Injection molding equipment for toothbrush production

Abstract

The present invention belongs to the field of injection molding technology, and specifically relates to an injection molding device for toothbrush production, comprising a base, on which a movable mold and a fixed mold are provided; a docking mechanism, which is provided on the fixed mold and the movable mold; an injection molding machine, which is fixedly mounted on the base and used for injection molding; a spraying mechanism, which is provided on the fixed mold; an auxiliary mechanism, which is provided on the base and used for assisting injection molding and demoulding; and a cleaning mechanism, which is provided on the fixed mold and used for cleaning the gate area. The auxiliary mechanism includes a support frame, which is fixedly connected to the base, and on which a feed portion is provided in an array, a support plate is slidably connected in a chute provided on the base, and a linkage portion and a control portion are provided on the base. The present invention can realize the automation of the entire injection molding process in toothbrush production, including key steps such as mold closing, injection molding, cooling, demoulding, and cleaning, thereby effectively improving production efficiency and product quality.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding, and in particular relates to an injection molding device for toothbrush production. Background Art

[0002] Injection molding is a production method used to shape industrial products, primarily encompassing rubber and plastic injection molding. Furthermore, injection molding can be further subdivided into compression molding and die casting. An injection molding machine, also known as an injection machine or injection molding machine, is key equipment for producing various plastic products. Its primary function is to form thermoplastic or thermosetting plastics through a plastic molding mold. The injection molding process is accomplished by the injection molding machine and mold. The operating principle of an injection molding machine is similar to that of a medical syringe. The screw (or plunger) propels molten plastic into a closed mold cavity. The plastic solidifies and sets its shape, ultimately forming the final product. Injection molding is a cyclical process, consisting of the following steps: metered feeding, melt plasticization, pressure injection, mold filling, pressure-maintaining cooling, and mold opening and part removal. After part removal, the mold closes again, and the next cycle begins.

[0003] During the injection molding process, a certain amount of plastic solution will accumulate in the gate area, where the injection tube is located. Since the space in the gate area is relatively small, it becomes more difficult to demold the raised part formed in the gate area. When the mold opening action occurs, the interaction between the fixed mold and the movable mold will exert a pulling force on the molded workpiece. This pulling action often causes the workpiece to break in the gate area. The residual part left in the gate area after the break needs to be manually cleaned by the staff. This process is not only time-consuming but also labor-intensive. In addition, the traditional dry demolding method usually relies on rigid demolding means. Although this method is simple, it is easy to damage the workpiece, and its automation level is not high, which limits the improvement of production efficiency to a certain extent. Summary of the Invention

[0004] The purpose of the present invention is to provide an injection molding device for toothbrush production, which can realize the automation of the entire process of injection molding in toothbrush production, including key steps such as mold closing, injection molding, cooling, demoulding and cleaning, thereby effectively improving production efficiency and product quality.

[0005] The technical solutions adopted by the present invention are as follows:

[0006] An injection molding device for toothbrush production comprises a base, a movable mold and a fixed mold are arranged on the base, and both the movable mold and the fixed mold are provided with a contoured cooling groove;

[0007] A docking mechanism, which is provided on the fixed mold and the movable mold and is used to connect the fixed mold and the movable mold;

[0008] An injection molding machine, which is fixedly mounted on the base and is used for injection molding;

[0009] A spraying mechanism, which is provided on the fixed mold and is used to spray a release agent on the gate area;

[0010] An auxiliary mechanism, which is arranged on the base and is used to assist injection molding and demoulding;

[0011] A cleaning mechanism, the cleaning mechanism being provided on the fixed mold and being used for cleaning the gate area;

[0012] Among them, the auxiliary mechanism includes a support frame, which is fixedly connected to the base, and the support frame is provided with a top material part distributed in an array. A support plate is slidably connected in a slide groove opened on the base, and the base is provided with a linkage part and a control part.

[0013] In a preferred embodiment, a slide groove is provided on the top surface of the base, and a refrigeration box is slidably installed in the slide groove, and the refrigeration box is fixedly connected to the movable mold, the fixed mold is arranged next to the movable mold, and the fixed mold is fixedly connected to the base, and a first electric push rod is also fixedly installed on the base, and the telescopic end of the first electric push rod is fixedly connected to the refrigeration box, wherein a water pump is installed on the refrigeration box, and the water pumping end of the water pump is connected to the refrigeration box, the drainage end of the water pump is installed with a drain pipe, and the drain pipe is connected to the cooling groove on the movable mold, and the lower end of the fixed mold is connected to a return pipe, and the return pipe is connected to the refrigeration box.

