A high precision injection mold

Abstract

The present invention relates to the technical field of injection molds, and specifically to a high-precision injection mold, comprising an upper mold base and a lower mold base, and also comprising a molding plate; a U-shaped plate is fixedly connected inside the lower mold base, the molding plate is located inside the U-shaped plate, a molding groove is provided on the upper surface of the molding plate facing downward, a first rack is fixedly connected to the bottom of the molding plate, the first rack is meshed with a gear, the gear is rotatably connected inside the U-shaped plate, the gear is also meshed with a second rack, the second rack is elastically connected inside the U-shaped plate, a cooling box is fixedly connected to the second rack, and the cooling boxes are respectively located on both sides of the molding plate; a cooling cavity for containing a coolant is provided inside the cooling box, and the present invention facilitates the bursting of bubbles in the injection molding solution before the injection molding solution flows into the molding groove, and at the same time facilitates the cooling and heat dissipation of the molding plate.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to a high-precision injection mold. Background Art

[0002] Injection molds are tools for producing plastic products; they are also tools that give plastic products complete structures and precise dimensions. Injection molding is a processing method used in the mass production of certain parts with complex shapes. Specifically, it refers to the high-pressure injection of heated and melted plastic into the mold cavity by the injection molding machine, and after cooling and solidification, a molded product is obtained. However, when the existing high-precision injection molds inject the injection solution into the molding groove, the air molding part is naturally cooled during the injection molding process. Therefore, it takes a long time for the solution to solidify, which prolongs the processing time of the injection molded product and reduces work efficiency. At the same time, the position of the molding liquid poured in the molding groove cannot be changed by the staff, which is not conducive to the flow of nearby air, that is, the heat dissipation effect is poor, which brings inconvenience to the staff. Summary of the invention

[0003] The object of the present invention is to provide a high-precision injection mold to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A high-precision injection mold, comprising an upper mold base and a lower mold base, and also comprising a molding plate;

[0006] A U-shaped plate is fixedly connected in the lower die base, the forming plate is located in the U-shaped plate, a forming groove is opened downward on the upper surface of the forming plate, a first rack is fixedly connected to the bottom of the forming plate, the first rack is meshed with a gear, the gear is rotatably connected in the U-shaped plate, the gear is also meshed with a second rack, the second rack is elastically connected in the U-shaped plate, a cooling box is fixedly connected to the second rack, and the cooling boxes are respectively located on both sides of the forming plate;

[0007] A cooling chamber for containing coolant is provided in the cooling box, a heat conducting plate and a baffle are fixedly connected in the cooling chamber, ventilation holes are provided on the baffle, a shielding plate is movably connected in the baffle, a through hole is provided on the shielding plate, the shielding plate is elastically connected to the cooling box, and a push block is fixedly connected to the shielding plate.

[0008] As a further solution of the present invention: a rotating shaft is rotatably connected inside the U-shaped plate, and the rotating shaft is fixedly connected to the gear;

[0009] A slide plate is fixedly connected to the second rack, a first slide groove is provided on the U-shaped plate, the slide plate is slidably connected in the first slide groove, a first spring is fixedly connected to the slide plate, and the first spring is fixedly connected to the U-shaped plate.

[0010] As a further solution of the present invention: a second spring is fixedly connected to the cooling box, and the second spring is fixedly connected to the push block;

[0011] A support plate is fixedly connected inside the U-shaped plate, and the support plate is located below the forming plate.

[0012] As a further solution of the present invention: a fixing frame is arranged above the forming plate, a liquid baffle plate is fixedly connected to the interior of the fixing frame, a liquid outlet hole is opened on the liquid baffle plate, and the lower port diameter of the liquid outlet hole is smaller than the upper port diameter.

[0013] As a further solution of the present invention: a limiting block is fixedly connected to the fixing frame, and a limiting groove matching with the limiting block is formed on the forming plate.

