Tooth twisting die

Abstract

The utility model discloses a thread twisting mold, which relates to the technical field of injection molds, and comprises a front mold and a rear mold, the front mold comprises a panel, a stripper plate and a plate A, and a front mold core is arranged in the plate A; the rear mold comprises a plate B, a bearing plate, mold feet and a bottom plate, and a rear mold core is arranged in the plate B; the rear mold further comprises a thread removing unit and an ejection unit; the ejection unit comprises a push plate and an ejection mechanism; a plurality of first inserts are arranged on the push plate, and a plurality of second inserts are arranged on the bearing plate; the thread removing unit comprises a driving mechanism and a plurality of rod-shaped inserts, one ends of the rod-shaped inserts are in threaded connection with the second inserts, and the other ends of the rod-shaped inserts are connected with the first inserts; the end, away from the second insert, of any rod-shaped insert is provided with threads, and an injection product is connected with the threads at the end. A plurality of inserts are arranged in the mold, so that threads of a plastic product can be subjected to one-time injection molding, and secondary processing of the threads of the plastic product is not needed; and due to the design of the thread removing unit and the ejection unit, the molded injection product can be conveniently separated from the mold.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a thread-twisting mold. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors and patterns, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into complex-shaped parts. Injection molding is suitable for mass production and complex-shaped products and other molding and processing fields.

[0003] At present, the development trend of injection molds is mainly towards high-precision and high-tech. The injection molding process can be roughly divided into several processes: mold closing, glue injection, pressure holding, cooling, mold opening, and product removal.

[0004] Some plastic products manufactured by injection molding need to be processed with threads, but it is not convenient to mold the threads on the plastic products in one go when some existing injection molds are used to manufacture plastic products.

[0005] Therefore, a twisting die is proposed. Utility Model Content

[0006] The utility model aims to overcome the deficiencies of the prior art and provide a thread twisting die.

[0007] The purpose of this utility model is achieved through the following technical solutions:

[0008] A thread-cutting die, comprising a front die and a rear die, wherein the front die comprises a panel, a nozzle plate and an A plate stacked in sequence, a front die core is arranged in the A plate, an injection port connected to the interior of the front die core is provided on the panel, and the rear die comprises a B plate, a support plate, a die foot and a bottom plate stacked in sequence, a rear die core is arranged in the B plate; the rear die also comprises a thread-cutting unit and an ejection unit, the ejection unit comprises a push plate and an ejection mechanism connected to each other, the push plate is slidably connected to the B plate, and after the mold is closed, the push plate abuts against the A plate and the B plate respectively; a plurality of first inserts are arranged on the push plate, and the support plate has a plurality of first inserts ... A plurality of second inserts corresponding to the plurality of first inserts are arranged on it; the stripping unit comprises a driving mechanism and a plurality of rod-shaped inserts, one end of any of the rod-shaped inserts is threadedly connected with the corresponding second insert, and the other end passes through the B plate, the rear mold core and the push plate in sequence and then is arranged in the corresponding first insert; a thread is arranged at one end of any of the rod-shaped inserts away from the second insert, and this end is extended into the front mold core during injection molding, and the molded injection molded product is threadedly connected with this end; during stripping, the driving mechanism is used to drive the plurality of rod-shaped inserts to rotate so that the rod-shaped inserts are separated from the molded injection molded product.

[0009] Furthermore, in the utility model, the driving mechanism comprises a hydraulic rod, a rack, a rotating shaft, a driving gear, a driving gear and a plurality of driven gears; the hydraulic rod is arranged on the supporting plate, and its execution end is connected to the rack; the rotating shaft is rotatably arranged in the supporting plate, the driving gear and the driving gear are both arranged on the rotating shaft, and the plurality of driven gears are arranged one by one on the plurality of rod-shaped inserts, and the plurality of driven gears are meshed with the driving gear at the same time; the rack extends into the supporting plate and meshes with the driving gear.

