Culture dish double-layer injection mold with spiral water cooling function

Abstract

The utility model provides a culture dish double-layer injection mold which comprises a main runner air cylinder plate, and a splitter plate, a cavity plate, a push plate, a core plate and a fixing plate which are sequentially arranged on the two sides of the main runner air cylinder plate, the center of the main runner air cylinder plate is connected with a feeding rod, and the feeding rod is provided with a hot runner main channel in a penetrating manner in the length direction of the feeding rod; a plurality of dish bottom product cavities and dish cover product cavities are respectively arranged among the core plate, the push plate and the cavity plate on the left side and the right side; a spiral water conveying core extending into the mold core insert is connected to the surface of the fixing plate, a spiral drainage groove is formed in the outer side face of the spiral water conveying core, a water inlet channel is formed in the center of the spiral water conveying core, and a cooling water channel communicating with the water inlet channel and the spiral drainage groove is formed in the fixing plate; the main runner cylinder plate is communicated with each dish bottom product cavity and each dish cover product cavity through a splitter plate, a plurality of cylinders are arranged in the main runner cylinder plate, and the front end of a cylinder rod of each cylinder is connected with a valve needle for opening and closing runners of each dish bottom product cavity and each dish cover product cavity respectively.

Description

Technical Field

[0001] The invention relates to the field of injection molds, in particular to a double-layer injection mold for a culture dish with spiral water cooling. Background Art

[0002] A petri dish is a laboratory dish used for microorganism or cell culture. It consists of a flat disc-shaped bottom and a lid, and is generally made of glass or plastic. The material of a petri dish is generally plastic or glass. Plastic petri dishes are produced by injection molds. The injection molds of the lid and bottom of existing petri dishes have complex structures, low production efficiency, and high production costs. Summary of the invention

[0003] In view of the above problems, the present invention aims to provide a double-layer injection mold for culture dishes with spiral water cooling, which can simultaneously mold multiple dish covers and dish bottoms on a pair of injection molds and has high injection efficiency.

[0004] The technical solution of the present invention is a double-layer injection mold for a culture dish, comprising a main flow channel cylinder plate located in the center, wherein the left side of the main flow channel cylinder plate is provided with a diverter plate, a cavity plate, a push plate, a core plate and a fixed plate for the bottom of the injection molded dish in sequence from the inside to the outside, and the right side of the main flow channel cylinder plate is provided with a diverter plate, a cavity plate, a push plate, a core plate and a fixed plate for the cover of the injection molded dish in sequence from the inside to the outside, and the left and right fixed plates are respectively connected to the fixed mold and the movable mold of the injection molding machine, and the center of the main flow channel cylinder plate is connected with a feed rod, which extends out after passing through the diverter plate, the cavity plate, the push plate, the core plate and the fixed plate on one side and is connected to the nozzle of the injection molding machine, and the feed rod is provided with a hot runner main channel along its length direction; a plurality of core inserts are provided on the core plate, a plurality of push sleeve inserts are provided on the push plate, and a plurality of cavity inserts are correspondingly provided on the cavity plate, and the core insert, the push sleeve insert on the left side of the main flow channel cylinder plate The components and cavity inserts are combined to form several independent dish bottom product cavities, and the core inserts, push sleeve inserts and cavity inserts on the right side of the main channel cylinder plate are combined to form several independent dish cover product cavities; the surface of the fixed plate is connected with a spiral water transport core, and the spiral water transport core extends into the core insert. The outer side of the spiral water transport core is provided with a spiral drainage groove along the height direction, and the central axis of the spiral water transport core is provided with a water inlet channel. The fixed plate is provided with a cooling water channel, and the cooling water channel and the water inlet channel of the spiral water transport core are connected to realize water inlet, and the cooling water channel and the bottom of the spiral drainage groove are connected to realize drainage; the main channel cylinder plate is connected with each dish bottom product cavity and dish cover product cavity through a diverter plate, and a plurality of cylinders are arranged in the main channel cylinder plate, and the front end of the cylinder rod of each cylinder is connected with a valve needle to open and close the flow channel of each dish bottom product cavity and each dish cover product cavity respectively.

