Thread demolding mechanism

Abstract

The utility model discloses a thread demoulding mechanism, which is used for demoulding a thread product in a mould and comprises a gear module, a rack module and a screw transmission module, the gear module is fixed on a rear mold plate of the mold, the rack module is fixed on a front mold plate of the mold, and the gear module is meshed with the rack module; the screw transmission module is connected with a screw arranged in the threaded product and is meshed with the gear module; the mold is opened, the front mold plate and the rear mold plate are separated, the rack module is driven to move, and therefore the gear module is driven to rotate, and the gear module rotates to drive the screw transmission module and the screw to do rotary linear motion. According to the thread demolding mechanism, the mold is easy to manufacture, the cost is low, the mold opening time is short, the production cycle of product injection molding is shortened, the mold manufacturing cost is reduced, and the efficiency and profit of product injection molding production are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screw demoulding, and particularly relates to a screw demoulding mechanism. Background Art

[0002] In the prior art, for products with screw structures formed by injection molding, currently, an oil pressure motor is used to drive the rotation of a screw rod with screw teeth for demoulding. This method has high mold manufacturing costs, long mold opening time, long injection molding cycle for product production, and low production efficiency. Summary of the Invention

[0003] According to an embodiment of the utility model, a screw demoulding mechanism is provided for demoulding screw products in a mold, including: a gear module, a rack module, and a screw rod transmission module;

[0004] The gear module is fixed on the rear template of the mold, the rack module is fixed on the front template of the mold, and the gear module meshes with the rack module;

[0005] The screw rod transmission module is connected to a screw rod placed in the screw product and meshes with the gear module;

[0006] When the mold is opened, the front template and the rear template are separated, driving the movement of the rack module, thereby driving the rotation of the gear module. The rotation of the gear module drives the screw rod transmission module and the screw rod to perform a rotational linear motion.

[0007] Further, the rack module includes: a rack fixing block and a rack;

[0008] The rack fixing block is fixed on the front template;

[0009] The rack is fixed on the rack fixing block and meshes with the gear module. The movement of the rack drives the rotation of the gear module.

[0010] Further, the screw rod transmission module includes: a connecting piece, a spline shaft, a pair of bearings, a transmission gear, a bushing, and an installation component;

[0011] The installation component is fixed on the rear template. The installation component is used to install the gear module, a pair of bearings, and the transmission gear. The rack module penetrates through the installation component;

[0012] The connecting piece connects one end of the screw rod and the spline shaft. The spline shaft penetrates through the installation component;

[0013] The bushing is sleeved on the spline shaft. The transmission gear is fixed on the bushing. A pair of bearings are sleeved on the bushing and are located on both sides of the transmission gear. The pair of bearings are installed in the installation component;

[0014] The transmission gear meshes with the gear module;

[0015] The driving gear rotates, driving the bushing to rotate, thereby driving the spline shaft to rotate while performing axial movement.

[0016] Furthermore, the installation assembly includes: a first mounting plate, a second mounting plate, and a third mounting plate;

[0017] The first mounting plate is fixed on the rear template, and the first mounting plate, the second mounting plate, and the third mounting plate are fixedly connected in sequence;

[0018] The gear module is mounted on the first mounting plate, the second mounting plate, and the third mounting plate;

[0019] A pair of bearings are respectively arranged on the first mounting plate and the second mounting plate;

[0020] The driving gear is arranged on the second mounting plate, and the rack module penetrates through the second mounting plate.

[0021] Furthermore, the screw drive module further includes: a limit ring and an auxiliary spring;

[0022] The limit ring is fixed at the other end of the spline shaft, and the limit ring limits the moving distance of the spline shaft;

[0023] The auxiliary spring is sleeved on the spline shaft and is arranged between the installation assembly and the limit ring, and the auxiliary spring assists the spline shaft to move backward.

[0024] Furthermore, the gear module includes: a gear set and a mounting shaft;

[0025] The mounting shaft is fixed within the installation assembly;

[0026] The gear set is mounted on the mounting shaft, and the gear set meshes with the rack module and the driving gear respectively to drive the driving gear to rotate.

[0027] Furthermore, the gear set includes: a main gear and a slave gear;

[0028] Both the main gear and the slave gear are sleeved and fixed on the mounting shaft;

[0029] The main gear meshes with the rack module, and the slave gear meshes with the driving gear;

[0030] The main gear rotates, driving the mounting shaft and the slave gear to rotate.

