Vertical injection molding machine

Abstract

The invention discloses a vertical injection molding machine which comprises a rack, a lower table plate is erected on the front half portion of the rack, a rotary disc is installed on the lower table plate, the lower table plate comprises a first installation part and a first supporting part, an upper table plate is erected above the first supporting part, a mold locking cylinder and a glue injection mechanism are arranged above the upper table plate, and an auxiliary mold opening assembly is arranged below the two upper table plates. The two auxiliary mold opening assemblies are installed on the first supporting part, the lower table plate and the upper table plate are each of a multi-dimensional structural design, the thickness of the first supporting part is larger than that of the first installation part, a third installation part is arranged on the upper table plate, a second installation groove is formed in the third installation part, an avoiding hole is formed in the second installation groove, and the avoiding hole is of an eccentric rectangular kidney-shaped hole structure. The mold locking mechanism has the beneficial effects that through the multi-dimensional structural design of the lower table plate and the upper table plate, the whole machine is light, the overload resistance of mold locking force can be enhanced, the injection molding stability and injection molding safety are guaranteed, and the injection molding quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding machines, in particular to a vertical injection molding machine. Background Art

[0002] Injection molding machines, also known as plastic injection molding machines or plastic injection machines, are the primary molding equipment used to create various shapes of plastic products from thermoplastics or thermosetting materials using plastic molding molds. They are available in vertical, horizontal, and all-electric models. They heat plastic and apply high pressure to the molten plastic, causing it to eject and fill the mold cavity. They are widely used in the production of plastic products.

[0003] The mold guide pins of existing vertical injection molding machines are typically arranged in a rectangular array at the four corners of the machine. The entire upper mold structure occupies a significant amount of space, resulting in a bulky overall structure, limited mold capacity, and relatively low material access safety. Furthermore, the upper and lower platens of existing injection molding machines are each thick, flat plates on both the top and bottom sides, making them heavy. This results in high mold opening and closing forces required during mold closing and locking. Furthermore, the injection mechanism is unstable, particularly during the final stage of injection, when the required injection force is extremely high. This often causes the injection mechanism to wobble or deflect, compromising product quality. Summary of the Invention

[0004] The object of the present invention is to provide a vertical injection molding machine to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a vertical injection molding machine, comprising a frame, a lower platen is mounted on the front half of the frame, a turntable is mounted on the lower platen, the lower platen comprises a first mounting portion and a first support portion which are arranged in half, the first support portion is located on the rear side of the first mounting portion, an upper platen is mounted above the first support portion, a locking cylinder and an injection mechanism are provided above the upper platen, two locking cylinders are symmetrically arranged on both sides of the injection mechanism, two auxiliary mold opening assemblies corresponding to the locking cylinders are provided below the upper platen, the two auxiliary mold opening assemblies are mounted on the first support portion, the lower platen and the upper platen both adopt a multi-dimensional structural design, four first guide columns are connected between the lower platen and the upper platen, the four first guide columns are arranged in an isosceles trapezoidal structure and are arranged along the semicircular edge of the turntable below the upper platen.

[0006] Further optimized, the bottom surface of the first mounting portion is provided with a plurality of first mounting grooves, wherein the plurality of first mounting grooves are respectively provided with ejection components and positioning components, and the thickness of the first supporting portion is greater than that of the first mounting portion;

[0007] A second support portion for mounting the injection mechanism is provided in the upper center of the upper platen. A third mounting portion for mounting the two clamping cylinders is provided on the upper platen. The third mounting portion is provided with a second mounting slot, and an eccentrically arranged avoidance hole with a rectangular waist hole structure is provided in the second mounting slot. Four second mounting portions for mounting the four first guide posts are provided around the periphery of the first support portion. Four fourth mounting portions for passing the four first guide posts are provided around the periphery of the upper platen. A first connecting portion is provided between the second support portion and the third and fourth mounting portions. A second connecting portion for connecting the two fourth mounting portions is provided on each of the front and rear sides of the second support portion. The second mounting slot and the eccentrically arranged avoidance hole ensure that the core shaft of the clamping cylinder is hollow when in the retracted state, making way for the auxiliary mold opening assembly and facilitating the lowering and maintenance of the upper platen.

[0008] Further optimization is provided in the middle upper part of the upper platen for mounting the injection mechanism, two third mounting parts and four fourth mounting parts are symmetrically arranged on both sides of the second supporting part, and two fourth mounting parts are symmetrically provided on the front and rear sides of each third mounting part, respectively. A first connecting part is provided between the second supporting part and the third and fourth mounting parts, and the first connecting part is in a rib-groove structure. The thickness of the fourth mounting part is greater than that of the third mounting part. A second connecting part for connecting the two fourth mounting parts is provided on each of the front and rear sides of the second supporting part, and the second connecting part is a vertical plate perpendicular to the upper side of the second supporting part. The multi-dimensional structural design of the upper platen is achieved through the structural differentiation design of the second supporting part, the third mounting part, the fourth mounting part, the first connecting part, and the second connecting part, thereby optimizing the structure of the upper platen, ensuring structural strength while reducing weight.

[0009] In a further optimization, the auxiliary mold opening assembly includes a quick cylinder vertically mounted on the lower platen, the upper piston rod end of the quick cylinder being connected to a push block, and a positioning pin mounted above the push block for insertion into the upper platen. The quick cylinder drives the push block to push up the upper platen, thereby assisting the clamping cylinder in quickly opening the mold.

[0010] Further optimization, the injection mechanism includes a shooting cylinder, a screw and a hopper, and two opposite sides of the shooting cylinder are respectively provided with a seat cylinder for driving the shooting cylinder to move up and down, and the top of the two seat cylinders is respectively connected to a shooting cylinder for driving the screw to move up and down, the screw is connected to a motor for driving its rotation, and the shooting cylinder is connected to four second guide pillars for guiding its up and down movement.