[0014] As a further solution of the present invention: a fixing rod is fixedly connected to the fixing frame, a second slide groove is provided on the fixing rod, a slider is slidably connected in the second slide groove, both ends of the slider are fixedly connected to a third spring, one end of the third spring is fixedly connected to the side wall of the second slide groove, a connecting rod is fixedly connected to the slider, a bubble breaking block is fixedly connected to the bottom of the connecting rod, and the bubble breaking block is located in the liquid outlet hole and is arranged corresponding to the liquid outlet hole.

[0015] As a further solution of the present invention: a carrying plate is arranged below the lower mold base, the left and right ends of the carrying plate are rotatably connected to a rotating rod, a clamping block is fixedly connected to the rotating rod, both ends of the rotating rod are fixedly connected to a rotating shaft, a winding wheel is fixedly connected to the rotating shaft, a rope is wound around the winding wheel, one end of the rope is fixedly connected to a movable plate, and a loading plate is fixedly connected to the movable plate.

[0016] As a further solution of the present invention: one end of one of the rotating shafts passes through the supporting plate and is fixedly connected to a rotating block, a fourth spring is fixedly connected to the rotating block, a pull plate is fixedly connected to the fourth spring, an insertion rod is fixedly connected to the pull plate, one end of the insertion rod passes through the rotating block and is inserted on the supporting plate.

[0017] As a further solution of the present invention: a receiving groove is provided on the bearing plate, the movable plate is movably connected in the receiving groove, a second spring is fixedly connected in the receiving groove, and the second spring is fixedly connected to the movable plate.

[0018] As a further solution of the present invention: the accommodating groove includes a first accommodating interval and a second accommodating interval, the second accommodating interval is located above the second accommodating interval, and the horizontal length value of the second accommodating interval is greater than the horizontal length value of the second accommodating interval.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] By arranging a molding plate and a cooling box in the U-shaped plate, it is convenient to realize cooling and heat dissipation treatment of the molding plate through the cooling box. When the injection molding solution flows into the molding groove of the molding plate, the molding plate moves downward due to the gravity of the injection molding solution, thereby realizing the downward movement of the first rack. Since the two ends of the gear are respectively engaged with the first rack and the second rack, the second rack moves upward through the gear during the downward movement of the first rack, and then the cooling box moves upward through the slide plate. In the process of the molding plate moving downward and the cooling box moving upward, it is convenient to realize the cooling effect of the molding plate through the cooling box. At the same time, in the process of the molding plate moving downward and the cooling box moving upward, the push block moves downward, and in the process of the push block moving downward, the shielding plate moves downward. When the through hole on the shielding plate corresponds to the ventilation hole on the baffle, it is convenient to realize the cooling effect of the molding plate through the cooling box.

[0021] By arranging a bubble-breaking block in the liquid outlet hole of the liquid baffle plate, it is convenient to break the bubbles contained in the injection molding solution. The staff pours the injection molding liquid into the upper surface of the liquid baffle plate. Since the slider is connected to the second slide groove through the third spring, it is convenient to realize the bubble-breaking block to move in the liquid outlet hole when the injection molding solution flows in the liquid outlet hole in the liquid baffle plate, so it is convenient to break the bubbles in the injection molding solution in the liquid outlet hole. At the same time, since the diameter value of the lower port of the liquid outlet hole is smaller than the diameter value of the upper port, it is convenient for the bubbles in the liquid to break when the liquid flows into the liquid outlet hole.

[0022] By arranging a carrying plate under the lower die base, the carrying plate supports the lower die base, and the staff manually rotates the rotating shaft, and the rotating rod rotates during the rotation of the rotating shaft. During the rotation of the rotating rod, the clamping block clamps the bottom of the lower die base, and the winding wheel rotates during the rotation of the rotating shaft, so that one end of the rope is relaxed, and the movable plate moves due to the elastic force of the second spring, and moves in the accommodating groove during the movement of the movable plate. During the movement of the movable plate in the accommodating groove, the movable plate is lifted upward, and the bottom of the lower die base is supported by the loading plate.

