Adjustable assembly type injection molding mechanism and method

Abstract

The present invention discloses an adjustable assembled injection molding mechanism and method, belonging to the field of injection molding technology. An adjustable assembled injection molding mechanism includes a base, and also includes: a cover shell with a material discharge trough at the lower end, fixedly mounted on the base, wherein a rotating shaft is inserted into the side wall of the cover shell, a turntable is fixedly mounted on the outer wall of the rotating shaft, a plurality of pairs of mounting grooves distributed in a circumference are arranged on the turntable, and an adjustment portion for driving the rotating shaft to rotate is arranged on the cover shell; a support plate, fixedly connected to the base, wherein a symmetrical left telescopic part and a right telescopic part are fixedly mounted on the support plate and the cover shell, and the telescopic ends of the left telescopic part and the right telescopic part are fixedly connected to a left cover mold and a right cover mold respectively; the present invention can conveniently produce injection molded parts of different models, with lower processing costs and higher efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to an adjustable assembled injection molding mechanism and method. Background Art

[0002] Injection molding is a common plastic processing method and also an industrial manufacturing process. In the injection molding process, plastic particles are heated and melted and then injected into the mold. Through high-pressure injection, the plastic fills the mold cavity, then cools and solidifies into shape, and finally the mold is removed to obtain the desired plastic product.

[0003] In the prior art, in order to meet the needs of customers, manufacturers often need to produce injection molded parts of different thicknesses or sizes, so they need to switch different injection molding equipment or replace different injection molds, such as producing worm gear blades of different thicknesses and sizes, which will lead to an increase in processing costs and waste a lot of processing time when changing molds. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that the injection molding equipment is not convenient for producing injection molded parts of different models, and to propose an adjustable assembled injection molding mechanism and method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An adjustable assembled injection molding mechanism comprises a base, and also comprises: a cover shell with a feed trough at the lower end, fixedly mounted on the base, wherein a rotating shaft is inserted into the side wall of the cover shell, a turntable is fixedly mounted on the outer wall of the rotating shaft, a plurality of pairs of mounting grooves distributed circumferentially are arranged on the turntable, and an adjusting portion for driving the rotating shaft to rotate is arranged on the cover shell; a support plate, fixedly connected to the base, wherein a left telescopic member and a right telescopic member symmetrical to each other are fixedly mounted on the support plate and the cover shell, the telescopic ends of the left telescopic member and the right telescopic member are respectively fixedly connected to a left cover mold and a right cover mold, middle molds with mold grooves are installed in the plurality of mounting grooves, the two middle molds in each pair of the mounting grooves are equal, and an injection molding tube is fixedly connected to the outer wall of the right cover mold; a material pushing component, arranged in the cover shell, and the material pushing component is used to push the mold groove.

[0007] In order to facilitate the production of injection molded parts of different thicknesses and sizes, preferably, the adjusting part includes a driving motor fixedly mounted on the cover shell, and a polygonal hole is provided at one end of the rotating shaft, wherein a polygonal rod is inserted into the polygonal hole, and the polygonal rod is rotatably connected to the inner wall of the cover shell, and the output shaft of the driving motor is connected to the polygonal rod by two meshing transmission gears.

[0008] In order to increase the service life of the middle mold, preferably, a driven gear is fixedly mounted on one end of the rotating shaft, and a linkage component for driving the driven gear to reciprocate forward and reverse is provided on the left cover mold.

[0009] In order to facilitate the replacement of the two middle molds, the linkage component further includes a sliding rod fixedly connected to the support plate, the support plate is rotatably connected with a reciprocating screw arranged parallel to the sliding rod, the outer wall of the reciprocating screw is threadedly connected with a reciprocating plate slidably connected to the sliding rod, wherein the reciprocating plate is fixedly connected with a mounting plate, the mounting plate is fixedly mounted with a first telescopic member, the telescopic end of the first telescopic member is fixedly mounted with a first rack meshing with a driven gear; one end of the reciprocating screw is mounted with a passive gear through a one-way bearing, and a second rack meshing with the passive gear is fixedly mounted on the left cover mold.

