A large tonnage double injection high automation low operation surface equipment

Abstract

The application provides a large-tonnage double-injection high-automation low-operation-surface equipment, which comprises a rack, an upper mold plate and a lower mold plate, the rack is used as a support and an installation carrier for installing other components; the upper mold plate is vertically slidably arranged on the rack, an upper driving cylinder for driving the upper mold plate to move up and down is arranged on the rack, and an injection unit is arranged on the upper mold plate; the lower mold plate is vertically slidably arranged on the rack and located directly below the upper mold plate, an auxiliary lifting cylinder for driving the lower mold plate to move up and down is arranged on the rack, and a mold locking oil cylinder for locking the mold is fixed directly below the lower mold plate. The large-tonnage double-injection high-automation low-operation-surface equipment has a compact structure, good fit degree and high mold locking force when the mold plates are closed, can avoid flash of large-size injection molded parts, and greatly improves product quality and yield.

Description

TECHNICAL FIELD

[0001] The present application relates to an injection molding production equipment, in particular to a large tonnage double-injection high-automation low-operation-surface equipment. BACKGROUND

[0002] In the production of large injection parts, due to the large width or diameter, the injection machine has a large or long size of the forming mold. In the traditional process, due to the influence of the structure of the injection machine, the mold is prone to micro deflection due to unbalanced thrust, and then burrs are generated, which need to be processed later, which is time-consuming and laborious, low in production efficiency, and increases the processing cost. At the same time, the traditional injection machine has low injection output, which cannot meet the production requirements of large injection parts. SUMMARY

[0003] 【1】Technical problems to be solved

[0004] The technical problem to be solved by the present application is to provide a large tonnage double-injection high-automation low-operation-surface equipment with large injection capacity, high mold locking pressure, uniform mold locking force, and high product quality.

[0005] 【2】Technical solutions to solve problems

[0006] The present application provides a large tonnage double-injection high-automation low-operation-surface equipment, comprising:

[0007] A rack 1 is used as a support and installation carrier to install other components;

[0008] An upper mold plate 7 is vertically and slidingly fitted on the rack 1, and the rack 1 is provided with an upper driving cylinder 9 for driving the upper mold plate to move up and down, and the upper mold plate is provided with an injection unit 8;

[0009] A lower mold plate 4 is vertically and slidingly fitted on the rack 1 and located directly below the upper mold plate, and the rack 1 is provided with an auxiliary lifting cylinder 42 for driving the lower mold plate 4 to move up and down, and the lower mold plate 4 is fixed with a mold locking oil cylinder 41 below.

[0010] Further, the mold locking oil cylinder 41 is fixed at the bottom of the lower mold plate and its output shaft is vertically and downwardly arranged, and the lower end of the rack 1 is provided with a supporting base 3 for contacting the output shaft of the mold locking oil cylinder 41 to realize mold locking.

[0011] Further, the lower end of the locking oil cylinder 41 forms a top material area, the support base 3 is horizontally slidably arranged on the frame 1, when the lower die plate 4 moves upward and is in the clamping state, the support base 3 horizontally slides into the top material area and is used for supporting the locking oil cylinder 41 to realize the clamping; when the lower die plate is opened, the support base 3 horizontally slides out of the top material area and contains the lower die plate 4 to fall.

[0012] Further, the lower end of the frame 1 is provided with a slide 2 capable of realizing horizontal sliding and a slide cylinder used for driving the horizontal sliding of the slide 2, the support base 3 is installed on the top of the slide 2, and when the slide 2 is located at the inner limit position, the support base 3 is located directly below the lower die plate.

[0013] Further, the support base 3 is formed by stacking support base plates and is height-adjustable.

[0014] Further, the injection unit is at least two.

[0015] Further, the lower end of the lower die plate 4 is fixed with a lower die seat, the lower die seat is formed with an oil cavity with an open lower end, the lower end of the lower die seat is sealingly connected with a cylinder barrel coaxial with the oil cavity, a plunger is vertically and slidably arranged in the cylinder barrel and forms the locking oil cylinder 41, and the side wall of the oil cavity is provided with an oil inlet and an oil outlet.