[0023] This high-precision injection mold is convenient for bursting bubbles in the injection molding solution before the injection molding solution flows into the molding groove, and is also convenient for cooling and dissipating the heat of the molding plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of a high-precision injection mold;

[0025] Figure 2 A schematic diagram of a high-precision injection mold with the upper mold base removed;

[0026] Figure 3 It is a schematic diagram of the interior of a U-shaped plate, a molding plate and a cooling box in a high-precision injection mold;

[0027] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0028] Figure 5 for Figure 3 A partial enlarged view of point B in the middle;

[0029] Figure 6 It is a schematic diagram of the interior of a carrier plate in a high-precision injection mold;

[0030] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0031] Figure 8 A schematic side view of a carrier plate in a high-precision injection mold;

[0032] Fig. 9 A schematic diagram of a receiving groove and a movable plate in a high-precision injection mold.

[0033] In the figure: 1, upper die base; 2, lower die base; 3, forming plate; 4, U-shaped plate; 5, forming groove; 6, first rack; 7, gear; 8, second rack; 9, cooling box; 10, cooling chamber; 11, heat conduction plate; 12, baffle; 13, ventilation hole; 14, shielding plate; 15, through hole; 16, push block; 17, rotating shaft; 18, slide plate; 19, first slide groove; 20, first spring; 21, second spring; 22, support plate; 23, fixed frame; 24 , liquid baffle plate; 25, liquid outlet; 26, fixed rod; 27, second slide groove; 28, slider; 29, third spring; 30, connecting rod; 31, bubble breaking block; 32, load-bearing plate; 33, rotating plate; 34, pressing block; 35, rotating shaft; 36, winding wheel; 37, rope; 38, movable plate; 39, loading plate; 40, rotating block; 41, fourth spring; 42, pulling plate; 43, plugging rod; 44, receiving groove; 45, fifth spring; 46, limit block. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-9 In an embodiment of the present invention, a high-precision injection mold includes an upper mold base 1 and a lower mold base 2, and also includes a molding plate 3;

[0036] A U-shaped plate 4 is fixedly connected inside the lower die base 2, the forming plate 3 is located inside the U-shaped plate 4, a forming groove 5 is opened downward on the upper surface of the forming plate 3, a first rack 6 is fixedly connected to the bottom of the forming plate 3, the first rack 6 is meshed with a gear 7, the gear 7 is rotatably connected inside the U-shaped plate 4, the gear 7 is also meshed with a second rack 8, the second rack 8 is elastically connected inside the U-shaped plate 4, a cooling box 9 is fixedly connected to the second rack 8, and the cooling boxes 9 are respectively located on both sides of the forming plate 3;

[0037] A cooling chamber 10 for containing coolant is provided in the cooling box 9, a heat conducting plate 11 and a baffle 12 are fixedly connected in the cooling chamber 10, a ventilation hole 13 is provided on the baffle 12, a shielding plate 14 is movably connected in the baffle 12, a through hole 15 is provided on the shielding plate 14, the shielding plate 14 is elastically connected to the cooling box 9, and a push block 16 is fixedly connected to the shielding plate 14.

[0038] A rotating shaft 17 is rotatably connected in the U-shaped plate 4, and the rotating shaft 17 is fixedly connected to the gear 7. The setting of the rotating shaft 17 facilitates the rotatable connection of the gear 7 in the U-shaped plate 4.

[0039] A slide plate 18 is fixedly connected to the second rack 8, a first slide groove 19 is provided on the U-shaped plate 4, the slide plate 18 is slidably connected in the first slide groove 19, a first spring 20 is fixedly connected to the slide plate 18, and the first spring 20 is fixedly connected to the U-shaped plate 4. The setting of the first slide groove 19 facilitates the sliding connection of the slide plate 18 in the U-shaped plate 4, and the setting of the first spring 20 facilitates the reset movement of the slide plate 18.

[0040] The cooling box 9 is fixedly connected with a second spring 21, which is fixedly connected with the push block 16. The second spring 21 is arranged to facilitate the reset movement of the push block 16.

[0041] A support plate 22 is fixedly connected inside the U-shaped plate 4 . The support plate 22 is located below the forming plate 3 . When the forming plate 3 moves downward, the support plate 22 supports the forming plate 3 .

