Internal cooling type injection mold

Abstract

According to the technical scheme, the internal cooling type injection mold is characterized in that the internal cooling type injection mold comprises a mold base, an injection molding assembly, a mold top cover and a cooling assembly, the mold top cover is detachably connected with the mold base, the injection molding assembly is installed between the mold top cover and the mold base, and the cooling assembly is arranged in the mold top cover; the cooling assembly comprises a water guide groove, a water guide channel, a sealing cover and a baffle, the water guide groove is formed in the side, away from the mold base, of the mold top cover, the water guide channel is formed in the mold top cover, the top of the water guide channel communicates with the water guide channel, and the bottom of the water guide channel is close to the injection molding assembly; according to the utility model, the water diversion groove, the water diversion channel and the baffle plate are matched to form a waterway pipeline system, and a flexible drilling device is not needed to drill a waterway pipeline, so that the production operation is simplified, and the waterway pipeline is simple in structure and convenient to maintain.

Description

Technical Field

[0001] The utility model relates to an injection mold, more specifically, it relates to an internal cooling type injection mold. Background Art

[0002] During the mold operation process, the cooling process plays a very important role in the molding quality, because it will directly affect the production efficiency of the mold and the intrinsic performance and apparent quality of the molded product. An excellent cooling system can significantly reduce the cooling time, shorten the injection molding cycle, reduce the residual thermal stress and warping deformation of the product, and enhance the mechanical properties and internal and surface quality of the product. In the prior art, cooling water pipes are divided into two types: internal cooling and external cooling. The external cooling type usually refers to covering the water pipe on the surface of the injection mold, and the internal cooling type refers to dividing the mold into additional parts when making the injection mold. Two layers, and then the water pipe is sandwiched between the two layers to form a sandwich structure. However, in actual use, it is found that since the water pipe itself is specially made, the material properties of the water pipe are quite different from those of the mold. The water pipe cannot be placed in and cast together when casting the mold. The water pipe can only be installed when the mold is assembled. Therefore, there must be a gap with the injection mold. This gap will cause the water pipe to be easily damaged. It is time-consuming and laborious to drill out the water pipe directly in the mold, and the water pipe is difficult to maintain. Therefore, an internally cooled injection mold is needed. The water pipe in the device has a simple structure and is easy to maintain.

[0003] In view of the above reasons, how to design the water pipeline so that the water pipeline structure is simple and easy to maintain is exactly the problem considered in this application. Utility Model Content

[0004] In view of the shortcomings of the prior art, an internal cooling injection mold is provided. The water pipeline structure in the device is simple and easy to maintain.

[0005] To achieve the above-mentioned purpose, the following technical scheme is provided: an internally cooled injection mold, comprising a mold base, an injection molding component, a mold top cover and a cooling component, wherein the mold top cover is detachably connected to the mold base, the injection molding component is installed between the mold top cover and the mold base, the cooling component is arranged in the mold top cover, the cooling component comprises a water diversion groove, a water diversion channel, a sealing cover and a baffle, the water diversion groove is arranged on a side of the mold top cover away from the mold base, the water diversion channel is arranged inside the mold top cover, the top of the water diversion channel is connected to the water diversion channel, the bottom of the water diversion channel is close to the injection molding component, the baffle is fixedly connected to the sealing cover, and the baffle is inserted into the water diversion channel;

[0006] When the baffle is inserted into the water diversion channel, the side wall of the baffle abuts against the inner wall of the water diversion groove and the inner wall of the water diversion channel, and a gap is provided between the bottom of the baffle and the bottom of the water diversion channel.

[0007] In summary, the above technical solution has the following beneficial effects: in addition to sandwiching the water pipe between two layers to form a sandwich structure, the internal cooling type in the prior art can also choose to drill a bend pipe in the mold, and multiple bend pipes are interconnected. For the sake of cooling efficiency and safety, the injection mold will not choose the sandwich structure. The method of drilling a bend pipe in the mold can also form a water pipe for the circulation of the coolant, but drilling a bend pipe in the mold is a relatively complex project, requiring the tool to be able to flexibly turn and position inside the mold. A common method is to use a flexible drilling device to flexibly turn and position the mold through a soft drill rod to drill out the bend pipe, but the space inside the mold is usually very limited and the shape is complex, which increases the difficulty of drilling the bend pipe. Accurate turning and positioning are required in a limited space, resulting in the need for a more expensive flexible drilling device. In addition, the mold material usually has a higher hardness, which makes the drilling process more difficult and requires the use of a harder drill bit, which further leads to the actual operation cost of drilling the bend pipe. Therefore, this method is avoided as much as possible in the actual production process;

