Auxiliary screw withdrawing device for plastic tooth mixing mold

Abstract

The utility model discloses a kind of plastic toothed die auxiliary screw withdrawal devices, including toothed die rod, toothed thread and engaging assembly are provided in toothed die rod, and driving device is connected by engaging assembly;Work panel, work panel is provided with the screw slot of toothed die rod, the placement groove of corresponding toothed thread is provided in screw slot, ejector pin device is penetrated in the bottom of placement groove;Auxiliary device, including the push rack of push work panel and the transmission assembly of connection driving device, driving device is connected push rack through transmission assembly;When driving device drives toothed die rod to rotate screw withdrawal, driving device is synchronously driven push rack push work panel through transmission assembly, to make placement groove away from toothed thread with toothed die rod screw withdrawal synchronously;The utility model realizes that toothed die rod rotates screw withdrawal and work panel drives workpiece synchronous movement, avoid the relative jam between workpiece and toothed thread, greatly improve screw withdrawal efficiency and stability, reduce workpiece loss.

Description

Technical Field

[0001] This utility model relates to the field of plastic product injection molding technology, and in particular to an auxiliary screw unwinding device for plastic auger molds. Background Technology

[0002] In the field of plastic injection molding, especially in the production of products involving internal thread structures, the efficiency and stability of the unscrew process directly affect overall production efficiency. In traditional mold design, the demolding of internal threads often relies on manual operation or simple mechanical structures, leading to low production efficiency, increased product defect rates, and severe wear and tear on mold components. With the development of industrial automation and precision manufacturing, how to achieve efficient, stable, and low-wear automated unscrew removal has become a key technical challenge that the industry urgently needs to solve.

[0003] In existing technologies, some solutions use hydraulic motors or servo motors to drive the rotation of the threaded core to achieve unscrewing, but significant drawbacks remain. For example, in the self-rotating demolding device for internal threads on the fixed mold side disclosed in patent CN110202760A, a motor sprocket and chain drive the rotation of the threaded core. Although this achieves automated demolding, the complex mechanical structure involves multiple transmission components, such as sprockets, chains, and gear sets. This results in a long energy transmission path, high losses, and susceptibility to mechanical wear, leading to decreased stability after long-term operation. Furthermore, this solution requires multiple mold openings, further increasing the production cycle and the risk of mold wear.

[0004] Similar problems are particularly prominent in the field of plastic bottle cap molds. For example, the thread-removing demolding structure described in patent CN212405961A relies on the cooperation of the demolding hydraulic column and the demolding ejector pin. Although the cooling is accelerated by the condenser to reduce demolding damage, the pressure fluctuation of the hydraulic system and the error of the ejector pin stroke may still cause thread damage or demolding failure, which cannot meet the dual requirements of high efficiency and low loss.

[0005] To address the aforementioned issues, a novel auxiliary screw-removal device for plastic threaded molds is proposed. This device achieves precise linkage between the screw-removal action and the mold opening and closing, significantly shortening the production cycle. Simultaneously, it reduces energy transmission links and component friction, improving system stability and extending mold life, providing reliable technical support for the efficient and stable production of plastic internal thread molds. Utility Model Content

[0006] The present invention aims to solve the problem of how to achieve efficient, stable and low-loss automatic screw unwinding in the aforementioned prior art.

[0007] To solve the above-mentioned technical problems, this utility model provides an auxiliary screw unwinding device for plastic auger molds, including an auger mold rod, an auger thread provided at the upper end of the auger mold rod, an engagement component provided at the lower end of the auger mold rod, and a drive device connected through the engagement component;

[0008] The working panel is provided with a screw unscrew slot through which the screw-stirring die rod can pass. The screw unscrew slot is provided with a placement slot corresponding to the screw-stirring thread, and a pin device is inserted at the bottom of the placement slot.

[0009] The auxiliary device includes a push rack that pushes against the working panel and a transmission assembly that connects to the drive unit, wherein the drive unit is connected to the push rack through the transmission assembly;

[0010] When the drive unit drives the spiral die rod to rotate and unscrew, the drive unit synchronously drives the push rack to push the working panel through the transmission component, so that the placement groove moves away from the spiral thread synchronously with the spiral die rod unscrewing.

[0011] Preferably, the driving device includes a drive motor and a drive gear connected to the drive motor. The transmission assembly includes a push gear that meshes with the push rack. A transmission worm wheel is tightly attached to one side of the push gear. The transmission worm wheel is meshed with a transmission worm. A transmission gear is fixedly installed at the lower end of the transmission worm. The transmission gear is meshed with the drive gear. The driving device drives the push rack to push the product away from the auger rod through the drive gear, transmission worm, transmission worm wheel, push gear, and push rack.

[0012] Preferably, an elastic fastening assembly is provided between the push gear and the transmission worm gear. The elastic fastening assembly includes a fastening bolt passing through the rotating shaft of the push gear and the transmission worm gear. A fastening nut is provided at one end of the fastening bolt. An abutment washer and a fastening spring are sleeved on the fastening bolt. One end of the fastening spring abuts against the abutment washer, and the other end abuts against the push gear and makes the push gear fit tightly against the transmission worm gear. The transmission worm gear abuts against the fastening nut.

