A turntable structure for injection molding machine

Abstract

The invention relates to a turntable structure for an injection molding machine, comprising a worktable horizontally mounted on the injection molding machine, a central axis vertically arranged in the middle of the worktable, a solid lubricating bearing embedded in the upper end of the central axis, a turntable arranged on the solid lubricating bearing and located above the worktable, a plurality of lubricating copper plates arranged between the turntable and the worktable, a plurality of diverter valves arranged at the upper end of the central axis and stacked and staggered for providing a plurality of cooling media, and a valve cover arranged at the uppermost end of the diverter valve; the invention can provide a plurality of different cooling media through a plurality of stacked and staggered diverter valves, that is, each diverter valve can provide a cooling medium alone, and a lubricating copper plate is arranged between the turntable and the worktable, which can withstand greater pressure and is not easily damaged, thereby improving production efficiency and reducing maintenance costs.

Description

Technical Field

[0001] The invention relates to the field of injection molding, in particular to a turntable structure of an injection molding machine. Background Art

[0002] As products are constantly updated, the requirements for products are getting higher and higher, resulting in more and more stringent requirements for plastic molds. One of them is that the mold requires multiple sets of cooling media; for example, the previously applied patent No. 2019207373877 discloses a turntable mechanism for a rotary injection mold. Compared with the prior art, although it solves major problems such as hose winding affecting the rotation of the turntable and the easy breakage or loosening of the hose interface, it is still difficult to solve the problem. Figure 2 From the above, the second flow channel and the medium output port of the mold are connected, resulting in only one medium being provided. In addition, due to the large clamping force of the mold, the ball is easily damaged during operation and requires frequent maintenance, which not only increases the maintenance cost but also reduces production efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a turntable structure for an injection molding machine in order to overcome the deficiencies of the prior art.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an injection molding machine turntable structure, comprising a workbench horizontally installed on the injection molding machine, a central axis vertically arranged in the middle of the workbench, a solid lubricating bearing embedded in the upper end of the central axis, a turntable arranged on the solid lubricating bearing and located above the workbench, a plurality of lubricating copper plates arranged between the turntable and the workbench, a plurality of diverter valves arranged at the upper end of the central axis and stacked and staggered for providing a variety of cooling media, a valve cover arranged at the upper end of the diverter valve, and a plurality of outer bolts and inner bolts; the bottom of the central axis is provided with a plurality of pairs of medium uniformly arranged in a circle and corresponding to the number of diverter valves Interface; each of the diverter valves includes a fixed valve core and a rotary valve body sleeved on the outer ring of the fixed valve core; the bottom of the fixed valve core is provided with a pair of blind holes and multiple pairs of through holes placed corresponding to the medium interface, and the surface is respectively provided with two transition holes that are connected to the pair of blind holes and are no longer at the same height; the inner wall of the rotary valve body is provided with two annular grooves that are spaced apart up and down and are respectively connected to the two transition holes, and the surface is provided with two groups of mold interfaces that are respectively connected to the two annular grooves; multiple external bolts are sequentially passed through multiple rotary valve bodies to be connected to the solid lubrication bearings, and multiple internal bolts are sequentially passed through the valve cover and multiple fixed valve cores to be connected to the central axis.

[0005] Preferably, the upper parts of the central axis and the fixed valve core are both provided with positioning grooves; the lower ends of the valve cover and the fixed valve core are both provided with positioning bosses which can be inserted into the positioning grooves.

[0006] Preferably, a small annular groove is provided at the bottom of the positioning groove at the medium interface or the through hole; and a small sealing member is provided at the small annular groove.

[0007] Preferably, a large annular groove is provided on the inner wall of the rotary valve body between the two annular grooves and on both upper and lower sides; and a large sealing member is provided in the large annular groove.

[0008] Preferably, the large seal and the small seal are O-rings.

[0009] Preferably, the central axis and the fixed valve core are both hollow structures.

[0010] Preferably, a lubrication groove is provided on the upper surface of each lubrication copper plate; and an oil inlet for supplying lubrication oil to the lubrication groove is also provided on the lubrication copper plate.

