Multi-shot vertical injection molding machine

Abstract

The application provides a multi-shot vertical injection molding machine, which comprises a base, a mounting bracket, a material rack, a rotating mechanism and an injection mechanism, at least two injection stations are sequentially arranged on the base along the outer side of the rotating mechanism, the material rack is installed on the rotating mechanism, so that the material rack is switched between the injection stations by the rotating mechanism, the injection mechanism is arranged at each injection station, the mounting bracket is arranged on the base through the middle part of the rotating mechanism, the injection mechanism comprises an injection head, an upper mold and a lower mold, the lower mold is installed on the base, and the injection head and the upper mold are arranged above the lower mold through the mounting bracket. The application can realize multi-shot injection molding, the space around the base is not occupied, the molded part with a long tail can be conveniently injection molded, the rotating mechanism can rotate without obstacles, the continuous circulation operation can be realized, the production efficiency is high, the operation is stable, the installation and disassembly are convenient, and the maintenance cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection molding machines, in particular to a multi-molding vertical injection molding machine. BACKGROUND

[0002] The injection molding machine is also called injection molding machine or injection machine, which is the main molding equipment for making various shaped plastic products by using thermoplastic or thermosetting plastic through a plastic molding mold. It is divided into vertical, horizontal and all-electric types. The traditional vertical injection molding machine mainly uses a plurality of vertical columns arranged around the machine base to install a set of injection molding mechanism. The upper mold base is arranged on the injection molding mechanism, and the lower mold base is fixed on the rotating disc of the machine base. The product can be molded by one-time injection molding. During the rotation of the rotating disc, the vertical columns around the rotating disc hinder the molding of long-tailed parts, which is not convenient for injection molding of long-tailed parts. SUMMARY

[0003] The present application provides a multi-molding vertical injection molding machine, which can realize multi-injection molding, the space around the machine base is not occupied, which is convenient for injection molding of long-tailed parts, realizes barrier-free rotation, continuous cycle operation, high production efficiency, stable operation, easy installation and disassembly, and low maintenance cost.

[0004] To achieve the above-mentioned purpose, the technical scheme is as follows:

[0005] A multi-molding vertical injection molding machine, comprising a machine base, a mounting bracket, a rack, a rotating mechanism and an injection molding mechanism, at least two injection molding stations are arranged in sequence along the outer side of the rotating mechanism on the machine base, the rack is installed on the rotating mechanism, so that the rack is switched between the injection molding stations by the rotating mechanism, the injection molding station is provided with an injection molding mechanism, the mounting bracket is arranged on the machine base through the middle part of the rotating mechanism, the injection molding mechanism comprises an injection head, an upper mold and a lower mold, the lower mold is installed on the machine base, and the injection head and the upper mold are arranged above the lower mold through the mounting bracket.

[0006] As a preferred scheme, the mounting bracket comprises a first C-shaped bracket and a second C-shaped bracket, the first C-shaped bracket and the second C-shaped bracket each comprise two C-shaped support plates and a bracket connecting plate connected between the two C-shaped support plates, and the rotating mechanism is sleeved outside the C-shaped support plates.

[0007] As a preferred scheme, the first C-shaped bracket and the second C-shaped bracket are integrally connected, the injection molding mechanism is installed at the upper end of the first C-shaped bracket and the second C-shaped bracket, and the lower end of the first C-shaped bracket and the second C-shaped bracket is connected with the machine base.

[0008] As a preferred scheme, the injection mechanism is provided with two mold closing cylinders for controlling the movement of the upper mold towards the lower mold and an injection cylinder for controlling the up-down movement of the injection head, the mold closing cylinders are installed on the C-shaped support plates, the first through-slots are formed between the two C-shaped support plates of the first C-shaped support and between the two C-shaped support plates of the second C-shaped support, the injection head of the injection mechanism extends downwards through the first through-slots, the movable joint of the mold closing cylinder is provided with a mold mounting plate for mounting the upper mold, and the mold mounting plate is provided with an injection head through-hole for the injection head to pass through.

[0009] As a preferred scheme, the rotating mechanism comprises a supporting plate and a rotating frame arranged on the supporting plate, the rotating frame is provided with a tooth pattern, and a motor is installed on the supporting plate, and a transmission gear on the motor is in meshing connection with the tooth pattern on the rotating frame.

[0010] As a preferred scheme, the supporting plate is provided with a plurality of spacers distributed along the rotating frame, the upper surface of the spacer is in frictional contact with the lower surface of the rotating frame, the supporting plate is provided with a limiting block for preventing the rotating frame from shaking up and down and a positioning bearing for positioning the position of the rotating frame, and the axis of the positioning bearing is parallel to the axis of the rotating frame.