[0008] In the present invention, no independent water pipeline is provided, and a water pipeline system is formed by the cooperation of the water diversion trough, the water diversion channel and the baffle. Since the side wall of the baffle abuts against the inner wall of the water diversion trough and the inner wall of the water diversion channel, and the bottom of the baffle maintains a certain distance from the bottom of the water diversion channel, under the action of the baffle, the two ends of the water diversion channel are relatively independent at the top, and connected at the bottom, forming a shape similar to a curved water pipe, so there is no need to drill a curved pipeline, only a common hole-shaped structure needs to be drilled as a water diversion channel, and then the baffle is installed. The water diversion channel separated by the baffle forms a structure similar to a U-shaped tube, which allows the coolant to flow completely in the water diversion channel. Such a water pipeline structure is simple and easy to maintain, and the baffle is fixedly connected to the sealing cover. When the sealing cover is removed to maintain the water diversion trough, the water diversion channel and the baffle can be separated, thereby improving maintenance efficiency.

[0009] In addition, if no baffle is set, the coolant in the water diversion channel is usually stationary, and there is a boundary layer in the water diversion trough between the coolant and the flowing coolant. The coolant flow speed in this boundary layer is slower, which will make it difficult for the coolant in the water diversion channel to flow together with the coolant in the water diversion trough, ultimately resulting in a deterioration in the coolant circulation effect and affecting the overall heat dissipation efficiency.

[0010] The utility model forms a water pipeline system by cooperating the water diversion trough, the water diversion channel and the baffle plate, and does not need to use a flexible drilling device to drill out the water pipeline, thereby simplifying the production operation, and the water pipeline has a simple structure and is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1It is a schematic diagram of the three-dimensional structure of an internal cooling injection mold;

[0012] Figure 2 It is a schematic diagram of the three-dimensional structure of the top cover of the mold in the utility model;

[0013] Figure 3 It is a top view of the cross-section of the top cover of the mold in the utility model;

[0014] Figure 4 It is a side cross-sectional view of the middle baffle of the utility model;

[0015] Figure 5 It is a schematic diagram of the three-dimensional structure after the mold top cover is removed in the utility model;

[0016] Figure 6 This is a partial exploded view after the mold top cover is removed in the utility model.

[0017] Reference numerals: 1. mold base; 2. injection molding assembly; 3. mold top cover; 4. cooling assembly;

[0018] 11. first containing tank; 12. second containing tank; 13. exhaust duct;

[0019] 21. injection molding core; 22. first sealing ring; 23. second sealing ring; 24. first plug-in connector; 25. second plug-in connector; 26. first guide rail; 27. second guide rail;

[0020] 211, first core; 212, second core;

[0021] 221, first plug-in slot; 231, second plug-in slot;

[0022] 261, first moving device; 262, first connecting plate; 271, second moving device; 272, second connecting plate;

[0023] 31. Injection channel;

[0024] 41. Water diversion trough; 42. Water diversion channel; 43. Sealing cover; 44. Baffle; 45. Water inlet pipe; 46. Water outlet pipe. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0026] Reference Figure 1-6As shown, the internal cooling type injection mold comprises a mold base 1, an injection molding component 2, a mold top cover 3 and a cooling component 4, the mold top cover 3 is detachably connected to the mold base 1, the injection molding component 2 is installed between the mold top cover 3 and the mold base 1, the cooling component 4 is arranged in the mold top cover 3, the cooling component 4 comprises a water diversion groove 41, a water diversion channel 42, a sealing cover 43 and a baffle 44, the water diversion groove 41 is arranged on a side of the mold top cover 3 away from the mold base 1, the water diversion channel 42 is arranged inside the mold top cover 3, the top of the water diversion channel 42 is communicated with the water diversion channel 42, the bottom of the water diversion channel 42 is close to the injection molding component 2, the baffle 44 is fixedly connected to the sealing cover 43, and the baffle 44 is inserted into the water diversion channel 42;

[0027] When the baffle 44 is inserted into the water diversion channel 42, the side wall of the baffle 44 abuts against the inner wall of the water diversion groove 41 and the inner wall of the water diversion channel 42, and a gap is provided between the bottom of the baffle 44 and the bottom of the water diversion channel 42;