[0013] A positioning protrusion is provided at one end of the push gear near the transmission worm gear, and a positioning groove corresponding to the positioning protrusion is provided on the transmission worm gear.

[0014] Preferably, the meshing assembly includes a rotating gear fixedly disposed at the lower end of the helical mold rod and a driven gear meshing with the rotating gear, the driven gear meshing with the drive gear; the drive device drives the helical mold rod to rotate and unscrew through the drive gear, the driven gear and the rotating gear.

[0015] Preferably, the drive motor is provided with a power gear, and a connecting gear is fixedly provided at the lower end of the drive gear. A transmission belt is sleeved between the power gear and the connecting gear, and the drive motor is connected to the drive gear through the power gear, the connecting gear and the transmission belt.

[0016] Preferably, the system also includes a main frame plate, on which a first positioning post is fixedly provided, and on which a first positioning hole corresponding to the first positioning post is provided on the working panel. The working panel slides relative to the main frame plate through the first positioning post and the first positioning hole.

[0017] The main frame plate has a recessed arrangement groove, and an inner arrangement plate is installed on the arrangement groove.

[0018] Preferably, a first limiting block is fixedly provided on the inner arrangement plate, and the first limiting block is provided with a first limiting groove that limits the sliding direction of the push rack.

[0019] The fastening bolt is fixed with a second limiting block, and the fastening bolt is fixed with a third limiting block;

[0020] A fourth limiting block is fixedly installed on the inner arrangement plate. The fourth limiting block is provided with a second limiting groove for positioning the transmission worm wheel. A first positioning ring is provided on the transmission worm wheel. A worm wheel through hole corresponding to the transmission worm wheel is provided on the inner arrangement plate. A second positioning ring corresponding to the first positioning ring is provided in the worm wheel through hole.

[0021] A key is provided between the transmission worm gear and the transmission gear to form a fixed connection.

[0022] Preferably, the inner arrangement plate is provided with a first inner groove corresponding to the first limiting block, a second inner groove corresponding to the second limiting block, and a third inner groove corresponding to the third limiting block.

[0023] A first fixing hole is provided on the first limiting block, and a second fixing hole corresponding to the first fixing hole is provided on the first inner groove. The first limiting block and the inner arrangement plate are fixedly connected by first fixing members passing through the first fixing hole and the second fixing hole.

[0024] A third fixing hole is provided on the second limiting block, and a fourth fixing hole corresponding to the third fixing hole is provided on the second inner groove. The second limiting block and the inner arrangement plate are fixedly connected by second fixing members passing through the third fixing hole and the fourth fixing hole.

[0025] A fifth fixing hole is provided on the third limiting block, and a sixth fixing hole corresponding to the fifth fixing hole is provided on the third inner groove. The third limiting block and the inner arrangement plate are fixedly connected by a third fixing member passing through the fifth fixing hole and the sixth fixing hole.

[0026] A seventh fixing hole is provided on the fourth limiting block, and an eighth fixing hole corresponding to the seventh fixing hole is provided on the inner arrangement plate. The fourth limiting block and the inner arrangement plate are fixedly connected by a fourth fixing member passing through the seventh fixing hole and the eighth fixing hole.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] In this invention, the thread-unscrew rod is connected to the drive device via a meshing assembly. The working panel is equipped with a screw-removing slot and an ejector pin device. The push rack of the auxiliary device is driven by the drive device through a transmission assembly, so that the placement slot moves away synchronously with the screw-removing of the thread-unscrew rod. This achieves synchronous movement of the screw-unscrew rod and the workpiece driven by the working panel, avoiding relative jamming between the workpiece and the thread-unscrew, greatly improving the screw-removing efficiency and stability, and reducing workpiece wear.

[0029] The elastic fastening assembly uses fastening bolts, nuts, abutment washers, and fastening springs to achieve elastic fastening. The positioning protrusion of the push gear engages with the positioning groove of the transmission worm gear. Utilizing the characteristics of the elastic fastening assembly, when the push rack is pressed back during mold closing, causing the push gear to reverse, the push gear will not drive the transmission worm gear to reverse. The elastic fastening assembly eliminates transmission backlash, ensuring a tight fit between the push gear and the transmission worm gear, improving transmission accuracy. The positioning protrusion and positioning groove ensure precise assembly, reducing transmission failures caused by assembly errors. More importantly, during mold closing, there is no need for the drive device to reverse; the push rack can be returned to its position directly through the mold closing action, significantly saving operation time, improving equipment efficiency, and avoiding the wear and tear caused by frequent forward and reverse rotation of the drive device.