[0011] As a preferred scheme, the rotating frame is a rotating ring, the rotating ring comprises at least two detachably connected circular arc racks, the circular arc racks are connected through connecting blocks, the circular arc racks are provided with first accommodation grooves corresponding to the connecting blocks, and the connecting blocks are installed in the first accommodation grooves.

[0012] As a preferred scheme, the base is provided with a lifting mechanism for controlling the up-down movement of the supporting plate, the lifting mechanism comprises a connecting arm and a driving assembly for driving the up-down movement of the connecting arm, one end of the connecting arm is connected with the supporting plate, the other end of the connecting arm is connected with the driving assembly, the base is provided with a vertically arranged guide rod, the connecting arm is provided with a sliding sleeve corresponding to the guide rod, and the upper end of the guide rod extends upwards through the sliding sleeve.

[0013] As a preferred scheme, the supporting plate comprises at least two splicing plates which are detachably connected, the splicing plates are connected through the connecting arm, the splicing plates are provided with second accommodation grooves corresponding to the connecting arm, and the connecting arm is installed in the second accommodation grooves.

[0014] As a preferred solution, the material rack is provided with at least one, the material rack has a connecting part and a loading part, the connecting part is connected with the rotating frame, the loading part extends radially outward away from the rotating frame, the loading part is provided with a positioning rod, the upper die and the lower die are both provided with a positioning groove corresponding to the positioning rod, the lower part of the lower die is provided with an ejection mechanism for jacking up the material rack, the ejection mechanism comprises a ejector pin plate and an ejector oil cylinder for controlling the up-down movement of the ejector pin plate, the ejector pin plate is provided with an ejector pin for jacking up the material rack, and the positioning groove on the lower die is provided with an ejector pin through hole for the upward extension of the ejector pin.

[0015] Compared with the prior art, the present application has obvious advantages and beneficial effects, specifically,

[0016] 1. By setting the mounting bracket, material rack, rotating mechanism and injection mechanism on the machine base, at least two injection stations are sequentially arranged outside the rotating mechanism, the material rack rotates with the rotating mechanism and switches between the above stations, and the injection mechanism successively injection molds products, so that multiple injection molding can be realized, the injection mechanism is installed on the machine base through the mounting bracket, so that the space around the machine base is not occupied, facilitating the injection of long molded parts at the tail, and realizing barrier-free rotation.

[0017] 2. By setting the rotating frame, three evenly distributed material racks are arranged on the rotating frame, and the material rack rotates one revolution to realize continuous cycle operation of product feeding, injection molding and discharging, so that the production efficiency is high.

[0018] 3. By setting the lifting mechanism on the machine base, the rotating mechanism and the material rack can be lowered and the lower die can be in place, the ejector mechanism is arranged below the lower die, the lifting mechanism and the ejector mechanism work synchronously when the material rack rises, so that the rotating mechanism and the material rack move upward at the same time, avoiding the phenomenon that the material rack is unevenly stressed and stuck.

[0019] 4. By setting a plurality of limiting blocks on the inner side of the rotating ring, the rotating frame is prevented from shaking up and down during rotation, a plurality of positioning bearings for positioning the position of the rotating frame are arranged on the outer side of the rotating frame, the axis of the positioning bearing is parallel to the axis of the rotating frame, the rotating stability of the rotating frame is improved, and the injection molding machine runs stably.

[0020] 5. By setting the detachable rotating frame and the supporting plate, the installation and disassembly are convenient, and the maintenance cost is low.

[0021] In order to more clearly illustrate the structural features, technical means and specific purposes and functions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments: BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the assembly structure schematic diagram of the embodiment of the present application;

[0023] Figure 2 is a top view of an embodiment of the present application;

[0024] Figure 3 is an exploded view of an embodiment of the present application;

[0025] Figure 4 is an assembly view of the mounting bracket and rotation mechanism of an embodiment of the present application;

[0026] Figure 5 is a structural view of the mounting bracket of an embodiment of the present application;

[0027] Figure 6 is an assembly view of the rotation mechanism and lifting mechanism of an embodiment of the present application;

[0028] Figure 7 is an exploded view of the rotation mechanism and lifting mechanism of an embodiment of the present application;

[0029] Figure 8 is a partial enlarged view of part A in Figure 7

[0030] Figure 9 is a sectional view of the lifting mechanism of an embodiment of the present application;