[0010] In order to prevent the middle mold from being worn by the right cover mold, preferably, a limit plate is fixedly installed on the outer wall of one end of the rotating shaft, and the limit plate is elastically connected to the outer wall of the cover shell through an elastic member, wherein an elastic push plate is fixedly connected to the left cover mold, and when the elastic push plate moves linearly with the left cover mold, the elastic push plate will be pressed against the outer wall of the limit plate.

[0011] In order to facilitate the ejection of the injection molded parts in the mold groove, the ejection component further includes two sleeves fixedly connected to the inner wall of the cover shell, and the open ends of the two sleeves are sleeved with ejector rods, and the ejector rods are elastically connected to the inner wall of the sleeve by a return spring, wherein the two ejector rods are symmetrically arranged on both sides of the left cover mold, and the ends of the two ejector rods are respectively facing the two mold grooves, the elastic member is an elastic air bag, and the first intake pipe and the first exhaust pipe are fixedly connected to the elastic member, the end of the first exhaust pipe is connected to the sleeve, and the sleeve is provided with an exhaust hole with a diameter half that of the first exhaust pipe.

[0012] In order to facilitate demolding of the injection-molded parts in the mold groove, further, the middle mold is slidably connected in the mounting groove, and the middle mold and the inner wall of the mounting groove are elastically connected by a shaking spring, wherein the outer wall of the middle mold is fixedly connected with a first protrusion, and the inner wall of the cover shell is fixedly connected with a plurality of arc-shaped second protrusions, and when the middle mold rotates with the turntable and passes through the discharge chute, the plurality of second protrusions will press the first protrusion in turn.

[0013] In order to automatically dissipate the heat of the middle mold, further, a telescopic airbag is fixedly installed between the middle mold and the inner wall of the mounting groove, and a second intake pipe and a second exhaust pipe are fixedly connected to the telescopic airbag, wherein a heat dissipation pipe is fixedly installed in the middle mold, and one end of the second exhaust pipe is fixedly connected and communicated with one end of the heat dissipation pipe.

[0014] In order to improve the demoulding efficiency, preferably, the cover shell is inclined to the base, and the angle between the cover shell and the base is 20°-45°.

[0015] An injection molding method of an injection molding mechanism, the operation steps are as follows:

[0016] Step 1: Make the left cover mold and the right cover mold press against two sides of one of the middle molds respectively;

[0017] Step 2: inject the rubber into the mold cavity through the injection tube, and allow the rubber to cool and set;

[0018] Step 3: Replace the two pairs of middle molds and complete the demoulding work;

[0019] Step 4: Repeat the above steps 1 to 3 to complete the production of multiple groups of injection molded parts;

[0020] Step 5: Start the drive motor until the required middle mold moves between the left cover mold and the right cover mold;

[0021] Step 6: Turn off the drive motor and repeat the above steps 1 to 3 to complete the production of multiple groups of injection molded parts.

[0022] Compared with the prior art, the present invention provides an adjustable assembled injection molding mechanism, which has the following beneficial effects:

[0023] 1. The adjustable assembled injection molding mechanism drives the turntable to rotate through the driving motor, and the turntable can drive multiple sets of middle molds to sweep in a circle, so that the replacement of the middle mold can be completed quickly, thereby facilitating the production of different types of injection molded parts, with lower processing costs and higher efficiency.

[0024] 2. The adjustable assembled injection molding mechanism drives the left cover mold away from the middle mold through the left telescopic member, and the two adjacent and identical middle molds will be swapped, thereby avoiding the repeated use of a single middle mold, improving the service life of the middle mold, and also facilitating the injection molded parts in the middle mold to have sufficient cooling time, reducing the occurrence of stress concentration on the injection molded parts caused by rapid cooling, and indirectly improving the performance of the injection molded parts.

[0025] 3. In the adjustable assembled injection molding mechanism, when the left cover mold moves away from the middle mold, the limit plate will drive the middle mold on the turntable to move away from the right cover mold through the rotating shaft. Therefore, when the turntable rotates, the middle mold will not rub against the right cover mold, thereby increasing the service life of the right cover mold and indirectly reducing the injection molding cost.

[0026] 4. The adjustable assembled injection molding mechanism presses the elastic part through the limit plate, and the ejector rod in the sleeve is pushed toward the mold groove of the middle mold under the action of air pressure, so that the injection molded part in the mold groove can be ejected, thereby completing the automatic unloading work.

