Hot runner upside-down oil cylinder ejection mold structure

Abstract

The utility model discloses a hot runner upside-down oil cylinder ejection mold structure which comprises a bottom plate, a sliding frame installed at the top end of the bottom plate, an ejection assembly located under the sliding frame and installed at the top end of the bottom plate, a lower plate installed at the top end of the sliding frame, an upper plate installed at the top end of the lower plate in a clamped mode, and a heat insulation plate installed at the top end of the upper plate. According to the hot runner upside-down oil cylinder ejection mold structure disclosed by the utility model, uniform ejection force is provided while efficient filling of the hot runner is maintained, and the mold maintenance and production cost is reduced; by optimizing the inverted structural design of the hot runner, plastic flows more uniformly, the filling efficiency is improved, and dead angles of the hot runner are reduced; according to the double-oil-cylinder balance type ejection device, a double-oil-cylinder ejection system is adopted, it is guaranteed that ejection force is evenly distributed, and uneven ejection force and mold damage caused by a single oil cylinder are avoided; and through the partition heating design and the local heating device, it is ensured that the temperature control of the hot runner is more accurate, and the filling quality and stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is a hot runner upside down oil cylinder ejection mold structure. BACKGROUND

[0002] With the continuous development of injection molding technology, hot runner system as the important technology of improving production efficiency and forming precision has been widely used in plastic injection mold, hot runner system can effectively control temperature and plastic flow in the injection molding process, reduce material waste, improve filling speed, however, in some complex product mold, especially for the mold with high ejection force requirement, the design of hot runner and ejection device often has certain challenge.

[0003] However, the traditional mold has the following shortcomings:

[0004] (1) the current traditional oil cylinder ejection system has low efficiency, poor stability and insufficient ejection force in the injection of many complex products, especially in the hot runner mold that needs to be upside down, how to ensure the efficient and stable operation of the hot runner system while realizing the efficient and uniform ejection force has become the key to technological innovation;

[0005] (2) the traditional hot runner system in some molds may cause uneven plastic flow and incomplete filling due to improper design of upside down structure;

[0006] (3) the oil cylinder ejection force in some molds may cause uneven stress in the ejection process due to improper design, affecting the ejection effect, and even causing product deformation;

[0007] (4) in the traditional mold, the design of hot runner and oil cylinder ejection system is complex, which leads to large workload of mold installation, maintenance and adjustment, increases the production cycle and cost;

[0008] (5) in the upside down hot runner mold, the unreasonable design of flow channel may cause uneven temperature control and poor material flow, affecting the production efficiency and forming quality. INVENTION CONTENTS

[0009] The utility model discloses a hot runner upside-down oil cylinder ejection mold structure to solve the low efficiency, poor stability and insufficient ejection force of the traditional oil cylinder ejection system in the injection molding of many complex products in the above background art, especially in the hot runner mold that needs to be upside down, how to ensure the efficient and stable operation of the hot runner system while realizing efficient and uniform ejection force has become the key to technological innovation.

[0010] To achieve the above object, the utility model provides the following technical scheme: a hot runner upside-down oil cylinder ejection mold structure, including the bottom plate, the top of bottom plate installs the sliding frame, the top of bottom plate installs the ejection assembly in the direct below of sliding frame, the top of sliding frame installs the lower plate, the top of lower plate is clamped and installs the upper plate, the top of upper plate installs the heat insulation plate, the top of heat insulation plate installs the panel, the middle part fixed mounting of panel has the locating ring, the inside installation of locating ring has the blanking assembly, the ejection assembly includes length shell and two connecting springs, the top of length shell is equipped with the roof, and the bottom of roof both sides are fixedly connected with the top of two connecting springs respectively, the both sides of sliding frame are all set up height groove, and the bottom plate is installed two double cylinder ejection assemblies of two sides in sliding frame respectively.

[0011] Preferably, the two double cylinder ejection assemblies each include a first cylinder and a connecting plate, the fixed end of the first cylinder is fixedly connected with the bottom end of the connecting plate, the top end of the connecting plate is fixedly installed with a second cylinder, one end of the connecting plate is fixedly installed with a displacement block, the movable end of the first cylinder is fixedly connected with the side opposite to the bottom plate, the movable end of the second cylinder is fixedly connected with the side opposite to the panel, the two displacement blocks are respectively in sliding connection with the two height grooves, the first cylinder performs telescopic movement, the first cylinder reversely pushes the connecting plate, so that the displacement block slides along the height groove, the height of the double cylinder ejection assembly is adjusted for the first time, and the second cylinder performs telescopic movement, the second cylinder pushes the panel from the bottom, and the height of the panel is adjusted.