[0011] Preferably, the lubrication groove is in a straight line shape, a cross shape, a W shape, or a fishbone shape; and the oil inlet is arranged in the middle of the lubrication groove.

[0012] Preferably, a reflux groove is provided on the outer ring of the lubrication groove on the upper surface of the lubrication copper plate; and an oil return hole connected to the reflux groove is also provided on the lubrication copper plate.

[0013] Preferably, two oil return holes are provided and are placed symmetrically.

[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0015] 1. The present invention can provide a variety of different cooling media through multiple overlapping and staggered diverter valves, that is, each diverter valve can provide a cooling medium alone;

[0016] 2. The present invention provides a lubricating copper plate between the turntable and the workbench, which can withstand greater pressure and is not easily damaged, thereby improving production efficiency and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The technical solution of the present invention is further described below in conjunction with the accompanying drawings:

[0018] Attached Figure 1 It is a cross-sectional view of the turntable structure of the injection molding machine according to the present invention;

[0019] Attached Figure 2 A partial cross-sectional view of a pair of blind holes in a first fixed valve core of the present invention;

[0020] Attached Figure 3 A partial cross-sectional view of a pair of blind holes in a fourth fixed valve core of the present invention;

[0021] Attached Figure 4 A top view of the central axis of the present invention;

[0022] Attached Figure 5 is a cross-sectional view of the central axis of the present invention;

[0023] Attached Figure 6 A top view of the fixed valve core in the present invention;

[0024] Attached Figure 7 for Figure 6 Sectional view at AA;

[0025] Attached Figure 8 for Figure 6 Sectional view at the middle BB;

[0026] Attached Fig. 9 is a cross-sectional view of a rotary valve body in the present invention;

[0027] Attached Fig.10 This is a first structural diagram of the lubricating copper plate in the present invention;

[0028] Attached Fig.11 This is a second structural diagram of the lubricating copper plate in the present invention;

[0029] Attached Fig.12 This is a third structural diagram of the lubricating copper plate in the present invention.