[0005] Preferably, the top surface of the push sleeve insert is radially provided with several exhaust grooves and exhaust holes, the size of the exhaust groove is ≤0.005mm, the inner side of the exhaust groove is located at the bottom of the product cavity, and the outer side of the exhaust groove penetrates the outer side of the push sleeve insert; the top of the core insert is provided with a radially arranged circumferential exhaust groove near the edge of the core, the circumferential exhaust groove is connected with the exhaust hole on the push sleeve insert for exhaust, and the size of the circumferential exhaust groove is ≤0.005mm.

[0006] Preferably, the front and rear positions of the top surface and the front and rear positions of the bottom surface of the main channel cylinder plate are connected to a gear rack, a freely rotatable gear is installed in the gear rack, the front and rear positions of the top surface and the front and rear positions of the bottom surface of the left and right fixed plates are laterally connected to racks, the two corresponding racks on the left and right are respectively meshed with the front and rear side surfaces of the gears, one end of the two racks is connected to the fixed plate on the left, and the other end is connected to the fixed plate on the right, and the remaining suspended length of the rack after passing through the gear rack is greater than the mold opening distance when the mold is opened.

[0007] Preferably, a support block is connected to the middle of the lower surface of the main channel cylinder plate and the diverter plate, a longitudinal support plate is connected below the support block, sliders are connected to the lower surfaces of the front and rear ends of the support plate, and the sliders are installed on two horizontal linear rails on the injection molding machine.

[0008] Preferably, the diagonal positions of the left and right fixed plates are respectively connected with main support guide columns, and the two main support guide columns of the left fixed plate respectively pass through the core plate, push plate, cavity plate, diverter plate, main channel cylinder plate on the left, and the diverter plate, cavity plate, push plate, and core plate on the right in sequence, and then are inserted into the fixed plate on the right; the two main support guide columns of the right fixed plate respectively pass through the core plate, push plate, cavity plate, diverter plate, main channel cylinder plate on the right, and the diverter plate, cavity plate, push plate, and core plate on the left in sequence, and then are inserted into the fixed plate on the left, and all of the above plates are suspended on the four main support guide columns for guidance.

[0009] Preferably, the main channel cylinder plate and the diverter plate, and the diverter plate and the cavity plate are detachably connected into one by bolts, and the upper and lower positions of the front and rear sides of the core plate are connected to ejection cylinders, and the piston rod of the ejection cylinder is inserted into and connected to the push plate.

[0010] Preferably, the front and rear sides of the cavity plate, push plate and core plate are respectively connected with a first guide block, a second guide block and a third guide block, the three guide blocks are sequentially engaged and positioned front to back along the left and right directions and graphite particles are embedded in their respective surfaces for lubrication.

[0011] The invention can simultaneously inject a plurality of culture dish covers and dish bottom products at one time, has high production efficiency and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention in the mold closing state;

[0013] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective;

[0014] Figure 3 It is a schematic diagram of the structure of the present invention in the mold opening state;

[0015] Figure 4 It is a schematic diagram of the structure of the present invention in the ejection state;

[0016] Figure 5 It is a structural schematic diagram of the cylinder and the needle valve in the present invention;

[0017] Figure 6 It is a structural schematic diagram of the waterway in the present invention;

[0018] Figure 7 It is a cross-sectional view of the waterway in the present invention;

[0019] Figure 8 It is a schematic diagram of the structure of the exhaust groove of the product cavity in the present invention;