[0014] In a preferred embodiment, the docking mechanism includes a first hollow column, the first hollow columns are connected to the movable mold in an array distribution, and the first hollow column is connected to the cooling groove on the movable mold, the inner wall of the first hollow column is fixedly connected to the first block by a support rod, the center of the first block is slidably inserted with a first sliding rod, the first sliding rod is fixedly sleeved with a retaining ring, one side of the retaining ring is fixedly connected to a first compression spring, and the other end of the first compression spring is fixedly connected to the first block, the inner wall of the first hollow column is fixedly connected to the first guide seat, one end of the first sliding rod is fixedly connected to the first stopper, the second hollow columns are connected to the fixed mold in an array distribution, and the second hollow columns are provided with a water outlet hole, which is connected to the cooling groove on the fixed mold through the water outlet hole, the inner wall of the second hollow column is fixedly connected to the second guide seat, the inner wall of the second hollow column is fixedly connected to the second block by a support rod, the center of the second block is slidably inserted with a second sliding rod, one end of the second sliding rod is fixedly connected to the second stopper, and the outer wall of one end of the second sliding rod is sleeved with a second compression spring.

[0015] In a preferred embodiment, the spraying mechanism includes an annular liquid storage tank, which is provided on the fixed mold, and an injection tube is fixedly connected to the center of the annular liquid storage tank, and the injection tube is provided with micropores distributed in an array at the annular liquid storage tank, and the injection tube is connected to the discharge end of the injection molding machine, and a liquid inlet pipe is fixedly connected to the fixed mold, and the liquid inlet pipe is connected to the annular liquid storage tank, an air bag is provided on the liquid inlet pipe, and a slide rail is provided on the top surface of the fixed mold, two clamping blocks are slidably connected to the slide rail, and a third compression spring is sleeved on the slide rail, and a hollow box is also connected to the liquid inlet pipe, and one end of the hollow box is piston-type plug-in with a piston rod, one end of the piston rod is fixedly connected to a blocking block, and the outer wall of one end of the piston rod is sleeved with a fourth compression spring, and a round rod and a trapezoidal block are fixedly connected to the movable mold.

[0016] In a preferred embodiment, the lifting part includes a hollow rod, which is fixedly connected to the support frame. A moving rod is piston-connected at one end of the hollow rod. A fifth compression spring is sleeved on the outer wall of the moving rod. A piston block is fixedly connected to one end of the moving rod.

[0017] In a preferred embodiment, the linkage part includes a rotating rod, which is rotatably connected to the base, a winding roller is fixedly installed on the upper end of the rotating rod, a traction belt is fixedly connected to the winding roller, and the other end of the traction belt is fixedly connected to the support plate, a gear is fixedly installed on the lower end of the rotating rod, a rack is fixedly connected to the side of the refrigeration box, and a limiting column is provided at the traction belt.

[0018] In a preferred embodiment, the control unit includes a second electric push rod, which is fixedly mounted on the base. The telescopic end of the second electric push rod is fixedly connected to a baffle, and the top surface of the base is also fixedly mounted with a first contact switch and a second contact switch.

[0019] In a preferred embodiment, the cleaning mechanism includes a push rod, which is piston-inserted in the injection molding tube, and the bottom surface of the fixed mold is fixedly connected to a fixed rod, one end of the fixed rod is provided with an air cylinder, and one end of the fixed rod is fixedly connected to a piston plate, the refrigeration box is fixedly connected to a connecting rod, the other end of the connecting rod is fixedly connected to a sleeve, a moving block is slidably connected to the sleeve, and the moving block is inserted into the bottom of the air cylinder, both sides of the moving block are fixedly connected to a spring, and the other end of the spring is fixedly connected to the sleeve, a support plate is fixedly connected between the air cylinder and the push rod, a guide rod is slidably inserted on the support plate, and the guide rod is fixedly connected to the fixed mold, and an air pipe is also connected between the air cylinder and the push rod, wherein an air groove is provided inside the push rod, and micropores are provided in a ring-shaped distribution at the pointed cone end of the push rod.

[0020] In a preferred embodiment, sleeves are connected to the movable mold in an array-distributed manner, and the hollow rod is inserted into the sleeve in a piston-like manner.

