A molding injection mold for dumbbell processing

Abstract

The present invention belongs to the technical field of dumbbell processing injection molds, and specifically refers to a dumbbell processing molding injection mold, including a guide bolt, an injection mold, a closing nut, a speed-controlling heat flow mechanism and a speed-detecting defoaming mechanism, the injection mold is symmetrically arranged at both ends of the guide bolt, the injection mold is slidingly arranged on the outside of the guide bolt, the closing nut is arranged at one end of the guide bolt away from the injection mold, the closing nut is threadedly connected to the guide bolt, the speed-controlling heat flow mechanism is arranged on the injection mold, the speed-detecting defoaming mechanism is arranged at both ends of the injection mold, and the speed-detecting defoaming mechanism includes an exhaust mechanism, a voltage stabilizing mechanism, a flow detection mechanism and an air extraction mechanism. The present invention provides a dumbbell processing molding injection mold that can discharge the gas inside the mold at a constant pressure, and through the setting of a double exhaust channel, the gas can be discharged before the plastic is solidified, and the injection speed of the raw material can be accurately controlled according to the gas flow discharged from the inside of the plastic.

Description

Technical Field

[0001] The invention belongs to the technical field of dumbbell processing injection molds, and specifically refers to a forming injection mold for dumbbell processing. Background Art

[0002] Dumbbells are an auxiliary equipment for weightlifting and fitness exercises. Because they are easy to use and take up little space, they are increasingly favored by fitness enthusiasts. Dumbbells have a handle with a dumbbell head at both ends. When in use, the handle is held with one hand, and the purpose of exercise or weight training is achieved by repeatedly moving the arm muscles.

[0003] The existing dumbbell molding injection molds have the following problems:

[0004] The existing dumbbell molding injection mold has poor venting, which results in the gas in the mold being unable to be discharged in time during the injection molding process, thereby forming bubbles in the plastic. In addition, the traditional injection mold does not have the ability to control the injection speed of the injection molding material, resulting in a large number of bubbles inside the injection molding material due to the injection speed, thereby affecting the overall strength of the product after molding. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present solution provides a molding injection mold for dumbbell processing that can discharge the gas inside the mold at a constant pressure. Through the setting of dual exhaust channels, the gas can be discharged before the plastic solidifies, and the injection speed of the raw material can be accurately controlled according to the gas flow rate discharged from the plastic.

[0006] The technical scheme adopted in this scheme is as follows: This scheme proposes a molding injection mold for dumbbell processing, including a guide bolt, an injection mold, a closing nut, a speed-controlling heat flow mechanism and a speed-detecting defoaming mechanism. The injection mold is symmetrically arranged at both ends of the guide bolt, and the injection mold is slidingly arranged on the outside of the guide bolt. The closing nut is arranged at the end of the guide bolt away from the injection mold, and the closing nut is threadedly connected to the guide bolt. The speed-controlling heat flow mechanism is arranged on the injection mold, and the speed-detecting defoaming mechanism is arranged at both ends of the injection mold. The speed-detecting defoaming mechanism includes an exhaust mechanism, a pressure stabilizing mechanism, a flow detection mechanism and an air extraction mechanism. The exhaust mechanism is arranged on the upper wall of the injection mold, the pressure stabilizing mechanism is arranged at the end of the exhaust mechanism away from the injection mold, the flow detection mechanism is arranged at the end of the pressure stabilizing mechanism away from the exhaust mechanism, and the air extraction mechanism is arranged between the flow detection mechanisms.

[0007] As a further preferred embodiment of the present invention, the speed-controlling heat flow mechanism includes a dumbbell head groove, an injection molding tube, an insulation tank, a speed control valve, an injection molding groove and a dumbbell bar groove. The dumbbell head groove is symmetrically arranged on the side wall of the injection mold, the injection mold is open at one end, and the dumbbell head grooves are relatively arranged. The injection molding groove is arranged on a side of the injection mold close to the dumbbell head groove, and the injection molding groove is open on three sides. The injection molding tube is arranged inside the injection molding groove arranged on the side wall of the injection mold at one end of the guide bolt. The insulation tank is connected to the side of the injection molding tube away from the injection molding groove, and the insulation tank is open at the upper end. The speed control valve is connected to one end of the injection molding tube close to the insulation tank. The dumbbell bar groove is arranged on the side wall of the injection mold between the dumbbell head grooves, and the dumbbell bar groove is open on three sides. The dumbbell bar groove is connected to the dumbbell head groove, and the injection molding groove is connected to the dumbbell bar groove.