[0031] Figure 10 is a partial enlarged view of part B in Figure 9

[0032] Figure 11 is another perspective sectional view of the lifting mechanism of an embodiment of the present application;

[0033] Figure 12 is a partial enlarged view of part C in Figure 11

[0034] Figure 13 is an exploded view of the rotation mechanism of an embodiment of the present application;

[0035] Figure 14 is a partial enlarged view of part D in Figure 13

[0036] Figure 15 is a partial enlarged view of part E in Figure 13

[0037] Explanation of the attached drawings:

[0038] 10 - machine base; 20 - injection mechanism; 21 - hopper;

[0039] 22 - injection head; 23 - upper mold; 24 - lower mold;

[0040] ​​​​​241-positioning groove; 25-die closing oil cylinder; 26-die mounting plate;

[0041] 261-injection head through hole; 27-injection oil cylinder; 30-mounting support;

[0042] 31-first C-shaped support; 32-second C-shaped support; 33-C-shaped support plate;

[0043] 34-support connecting plate; 35-first through groove; 36-second through groove;

[0044] 37-port; 40-rotating mechanism; 41-support plate;

[0045] 411-splicing plate; 412-second accommodation groove; 42-rotating frame;

[0046] 421-circular arc rack; 423-connecting block; 424-first accommodation groove;

[0047] 43-arc-shaped guard plate; 44-annular guard plate; 45-motor;

[0048] 451-transmission gear; 46-limiting block; 461-limiting plate;

[0049] 47-gasket; 48-positioning bearing; 49-positioning gear;

[0050] 50-connecting arm; 501-sliding sleeve; 51-lifting oil cylinder;

[0051] 52-oil cylinder mounting seat; 53-guiding rod; 54-ejecting oil cylinder;

[0052] 55-ejector pin plate; 551-ejector pin; 60-material rack;

[0053] 61-connecting part; 62-feeding part; 621-positioning rod;

[0054] 622-opening. DETAILED DESCRIPTION

[0055] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the indicated position or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0056] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] As shown in Figures 1-15 A multi-molding vertical injection molding machine, comprising a base 10, a mounting bracket 30, a material rack 60, a rotating mechanism 40 and an injection molding mechanism 20, at least two injection molding stations are provided on the base 10 along the outer side of the rotating mechanism 40, the material rack 60 is mounted on the rotating mechanism 40, so that the material rack 60 is switched between the injection molding stations by the rotating mechanism 40, the injection molding mechanism 20 is provided at each injection molding station, the mounting bracket 30 is provided on the base 10 through the middle part of the rotating mechanism 40, the injection molding mechanism 20 comprises an injection head 22, an upper mold 23 and a lower mold 24, the lower mold 24 is mounted on the base 10, the injection head 22 and the upper mold 23 are provided above the lower mold 24 through the mounting bracket 30, the injection molding mechanism 20 further comprises a hopper 21, the hopper 21 is communicated with the injection head 22 through a feeding channel.

[0058] In the embodiment, the mounting bracket 30 comprises a first C-shaped bracket 31 and a second C-shaped bracket 32, the first C-shaped bracket 31 and the second C-shaped bracket 32 each comprise two C-shaped support plates 33 and a bracket connecting plate 34 connected between the two C-shaped support plates 33, the rotating mechanism 40 is sleeved outside the C-shaped support plate 33, the first C-shaped bracket 31 and the second C-shaped bracket 32 are integrally connected, the included angle between the C-shaped support plates 33 of the first C-shaped bracket 31 and the second C-shaped bracket 32 is 120 degrees, the injection molding mechanism 20 is mounted at the upper end of the first C-shaped bracket 31 and the second C-shaped bracket 32, the lower end of the first C-shaped bracket 31 and the second C-shaped bracket 32 is connected with the base 10, the injection molding mechanism 20 is provided with two mold closing oil cylinders 25 for controlling the movement of the upper mold 23 towards the lower mold 24 and an injection oil cylinder 27 for controlling the up-down movement of the injection head 22, the mold closing oil cylinder 25 is mounted on the C-shaped support plate 33, the first through slot 35 is formed between the two C-shaped support plates 33 of the first C-shaped bracket 31 and the two C-shaped support plates 33 of the second C-shaped bracket 32, the injection head 22 of the injection molding mechanism 20 extends downward through the first through slot 35, the movable joint of the mold closing oil cylinder 25 is provided with a mold mounting plate 26 for mounting the upper mold 23, the mold mounting plate 26 is provided with an injection head through hole 261 for the injection head 22 to pass through.

