A double-lead internal and external thread injection mold

Abstract

The utility model relates to injection mold technical field, concretely relates to a kind of inner and outer double thread injection mold, including first mounting plate and second mounting plate, first mounting plate and second mounting plate between from left to right are sequentially installed with first module, second module, third module, fourth module and fifth module, there is first module, second module and third module between being provided with forming assembly, forming assembly includes first inner template, first mounting hole, first cooling pipe, second inner template, injection slot, second mounting hole, third mounting hole, second cooling pipe, fourth mounting hole, fifth mounting hole, third cooling pipe and injection mold core;The right side of product is cooled down using first cooling pipe and third cooling pipe cooperation, product side is cooled down using second cooling pipe simultaneously, effectively improve product cooling setting speed, effectively improve the hardness of product surface simultaneously, reduce product damage, improve blanking speed simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an internal and external double-threaded injection mold. Background Technology

[0002] Injection molds are tools used to produce plastic products; they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used to mass-produce certain complex-shaped parts. Specifically, it refers to injecting heated and molten plastic into the mold cavity under high pressure by an injection molding machine, and obtaining the molded product after cooling and solidification.

[0003] Among them, announcement number CN211994018U discloses a double-threaded core-pulling mold. An external motor drives a sprocket to rotate via a chain. The sprocket drives a rotating shaft to rotate. The rotating shaft meshes with a small gear to rotate. The small gear drives a connecting shaft to rotate. The connecting shaft drives a mandrel to rotate. The mandrel, in conjunction with the internal threaded hole on the moving mold insert, drives a push plate to rise. The push plate ejects the product outside the mandrel.

[0004] However, in actual use, since the product needs to cool and solidify before it can be demolded, the device mainly relies on natural cooling for solidification, which is slow and affects the production efficiency of the product. It can also easily cause damage to the threaded ends.

[0005] Therefore, it is necessary to invent a double-threaded injection mold to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide an internal and external double-threaded injection mold to solve the problem that the current technology mainly relies on natural cooling for shaping, which results in a slow cooling and shaping speed, thus affecting the production efficiency of the product and easily causing damage to the threaded ends.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an internal and external double-threaded injection mold, comprising a first mounting plate and a second mounting plate, wherein a first module, a second module, a third module, a fourth module and a fifth module are sequentially mounted between the first mounting plate and the second mounting plate from left to right, and a molding assembly is provided between the first module, the second module and the third module, the molding assembly comprising a first inner template, a first mounting hole, a first cooling pipe, a second inner template, an injection groove, a second mounting hole, a third mounting hole, a second cooling pipe, a fourth mounting hole, a fifth mounting hole, a third cooling pipe and an injection mold core.

[0008] By adopting the above technical solution, the first module is fixedly installed on the right side of the first mounting plate, the fifth module is fixedly installed on the left side of the second mounting plate, the fourth module is fixedly installed on the left side of the fifth module, the third module is fixedly installed on the left side of the fourth module, the second module is fixedly installed on the left side of the third module, and a hydraulic cylinder is installed on the right side of the second mounting plate, which drives the second module, the third module, the fourth module, the fifth module and the second mounting plate to slide left and right.

[0009] Optionally, a material inlet is provided in the middle of the first mounting plate, and a material guide groove is provided in the middle of the right side surface of the first module, wherein the material inlet and the middle of the material guide groove are connected.

[0010] By adopting the above technical solution, an extruder is installed on the left side of the first mounting plate, and the extruder injects liquid into the guide trough through the injection port.

[0011] Optionally, the first inner template is fixedly connected to the middle position of the left side surface of the second module, and the second inner template is slidably connected to the left side surface of the second module at both the front and rear sides of the first inner template. Multiple injection grooves are opened on the side surfaces of the two sets of second inner templates that are close to each other, and guide holes are opened between the positions of the two adjacent sets of injection grooves.

[0012] By adopting the above technical solution, the liquid inside the guide channel is introduced into the injection tank through the guide hole. The inner wall of the injection tank is provided with internal threads, so that the product surface forms external threads.

[0013] Optionally, the surface of the first inner template has multiple sets of insertion holes, the surface of the second module has a connection hole at the right end of the insertion hole, and the left side surface of the third module is rotatably connected to multiple sets of drive shafts. The left end of the drive shaft is fixedly connected to an injection mold core, and the drive shaft is rotatably connected to the insertion hole and the connection hole.

[0014] By adopting the above technical solution, the injection mold core is stuck inside the front and rear sets of injection grooves, and the surface of the injection mold core is provided with external threads, so that the inner wall of the product forms internal threads.