[0031] Furthermore, the number of the gear sets is three, and each group of gear sets meshes with each other in sequence, and two of the gear sets mesh with the rack module and the driving gear respectively.

[0032] According to the thread demolding mechanism of the embodiment of the present utility model, the mold is simple to manufacture, has a low cost, a short mold opening time, shortens the production cycle of product injection molding, reduces the mold manufacturing cost, and improves the efficiency and profit of product injection molding production.

[0033] It is to be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the claimed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 FIG. is a structural diagram of a threaded product according to an embodiment of the present invention;

[0035] Figure 2 FIG. is a cross-sectional view of a threaded product according to an embodiment of the present invention;

[0036] Figure 3 FIG. is a structural diagram of a threaded demolding mechanism according to an embodiment of the present invention;

[0037] Figure 4 FIG. is a structural diagram of a gear module of a threaded demolding mechanism according to an embodiment of the present invention;

[0038] Figure 5 FIG. is a front view of a gear module of a threaded demolding mechanism according to an embodiment of the present invention;

[0039] Figure 6 FIG. is an assembled cross-sectional view of a threaded demolding mechanism according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and the present invention will be further elaborated.

[0041] First, in combination with Figures 1 to 6 A threaded demolding mechanism according to an embodiment of the present invention will be described, which is used for demolding threaded products in a mold and has a wide range of application scenarios.

[0042] As Figures 1 to 6 shown, the threaded demolding mechanism according to an embodiment of the present invention, which is used for demolding the threaded product 1 in a mold, includes: a gear module, a rack module, and a screw drive module.

[0043] Specifically, as Figures 1 to 6As shown, in this embodiment, the gear module is fixed on the rear template 7 of the mold, the rack module is fixed on the front template 8 of the mold, and the gear module meshes with the rack module; the screw drive module is connected to the screw 2 placed in the threaded product 1 and meshes with the gear module; when the mold is opened, the front template 8 and the rear template 7 are separated, driving the movement of the rack module, thereby driving the rotation of the gear module. The rotation of the gear module drives the screw drive module and the screw 2 to perform a rotational linear motion. Without an additional drive mechanism, through the meshing transmission of the gear and the rack, the mold opening motion is converted into the rotational motion of the screw 2, reducing costs; during the mold opening process, the rack module drives the rotation of the gear module, and the gear module further drives the screw drive module and the screw 2 to perform a rotational linear motion, thereby realizing the efficient demolding of the threaded product 1 and reducing the demolding time; this mechanism adopts a mechanical transmission method of gears and racks, without the need to use expensive equipment such as hydraulic motors, thereby reducing the manufacturing and maintenance costs.

[0044] Specifically, as Figures 1 to 6 shown, in this embodiment, the rack module includes: a rack fixing block 31 and a rack 32; the rack fixing block 31 is fixed on the front template 8; the rack 32 is fixed on the rack fixing block 31 and meshes with the gear module. When the rack 32 moves, it drives the rotation of the gear module, and the structure is simple and stable.

[0045] Specifically, as Figures 1 to 6 shown, in this embodiment, the screw drive module includes: a connecting piece 41, a spline shaft 42, a pair of bearings 43, a transmission gear 44, a bushing 45 and a mounting assembly; the mounting assembly is fixed on the rear template 7. The mounting assembly is used to mount the gear module, a pair of bearings 43 and the transmission gear 44, and the rack 32 module passes through the mounting assembly; the connecting piece 41 connects one end of the screw 2 and the spline shaft 42, and the spline shaft 42 passes through the mounting assembly; the bushing 45 is sleeved on the spline shaft 42, the transmission gear 44 is fixed on the bushing 45, a pair of bearings 43 are sleeved on the bushing 45 and are located on both sides of the transmission gear 44, and a pair of bearings 43 are installed in the mounting assembly; the transmission gear 44 meshes with the gear module; when the transmission gear 44 rotates, it drives the bushing 45 to rotate in place, thereby driving the spline shaft 42 to rotate while performing an axial movement to realize the separation of the screw 2 from the threaded product 1. In this embodiment, by fixing a pair of bearings 43, the transmission gear 44 and the gear module on the rear template 7 through the mounting assembly, the transmission system can be effectively stabilized; the meshing method between the transmission gear 44 and the gear module can achieve high-precision transmission, ensuring the accurate rotation and axial movement of the spline shaft 42, thereby improving the demolding accuracy of the threaded product 1.