[0016] Further, the frame is provided with a sensing device, when the lower die plate moves upward to a set distance, the sensing device is triggered, and the slide cylinder is triggered to push the support base into the top material area.

[0017] Further, the upper driving cylinder 9 is at least two and is circumferentially and uniformly distributed around the axis of the upper die plate.

[0018] Further, the upper die plate and / or the lower die plate is provided with a synchronous assembly, the synchronous assembly comprises four balance seats 74 fixed on the side wall of the upper die plate or the lower die plate, the balance seat is provided with a vertical guide hole, the frame is provided with a guide rod 72 corresponding to the vertical guide hole and inserted into the guide hole and realizing sliding fit, the side wall of the guide rod is provided with a gear tooth and forms a first gear rack and a second gear rack with the same gear pitch, a first balance rod 71 is rotatably installed between two balance seats on the same side, and the first balance rod is fixed with a first balance gear engaged with the first gear rack; a second balance rod 73 is rotatably installed between two balance seats on the same end, and the second balance rod is fixed with a second balance gear engaged with the second gear rack.

[0019] 【3】Beneficial effects

[0020] The large-tonnage double-injection high-automation low-operation-surface equipment sets an auxiliary lifting cylinder, can improve the lifting speed of the lower mold plate, improve the mold closing speed, and further improve the work efficiency; sets a mold locking oil cylinder, has large mold locking force, is stable in mold locking, improves the adhesion between the molds, avoids the generation of problems such as flash, and further improves the injection quality; sets an internal oil cavity structure, improves the lifting reliability and stability, and ensures the mold closing reliability; sets a large-diameter plunger structure, has large pressure, simultaneously improves the contact area, avoids the generation of force arm and causes the slight inclination of the mold plate, greatly improves the balance and reliability of mold closing, and improves the product quality; sets a multi-injection unit structure, improves the injection amount per unit time, has high injection efficiency, simultaneously can avoid the generation of injection gap, and improves the production efficiency and product quality; sets a multi-cylinder body driving of the upper mold, has large driving force and good balance, improves the mold closing force and adhesion, avoids the generation of flash, and further improves the injection quality; sets a synchronous assembly, realizes the overall balance degree when the mold plate moves, improves the operation precision, avoids the inclination, ensures the adhesion when the mold plate closes, and ensures the injection quality; the large-tonnage double-injection high-automation low-operation-surface equipment has compact structure, good adhesion and high mold locking force when the mold plate closes, can avoid the generation of flash of large-size injection molded parts, and greatly improves the product quality and yield. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Fig. 1 is a structural schematic view of the large-tonnage double-injection high-automation low-operation-surface equipment of the present application;

[0022] Figure 2 Fig. 2 is a sectional view of the large-tonnage double-injection high-automation low-operation-surface equipment of the present application; Figure 1 Fig. 3 is an enlarged view of the A part in Fig. 2;

[0023] Figure 3 Fig. 4 is a front view of the large-tonnage double-injection high-automation low-operation-surface equipment of the present application;

[0024] Figure 4 Fig. 5 is a left view of the large-tonnage double-injection high-automation low-operation-surface equipment of the present application;

[0025] Figure 5 Fig. 6 is a structural schematic view of the injection unit of the large-tonnage double-injection high-automation low-operation-surface equipment of the present application. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described in detail below with reference to the drawings.

[0027] Referring to Figures 1-5 The present application provides a large-tonnage double-injection high-automation low-operation-surface equipment for injection of large-size plastic or rubber products, which comprises a rack 1, an upper mold plate 7 and a lower mold plate 4.

[0028] The rack 1 as a whole is used as a support and mounting carrier for mounting other components, and comprises a lower base fixed on the ground by bolts, four or more columns arranged on the lower base, and an upper base fixed on the top of the columns, forming a mounting area (working area) between the upper base and the lower base.