[0008] When in use, in the initial state, the injection molds are respectively located at both ends of the guide bolt. When the dumbbell needs to be injection molded, the injection molds at both ends of the guide bolt are pushed to move, and the injection molds slide along the guide bolt to drive the dumbbell head slot and the dumbbell bar slot to move relative to each other. The injection molds fit each other, and the dumbbell head slots and the dumbbell bar slots are combined to form an injection cavity for the dumbbell. The injection slot is engaged with the outside of the injection tube, and then the closing nut is rotated, and the closing nut rotates along the guide bolt and fits the side wall of the injection mold. The injection mold changes from an active state to a fixed state, the speed control valve is in a closed state, the insulation tank and the injection tube are blocked and cut off, and injection of the same volume as the two sets of dumbbell head slots is added into the insulation tank. The insulation tank heats the injection molding raw material added thereto to maintain the injection temperature of the injection molding raw material, opens the speed control valve, and connects the injection molding tube and the insulation tank. The injection molding raw material inside the insulation tank flows into the dumbbell bar groove through the injection molding tube, and the injection molding raw material inside the dumbbell bar groove flows into the dumbbell head groove to both ends. The space between the dumbbell bar grooves is smaller than the space between the dumbbell head grooves. As the cavity formed between the dumbbell bar grooves is filled with the injection molding raw material, the air inside it is discharged into the dumbbell head groove. As the injection molding raw material inside the insulation tank is continuously injected into the dumbbell head groove through the injection molding tube, the internal gas is discharged from the top after the dumbbell head groove is filled with the injection molding raw material, and the injection molding operation of the dumbbell is completed.

[0009] Preferably, the exhaust mechanism includes an exhaust pipe, an exhaust groove and a one-way exhaust valve, the exhaust grooves are symmetrically arranged on the side walls at both ends of the injection mold, the exhaust grooves are opened on three sides, the exhaust pipe is arranged inside the exhaust grooves on both sides of the injection tube, and the one-way exhaust valve is connected and arranged on the outside of the exhaust pipe; the pressure stabilizing mechanism includes a pressure stabilizing transparent tube, a pressure stabilizing cavity, a pressure stabilizing plate, an air vent, a pressure stabilizing spring, a pressure stabilizing ball, a connecting rod, a pressure stabilizing magnet and a fixed electromagnet, the pressure stabilizing transparent tube is connected and arranged on the side of the exhaust pipe away from the injection mold, the pressure stabilizing cavity is arranged at one end of the pressure stabilizing transparent tube away from the exhaust pipe, the inner diameter of the pressure stabilizing cavity is arranged from small to large, the pressure stabilizing plate is arranged on the inner wall of one end of the pressure stabilizing transparent tube close to the exhaust pipe, the pressure stabilizing transparent tube is arranged on the inner wall of the end of the pressure stabilizing cavity with a smaller diameter, and the air vent is arranged at the pressure stabilizing The upper wall of the plate, the pressure-stabilizing spring is arranged on the side of the pressure-stabilizing plate away from the exhaust pipe, the pressure-stabilizing ball is arranged on the side of the pressure-stabilizing spring away from the pressure-stabilizing plate, the connecting rod is arranged on the side of the pressure-stabilizing ball close to the pressure-stabilizing plate, the pressure-stabilizing magnet is arranged on the side of the connecting rod away from the pressure-stabilizing ball, the fixed electromagnet is arranged on the bottom wall of the pressure-stabilizing plate outside the pressure-stabilizing spring, and the pressure-stabilizing magnet and the fixed electromagnet are arranged opposite to each other; the current detecting mechanism includes a current detecting tube and a gas flow meter, the current detecting tube is connected and arranged on the side of the pressure-stabilizing transparent tube away from the exhaust pipe, and the gas flow meter is connected and arranged at one end of the current detecting tube away from the pressure-stabilizing transparent tube; the air extraction mechanism includes a compressed air bag, an air outlet valve and a one-way air valve, the compressed air bag is connected and arranged between the current detecting tubes, the air outlet valve is connected and arranged on the side wall of the compressed air bag, and the one-way air valve is connected and arranged on the outside of the current detecting tube.

