Waterway structure for threaded core mold

Abstract

The invention relates to the technical field of injection molds, and particularly discloses a waterway structure for a threaded core mold, the waterway structure comprises a mold frame, fixed molds and a movable mold, the fixed molds and the movable mold are mounted on the mold frame, and mold cores for injection molding of workpieces are arranged between the fixed molds; a cooling piece for cooling the mold core is arranged on the mold frame; the cooling part comprises a cooling box installed on the mold frame, and a circulation unit communicated with the interior of the mold core is arranged on the cooling box. The circulating unit on the cooling box communicates with the interior of the mold core, so that a workpiece in the mold core can be cooled, the cooling efficiency of the workpiece is improved, and the cooling medium in the circulating unit of the cooling box is heated after long-term use, so that the circulating unit is cooled through the heat dissipation unit at the moment, and the cooling efficiency of the workpiece is improved. Therefore, the cooling medium in the circulation unit can be kept at a low temperature all the time, and the temperature in the circulation unit is kept constant.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to a water channel structure for a threaded core mold. Background Art

[0002] Injection mold is a tool for producing plastic products. It is also a tool that gives plastic products a complete structure and precise size. When using injection molds for molding, the completely molten plastic material is stirred by a screw at a certain temperature and injected into the mold cavity with high pressure. After cooling and solidification, the molded product is obtained. Injection molds are suitable for mass production of parts with complex shapes and are one of the important processing methods.

[0003] The injection mold is mainly composed of a movable mold and a fixed mold, as well as a pouring system, a temperature control system, molding parts and structural parts. Among them, the pouring system and molding parts need to be in direct contact with the injection molding raw materials, and need to change with the quality requirements of the raw materials and products. The pouring system refers to the flow channel part before the raw material enters the cavity from the nozzle, including the main channel, cold material hole, branch channel and gate, etc. The raw material is injected into the injection mold after heating, and after cooling and pressing of the injection mold, it falls off from the mold to complete the molding process.

[0004] Due to the wide variety of plastics and processing methods, the structures of plastic molding machines and plastic products vary in complexity, so the types and structures of plastic molds are also diverse. Plastic molds are needed for production and processing in various fields such as industry and life. Many products in the cosmetics field are packaged in plastic products. For example, cosmetic pens are products formed by plastic molds. The surface requirements of the pen cap of cosmetic pens are very high. When designing the mold, backflow is used to inject glue (the flow channel must be injected from the core). Therefore, during the production process, the small core (about 7.5mm in diameter) has a flow channel passing through it, and the core temperature is high. Therefore, the core needs to be effectively cooled to ensure the normal operation of the mold.

[0005] For example, the Chinese patent application number is 201920214185.4, the authorization announcement number is CN209633655U, and the name is a plastic mold with a cooling water channel structure for a male mold core. The above patent discloses a plastic mold with a cooling water channel structure for a male mold core, including an upper mold base, a lower mold base, a front mold core, and a rear mold core. The front mold core and the rear mold core are provided with inserts, and a cavity is provided between the insert and the front mold core. An ejector pin is provided in the lower mold base, and the insert A first clearance hole for the ejector to pass through is provided through the lower die base, a water collecting block is provided in the lower die base, the water collecting block is provided with a second clearance hole coaxial with and communicated with the first clearance hole, a cooling hole for the water collecting block to extend into is provided at the bottom of the insert along its length direction, two cooling water grooves are provided on the outer wall of the water collecting block along its length direction, a rotating water groove connecting the two cooling water grooves is provided at one end of the water collecting block near the cavity, and a water inlet and a water outlet communicated with the two cooling water grooves are respectively provided in the lower die base.

[0006] The above-mentioned water collecting block is used to turn the circulating water into the insert. The circulating water enters from the water inlet, passes through the cooling water trough and the water transfer trough, and is sent out from the water outlet to act on the inner wall of the cooling hole of the insert to achieve a uniform cooling effect. It is well known that the injection mold needs to operate for a long time during the injection molding process. Therefore, the coolant inside the injection mold needs to transfer the heat inside the mold core continuously for a long time to achieve the effect of cooling the mold core. However, long-term circulation will cause the temperature of the coolant to rise. At this time, the cooling effect of the coolant entering the mold core on the mold core will be weakened, which will affect the cooling efficiency of the workpiece to a certain extent, and there are certain shortcomings. Summary of the invention

[0007] The object of the present invention is to provide a water channel structure for a threaded core mold to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a water channel structure for a threaded core mold, comprising a mold frame and a fixed mold and a movable mold installed on the mold frame, a mold core for injection molding a workpiece is arranged between the fixed mold and the fixed mold; a cooling member for cooling the mold core is arranged on the mold frame; the cooling member comprises a cooling box installed on the mold frame, a circulation unit connected to the inside of the mold core is arranged on the cooling box, and a heat dissipation unit for cooling the circulation unit is also arranged inside the cooling box; when working, the heat dissipation unit dissipates heat to the circulation unit so that the temperature inside the circulation unit remains constant, which is used to dissipate heat to the mold core.