[0027] 5. The adjustable assembled injection molding mechanism, through the circular sweeping middle mold, will drive the first protrusion to sweep over multiple second protrusions in sequence. The middle mold will slide back and forth in the installation groove under the action of the multiple second protrusions and the shaking spring, so that the injection molded parts in the mold groove can be loosened to facilitate the demoulding of the injection molded parts.

[0028] 6. The adjustable assembled injection molding mechanism indirectly squeezes and stretches the telescopic airbag through the middle mold. The second exhaust pipe will transport the airflow into the heat pipe and discharge it from the end of the heat pipe. The heat pipe can dissipate the heat of the middle mold and significantly improve the demoulding efficiency of subsequent injection molded parts under the action of shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the first-view axonometric structure of an adjustable assembled injection molding mechanism proposed by the present invention;

[0030] Figure 2 This is a schematic diagram of the axonometric structure from a second viewing angle of an adjustable assembled injection molding mechanism proposed by the present invention;

[0031] Figure 3 A schematic diagram of the partial axonometric structure of an adjustable assembled injection molding mechanism proposed by the present invention Figure 1 ;

[0032] Figure 4 It is a schematic diagram of a partially cutaway axonometric structure of an adjustable assembled injection molding mechanism proposed by the present invention;

[0033] Figure 5 A schematic diagram of the partial axonometric structure of an adjustable assembled injection molding mechanism proposed by the present invention Figure 2 ;

[0034] Figure 6 A schematic diagram of the partial axonometric structure of an adjustable assembled injection molding mechanism proposed by the present invention Figure 3 ;

[0035] Figure 7 This is a schematic diagram of the axonometric structure of an adjustable assembled injection molding mechanism proposed by the present invention;

[0036] Figure 8 The present invention is a schematic diagram of the isometric structure of a center mold of an adjustable assembled injection molding mechanism.

[0037] In the figure: 1, base; 2, cover; 3, feed chute; 4, rotating shaft; 5, turntable; 6, support plate; 7, left telescopic member; 8, left cover mold; 9, right cover mold; 10, right telescopic member; 11, mounting groove; 12, middle mold; 13, mold groove; 14, polygonal hole; 15, polygonal rod; 16, driving motor; 17, transmission gear; 18, driven gear; 19, slide rod; 20, reciprocating screw; 21, reciprocating plate; 22, mounting plate; 23, the A telescopic member; 24, a first rack; 25, a second rack; 26, a passive gear; 27, a limit plate; 28, an elastic member; 29, a shaking spring; 30, a first protrusion; 31, an elastic push plate; 32, a sleeve; 33, a push rod; 34, a first exhaust pipe; 35, a first intake pipe; 36, an exhaust hole; 37, a telescopic airbag; 38, a second exhaust pipe; 39, a heat dissipation pipe; 40, a second intake pipe; 41, a second protrusion; 42, an injection molding pipe. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] Embodiment 1:

[0041] Reference Figure 1-Figure 8, an adjustable assembled injection molding mechanism, including a base 1 for supporting the entire device, and also including: a cover shell 2 with a material discharge trough 3 at the lower end, fixedly installed on the base 1, the material discharge trough 3 is used to discharge the injection molded blank, wherein the side wall of the cover shell 2 is plugged with a rotating shaft 4, and a turntable 5 is fixedly installed on the outer wall of the rotating shaft 4, and a plurality of pairs of mounting grooves 11 distributed circumferentially are provided on the turntable 5, and the preferred number of mounting grooves 11 in the present application is 6, and the cover shell 2 is provided with an adjusting portion for driving the rotating shaft 4 to rotate; a support plate 6, fixedly connected to the base 1, wherein the support plate 6 and the cover shell 2 are fixedly installed with a left telescopic member 7 and a right telescopic member 10 that are symmetrical to each other, and the left telescopic member 7 and the right telescopic member 10 are fixedly installed. The telescopic parts 10 are all electric telescopic rods. The telescopic ends of the left telescopic parts 7 and the right telescopic parts 10 are fixedly connected to the left cover mold 8 and the right cover mold 9 respectively. A middle mold 12 with a mold groove 13 is installed in multiple installation grooves 11. The two middle molds 12 in each pair of installation grooves 11 are equal, and the models of the multiple pairs of middle molds 12 are different. The mold groove 13 in this application is mainly used for the production of worm gear blades. The outer wall of the right cover mold 9 is fixedly connected to an injection molding tube 42; a top material component is arranged in the cover shell 2, and the top material component is used to press the mold groove 13. A heat dissipation component for heat dissipation is installed in the left cover mold 8 and the right cover mold 9. The heat dissipation component can use a liquid cooling structure commonly used in the field, which will not be introduced in detail in this application.