[0012] Preferably, the blanking assembly comprises a blanking shell and a multi-hole positioning plate, the inside of the blanking shell is fixedly connected with the multi-hole positioning plate, the top end of the multi-hole positioning plate is rotationally connected with a stirring paddle, the bottom end of the stirring paddle is fixedly installed with a driven umbrella bevel gear, one side of the inner wall of the blanking shell is rotationally connected with a rotating shaft, one end of the rotating shaft is fixedly installed with a driving umbrella bevel gear, the outer side of the driving umbrella bevel gear is meshingly connected with the outer side of the driven umbrella bevel gear, the surface of the blanking shell is fixedly installed with a micro motor for driving the rotating shaft to rotate, the micro motor is started after being electrified, the micro motor drives the rotating shaft to rotate, the rotating shaft drives the driving umbrella bevel gear to rotate, the driving umbrella bevel gear contacts the driven umbrella bevel gear, and the driven umbrella bevel gear drives the stirring paddle to rotate, so that the injection molding material injected into the blanking shell is stirred.

[0013] Preferably, the bottom end of the blanking shell is fixedly communicated with the positioning ring.

[0014] Preferably, the top end of the top plate is provided with an ejection groove, the inside of the ejection groove is slidably connected with a displacement plate, the top end of the displacement plate is fixedly installed with an ejection rod, the top end of the ejection rod is fixedly connected with the middle portion of the bottom end of the top plate, the bottom end of the displacement plate is fixedly installed with a spring shock absorber, the bottom end of the spring shock absorber is fixedly connected with the bottom end of the inner wall of the ejection groove, the top plate extrudes the spring, and in the sliding process of the top plate relative to the length shell, the top plate extrudes the displacement plate, the displacement plate extrudes the spring shock absorber, and the connected spring and spring shock absorber buffer the extrusion force.

[0015] Preferably, the bottom end of the length shell and the bottom end of the two connecting springs are fixedly connected with the bottom plate, and the top end of the top plate is connected with the side opposite to the sliding frame.

[0016] Preferably, the surface of the lower plate is provided with a plurality of heating holes, and the surface of the upper plate is provided with a plurality of temperature sensing holes; the heating holes are arranged to place thermocouples therein to heat the products in the lower plate; and the temperature sensing holes are arranged to install temperature sensors therein to sense the temperature of the upper plate.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] 1. While maintaining the high efficiency of the hot runner, uniform ejection force is provided, mold maintenance and production cost are reduced;

[0019] 2. By optimizing the design of the inverted structure of the hot runner, the plastic flow is more uniform, the filling efficiency is improved, and the dead angle of the hot runner is reduced;

[0020] 3. Double oil cylinder balanced type ejection device: a double oil cylinder ejection system is adopted to ensure uniform distribution of ejection force and avoid uneven ejection force and mold damage caused by single oil cylinder;

[0021] 4、Through the partition heating design and local heating device, ensure the temperature control of hot runner more accurate, improve the filling quality and stability;

[0022] 5、Through the ejection force distribution system and adjustable ejection pressure device, make the ejection process more uniform, reduce the deformation and damage of the product;

[0023] 6、Through the selection of high thermal conductivity and wear-resistant materials, improve the durability of the mold, reduce the wear of hot runner and oil cylinder part, prolong the service life of the mold. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the side view of the utility model;

[0025] Figure 2 is the sectional view of the ejection assembly of the utility model;

[0026] Figure 3 is the local schematic view of the utility model;

[0027] Figure 4 is the sectional view of the blanking assembly of the utility model.

[0028] In the drawing: 1, bottom plate; 2, sliding frame; 3, ejection assembly; 31, length shell; 32, connecting spring; 33, top plate; 34, ejection rod; 35, displacement plate; 36, spring shock absorber; 37, ejection groove; 4, double-cylinder ejection assembly; 41, first cylinder; 42, displacement block; 43, connecting plate; 44, second cylinder; 5, lower plate; 6, upper plate; 7, panel; 8, positioning ring; 9, blanking assembly; 91, blanking shell; 92, stirring paddle; 93, multi-hole positioning plate; 94, driven umbrella bevel gear; 95, driving umbrella bevel gear; 96, rotating shaft; 97, micro motor; 10, heat insulation plate; 11, temperature sensing hole; 12, heating hole; 13, height groove. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model.