[0011] Further optimization is provided, wherein a positioning plate is connected between the lower portion of the four second guide pillars and the upper platen. The positioning plate and the upper platen are connected via a plurality of eccentric adjustment structures, one or two of which comprise an eccentric roller bearing mounted on the upper platen and an eccentric adjustment block mounted on the positioning platen. A rotating shaft is provided within the bearing hole of the eccentric roller bearing, and the eccentric adjustment block is sleeved on the rotating shaft. A nut is screwed onto the upper portion of the rotating shaft, and the nut partially sinks into the upper surface of the eccentric adjustment block. The eccentric adjustment structure is used to fine-tune the position of the positioning platen. The relative rotation of the eccentric roller bearing and the eccentric adjustment block allows for fine-tuning of the relative position of the positioning plate and the upper platen, thereby enabling fine-tuning and centering of the injection molding mechanism.

[0012] Further optimization, a seat plate is connected between the shooting cylinder and the second guide column, the seat cylinder and the shooting cylinder are both inverted, the piston rod of the seat cylinder is fixedly connected to the cylinder body of the shooting cylinder, and two opposite sides of the connecting piece of the motor and the screw are connected to a support plate, the support plate is sleeved on the second guide column, and the piston rod of the shooting cylinder passes through the support plate and is connected to the connecting piece of the motor and the screw.

[0013] Further optimization is carried out in that two cross beams are connected between the four first guide columns, the two cross beams are arranged front and back, a sliding guide block is connected between each of the four second guide columns and the cross beams close to them, and at least one mechanical lock is connected between each of the cross beams and the upper platform.

[0014] Further optimization, the mechanical lock includes a limit rod and a guide rail block, the limit rod is vertically installed on the upper platform, and a plurality of protrusions evenly spaced along the length direction of the limit rod are provided, and the two guide rail blocks are symmetrically arranged on both sides of the limit rod, and the end of the guide rail block away from the limit rod is fixed on the cross beam, and a locking cylinder is fixed between the two guide rail blocks, and a locking block is installed on the piston rod end of the locking cylinder, and the locking block can be clamped between the protrusions of the limit rod for locking the height position of the upper platform, and a limit block sleeved on the limit rod is connected to the bottom of the two guide rail blocks.

[0015] Further optimization is carried out in that guardrails are provided on both sides of the upper platen, an auxiliary oil tank is provided on the rear side of the clamping cylinder, the auxiliary oil tank is arranged at the rear corner of the guardrail, and the rear end of the frame exceeds the lower platen and forms an automated supporting part.

[0016] Beneficial effects:

[0017] The multi-dimensional structural design of the lower and upper plates enables directional optimization for loads in different directions, reduces material redundancy while ensuring strength, removes material from low-stress areas, and forms a lightweight, high-rigidity structure. The structure is reinforced in local stress concentration areas and thinned in other areas, achieving lightweighting of the entire vertical injection molding machine. Furthermore, the overload resistance of the clamping force is enhanced, ensuring injection stability and safety, and improving injection quality.

[0018] The four first guide pillars arranged in a trapezoidal pattern, and the lower and upper plates located only on one side of the turntable, achieve a large mold capacity and a wide discharge port, facilitating product unloading and improving safety. The upper mold is mounted on the upper platen, free from equipment limitations. Combined with the wide mold capacity created by the first guide pillars, injection molds of varying sizes can be installed. The injection mold is limited only by the volume of the product, significantly saving mold manufacturing costs.

[0019] The clamping cylinder, the second mounting slot, and the eccentrically arranged avoidance hole in the slot form a hollow core shaft of the clamping cylinder, which can match the auxiliary mold opening assembly, facilitate the lowering of the upper platen, prevent interference, and facilitate maintenance of structural components such as the injection mechanism and the clamping cylinder. The structural setting of the auxiliary mold opening assembly can achieve rapid mold opening, improve safety, and enhance the production efficiency of finished products.

[0020] By placing the entire injection mechanism on the positioning pad, which is connected to the upper platen through an eccentric adjustment structure, it is convenient to fine-tune the centering of the injection mechanism. The double eccentric structure design of the eccentric roller bearing, the rotating shaft and the eccentric adjustment block allows the displacement size and direction to be adjusted, thereby ensuring the centering accuracy of the injection mechanism. The structural setting of the support plate and the sliding guide block can improve the structural stability of the injection mechanism, ensure stable and accurate injection, and effectively improve the product molding quality and equipment service life. The mechanical lock structure can lock the upper platen when it is in a stationary state, further ensuring the stability of the upper platen when it is stationary and improving safety performance.

[0021] The vertical injection molding machine has a spacious rear automated assembly section, which can realize the installation of control systems, hydraulic systems and cooling systems. The auxiliary oil tank is set on the rear side of the clamping cylinder and is in a concealed position. It can not only ensure fast clamping response and stable clamping force, but also greatly beautify the structural layout and improve the aesthetics of the injection molding machine. The entire vertical injection molding machine has been optimized, with a small overall volume and low tonnage, stable mold clamping and injection molding, and high product molding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the axial structure of the vertical injection molding machine disclosed in an embodiment of the present invention;

[0023] Figure 2A schematic top view of the vertical injection molding machine disclosed in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the coordination structure of the lower platen, the turntable and the auxiliary mold opening assembly disclosed in an embodiment of the present invention;

[0025] Figure 4 This is a structural schematic diagram of the lower platform disclosed in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the axonometric structure of the upper platform disclosed in an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of the top structure of the upper platform disclosed in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the assembly structure of the structural components connected to the upper platform disclosed in an embodiment of the present invention;

[0029] Figure 8 This is a structural diagram of the injection mechanism disclosed in an embodiment of the present invention;

[0030] Figure 9 A schematic structural diagram of a mechanical lock disclosed in an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the assembly structure of the positioning pad and the eccentric adjustment structure disclosed in an embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of the exploded structure of the eccentric adjustment structure disclosed in an embodiment of the present invention.