[0042] When in use, the left telescopic member 7 and the right telescopic member 10 respectively drive the left cover mold 8 and the right cover mold 9 to press against the two sides of one of the middle molds 12. At this time, the left cover mold 8 and the right cover mold 9 seal the two ends of the mold groove 13, and then the rubber is injected into the mold groove 13 of the middle mold 12 through the injection tube 42. The rubber is cooled in the mold groove 13 to complete the injection molding process. Finally, the workpiece in the mold groove 13 can be ejected through the ejecting component. When workpieces of different thicknesses or sizes need to be injection molded, the rotating shaft 4 can be driven to rotate through the adjusting part, and the rotating shaft 4 can drive the turntable 5 to rotate, and the turntable 5 can drive multiple groups of middle molds 12 to sweep in a circle until the required middle mold 12 is located between the left cover mold 8 and the right cover mold 9. The replacement of the middle mold 12 can be quickly completed, thereby facilitating the production of injection molded parts of different models, with lower processing costs and higher efficiency.

[0043] Embodiment 2:

[0044] Reference Figure 4 , Figure 6 as well as Figure 7 , which is basically the same as Example 1, and further discloses a specific implementation plan of the adjustment unit.

[0045] The adjustment part includes a driving motor 16 fixedly mounted on the housing 2, and a polygonal hole 14 is provided at one end of the rotating shaft 4, which is a hexagonal hole in the present application, wherein a polygonal rod 15 is inserted into the polygonal hole 14, and the polygonal rod 15 is rotatably connected to the inner wall of the housing 2, and the output shaft of the driving motor 16 is connected to the polygonal rod 15 through two meshing transmission gears 17;

[0046] When workpieces of different thicknesses or sizes need to be injection molded, the drive motor 16 is started. The drive motor 16 can drive the polygonal rod 15 to rotate through two meshing transmission gears 17. The polygonal rod 15 will drive the rotating shaft 4 to rotate. The rotating shaft 4 can drive the turntable 5 to rotate. The turntable 5 can drive multiple sets of middle molds 12 to sweep in a circle until the required middle mold 12 is located between the left cover mold 8 and the right cover mold 9. Then, the drive motor 16 is turned off, and the replacement of the middle mold 12 can be quickly completed, thereby facilitating the production of injection molded parts of different models, with lower processing costs and higher efficiency.

[0047] Embodiment three:

[0048] Reference Figure 3 and Figure 6 , which is basically the same as the second embodiment, and further, a specific implementation scheme of replacing two middle molds 12 of the same type is specifically added.

[0049] A driven gear 18 is fixedly mounted on one end of the rotating shaft 4, and a linkage component for driving the driven gear 18 to reciprocate forward and reverse is provided on the left cover mold 8, and the linkage component includes a slide rod 19 fixedly connected to the support plate 6, and a reciprocating screw 20 arranged parallel to the slide rod 19 is rotatably connected to the support plate 6, and a reciprocating plate 21 slidably connected to the slide rod 19 is threadedly connected to the outer wall of the reciprocating screw 20. When the reciprocating screw 20 rotates, the reciprocating plate 21 reciprocates on the outer wall of the reciprocating screw 20. Among them, a mounting plate 22 is fixedly connected to the reciprocating plate 21, and a first telescopic member 23 is fixedly mounted on the mounting plate 22. The first telescopic member 23 is an electric telescopic rod, and a first rack 24 meshingly connected to the driven gear 18 is fixedly mounted on the telescopic end of the first telescopic member 23; a passive gear 26 is mounted on one end of the reciprocating screw 20 through a one-way bearing, and a second rack 25 meshingly connected to the passive gear 26 is fixedly mounted on the left cover mold 8;