[0028] In the prior art, in addition to sandwiching the water pipe between two layers to form a sandwich structure, the internal cooling type can also choose to drill a bend pipe in the mold, and multiple bend pipes are interconnected. For the sake of cooling efficiency and safety, the injection mold will not choose the sandwich structure. The method of drilling a bend pipe in the mold can also form a water pipe for the circulation of the coolant, but drilling a bend pipe in the mold is a relatively complex project, requiring the tool to be able to flexibly turn and position inside the mold. A common method is to use a flexible drilling device to flexibly turn and position inside the mold through a soft drill rod to drill out the bend pipe, but the space inside the mold is usually very limited and the shape is complex, which increases the difficulty of drilling the bend pipe. Precise turning and positioning are required in a limited space, resulting in the need for a more expensive flexible drilling device. In addition, the mold material usually has a higher hardness, which makes the drilling process more difficult and requires the use of a harder drill bit, which further leads to the actual operation cost of drilling the bend pipe. Therefore, this method is avoided as much as possible in the actual production process;

[0029] In the present invention, no independent water pipeline is provided. A water pipeline system is formed by the cooperation of the water diversion groove 41, the water diversion channel 42 and the baffle plate 44. Since the side wall of the baffle plate 44 abuts against the inner wall of the water diversion groove 41 and the inner wall of the water diversion channel 42, the bottom of the baffle plate 44 maintains a certain distance from the bottom of the water diversion channel 42. Therefore, under the action of the baffle plate 44, the two ends of the water diversion channel 42 are relatively independent at the top, and connected at the bottom, forming a shape similar to a curved water pipe. In this way, there is no need to drill a curved pipe. Only a common hole-shaped structure needs to be drilled as the water diversion channel 42, and then the baffle plate 44 is installed. The water diversion channel 42 separated by the baffle plate 44 forms a structure similar to a U-shaped tube, so that the coolant can flow completely in the water diversion channel 42. Such a water pipeline structure is simple and easy to maintain. The baffle plate 44 is fixedly connected to the sealing cover 43. When the sealing cover 43 is removed to maintain the water diversion groove 41, the water diversion channel 42 and the baffle plate 44 can be separated, thereby improving the maintenance efficiency.

[0030] In addition, if the baffle 44 is not provided, the coolant in the water diversion channel 42 is usually stationary, and there is a boundary layer in the water diversion groove 41 between the coolant and the flowing coolant. The coolant flow speed in this boundary layer is relatively slow, which will cause the coolant in the water diversion channel 42 to be difficult to flow together with the coolant in the water diversion groove 41, ultimately resulting in a deterioration in the coolant circulation effect, affecting the overall heat dissipation efficiency.

[0031] The utility model forms a water pipeline system by cooperating the water diversion groove 41, the water diversion channel 42 and the baffle plate 44. It is not necessary to use a flexible drilling device to drill out the water pipeline, thereby simplifying the production operation. The water pipeline has a simple structure and is easy to maintain.

[0032] Furthermore, the cooling assembly 4 further includes a water inlet pipe 45 and a water outlet pipe 46. The number of water diversion channels 42 is provided in plurality. The water inlet pipe 45 and the water outlet pipe 46 are respectively connected to the two water diversion channels 42 at both ends of the water diversion groove 41.

[0033] The water diversion groove 41 is bent and extended to form a fan shape, and a plurality of water inlet pipes 45 and water outlet pipes 46 are provided, and are respectively connected to different water diversion channels 42;

[0034] Since the water diversion groove 41 forms a relatively closed space through the sealing cover 43 during use, it is impossible to add coolant to the water diversion groove 41, and adding coolant to the water diversion groove 41 is not conducive to the circulation of the coolant, so a water inlet pipe 45 and a water outlet pipe 46 are provided, and the coolant is added through the water inlet pipe 45, and the added coolant can flow out from the water outlet pipe 46, and the water inlet pipe 45 and the water outlet pipe 46 are respectively connected to the two water diversion channels 42 at both ends of the water diversion groove 41 to ensure that all water diversion channels 42 can participate in the circulation of the coolant;

[0035] In addition, in order to increase the number of water diversion channels 42 as much as possible, the water diversion trough 41 is bent and extended to form a fan shape, and in order to avoid the situation where the water inlet pipe 45 or the water outlet pipe 46 cannot be used somewhere and cause the operation to be terminated, multiple water inlet pipes 45 and water outlet pipes 46 are set as insurance.