[0020] Among them: 1-main channel cylinder plate; 2-diverter plate; 3-cavity plate; 31-cavity insert; 32-first guide block; 4-push plate; 41-push sleeve insert; 411-exhaust groove; 412-exhaust hole; 42-second guide block; 5-core plate; 51-core insert; 52-third guide block; 6-fixed plate; 61-cooling water channel; 7-feed rod; 8-hot runner main channel; 9-spiral water transport core; 91-spiral drainage groove; 10-cylinder; 11-valve needle; 12-gear frame; 14-rack; 15-support block; 16-support plate; 17-slider; 18-linear track; 19-main support guide column; 20-ejection cylinder. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] like Figures 1 to 8As shown, the present invention provides a double-layer injection mold for a culture dish, including a main runner cylinder plate 1 located in the center, and a diverter plate 2, a cavity plate 3, a push plate 4, a core plate 5 and a fixed plate 6 for the bottom of the injection molded dish are arranged in sequence from the inside to the outside on the left side of the main runner cylinder plate 1, and a diverter plate 2, a cavity plate 3, a push plate 4, a core plate 5 and a fixed plate 6 for the cover of the injection molded dish are arranged in sequence from the inside to the outside on the right side of the main runner cylinder plate 1, and the left and right fixed plates 6 are respectively connected to the fixed mold and the movable mold of the injection molding machine, and a feed rod 7 is connected to the center of the main runner cylinder plate 1. The feed rod 7 passes through the manifold plate 2, the cavity plate 3, the push plate 4, the core plate 5 and the fixed plate 6 on one side and then extends out and is connected to the injection molding machine nozzle. The feed rod 7 is provided with a hot runner main channel 8 along its length direction; the core plate 5 is provided with a plurality of core inserts 51, the push plate 4 is provided with a plurality of push sleeve inserts 41, and the cavity plate 3 is correspondingly provided with a plurality of cavity inserts 31. The core inserts 51, the push sleeve inserts 41 and the cavity inserts 31 on the left side of the main channel cylinder plate 1 are combined to form a plurality of independent dish bottom product cavities. The main channel cylinder plate 1 on the right side The core insert 51, the push sleeve insert 41, and the cavity insert 31 on the side are combined to form several independent dish cover product cavities; the surface of the fixed plate 6 is connected with a spiral water transport core 9, and the spiral water transport core 9 extends into the core insert 51. The outer side of the spiral water transport core 9 is provided with a spiral drainage groove 91 along the height direction, and the central axis of the spiral water transport core 9 is provided with a water inlet channel. The fixed plate 6 is provided with a cooling water channel 61, and the cooling water channel 61 and the water inlet channel of the spiral water transport core 9 are connected to realize water inlet. The cooling water channel 61 and the bottom of the spiral drainage groove 91 are connected Drainage is achieved through the spiral inlet and outlet of the inserts, so that the cooling water flows quickly and quickly takes away the heat, so that the mold temperature is uniform and moderate, which is more conducive to shortening the product molding cycle, and the cycle is increased from the original 13s to 8s; the main channel cylinder plate 1 is connected to each dish bottom product cavity and dish cover product cavity through the diverter plate 2, and a plurality of cylinders 10 are arranged in the main channel cylinder plate 1. The front end of the cylinder rod of each cylinder 10 is connected with a valve needle 11 to open and close the flow channel of each dish bottom product cavity and each dish cover product cavity respectively.

[0023] On the basis of the above scheme, the top surface of the push sleeve insert 41 is radially provided with several exhaust grooves 411 and exhaust holes 412, the size of the exhaust groove 411 is ≤0.005mm, the inner side of the exhaust groove 411 is located at the bottom of the product cavity, and the outer side 411 of the exhaust groove penetrates the outer side of the push sleeve insert 41; the top of the core insert 51 is provided with a circumferential exhaust groove arranged radially near the edge of the core, and the circumferential exhaust groove is connected with the exhaust hole 412 on the push sleeve insert 41 for exhaust, and the size of the circumferential exhaust groove is ≤0.005mm; so that the melt filling end can be quickly exhausted, the filling pressure is reduced, and the product quality is guaranteed

[0024] In addition, the front and rear positions of the top surface and the front and rear positions of the bottom surface of the main channel cylinder plate 1 are connected to a gear rack 12, and a freely rotatable gear is installed in the gear rack 12. The front and rear positions of the top surface and the front and rear positions of the bottom surface of the left and right fixed plates 6 are transversely connected to a rack 14, and the two corresponding racks 14 on the left and right are respectively meshed with the front and rear side surfaces of the gears. One end of the two racks 14 is connected to the fixed plate 6 on the left, and the other end is connected to the fixed plate 6 on the right. The remaining suspended length of the rack 14 after passing through the gear rack 12 is greater than the mold opening distance when the mold is opened, ensuring that the diverter plate 2, cavity plate 3, push plate 4, core plate 5, fixed plate 6 on the left side of the main channel cylinder plate 1 for injection molding the bottom of the dish and the diverter plate 2, cavity plate 3, push plate 4, core plate 5, fixed plate 6 on the right side for injection molding the cover of the dish maintain a state of synchronous movement during the opening and closing of the mold.

[0025] In addition, a support block 15 is connected to the middle position of the lower surface of the main channel cylinder plate 1 and the diverter plate 2, and a longitudinal support plate 16 is connected below the support block 15. Sliders 17 are connected to the lower surfaces of the front and rear ends of the support plate 16. The slides 17 are installed on two horizontal linear rails 18 on the injection molding machine. The support block 15 and the support plate 16 are used to bear the weight and move the entire mold on the linear rail 18.