[0033] Figure numbers: 1-frame, 2-lower plate, 21-first mounting portion, 211-first mounting groove, 22-first supporting portion, 23-second mounting portion, 231-first mounting hole, 3-turntable, 31-turntable, 32-gear, 33-motor, 4-first guide column, 5-upper plate, 51-second supporting portion, 52-first connecting portion, 53-third mounting portion, 531-second mounting groove, 532-avoidance hole, 54-fourth mounting portion, 541-second mounting hole, 55-second connecting portion, 6-clamping cylinder, 7-injection mechanism, 71-shooting cylinder, 7 2-screw, 73-hopper, 74-seat cylinder, 75-shooting cylinder, 76-motor, 77-second guide column, 78-seat plate, 79-support plate, 8-auxiliary mold opening assembly, 81-quick cylinder, 82-ejector block, 83-locating pin, 9-ejector assembly, 10-positioning assembly, 20-crossbeam, 30-positioning pad, 40-eccentric adjustment structure, 50-mechanical lock, 501-limit rod, 502-guide rail block, 503-locking cylinder, 504-locking block, 505-limit block, 60-sliding guide block, 70-auxiliary oil tank, 80-automation supporting department. DETAILED DESCRIPTION

[0034] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0035] like Figure 1 、 Figure 2 、 Figure 4 and Figure 6 As shown, a vertical injection molding machine includes a frame 1, a lower platen 2 is mounted on the front half of the frame 1, a turntable 3 is mounted on the lower platen 2, the lower platen 2 includes a first mounting portion 21 and a first support portion 22 arranged in half, the first support portion 22 is located on the rear side of the first mounting portion 21, an upper platen 5 is mounted above the first support portion 22, a clamping cylinder 6 and an injection mechanism 7 are provided above the upper platen 5, two clamping cylinders 6 are symmetrically arranged on both sides of the injection mechanism 7, two auxiliary mold opening assemblies 8 corresponding to the clamping cylinder 6 are provided below the upper platen 5, the two auxiliary mold opening assemblies 8 are mounted on the first support portion 22, both the lower platen 2 and the upper platen 5 adopt a multi-dimensional structural design, four first guide columns 4 are connected between the lower platen 2 and the upper platen 5, the four first guide columns 4 are arranged in an isosceles trapezoidal structure and are arranged along the semicircular edge of the turntable 3 below the upper platen 5.

[0036] In the present application, the lower platen 2 is used for the installation and support of the turntable 3 and the auxiliary mold opening assembly 8, the upper platen 5 is used for the installation of the clamping cylinder 6 and the injection mechanism 7, the turntable 3 is used for the installation of the lower mold, and the lower part of the upper platen 5 is used for the installation of the upper mold. The upper platen 5 is mounted on the lower platen 2, and the clamping cylinder 6 can drive the upper platen 5 to rise and fall, thereby driving the upper mold to descend and close the mold and close the mold with the lower mold on the turntable 3, and the injection mechanism 7 on the upper platen 5 is used to inject into the mold cavity after closing the mold, thereby realizing the injection molding of the product. At least two lower molds can be installed on the turntable 3, which can be rotated out from under the upper platen 5 after the injection molding of one lower mold is completed, and the other lower mold can enter under the upper platen 5 to continue the injection molding, thereby realizing sustainable processing of the product.

[0037] In the present application, both the lower platen 2 and the upper platen 5 adopt a multi-dimensional structural design, which can be directional optimized for loads in different directions (tension, compression, bending, shear, torsion, etc.). Through topological optimization structural design, material redundancy is reduced while ensuring strength, and materials in low stress areas are removed to form a lightweight and high-rigidity structure. The local stress concentration area is strengthened and other areas are thinned, that is, the thickness of the first support part 22 is greater than the first mounting part 21. The first support part 22 is a stress concentration area, which bears the force of the mold closing and the force of the upper platen 5, the locking cylinder 6 and the injection mechanism 7. Therefore, the thickness of the first support part 22 is greater than the first mounting part 21 which is only used for partial structural installation. The bottom of the first support portion 22 has four sides with different arcs, and the thickness increases as it approaches the center of the first support portion 22. The bottom of the first support portion 22 also adopts a convex arc structure design from the edge to the center. A plurality of grooves with different structures are opened at the bottom of the first support portion 22. Through topological optimization, redundant materials are removed, high stress areas are retained, and materials are sampled in non-critical areas. The different arcs and groove structures not only enhance the structural strength and overload resistance of the first support portion 22, but also suppress vibration and reduce noise. At the same time, it can reduce the weight of the first support portion 22. In combination with the thin thickness of the first mounting portion 21 to achieve the overall lightness, the lower platen 2 and the entire vertical injection molding machine are ultimately lightweight. The multi-dimensional structural design of the upper platen 5 not only ensures its structural strength, but also has strong overload resistance, suppressing the vibration and noise that may be generated when the clamping cylinder 6 and the injection mechanism 7 are working. At the same time, in combination with the first support portion 22 of the lower platen 2, it can strengthen the overload resistance of the clamping force, ensure the stability and safety of injection molding, and improve the injection quality.

[0038] In this application, the two clamping cylinders 6 are inverted, which can effectively reduce the overall height of the vertical injection molding machine, optimize the overall structure of the injection molding machine, and improve space utilization. This can further achieve the miniaturization of the overall volume of the injection molding machine and reduce the tonnage requirement, facilitate the transportation of the injection molding machine and reduce the floor space. It can also increase the clamping force and improve the clamping stability, reduce product injection defects, and significantly improve the quality of the injection molded products. The auxiliary mold opening assembly 8 is used to assist the mold opening action of the clamping cylinder 6, achieving rapid mold opening and effectively improving injection molding efficiency. The auxiliary mold opening assembly 8 is mounted on the first support portion 22 to ensure stable support for the auxiliary mold opening assembly 8.