[0036] Further, the injection molding assembly 2 includes an injection molding core 21, a first sealing ring 22 and a second sealing ring 23, the first sealing ring 22 and the second sealing ring 23 are both slidably connected to the mold base 1, the first sealing ring 22 and the second sealing ring 23 are both detachably connected to the mold top cover 3, the first sealing ring 22 and the second sealing ring 23 are respectively installed at both ends of the injection molding core 21, and the first sealing ring 22, the second sealing ring 23, the mold base 1 and the mold top cover 3 form a closed injection molding space;

[0037] The first sealing ring 22, the second sealing ring 23, the mold base 1 and the mold top cover 3 form a closed injection space as the basic structure of the injection molding operation. Different shapes can be injection-molded according to the injection molding core 21 used. The injection molding core 21 is suspended by the first sealing ring 22 and the second sealing ring 23, so as to achieve better injection molding. The entire sealed space is arranged on the outer layer, which is easier to cool and dissipate heat through water pipes.

[0038] Further, the injection molding component 2 also includes a first connector 24 and a second connector 25, the first connector 24 and the second connector 25 are both fixedly connected to the mold top cover 3, the first sealing ring 22 is provided with a first plug-in groove 221, the second sealing ring 23 is provided with a second plug-in groove 231, and the mold base 1 is provided with a first receiving groove 11 and a second receiving groove 12, the inner wall of the first plug-in groove 221 and the inner wall of the first receiving groove 11 are both in conflict with the first connector 24, and the inner wall of the second plug-in groove 231 and the inner wall of the second receiving groove 12 are both in conflict with the second connector 25;

[0039] Since the mold base 1 and the mold top cover 3 can form a limit, the first sealing ring 22 and the second sealing ring 23 only need to form a limit in the installation direction. The first connector 24 simultaneously contacts the inner wall of the first plug-in groove 221 and the inner wall of the first receiving groove 11 to prevent the first sealing ring 22 from moving. Usually, the first connector 24, the first plug-in groove 221 and the first receiving groove 11 are provided with two groups, and are symmetrically distributed on both sides of the first sealing ring 22 to prevent the first sealing ring 22 from tilting and moving. The second connector 25, the second plug-in groove 231 and the second receiving groove 12 are arranged in the same way.

[0040] Furthermore, one end of the first connector 24 is inclined toward the mold base 1, the inner wall of the first receiving groove 11 is inclined and abuts against the side wall of the first connector 24, and one end of the second connector 25 is inclined toward the mold base 1, the inner wall of the second receiving groove 12 is inclined and abuts against the side wall of the second connector 25;

[0041] The contact surfaces between the first connector 24 and the first receiving groove 11 and the contact surfaces between the second connector 25 and the second receiving groove 12 are all inclined. The inclined contact surfaces provide better guidance for the first connector 24 and the second connector 25 during plugging and unplugging, thereby reducing the difficulty of plugging and unplugging. The inclined contact surface design helps to reduce friction and wear during plugging and unplugging, thereby extending the service life of the first connector 24 and the second connector 25.

[0042] Furthermore, the injection core 21 includes a first core 211 and a second core 212 . The first core 211 and the second core 212 are connected to form an “L” shape. The first core 211 is fixedly connected to the first sealing ring 22 , and the second core 212 is fixedly connected to the second sealing ring 23 .

[0043] Further, the injection molding assembly 2 also includes a first guide rail 26, a first moving device 261, a first connecting plate 262, a second guide rail 27, a second moving device 271 and a second connecting plate 272, the first moving device 261 is fixedly connected to the first guide rail 26, the moving end of the first moving device 261 is fixedly connected to the first connecting plate 262, the first connecting plate 262 is fixedly connected to the first sealing ring 22, the first connecting plate 262 is slidably connected to the first guide rail 26, the second moving device 271 is fixedly connected to the second guide rail 27, the moving end of the second moving device 271 is fixedly connected to the second connecting plate 272, the second connecting plate 272 is fixedly connected to the second sealing ring 23, and the second connecting plate 272 is slidably connected to the second guide rail 27;

[0044] Since the first core 211 and the second core 212 form an "L" shape after abutting each other, which is used for injection molding to form an "L" shaped pipeline, the first moving device 261 and the second moving device 271 are used to drive and separate the first core 211 and the second core 212 during the demolding process. In order to be able to quickly perform the injection molding operation again, the moving trajectory is limited by the first guide rail 26 and the second guide rail 27.

[0045] Furthermore, the mold base 1 is provided with an exhaust duct 13, which is connected to the inside and outside of the closed injection molding space formed by the first sealing ring 22, the second sealing ring 23, the mold base 1 and the mold top cover 3. There are multiple exhaust ducts 13 and they are connected to each other.