[0030] Please refer to Figures 1-4The utility model provides a hot runner upside -down oil cylinder ejection mold structure, including bottom plate 1, the top of bottom plate 1 is installed with sliding frame 2, the top of bottom plate 1 is installed with the ejection assembly 3 of being located in the just below of sliding frame 2, the top of sliding frame 2 is installed with lower plate 5, the top of lower plate 5 is engaged with the mounting of upper plate 6, the top of upper plate 6 is installed with heat insulating plate 10, the top of heat insulating plate 10 is installed with panel 7, the middle part fixed mounting of panel 7 is equipped with the locating ring 8, the inside installation of locating ring 8 has blanking assembly 9, and the ejection assembly 3 includes length shell 31 and two connecting springs 32, and the top of length shell 31 is equipped with top plate 33, and the both sides of the bottom of top plate 33 are fixedly connected with the top of two connecting springs 32 respectively, and the both sides of sliding frame 2 are all set up with height groove 13, and the bottom plate 1 is installed with two double cylinder ejection assemblies 4 of being located in the both sides of sliding frame 2 respectively.

[0031] Two double cylinder ejection assemblies 4 all include first cylinder 41 and connecting plate 43, and the fixed end of first cylinder 41 is fixedly connected with the bottom end of connecting plate 43, and the top of connecting plate 43 is fixedly installed with second cylinder 44, and one end of connecting plate 43 is fixedly installed with displacement block 42, and the movable end of first cylinder 41 is fixedly connected with the side of bottom plate 1, and the movable end of second cylinder 44 is fixedly connected with the side of panel 7, and two displacement blocks 42 are slidably connected with two height grooves 13 respectively, and first cylinder 41 carries out telescopic motion, and first cylinder 41 reversely pushes connecting plate 43, so that displacement block 42 slides along height groove 13, and the height of double cylinder ejection assembly 4 is adjusted for the first time, and second cylinder 44 carries out telescopic motion, and second cylinder 44 pushes panel 7 from the bottom, and the height of panel 7 is adjusted.

[0032] Blanking assembly 9 includes blanking shell 91 and porous positioning plate 93, and the inside of blanking shell 91 is fixedly connected with porous positioning plate 93, and the top of porous positioning plate 93 is rotatably connected with stirring paddle 92, and the bottom of stirring paddle 92 is fixedly installed with driven umbrella bevel gear 94, and one side of the inner wall of blanking shell 91 is rotatably connected with rotating shaft 96, and one end of rotating shaft 96 is fixedly installed with driving umbrella bevel gear 95, and the outside of driving umbrella bevel gear 95 is meshedly connected with the outside of driven umbrella bevel gear 94, and the surface of blanking shell 91 is fixedly installed with micro motor 97 for driving rotating shaft 96 to rotate, and micro motor 97 is started after electrification, and micro motor 97 drives rotating shaft 96 to rotate, and rotating shaft 96 drives driving umbrella bevel gear 95 to rotate, and driving umbrella bevel gear 95 contacts driven umbrella bevel gear 94, and driven umbrella bevel gear 94 drives stirring paddle 92 to rotate, and the injection molding material injected in blanking shell 91 is stirred.

[0033] The bottom of blanking shell 91 is fixedly connected with locating ring 8.

[0034] The top end of the top plate 33 is provided with an ejection groove 37, the inside of the ejection groove 37 is slidably connected with a displacement plate 35, the top end of the displacement plate 35 is fixedly installed with an ejection rod 34, the top end of the ejection rod 34 is fixedly connected with the middle part of the bottom end of the top plate 33, the bottom end of the displacement plate 35 is fixedly installed with a spring shock absorber 36, the bottom end of the spring shock absorber 36 is fixedly connected with the bottom end of the inner wall of the ejection groove 37, the top plate 33 is extrudedly connected with the spring 32, and in the sliding process of the top plate 33 relative to the length shell 31, the top plate 33 extrudes the displacement plate 35, the displacement plate 35 extrudes the spring shock absorber 36, and the spring 32 and the spring shock absorber 36 buffer the extrusion force.

[0035] The bottom end of the length shell 31 and the bottom end of the two springs 32 are fixedly connected with the bottom plate 1, and the top end of the top plate 33 is connected with the side of the slide frame 2 opposite to the other side.

[0036] The surface of the lower plate 5 is provided with a plurality of heating holes 12, and the surface of the upper plate 6 is provided with a plurality of temperature sensing holes 11, a thermocouple is placed in the heating hole 12 to heat the product in the lower plate 5, and a temperature sensor is installed in the temperature sensing hole 11 to sense the temperature of the upper plate 6.

