A vertical open-mold disc type injection molding machine and a vertical open-mold method

Abstract

The present application relates to the technical field of disc injection molding machine, especially to a vertical opening and closing mold disc injection molding machine and a vertical opening and closing mold method, comprising a leveling mechanism, a force bearing mechanism, an opening and closing mold mechanism and a fixed guide plate, the fixed guide plate is below the disc, the leveling mechanism comprises a first driving part and a balance plate, the first driving part is vertically arranged on the fixed guide plate and is used for driving the balance plate to move up and down parallel to the fixed guide plate, the force bearing mechanism is used for positioning the mold mounting plate on the balance plate, and the opening and closing mold mechanism is used for driving the opening and closing of the cover plate to complete the opening and closing mold action, the mold mounting plate is positioned on the balance plate through the leveling mechanism, and the mold mounting plate is vertically arranged with the opening and closing mold direction of the opening and closing mold mechanism, so that the vertical opening and closing mold of the top mold is realized, the phenomenon that the top mold is difficult to open is avoided, and the top mold can be accurately closed on the bottom mold.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of disc injection molding machine, in particular to a vertical opening and closing mold disc injection molding machine and a vertical opening and closing mold method. BACKGROUND

[0002] The disc injection machine is a plastic injection molding machine for producing plastic products. Since the disc injection machine has multiple stations, the production efficiency is relatively high. When used in larger product equipment, the product is larger, the mold is larger, and the required disc diameter is also larger. After casting and installation of the large-diameter disc, there is a certain amount of unavoidable deformation, which causes the mold to be slightly out of level on the disc. The mold positioning pin and the pin sleeve need to be installed between the upper and lower molds to ensure that the mold cavity is not misaligned when the upper and lower molds are closed. Due to the precision requirements of the product, the gap between the mold positioning pin and the pin sleeve is relatively small. This is especially true during the opening and closing of the mold cylinder to open the upper mold. The mold cavity needs to be ensured not to be misaligned when the mold is closed. If misalignment occurs, it may be difficult to open the upper mold.

[0003] Therefore, a disc injection molding machine capable of vertical opening and closing mold needs to be designed. SUMMARY

[0004] To overcome the deficiencies in the prior art, the present application provides a disc injection molding machine with vertical opening and closing mold and a vertical opening and closing mold method.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a disc injection molding machine with vertical opening and closing mold, comprising a disc, a mold mounting plate, a top mold, and a bottom mold, the mold mounting plate is placed on the disc, the bottom mold is fixed on the mold mounting plate, the top mold is provided with an extension plate protruding outward on both sides, further comprising a leveling mechanism, a force bearing mechanism, an opening and closing mold mechanism, and a fixed guide plate, the fixed guide plate is below the disc;

[0006] The leveling mechanism comprises a first driving member and a balance plate, the first driving member is vertically arranged on the fixed guide plate and is used to drive the balance plate to move up and down parallel to the fixed guide plate, the first driving member can drive the balance plate to lift the mold mounting plate upward so that it separates from the disc and is arranged in close contact with the balance plate;

[0007] The force bearing mechanism comprises a second driving member and a limiting column, the lower end of the mold mounting plate is provided with a positioning block protruding downward, the second driving member is drivingly connected with the limiting column and is arranged on the side surface of the balance plate, the second driving member is used to drive the limiting column to extend and retract towards the positioning block, in the state that the balance plate lifts the mold mounting plate upward, the second driving member can drive the limiting column to be inserted into the positioning block and position the mold mounting plate on the balance plate;

[0008] The mold opening and closing mechanism comprises a third driving member, a guide assembly, and a cover plate, the third driving member is arranged below the fixed guide plate and is connected with the cover plate through the guide assembly, and the third driving member is used to drive the cover plate to move up and down along the fixed guide plate and change the mold opening and closing state of the top die.

[0009] Further, the guide assembly comprises a lower fixed plate, a movable guide plate, a first connecting rod group, a second connecting rod group, and a movable mounting plate, the lower fixed plate is arranged in parallel below the fixed guide plate, the movable guide plate is arranged in parallel between the lower fixed plate and the fixed guide plate, the first connecting rod group connects the fixed guide plate and the lower fixed plate and is arranged through the movable guide plate, the movable mounting plate is arranged at the front end of the third driving member, the second connecting rod group connects the movable mounting plate and the movable guide plate, and the third driving member is used to drive the movable mounting plate to drive the movable guide plate to move up and down.