[0010] When in use, in the initial state, the pressure-stabilizing spring is in a shortened state, the diameter of the pressure-stabilizing ball is equal to the diameter of the smallest end of the pressure-stabilizing cavity, and the pressure-stabilizing ball is engaged in the cavity at the smallest end of the pressure-stabilizing cavity. At this time, the exhaust pipe and the pressure-stabilizing transparent tube are blocked and cut off. When the dumbbell bar groove and the dumbbell head groove are filled with injection molding materials, the air inside the dumbbell head groove and the dumbbell bar groove is squeezed into the exhaust pipe through the exhaust groove, and the fixed electromagnet is energized to generate magnetism. The fixed electromagnet and the voltage-stabilizing magnet are set with the same pole. The fixed electromagnet is fixed to the side wall of the voltage-stabilizing plate and pushes the voltage-stabilizing magnet through repulsion under the deformation of the pressure-stabilizing spring. The voltage-stabilizing magnet is driven by the connecting rod. The pressure-stabilizing ball slides along the inner wall of the pressure-stabilizing cavity, and moves along the inner wall of the pressure-stabilizing cavity from the smaller diameter end to the larger diameter end. At this time, the exhaust pipe and the pressure-stabilizing transparent tube are connected, and the air exhausted from the dumbbell head slot and the dumbbell rod slot flows into the current detection tube through the exhaust pipe and the pressure-stabilizing transparent tube. The air inside the current detection tube flows into the compressed air bag, squeezing the compressed air bag and opening the air outlet valve. Under the action of the one-way conduction of the one-way air valve, the gas inside the compressed air bag is discharged through the air outlet valve, and then the air outlet valve is closed. The compressed air bag is in a deflated state, and the interior of the compressed air bag is in a negative pressure state. At this time, the pressure-stabilizing ball is in the compressed state. Under the suction of the negative pressure of the airbag, the pressure-stabilizing spring is deformed along the inner wall of the pressure-stabilizing cavity from the smaller diameter to the larger diameter. The exhaust pipe is connected to the pressure-stabilizing transparent tube. The exhaust groove, exhaust pipe, pressure-stabilizing transparent tube and current detection tube are all in a negative pressure state, which is convenient for the discharge of bubbles in the uncured injection molding material inside the dumbbell head groove and the dumbbell rod groove, avoiding the presence of bubbles inside the dumbbell after injection molding and reducing the overall strength of the dumbbell after molding. When the pressure-stabilizing spring at one end of the injection mold is greatly deformed, the gap between the pressure-stabilizing ball and the inner wall of the pressure-stabilizing cavity is larger, indicating that the compressed airbag has a great impact on the exhaust groove and exhaust pipe at one end of the injection mold. The suction force generated inside the air pipe, the voltage-stabilizing transparent tube and the current detection tube is relatively large. In order to maintain the relative balance of the exhaust channels at both ends of the injection mold and avoid destroying the dumbbell body before molding, the fixed electromagnet is energized to generate magnetism with the voltage-stabilizing magnet, the magnetic pole of the fixed electromagnet is changed and the voltage-stabilizing magnet is set with opposite poles, the fixed electromagnet is fixed to the side wall of the voltage-stabilizing plate and the voltage-stabilizing magnet is adsorbed by magnetic force, and the voltage-stabilizing magnet drives the voltage-stabilizing ball to move to the end with a smaller diameter of the voltage-stabilizing cavity through the connecting rod, thereby reducing the gap between the voltage-stabilizing ball and the inner wall of the voltage-stabilizing cavity, and balancing the pressure inside the exhaust channels at both ends of the injection mold, thereby facilitating better elimination of bubbles in the injection molding raw materials.

[0011] Specifically, a controller is provided on the side wall of the injection mold.

[0012] Wherein, the controller is electrically connected to the insulation tank and the gas flow meter respectively.

[0013] Preferably, the gas flow meter is a LAMTEC differential pressure gas flow meter.

[0014] The beneficial effects achieved by adopting the above structure are as follows:

[0015] Compared with the prior art, this solution adopts the method of mid-stage injection molding and constant pressure exhaust. By setting up a speed-controlled heat flow mechanism and a speed-detecting defoaming mechanism, under the coordinated use of the exhaust mechanism, the pressure-stabilizing mechanism, the flow-detecting mechanism and the air-exhausting mechanism, the injection speed is controlled to reduce the probability of bubbles generated inside the raw material in the mold, and the balanced negative pressure created at the top of the mold can discharge the bubbles already formed in the injection molding raw material, ensuring the overall use strength of the product after injection molding, thereby improving the injection efficiency of the injection mold for the dumbbell, squeezing the compressed air bag, and opening the air outlet valve. Under the action of the one-way air valve's unidirectional conduction, the gas inside the compressed airbag is discharged through the air outlet valve, and then the air outlet valve is closed, the compressed airbag is deflated, and the inside of the compressed airbag is in a negative pressure state. At this time, the pressure-stabilizing ball moves from the smaller diameter at the end to the larger diameter along the inner wall of the pressure-stabilizing cavity through the deformation of the pressure-stabilizing spring under the suction of the negative pressure of the compressed airbag. The exhaust pipe and the pressure-stabilizing transparent tube are connected, and the exhaust groove, exhaust pipe, pressure-stabilizing transparent tube and current detection tube are all in a negative pressure state, which is convenient for the discharge of bubbles inside the uncured injection molding material inside the dumbbell head groove and the dumbbell rod groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0017] Figure 2 This is the main stereogram of the scheme;