[0009] Furthermore, the circulation unit includes a water inlet pipe and a water outlet pipe installed on the cooling box, and a circulation pump is arranged inside the cooling box, the water inlet pipe and the water outlet pipe are respectively arranged on both sides of the circulation pump, and the sides of the water inlet pipe and the water outlet pipe away from the circulation pump are respectively installed on the movable mold through fasteners.

[0010] Furthermore, heat dissipation fins are provided on one side of the water inlet pipe and the water outlet pipe located inside the cooling box.

[0011] Furthermore, the heat dissipation unit includes a mounting frame fixedly connected to the cooling box, a mounting block is slidably connected to the mounting frame, and a heat dissipation fan is installed on the mounting block through a connecting shaft; and a transmission member is also provided between the connecting shaft and the mounting frame. When the mounting block slides on the mounting frame, the heat dissipation fan is driven to rotate through the transmission member to dissipate heat from the heat-conducting fins.

[0012] Furthermore, the transmission member includes a driving gear installed on the connecting shaft, and a rack is fixedly connected to the mounting frame, and the driving gear is meshed with the rack; a positioning block is also slidably connected to the mounting frame, an annular groove is provided on the positioning block, and a limiting ring is fixedly connected to the connecting shaft, and the limiting ring is rotatably connected to the annular groove to improve the stability of the connecting shaft during rotation.

[0013] Furthermore, a driving member for driving the mounting block to slide is provided on the mounting frame, and the driving member includes a driving screw rotatably connected to the mounting frame, the driving screw is threadedly connected to the mounting block, and the two driving screws are connected by a first synchronous member, and a servo motor is installed on the cooling box, and the servo motor is coaxially connected to one of the driving screws.

[0014] Furthermore, a first limiting member is provided between the mounting block and the mounting frame, and a second limiting member is provided between the positioning block and the mounting frame.

[0015] Furthermore, a threaded core is rotatably connected to the inside of the movable mold through a rotating frame, and the mold core is installed on the threaded core; a water collecting block is installed inside the movable mold, and the water inlet pipe and the water outlet pipe are respectively connected to the water collecting block through a conveying channel, and a cooling pipe is installed on the threaded core, and the cooling pipe is connected to the water collecting block; and a cross sealing ring and an anisotropic sealing ring are installed on the threaded core to achieve a sealing effect.

[0016] Furthermore, the driving member includes a driving ring installed inside the movable mold, a first gear is provided on the driving ring, and a second gear is installed on the threaded core, the first gear is meshed with the second gear; and a motor for driving the driving ring to rotate is provided on the mold frame.

[0017] Furthermore, a wear-resistant sleeve is provided between the threaded core and the movable mold.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the water channel structure for the threaded core mold, when the injection mold is used, the circulation unit on the cooling box is connected with the inside of the mold core, so that the workpiece inside the mold core can be cooled to improve the cooling efficiency of the workpiece. After long-term use, the cooling medium in the circulation unit of the cooling box may heat up. At this time, the circulation unit is dissipated by the heat dissipation unit, so that the cooling medium inside the circulation unit can always maintain a low temperature, and the temperature inside the circulation unit can be kept constant, avoiding the cooling medium inside the circulation unit from heating up, so as to meet the subsequent cooling operations of the mold core and the workpiece, thereby avoiding affecting the cooling effect of the injection mold, greatly improving the cooling efficiency of the injection mold, and having excellent use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A schematic diagram of the internal structure of a movable mold provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0022] Figure 3 A partial schematic diagram of the interior of a cooling box provided by an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the structure of the installation method of the driving member provided in an embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the structure of the heat dissipation fan installation method provided in an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of the structure of a heat dissipation fan provided in an embodiment of the present invention being arranged inside a mounting frame;

[0026] Figure 7 for Figure 6 Status front view;

[0027] Figure 8 for Figure 7 Schematic diagram of the AA section structure along the middle edge;

[0028] Fig. 9 for Figure 7 Schematic diagram of the cross-sectional structure along the middle edge BB;

[0029] Fig.10 A schematic diagram of the structure of the positioning block and the mounting frame in a separated state provided by an embodiment of the present invention;

[0030] Fig.11 A schematic diagram of the local structure of a transmission component provided in an embodiment of the present invention.