[0030] Machine mold closing refers to the process in which the moving mold and the fixed mold of the mold approach each other and close after the screw is unscrewed. During this process, the moving mold will exert pressure on the working panel, which will directly push the push rack to move to the initial position. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0032] In the attached image:

[0033] Figure 1 Schematic diagram of an auxiliary screw-removing device for plastic auger molds Figure 1 ;

[0034] Figure 2 Schematic diagram of an auxiliary screw-removing device for plastic auger molds Figure 2 ;

[0035] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0036] Figure 4 A partial schematic diagram of the auxiliary screw-removing device for plastic auger molds. Figure 1 ;

[0037] Figure 5A partial schematic diagram of the auxiliary screw-removing device for plastic auger molds. Figure 2 ;

[0038] Figure 6 A partial schematic diagram of the auxiliary screw-removing device for plastic auger molds. Figure 3 ;

[0039] Figure 7 A schematic diagram of the driving mechanism and the hobbing rod;

[0040] Figure 8 This is a schematic diagram of the auxiliary device;

[0041] Figure 9 Explosion of auxiliary device Figure 1 ;

[0042] Figure 10 Explosion of auxiliary device Figure 2 ;

[0043] Figure 11 A cross-sectional schematic diagram of an auxiliary screw-removing device for a plastic mandrel mold;

[0044] Figure 12 Exploded view of auxiliary devices and internal layout panels;

[0045] Figure 13 This is a schematic diagram of the ejector pin device. Detailed Implementation

[0046] The technical solution of this utility model will now be described with reference to the accompanying drawings. However, the described embodiments are only a part of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0047] like Figures 1 to 13 As shown, this utility model provides an auxiliary screw unwinding device for a plastic auger mold, including an auger mold rod 1000, an auger thread 1001 provided at the upper end of the auger mold rod 1000, an engagement component 1100 provided at the lower end of the auger mold rod 1000, and a drive device 4000 connected through the engagement component 1100.

[0048] The working panel 2000 is provided with a screw-removing slot 2001 through which the screw-removing mold rod 1000 can pass. The screw-removing slot 2001 is provided with a placement slot 2002 corresponding to the screw-removing thread 1001. A ejector pin device 5000 is inserted at the bottom of the placement slot 2002.

[0049] The auxiliary device 3000 includes a push rack 3001 that pushes against the working panel 2000 and a transmission assembly 3100 that connects to the drive device 4000. The drive device 4000 is connected to the push rack 3001 through the transmission assembly 3100.

[0050] When the drive device 4000 drives the spiral die rod 1000 to rotate and unscrew, the drive device 4000 synchronously drives the push rack 3001 to push the working panel 2000 through the transmission component 3100, so that the placement groove 2002 moves away from the spiral thread 1001 synchronously with the spiral die rod 1000 as it unscrews.

[0051] like Figures 1 to 7 As shown, in this embodiment, the driving device 4000 includes a driving motor 4100 and a driving gear 4200 connected to the driving motor 4100. The transmission assembly 3100 includes a pushing gear 3101 that meshes with a pushing rack 3001. A transmission worm gear 3103 is tightly attached to one side of the pushing gear 3101. The transmission worm gear 3103 is meshed with a transmission worm 3105. A transmission gear 3106 is fixedly provided at the lower end of the transmission worm 3105. The transmission gear 3106 is meshed with the driving gear 4200. The driving device 4000 drives the pushing rack 3001 to push the product away from the stirring mold rod 1000 through the driving gear 4200, the transmission worm 3105, the transmission worm gear 3103, the pushing gear 3101, and the pushing rack 3001.

[0052] An elastic fastening assembly 3200 is provided between the push gear 3101 and the transmission worm gear 3103. The elastic fastening assembly includes a fastening bolt 3201 passing through the rotation shaft of the push gear 3101 and the transmission worm gear 3103. A fastening nut 3202 is provided at one end of the fastening bolt 3201. An abutment washer 3203 and a fastening spring 3204 are sleeved on the fastening bolt 3201. One end of the fastening spring 3204 abuts against the abutment washer 3203, and the other end abuts against the push gear 3101, making the push gear 3101 tightly fit against the transmission worm gear 3103. The transmission worm gear 3103 abuts against the fastening nut 3202.

[0053] A positioning protrusion 3102 is provided at one end of the push gear 3101 near the transmission worm gear 3103, and a positioning groove 3104 corresponding to the positioning protrusion 3102 is provided on the transmission worm gear.

[0054] Specifically, the push rack 3001 is in direct contact with the working panel 2000, driving the working panel 2000 to move through the pushing action. The push rack 3001 is meshed with the push gear 3101, which is tightly engaged with the transmission worm gear 3103 through the elastic fastening component 3200. The transmission worm gear 3103 is meshed with the transmission worm 3105, which is meshed with the drive gear 4200 through the transmission gear 3106, thereby transmitting the power of the drive device 4000 to the push rack 3001.

[0055] The push rack 3001 is located below the working panel 2000 and contacts the edge of the working panel 2000. The push gear 3101, transmission worm gear 3103, transmission worm 3105, and transmission gear 3106, and other transmission components 3100, are connected sequentially, forming a transmission chain through meshing, and are located on the side of the entire device. The elastic fastening component 3200 passes through the rotating shafts of the push gear 3101 and the transmission worm gear 3103, serving to fix and elastically fasten them.

[0056] The main function of the auxiliary device 3000 is to transmit the power of the drive device 4000 to the work panel 2000, which in turn drives the plastic product to move synchronously away from the spiral thread 1001 of the spiral die rod 1000. The elastic fastening component 3200 achieves elastic fastening between the push gear 3101 and the transmission worm gear 3103. Utilizing its characteristics, when the machine closes the mold, the push rack 3001 is pressed back, causing the push gear 3101 to reverse, preventing the push gear 3101 from driving the transmission worm gear 3103 to reverse, thus eliminating transmission backlash and ensuring transmission accuracy. The cooperation between the positioning protrusion 3102 and the positioning groove 3104 ensures precise assembly between the push gear 3101 and the transmission worm gear 3103, reducing transmission failures caused by assembly errors.