[0018] Figure 3 This is a bottom-up stereogram of the scheme;

[0019] Figure 4 This is a schematic diagram of the internal structure of this scheme;

[0020] Figure 5 This is the main view of this scheme;

[0021] Figure 6 This is a side view of the scheme;

[0022] Figure 7 This is a top view of the scheme;

[0023] Figure 8 for Figure 5 AA section view of the part;

[0024] Fig. 9 for Figure 6 Part I shows a magnified structural view.

[0025] Among them, 1. guide bolt, 2. injection mold, 3. closing nut, 4. speed-controlling heat flow mechanism, 5. dumbbell head slot, 6. injection molding tube, 7. insulation tank, 8. speed-control valve, 9. injection molding slot, 10. speed-detecting defoaming mechanism, 11. exhaust mechanism, 12. exhaust pipe, 13. exhaust slot, 14. one-way exhaust valve, 15. voltage-stabilizing mechanism, 16. voltage-stabilizing transparent tube, 17. voltage-stabilizing cavity, 18. voltage-stabilizing plate, 19. vent, 20. voltage-stabilizing spring, 21. voltage-stabilizing ball, 22. connecting rod, 23. voltage-stabilizing magnet, 24. fixed electromagnet, 25. current-detecting mechanism, 26. current-detecting tube, 27. gas flow meter, 28. exhaust mechanism, 29. compressed air bag, 30. outlet valve, 31. controller, 32. dumbbell rod slot, 33. one-way air valve.

[0026] The accompanying drawings are used to provide further understanding of the present scheme and constitute a part of the specification. Together with the embodiments of the present scheme, they are used to explain the present scheme and do not constitute a limitation on the present scheme. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the present scheme will be clearly and completely described below in conjunction with the drawings in the embodiments of the present scheme. Obviously, the described embodiments are only part of the embodiments of the present scheme, not all of the embodiments; based on the embodiments in the present scheme, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present scheme.

[0028] In the description of this scheme, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this scheme and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this scheme.

[0029] like Figure 1-Figure 9As shown, the present scheme proposes a molding injection mold for dumbbell processing, comprising a guide bolt 1, an injection mold 2, a closing nut 3, a speed-controlling heat flow mechanism 4 and a speed-detecting defoaming mechanism 10, wherein the injection mold 2 is symmetrically arranged at both ends of the guide bolt 1, and the injection mold 2 is slidingly arranged on the outside of the guide bolt 1, the closing nut 3 is arranged at the end of the guide bolt 1 away from the injection mold 2, and the closing nut 3 is threadedly connected to the guide bolt 1, the speed-controlling heat flow mechanism 4 is arranged on the injection mold 2, the speed-detecting defoaming mechanism 10 is arranged at both ends of the injection mold 2, the speed-detecting defoaming mechanism 10 comprises an exhaust mechanism 11, a pressure-stabilizing mechanism 15, a current-detecting mechanism 25 and an air-exhausting mechanism 28, the exhaust mechanism 11 is arranged on the upper wall of the injection mold 2, the pressure-stabilizing mechanism 15 is arranged at the end of the exhaust mechanism 11 away from the injection mold 2, the current-detecting mechanism 25 is arranged at the end of the pressure-stabilizing mechanism 15 away from the exhaust mechanism 11, and the air-exhausting mechanism 28 is arranged between the current-detecting mechanisms 25.