[0010] Further, the guide assembly further comprises a cover plate connecting rod group, the cover plate connecting rod group is arranged on both sides of the movable guide plate and is arranged upward through the fixed guide plate, the upper ends of the cover plate connecting rod groups on both sides are connected with a cover plate respectively, and the third driving member drives the movable guide plate to drive the cover plate connecting rod group to cooperate with the extension plate and is used for mold opening and closing action.

[0011] Further, it further comprises a fixed mounting plate and a third connecting rod group, the fixed mounting plate is arranged on the third driving member, and the upper end of the third connecting rod group is connected with the fixed mounting plate and is connected with the lower fixed plate downward through the movable guide plate.

[0012] Further, the force bearing mechanism further comprises a support seat, the support seat is fixedly arranged on the side surface of the balance plate, a support position for arranging the second driving member is formed between the balance plate and the inside of the support seat, a through hole for the limiting column to pass through is formed on the support seat, the second driving member drives the limiting column to move up and down along the axis direction of the through hole, and the limiting column can be arranged in the through hole in a retractable manner; a positioning hole is arranged on the positioning block, the through hole and the positioning hole are coaxially arranged in the state that the balance plate upwardly lifts the mold mounting plate, and the limiting column can be arranged in the positioning hole.

[0013] Further, the leveling mechanism further comprises balance guide rods and balance limiting blocks, the balance guide rods are arranged in four groups and are arranged in a rectangular shape, the balance guide rods pass through the fixed guide plate and are connected to the balance plate at the upper ends, the balance limiting blocks are arranged at the lower ends of the balance guide rods and below the fixed guide plate, and the balance plate can move up and down along the balance guide rods.

[0014] Further, the first and second position giving holes for the front end of the third driving member to pass through are arranged on the fixed guide plate and the balance plate.

[0015] Further, the disc is provided with a plurality of working positions, the working positions are arranged through the disc, the mold mounting plate is arranged on the working position, the fixed guide plate is arranged below the working position, the leveling mechanism, the locking assembly and the mold opening assembly are arranged below the working position.

[0016] Further, a plurality of sets of anti-falling safety devices are further included, the anti-falling safety devices are fixedly arranged below the fixed guide plate, the anti-falling safety devices include a fourth driving member and a safety rod, the fourth driving member is used for driving the safety rod to be arranged in an extension and retraction mode towards the guide assembly, in the state that the movable guide plate is upwardly moved and the top die is opened, the fourth driving member drives the safety rod to extend below the movable guide plate.

[0017] A vertical mold opening and closing method, characterized in that, comprising:

[0018] Step one, in the state that the top die is closed to the bottom die, the first driving member is started, the first driving member drives the balancing plate to be upwardly moved in parallel to the fixed guide plate, and the mold mounting plate is upwardly lifted to a height position of 5-7mm from the surface of the disc through the balancing plate;

[0019] Step two, the lower surface of the mold mounting plate is arranged in abutment with the balancing plate, and the limiting column is coaxially arranged with the positioning hole on the positioning block, the second driving member is started, the second driving member drives the limiting column to extend towards the positioning hole and is inserted into the positioning hole, so that the mold mounting plate is positioned on the balancing plate and is arranged in parallel to the fixed guide plate;

[0020] Step three, the third driving member is started, the third driving member drives the cover plate to be upwardly moved through the guide assembly, so that the cover plate is moved to be vertically contacted with the extension plate and is continuously lifted upwardly, in the state that the mold mounting plate supports the positioning of the bottom die, the top die and the bottom die are separated upwardly, and the mold opening action is completed;

[0021] Step four, the third driving member is started, the third driving member drives the cover plate to hold the top die and move downwardly to be closed to the bottom die, and the mold closing action is completed;

[0022] Step five, the second driving member is started, the limiting column is retracted, the balancing plate and the mold mounting plate are released from the positioning and abutment state, the first driving member is started, the balancing plate is downwardly moved, the mold mounting plate is reset to the surface of the disc, and the balancing plate is downwardly moved and reset to the initial position.