[0039] In the present application, the first guide pillars 4 are used to guide the two clamping cylinders 6 and the connection structure of the clamping cylinders 6, as well as the upper platen 5. The four first guide pillars 4 are arranged in an isosceles trapezoidal structure, which not only ensures the support of the upper platen 5, but also is arranged along the semicircular edge of the turntable 3, which can make room for the other semicircle of the turntable 3, making it easier to remove the molded products, and is safer, more elegant and beautiful, while also facilitating the lowering and maintenance of the upper platen. The two first guide pillars 4 located on the front side form a large opening structure with a large mold capacity. At the same time, the four first guide pillars 4 arranged in an isosceles trapezoidal structure have higher support stability, can avoid tilting or instability caused by uneven force, and can withstand higher overload resistance. At the same time, it is possible to optimize space in a limited area while taking into account both functionality and aesthetics.

[0040] In the present application, the upper mold is installed below the upper platen 5. It can be designed according to the product volume and is not limited by the vertical injection molding machine, which can reduce the volume and cost of the molding mold.

[0041] Please refer to Figure 4-Figure 6 As shown, in one embodiment of the present application, a plurality of first mounting grooves 211 are provided on the bottom surface of the first mounting portion 21, and a plurality of first mounting grooves 211 are respectively provided with ejection assemblies 9 and positioning assemblies 10, and the thickness of the first supporting portion 22 is greater than that of the first mounting portion 21;

[0042] A second supporting portion 51 for installing the injection mechanism 7 is provided in the upper middle portion of the upper platen 5, a third mounting portion 53 for installing two clamping cylinders 6 is provided on the upper platen 5, a second mounting groove 531 is provided on the third mounting portion 53, and an eccentric avoidance hole 532 with a rectangular waist hole structure is provided in the second mounting groove 531. Four second mounting portions 23 for installing four first guide pillars 4 are provided around the first supporting portion 22, and four fourth mounting portions 54 for passing through the four first guide pillars 4 are provided around the upper platen 5. A first connecting portion 52 is provided between the second supporting portion 51 and the third mounting portion 53 and the fourth mounting portion 54, and a second connecting portion 55 for connecting the two fourth mounting portions 54 is provided on the front and rear sides of the second supporting portion 51.

[0043] In this embodiment, the first mounting groove 211 not only facilitates the installation of the ejection assembly 9 and the positioning assembly 10, but also facilitates the installation of the motor of the turntable 3. At the same time, it can effectively reduce the weight of the first mounting portion 21. Reinforcing ribs are formed between several first mounting grooves 211 to ensure the structural strength of the first mounting portion 21. This portion does not need to directly bear the load caused by mold closing and locking. Therefore, the thickness of this portion (i.e., the first mounting portion 21) is less than the thickness of the first support portion 22. In conjunction with the design of the groove and other structures of the first support portion 22, the structure of the lower platen 2 is optimized and the lower platen 2 is lightweight. The second mounting portion 23 is arranged around the first support portion 22, has a stronger structure, a larger contact surface with the first guide column 4, and a stronger support force and fixing performance for the first guide column 4, ensuring a more secure installation of the first guide column 4.

[0044] The ejection assembly 9 is used to unload the formed product, and the product can be ejected from the cavity of the lower mold through the ejection assembly 9. The positioning assembly 10 is used to position the rotation position of the turntable 3 to ensure the accurate position of the turntable 3 when it stops, and to ensure the accurate mold closing between the lower mold on the turntable 3 and the upper mold on the upper platen 5. Among them, the ejection assembly 9 and the positioning assembly 10 both include an oil cylinder or an electric cylinder that can move up and down and a push rod connected to the end thereof. The oil cylinder or electric cylinder drives the push rod to rise, and the push rod can penetrate into the cavity of the lower mold to eject the product. The oil cylinder or electric cylinder drives the push rod to rise, and the push rod can be inserted into the turntable 31 of the turntable 3 to achieve accurate positioning of the turntable 31.

[0045] In this embodiment, the second support portion 51 is used to mount the injection mechanism 7, the third mounting portion 53 is used to mount the clamping cylinder 6, and the fourth mounting portion 54 is provided for the passage of the first guide post 4. These portions are located around the upper platen 5, ensuring stability without interfering with the structural components mounted on the upper platen 5. The first connecting portion 51 connects the second support portion 51 with the third mounting portion 53 and the fourth mounting portion 54. This eliminates the need for mounting other structural components and, therefore, utilizes a rib-and-groove design, which not only ensures connection strength but also reduces the weight of the upper platen 5. The third mounting portion 53 is thicker than the fourth mounting portion 54, further enhancing the lifting and lowering stability of the upper platen 5 and indirectly improving molding quality. The second connecting portion 55 strengthens the connection between the second support portion 51 and the fourth mounting portion 54, increasing the structural strength of the fourth mounting portion 54 and also protecting the injection mechanism 7. The third mounting portion 53 is used to connect the clamping cylinder 6 with the upper platen 5, and an eccentrically arranged avoidance hole 532 with a rectangular waist hole structure is provided in the second mounting groove 531. The eccentric arrangement of the avoidance hole 532 and the structural arrangement of the second mounting groove 531 enable the core shaft of the clamping cylinder 6 to be in a hollow state, which can be connected with the auxiliary mold opening assembly 8. When it is necessary to maintain the various mechanisms and components on the upper platen 5, the upper platen 5 can be dropped, and the upper end of the auxiliary mold opening assembly 8 can be inserted into the avoidance hole 532, which will not interfere with the dropping of the upper platen 5, and is convenient for maintaining the various mechanisms and components on the upper platen 5. Specifically, the top block 82 and the positioning pin on the auxiliary mold opening assembly 8 are removed, and then the quick cylinder 81 is in a retracted state, and the upper end of the quick cylinder 81 enters the avoidance hole 532, which facilitates the complete dropping of the upper platen 5.