[0037] In use, the micro motor 97 is started after being powered on, the micro motor 97 drives the rotating shaft 96 to rotate, the rotating shaft 96 drives the driving umbrella bevel gear 95 to rotate, the driving umbrella bevel gear 95 contacts the driven umbrella bevel gear 94, the driven umbrella bevel gear 94 drives the stirring paddle 92 to rotate, the injected injection material in the discharging shell 91 is stirred, in the injection process, the top plate 33 extrudes the spring 32, and in the sliding process of the top plate 33 relative to the length shell 31, the top plate 33 extrudes the displacement plate 35, the displacement plate 35 extrudes the spring shock absorber 36, the spring 32 and the spring shock absorber 36 buffer the extrusion force, the thermocouple placed in the heating hole 12 heats the product in the lower plate 5, and the temperature sensor installed in the temperature sensing hole 11 senses the temperature of the upper plate 6.

[0038] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A hot runner inverted hydraulic cylinder ejection mold structure, comprising a base plate (1), characterized in that: A sliding frame (2) is installed at the top of the base plate (1). An ejector assembly (3) located directly below the sliding frame (2) is installed at the top of the base plate (1). A lower plate (5) is installed at the top of the sliding frame (2). An upper plate (6) is engaged at the top of the lower plate (5). A heat insulation plate (10) is installed at the top of the upper plate (6). A panel (7) is installed at the top of the heat insulation plate (10). A positioning ring (8) is fixedly installed in the middle of the panel (7). The ring (8) is equipped with a feeding assembly (9). The ejection assembly (3) includes a length shell (31) and two connecting springs (32). The top of the length shell (31) is provided with a top plate (33). The two sides of the bottom of the top plate (33) are fixedly connected to the top of the two connecting springs (32). The sliding frame (2) is provided with height grooves (13) on both sides. The bottom plate (1) is equipped with two double-cylinder ejection assemblies (4) located on both sides of the sliding frame (2).

2. The hot runner inverted hydraulic cylinder ejection mold structure according to claim 1, characterized in that: Both of the dual-cylinder ejection assemblies (4) include a first cylinder (41) and a connecting plate (43). The fixed end of the first cylinder (41) is fixedly connected to the bottom end of the connecting plate (43). A second cylinder (44) is fixedly installed on the top end of the connecting plate (43). A displacement block (42) is fixedly installed on one end of the connecting plate (43). The movable end of the first cylinder (41) is fixedly connected to the side of the base plate (1) facing the bottom plate (1). The movable end of the second cylinder (44) is fixedly connected to the side of the panel (7) facing the panel. The two displacement blocks (42) are slidably connected to the two height grooves (13) respectively.

3. The hot runner inverted hydraulic cylinder ejection mold structure according to claim 1, characterized in that: The feeding assembly (9) includes a feeding shell (91) and a porous positioning plate (93). The interior of the feeding shell (91) is fixedly connected to the porous positioning plate (93). A stirring paddle (92) is rotatably connected to the top of the porous positioning plate (93). A driven bevel gear (94) is fixedly installed at the bottom of the stirring paddle (92). A rotating shaft (96) is rotatably connected to one side of the inner wall of the feeding shell (91). A driving bevel gear (95) is fixedly installed at one end of the rotating shaft (96). The outer side of the driving bevel gear (95) meshes with the outer side of the driven bevel gear (94). A micro motor (97) for driving the rotating shaft (96) to rotate is fixedly installed on the surface of the feeding shell (91).

4. The hot runner inverted hydraulic cylinder ejection mold structure according to claim 3, characterized in that: The bottom end of the feed shell (91) is fixedly connected to the positioning ring (8).

5. The hot runner inverted hydraulic cylinder ejection mold structure according to claim 1, characterized in that: The top plate (33) has an ejection groove (37) at its top end. A displacement plate (35) is slidably connected inside the ejection groove (37). An ejection rod (34) is fixedly installed at the top end of the displacement plate (35). The top end of the ejection rod (34) is fixedly connected to the middle part of the bottom end of the top plate (33). A spring damper (36) is fixedly installed at the bottom end of the displacement plate (35). The bottom end of the spring damper (36) is fixedly connected to the bottom end of the inner wall of the ejection groove (37).

6. The hot runner inverted hydraulic cylinder ejection mold structure according to claim 1, characterized in that: The bottom end of the length shell (31) and the bottom end of the two connecting springs (32) are fixedly connected to the base plate (1), and the top end of the top plate (33) is connected to the side of the sliding frame (2) directly opposite.

7. The hot runner inverted hydraulic cylinder ejection mold structure according to claim 1, characterized in that: The surface of the lower plate (5) is provided with a plurality of heating holes (12), and the surface of the upper plate (6) is provided with a plurality of temperature sensing holes (11).

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