[0023] From the above description of the present application, compared with the prior art, the disc type injection molding machine provided by the present application has the following advantages:

[0024] The die mounting plate is carried by the bottom die and kept adhered to the balance plate by driving the balance plate upward to lift the die mounting plate, and the die mounting plate is positioned on the balance plate by the force bearing mechanism, since the balance plate is arranged in parallel with the fixed guide plate, the die mounting plate can also be arranged in parallel with the fixed guide plate along with the balance plate, and the opening and closing mechanism drives the cover plate to vertically top the fixed guide plate upward to complete the opening and closing die action, so that the opening and closing mechanism can realize the opening and closing die action in the vertical die top state, and the situation that the die is difficult to open is avoided, and the die can be accurately closed on the bottom die;

[0025] The guide assembly is arranged to avoid the mutual influence of the first driving member and the third driving member during the driving process.

[0026] The balance plate can position the die mounting plate when lifting the die mounting plate through the telescopic arrangement of the force bearing mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a front view schematic diagram of the disc type injection molding machine of the vertical opening and closing die.

[0028] Figure 2 It is a front view schematic diagram of the disc type injection molding machine of the vertical opening and closing die.

[0029] Figure 3 It is a side view schematic diagram of the leveling mechanism, the force bearing mechanism and the opening and closing mechanism.

[0030] Figure 4 It is a front view schematic diagram of the leveling mechanism, the force bearing mechanism and the opening and closing mechanism.

[0031] Figure 5 It is a schematic diagram of the die mounting plate state of the leveling mechanism.

[0032] Figure 6 It is a schematic diagram of the leveling mechanism.

[0033] Figure 7 It is a schematic diagram of the leveling mechanism. Figure 3 It is an enlarged schematic diagram of the structure at A in the application.

[0034] Figure 8 It is an enlarged schematic diagram of the structure at B in the application. Figure 4 It is an enlarged schematic diagram of the structure at B in the application.

[0035] Figure 9 It is an enlarged schematic diagram of the structure at C in the application. Figure 1 It is an enlarged schematic diagram of the structure at C in the application.

[0036] The corresponding marks in the figure are as follows: 1, disc; 11, injection mechanism; 12, working position; 2, mold mounting plate; 21, bottom mold; 211, positioning block; 212, positioning hole; 22, top mold; 221, extension plate; 3, fixed guide plate; 31, first let go hole; 4, leveling mechanism; 41, first driving piece; 42, balance plate; 43, balance guide rod; 44, balance limiting block; 421, second let go hole; 5, force bearing mechanism; 51, second driving piece; 52, limiting column; 53, support seat; 6, mold opening and closing mechanism; 61, third driving piece; 62, guide assembly; 621, lower fixed plate; 622, movable guide plate; 623, first connecting rod group; 624, second connecting rod group; 625, third connecting rod group; 626, movable mounting plate; 627, fixed mounting plate; 628, cover opening connecting rod group; 63, cover plate; 7, anti-falling safety device; 71, fourth driving piece; 72, safety rod. DETAILED DESCRIPTION

[0037] The application is further described below through a specific embodiment.

[0038] REFERENCE Figures 1 to 9 A vertical mold opening and closing disc type injection molding machine and a vertical mold opening and closing method are shown, comprising a disc 1, a mold mounting plate 2, a bottom mold 21, a top mold 22, a fixed guide plate 3, a leveling mechanism 4, a force bearing mechanism 5, and a mold opening and closing mechanism 6.

[0039] The disc 1 belongs to one part of the disc type injection molding machine, and the disc type injection molding machine further comprises an injection mechanism 11 for injecting into the mold cavity formed by the bottom mold 21 and the top mold 22. The disc 1 of the disc type injection molding machine is rotatably arranged, and a plurality of working positions 12 are arranged through the disc 1. The mold mounting plate 2 is placed on the working position 12 and can be changed between the state of being separated from the working position 12 and the state of being placed on the working position 12 by the leveling mechanism 4. The bottom mold 21 is fixedly arranged on the mold mounting plate 2, and the top mold 22 is placed on the bottom mold 21 and can be opened and closed up and down. The extension plates 221 are arranged on the two sides of the top mold 22 and protrude outward, and are used to cooperate with the mold opening and closing mechanism 6 to complete the mold opening and closing action. The leveling mechanism 4, the force bearing mechanism 5, and the mold opening and closing mechanism 6 are all below the working position 12, and the fixed guide plate 3 is also below the working position 12.