[0030] The speed-controlled heat flow mechanism 4 includes a dumbbell head groove 5, an injection tube 6, an insulation tank 7, a speed control valve 8, an injection groove 9 and a dumbbell rod groove 32. The dumbbell head groove 5 is symmetrically arranged on the side wall of the injection mold 2. The injection mold 2 is open at one end, and the dumbbell head groove 5 is arranged relatively. The injection groove 9 is arranged on a side of the injection mold 2 close to the dumbbell head groove 5, and the injection groove 9 is open on three sides. The injection tube 6 is arranged inside the injection groove 9 arranged on the side wall of the injection mold 2 at one end of the guide bolt 1. The insulation tank 7 is connected to the side of the injection tube 6 away from the injection groove 9. The insulation tank 7 is open at the upper end. The speed control valve 8 is connected to one end of the injection tube 6 close to the insulation tank 7. The dumbbell rod groove 32 is arranged on the side wall of the injection mold 2 between the dumbbell head grooves 5, and the dumbbell rod groove 32 is open on three sides. The dumbbell rod groove 32 is connected to the dumbbell head groove 5, and the injection groove 9 is connected to the dumbbell rod groove 32.

[0031] The exhaust mechanism 11 includes an exhaust pipe 12, an exhaust groove 13 and a one-way exhaust valve 14. The exhaust groove 13 is symmetrically arranged on the side walls of the injection mold 2 at both ends. The exhaust groove 13 is opened on three sides. The exhaust pipe 12 is arranged inside the exhaust groove 13 on both sides of the injection tube 6. The one-way exhaust valve 14 is connected to the outside of the exhaust pipe 12; the pressure stabilizing mechanism 15 includes a pressure stabilizing transparent tube 16, a pressure stabilizing cavity 17, a pressure stabilizing plate 18, a vent 19, a pressure stabilizing spring 20, a pressure stabilizing ball 21, a connecting rod 2 2. A voltage-stabilizing magnet 23 and a fixed electromagnet 24, wherein the voltage-stabilizing transparent tube 16 is connected to and arranged on the side of the exhaust pipe 12 away from the injection mold 2, the voltage-stabilizing cavity 17 is arranged at one end of the voltage-stabilizing transparent tube 16 away from the exhaust pipe 12, and the inner diameter of the voltage-stabilizing cavity 17 is arranged from small to large, the voltage-stabilizing plate 18 is arranged on the inner wall of one end of the voltage-stabilizing transparent tube 16 close to the exhaust pipe 12, the voltage-stabilizing transparent tube 16 is arranged on the inner wall of one end of the voltage-stabilizing cavity 17 with a smaller diameter, and the vent 19 is arranged on the upper wall of the voltage-stabilizing plate 18, The pressure stabilizing spring 20 is arranged on the side of the pressure stabilizing plate 18 away from the exhaust pipe 12, the pressure stabilizing ball 21 is arranged on the side of the pressure stabilizing spring 20 away from the pressure stabilizing plate 18, the connecting rod 22 is arranged on the side of the pressure stabilizing ball 21 close to the pressure stabilizing plate 18, the pressure stabilizing magnet 23 is arranged on the side of the connecting rod 22 away from the pressure stabilizing ball 21, the fixed electromagnet 24 is arranged on the bottom wall of the pressure stabilizing plate 18 outside the pressure stabilizing spring 20, and the pressure stabilizing magnet 23 is arranged opposite to the fixed electromagnet 24; the current detection mechanism 25 includes a current detection tube 26 and a gas flowmeter 27, the current detection tube 26 is connected and arranged on the side of the voltage-stabilizing transparent tube 16 away from the exhaust pipe 12, and the gas flowmeter 27 is connected and arranged at one end of the current detection tube 26 away from the voltage-stabilizing transparent tube 16; the air extraction mechanism 28 includes a compressed air bag 29, an air outlet valve 30 and a one-way air valve 33, the compressed air bag 29 is connected and arranged between the current detection tubes 26, the air outlet valve 30 is connected and arranged on the side wall of the compressed air bag 29, and the one-way air valve 33 is connected and arranged on the outside of the current detection tube 26.

[0032] A controller 31 is disposed on the side wall of the injection mold 2 .

[0033] The controller 31 is electrically connected to the heat preservation tank 7 and the gas flow meter 27 respectively.

[0034] The model of the gas flow meter 27 is a LAMTEC differential pressure gas flow meter.