[0050] After the injection molding, the left cover mold 8 is driven away from the middle mold 12 by the left telescopic member 7. At this time, the left cover mold 8 will drive the second rack 25 to move synchronously, and the second rack 25 will drive the driven gear 26 to rotate, and the driven gear 26 will also drive the reciprocating screw 20 to rotate. The reciprocating screw 20 will drive the reciprocating plate 21 of the outer wall to slide from one end to the other end, and the reciprocating plate 21 will drive the first rack 24 to move synchronously through the mounting plate 22, and the first rack 24 will drive the driven gear 18 to rotate, and the driven gear 18 will drive the rotating shaft 4 to rotate a fixed angle, and the rotating shaft 4 will drive the middle mold 12 to deviate circumferentially through the turntable 5, and the two adjacent and identical middle molds 12 will exchange positions, and then complete the next injection molding work again, so that during the injection molding, the two paired middle molds 12 can be By reciprocating and exchanging with each other, it is avoided to reuse a single middle mold 12, which increases the service life of the middle mold 12, and also facilitates the injection molded parts in the middle mold 12 to have sufficient cooling time, reduces the phenomenon of stress concentration of the injection molded parts caused by rapid cooling, and indirectly improves the performance of the injection molded parts. When the left telescopic member 7 drives the left cover mold 8 to approach the middle mold 12, the second rack 25 will drive the passive gear 26 to reverse. Since the passive gear 26 is installed on the reciprocating screw 20 through a one-way axle measurement, the reciprocating screw 20 will not reverse. When the second rack 25 drives the passive gear 26 to rotate forward next time, the reciprocating screw 20 will rotate again, the reciprocating plate 21 will slide to the other end of the reciprocating screw 20, and the rotating shaft 4 will drive the turntable 5 to reverse, so that the two middle molds 12 are exchanged again.

[0051] Embodiment 4:

[0052] Reference Figure 3 as well as Figure 5-Figure 7 , which is basically the same as the third embodiment, and further, a specific implementation scheme for driving the rotating disk 5 to move axially is specifically added.

[0053] A limit plate 27 is fixedly installed on the outer wall of one end of the rotating shaft 4, and the limit plate 27 is elastically connected to the outer wall of the cover shell 2 through an elastic member 28, wherein an elastic push plate 31 is fixedly connected to the left cover mold 8, and when the elastic push plate 31 moves linearly with the left cover mold 8, the elastic push plate 31 will be pressed against the outer wall of the limit plate 27.

[0054] When the left cover mold 8 moves away from the middle mold 12, the left cover mold 8 will also drive the elastic push plate 31 away from the far limit plate 27. The limit plate 27 will move away from the cover shell 2 under the elastic reset action of the elastic member 28. The limit plate 27 will drive the middle mold 12 on the turntable 5 away from the right cover mold 9 through the rotating shaft 4. Therefore, when the turntable 5 rotates, the middle mold 12 will not rub on the right cover mold 9, thereby increasing the service life of the right cover mold 9 and indirectly reducing the injection molding cost. When the left cover mold 8 is pressed against the middle mold 12, the elastic push plate 31 will press against the limit plate 27 again. The limit plate 27 will drive the middle mold 12 to approach the right cover mold 9 and compress the elastic member 28. When the axis of the rotating shaft 4 slides, the rotating shaft 4 will drive the polygonal hole 14 to slide on the polygonal rod 15.

[0055] Embodiment five:

[0056] Reference Figure 2 as well as Figure 4-Figure 8 , which is basically the same as Example 4, and further discloses a specific implementation scheme of the top material component.

[0057] The ejecting component includes two sleeves 32 fixedly connected to the inner wall of the cover shell 2, one end of the sleeve 32 is open, and the other end is not open, the open ends of the two sleeves 32 are sleeved with ejector rods 33, and the ejector rods 33 are elastically connected to the inner wall of the sleeve 32 by a return spring, which is not shown in the figure, wherein the two ejector rods 33 are symmetrically arranged on both sides of the left cover mold 8, and the ends of the two ejector rods 33 are respectively facing the two mold grooves 13, the elastic member 28 is an elastic air bag, and the elastic member 28 is fixedly connected with a first intake pipe 35 and a first exhaust pipe 34, the end of the first exhaust pipe 34 is connected to the sleeve 32, and the sleeve 32 is provided with an exhaust hole 36 with a diameter half that of the first exhaust pipe 34.