[0010] Further, in the utility model, the ejection mechanism includes a top plate, a plurality of push rods, a plurality of ejector pins and a plurality of return springs, any of the push rods is passed through the support plate and the B plate, the top plate is located between the support plate and the bottom plate, one end of any of the push rods is connected to the top plate, and the other end is connected to the push plate; one end of any of the ejector pins is connected to the top plate, and the other end passes through the support plate, the B plate, the rear mold core and the push plate in sequence and then extends into the corresponding first insert; the return spring is sleeved on the push rod, one end of which is connected to the top plate, and the other end is connected to the support plate.

[0011] Furthermore, in the present invention, the number of the first insert, the second insert and the rod-shaped insert is three.

[0012] The beneficial effects of the utility model are:

[0013] The utility model provides a thread-cutting mould, which can form the thread of a plastic product by injection molding at one time by arranging a plurality of inserts in the mould, without the need for secondary processing of the thread of the plastic product; the design of the thread stripping unit and the ejection unit facilitates the separation of the injection-molded product from the mould after molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0015] Figure 2 This is a schematic structural diagram of the rear mold of an embodiment of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the driving mechanism of an embodiment of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the driving mechanism of an embodiment of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the ejection mechanism of an embodiment of the utility model.

[0019] In the figure: 101-panel; 102-gate plate; 103-A plate; 104-injection port; 201-B plate; 202-supporting plate; 203-mold foot; 204-bottom plate; 205-push plate; 206-first insert; 207-second insert; 208-rod-shaped insert; 209-hydraulic rod; 2010-rack; 2011-rotating shaft; 2012-driving gear; 2013-active gear; 2014-driven gear; 2015-top plate; 2016-push rod; 2017-reset spring; 2018-throw pin; 2019-injection product. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 , the utility model provides a technical solution:

[0022] A thread-cutting die, comprising a front die and a rear die, wherein the front die comprises a panel 101, a nozzle plate 102 and an A plate 103 stacked in sequence, wherein the A plate 103 is provided with a front die core, and an injection port 104 communicating with the interior of the front die core is provided on the panel 101, and the rear die comprises a B plate 201, a support plate 202, a die foot 203 and a bottom plate 204 stacked in sequence, wherein the B plate 201 is provided with a rear die core; the rear die further comprises a thread-cutting unit and an ejection unit, wherein the ejection unit comprises a push plate 205 and an ejection mechanism connected to each other, wherein the push plate 205 is slidably connected to the B plate 201, and after the mold is closed, the push plate 205 is respectively in contact with the A plate 103 and the B plate 201; a plurality of first inserts 20 are provided on the push plate 205 6. A plurality of second inserts 207 corresponding to the plurality of first inserts 206 are arranged on the carrier plate 202; the tooth stripping unit includes a driving mechanism and a plurality of rod-shaped inserts 208, one end of any rod-shaped insert 208 is threadedly connected to the corresponding second insert 207, and the other end passes through the B plate 201, the rear mold core and the push plate 205 in sequence and then is arranged in the corresponding first insert 206; a thread is arranged at one end of any rod-shaped insert 208 away from the second insert 207, and this end is extended into the front mold core during injection molding, and the molded injection product 2019 is threadedly connected to this end after molding; during tooth stripping, the driving mechanism is used to drive the plurality of rod-shaped inserts 208 to rotate so that the rod-shaped insert 208 is separated from the molded injection product 2019.

[0023] In some implementations of the present embodiment, the driving mechanism includes a hydraulic rod 209, a rack 2010, a rotating shaft 2011, a driving gear 2012, a driving gear 2013 and a plurality of driven gears 2014. The hydraulic rod 209 is arranged on the carrier plate 202, and its execution end is connected to the rack 2010; the rotating shaft 2011 is rotatably arranged in the carrier plate 202, the driving gear 2012 and the driving gear 2013 are both arranged on the rotating shaft 2011, and a plurality of driven gears 2014 are arranged one by one on a plurality of rod-shaped inserts 208, and a plurality of driven gears 2014 are meshed with the driving gear 2013 at the same time; the rack 2010 extends into the carrier plate 202 and meshes with the driving gear 2012.