[0029] The upper mold plate 7 is vertically slidably arranged on the rack 1 and located in the mounting area, and the rack 1 is provided with an upper driving cylinder 9, the output shaft of which is connected with the upper mold plate and used to drive the upper mold plate to move up and down. In the embodiment, the upper driving cylinder 9 is vertically fixed on the top of the upper base, the output shaft of the upper driving cylinder penetrates through the upper base downward and is rigidly connected with the upper mold plate, so as to drive the upper mold plate. The upper driving cylinder is a large-thrust oil cylinder, the sliding plug of which has a large diameter and can realize high-pressure output. In the embodiment, the upper driving cylinder 9 is at least two and is circumferentially distributed around the axis of the upper mold plate. Preferably, the upper driving oil cylinder is four and arranged in a matrix shape. An injection unit 8 is arranged on the upper mold plate and used to inject molten material into the molding cavity.

[0030] The injection unit comprises an injection mechanism and a nozzle, the nozzle is arranged on the bottom of the upper mold plate, and the injection mechanism is fixed on the top of the upper base and used to inject raw materials into the molding cavity. Specifically, the injection mechanism comprises a barrel and a hydraulic motor, a main sleeve is arranged in the upper mold plate, the main sleeve is vertically arranged and coaxial with the barrel, the barrel is vertically fixed on the upper base and coaxial with the main sleeve, the barrel is sleeved in the main sleeve and can axially slide, a screw for conveying materials is rotatably arranged in the barrel, the hydraulic motor is fixed on the end of the barrel, the output shaft of the hydraulic motor is rigidly connected with the screw and used to drive the screw to rotate, and an electric heater is arranged on the side wall of the barrel and used to heat and melt the materials in the barrel.

[0031] In the embodiment, the injection unit is two, which can improve the injection amount per unit time, improve the injection efficiency, and improve the product quality.

[0032] The lower die plate 4 is vertically slidably arranged on the frame 1 and is located directly below the upper die plate, and the frame 1 is provided with auxiliary lifting cylinders 42 for driving the lower die plate 4 to move up and down. Specifically, the auxiliary lifting cylinders 42 are four or more and are symmetrically arranged on the edge (side wall) of the lower die plate. Meanwhile, a locking oil cylinder 41 is fixed directly below the lower die plate 4, which generates a large thrust on the lower die plate to achieve locking. The locking oil cylinder 41 is fixed at the center of the bottom of the lower die plate, and the output shaft thereof is vertically downward. Meanwhile, a supporting base 3 is arranged at the lower end of the frame 1, which is used to contact the output shaft of the locking oil cylinder 41 to support the locking oil cylinder and complete the locking. The side wall of the oil cavity is provided with an oil inlet and an oil outlet. Specifically, a lower die seat is fixed at the lower end of the lower die plate 4, and an oil cavity with an open lower end is formed in the lower die seat. Meanwhile, a cylinder barrel is sealingly connected to the lower end of the lower die seat, the cylinder barrel is coaxial with the oil cavity, and a plunger is vertically slidably arranged in the cylinder barrel to form the locking oil cylinder 41. The lower end of the cylinder barrel extends radially inward to form a sliding cavity, which is used to fit the outer wall of the plunger to achieve the sliding fit of the plunger. The sliding cavity has a certain axial length to increase the contact area with the plunger and improve the sliding stability. In the embodiment, the axial length of the contact is 1 / 4-1 / 3 of the diameter of the plunger. A plurality of sealing rings are arranged on the inner wall of the sliding cavity.