[0057] Through a rational transmission design and the application of the elastic fastening component 3200, the auxiliary device 3000 can accurately and stably transmit the power of the drive device 4000 to the working panel 2000, achieving synchronous coordination between the working panel 2000 and the screw unwinding action of the threaded die rod 1000, thus improving the stability and reliability of the unwinding process. Simultaneously, the characteristics of the elastic fastening component 3200 eliminate the need for the drive device 4000 to reverse during the mold closing process; the push rack 3001 can be returned to its original position directly through the mold closing action, significantly reducing the operation cycle, improving equipment efficiency, and avoiding the wear and tear caused by frequent forward and reverse rotation of the drive device 4000.

[0058] like Figure 7As shown, in this embodiment, the meshing assembly 1100 includes a rotating gear 1101 fixedly disposed at the lower end of the helical mold rod 1000 and a driven gear 1102 meshing with the rotating gear 1101. The driven gear 1102 meshes with the drive gear 4200. The drive device 4000 drives the helical mold rod 1000 to rotate and unscrew through the drive gear 4200, the driven gear 1102 and the rotating gear 1101.

[0059] Specifically, the stirring rod 1000 is a slender rod-shaped structure with a stirring thread 1001 at its upper end. The specifications and shape of this thread are designed according to the actual stirring requirements of the plastic product, and are used to form the thread structure of the plastic product in the mold. The lower end is provided with an engagement component 1100, through which a connection is established with the drive device 4000.

[0060] Specifically, the screw reel rod 1000 is connected to the drive device 4000 via the meshing assembly 1100. The meshing assembly 1100 includes a rotating gear 1101 fixedly disposed at the lower end of the screw reel rod 1000 and a driven gear 1102 meshing with the rotating gear 1101. The driven gear 1102 meshes with the drive gear 4200. The drive device 4000 drives the screw reel rod 1000 to rotate and unscrew via the drive gear 4200, the driven gear 1102, and the rotating gear 1101.

[0061] The helical mandrel 1000 is vertically arranged in the whole device. Its upper end passes through the unscrew slot 2001 of the working panel 2000, and its lower end is connected to the drive device 4000 through the meshing assembly 1100. It is located in the central transmission position of the whole device.

[0062] Driven by the drive unit 4000, the threaded rod 1000 rotates around its own axis, and the threaded rod 1001 at its upper end interacts with the plastic product to achieve the unscrew operation. At the same time, the rotation of the threaded rod 1000 is the core action of the entire unscrew process, providing the basis for the synchronous movement of the subsequent work panel 2000.

[0063] Through precise thread design and stable connection with the drive unit 4000, the helical die rod 1000 can rotate accurately and smoothly, thereby achieving efficient unscrewing operation and ensuring the thread quality of plastic products.

[0064] like Figure 7 As shown, in this embodiment, the drive motor 4100 is provided with a power gear 4101, and a connecting gear 4201 is fixedly provided at the lower end of the drive gear 4200. A transmission belt 4202 is sleeved between the power gear 4101 and the connecting gear 4201. The drive motor 4100 is connected to the drive gear 4200 through the power gear 4101, the connecting gear 4201 and the transmission belt 4202.

[0065] Specifically, the drive device 4000 includes a drive motor 4100 and a drive gear 4200 connected to the drive motor 4100. The drive motor 4100 is provided with a power gear 4101, and a connecting gear 4201 is fixedly provided at the lower end of the drive gear 4200. A transmission belt 4202 is sleeved between the power gear 4101 and the connecting gear 4201. The drive motor 4100 is connected to the drive gear 4200 through the power gear 4101, the connecting gear 4201 and the transmission belt 4202.

[0066] The drive motor 4100 is connected to the drive gear 4200 via the transmission belt 4202. The drive gear 4200 is meshed with the driven gear 1102 for driving the hobbing rod 1000 and the transmission gear 3106 for driving the auxiliary device 3000, thereby transmitting power to the hobbing rod 1000 and the auxiliary device 3000.

[0067] The drive motor 4100 is fixedly connected to the side wall of the main frame plate 6000. The drive gear 4200 is located below the drive motor 4100 and is connected to the drive motor 4100 through the connecting gear 4201 and the transmission belt 4202. It is located on the side of the device, which facilitates connection and power transmission with other transmission components.

[0068] The drive unit 4000 is the power source for the entire device, providing power for the rotation of the thread-removing die 1000 and the synchronous movement of the working panel 2000. The operation of the drive motor 4100 drives the drive gear 4200, which in turn drives the thread-removing die 1000 and the auxiliary device 3000, thus automating the thread removal process. Using the drive motor 4100 as the power source offers advantages such as stable power and adjustable speed. It can precisely control the rotation speed of the thread-removing die 1000 and the movement speed of the working panel 2000 according to different plastic products and thread removal requirements, ensuring the efficient and stable execution of the thread removal process.