[0035] During specific use, in Example 1, in the initial state, the injection mold 2 is respectively located at the two ends of the guide bolt 1. When the dumbbell needs to be injection molded, the injection mold 2 at the two ends of the guide bolt 1 is pushed to move, and the injection mold 2 slides along the guide bolt 1 to drive the dumbbell head groove 5 and the dumbbell rod groove 32 to move relative to each other. The injection mold 2 fits with each other, and the dumbbell head grooves 5 and the dumbbell rod grooves 32 are combined to form an injection cavity for the dumbbell, and the injection groove 9 is engaged with the outside of the injection tube 6. Then the closing nut 3 is rotated, and the closing nut 3 rotates along the guide bolt 1 and fits the side wall of the injection mold 2. The injection mold 2 changes from an active state to a fixed state, and the speed control valve 8 is in a closed state. The insulation tank 7 and the injection tube 6 are blocked and cut off, and the same as the two groups of dumbbell head grooves 5 are added into the insulation tank 7. The controller 31 controls the insulation tank 7 to start, the insulation tank 7 heats the injection molding material added thereto, maintains the injection molding temperature of the injection molding material, opens the speed control valve 8, the injection molding tube 6 is connected to the insulation tank 7, the injection molding material inside the insulation tank 7 flows into the dumbbell bar groove 32 through the injection molding tube 6, the injection molding material inside the dumbbell bar groove 32 flows into the dumbbell head groove 5 at both ends, the space between the dumbbell bar grooves 32 is smaller than the space between the dumbbell head grooves 5, as the cavity formed between the dumbbell bar grooves 32 is filled with the injection molding material, the air inside it is discharged into the dumbbell head groove 5, as the injection molding material inside the insulation tank 7 is continuously injected into the dumbbell head groove 5 through the injection molding tube 6, the internal gas of the dumbbell head groove 5 is discharged from the top after the injection molding material is filled inside;

[0036] In the initial state, the pressure stabilizing spring 20 is in a shortened state, the diameter of the pressure stabilizing ball 21 is equal to the diameter of the smallest end of the pressure stabilizing cavity 17, and the pressure stabilizing ball 21 is engaged in the cavity at the smallest end of the pressure stabilizing cavity 17. At this time, the exhaust pipe 12 and the pressure stabilizing transparent tube 16 are blocked and cut off. When the dumbbell rod groove 32 and the dumbbell head groove 5 are filled with injection molding materials, the air inside the dumbbell head groove 5 and the dumbbell rod groove 32 is squeezed into the exhaust pipe 12 through the exhaust groove 13, and the controller 31 controls the fixed electromagnet 24 to start, and the fixed electromagnet 24 is energized to generate magnetism. The fixed electromagnet 24 and the voltage stabilizing magnet 23 are arranged with the same pole, and the fixed electromagnet 24 is fixed to the side wall of the voltage stabilizing plate 18. Under the deformation of the pressure stabilizing spring 20, the voltage stabilizing magnet is pushed by repulsive force. 23, the voltage-stabilizing magnet 23 drives the voltage-stabilizing ball 21 to slide along the inner wall of the voltage-stabilizing cavity 17 through the connecting rod 22, and the voltage-stabilizing ball 21 moves along the inner wall of the voltage-stabilizing cavity 17 from the diameter of the smaller end to the inside of the diameter of the larger end. At this time, the exhaust pipe 12 and the voltage-stabilizing transparent tube 16 are connected, and the air discharged from the dumbbell head groove 5 and the dumbbell rod groove 32 flows into the current detection tube 26 through the exhaust pipe 12 and the voltage-stabilizing transparent tube 16. The air inside the current detection tube 26 flows into the compressed air bag 29, squeezing the compressed air bag 29, opening the air outlet valve 30, and under the action of the one-way conduction of the one-way air valve 33, the gas inside the compressed air bag 29 is discharged through the air outlet valve 30, and then the air outlet valve 30 is closed, and the compressed air bag 29 is in a deflated state;

[0037] The interior of the compressed airbag 29 is in a negative pressure state. At this time, the pressure-stabilizing ball 21 moves from the diameter of the smaller end to the diameter of the larger end along the inner wall of the pressure-stabilizing cavity 17 through the deformation of the pressure-stabilizing spring 20 under the suction force of the negative pressure of the compressed airbag 29. The exhaust pipe 12 is connected to the pressure-stabilizing transparent tube 16. The exhaust groove 13, the exhaust pipe 12, the pressure-stabilizing transparent tube 16 and the current detection tube 26 are all in a negative pressure state, which is convenient for the discharge of bubbles in the uncured injection molding material inside the dumbbell head groove 5 and the dumbbell rod groove 32, avoiding the presence of bubbles inside the dumbbell after injection molding and reducing the overall strength of the dumbbell after molding. When the pressure-stabilizing spring 20 at one end of the injection mold 2 is greatly deformed, the gap between the pressure-stabilizing ball 21 and the inner wall of the pressure-stabilizing cavity 17 is large, indicating that the compressed airbag 29 has a great impact on the injection mold 2. The suction force generated inside the exhaust groove 13, the exhaust pipe 12, the voltage-stabilizing transparent tube 16 and the current-detecting tube 26 at the end is relatively large. In order to maintain the relative balance of the exhaust channels at both ends of the injection mold 2 and avoid damaging the dumbbell body before molding, the controller 31 controls the fixed electromagnet 24 to be energized and generate magnetism between the voltage-stabilizing magnet 23. The magnetic pole of the fixed electromagnet 24 changes and is set to be opposite to the voltage-stabilizing magnet 23. The fixed electromagnet 24 is fixed on the side wall of the voltage-stabilizing plate 18 and absorbs the voltage-stabilizing magnet 23 by magnetic force. The voltage-stabilizing magnet 23 drives the voltage-stabilizing ball 21 to move to the end with a smaller diameter of the voltage-stabilizing cavity 17 through the connecting rod 22, thereby reducing the gap between the voltage-stabilizing ball 21 and the inner wall of the voltage-stabilizing cavity 17, and balancing the pressure inside the exhaust channels at both ends of the injection mold 2, thereby facilitating better elimination of bubbles in the injection molding raw materials.