[0046] The main reason for setting the exhaust duct 13 in the injection mold is to ensure the smooth filling of the plastic melt, avoid surface defects of the injection molded parts, improve production efficiency and optimize the injection molding process. These measures are helpful to improve the appearance and performance quality of the injection molded parts and meet the design requirements and use performance of the products. In addition, the exhaust duct 13 can also be used for gas exchange and assist the water cooling pipe in cooling and heat dissipation.

[0047] Furthermore, the mold top cover 3 is provided with an injection channel 31 .

[0048] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. Internal cooling injection mold, characterized in that: The mold base includes a mold top cover, an injection molding component, a mold top cover and a cooling component. The mold top cover is detachably connected to the mold base. The injection molding component is installed between the mold top cover and the mold base. The cooling component is arranged in the mold top cover. The cooling component includes a water diversion groove, a water diversion channel, a sealing cover and a baffle. The water diversion groove is arranged on a side of the mold top cover away from the mold base. The water diversion channel is arranged inside the mold top cover. The top of the water diversion channel is communicated with the water diversion channel. The bottom of the water diversion channel is close to the injection molding component. The baffle is fixedly connected to the sealing cover. The baffle is inserted into the water diversion channel. When the baffle is inserted into the water diversion channel, the side wall of the baffle abuts against the inner wall of the water diversion groove and the inner wall of the water diversion channel, and a gap is provided between the bottom of the baffle and the bottom of the water diversion channel.

2. The internally cooled injection mold according to claim 1, characterized in that: The cooling assembly also includes a water inlet pipe and a water outlet pipe. The number of the water diversion channels is multiple, and the water inlet pipe and the water outlet pipe are respectively connected to the two water diversion channels at both ends of the water diversion trough.

3. The internally cooled injection mold according to claim 2, characterized in that: The water diversion trough is bent and extended to form a fan shape. A plurality of water inlet pipes and a plurality of water outlet pipes are provided, and are respectively communicated with different water diversion channels.

4. The internally cooled injection mold according to claim 1, characterized in that: The injection molding component includes an injection molding core, a first sealing ring and a second sealing ring. The first sealing ring and the second sealing ring are both slidably connected to the mold base. The first sealing ring and the second sealing ring are both detachably connected to the mold top cover. The first sealing ring and the second sealing ring are respectively installed at both ends of the injection molding core. The first sealing ring, the second sealing ring, the mold base and the mold top cover form a closed injection molding space.

5. The internally cooled injection mold according to claim 4, characterized in that: The injection molding component also includes a first connector and a second connector, the first connector and the second connector are both fixedly connected to the mold top cover, the first sealing ring is provided with a first connector groove, the second sealing ring is provided with a second connector groove, and the mold base is provided with a first receiving groove and a second receiving groove, the inner wall of the first connector groove and the inner wall of the first receiving groove both abut against the first connector, and the inner wall of the second connector groove and the inner wall of the second receiving groove both abut against the second connector.

6. The internally cooled injection mold according to claim 5, characterized in that: One end of the first connector is inclined toward the mold base, the inner wall of the first accommodating groove is inclined and abuts against the side wall of the first connector, and one end of the second connector is inclined toward the mold base, the inner wall of the second accommodating groove is inclined and abuts against the side wall of the second connector.

7. The internally cooled injection mold according to claim 5, characterized in that: The injection molding core includes a first core and a second core. The first core and the second core are connected to form an "L" shape. The first core is fixedly connected to a first sealing ring, and the second core is fixedly connected to a second sealing ring.

8. The internally cooled injection mold according to claim 5, characterized in that: The injection molding assembly also includes a first guide rail, a first moving device, a first connecting plate, a second guide rail, a second moving device and a second connecting plate. The first moving device is fixedly connected to the first guide rail, the moving end of the first moving device is fixedly connected to the first connecting plate, the first connecting plate is fixedly connected to the first sealing ring, the first connecting plate is slidably connected to the first guide rail, the second moving device is fixedly connected to the second guide rail, the moving end of the second moving device is fixedly connected to the second connecting plate, the second connecting plate is fixedly connected to the second sealing ring, and the second connecting plate is slidably connected to the second guide rail.

9. The internally cooled injection mold according to claim 1, characterized in that: The mold base is provided with an exhaust duct, which communicates with the inside and outside of a closed injection molding space formed by the first sealing ring, the second sealing ring, the mold base and the mold top cover. A plurality of exhaust ducts are provided and are interconnected.

10. The internally cooled injection mold according to claim 1, characterized in that: The mold top cover is provided with an injection channel.

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