[0031] Explanation of the accompanying drawings: 1. mold frame; 2. movable mold; 3. mold core; 4. workpiece; 5. water collecting block; 6. cooling pipe; 7. wear-resistant sleeve; 8. cross sealing ring; 9. anisotropic sealing ring; 10. driving ring; 11. fixed mold; 12. first gear; 13. second gear; 14. threaded core; 15. cooling box; 16. water inlet pipe; 17. water outlet pipe; 19. fastener; 20. cooling fin; 21. circulating pump; 22. mounting frame; 23. cooling fan; 24. mounting block; 25. driving screw; 26. first synchronous member; 27. servo motor; 28. connecting shaft; 29. ​​driving gear; 30. rack; 31. limiting ring; 32. positioning block; 33. first limiting member; 34. second limiting member; 35. second synchronous member. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-Figure 11 The present invention provides a technical solution: a water channel structure for a threaded core 14 mold, comprising a mold frame 1, a fixed mold 11 and a movable mold 2 installed on the mold frame 1, a mold core 3 for injecting a workpiece 4 is arranged between the fixed mold 11 and the fixed mold 11; a cooling member for cooling the mold core 3 is arranged on the mold frame 1; the cooling member comprises a cooling box 15 installed on the mold frame 1, a circulation unit connected to the inside of the mold core 3 is arranged on the cooling box 15, and a heat dissipation unit for cooling the circulation unit is also arranged inside the cooling box 15; when working, the heat dissipation unit dissipates heat to the circulation unit so that the temperature inside the circulation unit remains constant, which is used to dissipate heat to the mold core 3.

[0034] Specifically, the water channel structure for the threaded core 14 mold includes a mold frame 1, a fixed mold 11 installed on the mold frame 1, and a movable mold 2. A mold core 3 for injecting a workpiece 4 is arranged between the fixed mold 11 and the fixed mold 11 to meet the injection molding needs of the workpiece 4. A cooling member for cooling the mold core 3 is arranged on the mold frame 1. Through the circulation of the cooling medium, the heat inside the mold is taken away, thereby controlling the temperature distribution of the mold, ensuring that the temperature of each part of the mold is uniform, avoiding residual stress caused by uneven temperature, and then reducing the shrinkage and deformation of the product. Uniform cooling can reduce the residual stress caused by uneven heat conduction, control the warping of the product, maintain the dimensional accuracy and stability of the molded product, thereby improving the quality of the product. In addition, an effective cooling circuit design can reduce the cooling time and increase the total production volume. By quickly reducing the mold temperature to the set temperature, the product quality is ensured while shortening the production cycle. The design optimization of the cooling system can reduce the cooling time and improve production efficiency.

[0035] Specifically, the cooling member includes a cooling box 15 installed on the mold frame 1, wherein a coolant storage tank is arranged inside the cooling box 15, and a circulation unit connected to the inside of the mold core 3 is arranged on the cooling box 15, so as to facilitate cooling and dissipating heat of the mold core 3. A heat dissipation unit for cooling the circulation unit is also arranged inside the cooling box 15, so that the circulation unit can dissipate heat, so that the circulation unit can maintain a low temperature to meet the subsequent cooling operation of the mold core 3 and the workpiece 4. Specifically, when working, the heat dissipation unit dissipates heat from the circulation unit so that the temperature inside the circulation unit remains constant, which is used to dissipate heat from the mold core 3.

[0036] At this moment, when the injection mold is used, the circulation unit on the cooling box 15 is connected to the inside of the mold core 3, so that the workpiece 4 inside the mold core 3 can be cooled to improve the cooling efficiency of the workpiece 4. After long-term use, the cooling medium in the circulation unit of the cooling box 15 may heat up. At this moment, the circulation unit is dissipated by the heat dissipation unit, so that the cooling medium inside the circulation unit can always maintain a low temperature, and the temperature inside the circulation unit can be kept constant, avoiding the cooling medium inside the circulation unit from heating up, so as to meet the subsequent cooling operations of the mold core 3 and the workpiece 4, thereby avoiding affecting the cooling effect of the injection mold, greatly improving the cooling efficiency of the injection mold, and having excellent use effect.