[0030] Among them: 1. workbench; 2. lubricating copper plate; 21. reflux groove; 22. oil return hole; 23. oil inlet; 24. lubrication groove; 3. turntable; 4. solid lubrication bearing; 5. valve cover; 6. diverter valve; 61. rotary valve body; 611. mold outlet; 612. mold inlet; 613. large seal; 614. upper annular groove; 615. lower annular groove; 62. fixed valve core; 621. through hole; 622. blind hole; 623. transition hole; 7. center axis; 71. medium interface; 711. medium inlet; 712. medium outlet; 81. positioning groove; 82. small seal; 83. positioning boss. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Attached Figure 1-12The turntable structure of the injection molding machine of the present invention comprises a worktable 1 horizontally mounted on the injection molding machine, a central shaft 7 vertically arranged in the middle of the worktable 1, a solid lubricating bearing 4 embedded in the upper end of the central shaft 7, a turntable 3 arranged on the solid lubricating bearing 4 and located above the worktable 1, a plurality of lubricating copper plates 2 arranged between the turntable 3 and the worktable 1, four diverter valves 6 arranged at the upper end of the central shaft 7 and stacked and staggered for providing four cooling media, a valve cover 5 arranged at the upper end of the diverter valve 6, and a plurality of external The bottom of the central shaft 7 is provided with four pairs of medium interfaces 71 evenly arranged in a circle; each pair of the medium interfaces 71 is divided into a medium inlet 711 and a medium outlet 712; each of the diverter valves 6 comprises a fixed valve core 62, a rotating valve body 61 sleeved on the outer ring of the fixed valve core 62; the bottom of the fixed valve core 62 is provided with a pair of blind holes 622 and three pairs of through holes 621 corresponding to the four pairs of medium interfaces 71, and the surface is provided with two blind holes 622 and no longer connected to the pair of blind holes 622. The transition holes 623 are at the same height; the inner wall of the rotary valve body 61 is provided with two annular grooves which are arranged at intervals from top to bottom and are respectively connected to the two transition holes 623; the two annular grooves are divided into an upper annular groove 614 and a lower annular groove 615; the surface of the rotary valve body 61 is provided with two groups of mold interfaces which are respectively connected to the two annular grooves, one group of the mold interfaces includes a plurality of mold outlets 611 which are evenly arranged in a circle and are all connected to the upper annular groove 614, and the other group of the mold interfaces includes a plurality of mold inlets 612 which are evenly arranged in a circle and are all connected to the lower annular groove 615; a plurality of the outer bolts are sequentially passed through a plurality of rotary valve bodies 61 to be connected to the solid lubrication bearing 4, and a plurality of the inner bolts are sequentially passed through the valve cover 5 and a plurality of fixed valve cores 62 to be connected to the central axis 7; during installation, since a pair of blind holes 622 and three pairs of through holes 621 are provided at the bottom of the fixed valve core 62, the four diverter valves 6 are superimposed and sequentially staggered by 45 degrees, so that each diverter valve 6 can provide a cooling medium separately, specifically: Figure 2 As shown, the pair of blind holes 622 of the first fixed valve core 62 is directly connected to the first pair of medium interfaces 71, the pair of blind holes 622 of the second fixed valve core 62 is connected to the second pair of medium interfaces 71 through the first pair of through holes 621 of the first fixed valve core 62, and the pair of blind holes 622 of the third fixed valve core 62 is connected to the third pair of medium interfaces 71 through the second fixed valve core 62 and the second pair of through holes 621 of the first fixed valve core 62 in sequence, until the pair of blind holes 622 of the second fixed valve core 62 and the second pair of through holes 621 of the first fixed valve core 62 are connected. Figure 3As shown, a pair of blind holes 622 of the fourth fixed valve core 62 passes through the third fixed valve core 62, the second fixed valve core 62 and the third pair of through holes 621 of the first fixed valve core 62 in sequence, and then communicates with the fourth pair of medium interfaces 71, so as to provide a variety of different cooling media; when working, the four pairs of medium interfaces 71 can be connected to different cooling media, such as normal temperature water, ice water, oil, etc., the mold outlet 611 is connected to the cooling inlet of the mold through a hose, and the mold inlet 612 is connected to the cooling outlet of the mold through a hose. Since there are multiple mold outlets 611 and mold inlets 612, multiple interfaces can be provided to meet the use requirements of customers; specifically, the cooling medium flows into one of the blind holes 622 and the transition hole 623 through the medium inlet 711 in sequence, and enters the upper annular groove 614, and can flow out from any mold outlet 611. The cooling medium passing through the mold can flow into the lower annular groove 615 from any mold inlet 612, and then flows out from the medium outlet 712 through another transition hole 623 and the blind hole 622 in sequence, so as to realize a circulating flow.

[0033] Furthermore, the upper parts of the central shaft 7 and the fixed valve core 62 are both provided with positioning grooves 81; the lower ends of the valve cover 5 and the fixed valve core 62 are both provided with positioning bosses 83 that can be inserted into the positioning grooves 81, which play a positioning role during installation and can improve assembly efficiency.

[0034] Furthermore, a small annular groove is provided at the bottom of the positioning groove 81 at the medium interface 71 or the through hole 621; and a small sealing member 82 is provided at the small annular groove to play a sealing role.

[0035] Furthermore, large annular grooves are provided on the inner wall of the rotary valve body 61 between the upper annular groove 614 and the lower annular groove 615 and on both upper and lower sides; the large annular groove is provided with a large sealing member 613 to play a sealing role.

[0036] Furthermore, the large seal 613 is a special seal ring for the piston rod, and the small seal 82 is an O-ring, which is inexpensive and easy to repair and replace.

[0037] Furthermore, the central shaft 7 and the fixed valve core 62 are both hollow structures, which can greatly reduce the weight and facilitate transportation.

[0038] Furthermore, a lubrication groove 24 is provided on the upper surface of each lubrication copper plate 2; an oil inlet 23 for providing lubrication oil to the lubrication groove 24 is also provided on the lubrication copper plate 2; during operation, the lubrication oil can flow along the lubrication groove 24 to play a lubrication role.