[0059] The rotating mechanism 40 comprises a supporting plate 41 and a rotating frame 42 arranged on the supporting plate 41, the inner side wall of the rotating frame 42 is provided with a tooth pattern, a motor 45 is arranged on the supporting plate 41, a transmission gear 451 on the motor 45 is in meshing connection with the tooth pattern on the rotating frame 42, a plurality of positioning gears 49 are arranged on the supporting plate 41 and in meshing connection with the tooth pattern on the rotating frame 42, a plurality of gaskets 47 are arranged on the supporting plate 41 and distributed along the rotating frame 42, the upper surface of the gasket 47 is in frictional contact with the lower surface of the rotating frame 42, a plurality of limiting blocks 46 for preventing the rotating frame 42 from shaking up and down and a positioning bearing 48 for positioning the position of the rotating frame 42 are arranged on the supporting plate 41, the positioning bearing 48 is pressed against the outer side wall of the rotating frame 42, the axis of the positioning bearing 48 is parallel to the axis of the rotating frame 42, an arc-shaped guard plate 43 is arranged above the positioning bearing 48, the arc-shaped guard plate 43 is fixedly connected with the supporting plate 41, the limiting blocks 46 are annularly distributed on the inner side of the rotating frame 42, the limiting blocks 46 are arranged in an L shape, the limiting blocks 46 have outwardly protruding limiting plates 461, the limiting plates 461 are arranged above the rotating frame 42, and an annular guard plate 44 is arranged above the rotating frame 42; the annular guard plate 44 is connected with the limiting blocks 46 through bolts, the rotating frame 42 is a rotating ring, the rotating ring comprises two sections of circular arc racks 421 which are detachably connected, the two sections of circular arc racks 421 are connected through a connecting block 423, the circular arc racks 421 are provided with first relief grooves 424 corresponding to the connecting block 423, and the connecting block 423 is arranged in the first relief groove 424 through bolts.

[0060] It should be noted that, in the embodiment, the positioning bearing 48 can be replaced by a roller or other structure having the same positioning effect, and the positioning bearing 48 can be arranged on the rotating frame 42, a surrounding plate is arranged on the outer side of the rotating frame 42 and is in pressing contact with the positioning bearing 48.

[0061] The base 10 is provided with a lifting mechanism for controlling the up-and-down movement of the support plate 41, the lifting mechanism comprising a connecting arm 50 and a driving assembly for driving the up-and-down movement of the connecting arm 50, the driving assembly comprising a lifting oil cylinder 51 and an oil cylinder mounting seat 52 for mounting the lifting oil cylinder 51, one end of the connecting arm 50 being connected with the support plate 41 and the other end being connected with the oil cylinder mounting seat 52, the middle part of the mounting bracket 30 being provided with a vertically arranged second through slot 36, the lifting oil cylinder 51 and the oil cylinder mounting seat 52 being located in the second through slot 36, the mounting bracket 30 being provided with an opening 37 for the outward extension of the connecting arm 50, the opening 37 being in communication with the second through slot 36, the movable joint of the lifting oil cylinder 51 extending downward and being fixedly connected with the base 10, the base 10 being provided with a vertically arranged guide rod 53, the connecting arm 50 being provided with a sliding sleeve 501 corresponding to the guide rod 53, the upper end of the guide rod 53 extending upward through the sliding sleeve 501, the connecting arm 50 being provided with three connecting arms, the support plate 41 comprising three spliced plates 411 which are detachably connected, the three spliced plates 411 being connected through the connecting arms 50, the spliced plate 411 being provided with a second clearance slot 412 corresponding to the connecting arm 50, the connecting arm 50 being mounted in the second clearance slot 412 through bolts.

[0062] The material rack 60 is provided with three material racks 60, the three material racks 60 being uniformly arranged on the rotating frame 42, the material rack 60 having a connecting part 61 and a material loading part 62, the connecting part 61 being connected with the rotating frame 42, the material loading part 62 extending radially outward away from the rotating frame 42, the material loading part 62 being provided with an opening 622 for the partial exposure of the product to be injection molded, the material loading part 62 being provided with a positioning rod 621, the upper die 23 and the lower die 24 each being provided with a positioning slot 241 corresponding to the positioning rod 621, the lower part of the lower die 24 being provided with an ejection mechanism for jacking up the material rack 60, the ejection mechanism comprising a ejector pin plate 55 and an ejector oil cylinder 54 for controlling the up-and-down movement of the ejector pin plate 55, the ejector pin plate 55 being provided with an ejector pin 551 for jacking up the material rack 60, the positioning slot 241 on the lower die 24 being provided with an ejector pin through hole for the upward extension of the ejector pin 551, through the arrangement of the ejector oil cylinder 54, when the rotating frame 42 drives the material rack 60 to move upward under the control of the lifting oil cylinder 51, the ejector oil cylinder 54 works synchronously with the lifting oil cylinder 51, the ejector oil cylinder 54 drives the ejector pin plate 55 to move upward, the upper end of the ejector pin 551 abutting against the positioning rod 621, so that the material rack 60 is prevented from being stuck due to uneven force.