[0037] In the embodiment provided by the present invention, specifically, the circulation unit includes a water inlet pipe 16 and a water outlet pipe 17 installed on the cooling box 15, and a circulation pump 21 is arranged inside the cooling box 15, the water inlet pipe 16 and the water outlet pipe 17 are respectively arranged on both sides of the circulation pump 21, and the sides of the water inlet pipe 16 and the water outlet pipe 17 away from the circulation pump 21 are respectively installed on the movable mold 2 through fasteners 19, specifically, the fasteners 19 can be fastening bolts to facilitate the stability of the water inlet pipe 16 and the water outlet pipe 17 during installation.

[0038] In the embodiment provided by the present invention, a heat sink 20 is also provided on one side of the water inlet pipe 16 and the water outlet pipe 17 located inside the cooling box 15. Specifically, the heat sink 20 has high thermal conductivity, so that the water inside the water inlet pipe 16 and the water outlet pipe 17 can be smoothly discharged, which facilitates the cooling of the cooling medium inside the water inlet pipe 16 and the water outlet pipe 17, and the use effect is better.

[0039] In the embodiment provided by the present invention, the heat dissipation unit includes a mounting frame 22 fixedly connected to the cooling box 15, a mounting block 24 is slidably connected to the mounting frame 22, and a heat dissipation fan 23 is installed on the mounting block 24 through a connecting shaft 28; and a transmission member is also provided between the connecting shaft 28 and the mounting frame 22, when the mounting block 24 slides on the mounting frame 22, the heat dissipation fan 23 is driven to rotate through the transmission member to dissipate heat from the heat-conducting fins. The transmission member includes a driving gear 29 installed on the connecting shaft 28, and a rack 30 is fixedly connected to the mounting frame 22, and the driving gear 29 is meshed with the rack 30; a positioning block 32 is also slidably connected to the mounting frame 22, and an annular groove is provided on the positioning block 32, and a limiting ring 31 is fixedly connected to the connecting shaft 28, and the limiting ring 31 is rotatably connected to the annular groove to improve the stability of the connecting shaft 28 when rotating. The mounting frame 22 is provided with a driving member for driving the mounting block 24 to slide, and the driving member includes a driving screw 25 rotatably connected to the mounting frame 22, the driving screw 25 is threadedly connected to the mounting block 24, and the two driving screws 25 are connected by a first synchronous member 26, and a servo motor 27 is installed on the cooling box 15, and the servo motor 27 is coaxially connected to one of the driving screws 25. Preferably, there are two groups of circulation units, which can cool the movable mold 2 and the mold core 3 inside the fixed mold 11 respectively to meet the working needs, and the two groups of circulation units are connected by a second synchronous member 35 to meet the working needs. During use, the servo motor 27 is started, and the servo motor 27 drives the driving screw 25 to rotate, which can then slide through the mounting block 24 and the connecting shaft 28. When the connecting shaft 28 slides inside the mounting frame 22, it can drive the gear on the connecting shaft 28 to slide, and the gear will engage with the rack 30 during the sliding stroke. At this moment, the connecting shaft 28 rotates under the engagement of the rack 30 when sliding, and then can drive the cooling fan 23 to rotate. The cooling fan 23 rotates to dissipate heat to the cooling fins 20, thereby dissipating heat to the cooling medium inside the water inlet pipe 16 and the water outlet pipe 17 to meet work needs.

[0040] In the embodiment provided by the present invention, a first stopper 33 is provided between the mounting block 24 and the mounting frame 22, and a second stopper 34 is provided between the positioning block 32 and the mounting frame 22. The first stopper 33 and the second stopper 34 have the same structure and working principle, and can further improve the stability of the mounting block 24 and the positioning block 32 when sliding.

[0041] In the embodiment provided by the present invention, a threaded core 14 is rotatably connected to the movable mold 2 through a rotating frame, and the mold core 3 is installed on the threaded core 14; a water collecting block 5 is installed inside the movable mold 2, and a water inlet pipe 16 and a water outlet pipe 17 are respectively connected to the water collecting block 5 through a conveying channel, and a cooling pipe 6 is installed on the threaded core 14, and the cooling pipe 6 is connected to the water collecting block 5; and a cross sealing ring 8 and an anisotropic sealing ring 9 are installed on the threaded core 14 to achieve a sealing effect.

[0042] In the embodiment provided by the present invention, the driving member includes a driving ring 10 installed inside the movable mold 2, a first gear 12 is provided on the driving ring 10, and a second gear 13 is installed on the threaded core 14, and the first gear 12 is meshed with the second gear 13; and a motor for driving the driving ring 10 to rotate is provided on the mold frame 1, thereby facilitating the rotation of the threaded core 14 and facilitating the unloading of the workpiece 4.