[0042] A fixed frame 23 is arranged above the molding plate 3, and a liquid baffle plate 24 is fixedly connected to the interior of the fixed frame 23. A liquid outlet 25 is opened on the liquid baffle plate 24, and the diameter value of the lower port of the liquid outlet hole 25 is smaller than the diameter value of the upper port. The staff injects the liquid to be injected into the upper surface of the liquid baffle plate 24. The setting of the liquid outlet hole 25 facilitates the liquid to flow from the liquid baffle plate 24 to the molding groove 5. Since the diameter value of the lower port of the liquid outlet hole 25 is smaller than the diameter value of the upper port, it is convenient for bubbles in the liquid to burst when the liquid flows into the liquid outlet hole 25.

[0043] A limiting block 46 is fixedly connected to the fixed frame 23, and a limiting groove matching with the limiting block 46 is opened on the forming plate 3. When the staff places the fixed frame 23 on the forming plate 3, the limiting block 46 is located in the limiting groove, thereby achieving a limiting effect on the fixed frame 23.

[0044] A fixing rod 26 is fixedly connected to the fixing frame 23, and a second slide groove 27 is provided on the fixing rod 26. A slider 28 is slidably connected in the second slide groove 27. Both ends of the slider 28 are fixedly connected to a third spring 29, and one end of the third spring 29 is fixedly connected to the side wall of the second slide groove 27. A connecting rod 30 is fixedly connected to the slider 28, and a bubble breaking block 31 is fixedly connected to the bottom of the connecting rod 30. The bubble breaking block 31 is located in the liquid outlet 25 and is arranged corresponding to the liquid outlet 25. The staff pours the injection liquid into the upper surface of the liquid baffle plate 24. Since the slider 28 is connected to the second slide groove 27 through the third spring 29, it is convenient to realize the bubble breaking block 31 to move in the liquid outlet 25 when the injection solution flows in the liquid outlet 25 in the liquid baffle plate 24, so it is convenient to realize the breaking of bubbles in the injection solution in the liquid outlet 25.

[0045] A carrying plate 32 is provided below the lower mold base 2, and the left and right ends of the carrying plate 32 are rotatably connected to a rotating rod 33, and a clamping block 34 is fixedly connected to the rotating rod 33. Both ends of the rotating rod 33 are fixedly connected to a rotating shaft 35, and a winding wheel 36 is fixedly connected to the rotating shaft 35. A rope 37 is wound around the winding wheel 36, and one end of the rope 37 is fixedly connected to a movable plate 38, and a loading plate 39 is fixedly connected to the movable plate 38.

[0046] One end of one of the rotating shafts 35 passes through the supporting plate 32 and is fixedly connected to the rotating block 40, to which is fixedly connected a fourth spring 41, to which a pull plate 42 is fixedly connected, to which an insertion rod 43 is fixedly connected, one end of the insertion rod 43 passes through the rotating block 40 and is inserted on the supporting plate 32. When it is necessary to rotate the rotating shaft 35, the staff manually pulls the pull plate 42 to move the insertion rod 43 through the pull plate 42. When one end of the insertion rod 43 is detached from the supporting plate 32, the rotating shaft 35 can be manually rotated to drive the clamping block 34 to move through the rotating shaft 35. Then the pull plate 42 is manually released. Due to the action of the fourth spring 41, the pull plate 42 moves. When one end of the insertion rod 43 is inserted on the supporting plate 32, the rotating shaft 35 is locked.

[0047] A receiving groove 44 is provided on the supporting plate 32, and the movable plate 38 is movably connected in the receiving groove 44. A second spring 45 is fixedly connected in the receiving groove 44, and the second spring 45 is fixedly connected to the movable plate 38. The staff manually rotates the rotating shaft 35, and the rotating rod 33 rotates during the rotation of the rotating shaft 35. During the rotation of the rotating rod 33, the clamping block 34 clamps the bottom of the lower mold base 2. At the same time, the winding wheel 36 rotates during the rotation of the rotating shaft 35, so that one end of the rope 37 is relaxed. Due to the elastic force of the second spring 45, the movable plate 38 is moved, and the movable plate 38 moves in the receiving groove 44 during the movement. During the movement of the movable plate 38 in the receiving groove 44, the movable plate 38 is lifted upward, and the supporting function of the bottom of the lower mold base 2 is realized through the loading plate 39.