[0063] It should be further explained that in the present embodiment, the lifting oil cylinder 51 and the ejector oil cylinder 54 can be replaced by other mechanisms having the function of lifting, and are not limited to the lifting oil cylinder 51 and the ejector oil cylinder 54.

[0064] The working principle of the present application is as follows: the operator places the product to be injection molded on the rack 60, the motor 45 drives the rotating frame 42 to rotate 120 degrees, the rack 60 moves to the lower die 24 of the injection molding station, the lifting cylinder 51 contracts, the connecting arm 50 drives the supporting plate 41, the rotating frame 42 and the rack 60 to move downward, the lifting cylinder 51 stops when the positioning rod 621 on the rack 60 enters the positioning groove 241 on the lower die 24, the clamping cylinder 25 opens to push the mold mounting plate 26 downward, the upper die 23 and the lower die 24 are closed, the injection cylinder 27 controls the injection head 22 to move downward to perform the injection operation, the product is injection molded for the first time, the upper die 23 moves upward to the initial position, the lifting cylinder 51 opens, at the same time, the ejecting cylinder 54 controls the ejector pin plate 55 to move upward, the ejector pin 551 lifts the rack 60, the supporting plate 41, the rotating frame 42 and the rack 60 move upward synchronously, the motor 45 drives the rotating frame 42 to continue rotating 120 degrees, the rack 60 moves to the lower die 24 of the next injection molding station, the above steps are repeated, the product is injection molded for the second time, the motor 45 drives the rack 60 to continue rotating to the feeding station, the operator takes down the molded product, and the injection molding operation is completed.

[0065] In summary,

[0066] 1. By arranging the mounting bracket, the rack, the rotating mechanism and the injection mechanism on the machine base, arranging at least two injection molding stations outside the rotating mechanism in sequence, rotating the rack with the rotating mechanism and switching between the stations, and injection molding the product successively, multiple injection molding can be realized, the injection mechanism is arranged on the machine base through the mounting bracket, so that the space around the machine base is not occupied, facilitating the molding of long-tailed molded parts, and realizing barrier-free rotation.

[0067] 2. By arranging the rotating frame and arranging three evenly distributed racks on the rotating frame, the continuous circulation operation of product feeding, injection molding and discharging is realized every time the rack rotates one round, and the production efficiency is high.

[0068] 3. By arranging the lifting mechanism on the machine base, the rotating mechanism and the rack can be lowered and matched with the lower die, the ejecting mechanism is arranged below the lower die, when the rack rises, the lifting mechanism and the ejecting mechanism work synchronously, so that the rotating mechanism and the rack move upward at the same time, avoiding the phenomenon that the rack is unevenly stressed and stuck.

[0069] 4. By arranging multiple limiting blocks on the inner side of the rotating ring, the rotating frame is prevented from shaking up and down during rotation, multiple positioning bearings for positioning the position of the rotating frame are arranged on the outer side of the rotating frame, the axis of the positioning bearing is parallel to the axis of the rotating frame, the rotating stability of the rotating frame is improved, and the operation stability of the injection molding machine is ensured.

[0070] 5. By arranging the detachable rotating frame and the supporting plate, the installation and disassembly are convenient, and the maintenance cost is low.

[0071] The above merely illustrates the preferred embodiments of the present application, but should not be taken as limitations thereto. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments according to the technical spirit of the present application shall still fall within the scope of the technical solutions of the present application.