[0033] The lower end of the locking oil cylinder 41 forms a stripping (molding) area. In the embodiment, the supporting base 3 is horizontally slidably arranged on the frame 1. When the lower die plate 4 moves upward and is in the clamping or about to be clamped, the supporting base 3 horizontally slides into the stripping area to support the locking oil cylinder 41 and achieve locking. When the lower die plate is opened or about to be opened, the supporting base 3 horizontally slides out of the stripping area to accommodate the falling of the lower die plate 4 and increase the falling space. Specifically, a sliding seat 2 and a sliding seat cylinder are arranged at the lower end of the frame 1. The sliding seat 2 can horizontally slide, and the sliding seat cylinder is used to drive the sliding seat 2 to horizontally slide. The supporting base 3 is installed on the top of the sliding seat 2. When the sliding seat 2 is located at the inner limit position, the supporting base 3 is located directly below the lower die plate. At this time, the supporting base 3 can provide a supporting point for the locking oil cylinder. In order to facilitate the height adjustment, the supporting base 3 is formed by stacking a plurality of supporting base plates in the embodiment. Preferably, the supporting base 3 is circular. A positioning structure is arranged between adjacent two supporting base plates for radial positioning. The positioning structure is a positioning groove and a positioning boss. Different numbers of supporting base plates or different thicknesses of supporting base plates can be stacked to achieve height adjustment and meet different use requirements.

[0034] In order to realize automatic control, the sensing device is arranged on the rack, and when the lower die plate moves upward to the set distance, the sensing device is triggered, the sensing device sends the sensing signal, and the sensing signal is transmitted to the control device, the control device sends the control signal, and the slide cylinder is triggered to act, so that the support seat is pushed into or out of the material feeding area. The above-mentioned sensing device can be a contact switch or an infrared or laser sensor.

[0035] In the present application, the middle die 5 is also arranged on the rack, and is horizontally slidably arranged on the rack and located between the upper die plate and the lower die plate. When needed, the upper die plate is lowered and the lower die plate is raised when sliding into the installation area, and complete die clamping can be realized. When not needed, it can be horizontally slid to the outside of the installation area.

[0036] In order to facilitate material taking, a material taking manipulator is arranged on the other side of the rack, which can realize horizontal and vertical sliding, and is used to realize the taking out of the products in the installation area.

[0037] In order to improve the parallelism of the upper die plate and the movement of the upper die plate, and avoid tilting to cause flash and other quality problems, in the present embodiment, synchronous components are arranged on the upper die plate and the lower die plate. The synchronous components include four balance seats 74 fixed on the side walls of the upper die plate or the lower die plate, vertical guide holes are formed in the balance seats, and a plurality of guide rods 72 are arranged on the rack. The guide rods 72 correspond to the vertical guide holes one by one, are sleeved with the guide holes, and are slidably arranged. The two side walls of the guide rod are provided with teeth and form a first gear rack and a second gear rack. The first gear rack and the second gear rack have the same pitch. A first balance rod 71 is rotatably arranged between the two balance seats on the same side. A first balance gear is fixed on the first balance rod and engaged with the first gear rack. A second balance rod 73 is rotatably arranged between the two balance seats on the same end. The second balance rod 73 is perpendicular to the first balance rod 71. A second balance gear is fixed on the second balance rod and engaged with the second gear rack. The second balance gear can realize synchronous lifting or lowering of the upper die plate or the lower die plate, and avoid production tilting.

[0038] The large-tonnage double-injection high-automation low-operation-surface equipment is provided with an auxiliary lifting cylinder, which can improve the lifting speed of the lower mold plate, improve the mold closing speed, and further improve the work efficiency; the locking oil cylinder is provided, the locking force is large, the mold locking is stable, the adhesion between the molds is improved, the problems such as flash are avoided, and the injection quality is further improved; the built-in oil cavity structure is provided, the lifting reliability and stability are improved, and the mold closing reliability is ensured; the large-diameter plunger structure is provided, the pressure is large, the contact area is improved, the force arm is avoided to cause the slight inclination of the mold plate, the balance and reliability of the mold closing are greatly improved, and the product quality is improved; the multi-injection unit structure is provided, the injection amount per unit time is improved, the injection efficiency is high, injection gaps can be avoided, and the production efficiency and product quality are improved; the upper mold is driven by multiple cylinders, the driving force is large and the balance is good, the mold closing force and the adhesion are improved, the flash is avoided, and the injection quality is further improved; the synchronous assembly is provided, the overall balance during the movement of the mold plate is realized, the operation precision is improved, the inclination is avoided, the adhesion of the mold closing is ensured, and the injection quality is ensured; the large-tonnage double-injection high-automation low-operation-surface equipment has a compact structure, good adhesion and high mold locking force when the mold plate is closed, can avoid the generation of flash for large-size injection molded parts, and greatly improves the product quality and the yield.