[0026] Specifically, the diagonal positions of the left and right fixed plates 6 are respectively connected with main support guide columns 19, and the two main support guide columns 19 of the left fixed plate 6 respectively pass through the core plate 5, push plate 4, cavity plate 3, diverter plate 2, main channel cylinder plate 1 on the left, and the diverter plate 2, cavity plate 3, push plate 4, and core plate 5 on the right in sequence, and then are inserted into the right fixed plate 6; the two main support guide columns 19 of the right fixed plate 6 respectively pass through the core plate 5, push plate 4, cavity plate 3, diverter plate 2, main channel cylinder plate 1 on the right, and the diverter plate 2, cavity plate 3, push plate 4, and core plate 5 on the left in sequence, and then are inserted into the left fixed plate 6, and all the above-mentioned plates are suspended on the four main support guide columns 19 for guidance, so as to ensure the concentricity and stability of all plates when opening the mold.

[0027] In addition, the main channel cylinder plate 1 and the manifold plate 2, and the manifold plate 2 and the cavity plate 3 are detachably connected into one by bolts, and the upper and lower positions of the front and rear sides of the core plate 5 are connected to the ejection cylinder 20, and the piston rod of the ejection cylinder 20 is inserted into and connected to the push plate 4. The above five plates maintain an integrated structure during the opening and closing process of the mold.

[0028] Furthermore, the front and rear sides of the cavity plate 3, the push plate 4 and the core plate 5 are respectively connected with a first guide block 32, a second guide block 42 and a third guide block 52. The three guide blocks are sequentially engaged and positioned in the front and rear directions along the left and right directions, and graphite particles are embedded in their respective surfaces for lubrication, thereby ensuring accurate mold closing of the three plates during mold closing.

[0029] The working principle of the present invention is as follows:

[0030] After the mold is closed, the injection molding machine injects the molten raw material into the main channel cylinder plate 1 through the hot runner main channel 8 of the feed rod 7, and then diverts it through the diverter plate 2 and injects it into each product cavity for filling and injection molding. The cylinder 10 in the main channel cylinder plate 1 controls the opening or closing of the feed channel of each product through the valve needle 11 to achieve precise control of the feeding of each product cavity. During the injection molding process, the bottom of the product cavity is quickly vented through the exhaust groove 411 and the exhaust hole 511, which improves the injection molding efficiency and ensures the product quality. After the injection molding is completed, the mold is opened, and the cavity plate 3, push plate 4, core plate 5, and fixed plate 6 on both sides are synchronized and symmetrically moved through the gear rack meshing structure at the top and bottom. When demolding, the push plate 4 is pushed by the ejection cylinder 20 to eject the molded dish cover product and dish bottom product. The product is automatically taken out by the robot and the mold is closed again, and then the next injection molding is continued.

[0031] The above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the invention. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A double-layer injection mold for culture dishes, Features: The invention comprises a main flow channel cylinder plate (1) located in the center, wherein the left side of the main flow channel cylinder plate (1) is provided with a diverter plate (2), a cavity plate (3), a push plate (4), a core plate (5) and a fixed plate (6) for the bottom of the injection molding dish in sequence from the inside to the outside, and the right side of the main flow channel cylinder plate (1) is provided with a diverter plate (2), a cavity plate (3), a push plate (4), a core plate (5) and a fixed plate (6) for the cover of the injection molding dish in sequence from the inside to the outside, and the left and right fixed plates (6) are respectively connected to the fixed mold and the movable mold of the injection molding machine, and the center of the main flow channel cylinder plate (1) is connected to a feed The feed rod (7) extends through the manifold plate (2), the cavity plate (3), the push plate (4), the core plate (5) and the fixed plate (6) on one side and is connected to the injection molding machine nozzle. The feed rod (7) is provided with a hot runner main channel (8) along its length direction. The core plate (5) is provided with a plurality of core inserts (51), the push plate (4) is provided with a plurality of push sleeve inserts (41), the cavity plate (3) is correspondingly provided with a plurality of cavity inserts (31), the core insert (51) and the push sleeve insert (41) on the left side of the main channel cylinder plate (1) , the cavity inserts (31) are combined to form a plurality of independent dish bottom product cavities, the core inserts (51) on the right side of the main channel cylinder plate (1), the push sleeve inserts (41), and the cavity inserts (31) are combined to form a plurality of independent dish cover product cavities; the surface of the fixed plate (6) is connected with a spiral water transport core (9), the spiral water transport core (9) extends into the core inserts (51), the outer side surface of the spiral water transport core (9) is provided with a spiral drainage groove (91) along the height direction, the central axial direction of the spiral water transport core (9) is provided with a water inlet channel, and the fixed plate (6) is provided with A cooling water channel (61) is provided, wherein the cooling water channel (61) is connected to a water inlet channel of a spiral water transport core (9) to achieve water inlet, and the cooling water channel (61) is connected to the bottom of a spiral drainage groove (91) to achieve drainage; the main channel cylinder plate (1) is connected to each of the bottom product cavities and the cover product cavities through a diverter plate (2); a plurality of cylinders (10) are arranged in the main channel cylinder plate (1); a valve needle (11) is connected to the front end of the cylinder rod of each cylinder (10) to open and close the flow channel of each bottom product cavity and each cover product cavity.

