided on the buckle ear 31. An air avoidance groove 23 is provided on the main body of the tightening pressure ring 3 and the buckle ear 31 to avoid interference with the connecting structure 21 during installation. In some embodiments, the tightening device can be a quick-release buckle for faster disassembly.

[0032] Combine Figure 2 The assembly process of the injection molding machine barrel cooling device is as follows: a small amount of heat-conducting material is applied to the bottom of the cooling groove 4 of the barrel 1. In this embodiment, the heat-conducting material is thermal grease 5. The cooling tube ring 2 is inserted into the cooling groove 4, and the tightening pressure ring 3 is covered on the cooling groove 4. Then, the thermal grease 5 is applied to the gap between the tightening pressure ring 3, the cooling tube ring 2, and the cooling groove 4. The buckle ears are tightened with the bolt and nut set 6 to tighten the tightening pressure ring 3, so that the cooling tube ring 2 is further fixed.

[0033] The following describes the maintenance and replacement process for the injection molding machine barrel cooling device: When the cooling ring 2 is clogged with scale and requires repair or replacement, remove the bolt and nut assembly 6 and use a tool to expand the annular opening 22 of the tightening ring 3. Remove the tightening ring 3 and cooling ring 2 directly from the machine. After removal, use a dedicated cleaning tool to remove scale and replace the thermal grease 5 in the cooling tank 4. Reinstall the cooling ring 2 according to the previous step or directly replace it with a new one.

[0034] The following are the practicalities of the barrel cooling device of the injection molding machine of the utility model:

[0035] In modern enterprises, injection molding machines typically operate 24 / 7 to save costs. When a machine is shut down for maintenance, personnel, equipment, and electricity are wasted. The introduction of this barrel cooling device reduces maintenance requirements, allowing replacement or maintenance to be completed as quickly as possible. This cooling device also reduces the cooling water quality requirements, making it more suitable for domestic small and medium-sized enterprises that lack specialized cooling water resources. This significantly improves production efficiency, enhances enterprise competitiveness, and has excellent economic and social value.

[0036] The terms "first" and "second" as used in this invention do not indicate any order, quantity, or importance, but are used only to distinguish. The terms "one" and "a kind" as used in this invention do not indicate a limit on quantity, but rather indicate the presence of at least one of the objects mentioned. The terms "top", "bottom", "side", "longitudinal", "lateral", "middle", "center", "outer", "inner", "horizontal", "vertical", "left", "right", "above", "below", etc. as used in this invention to indicate position or location are intended to reflect relative positions rather than absolute positions.

[0037] The above-described embodiments merely represent several implementation methods of the present invention. Although the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make several modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the appended claims.

Claims

1. A barrel cooling device for an injection molding machine, comprising a barrel and a cooling pipe ring, characterized in that: The barrel is provided with an annular cooling groove, and the cooling pipe ring made of copper or aluminum alloy is detachably arranged in the cooling groove; It also includes a tightening pressure ring, which is provided with an annular opening and a clamping device at the annular opening. When the cooling tube ring is embedded in the cooling groove, the tightening pressure ring is inserted from the annular opening and wrapped around the surface of the cooling tube ring. Then, the clamping device is tightened to tighten the tightening pressure ring to tighten the cooling tube ring, and the gap between the tightening pressure ring, the cooling tube ring and the cooling groove is filled with heat-conducting material.

2. The barrel cooling device for an injection molding machine according to claim 1, wherein: The cross section of the cooling groove is U-shaped, the bottom radius of the cooling groove is the same as the tube radius of the cooling tube ring, and the total depth of the cooling groove is the same as the tube diameter of the cooling tube ring.

3. The barrel cooling device for an injection molding machine according to claim 1, wherein: The clamping device includes buckle ears with two ends of the tightening pressure ring bent into parallel shapes and a bolt and nut group. The buckle ears are provided with mounting holes for the bolt and nut group to pass through and tighten.

4. The barrel cooling device for an injection molding machine according to claim 1, wherein: Both ends of the cooling pipe ring are provided with connection structures for communicating with the cooling water supply device.

5. The barrel cooling device for an injection molding machine according to claim 1, wherein: There are multiple cooling grooves on the barrel, and the number of cooling grooves corresponds to the number of cooling tube rings.

6. The barrel cooling device for an injection molding machine according to claim 1, wherein: The heat-conducting material is thermally conductive silicone grease.

Images