[0069] like Figure 4 , Figure 5 As shown in the figure, in this embodiment, a main frame plate 6000 is also included. A first positioning post 6001 is fixedly provided on the main frame plate 6000. A first positioning hole 2003 corresponding to the first positioning post 6001 is provided on the working panel 2000. The working panel 2000 slides relative to the main frame plate 6000 through the first positioning post 6001 and the first positioning hole 2003.

[0070] An arrangement groove 6002 is recessed on the main frame plate 6000, and an inner arrangement plate 6100 is provided on the arrangement groove 6002.

[0071] Specifically, the main frame plate 6000 is the main supporting structure of the entire device, and a first positioning column 6001 is fixedly installed on it for positioning and connection with the working panel 2000. A layout groove 6002 is recessed in the main frame plate 6000, and an inner layout plate 6100 is provided in the layout groove 6002. The inner layout plate 6100 is used to install and fix various transmission components and limit blocks, etc.

[0072] The main frame plate 6000 is slidably connected to the working panel 2000 via the first positioning column 6001, and at the same time provides an installation base for the inner arrangement plate 6100. The inner arrangement plate 6100 is firmly connected to the main frame plate 6000 via bolts and other fasteners.

[0073] The main frame plate 6000 is located in the middle of the device and serves to support the working panel 2000. The working panel 2000 slides relative to it. The inner arrangement plate 6100 is installed in the arrangement groove 6002 of the main frame plate 6000, and various transmission components and limit blocks are installed on the inner arrangement plate 6100.

[0074] The main frame plate 6000 primarily serves a supporting and fixing function, providing a stable mounting foundation for all components of the entire device, ensuring accurate relative positions between components, and guaranteeing the normal operation of the device. Simultaneously, the arrangement slots 6002 and the inner arrangement plate 6100 facilitate centralized installation and management of transmission components, improving the device's structural compactness and maintainability.

[0075] The stable support and reasonable layout of the 6000 main frame plate ensure that the entire device has good stability and reliability during operation. The connection between the components is firm and the transmission is accurate, which can effectively avoid transmission failures caused by device vibration or loose components, thereby improving the service life and working efficiency of the device.

[0076] like Figure 9 , Figure 10 and Figure 12 As shown, in this embodiment, a first limiting block 6110 is fixedly provided on the inner arrangement plate 6100, and the first limiting block 6110 is provided with a first limiting groove 6111 that limits the sliding direction of the push rack 3001.

[0077] The fastening bolt 3201 is fixedly connected to the second limiting block 6120, and the fastening bolt 3201 is fixedly provided with the third limiting block 6130;

[0078] A fourth limiting block 6140 is fixedly installed on the inner arrangement plate 6100. The fourth limiting block 6140 is provided with a second limiting groove 6141 for positioning the transmission worm wheel 3103. A first positioning ring 6142 is provided on the transmission worm wheel 3103. A worm wheel through hole 6143 corresponding to the transmission worm wheel 3103 is provided on the inner arrangement plate 6100. A second positioning ring (not shown in the figure) corresponding to the first positioning ring 6142 is provided in the worm wheel through hole.

[0079] A fixing key 6145 is provided between the transmission worm gear 3103 and the transmission gear 3106 to form a fixed connection.

[0080] Furthermore, the inner arrangement plate 6100 is provided with a first inner groove 6201 corresponding to the first limiting block 6110, a second inner groove 6202 corresponding to the second limiting block 6120, and a third inner groove 6203 corresponding to the third limiting block 6130.

[0081] A first fixing hole 6301 is provided on the first limiting block 6110, and a second fixing hole 6302 corresponding to the first fixing hole 6301 is provided on the first inner groove 6201. The first limiting block 6110 and the inner arrangement plate 6100 are fixedly connected by first fixing members passing through the first fixing hole 6301 and the second fixing hole 6302.

[0082] A third fixing hole 6303 is provided on the second limiting block 6120, and a fourth fixing hole 6304 corresponding to the third fixing hole 6303 is provided on the second inner groove 6202. The second limiting block 6120 and the inner arrangement plate 6100 are fixedly connected by second fixing members passing through the third fixing hole 6303 and the fourth fixing hole 6304.

[0083] A fifth fixing hole 6305 is provided on the third limiting block 6130, and a sixth fixing hole 6306 corresponding to the fifth fixing hole 6305 is provided on the third inner groove 6203. The third limiting block 6130 and the inner arrangement plate 6100 are fixedly connected by a third fixing member passing through the fifth fixing hole 6305 and the sixth fixing hole 6306.

[0084] A seventh fixing hole 6307 is provided on the fourth limiting block 6140, and an eighth fixing hole 6308 corresponding to the seventh fixing hole 6307 is provided on the inner arrangement plate 6100. The fourth limiting block 6140 and the inner arrangement plate 6100 are fixedly connected by fourth fixing members passing through the seventh fixing hole 6307 and the eighth fixing hole 6308.