[0046] Based on the above embodiment, further, a second supporting portion 51 for installing the injection mechanism 7 is provided in the upper middle portion of the upper platen 5, two third mounting portions 53 and four fourth mounting portions 54 are symmetrically arranged on both sides of the second supporting portion 51, and two fourth mounting portions 54 are symmetrically provided on the front and rear sides of each third mounting portion 53. A first connecting portion 52 is provided between the second supporting portion 51 and the third mounting portion 53 and the fourth mounting portion 54. The first connecting portion 52 is a rib-groove structure, and the thickness of the fourth mounting portion 54 is greater than that of the third mounting portion 53. A second connecting portion 55 for connecting the two fourth mounting portions 54 is provided on the front and rear sides of the second supporting portion 51, and the second connecting portion 55 is a vertical plate perpendicular to the upper side of the second supporting portion 51.

[0047] The second support portion 51 is used to mount the injection molding mechanism 7, the third mounting portion 53 is used to mount the mold clamping cylinder 6, and the fourth mounting portion 54 is used to pass through the first guide pillar 4. The first connecting portion 51 is used to connect the second support portion 51 with the third mounting portion 53 and the fourth mounting portion 54. It does not require the installation of other structural components. Therefore, it adopts a rib-groove structure design, which not only ensures connection strength but also reduces the weight of the upper platen 5. The thickness of the third mounting portion 53 is greater than that of the fourth mounting portion 54, which further improves the lifting stability of the upper platen 5 and indirectly improves the molding quality. The second connecting portion 55 is used to strengthen the connection between the second support portion 51 and the fourth mounting portion 54, while also improving the structural strength of the fourth mounting portion 54 and protecting the injection molding mechanism 7. That is, through the structural design of the second support part 51, the third mounting part 53, the fourth mounting part 54, the first connecting part 52 and the second connecting part 55, the overall structure of the upper platform 5 is multidimensionalized. While ensuring the structural strength of the upper platform 5, its structure is optimized and lightweight, and at the same time its overload resistance is guaranteed, thereby ensuring the stability and safety of the injection molding.

[0048] Each second mounting portion 23 is provided with a first mounting hole 231 for mounting the first guide post 4. The second mounting portion 23 is disposed at the edge of the first support portion 22, thereby ensuring the structural strength of the second mounting portion 23 and the stability of the first guide post 4 mounted in the first mounting hole 231. Each fourth mounting portion 54 is provided with a second mounting hole 541 for the first guide post 4 to pass through, facilitating the raising and lowering of the upper platform 5 along the first guide post 4, ensuring accurate and smooth raising and lowering of the upper platform 5.

[0049] Please refer to Figure 3 As shown, in one embodiment of the present application, the auxiliary mold opening assembly 8 includes a quick cylinder 81 vertically installed on the lower platen 2, the upper piston rod end of the quick cylinder 81 is connected to a top block 82, and a positioning pin 83 for being inserted into the upper platen 5 is installed above the top block 82.

[0050] Among them, the quick cylinder 81 is used to drive the top block 82 to move up and down quickly, and the positioning pin 83 is used to connect and position the top block 82 with the upper platen 5. When the mold needs to be opened after the product injection is completed, the top block 82 is driven to rise by the quick cylinder 81. The top block 82 can lift the upper platen 5 upward to assist the clamping cylinder 6 in opening the mold, thereby realizing rapid mold opening, improving the injection molding efficiency of the product, and at the same time improving the safety performance of mold opening.

[0051] Please refer to Figure 8As shown, in one embodiment of the present application, the injection mechanism 7 includes a barrel 71, a screw 72 and a hopper 73. Two opposite sides of the barrel 71 are respectively provided with a seat cylinder 74 for driving the barrel 71 to move up and down. The upper part of the two seat cylinders 74 is respectively connected to a shooting cylinder 75 for driving the screw 72 to move up and down. The screw 72 is connected to a motor 76 for driving its rotation. The barrel 71 is connected to four second guide pillars 77 for guiding its up and down movement.

[0052] In this embodiment, the ejection barrel 71 is used to store the material, and the hopper 73 is used to input the material. The screw 72 is driven by a motor 76 to rotate, stirring, mixing, and pushing the material, and can push the molten material in the ejection barrel 71 into the mold cavity. The seat cylinder 74 can push the ejection barrel 71 up and down, connect the nozzle of the ejection barrel 71 with the injection port on the mold, and separate the nozzle from the injection port after the injection molding is completed. The ejection cylinder 75 is used to push the screw 72 up and down within the ejection barrel 71 to push the material in the ejection barrel 71. The second guide column 77 can assist the ejection barrel 71 and screw 72 in precise up and down movement, ensuring the injection accuracy and stability of the injection mechanism 7.

[0053] Please refer to Figure 8 and Figure 10 and Figure 11 As shown, based on the above embodiment, further, a positioning pad 30 is connected between the bottom of the four second guide columns 77 and the upper plate 5, and the positioning pad 30 is connected to the upper plate 5 through a plurality of eccentric adjustment structures 40. The number of eccentric adjustment structures 40 is one or two. The eccentric adjustment structure 40 includes an eccentric roller bearing 401 installed on the upper plate 5 and an eccentric adjustment block 403 installed on the positioning pad 30. A rotating shaft 402 is provided in the bearing hole of the eccentric roller bearing 401, and the eccentric adjustment block 403 is sleeved on the rotating shaft 402. A nut 404 is screwed on the upper side of the rotating shaft 402, and the nut 404 is partially sunk into the upper surface of the eccentric adjustment block 403.