[0024] In some implementations of the present embodiment, the ejection mechanism includes a top plate 2015, a plurality of push rods 2016, a plurality of ejector pins 2018 and a plurality of return springs 2017, any push rod 2016 is inserted through the support plate 202 and the B plate 201, the top plate 2015 is located between the support plate 202 and the bottom plate 204, one end of any push rod 2016 is connected to the top plate 2015, and the other end is connected to the push plate 205; one end of any ejector pin 2018 is connected to the top plate 2015, and the other end passes through the support plate 202, the B plate 201, the rear mold core and the push plate 205 in sequence and then extends into the corresponding first insert 206; the return spring 2017 is sleeved on the push rod 2016, one end of which is connected to the top plate 2015, and the other end is connected to the support plate 202.

[0025] In some implementations of this embodiment, the number of the first insert 206 , the number of the second insert 207 , and the number of the rod-shaped insert 208 are all three.

[0026] Working principle:

[0027] During injection molding, the mold is in a mold-closing state (the front mold and the rear mold are closed together), and at this time, the two sides of the push plate 205 are respectively in contact with the A plate 103 and the B plate 201. Then the injection molding machine injects the liquid plastic into the front mold core through the injection port 104 on the panel 101. The mold core includes a front mold core and a rear mold core. The front mold core is installed in the A plate 103, and the rear mold core is installed in the B plate 201. After the front mold and the rear mold are closed, the push plate 205 is located between the front mold core and the rear mold core. After the liquid plastic in the front mold core is molded, it will be fixed on the three first inserts 206 on the push plate 205, and respectively connected with the rod-shaped inserts 208 by threads.

[0028] When the liquid plastic is formed, the mold is opened. During the mold opening process, the front mold does not move, and the rear mold moves. The rear mold is separated from the front mold under the control of the corresponding drive mechanism on the injection molding machine. After the rear mold is completely separated from the front mold, the tooth removal process begins.

[0029] When removing teeth, Figure 3 From the perspective of the hydraulic cylinder, the rack 2010 moves to the left under the drive of the hydraulic cylinder, the driving gear 2013 and the driving gear 2012 rotate counterclockwise, the three driven gears 2014 rotate clockwise under the drive of the driving gear 2013, and the three rod-shaped inserts 208 rotate clockwise synchronously. Figure 4 From the perspective of the present invention, since the rod-shaped insert 208 is threadedly connected to the second insert 207, the rod-shaped insert 208 moves toward the bottom plate 204 under the action of the threaded connection when rotating, and the end of the rod-shaped insert 208 connected to the injection molded product 2019 is separated from the injection molded product 2019, and then the hydraulic cylinder stops. After the stripping process is completed, the ejection process begins.

[0030] During ejection, the top plate 2015 moves toward the injection molded product 2019 under the push of the ejection device of the injection molding machine, and the push plate 205 also moves synchronously under the action of the push rod 2016, and the return spring 2017 is compressed during this process. During the movement of the top plate 2015 toward the injection molded product 2019, the ejector pin 2018 also moves accordingly and extends into the injection molded product 2019 to eject the injection molded product 2019, so that the injection molded product 2019 is separated from the first insert 206. The injection molded product 2019 separated from the first insert 206 is taken away by the matching manipulator. Then the corresponding ejection device of the injection molding machine is reset and returned (the ejection device does not eject the top plate 2015), and at this time, the top plate 2015 is reset under the action of the return spring 2017 (the top plate 2015 moves toward the bottom plate 204), and the push plate 205 also moves with the top plate 2015 during this process. After the push plate 205 is reset, it fits with the B plate 201.

[0031] After the push plate 205 and the top plate 2015 are reset, the hydraulic cylinder works. Figure 3 From the perspective of , the hydraulic cylinder works to move the rack 2010 to the right, the driving gear 2013 and the driving gear 2012 rotate clockwise, the three driven gears 2014 rotate counterclockwise under the drive of the driving gear 2013, and the three rod-shaped inserts 208 rotate counterclockwise synchronously. Figure 4 From the perspective of , since the rod-shaped insert 208 is threadedly connected to the second insert 207, when the rod-shaped insert 208 rotates, it moves toward the first insert 206 under the action of the threaded connection until the rod-shaped insert 208 returns to the injection position, and then the hydraulic cylinder stops moving.