[0040] The leveling mechanism 4 comprises a first driving member 41 and a balance plate 42, the first driving member 41 is vertically arranged on the fixed guide plate 3 and used to drive the balance plate 42 to move up and down parallel to the fixed guide plate 3, the first driving member 41 can drive the balance plate 42 to lift up the mold mounting plate 2 to make it upwardly separate from the disc 1 and be arranged in close contact with the balance plate 42; the first driving member 41 is provided with two groups and is connected with the balance plate 42, the balance plate 42 is driven by the two first driving members 41 to lift up the mold mounting plate 2, so that the mold mounting plate 2 is arranged in close contact with the balance plate 42, since the balance plate 42 is arranged in parallel with the fixed guide plate 3, when the mold mounting plate 2 is arranged in close contact with the balance plate 42, the mold mounting plate 2 is also arranged in parallel with the fixed guide plate 3, so that the process of lifting up the mold mounting plate 2 by the balance plate 42 makes the mold mounting plate 2 self-adaptively leveled with the balance plate 42, and ensures that the mold mounting plate 2 can be arranged in parallel with the opening and closing mold mechanism 6 in the state of bearing the bottom die 21 and the top die 22, so as to realize the purpose of vertically opening and closing the mold.

[0041] The leveling mechanism 4 further comprises a balance guide rod 43 and a balance limiting block 44, the balance guide rod 43 is provided with four groups and arranged in a rectangular array, the balance guide rod 43 penetrates through the fixed guide plate 3 and the upper end of the balance guide rod 43 is connected to the balance plate 42, the balance limiting block 44 is arranged at the lower end of the balance guide rod 43 and below the fixed guide plate 3, and the balance plate 42 can move up and down along the balance guide rod 43. The balance plate 42 can move up and down along the balance guide rod 43 parallel to the fixed guide plate 3, and the balance limiting block 44 is used to limit the up and down movement range of the balance plate 42, further ensuring the balance stability of the balance plate 42.

[0042] The force bearing mechanism 5 comprises a second driving member 51 and a limiting column 52. The lower end of the mold mounting plate 2 is provided with a positioning block 211 protruding downward. The second driving member 51 is drivingly connected with the limiting column 52 and is arranged on the side surface of the balancing plate 42. The second driving member 51 is used to drive the limiting column 52 to extend and retract towards the positioning block 211. When the balancing plate 42 is used to lift the mold mounting plate 2 upward, the second driving member 51 can drive the limiting column 52 to be inserted into the positioning block 211 and position the mold mounting plate 2 on the balancing plate 42. The force bearing mechanism 5 further comprises a support seat 53. The support seat 53 is fixedly arranged on the side surface of the balancing plate 42. A support position for arranging the second driving member 51 is formed between the balancing plate 42 and the inside of the support seat 53. The support seat 53 is provided with a through hole through which the limiting column 52 passes. The second driving member 51 drives the limiting column 52 to extend and retract along the axis direction of the through hole, and the limiting column 52 can be retracted into the through hole. The positioning block 211 is provided with a positioning hole 212. When the balancing plate 42 is used to lift the mold mounting plate 2 upward, the through hole and the positioning hole 212 are coaxially arranged, and the limiting column 52 can be inserted into the positioning hole 212. The force bearing mechanism 5 is arranged in four groups and is arranged on the front, rear, left and right sides of the balancing plate 42. The positioning block 211 is also arranged in four groups. When the balancing plate 42 is attached to the mold mounting plate 2, one force bearing mechanism 5 corresponds to one positioning block 211. The extension and retraction of the force bearing mechanism 5 can position the mold mounting plate 2 at four corners when the balancing plate 42 is used to lift the mold mounting plate 2, so as to ensure that the bottom mold 21 is positioned during the opening of the mold.

[0043] The mold opening and closing mechanism 6 comprises a third driving member 61, a guide assembly 62 and an uncovering plate 63. The third driving member 61 is vertically arranged below the fixed guide plate 3 and is connected with the uncovering plate 63 through the guide assembly 62. The third driving member 61 is used to drive the uncovering plate 63 to move up and down along the fixed guide plate 3 and change the opening and closing state of the top mold 22. The guide assembly 62 is arranged in parallel with the fixed guide plate 3. The third driving member 61 is fixedly arranged and vertically drives the uncovering plate 63 to move up and down along the fixed guide plate 3, so that the uncovering plate 63 can complete the vertical opening and closing action of the top mold 22 when the mold mounting plate 2 is lifted and positioned by the balancing plate 42.