[0054] The positioning plate 30 is used to connect the injection mechanism 7 to the upper platen 5. The entire structure of the injection mechanism 7 is first fixed to the positioning plate 30. The positioning plate 30 is then connected to the upper platen 5 via the eccentric adjustment structure 40. This facilitates installation and adjustment of the injection mechanism 7, ensuring installation accuracy and stability. Before adjusting the eccentric adjustment structure 40, the positioning plate 30 is initially bolted to the upper platen 5, but the bolts are not tightened. The bolts are then tightened after the eccentric adjustment structure 40 is centered. The eccentric adjustment structure 40 facilitates fine-tuning of the positioning plate 30. By rotating the eccentric adjustment structure 40, the positioning plate 30 can be fine-tuned, thereby adjusting the overall position of the injection mechanism 7, ensuring centering accuracy of the injection mechanism 7. The adjustment method is simple and convenient. The positioning plate 30 also absorbs reaction forces during mold closing, further improving the stability of the injection mechanism 7.

[0055] Specifically, the eccentric adjustment structure 40 includes an eccentric roller bearing 401, a rotating shaft 402, an eccentric adjustment block 403 and a nut 404. When the rotating shaft 402 rotates relative to the eccentric roller bearing 401, there is a position change between the rotating shaft 402 and the eccentric roller bearing 401. When the eccentric adjustment block 403 rotates relative to the rotating shaft 402, there is a position change between the eccentric adjustment block 403 and the rotating shaft 402, thereby realizing the position adjustment of the eccentric adjustment block 403 relative to the eccentric roller bearing 401, and finally realizing the position adjustment of the positioning pad 30 relative to the upper plate 5, that is, realizing the centering position adjustment of the injection molding mechanism 7 to ensure the centering accuracy.

[0056] Preferably, the number of the eccentric adjustment structures 40 is two, which can ensure the fixed stability of the positioning pad 30. At the same time, the rotation synchronization of the two eccentric adjustment structures 40 is good, which can ensure the rapid and smooth adjustment of the positioning pad 30, thereby achieving rapid and precise adjustment of the injection mechanism 7. Moreover, through the double eccentric structure design of the eccentric roller bearing 401, the rotating shaft 402 and the eccentric adjustment block 403, the displacement size and direction can be adjusted, and the adjustment distance can be enlarged by a small rotation, which can ensure that the position of the injection mechanism 7 is adjusted in place and the centering accuracy of the injection mechanism 7 is guaranteed.

[0057] Please continue to refer to Figure 8 As shown, based on the above embodiment, further, a seating plate 78 is connected between the shooting cylinder 71 and the second guide column 77, the seating cylinder 74 and the shooting cylinder 75 are both inverted, the piston rod of the seating cylinder 74 is fixedly connected to the cylinder body of the shooting cylinder 75, and a support plate 79 is connected to the two opposite sides of the connecting piece of the motor 76 and the screw rod 72. The support plate 79 is sleeved on the second guide column 77, and the piston rod of the shooting cylinder 75 passes through the support plate 79 and is connected to the connecting piece of the motor 76 and the screw rod 72.

[0058] Among them, the seat feed plate 78 is used to connect the shooting cylinder 71 and the second guide column 77, and is connected to the shooting cylinder 75. When the piston rod of the seat feed cylinder 74 performs telescopic movement, it can drive the shooting cylinder 75 to move up and down, and then can drive the seat feed plate 78, the shooting cylinder 71 and the screw 72 connected or indirectly connected to the shooting cylinder 75 to move up and down synchronously, ensuring the synchronization of the screw 72 and the shooting cylinder 71 before injection, and ensuring the normal storage of material in the shooting cylinder 71. The piston rod of the seat feed cylinder 74 and the cylinder body of the shooting cylinder 75 are welded, which has higher rigidity and can withstand high static or dynamic loads, reduce the risk of deformation and deflection during long-term use, and ensure the stability of the injection mechanism 7. The seat feed cylinder 74 and the shooting cylinder 75 are both inverted, which can effectively reduce the overall height of the injection mechanism 7, optimize the overall structure of the injection molding machine, and improve space utilization; it can also improve injection stability, reduce product injection defects, and significantly improve the quality of injection molded products. The support plate 79 is used to connect with the connecting parts of the motor 76 and the screw 72, and can drive the motor 76 and the screw 72 to move synchronously to achieve injection molding. It can also fix the screw 72 and the motor 76 during the injection molding process to prevent the screw 72 and the motor 76 from shaking or deflecting during the injection molding process. At the same time, it can absorb the reaction force of the screw 72 during the injection molding process and transfer it to the second guide column 77, reducing the force and shaking of the screw 72 and the motor 76, ensuring stable injection molding, improving injection molding and injection molding quality, and at the same time protecting the motor 76 to ensure the stability of the entire injection molding mechanism 7.

[0059] Please refer to Figure 1 、 Figure 7 and Figure 8 As shown, based on the above embodiment, further, two beams 20 are connected between the four first guide columns 4, and the two beams 20 are arranged front and back, and a sliding guide block 60 is connected between each of the four second guide columns 77 and the beams 20 close thereto, and at least one mechanical lock 50 is connected between each beam 20 and the upper platform 5.

[0060] The crossbeam 20 strengthens the installation stability of the first guide post 4, thereby improving the overall stability of the injection molding machine. The sliding guide block 60 connects the second guide post 77 to the crossbeam 20. The crossbeam 20 strengthens the stability of the second guide post 77 and improves the stability of the injection mechanism 7. As the injection mechanism 7 moves downward synchronously with the upper platen 5, and injection begins after mold closing and locking, the sliding guide block 60 moves upward relative to the second guide post 77 until it just contacts the seat plate 78 during the final injection. At this point, the sliding guide block 78 is located in the middle of the entire injection mechanism 7. It cooperates with the positioning pad 30 at the bottom of the injection mechanism 7 to form a two-point fixation, which can further prevent the shaking of the injection mechanism 7, improve the stability of the injection mechanism 7, enhance the injection precision and quality, and further improve the injection molding quality of the product. The mechanical lock 50 is used to lock the upper platen 5 in a stationary state, such as when repairing or changing the mold, or when the equipment is shut down. The mechanical lock 50 assists the clamping cylinder 6 in locking the upper platen 5 to prevent it from falling, thereby improving safety performance.