Claims

1. A multi-stage vertical injection molding machine characterized by, The injection molding machine comprises a base, a mounting bracket, a material rack, a rotating mechanism and an injection mechanism, at least two injection stations are arranged on the base along the outer side of the rotating mechanism, the material rack is installed on the rotating mechanism so that the material rack is switched between the injection stations by the rotating mechanism, the injection station is provided with the injection mechanism, the mounting bracket is arranged on the base through the middle of the rotating mechanism, the injection mechanism comprises an injection head, an upper mold and a lower mold, the lower mold is installed on the base, and the injection head and the upper mold are arranged above the lower mold through the mounting bracket; When the rotating mechanism drives the material rack to switch between the injection stations, the material rack is arranged between the upper mold and the lower mold, and when the upper mold and the lower mold are closed, the product to be injected on the material rack is located in the mold cavity for injection processing; The rotating mechanism comprises a supporting plate and a rotating frame arranged on the supporting plate, the material rack is provided with at least one, the material rack has a connecting part and a loading part, the connecting part is connected with the rotating frame, and the loading part extends radially outward away from the rotating frame; The base is provided with a lifting mechanism for controlling the upward and downward movement of the supporting plate, the supporting plate, the rotating frame and the material rack can move up and down synchronously, the lower side of the lower mold is provided with an ejection mechanism for lifting the material rack, and the lifting mechanism and the ejection mechanism work synchronously when the material rack rises.

2. The rotary dial of claim 1, wherein: The mounting bracket comprises a first C-shaped bracket and a second C-shaped bracket, the first C-shaped bracket and the second C-shaped bracket each comprise two C-shaped support plates and a bracket connecting plate connected between the two C-shaped support plates, and the rotating mechanism is sleeved outside the C-shaped support plates.

3. The rotary injection molding machine of claim 2, wherein, The first C-shaped bracket and the second C-shaped bracket are integrally connected, the injection mechanism is installed at the upper end of the first C-shaped bracket and the second C-shaped bracket, and the lower end of the first C-shaped bracket and the second C-shaped bracket is connected with the base.

4. The rotary injection molding machine of claim 3, wherein, The injection mechanism is provided with two mold closing oil cylinders for controlling the movement of the upper mold towards the lower mold and an injection oil cylinder for controlling the upward and downward movement of the injection head, the mold closing oil cylinders are installed on the C-shaped support plates, first through grooves are formed between the two C-shaped support plates of the first C-shaped bracket and the two C-shaped support plates of the second C-shaped bracket, the injection head of the injection mechanism extends downward through the first through grooves, the movable joint of the mold closing oil cylinder is provided with a mold mounting plate for mounting the upper mold, and the mold mounting plate is provided with an injection head through hole for the injection head to pass through.

5. The rotary dial of claim 1, wherein the dial is configured to be rotated in a first direction to increase the volume of the audio output and to be rotated in a second direction to decrease the volume of the audio output. The rotating frame is provided with a tooth pattern, a motor is installed on the supporting plate, and a transmission gear on the motor is engaged with the tooth pattern on the rotating frame.

6. The rotary injection molding machine of claim 5, wherein, The supporting plate is provided with a plurality of spacers distributed along the rotating frame, the upper surface of the spacer is in frictional contact with the lower surface of the rotating frame, the supporting plate is provided with a limiting block for preventing the rotating frame from shaking up and down and a positioning bearing for positioning the position of the rotating frame, and the axis of the positioning bearing is parallel to the axis of the rotating frame.

7. The rotary injection molding machine of claim 6, wherein, The rotating frame is a rotating ring, the rotating ring comprises at least two arc splines which are detachably connected, the arc splines are connected through connecting blocks, the arc splines are provided with first accommodation grooves corresponding to the connecting blocks, and the connecting blocks are installed in the first accommodation grooves.

8. The rotary dial of claim 1, wherein: The lifting mechanism comprises a connecting arm and a driving assembly for driving the connecting arm to move up and down, one end of the connecting arm is connected with the supporting plate, the other end is connected with the driving assembly, a vertical guide rod is arranged on the base, a sliding sleeve corresponding to the guide rod is arranged on the connecting arm, and the upper end of the guide rod extends upward through the sliding sleeve.

9. The rotary injection molding machine of claim 8, wherein, The supporting plate comprises at least two spliced plates which are detachably connected, the spliced plates are connected through the connecting arm, the spliced plates are provided with second accommodation grooves corresponding to the connecting arm, and the connecting arm is installed in the second accommodation grooves.

10. The rotary dial of claim 1, wherein, The loading part is provided with a positioning rod, the upper die and the lower die are provided with positioning grooves corresponding to the positioning rod, the ejection mechanism comprises a ejector rod and an ejector cylinder for controlling the ejector rod to move up and down, the ejector rod is provided with an ejector pin for lifting the rack, and the positioning groove on the lower die is provided with an ejector pin through hole for the ejector pin to extend upward.

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