[0048] The accommodating groove 44 includes a first accommodating interval and a second accommodating interval. The second accommodating interval is located above the first accommodating interval, and the horizontal length value of the second accommodating interval is greater than the horizontal length value of the second accommodating interval, so that the movable plate 38 can move upward in the accommodating groove 44 when moving in the accommodating groove 44.

[0049] When the present invention is in use, the staff manually rotates the rotating shaft 35, and the rotating rod 33 rotates during the rotation of the rotating shaft 35. During the rotation of the rotating rod 33, the clamping block 34 clamps the bottom of the lower mold base 2. At the same time, during the rotation of the rotating shaft 35, the winding wheel 36 rotates, so that one end of the rope 37 is relaxed. Due to the elastic force of the second spring 45, the movable plate 38 moves, and during the movement of the movable plate 38, it moves in the accommodating groove 44. During the movement of the movable plate 38 in the accommodating groove 44, the movable plate 38 is lifted upward, and the supporting effect on the bottom of the lower mold base 2 is achieved through the loading plate 39.

[0050] The staff moves the upper mold base 1 away from the top of the lower mold base 2, and inserts the limit block 46 into the limit groove of the molding plate 3, so as to limit the fixed frame 23 on the molding plate 3. The staff pours the injection liquid into the upper surface of the liquid baffle plate 24. Since the slider 28 is connected to the second slide groove 27 through the third spring 29, it is convenient for the bubble breaking block 31 to move in the liquid outlet 25 when the injection solution flows in the liquid outlet 25 in the liquid baffle plate 24, so it is convenient to break the bubbles in the injection solution in the liquid outlet 25.

[0051] At the same time, since the diameter of the lower port of the liquid outlet hole 25 is smaller than the diameter of the upper port, it is convenient for bubbles in the liquid to burst when the liquid flows into the liquid outlet hole 25 .

[0052] When the injection molding solution flows into the molding groove 5 of the molding plate 3, the molding plate 3 moves downward due to the gravity of the injection molding solution, thereby realizing the downward movement of the first rack 6. Since the two ends of the gear 7 are respectively meshed with the first rack 6 and the second rack 8, the second rack 8 moves upward through the gear 7 during the downward movement of the first rack 6, and then the cooling box 9 moves upward through the slide plate 18. In the process of the molding plate 3 moving downward and the cooling box 9 moving upward, it is convenient to realize the cooling effect on the molding plate 3 through the cooling box 9.

[0053] At the same time, when the forming plate 3 moves downward and the cooling box 9 moves upward, the push block 16 moves downward, and when the push block 16 moves downward, the shielding plate 14 moves downward. When the through hole 15 on the shielding plate 14 corresponds to the ventilation hole 13 on the baffle 12, the cooling box 9 facilitates the cooling of the forming plate 3.

[0054] At the same time, the forming plate 3 descends into the U-shaped plate 4 , and the U-shaped plate 4 provides protection for the forming plate 3 .

[0055] The "fixed connection" described in the present invention means that the two interconnected parts are fixed together, generally by welding, screws or gluing; "rotational connection" means that the two parts are connected together and can move relative to each other.