[0046] Further, as Figures 1 to 6As shown in the figure, in this embodiment, the installation component includes: a first mounting plate 46, a second mounting plate 47, and a third mounting plate 48; the first mounting plate 46 is fixed on the rear template 7, and the first mounting plate 46, the second mounting plate 47, and the third mounting plate 48 are fixedly connected in sequence; the gear module is mounted on the first mounting plate 46, the second mounting plate 47, and the third mounting plate 48; a pair of bearings 43 are respectively arranged on the first mounting plate 46 and the second mounting plate 47; the transmission gear 44 is arranged on the second mounting plate 47, and the rack 32 module penetrates through the second mounting plate 47. By using the first mounting plate 46, the second mounting plate 47, and the third mounting plate 48, each part of the transmission system is separately installed, making the system easier to assemble and maintain, capable of quickly adjusting and replacing components; achieving protection for each component and reducing interference between components.

[0047] Further, as Figures 1 to 6 shown, in this embodiment, the screw drive module further includes: a limit ring 421 and an auxiliary spring 49; the limit ring 421 is fixed at the other end of the spline shaft 42, and the limit ring 421 limits the moving distance of the spline shaft 42 to prevent mechanical failures or damages caused by excessive movement of the spline shaft 42; the auxiliary spring 49 is sleeved on the spline shaft 42 and is arranged between the installation component and the limit ring 421, and the auxiliary spring 49 assists the spline shaft 42 to move backward. Since the auxiliary spring 49 is in a compressed state before mold opening, when the mold is opened, the spline shaft 42 moves backward, and the elastic force of the auxiliary spring 49 is released, pushing the spline shaft 42 to move backward.

[0048] Further, as Figures 1 to 6 shown, in this embodiment, the gear module includes: a gear set 5 and a mounting shaft 6; the mounting shaft 6 is fixed in the installation component; the gear set 5 is mounted on the mounting shaft 6, and the gear set 5 meshes with the rack 32 module and the transmission gear 44 respectively to drive the transmission gear 44 to rotate. Through the gear set 5, the transmission ratio can be adjusted at different levels, thereby achieving higher transmission accuracy and torque conversion, enhancing the flexibility of the transmission system, and making the transmission more stable. In this embodiment, the number of the gear sets 5 is three groups, and each group of gear sets 5 meshes with each other in sequence. Two of the gear sets 5 mesh with the rack 32 module and the transmission gear 44 respectively. The three groups of gear sets 5 can achieve more flexible adjustment of the transmission ratio, optimize the torque and speed conversion through step-by-step transmission; the step-by-step meshing of the three groups of gear sets 5 can effectively reduce the transmission error and improve the transmission accuracy of the system; the load can be distributed to multiple gears, reducing the burden on each gear set 5, thereby reducing wear and improving the reliability of the system.

[0049] Further, as Figures 1 to 6As shown, in this embodiment, the gear set 5 includes a main gear 51 and a driven gear 52. Both the main gear 51 and the driven gear 52 are sleeved and fixed on the mounting shaft 6. The main gear 51 meshes with the rack 32 module to convert the linear motion of the rack 32 into the rotational motion of the main gear 51. The driven gear 52 meshes with the transmission gear 44. When the main gear 51 rotates, it drives the mounting shaft 6 and the driven gear 52 to rotate.

[0050] During mold opening: The external injection molding machine performs the mold opening action. The front template 8 and the rear template 7 are gradually separated. The front template 8 drives the rack fixing block 31 and the rack 32 to start moving. The rack 32 drives the main gear 51 to rotate through tooth meshing, thereby driving the driven gear 52 to rotate, and sequentially driving each gear set 5 to rotate until the transmission gear 44 is driven to rotate. The rotation of the transmission gear 44 drives the bushing 45 to rotate, thereby driving the spline shaft 42 to rotate and axially retreat, realizing the start of demolding of the threaded product 1. When the rear template 7 moves to the set distance, the rack 32 also moves to the set relative position, and the threaded structure on the threaded product 1 is completely demolded. The threaded product 1 is ejected, and the picking is performed to complete the mold opening action.