[0058] When the elastic member 28 is compressed, the elastic member 28 will blow air to the sleeve 32 through the first exhaust pipe 34, and the ejector pin 33 in the sleeve 32 will be pushed toward the mold groove 13 of the middle mold 12 under the action of air pressure, so as to eject the injection molded part in the mold groove 13, thereby completing the automatic unloading work. At this time, the return spring in the sleeve 32 will drive the ejector pin 33 to slide in the opposite direction and return to its original position, and the exhaust hole 36 will slowly discharge the gas in the sleeve 32, and the exhaust speed is half of the gas transmission speed of the first exhaust pipe 34.

[0059] The middle mold 12 is slidably connected in the mounting groove 11, and the middle mold 12 and the inner wall of the mounting groove 11 are elastically connected by a shaking spring 29, wherein the outer wall of the middle mold 12 is fixedly connected with a first protrusion 30, and the inner wall of the cover shell 2 is fixedly connected with a plurality of arc-shaped second protrusions 41, the number of the second protrusions 41 is 6-12, and the preferred number in this application is 10, and the shapes of the first protrusion 30 and the second protrusion 41 are both semicircular, and when the middle mold 12 rotates with the turntable 5 and passes through the discharge chute 3, the plurality of second protrusions 41 will press the first protrusion 30 in turn.

[0060] When the turntable 5 drives the middle mold 12 to sweep in a circle, the middle mold 12 will drive the first protrusion 30 to sweep over multiple second protrusions 41 in sequence. The middle mold 12 will slide back and forth in the mounting groove 11 under the action of the multiple second protrusions 41 and the shaking spring 29, so that the injection molded parts in the mold groove 13 can be loosened to facilitate the demolding of the injection molded parts.

[0061] A telescopic airbag 37 is fixedly installed between the middle mold 12 and the inner wall of the mounting groove 11, and a second air intake pipe 40 and a second exhaust pipe 38 are fixedly connected to the telescopic airbag 37. A heat dissipation pipe 39 is fixedly installed in the middle mold 12, and one end of the second exhaust pipe 38 is fixedly connected and communicated with one end of the heat dissipation pipe 39.

[0062] When the middle mold 12 slides back and forth in the mounting groove 11, the middle mold 12 will indirectly squeeze and stretch the telescopic airbag 37, and the telescopic airbag 37 will in turn inhale air through the second intake pipe 40 and exhaust air through the second exhaust pipe 38. The second exhaust pipe 38 will transport the airflow to the heat dissipation pipe 39 and exhaust it from the end of the heat dissipation pipe 39. When the airflow passes through the heat dissipation pipe 39, the heat dissipation pipe 39 can dissipate the heat for the middle mold 12 and, under the action of shaking, significantly improve the demolding efficiency of subsequent injection molded parts.

[0063] The cover shell 2 is inclined to the base 1 , and the angle between the cover shell 2 and the base 1 is 20°-45°. The preferred angle in the present application is 30°, so that the injection molded parts demoulded from the middle mold 12 are easier to be discharged from the cover shell 2 .

[0064] An injection molding method of an injection molding mechanism, the operation steps are as follows:

[0065] Step 1: Make the left cover mold 8 and the right cover mold 9 respectively press against the two sides of one of the middle molds 12;

[0066] Step 2: injecting the rubber into the mold cavity 13 through the injection tube 42, and allowing the rubber to cool and set;

[0067] Step 3: Replace the two paired middle molds 12 and complete the demoulding work;

[0068] Step 4: Repeat the above steps 1 to 3 to complete the production of multiple groups of injection molded parts;

[0069] Step 5: Start the drive motor 16 until the required middle mold 12 moves between the left cover mold 8 and the right cover mold 9;

[0070] Step 6: Turn off the drive motor 16 and repeat the above steps 1 to 3 to complete the production of multiple groups of injection molded parts.