[0032] Finally, the rear mold moves to close the front mold, and the injection molding of the next batch of products begins.

[0033] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A thread cutting die, comprising a front die and a rear die, wherein the front die comprises a panel (101), a nozzle plate (102) and an A plate (103) which are stacked in sequence, a front die core is arranged in the A plate (103), and an injection port (104) which is connected to the interior of the front die core is opened on the panel (101), characterized in that: The rear mold comprises a B plate (201), a support plate (202), a mold foot (203) and a bottom plate (204) which are stacked in sequence, and a rear mold core is arranged in the B plate (201); the rear mold also comprises a stripping unit and an ejection unit, and the ejection unit comprises a push plate (205) and an ejection mechanism which are connected to each other, and the push plate (205) is slidably connected to the B plate (201). After the mold is closed, the push plate (205) abuts against the A plate (103) and the B plate (201) respectively; a plurality of first inserts (206) are arranged on the push plate (205), and a plurality of second inserts (207) which correspond to the plurality of first inserts (206) are arranged on the support plate (202); the stripping unit comprises a stripping unit and an ejection unit, and the ejection unit comprises a push plate (205) and an ejection mechanism which are connected to each other. The push plate (205) is slidably connected to the B plate (201), and after the mold is closed, the push plate (205) abuts against the A plate (103) and the B plate (201) respectively. The tooth unit comprises a driving mechanism and a plurality of rod-shaped inserts (208), one end of any of the rod-shaped inserts (208) being threadedly connected to the corresponding second insert (207), and the other end of any of the rod-shaped inserts (208) passing through the B plate (201), the rear mold core and the push plate (205) in sequence and then being inserted into the corresponding first insert (206); a thread is provided at one end of any of the rod-shaped inserts (208) away from the second insert (207), and this end extends into the front mold core during injection molding, and the molded injection molded product (2019) is threadedly connected to this end; when stripping, the driving mechanism is used to drive the plurality of the rod-shaped inserts (208) to rotate so that the rod-shaped inserts (208) are separated from the molded injection molded product (2019).

2. A thread cutting die according to claim 1, characterized in that: The driving mechanism comprises a hydraulic rod (209), a rack (2010), a rotating shaft (2011), a driving gear (2012), a driving gear (2013) and a plurality of driven gears (2014); the hydraulic rod (209) is arranged on the carrier plate (202), and its execution end is connected to the rack (2010); the rotating shaft (2011) is rotatably arranged in the carrier plate (202); the driving gear (2012) and the driving gear (2013) are both arranged on the rotating shaft (211); a plurality of driven gears (2014) are arranged on a plurality of rod-shaped inserts (208) in a one-to-one correspondence; and a plurality of driven gears (2014) are simultaneously meshed with the driving gear (2013); and the rack (2010) is meshed with the driving gear (2012) after extending into the carrier plate (202).

3. A thread cutting die according to claim 1, characterized in that: The ejection mechanism comprises an ejection plate (2015), a plurality of push rods (2016), a plurality of ejector pins (2018) and a plurality of return springs (2017); any of the push rods (2016) is disposed through the support plate (202) and the B plate (201); the ejection plate (2015) is located between the support plate (202) and the bottom plate (204); one end of any of the push rods (2016) is connected to the ejection plate (2015), and the other end is connected to the ejector pins (2018). The push rod (2016) is connected to the top plate (2015); one end of any ejector pin (2018) is connected to the top plate (2015), and the other end passes through the support plate (202), the B plate (201), the rear mold core and the push plate (205) in sequence and then extends into the corresponding first insert (206); the return spring (2017) is sleeved on the push rod (2016), one end of which is connected to the top plate (2015), and the other end is connected to the support plate (202).

4. A thread cutting die according to claim 2, characterized in that: The number of the first insert (206), the second insert (207) and the rod-shaped insert (208) is three.

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