[0038] When the injection molding material inside the heat preservation tank 7 completely flows into the dumbbell head groove 5 and the dumbbell rod groove 32, wait for the injection molding material inside the dumbbell head groove 5 and the dumbbell rod groove 32 to cool down for a period of time, then take out the formed dumbbell body, rotate the closing nut 3, the closing nut 3 rotates along the guide bolt 1 away from the side wall of the injection mold 2, and the injection molds 2 slide back to back along the guide bolt 1, and the formed dumbbell is taken out from the dumbbell head groove 5 and the dumbbell rod groove 32, completing the injection molding operation of the dumbbell.

[0039] Embodiment 2: This embodiment is based on the above embodiment. By controlling the opening of the speed control valve 8, the injection speed of the raw material is regulated to reduce the probability of the plastic flowing unevenly in the mold and forming bubbles. When the top of the dumbbell head groove 5 is in a negative pressure state, the gas flowing into the compressed air bag 29 is measured. The controller 31 controls the gas flow meter 27 to start. When the bubbles in the raw material are discharged, the bubbles are converted into gas. Under the negative pressure of the compressed air bag 29, the gas flows through the exhaust pipe 12 and the voltage-stabilizing transparent tube 16 into the current detection tube 26. The gas flows through the current detection tube 26 and enters the pressure bag 29. Inside the compression bag 29, the gas flow meter 27 records the gas flow that flows into the compression bag 29 through the flow detection tube 26. By matching the recorded gas flow with the opening of the speed control valve 8, after multiple injection molding operations on the dumbbell, it is possible to find out at which gear opening of the speed control valve 8 the injection molding material inside the insulation tank 7 forms fewer bubbles after entering the dumbbell head groove 5 and the dumbbell rod groove 32, thereby ensuring the overall strength of the dumbbell after injection molding; improving the injection molding efficiency of the injection mold 2 for the dumbbell; and repeating the above operation the next time the dumbbell is used.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] The above is a description of the present solution and its implementation methods, which is not restrictive. The drawings show only one implementation method of the present solution, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creative design without departing from the creative purpose of the present solution, they should all fall within the protection scope of the present solution.