[0061] Please refer to Figure 9 As shown, in one embodiment of the present application, the mechanical lock 50 includes a limit rod 501 and a guide block 502. The limit rod 501 is vertically installed on the upper platform 5. A plurality of protrusions evenly spaced are provided along the length direction of the limit rod 501. The two guide rail blocks 502 are symmetrically arranged on both sides of the limit rod 501. The ends of the guide rail blocks 502 away from the limit rod 501 are fixed on the crossbeam 20. A locking cylinder 503 is fixed between the two guide rail blocks 502. A locking block 504 is installed at the piston rod end of the locking cylinder 503. The locking block 504 can be clamped between the protrusions of the limit rod 501 for locking the height position of the upper platform 5. A limit block 505 sleeved on the limit rod 501 is connected to the bottom of the two guide rail blocks 502.

[0062] In this embodiment, the lower end of the limit rod 501 is fixedly connected to the upper platform 5. The guide block 502 is used to install the locking cylinder 503 and guide and limit the sliding of the locking block 504. When the locking cylinder 503 drives the locking block 504 to slide along the guide block 502 toward the limit rod 501, it can be locked between the two protrusions on the limit rod 501, fixing the limit rod 501, thereby fixing the upper platform 5 connected to the limit rod 501, pulling the upper platform 5 and locking the upper platform 5. The limit block 505 is fixed below the guide block 502 and can limit the limit rod 501, preventing the limit rod 501 from tilting and causing the locking to fail. It can also cooperate with the locking block 504 to achieve a bidirectional locking effect, ensuring the secure locking of the limit rod 501. It can also be used to connect the ends of the two guide blocks 502 to ensure the installation stability of the guide blocks 502.

[0063] Please refer to Figure 1 and Figure 3 As shown, in one embodiment of the present application, guardrails 90 are provided on the left and right sides of the upper platen 5, and an auxiliary oil tank 70 is provided on the rear side of the clamping cylinder 6. The auxiliary oil tank 70 is arranged at the rear corner of the guardrail 90, and the rear end of the frame 1 extends beyond the lower platen 2 to form an automated supporting part 80.

[0064] Among them, the guardrail 90 is used to protect the various mechanisms and components on the upper platen 5, and at the same time has the effect of beautifying the equipment. The auxiliary oil tank 70 is set on the side of the clamping cylinder 6. The auxiliary oil tank 70 is used for oil storage. During the clamping process, the clamping cylinder 6 needs to output a large flow of hydraulic oil in a short time to drive the piston to move quickly. The main oil tank of the clamping cylinder 6 may cause oil pressure fluctuations due to excessive instantaneous flow demand. The auxiliary oil tank 70 can be used as a backup oil source to quickly replenish oil and avoid pressure drop caused by insufficient oil in the main oil tank, ensuring constant clamping force, preventing the injection mold from loosening or flashing due to pressure fluctuations, and improving product molding quality; it can significantly improve the system's oil supply capacity, and can quickly release oil, reduce the oil pump load, reduce hydraulic shock and mechanical vibration, extend system life, and at the same time improve the response speed of the clamping action. During the circulation process of hydraulic oil, the pressure difference caused by gravity is reduced, which can reduce the load pressure of the oil pump (reduce the driving power by about 10%-20%), thereby reducing energy consumption; it can ensure the smooth flow of oil and reduce the risk of cavitation; it can reduce the flow resistance and delay of oil, and shorten the response time of the clamping action by 15%-60%, achieving rapid response; it can improve the symmetry of the oil circuit, and the pressure fluctuation of the clamping cylinder 6 when the oil is in and out is smaller, avoiding the mold centering deviation caused by uneven oil distribution.

[0065] Preferably, the auxiliary fuel tank 70 is located at the corner of the guardrail 90, in a concealed position, appearing to be integrated with the guardrail 90, greatly optimizing the structural layout and enhancing the overall appearance of the vertical injection molding machine. The rear end of the frame 1 forms a spacious automation supporting section 80, which can be used for the installation of the automation control system, including the equipment's pressure supply device, electrical appliances, electrical boxes, cooling system, etc.

[0066] In other embodiments of the present application, the turntable 3 includes a turntable 31, a gear 32 and a motor 33. The motor 33 can drive the gear 32 to rotate, and the gear 32 drives the turntable 31 to rotate, thereby realizing the rotation of the turntable, and then realizing the conversion of the injection molding station and achieving continuous injection molding.

[0067] In other embodiments of the present application, the front side of the lower platform 2 has a double workbench, which is installed on the frame 1 for more convenient operation.

[0068] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A vertical injection molding machine, comprising a frame (1), characterized in that: A lower platen (2) is mounted on the front half of the frame (1), a turntable (3) is mounted on the lower platen (2), the lower platen (2) comprises a first mounting portion (21) and a first supporting portion (22) which are arranged in half, the first supporting portion (22) being located at the rear side of the first mounting portion (21), an upper platen (5) is mounted above the first supporting portion (22), a clamping cylinder (6) and an injection mechanism (7) are arranged above the upper platen (5), and two clamping cylinders (6) are symmetrically arranged on the sides of the injection mechanism (7). On both sides, two auxiliary mold opening assemblies (8) corresponding to the clamping cylinder (6) are provided below the upper platen (5), and the two auxiliary mold opening assemblies (8) are installed on the first support portion (22). The lower platen (2) and the upper platen (5) both adopt a multi-dimensional structural design. Four first guide columns (4) are connected between the lower platen (2) and the upper platen (5). The four first guide columns (4) are arranged in an isosceles trapezoidal structure and are arranged along the semicircular edge of the turntable (3) below the upper platen (5).