[0015] Optionally, the first inner template has two sets of vertical first mounting holes inside, and the first cooling pipe is fixedly installed inside the first mounting holes. The second module has two sets of horizontal fourth mounting holes and two sets of vertical fifth mounting holes inside, with the inner ends of the fourth and fifth mounting holes on the same side communicating with each other. The third cooling pipe is fixedly installed inside the fourth and fifth mounting holes. The lower end of the first cooling pipe and the front end of the third cooling pipe are fixedly connected, and a second connector is fixedly connected to the outer end of the third cooling pipe.

[0016] By adopting the above technical solution, the second connector is connected to the connector of the external cooling water pipe, and the right side of the product is cooled down through the cooperation of the first cooling pipe and the third cooling pipe.

[0017] Optionally, each of the two sets of the second inner templates is provided with a vertical second mounting hole and two sets of longitudinal third mounting holes. Both sets of the third mounting holes are connected to the second mounting holes. The second cooling pipe is fixedly installed inside the second mounting holes and the third mounting holes. One end of the outer side of the second cooling pipe is fixedly connected to a first connector.

[0018] By adopting the above technical solution, the first connector is connected to the connector of the external cooling water pipe, and the side of the product is cooled down through the second cooling pipe, thereby improving the product's shaping speed and hardness.

[0019] Optionally, the right side surface of the first module is fixedly connected with two sets of inclined transmission sliders, and the surfaces of the two sets of second inner templates are provided with inclined transmission grooves. The left side surface of the second module is provided with two sets of inclined limiting grooves, and the transmission sliders are slidably connected to the transmission grooves and limiting grooves.

[0020] By adopting the above technical solution, the second inner template slides back and forth on the left side surface of the second module, and the transmission slider slides left and right inside the transmission groove and the limiting groove.

[0021] Optionally, a hydraulic motor is fixedly installed on the upper end of the fifth module, a gear set is installed between the third, fourth and fifth modules, and the right end of the transmission shaft is fixedly connected to a gear in the gear set.

[0022] By adopting the above technical solution, the hydraulic motor drives the gear set to rotate via a chain, which in turn drives the transmission shaft to rotate, thereby rotating the injection mold core and demolding the product.

[0023] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. This utility model installs a first cooling pipe and a third cooling pipe inside the first inner template and the second module. The first cooling pipe and the third cooling pipe work together to cool and reduce the temperature of the right side of the product. At the same time, a second cooling pipe is installed inside both sets of second inner templates to cool the side of the product. This effectively improves the cooling and shaping speed of the product, increases the surface hardness of the product, reduces product damage, and increases the feeding speed. 2. In this utility model, the second inner template slides back and forth on the left side surface of the second module, the transmission slider slides left and right inside the transmission groove and the limiting groove, and the hydraulic cylinder pulls the second module to the right. Under the action of the inclined transmission slider, the two sets of second inner templates slide and separate in opposite directions, exposing the product to the outside, and further improving the feeding speed. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view structural diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the first module and the second module of this utility model; Figure 4 This is a schematic diagram of the structure of the second, third, fourth, and fifth modules of this utility model; Figure 5 This is a schematic diagram of the second inner template structure of this utility model; Figure 6 This is a schematic diagram of the first inner template and the second module structure of this utility model; Figure 7 This is a schematic diagram of the gear assembly structure of this utility model.

[0025] Explanation of reference numerals in the attached figures: 1. First mounting plate; 11. Injection port; 2. First module; 21. Guide groove; 22. Transmission slider; 3. Second module; 31. First inner template; 311. Insertion hole; 312. First mounting hole; 313. First cooling pipe; 32. Second inner template; 321. Transmission groove; 322. Injection tank; 323. Guide hole; 324. Second mounting hole; 325. Third mounting hole; 326. Second cooling pipe; 327. First connector; 33. Connection hole; 34. Fourth mounting hole; 35. Fifth mounting hole; 36. Third cooling pipe; 37. Second connector; 38. Limiting groove; 4. Third module; 41. Drive shaft; 42. Injection mold core; 43. Gear set; 5. Fourth module; 6. Fifth module; 61. Hydraulic motor; 7. Second mounting plate. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] This utility model provides, for example Figures 1 to 6The illustrated double-threaded injection mold includes a first mounting plate 1 and a second mounting plate 7. A first module 2, a second module 3, a third module 4, a fourth module 5, and a fifth module 6 are sequentially mounted between the first mounting plate 1 and the second mounting plate 7 from left to right. A molding assembly is disposed between the first module 2, the second module 3, and the third module 4. The molding assembly includes a first inner template 31, a first mounting hole 312, a first cooling pipe 313, a second inner template 32, an injection groove 322, a second mounting hole 324, a third mounting hole 325, a second cooling pipe 326, a fourth mounting hole 34, a fifth mounting hole 35, a third cooling pipe 36, and an injection mold core 42.