[0071] When the adjustable assembled injection molding mechanism is in use, the left cover mold 8 and the right cover mold 9 are driven by the left telescopic member 7 and the right telescopic member 10 to respectively press against the two sides of one of the middle molds 12. At this time, the left cover mold 8 and the right cover mold 9 seal the two ends of the mold groove 13, and then the rubber is injected into the mold groove 13 of the middle mold 12 through the injection tube 42. The rubber is cooled in the mold groove 13 to complete the injection molding process. When workpieces of different thicknesses or sizes need to be injection molded, the drive motor 16 is started, and the drive motor 16 can drive the rotating shaft 4 to rotate through two meshing transmission gears 17, and the rotating shaft 4 can drive the rotating disk 5 to rotate, and the rotating disk 5 can drive multiple groups of middle molds 12 to sweep in a circle until the required middle mold 12 is located between the left cover mold 8 and the right cover mold 9, and then the drive motor 16 is turned off, and the replacement of the middle mold 12 can be quickly completed, thereby facilitating the production of injection molded parts of different models, with lower processing costs and higher efficiency.

[0072] After the injection molding, the left cover mold 8 is driven away from the middle mold 12 by the left telescopic member 7. At this time, the left cover mold 8 will drive the second rack 25 to move synchronously, and the second rack 25 will drive the driven gear 26 to rotate, and the driven gear 26 will also drive the reciprocating screw 20 to rotate. The reciprocating screw 20 will drive the reciprocating plate 21 of the outer wall to slide from one end to the other end, and the reciprocating plate 21 will drive the first rack 24 to move synchronously through the mounting plate 22, and the first rack 24 will drive the driven gear 18 to rotate, and the driven gear 18 will drive the rotating shaft 4 to rotate a fixed angle, and the rotating shaft 4 will drive the middle mold 12 to deviate circumferentially through the turntable 5, and the two adjacent and identical middle molds 12 will exchange positions, and then complete the next injection molding work again, so that during the injection molding, the two paired middle molds 12 can be By reciprocating and exchanging with each other, it is avoided to reuse a single middle mold 12, which increases the service life of the middle mold 12, and also facilitates the injection molded parts in the middle mold 12 to have sufficient cooling time, reduces the phenomenon of stress concentration of the injection molded parts caused by rapid cooling, and indirectly improves the performance of the injection molded parts. When the left telescopic member 7 drives the left cover mold 8 to approach the middle mold 12, the second rack 25 will drive the passive gear 26 to reverse. Since the passive gear 26 is installed on the reciprocating screw 20 through a one-way axle measurement, the reciprocating screw 20 will not reverse. When the second rack 25 drives the passive gear 26 to rotate forward next time, the reciprocating screw 20 will rotate again, the reciprocating plate 21 will slide to the other end of the reciprocating screw 20, and the rotating shaft 4 will drive the turntable 5 to reverse, so that the two middle molds 12 are exchanged again.

[0073] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. An adjustable assembled injection molding mechanism, comprising a base (1), characterized in that: Also includes: A cover shell (2) having a material discharge chute (3) at its lower end is fixedly mounted on the base (1). A rotating shaft (4) is inserted into the side wall of the housing (2), a rotating disk (5) is fixedly mounted on the outer wall of the rotating shaft (4), a plurality of pairs of mounting grooves (11) distributed in a circumference are provided on the rotating disk (5), and an adjusting portion for driving the rotating shaft (4) to rotate is provided on the housing (2); A support plate (6) is fixedly connected to the base (1). Wherein, a left telescopic member (7) and a right telescopic member (10) are fixedly mounted on the support plate (6) and the cover shell (2) and are symmetrical to each other; the telescopic ends of the left telescopic member (7) and the right telescopic member (10) are respectively fixedly connected to a left cover mold (8) and a right cover mold (9); a middle mold (12) with a mold groove (13) is installed in each of the plurality of mounting grooves (11); the two middle molds (12) in each pair of mounting grooves (11) are equal; and an injection molding tube (42) is fixedly connected to the outer wall of the right cover mold (9); A material pushing component is arranged in the cover shell (2), and is used to push the mold cavity (13); A driven gear (18) is fixedly mounted on one end of the rotating shaft (4), and a linkage component for driving the driven gear (18) to reciprocate in forward and reverse directions is provided on the left cover mold (8); The linkage component comprises a slide bar (19) fixedly connected to a support plate (6); a reciprocating screw (20) arranged parallel to the slide bar (19) is rotatably connected to the support plate (6); an outer wall of the reciprocating screw (20) is threadedly connected to a reciprocating plate (21) slidably connected to the slide bar (19); The reciprocating plate (21) is fixedly connected to a mounting plate (22), a first telescopic member (23) is fixedly mounted on the mounting plate (22), and a first rack (24) meshingly connected to a driven gear (18) is fixedly mounted on a telescopic end of the first telescopic member (23); A passive gear (26) is mounted on one end of the reciprocating screw (20) via a one-way bearing, and a second rack (25) meshingly connected with the passive gear (26) is fixedly mounted on the left cover mold (8); The middle mold (12) is slidably connected in the mounting groove (11), and the middle mold (12) and the inner wall of the mounting groove (11) are elastically connected via a shaking spring (29). The outer wall of the middle mold (12) is fixedly connected to a first protrusion (30), and the inner wall of the cover shell (2) is fixedly connected to a plurality of arc-shaped second protrusions (41), and when the middle mold (12) rotates with the turntable (5) and passes through the feed chute (3), the plurality of second protrusions (41) will press the first protrusion (30) in sequence.