Claims

1. A dumbbell molding injection mold, comprising a guide bolt (1), an injection mold (2) and a closing nut (3), characterized in that: It also includes a speed-controlling heat flow mechanism (4) and a speed-detecting defoaming mechanism (10), wherein the injection mold (2) is symmetrically arranged at both ends of the guide bolt (1), the injection mold (2) is slidably arranged outside the guide bolt (1), the closing nut (3) is arranged at one end of the guide bolt (1) away from the injection mold (2), the closing nut (3) is threadedly connected to the guide bolt (1), the speed-controlling heat flow mechanism (4) is arranged on the injection mold (2), and the speed-detecting defoaming mechanism (10) is arranged on the injection mold (2). The speed detection defoaming mechanism (10) comprises an exhaust mechanism (11), a pressure stabilizing mechanism (15), a flow detection mechanism (25) and an air extraction mechanism (28); the exhaust mechanism (11) is arranged on the upper wall of the injection mold (2); the pressure stabilizing mechanism (15) is arranged at one end of the exhaust mechanism (11) away from the injection mold (2); the flow detection mechanism (25) is arranged at one end of the pressure stabilizing mechanism (15) away from the exhaust mechanism (11); and the air extraction mechanism (28) is arranged between the flow detection mechanisms (25); The speed-controlled heat flow mechanism (4) comprises a dumbbell head groove (5), an injection tube (6), a heat preservation tank (7), a speed control valve (8), an injection groove (9) and a dumbbell rod groove (32); the dumbbell head groove (5) is symmetrically arranged on the side wall of the injection mold (2); the injection mold (2) is open at one end, and the dumbbell head groove (5) is arranged opposite to the dumbbell head groove (5); the injection groove (9) is arranged on a side of the injection mold (2) close to the dumbbell head groove (5); and the injection groove (9) is open on three sides; The exhaust mechanism (11) comprises an exhaust pipe (12), an exhaust groove (13) and a one-way exhaust valve (14); the exhaust groove (13) is symmetrically arranged on the side walls at both ends of the injection mold (2); the exhaust groove (13) is opened on three sides; the exhaust pipe (12) is arranged inside the exhaust groove (13) on both sides of the injection tube (6); and the one-way exhaust valve (14) is arranged in communication with the outside of the exhaust pipe (12); The pressure stabilizing mechanism (15) comprises a pressure stabilizing transparent tube (16), a pressure stabilizing cavity (17), a pressure stabilizing plate (18), a vent (19), a pressure stabilizing spring (20), a pressure stabilizing ball (21), a connecting rod (22), a pressure stabilizing magnet (23) and a fixed electromagnet (24); the pressure stabilizing transparent tube (16) is connected to the exhaust pipe (12) and is arranged on a side away from the injection mold (2); The pressure stabilizing cavity (17) is arranged at one end of the pressure stabilizing transparent tube (16) away from the exhaust pipe (12), the inner diameter of the pressure stabilizing cavity (17) is arranged from small to large, the pressure stabilizing plate (18) is arranged on the inner wall of one end of the pressure stabilizing transparent tube (16) close to the exhaust pipe (12), the pressure stabilizing transparent tube (16) is arranged on the inner wall of the end of the pressure stabilizing cavity (17) with a smaller diameter, and the vent (19) is arranged on the upper wall of the pressure stabilizing plate (18); The pressure stabilizing spring (20) is arranged on a side of the pressure stabilizing plate (18) away from the exhaust pipe (12), the pressure stabilizing ball (21) is arranged on a side of the pressure stabilizing spring (20) away from the pressure stabilizing plate (18), the connecting rod (22) is arranged on a side of the pressure stabilizing ball (21) close to the pressure stabilizing plate (18), the pressure stabilizing magnet (23) is arranged on a side of the connecting rod (22) away from the pressure stabilizing ball (21), the fixed electromagnet (24) is arranged on the bottom wall of the pressure stabilizing plate (18) outside the pressure stabilizing spring (20), and the pressure stabilizing magnet (23) and the fixed electromagnet (24) are arranged opposite to each other; The current detection mechanism (25) comprises a current detection tube (26) and a gas flow meter (27); the current detection tube (26) is connected to a side of the voltage-stabilizing transparent tube (16) away from the exhaust pipe (12); and the gas flow meter (27) is connected to an end of the current detection tube (26) away from the voltage-stabilizing transparent tube (16); The air extraction mechanism (28) comprises a compressed air bag (29), an air outlet valve (30) and a one-way air valve (33); the compressed air bag (29) is arranged in communication with the current detection tube (26); the air outlet valve (30) is arranged in communication with the side wall of the compressed air bag (29); and the one-way air valve (33) is arranged in communication with the outside of the current detection tube (26).

2. The dumbbell molding injection mold according to claim 1, characterized in that: The injection molding tube (6) is arranged inside an injection molding groove (9) arranged on the side wall of the injection mold (2) at one end of the guide bolt (1); the heat preservation tank (7) is arranged on the side of the injection molding tube (6) away from the injection molding groove (9); the heat preservation tank (7) is arranged with an upper end opening; the speed control valve (8) is arranged on the side of the injection molding tube (6) close to the heat preservation tank (7); the dumbbell rod groove (32) is arranged on the side wall of the injection mold (2) between the dumbbell head groove (5); the dumbbell rod groove (32) is arranged with three sides opening; the dumbbell rod groove (32) is arranged to be in communication with the dumbbell head groove (5); and the injection molding groove (9) is arranged to be in communication with the dumbbell rod groove (32).

3. The dumbbell molding injection mold according to claim 2, characterized in that: A controller (31) is provided on the side wall of the injection mold (2), and the controller (31) is electrically connected to the heat preservation tank (7) and the gas flow meter (27) respectively.

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