[0028] The second mounting plate 7 is fixedly connected to the left end of the piston rod in the hydraulic cylinder. During the extension and retraction of the piston rod, the second mounting plate 7, the second module 3, the third module 4, the fourth module 5 and the fifth module 6 slide left and right. The first mounting plate 1 is fixedly connected to the right end of the extruder. The extruder uses the first mounting plate 1 and the first module 2 to extrude the molten plastic liquid into the injection groove 322 between the first inner template 31 and the second inner template 32 to perform injection molding and shaping of the product. At the same time, the product can be quickly cooled and shaped through the first cooling pipe 313, the second cooling pipe 326 and the third cooling pipe 36.

[0029] See Figure 2 , Figure 3 and Figure 6 The first mounting plate 1 has an injection port 11 in the middle. The first module 2 has a guide groove 21 in the middle of the right side surface. The injection port 11 and the guide groove 21 are connected in the middle. The first inner template 31 is fixedly connected to the middle of the left side surface of the second module 3. The second inner template 32 is slidably connected to the left side surface of the second module 3 at the front and rear sides of the first inner template 31. Multiple injection grooves 322 are opened on the side surface of the two sets of second inner templates 32 that are close to each other. A guide hole 323 is opened between the two sets of injection grooves 322. Multiple insertion holes 311 are opened on the surface of the first inner template 31. A connection hole 33 is opened on the surface of the second module 3 at the right end of the insertion hole 311. Multiple drive shafts 41 are rotatably connected to the left side surface of the third module 4. An injection mold core 42 is fixedly connected to the left end of the drive shaft 41. The drive shaft 41 is rotatably connected to the insertion hole 311 and the connection hole 33.

[0030] Specifically, during the injection molding process, the first module 2, the second module 3, the first inner mold plate 31, and the second inner mold plate 32 are first closed. At this time, the injection grooves 322 on the front and rear sides are merged into a complete injection groove 322, and the injection mold core 42 is covered inside it. The extruder injects liquid into the interior of the injection groove 322 through the injection port 11, the guide groove 21, and the guide hole 323. The liquid fills the gap between the side wall of the injection groove 322 and the injection mold core 42, shaping the product.

[0031] See Figure 3 , Figure 5 and Figure 6 The first inner template 31 has two sets of vertical first mounting holes 312 inside. The first cooling pipe 313 is fixedly installed inside the first mounting holes 312. The second module 3 has two sets of horizontal fourth mounting holes 34 and two sets of vertical fifth mounting holes 35 inside. The inner ends of the fourth mounting holes 34 and the fifth mounting holes 35 on the same side are connected. The third cooling pipe 36 is fixedly installed inside the fourth mounting holes 34 and the fifth mounting holes 35. The lower end of the first cooling pipe 313 and the front end of the third cooling pipe 36 are fixedly connected. The outer end of the third cooling pipe 36 is fixedly connected to the second connector 37. The two sets of second inner templates 32 each have vertical second mounting holes 324 and two sets of vertical third mounting holes 325 inside. The two sets of third mounting holes 325 are connected to the second mounting holes 324. The second cooling pipe 326 is fixedly installed inside the second mounting holes 324 and the third mounting holes 325. The outer end of the second cooling pipe 326 is fixedly connected to the first connector 327.

[0032] In addition, after the liquid is completely injected into the injection tank 322, the coolant is delivered to the interior of the second cooling pipe 326 through the first connector 327 to cool the interior of the second inner mold 32, thereby cooling the side of the product. At the same time, the coolant is delivered to the interior of the third cooling pipe 36 and the first cooling pipe 313 through the second connector 37 to cool the interior of the first inner mold 31, thereby cooling the right side of the product. This allows the product to cool and solidify quickly, effectively improving the cooling and solidification speed of the product, and thus achieving rapid demolding and unloading.

[0033] See Figure 3 , Figure 4 and Figure 7 The right side surface of the first module 2 is fixedly connected with two sets of inclined transmission sliders 22. The surfaces of the two sets of second inner templates 32 are provided with inclined transmission grooves 321. The left side surface of the second module 3 is provided with two sets of inclined limiting grooves 38. The transmission sliders 22 are slidably connected to the transmission grooves 321 and the limiting grooves 38. The upper end of the fifth module 6 is fixedly installed with a hydraulic motor 61. A gear set 43 is installed between the third module 4, the fourth module 5 and the fifth module 6. The right end of the transmission shaft 41 is fixedly connected to the gear in the gear set 43.

[0034] It should be added that during the product demolding and unloading process, the hydraulic cylinder first pulls the second mounting plate 7, the second module 3, the third module 4, the fourth module 5, and the fifth module 6 to the right, separating the second module 3 from the first module 2. Since the transmission slider 22 is inclined, as the second module 3 continues to move to the right, the distance between the two sets of transmission sliders 22 gradually increases, thereby pushing the two sets of second inner templates 32 outward in sync, causing the two sets of second inner templates 32 to slide to both sides, opening the side of the product. At this time, the hydraulic motor 61 is started. The hydraulic motor 61 drives multiple sets of transmission shafts 41 to rotate through the gear set 43, thereby driving multiple sets of injection mold cores 42 to rotate, and thus unloading the product.