2. The vertical injection molding machine according to claim 1, characterized in that: The bottom surface of the first mounting portion (21) is provided with a plurality of first mounting grooves (211), and ejection assemblies (9) and positioning assemblies (10) are respectively provided in the plurality of first mounting grooves (211), and the thickness of the first supporting portion (22) is greater than that of the first mounting portion (21); A second supporting portion (51) for mounting the injection mechanism (7) is provided at the upper middle portion of the upper platen (5), a third mounting portion (53) for mounting the two clamping cylinders (6) is provided on the upper platen (5), a second mounting groove (531) is provided on the third mounting portion (53), an eccentrically arranged avoidance hole (532) of a rectangular waist hole structure is provided in the second mounting groove (531), four second mounting portions (23) for mounting the four first guide pillars (4) are provided around the first supporting portion (22), four fourth mounting portions (54) for the four first guide pillars (4) to pass through are provided around the upper platen (5), a first connecting portion (52) is provided between the second supporting portion (51) and the third mounting portion (53) and the fourth mounting portion (54), and a second connecting portion (55) for connecting the two fourth mounting portions (54) is provided on the front and rear sides of the second supporting portion (51).

3. The vertical injection molding machine according to claim 2, characterized in that: A second supporting portion (51) for mounting the injection mechanism (7) is provided in the middle upper portion of the upper platform (5), two third mounting portions (53) and four fourth mounting portions (54) are symmetrically arranged on both sides of the second supporting portion (51), and two fourth mounting portions (54) are symmetrically arranged on the front and rear sides of each third mounting portion (53), respectively. A first connecting portion (52) is provided between the second supporting portion (51) and the third mounting portion (53) and the fourth mounting portion (54), and the first connecting portion (52) is in a rib-groove structure. The thickness of the fourth mounting portion (54) is greater than that of the third mounting portion (53). A second connecting portion (55) for connecting the two fourth mounting portions (54) is provided on the front and rear sides of the second supporting portion (51), and the second connecting portion (55) is a vertical plate perpendicular to the upper side of the second supporting portion (51).

4. The vertical injection molding machine according to claim 1, characterized in that: The auxiliary mold opening assembly (8) includes a quick cylinder (81) vertically mounted on the lower platen (2), the upper piston rod end of the quick cylinder (81) is connected to a top block (82), and a positioning pin (83) for being inserted into the upper platen (5) is mounted above the top block (82).

5. The vertical injection molding machine according to claim 1, characterized in that: The injection mechanism (7) comprises a barrel (71), a screw (72) and a hopper (73). Two opposite sides of the barrel (71) are respectively provided with a seat cylinder (74) for driving the barrel (71) to move up and down. The upper part of the two seat cylinders (74) is respectively connected to a shot cylinder (75) for driving the screw (72) to move up and down. The screw (72) is connected to a motor (76) for driving the screw (72) to rotate. The barrel (71) is connected to four second guide pillars (77) for guiding its up and down movement.

6. The vertical injection molding machine according to claim 5, characterized in that: A positioning pad (30) is connected between the lower portion of the four second guide pillars (77) and the upper plate (5), and the positioning pad (30) is connected to the upper plate (5) via a plurality of eccentric adjustment structures (40). The number of the eccentric adjustment structures (40) is one or two, and the eccentric adjustment structure (40) comprises an eccentric roller bearing (401) mounted on the upper plate (5) and an eccentric adjustment block (403) mounted on the positioning pad (30). A rotating shaft (402) is provided in the bearing hole of the eccentric roller bearing (401), and the eccentric adjustment block (403) is sleeved on the rotating shaft (402). A nut (404) is screwed onto the upper portion of the rotating shaft (402), and a portion of the nut (404) is sunk into the upper surface of the eccentric adjustment block (403).

7. The vertical injection molding machine according to claim 5, characterized in that: A seat plate (78) is connected between the shooting cylinder (71) and the second guide column (77), the seat cylinder (74) and the shooting cylinder (75) are both inverted, the piston rod of the seat cylinder (74) is fixedly connected to the cylinder body of the shooting cylinder (75), and a support plate (79) is connected to the two opposite sides of the connecting piece of the motor (76) and the screw rod (72). The support plate (79) is sleeved on the second guide column (77), and the piston rod of the shooting cylinder (75) passes through the support plate (79) and is connected to the connecting piece of the motor (76) and the screw rod (72).

8. The vertical injection molding machine according to claim 5, characterized in that: Two crossbeams (20) are connected between the four first guide columns (4), and the two crossbeams (20) are arranged front and back. A sliding guide block (60) is respectively connected between the four second guide columns (77) and the crossbeams (20) close thereto, and at least one mechanical lock (50) is connected between each crossbeam (20) and the upper platform (5).

9. The vertical injection molding machine according to claim 8, characterized in that: The mechanical lock (50) includes a limit rod (501) and a guide rail block (502), wherein the limit rod (501) is vertically mounted on the upper platform (5), and a plurality of protrusions are evenly spaced along the length direction of the limit rod (501), and the two guide rail blocks (502) are symmetrically arranged on both sides of the limit rod (501), and the ends of the guide rail blocks (502) away from the limit rod (501) are fixed on the crossbeam (20), and a locking cylinder (503) is fixed between the two guide rail blocks (502), and a locking block (504) is installed at the piston rod end of the locking cylinder (503), and the locking block (504) can be clamped between the protrusions of the limit rod (501) for locking the height position of the upper platform (5), and a limit block (505) is connected below the two guide rail blocks (502) and is sleeved on the limit rod (501).

10. The vertical injection molding machine according to claim 1, characterized in that: Guardrails (90) are provided on both the left and right sides of the upper platform (5), an auxiliary oil tank (70) is provided on the rear side of the clamping cylinder (6), and the auxiliary oil tank (70) is arranged at the rear corner of the guardrail (90). The rear end of the frame (1) exceeds the lower platform (2) and forms an automated supporting part (80).

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