[0039] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the technical principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A large-tonnage, dual-injection, highly automated, low-operation-surface equipment, characterized in that, include: The frame serves as a support and mounting platform for installing other components. The upper template is vertically slidably mounted on the frame, and the frame is equipped with an upper drive cylinder for driving the upper template to move up and down. The upper template is equipped with an injection unit. The lower template is vertically slidably mounted on the frame and located directly below the upper template. The frame is equipped with an auxiliary lifting cylinder for driving the lower template to move up and down. A mold-locking cylinder for locking the mold is fixed directly below the lower template. The mold-locking cylinder is fixed to the bottom of the lower template and its output shaft is vertically downward. The lower end of the frame is provided with a support base for contacting the output shaft of the mold-locking cylinder to achieve mold locking. The lower end of the mold-locking cylinder forms an ejector area, and the support base is horizontally slidably mounted on the frame. When the lower mold plate moves upward and is in the mold-closing state, the support base slides horizontally into the ejector area and is used to support the mold-locking cylinder to achieve mold locking. When the lower mold plate separates, the support base slides horizontally outside the ejector area and allows the lower mold plate to fall. The upper template and / or the lower template are provided with a synchronization component. The synchronization component includes four balance seats fixed to the side wall of the upper template or the lower template. The balance seats are provided with vertical guide holes. The frame is provided with guide rods that correspond to the vertical guide holes and are inserted into the guide holes to achieve sliding engagement. The side wall of the guide rod is provided with gear teeth to form a first rack and a second rack with the same tooth pitch. A first balance rod is rotatably installed between the two balance seats on the same side. A first balance gear that meshes with the first rack is fixed on the first balance rod. A second balance rod is rotatably installed between the two balance seats on the same end. A second balance gear that meshes with the second rack is fixed on the second balance rod.

2. The large-tonnage dual-injection, highly automated, low-operation-surface equipment as described in claim 1, characterized in that: The lower end of the frame is provided with a slide block that can slide horizontally and a slide block cylinder for driving the slide block to slide horizontally. The support base is installed on the top of the slide block, and when the slide block is in the inner limit position, the support base is located directly below the lower template.

3. The large-tonnage dual-injection, highly automated, low-operation-surface equipment as described in claim 1, characterized in that: The support base is composed of stacked support plates and its height is adjustable.

4. The large-tonnage dual-injection, highly automated, low-operation-surface equipment as described in claim 1, characterized in that: The injection unit comprises at least two units.

5. The large-tonnage dual-injection, highly automated, low-operation-surface equipment as described in claim 1, characterized in that: The lower end of the lower template is fixed with a lower mold base. An oil cavity with an open lower end is formed inside the lower mold base. A cylinder coaxial with the oil cavity is sealed and connected to the lower end of the lower mold base. A plunger is vertically slidably installed inside the cylinder to form the mold-locking cylinder. The side wall of the oil cavity is provided with an oil inlet and an oil outlet.

6. The large-tonnage dual-injection, highly automated, low-operation-surface equipment as described in claim 1, characterized in that: The frame is equipped with a sensing device. When the lower template moves upward to a set distance, the sensing device is triggered, and the sliding cylinder is triggered to push the support seat into the top material area.

7. The large-tonnage dual-injection, highly automated, low-operation-surface equipment as described in claim 1, characterized in that: The upper drive cylinders are at least two and are evenly distributed circumferentially around the axis of the upper template.

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