[0056] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0057] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A high-precision injection mold, comprising an upper mold base (1) and a lower mold base (2), characterized in that: Also includes a forming plate (3); A U-shaped plate (4) is fixedly connected inside the lower die base (2), the forming plate (3) is located inside the U-shaped plate (4), a forming groove (5) is provided on the upper surface of the forming plate (3) facing downward, a first rack (6) is fixedly connected to the bottom of the forming plate (3), the first rack (6) is meshed with a gear (7), the gear (7) is rotatably connected inside the U-shaped plate (4), the gear (7) is also meshed with a second rack (8), the second rack (8) is elastically connected inside the U-shaped plate (4), a cooling box (9) is fixedly connected to the second rack (8), and the cooling boxes (9) are respectively located on both sides of the forming plate (3); The cooling box (9) is provided with a cooling chamber (10) for containing a coolant, a heat conducting plate (11) and a baffle (12) are fixedly connected in the cooling chamber (10), a ventilation hole (13) is provided on the baffle (12), a shielding plate (14) is movably connected in the baffle (12), a through hole (15) is provided on the shielding plate (14), the shielding plate (14) is elastically connected to the cooling box (9), and a push block (16) is fixedly connected to the shielding plate (14); A fixing frame (23) is arranged above the forming plate (3), a liquid baffle plate (24) is fixedly connected to the interior of the fixing frame (23), a liquid outlet hole (25) is provided on the liquid baffle plate (24), and a lower port diameter value of the liquid outlet hole (25) is smaller than an upper port diameter value; The fixing frame (23) is fixedly connected with a fixing rod (26), the fixing rod (26) is provided with a second slide groove (27), a slider (28) is slidably connected in the second slide groove (27), both ends of the slider (28) are fixedly connected with a third spring (29), one end of the third spring (29) is fixedly connected to the side wall of the second slide groove (27), the slider (28) is fixedly connected with a connecting rod (30), the bottom of the connecting rod (30) is fixedly connected with a bubble breaking block (31), the bubble breaking block (31) is located in the liquid outlet hole (25) and is arranged corresponding to the liquid outlet hole (25); A rotating shaft (17) is rotatably connected inside the U-shaped plate (4), and the rotating shaft (17) is fixedly connected to the gear (7); A slide plate (18) is fixedly connected to the second rack (8), a first slide groove (19) is provided on the U-shaped plate (4), the slide plate (18) is slidably connected in the first slide groove (19), a first spring (20) is fixedly connected to the slide plate (18), and the first spring (20) is fixedly connected to the U-shaped plate (4); A second spring (21) is fixedly connected to the cooling box (9), and the second spring (21) is fixedly connected to the push block (16); A support plate (22) is fixedly connected inside the U-shaped plate (4), and the support plate (22) is located below the forming plate (3); The fixing frame (23) is fixedly connected with a limiting block (46), and the forming plate (3) is provided with a limiting groove matched with the limiting block (46); A carrying plate (32) is arranged below the lower die base (2), and the left and right ends of the carrying plate (32) are rotatably connected to a rotating rod (33), and a pressing block (34) is fixedly connected to the rotating rod (33), and both ends of the rotating rod (33) are fixedly connected to a rotating shaft (35), and a winding wheel (36) is fixedly connected to the rotating shaft (35), and a rope (37) is wound around the winding wheel (36), and one end of the rope (37) is fixedly connected to a movable plate (38), and a carrier plate (39) is fixedly connected to the movable plate (38).

2. A high-precision injection mold according to claim 1, characterized in that: One end of one of the rotating shafts (35) passes through the bearing plate (32) and is fixedly connected to a rotating block (40), a fourth spring (41) is fixedly connected to the rotating block (40), a pulling plate (42) is fixedly connected to the fourth spring (41), an insertion rod (43) is fixedly connected to the pulling plate (42), and one end of the insertion rod (43) passes through the rotating block (40) and is inserted into the bearing plate (32).

3. A high-precision injection mold according to claim 2, characterized in that: The bearing plate (32) is provided with a receiving groove (44), the movable plate (38) is movably connected in the receiving groove (44), a fifth spring (45) is fixedly connected in the receiving groove (44), and the fifth spring (45) is fixedly connected to the movable plate (38).

4. A high-precision injection mold according to claim 3, characterized in that: The accommodating groove (44) comprises a first accommodating section and a second accommodating section, wherein the second accommodating section is located above the second accommodating section, and the horizontal length of the second accommodating section is greater than the horizontal length of the second accommodating section.

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