[0051] During mold closing: The external injection molding machine performs the mold closing action. The rear template 7 performs the mold closing action under the mold closing thrust of the injection molding machine. The rack 32 starts to perform the reset movement and drives multiple gear sets 5 to reset, thereby driving the transmission gear 44, the spline shaft 42, and the screw 2 to perform the reset movement. When the rear template 7 is closed to the designed position, the rack 32, the gear set 5, and the transmission gear 44 all rotate to the reset position to complete the mold closing action.

[0052] As above, with reference to Figures 1 to 6 The threaded demolding mechanism according to the embodiment of the present invention is described. The mold is simple to manufacture, has a low cost, a short mold opening time, shortens the production cycle of product injection molding, reduces the mold manufacturing cost, and improves the efficiency and profit of product injection molding production.

[0053] It should be noted that in this specification, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "comprising..." do not exclude the presence of additional identical elements in the process, method, article or device including the elements.

[0054] Although the content of the present utility model has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be construed as a limitation of the present utility model. After those skilled in the art have read the above content, various modifications and substitutions to the present utility model will be obvious. Therefore, the protection scope of the present utility model should be defined by the appended claims.

Claims

1. A thread demolding mechanism for demolding threaded products in a mold, characterized in that, It includes: a gear module, a rack module, and a screw drive module; The gear module is fixed on the rear template of the mold, the rack module is fixed on the front template of the mold, and the gear module meshes with the rack module; The screw drive module is connected to a screw placed in the threaded product and meshes with the gear module; When the mold is opened, separating the front template and the rear template, driving the movement of the rack module, thereby driving the rotation of the gear module, and the rotation of the gear module drives the screw drive module and the screw to perform a rotational linear motion.

2. The threaded demolding mechanism according to claim 1, wherein, The rack module includes: a rack fixing block and a rack; The rack fixing block is fixed on the front template; The rack is fixed on the rack fixing block and meshes with the gear module, and the movement of the rack drives the rotation of the gear module.

3. The screw thread demolding mechanism according to claim 1, wherein, The screw drive module includes: a connecting piece, a spline shaft, a pair of bearings, a transmission gear, a bushing, and a mounting assembly; The mounting assembly is fixed on the rear template, and the mounting assembly is used to mount the gear module, the pair of bearings, and the transmission gear, and the rack module passes through the mounting assembly; The connecting piece connects one end of the screw and the spline shaft, and the spline shaft passes through the mounting assembly; The bushing is sleeved on the spline shaft, the transmission gear is fixed on the bushing, the pair of bearings are sleeved on the bushing and are located on both sides of the transmission gear, and the pair of bearings are installed in the mounting assembly; The transmission gear meshes with the gear module; When the transmission gear rotates, it drives the rotation of the bushing, thereby driving the rotation of the spline shaft while performing an axial movement.

4. The threaded demolding mechanism according to claim 3, wherein, The mounting assembly includes: a first mounting plate, a second mounting plate, and a third mounting plate; The first mounting plate is fixed on the rear template, and the first mounting plate, the second mounting plate, and the third mounting plate are fixedly connected in sequence; The gear module is mounted on the first mounting plate, the second mounting plate, and the third mounting plate; The pair of bearings are respectively arranged on the first mounting plate and the second mounting plate; The transmission gear is arranged on the second mounting plate, and the rack module passes through the second mounting plate.

5. The thread demolding mechanism according to claim 3 or 4, characterized in that The screw drive module further includes: a limit ring and an auxiliary spring; The limit ring is fixed at the other end of the spline shaft, and the limit ring limits the moving distance of the spline shaft; The auxiliary spring is sleeved on the spline shaft and is arranged between the mounting assembly and the limit ring, and the auxiliary spring assists the spline shaft to move backward.

6. The screw thread demolding mechanism according to claim 3, characterized in that, The gear module includes: a gear set and a mounting shaft; The mounting shaft is fixed in the mounting assembly; The gear set is mounted on the mounting shaft, and the gear set meshes with the rack module and the transmission gear respectively to drive the rotation of the transmission gear.

7. The thread demolding mechanism according to claim 6, wherein The gear set includes: a main gear and a slave gear; Both the main gear and the slave gear are sleeved and fixed on the mounting shaft; The main gear meshes with the rack module, and the slave gear meshes with the transmission gear; When the main gear rotates, it drives the rotation of the mounting shaft and the slave gear.

8. The thread demolding mechanism according to claim 6, wherein The number of the gear sets is three, and each of the gear sets meshes with each other in sequence, wherein two of the gear sets mesh with the rack module and the transmission gear respectively.

Images