[0085] Specifically, the inner arrangement plate 6100 is a flat plate structure, installed in the arrangement groove 6002 of the main frame plate 6000. A first limiting block 6110, a second limiting block 6120, a third limiting block 6130, and a fourth limiting block 6140 are fixedly installed on the inner arrangement plate 6100, respectively used to limit the sliding direction of the pushing rack 3001, fix the elastic fastening assembly 3200, and position the transmission worm gear 3103. The first limiting block 6110 is provided with a first limiting groove 6111 to limit the sliding direction of the pushing rack 3001, and the fourth limiting block 6140 is provided with a second limiting groove 6141 for positioning the transmission worm gear 3103. A first positioning ring 6142 is provided on the transmission worm gear 3103, and a worm gear through hole 6143 corresponding to the transmission worm gear 3103 is provided on the inner arrangement plate 6100, with a second positioning ring corresponding to the first positioning ring 6142 disposed in the worm gear through hole. In addition, the inner arrangement plate 6100 is also provided with corresponding recessed grooves and fixing holes for fixing connection with each limiting block.

[0086] The first, second, third, and fourth fixing components are common fasteners such as bolts and rivets. The inner arrangement plate 6100 is firmly connected to the main frame plate 6000 through the fixing components. Each limiting block is fixedly connected to the inner arrangement plate 6100 by fixing components passing through the embedded grooves and fixing holes. The transmission worm gear 3103 is positioned and installed in the worm gear through hole 6143 of the inner arrangement plate 6100 through the cooperation of the first positioning ring 6142 and the second positioning ring, and is further fixed by the fourth limiting block 6140.

[0087] The inner arrangement plate 6100 is located in the arrangement groove 6002 of the main frame plate 6000, in the middle of the device. Each limiting block is distributed in different positions of the inner arrangement plate 6100 according to functional requirements, and cooperates with components such as the push rack 3001, the elastic fastening assembly 3200 and the transmission worm gear 3103 to form a complete transmission and limiting system.

[0088] The internal arrangement plate 6100 mainly serves to install and fix various transmission components and limit blocks, providing a stable installation platform for each component, ensuring accurate relative positions between components, and guaranteeing the normal operation of the transmission system. Simultaneously, by setting limit grooves and positioning rings, it precisely limits and positions components such as the push rack 3001 and the transmission worm gear 3103, improving the accuracy and stability of the transmission.

[0089] The rational design and precise installation of the internal arrangement plate 6100 ensure that all transmission components and limit blocks are firmly fixed in the device, with tight fit between components and accurate transmission. Precise limiting and positioning effectively avoid deviations and vibrations during transmission, improving the device's working accuracy and reliability, and providing a strong guarantee for achieving an efficient screw unwinding process.

[0090] like Figure 11 and Figure 13 As shown, in this embodiment, the ejector pin device 5000 includes an ejector pin column 5001 that passes through the placement groove 2002, an ejector pin support plate 5002 that is fixedly disposed below the ejector pin column 5001, and a pushing device for pushing the ejector pin support plate 5002 that pushes the ejector pin support plate 5002 connected to the lower end of the ejector pin support plate 5002.

[0091] The ejector pin support plate 5002 is located on the inner arrangement plate 6100. A push groove 5003 is provided at the bottom of the working panel 2000 to accommodate the ejector pin support plate 5002. When the push device pushes the ejector pin support plate 5002, the ejector pin 5001 is pushed out of the placement groove 2002, and the ejector pin support plate 5002 is at least partially located in the push groove 5003.

[0092] Specifically, the ejector pin 5001 is fixedly connected to the ejector pin support plate 5002, which is connected to the pushing device. The pushing device provides a pushing force, causing the ejector pin support plate 5002 to drive the ejector pin 5001 upward, thus ejecting the plastic product from the placement groove 2002. The ejector pin support plate 5002 is located on the inner arrangement plate 6100 and can move up and down within a certain range under the action of the pushing device. When the pushing device pushes the ejector pin support plate 5002, the ejector pin support plate 5002 is at least partially located in the impact groove 5003.

[0093] The ejector pin 5001 is vertically inserted into the placement slot 2002 of the work panel 2000. The ejector pin support plate 5002 is located below the ejector pin 5001 and on the inner arrangement plate 6100. The pushing device is located below the ejector pin support plate 5002 and is connected to it. The impact groove 5003 is located at the bottom of the work panel 2000, corresponding to the position of the ejector pin support plate 5002.

[0094] The main function of the ejector pin device 5000 is to eject the plastic product from the placement slot 2002 of the work panel 2000 after unscrewing, making it easy to remove the plastic product. The pushing device provides the pushing force, causing the ejector pin 5001 to move upward and complete the ejection action. The ejector pin support plate 5002 supports the ejector pin 5001 and transmits the pushing force, while the impact groove 5003 provides movement space for the ejector pin support plate 5002, ensuring the smooth progress of the ejection action.

[0095] The ejector pin device 5000 is simple and practical in design, accurately and reliably ejecting plastic products from the placement slot 2002, thus improving part removal efficiency. Through a reasonable layout and connection, the ejector pin device 5000 does not interfere with other components, ensuring the normal operation of the entire device.

[0096] like Figure 1 and Figure 4 As shown, in this embodiment, the drive motor 4100 is fixedly connected to the side wall of the main frame plate 6000, and a support rod 6400 for supporting the hobbing mold rod 1000 is fixedly provided on the side wall of the main frame plate 6000. The support rod 6400 is located below the hobbing mold rod 1000.

[0097] It also includes a bottom support plate 6500 disposed below the main frame plate 6000 and a base 6600 disposed below the bottom support plate 6500. A transmission groove 6501 for accommodating at least part of the transmission belt 4202 is provided at the bottom of the bottom support plate 6500.