[0044] The guiding assembly 62 comprises a lower fixed plate 621, a movable guiding plate 622, a first connecting rod group 623, a second connecting rod group 624, a movable mounting plate 626, the lower fixed plate 621 is arranged below the fixed guiding plate 3 in parallel, the movable guiding plate 622 is arranged between the lower fixed plate 621 and the fixed guiding plate 3 in parallel, the first connecting rod group 623 is connected with the fixed guiding plate 3 and the lower fixed plate 621 and passes through the movable guiding plate 622, the movable mounting plate 626 is arranged at the front end of the third driving member 61, the second connecting rod group 624 is connected with the movable mounting plate 626 and the movable guiding plate 622, and the third driving member 61 is used to drive the movable mounting plate 626 to drive the movable guiding plate 622 to move up and down. The lower fixed plate 621 is fixedly arranged and used to mount the third driving member 61, the first connecting rod group 623 comprises a plurality of first connecting rods and is arranged in two groups which are symmetrically distributed on both sides, the upper and lower ends of the first connecting rod group 623 are fixedly connected with the fixed guiding plate 3 and the lower fixed plate 621 respectively, the first connecting rod group 623 can guide the up and down movement of the movable guiding plate 622, so that the movable guiding plate 622 can move up and down in parallel with the fixed guiding plate 3, the second connecting rod group 624 is formed by four second connecting rods and arranged in a rectangular structure, the movable mounting plate 626 and the movable guiding plate 622 are connected through the second connecting rod group 624, so that the third driving member 61 drives the movable mounting plate 626 to drive the movable guiding plate 622 to move up and down. The guiding assembly 62 is used to ensure that the uncovering plate 63 can move up and down vertically along the direction perpendicular to the fixed guiding plate 3, and due to the layout of the first driving member 41 and the third driving member 61, the guiding assembly 62 is arranged to avoid the mutual influence of the first driving member 41 and the third driving member 61 during driving.

[0045] The guiding assembly 62 further comprises a fixed mounting plate 627 and a third connecting rod group 625, the fixed mounting plate 627 is arranged on the third driving member 61, and the upper end of the third connecting rod group 625 is connected with the fixed mounting plate 627 and connected with the lower fixed plate 621 downward through the movable guiding plate 622. The fixed mounting plate 627 is fixedly connected with the lower fixed plate 621 through the third connecting rod group 625, so as to fix the mounting position of the third driving member 61 and play a reinforcing role.

[0046] The guiding assembly 62 further comprises a cover opening connecting rod set 628, which is arranged on both sides of the movable guiding plate 622 and passes through the fixed guiding plate 3 upwardly, and the upper ends of the cover opening connecting rod sets 628 on both sides are connected with a cover opening plate 63 respectively, and the third driving member 61 drives the movable guiding plate 622 to drive the cover opening connecting rod set 628 to cooperate with the extension plate 221 and is used for opening and closing mold action. The cover opening connecting rod set 628 is composed of three cover opening rods, and two sets of cover opening rods are arranged on both sides. The lower surface of the cover opening plate 63 is fixedly connected to the upper ends of the three cover opening rods on one side, and the lower ends of the cover opening rods are fixedly connected with the movable guiding plate 622. The working position of the cover opening plate 63 is changed through the up-down movement of the movable guiding plate 622, so as to realize the opening and closing mold action.

[0047] The fixed guiding plate 3 and the balance plate 42 are provided with first and second displacement holes 31 and 421 for the third driving member 61 to pass through. Since the stroke of the third driving member 61 is large, the first and second displacement holes 31 and 421 are arranged to enable the upper end of the third driving member 61 to pass through the second displacement hole 421, so as to avoid insufficient stroke or impact.

[0048] Further comprising a plurality of sets of anti-falling safety devices 7, which are fixedly arranged below the fixed guiding plate 3. The anti-falling safety device 7 comprises a fourth driving member 71 and a safety rod 72. The fourth driving member 71 is used to drive the safety rod 72 to extend and retract towards the guiding assembly 62. When the movable guiding plate 622 moves upwardly and opens the top die 22, the fourth driving member 71 drives the safety rod 72 to extend below the movable guiding plate 622. In the event of sudden unloading of the third driving member 61, the movable guiding plate 622 may fall downwardly with the mold. Therefore, the safety rod 72 can protect the mold in this case. Even if the third driving member 61 is damaged or unloads, the safety rod 72 can also support and protect the mold upwardly, thereby improving the safety performance.