[0035] The working principle of this utility model is as follows: By installing a first cooling pipe 313 and a third cooling pipe 36 inside the first inner template 31 and the second module 3, the first cooling pipe 313 and the third cooling pipe 36 work together to cool the right side of the product. At the same time, a second cooling pipe 326 is installed inside both sets of second inner templates 32 to cool the side of the product, effectively improving the cooling and shaping speed of the product, while also effectively improving the surface hardness of the product, reducing product damage, and increasing the feeding speed. Simultaneously, by sliding the second inner template 32 back and forth on the left side surface of the second module 3, and the transmission slider 22 sliding left and right inside the transmission groove 321 and the limiting groove 38, the hydraulic cylinder pulls the second module 3 to the right. Under the action of the inclined transmission slider 22, the two sets of second inner templates 32 slide and separate in opposite directions, exposing the product to the outside, further improving the feeding speed.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A mold for injection molding a double-shouldered threaded tubular element, comprising a first mounting plate (1) and a second mounting plate (7), characterized in that: A first module (2), a second module (3), a third module (4), a fourth module (5), and a fifth module (6) are installed between the first mounting plate (1) and the second mounting plate (7) from left to right. A molding assembly is provided between the first module (2), the second module (3), and the third module (4). The molding assembly includes a first inner template (31), a first mounting hole (312), a first cooling pipe (313), a second inner template (32), an injection groove (322), a second mounting hole (324), a third mounting hole (325), a second cooling pipe (326), a fourth mounting hole (34), a fifth mounting hole (35), a third cooling pipe (36), and an injection mold core (42).

2. The mold according to claim 1, wherein: The first mounting plate (1) has a filling port (11) in the middle, and the first module (2) has a guide groove (21) in the middle of the right side surface. The filling port (11) and the guide groove (21) are connected in the middle.

3. The mold according to claim 1, wherein: The first inner template (31) is fixedly connected to the middle of the left side surface of the second module (3). The second inner template (32) is slidably connected to the left side surface of the second module (3) at both the front and rear sides of the first inner template (31). Multiple injection grooves (322) are opened on the side surface of the two sets of second inner templates (32) that are close to each other. A guide hole (323) is opened between the two adjacent sets of injection grooves (322).

4. The mold according to claim 1, wherein: The surface of the first inner template (31) has multiple sets of insertion holes (311), and the surface of the second module (3) has a connection hole (33) located at the right end of the insertion hole (311). The left side surface of the third module (4) is rotatably connected to multiple sets of drive shafts (41). The left end of the drive shaft (41) is fixedly connected to an injection mold core (42). The drive shaft (41) is rotatably connected to the insertion hole (311) and the connection hole (33).

5. The mold according to claim 1, wherein: The first inner template (31) has two sets of vertical first mounting holes (312) inside. The first cooling pipe (313) is fixedly installed inside the first mounting hole (312). The second module (3) has two sets of horizontal fourth mounting holes (34) and two sets of vertical fifth mounting holes (35) inside. The inner ends of the fourth mounting hole (34) and the fifth mounting hole (35) on the same side are connected. The third cooling pipe (36) is fixedly installed inside the fourth mounting hole (34) and the fifth mounting hole (35). The lower end of the first cooling pipe (313) and the front end of the third cooling pipe (36) are fixedly connected. The outer end of the third cooling pipe (36) is fixedly connected to a second connector (37).

6. The mold according to claim 1, wherein: The interior of each of the two sets of second inner templates (32) is provided with a vertical second mounting hole (324) and two sets of longitudinal third mounting holes (325). The two sets of third mounting holes (325) are connected to the second mounting holes (324). The second cooling pipe (326) is fixedly installed inside the second mounting holes (324) and the third mounting holes (325). The outer end of the second cooling pipe (326) is fixedly connected to a first connector (327).

7. The mold according to claim 1, wherein: The right side surface of the first module (2) is fixedly connected with two sets of inclined transmission sliders (22), and the surfaces of the two sets of second inner templates (32) are provided with inclined transmission grooves (321). The left side surface of the second module (3) is provided with two sets of inclined limiting grooves (38), and the transmission sliders (22) are slidably connected with the transmission grooves (321) and the limiting grooves (38).

8. The mold according to claim 4, wherein: A hydraulic motor (61) is fixedly installed on the upper end of the fifth module (6), and a gear set (43) is installed between the third module (4), the fourth module (5) and the fifth module (6). The right end of the transmission shaft (41) is fixedly connected to the gear in the gear set (43).

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