[0098] In some embodiments (not shown in the figures), a second positioning post is provided on the base 6600, and a second positioning hole corresponding to the second positioning post is provided on both the bottom support plate 6500 and the main frame plate 6000. The second positioning post passes through the bottom support plate 6500 and the main frame plate 6000 in sequence, and the base 6600 positions the bottom support plate 6500 and the main frame plate 6000 through the second positioning post and the second positioning hole.

[0099] Specifically, a bottom support plate 6500 is disposed below the main frame plate 6000, and a base 6600 is disposed below the bottom support plate 6500. A transmission groove 6501, for accommodating at least a portion of the transmission belt 4202, is provided at the bottom of the bottom support plate 6500 for accommodating and protecting the transmission belt 4202. In some embodiments, a second positioning post is provided on the base 6600, and second positioning holes corresponding to the second positioning post are provided on both the bottom support plate 6500 and the main frame plate 6000. The second positioning post passes sequentially through the bottom support plate 6500 and the main frame plate 6000, and the base 6600 positions the bottom support plate 6500 and the main frame plate 6000 through the second positioning post and the second positioning holes.

[0100] The bottom support plate 6500 and the main frame plate 6000 are positioned and connected through the second positioning post and the second positioning hole. The base 6600 is in direct contact with the bottom support plate 6500, providing bottom support for the entire device. The transmission belt 4202 is partially housed in the transmission groove 6501 of the bottom support plate 6500, serving to protect and guide the transmission belt 4202.

[0101] The bottom support plate 6500 is located below the main frame plate 6000, and the base 6600 is located below the bottom support plate 6500, forming a three-layer support structure. The conveyor groove 6501 is located at the bottom of the bottom support plate 6500, corresponding to the position of the transmission belt 4202. The second positioning post and the second positioning hole are located at corresponding positions on the base 6600, the bottom support plate 6500, and the main frame plate 6000, respectively, for positioning connection.

[0102] The base plate 6500 and the base 6600 primarily support the entire device, ensuring its stability during operation. The conveyor trough 6501 protects the transmission belt 4202 from interference and damage from external objects, while also guiding the belt to ensure its normal operation. The second positioning post and second positioning hole further improve the positioning accuracy between different parts of the device, ensuring the overall structural stability of the device.

[0103] The rational design and stable support of the base plate 6500 and the base 6600 ensure good stability and reliability of the entire device during operation, effectively withstanding various forces generated during operation and preventing shaking or displacement. The design of the transmission channel 6501 and the positioning column improves the safety and transmission accuracy of the device, providing a guarantee for its long-term stable operation.

[0104] The working process of the plastic screw-removing mold auxiliary screw-removing device provided by this utility model is as follows:

[0105] During the unscrewing process, the drive motor starts and drives the drive gear to rotate through the power gear, connecting gear and transmission belt.

[0106] The drive gear drives the spiral die rod to rotate through the driven gear and the rotating gear to achieve the unscrew operation; on the other hand, it drives the push rack to push the working panel through the transmission gear, transmission worm, transmission worm wheel, push gear and push rack, so that the working panel moves the plastic product away from the spiral thread of the spiral die rod.

[0107] After the screw unscrewing is completed, during the mold closing process, the moving mold exerts pressure on the working panel, pushing the ejector rack to its initial position. Due to the characteristics of the elastic fastening components, the ejector gear will not drive the transmission worm gear to reverse, and the ejector rack smoothly returns to its original position. Finally, the ejector device pushes the ejector pin support plate, causing the ejector pin to push the plastic product out of the placement slot on the working panel, completing the entire screw unscrewing process.

[0108] The thread-removing die rod is connected to the drive device through a meshing assembly. The working panel is equipped with a screw-removing slot and an ejector pin device. The push rack of the auxiliary device is driven by the drive device through the transmission assembly, so that the placement slot moves away synchronously with the screw-removing of the thread-removing die rod. This realizes that the screw-removing of the thread-removing die rod and the workpiece moving synchronously with the work panel are driven by the thread-removing die rod. This avoids relative jamming between the workpiece and the thread-removing die rod, and greatly improves the screw-removing efficiency and accuracy.

[0109] This utility model has many application scenarios, including but not limited to the following:

[0110] Suitable for plastic products that require complex thread structures (such as internal thread caps and bottle neck threads), especially in fields with high requirements for dimensional accuracy and surface quality, such as medical devices, food packaging, and consumer electronics.

[0111] It can be seamlessly integrated into existing injection molding machines to achieve full-cycle automation of "screw ejection-pushing-mold closing". For example, automotive parts manufacturers can use this device to improve production efficiency, reduce labor costs, and lower scrap rates due to operational errors.

[0112] In molds that need to produce multiple products simultaneously, synchronous transmission design ensures that the screw unwinding action of each cavity is consistent, avoiding mold damage or product defects caused by asynchronous actions.

[0113] The high torque characteristics offered by hydraulic motors make them suitable for large molds or high-frequency production scenarios (such as large-scale production of daily necessities). They are also more durable than stepper motors, reducing equipment downtime for maintenance.