[0039] Furthermore, the lubrication groove 24 is in a straight line shape, a cross shape, a W shape, or a fishbone shape, which can be freely selected according to the acceptance situation; the oil inlet 23 is arranged in the middle of the lubrication groove 24, so that the lubrication oil can flow evenly in the lubrication groove 24.

[0040] Furthermore, a reflux groove 21 is provided on the outer ring of the lubrication groove 24 on the upper surface of the lubrication copper plate 2; an oil return hole 22 connected to the reflux groove 21 is also provided on the lubrication copper plate 2 to prevent the lubrication oil from falling onto the workbench 1 under the turntable 3 and affecting the environment.

[0041] Furthermore, two oil return holes 22 are provided and are symmetrically placed to facilitate return flow.

[0042] The above are only specific application examples of the present invention and do not constitute any limitation on the protection scope of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A turntable structure for an injection molding machine, characterized in that: The invention comprises a workbench installed horizontally on the injection molding machine, a central axis vertically arranged in the middle of the workbench, a solid lubricating bearing embedded in the upper end of the central axis, a turntable arranged on the solid lubricating bearing and located above the workbench, a plurality of lubricating copper plates arranged between the turntable and the workbench, a plurality of diverter valves arranged at the upper end of the central axis and stacked and staggered for providing a variety of cooling media, a valve cover arranged at the uppermost end of the diverter valve, and a plurality of outer bolts and inner bolts; Each lubricating copper plate is provided with a lubrication groove on its upper surface; the lubricating copper plate is also provided with an oil inlet for providing lubricating oil to the lubrication groove; the lubricating copper plate is provided with a reflux groove on its upper surface at the outer ring of the lubrication groove; the lubricating copper plate is also provided with an oil return hole connected to the reflux groove; The bottom of the central axis is provided with a plurality of pairs of medium interfaces which are evenly arranged in a circle and correspond to the number of diverter valves; each of the diverter valves includes a fixed valve core and a rotating valve body which is sleeved on the outer ring of the fixed valve core; the bottom of the fixed valve core is provided with a pair of blind holes and a plurality of through holes which are placed corresponding to the medium interfaces, and the surface is provided with two transition holes which are connected to the pair of blind holes and are not at the same height; the inner wall of the rotating valve body is provided with two annular grooves which are arranged at intervals up and down and are respectively connected to the two transition holes, and the surface is provided with two groups of mold interfaces which are respectively connected to the two annular grooves; a plurality of the outer bolts are sequentially passed through a plurality of rotating valve bodies to be connected to the solid lubrication bearings, and a plurality of the inner bolts are sequentially passed through the valve cover and a plurality of fixed valve cores to be connected to the central axis.

2. The turntable structure of the injection molding machine according to claim 1, characterized in that: The upper parts of the central axis and the fixed valve core are both provided with positioning grooves; the lower ends of the valve cover and the fixed valve core are both provided with positioning bosses which can be inserted into the positioning grooves.

3. The turntable structure of the injection molding machine according to claim 2, characterized in that: The bottom of the positioning groove is provided with a small annular groove at the medium interface or the through hole; the small annular groove is provided with a small sealing member.

4. The turntable structure of the injection molding machine according to claim 3, characterized in that: A large annular groove is arranged on the inner wall of the rotary valve body between the two annular grooves and on both upper and lower sides; and a large sealing member is arranged on the large annular groove.

5. The turntable structure of the injection molding machine according to claim 4, characterized in that: The large sealing element and the small sealing element are O-shaped sealing rings.

6. The turntable structure of the injection molding machine according to claim 5, characterized in that: The central axis and the fixed valve core are both hollow structures.

7. The turntable structure of an injection molding machine according to any one of claims 1 to 6, characterized in that: The lubrication groove is in a straight line shape, a cross shape, a W shape, or a fishbone shape; the oil inlet is arranged in the middle of the lubrication groove.

8. The turntable structure of the injection molding machine according to claim 7, characterized in that: The oil return holes are provided with two holes and are symmetrically placed.

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