2. A double-layer injection mold for a culture dish according to claim 1, Features: The top surface of the push sleeve insert (41) is provided with a plurality of exhaust grooves (411) and exhaust holes (412) along the radial direction, the size of the exhaust groove (411) is ≤0.005 mm, the inner side of the exhaust groove (411) is located at the bottom of the product cavity, and the outer side of the exhaust groove (411) penetrates the outer side of the push sleeve insert (41). The top of the core insert (51) is provided with a circumferential exhaust groove arranged along the radial direction near the edge of the core, the circumferential exhaust groove is connected to the exhaust hole (412) on the push sleeve insert (41) for exhaust, and the size of the circumferential exhaust groove is ≤0.005 mm.

3. A double-layer injection mold for a culture dish according to claim 1, Features: The front and rear positions of the top surface and the front and rear positions of the bottom surface of the main channel cylinder plate (1) are both connected to a gear rack (12), and a freely rotatable gear is installed in the gear rack (12). The front and rear positions of the top surface and the front and rear positions of the bottom surface of the left and right fixed plates (6) are both laterally connected to a rack (14), and the two corresponding racks (14) on the left and right are respectively meshed with the front and rear side surfaces of the gears. One end of the two racks (14) is connected to the left fixed plate (6), and the other end is connected to the right fixed plate (6). The remaining hanging length of the rack (14) after passing through the gear rack (12) is greater than the mold opening distance when the mold is opened.

4. A double-layer injection mold for a culture dish according to claim 1, Features: A support block (15) is connected to the middle of the lower surface of the main channel cylinder plate (1) and the diverter plate (2), a longitudinal support plate (16) is connected below the support block (15), and sliders (17) are connected to the lower surfaces of the front and rear ends of the support plate (16), and the sliders (17) are installed on two transverse linear rails (18) on the injection molding machine.

5. A double-layer injection mold for a culture dish according to claim 1, Features: The diagonal positions of the left and right fixed plates (6) are respectively connected with main support guide pillars (19). The two main support guide pillars (19) of the left fixed plate (6) respectively pass through the left core plate (5), push plate (4), cavity plate (3), splitter plate (2), main channel cylinder plate (1), the right splitter plate (2), cavity plate (3), push plate (4), and core plate (5) in sequence, and then are inserted into the right fixed plate (6); the two main support guide pillars (19) of the right fixed plate (6) respectively pass through the right core plate (5), push plate (4), cavity plate (3), splitter plate (2), main channel cylinder plate (1), the left splitter plate (2), cavity plate (3), push plate (4), and core plate (5) in sequence, and then are inserted into the left fixed plate (6). All the above plates are suspended on the four main support guide pillars (19) for guidance.

6. A double-layer injection mold for a culture dish according to claim 1, Features: The main channel cylinder plate (1) and the manifold plate (2), and the manifold plate (2) and the cavity plate (3) are detachably connected to form an integral whole via bolts; the upper and lower positions of the front and rear sides of the core plate (5) are connected to ejection cylinders (20); the piston rod of the ejection cylinder (20) penetrates into and is connected to the push plate (4).

7. A double-layer injection mold for a culture dish according to claim 1, Features: The cavity plate (3), the push plate (4) and the core plate (5) are respectively connected to the front and rear side surfaces thereof with a first guide block (32), a second guide block (42) and a third guide block (52); the three guide blocks are sequentially engaged and positioned in a front-to-back direction along the left-right direction and graphite particles are embedded in their respective surfaces for lubrication.

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