Claims

1. A screw-removing device for a plastic agitator mold, characterized in that, include: The spiral mold rod has a spiral thread at its upper end and a meshing component at its lower end, and a drive device is connected to the meshing component. The working panel is provided with a screw unscrew slot through which the screw-stirring die rod can pass. The screw unscrew slot is provided with a placement slot corresponding to the screw-stirring thread, and a pin device is inserted at the bottom of the placement slot. The auxiliary device includes a push rack that pushes against the working panel and a transmission assembly that connects to the drive unit, wherein the drive unit is connected to the push rack through the transmission assembly; When the drive unit drives the spiral die rod to rotate and unscrew, the drive unit synchronously drives the push rack to push the working panel through the transmission component, so that the placement groove moves away from the spiral thread synchronously with the spiral die rod unscrewing.

2. The auxiliary screw-removing device for plastic agitator molds according to claim 1, characterized in that, The drive unit includes a drive motor and a drive gear connected to the drive motor. The transmission assembly includes a push gear that meshes with a push rack. A transmission worm wheel is tightly fitted to one side of the push gear. The transmission worm wheel is meshed with a transmission worm. A transmission gear is fixedly installed at the lower end of the transmission worm. The transmission gear is meshed with the drive gear. The drive unit drives the push rack to push the product away from the auger rod through the drive gear, transmission worm, transmission worm wheel, push gear, and push rack.

3. The auxiliary screw-removing device for plastic agitator molds according to claim 2, characterized in that, An elastic fastening assembly is provided between the push gear and the transmission worm gear. The elastic fastening assembly includes a fastening bolt that passes through the rotating shaft of the push gear and the transmission worm gear. A fastening nut is provided at one end of the fastening bolt. An abutment washer and a fastening spring are fitted on the fastening bolt. One end of the fastening spring pushes against the abutment washer, and the other end pushes against the push gear and makes the push gear fit tightly against the transmission worm gear. The transmission worm gear abuts against the fastening nut. A positioning protrusion is provided at one end of the push gear near the transmission worm gear, and a positioning groove corresponding to the positioning protrusion is provided on the transmission worm gear.

4. The auxiliary screw-removing device for plastic agitator molds according to claim 3, characterized in that, The meshing assembly includes a rotating gear fixedly disposed at the lower end of the helical mold rod and a driven gear meshing with the rotating gear. The driven gear meshes with the drive gear. The drive device drives the helical mold rod to rotate and unscrew through the drive gear, the driven gear, and the rotating gear.

5. The auxiliary screw-removing device for plastic auger molds according to claim 4, characterized in that, The drive motor is equipped with a power gear, and a connecting gear is fixedly installed at the lower end of the drive gear. A transmission belt is sleeved between the power gear and the connecting gear. The drive motor is connected to the drive gear through the power gear, the connecting gear and the transmission belt.

6. The auxiliary screw-removing device for plastic auger molds according to claim 5, characterized in that, It also includes a main frame plate, on which a first positioning post is fixedly installed, and on the working panel, a first positioning hole corresponding to the first positioning post is provided, and the working panel slides relative to the main frame plate through the first positioning post and the first positioning hole. The main frame plate has a recessed arrangement groove, and an inner arrangement plate is installed on the arrangement groove.

7. The auxiliary screw-removing device for plastic auger molds according to claim 6, characterized in that, A first limiting block is fixedly installed on the inner arrangement plate, and the first limiting block is provided with a first limiting groove that limits the sliding direction of the push rack; The fastening bolt is fixed with a second limiting block, and the fastening bolt is fixed with a third limiting block; A fourth limiting block is fixedly installed on the inner arrangement plate. The fourth limiting block is provided with a second limiting groove for positioning the transmission worm wheel. A first positioning ring is provided on the transmission worm wheel. A worm wheel through hole corresponding to the transmission worm wheel is provided on the inner arrangement plate. A second positioning ring corresponding to the first positioning ring is provided in the worm wheel through hole. A key is provided between the transmission worm gear and the transmission gear to form a fixed connection.

8. The auxiliary screw-removing device for plastic auger molds according to claim 7, characterized in that, The inner arrangement plate is provided with a first inner groove corresponding to the first limiting block, a second inner groove corresponding to the second limiting block, and a third inner groove corresponding to the third limiting block; A first fixing hole is provided on the first limiting block, and a second fixing hole corresponding to the first fixing hole is provided on the first inner groove. The first limiting block and the inner arrangement plate are fixedly connected by first fixing members passing through the first fixing hole and the second fixing hole. A third fixing hole is provided on the second limiting block, and a fourth fixing hole corresponding to the third fixing hole is provided on the second inner groove. The second limiting block and the inner arrangement plate are fixedly connected by second fixing members passing through the third fixing hole and the fourth fixing hole. A fifth fixing hole is provided on the third limiting block, and a sixth fixing hole corresponding to the fifth fixing hole is provided on the third inner groove. The third limiting block and the inner arrangement plate are fixedly connected by a third fixing member passing through the fifth fixing hole and the sixth fixing hole. A seventh fixing hole is provided on the fourth limiting block, and an eighth fixing hole corresponding to the seventh fixing hole is provided on the inner arrangement plate. The fourth limiting block and the inner arrangement plate are fixedly connected by a fourth fixing member passing through the seventh fixing hole and the eighth fixing hole.

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