[0043] In the embodiment provided by the present invention, a wear-resistant sleeve 7 is further provided between the threaded core 14 and the movable mold 2, wherein the wear-resistant sleeve 7 is made of a customized set of materials.

[0044] It should be noted that the electrical equipment involved in this application can be powered by batteries or external power supply.

[0045] 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 indirectly connected 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.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water channel structure for a threaded core mold, comprising a mold frame (1) and a fixed mold (11) and a movable mold (2) mounted on the mold frame (1), characterized in that: A mold core (3) for injecting a workpiece (4) is disposed between the fixed mold (11) and the fixed mold (11), and a cooling element for cooling the mold core (3) is disposed on the mold frame (1); The cooling element comprises a cooling box (15) mounted on the mold frame (1), the cooling box (15) being provided with a circulation unit connected to the interior of the mold core (3), and a heat dissipation unit for cooling the circulation unit is also provided inside the cooling box (15); When in operation, the heat dissipation unit dissipates heat for the circulation unit, so that the temperature inside the circulation unit remains constant, which is used to dissipate heat for the mold core (3).

2. According to a water channel structure for a threaded core mold according to claim 1, the circulation unit includes a water inlet pipe (16) and a water outlet pipe (17) installed on a cooling box (15), and a circulation pump (21) is arranged inside the cooling box (15), the water inlet pipe (16) and the water outlet pipe (17) are respectively arranged on both sides of the circulation pump (21), and the sides of the water inlet pipe (16) and the water outlet pipe (17) away from the circulation pump (21) are respectively installed on the movable mold (2) through fasteners (19).

3. According to the water channel structure for a threaded core mold according to claim 2, the water inlet pipe (16) and the water outlet pipe (17) are located on one side inside the cooling box (15) and are also provided with heat dissipation fins (20).

4. According to the water channel structure for a threaded core mold as described in claim 3, the heat dissipation unit comprises a mounting frame (22) fixedly connected to the cooling box (15), a mounting block (24) is slidably connected to the mounting frame (22), and a heat dissipation fan (23) is installed on the mounting block (24) through a connecting shaft (28); A transmission member is also provided between the connecting shaft (28) and the mounting frame (22). When the mounting block (24) slides on the mounting frame (22), the transmission member drives the heat dissipation fan (23) to rotate to dissipate heat from the heat-conducting fins.

5. According to claim 4, a water channel structure for a threaded core mold, the transmission part includes a driving gear (29) installed on the connecting shaft (28), and a rack (30) is fixedly connected to the mounting frame (22), and the driving gear (29) is meshed with the rack (30); the mounting frame (22) is also slidably connected to a positioning block (32), an annular groove is provided on the positioning block (32), and a limiting ring (31) is fixedly connected to the connecting shaft (28), and the limiting ring (31) is rotatably connected in the annular groove to improve the stability of the connecting shaft (28) during rotation.

6. According to claim 5, a water channel structure for a threaded core mold is provided on the mounting frame (22) for driving the mounting block (24) to slide, and the driving member includes a driving screw (25) rotatably connected to the mounting frame (22), the driving screw (25) is threadedly connected to the mounting block (24), and the two driving screws (25) are transmission connected via a first synchronous member (26), and a servo motor (27) is installed on the cooling box (15), and the servo motor (27) is coaxially connected to one of the driving screws (25).

7. According to the water channel structure for a threaded core mold according to claim 4, a first limiting member (33) is provided between the mounting block (24) and the mounting frame (22), and a second limiting member (34) is provided between the positioning block (32) and the mounting frame (22).

8. According to the water channel structure for a threaded core mold as described in claim 2, the movable mold (2) is rotatably connected to a threaded core (14) via a rotating frame, and the mold core (3) is installed on the threaded core (14); A water collecting block (5) is installed inside the movable mold (2), the water inlet pipe (16) and the water outlet pipe (17) are respectively connected to the water collecting block (5) through a conveying channel, and a cooling pipe (6) is installed on the threaded core (14), and the cooling pipe (6) is connected to the water collecting block (5); A cross sealing ring (8) and an anisotropic sealing ring (9) are installed on the threaded core (14) to achieve a sealing effect.

9. According to a water channel structure for a threaded core mold as described in claim 8, the driving member includes a driving ring (10) installed inside the movable mold (2), a first gear (12) is provided on the driving ring (10), and a second gear (13) is installed on the threaded core (14), the first gear (12) is meshed with the second gear (13); and a motor for driving the driving ring (10) to rotate is provided on the mold frame (1).

10. According to the water channel structure for a threaded core mold as described in claim 8, a wear-resistant sleeve (7) is further provided between the threaded core (14) and the movable mold (2).

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