[0049] The first driving member 41 and the third driving member 61 are oil cylinders, the second driving member 51 is a gas cylinder, the first driving member 41 is provided with two sets, the third driving member 61 is provided with one set, and the second driving member 51 is provided with four sets.

[0050] The working principle of the vertical opening and closing mold disc type injection molding machine is as follows:

[0051] Step one, the top die 22 is in the closing mold state on the bottom die 21, the first driving member 41 is started, the first driving member 41 drives the balance plate 42 to move upwardly parallel to the fixed guiding plate 3, and the mold mounting plate 2 is lifted upwardly to a height position of 5-7mm from the surface of the disc 1 through the balance plate 42;

[0052] Step two, the lower surface of the mold mounting plate 2 is attached to the balance plate 42, and the limiting column 52 is coaxially arranged with the positioning hole 212 on the positioning block 211, the second driving part 51 is started, the second driving part 51 drives the limiting column 52 to extend to the direction of the positioning hole 212 and is inserted into the positioning hole 212, the mold mounting plate 2 is positioned on the balance plate 42 and is arranged in parallel with the fixed guide plate 3, the mold mounting plate 2 is adjusted to be parallel to the fixed guide plate 3;

[0053] Step three, the third driving part 61 is started, the third driving part 61 drives the movable guide plate 622 through the guide assembly 62 to drive the cover plate 63 to move upwards, the cover plate 63 is moved to be vertically contacted with the extension plate 221 and continues to be lifted upwards, in the state that the mold mounting plate 2 bears the bottom die 21, the top die 22 is separated from the bottom die 21 upwards, the vertical mold opening action is completed;

[0054] Step four, the third driving part 61 is started, the third driving part 61 drives the movable guide plate 622 to drive the cover plate 63 to lift the top die 22 to move downwards to close on the bottom die 21, the vertical mold closing action is completed;

[0055] Step five, the second driving part 51 is started, the limiting column 52 is retracted, the balance plate 42 and the mold mounting plate 2 are released from the positioning state, the first driving part 41 is started, the balance plate 42 is driven to move downwards to reset the mold mounting plate 2 to the surface of the disc 1, and the balance plate 42 is moved downwards to reset to the initial position.

[0056] The above is only one specific embodiment of the present application, but the design concept of the present application is not limited to this, any non-essential change of the present application by using the concept should belong to the behavior of infringing the protection range of the present application.

Claims

1. A disc-type injection molding machine with vertically opening and closing mold, comprising a disc, a mold mounting plate, a top mold, and a bottom mold, wherein the mold mounting plate is placed on the disc, the bottom mold is fixedly mounted on the mold mounting plate, the top mold is vertically opening and closing mounted on the bottom mold, and extension plates protruding outwards are provided on both sides of the top mold, characterized in that: It also includes a leveling mechanism, a load-bearing mechanism, a mold opening and closing mechanism, and a fixed guide plate, which is located below the disc; The leveling mechanism includes a first driving component and a balance plate. The first driving component is vertically mounted on the fixed guide plate and is used to drive the balance plate to move up and down parallel to the fixed guide plate. The first driving component can drive the balance plate to lift the mold mounting plate upward so that it is separated from the disc and fits against the balance plate. The load-bearing mechanism includes a second driving component and a limiting post. The lower end of the mold mounting plate is provided with a downwardly protruding positioning block. The second driving component is driven to connect with the limiting post and is located on the side of the balance plate. The second driving component is used to drive the limiting post to extend and retract towards the positioning block. When the balance plate is in the state of lifting the mold mounting plate upward, the second driving component can drive the limiting post to be inserted into the positioning block and position the mold mounting plate on the balance plate. The mold opening and closing mechanism includes a third driving component, a guide assembly, and a cover plate. The third driving component is located below the fixed guide plate and is connected to the cover plate through the guide assembly. The third driving component is used to drive the cover plate to move up and down along the fixed guide plate and change the opening and closing state of the top mold. The load-bearing mechanism also includes a support base, which is fixedly mounted on the side of the balance plate. A support position for installing a second driving component is formed between the balance plate and the support base. The support base has a through hole for a limiting post to pass through. The second driving component drives the limiting post to extend and retract along the axis of the through hole, and the limiting post can retract into the through hole. The positioning block has a positioning hole. When the balance plate is in the state of lifting the mold mounting plate upward, the through hole and the positioning hole are coaxially arranged, and the limiting post can be inserted into the positioning hole. The leveling mechanism also includes balance guide rods and balance limiting blocks. There are four sets of balance guide rods arranged in a rectangular pattern. The balance guide rods pass through the fixed guide plate and the upper end of the balance guide rods is connected to the balance plate. The balance limiting blocks are located at the lower end of the balance guide rods and below the fixed guide plate. The balance plate can move up and down along the two balance guide rods.