2. The adjustable assembled injection molding mechanism according to claim 1, characterized in that: The adjustment portion comprises a drive motor (16) fixedly mounted on the housing (2); one end of the rotating shaft (4) is provided with a polygonal hole (14). A polygonal rod (15) is inserted into the polygonal hole (14), the polygonal rod (15) is rotatably connected to the inner wall of the cover shell (2), and the output shaft of the drive motor (16) and the polygonal rod (15) are connected via two meshing transmission gears (17).

3. The adjustable assembled injection molding mechanism according to claim 1, characterized in that: A limit plate (27) is fixedly mounted on the outer wall of one end of the rotating shaft (4), and the limit plate (27) is elastically connected to the outer wall of the housing (2) via an elastic member (28). Wherein, an elastic push plate (31) is fixedly connected to the left cover mold (8), and when the elastic push plate (31) moves linearly following the left cover mold (8), the elastic push plate (31) will press against the outer wall of the limit plate (27).

4. The adjustable assembled injection molding mechanism according to claim 3, characterized in that: The ejecting component comprises two sleeves (32) fixedly connected to the inner wall of the housing (2), the open ends of the two sleeves (32) are sleeved with ejector rods (33), and the ejector rods (33) are elastically connected to the inner wall of the sleeves (32) via a return spring. The two push rods (33) are symmetrically arranged on both sides of the left cover mold (8), and the ends of the two push rods (33) face the two mold grooves (13) respectively. The elastic member (28) is an elastic air bag. The elastic member (28) is fixedly connected to a first air intake pipe (35) and a first exhaust pipe (34). The end of the first exhaust pipe (34) is connected to a sleeve (32). The sleeve (32) is provided with an exhaust hole (36) with a diameter half that of the first exhaust pipe (34).

5. The adjustable assembled injection molding mechanism according to claim 1, characterized in that: A telescopic airbag (37) is fixedly mounted between the middle mold (12) and the inner wall of the mounting groove (11), and a second air intake pipe (40) and a second air discharge pipe (38) are fixedly connected to the telescopic airbag (37). A heat dissipation pipe (39) is fixedly installed in the middle mold (12), and one end of the second exhaust pipe (38) is fixedly connected to and communicated with one end of the heat dissipation pipe (39).

6. The adjustable assembled injection molding mechanism according to claim 1, characterized in that: The cover shell (2) is inclined with respect to the base (1), and the included angle between the cover shell (2) and the base (1) is 20°-45°.

7. An injection molding method of an injection molding mechanism, comprising an adjustable assembled injection molding mechanism according to any one of claims 1 to 6, characterized in that: The steps are as follows: Step 1: The left cover mold (8) and the right cover mold (9) are respectively pressed against two sides of one of the middle molds (12); Step 2: injecting rubber into the mold cavity (13) through the injection tube (42), and allowing the rubber to cool and set; Step 3: Replace the two paired middle molds (12) and complete the demoulding work; Step 4: Repeat the above steps 1 to 3 to complete the production of multiple groups of injection molded parts; Step 5: Start the drive motor (16) until the required middle mold (12) moves between the left cover mold (8) and the right cover mold (9); Step 6: Turn off the drive motor (16) and repeat the steps 1 to 3 to complete the production of multiple groups of injection molded parts.

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