2. The disc-type injection molding machine with vertical opening and closing mold according to claim 1, characterized in that: The guide assembly includes a lower fixed plate, a movable guide plate, a first connecting rod group, a second connecting rod group, and a movable mounting plate. The lower fixed plate is disposed parallel to the lower fixed guide plate, and the movable guide plate is disposed parallel to the lower fixed plate and the fixed guide plate. The first connecting rod group connects the fixed guide plate and the lower fixed plate and passes through the movable guide plate. The movable mounting plate is disposed at the front end of the third driving member. The second connecting rod group connects the movable mounting plate and the movable guide plate. The third driving member is used to drive the movable mounting plate to move the movable guide plate up and down.

3. The disc-type injection molding machine with vertical opening and closing mold according to claim 2, characterized in that: The guide assembly also includes a cover opening connecting rod group, which is located on both sides of the movable guide plate and passes upward through the fixed guide plate. The upper ends of the cover opening connecting rod groups on both sides are respectively connected to the cover opening plate. The third driving member drives the movable guide plate to move the cover opening connecting rod group to cooperate with the extension plate and to be used for mold opening and closing actions.

4. A disc-type injection molding machine with vertical opening and closing mold according to claim 2, characterized in that: It also includes a fixed mounting plate and a third connecting rod assembly. The fixed mounting plate is mounted on the third driving component, and the upper end of the third connecting rod assembly is connected to the fixed mounting plate and passes downward through the movable guide plate to connect with the lower fixed plate.

5. A disc-type injection molding machine with vertical opening and closing mold according to claim 1, characterized in that: The fixed guide plate and the balance plate are provided with a first clearance hole and a second clearance hole for the front end of the third driving component to pass through.

6. A disc-type injection molding machine with vertical opening and closing mold according to claim 1, characterized in that: The disc has several working positions, which are arranged through the disc. The mold mounting plate is placed on the working position, the fixed guide plate is located below the working position, and the leveling mechanism, locking assembly, and mold opening assembly are located below the working position.

7. A disc-type injection molding machine with vertical opening and closing mold according to claim 2, characterized in that: It also includes several sets of fall protection safety devices, which are fixedly installed below the fixed guide plate. Each fall protection safety device includes a fourth driving component and a safety rod. The fourth driving component is used to drive the safety rod to extend and retract toward the guide assembly. When the movable guide plate moves upward and the top mold is opened, the fourth driving component drives the safety rod to extend below the movable guide plate.

8. A vertical mold opening and closing method, characterized in that, A disc-type injection molding machine with vertical mold opening and closing according to any one of claims 1-7 includes: Step 1: With the top mold in the closed mold and bottom mold state, start the first drive component to drive the balance plate to move upward parallel to the fixed guide plate, and lift the mold mounting plate upward to a height of 5~7mm from the surface of the disc through the balance plate. Step 2: The lower surface of the mold mounting plate is fitted with the balance plate, and the limiting post and the positioning hole on the positioning block are set on the same axis. The second driving component is activated to drive the limiting post to extend towards the positioning hole and insert it into the positioning hole, so that the mold mounting plate is positioned on the balance plate and kept parallel to the fixed guide plate. Step 3: Activate the third drive component, which drives the cover plate upward through the guide assembly. The cover plate moves to a state of perpendicular contact with the extension plate and continues to be pushed upward. Under the condition that the mold mounting plate supports the bottom mold positioning, the top mold separates from the bottom mold upward, completing the mold opening action. Step 4: Activate the third drive unit to drive the cover plate to lift the top mold downwards until it closes on the bottom mold, thus completing the mold closing action. Step 5: Activate the second drive component to retract the limit post, thereby releasing the balance plate from its positioning and attachment state with the mold mounting plate. Activate the first drive component to move the balance plate downwards until the mold mounting plate is reset to the surface of the disc, and then move the balance plate downwards to reset to its initial position.

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