[0021] In a preferred embodiment, the outer wall of the first hollow column and the inner wall of the second hollow column are both provided with a graphene coating.

[0022] The technical effects achieved by the present invention are:

[0023] The present invention uses the ejecting part in the auxiliary mechanism, the support frame and the linkage part, and after the injection molding is completed, the displacement of the refrigeration box triggers the sliding of the support plate, and the ejecting part accurately ejects the molded workpiece from the movable mold.

[0024] Dual protection of vacuum and air pressure-assisted demoulding: The hollow rod in the ejector achieves vacuum in the mold cavity through the reciprocating motion of the piston block (driven by the fifth compression spring), effectively reducing bubbles and molding defects. During demoulding, compressed air is blown to move the workpiece (exhaust is triggered by the rewinding operation of the linkage part), solving the problem of workpiece adhesion caused by traditional rigid demoulding.

[0025] The present invention employs a spraying mechanism and a cleaning mechanism, respectively used to spray a release agent on the gate area and clean the gate area. The spraying mechanism automatically applies a release agent to the gate area before each injection, simplifying the subsequent demolding process. The cleaning mechanism automatically removes residual impurities from the injection tube during mold opening, ensuring cleanliness and preventing any impact on the subsequent injection process. The application of these two mechanisms not only improves the automation level of the entire production process, but also enhances production stability and safety, reducing the uncertainty caused by human intervention.

[0026] The present invention achieves nested docking of the first hollow column and the second hollow column, and the device automatically connects the cooling water channel during mold closing, eliminating the complex arrangement of traditional external pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the overall left side view of the present invention;

[0028] Figure 2 It is the overall right side view of the present invention;

[0029] Figure 3 Schematic diagram of the disassembly of the movable mold and the fixed mold of the present invention;

[0030] Figure 4 This invention Figure 3 An enlarged schematic diagram of part A shown in FIG;

[0031] Figure 5 This invention Figure 3 The right side diagram of

[0032] Figure 6 This invention Figure 3 A side sectional view of

[0033] Figure 7 This invention Figure 6 An enlarged schematic diagram of part B shown in ;

[0034] Figure 8 This invention Figure 6 An enlarged schematic diagram of part C is shown in FIG;

[0035] Figure 9 This invention Figure 6 An enlarged schematic diagram of portion D shown in FIG;

[0036] Figure 10 This invention Figure 3 A top sectional view of

[0037] Figure 11 This invention Figure 10 An enlarged schematic diagram of part E shown in FIG;

[0038] Figure 12 This invention Figure 10 An enlarged schematic diagram of part F shown in FIG;

[0039] Figure 13 It is a partial structural schematic diagram of the present invention;

[0040] Figure 14 The present invention Figure 13 An enlarged schematic diagram of part G shown in FIG;

[0041] Figure 15 It is a structural schematic diagram of the top material portion of the present invention;

[0042] Figure 16 This is a schematic diagram of the workpiece structure after injection molding by the device of the present invention;

[0043] Figure 17 The present invention Figure 15 An enlarged schematic diagram of section H is shown in FIG.

[0044] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0045] 1. Base; 2. Refrigeration box; 21. Water pump; 22. Drain pipe; 23. Return pipe; 3. Moving mold; 31. Casing; 4. Fixed mold; 5. Docking mechanism; 6. Injection molding machine; 7. Spraying mechanism; 8. Auxiliary mechanism; 9. Cleaning mechanism; 10. First electric push rod;

[0046] 501, first hollow column; 502, first set block; 503, first sliding rod; 504, retaining ring; 505, first compression spring; 506, first guide seat; 507, first stopper; 508, second hollow column; 509, second guide seat; 510, second set block; 511, second sliding rod; 512, second stopper; 513, second compression spring; 514, water outlet;

[0047] 701, annular liquid storage tank; 702, injection tube; 703, liquid inlet pipe; 704, airbag; 705, slide rail; 706, clamping block; 707, third compression spring; 708, hollow box; 709, piston rod; 710, blocking block; 711, fourth compression spring; 712, round rod; 713, trapezoidal block;

[0048] 81. Support frame; 82. Material lifting part; 83. Support plate; 84. Linkage part; 85. Control part;

[0049] 821, hollow rod; 822, moving rod; 823, fifth compression spring; 824, piston block;

[0050] 841. Rotating rod; 842. Winding roller; 843. Traction belt; 844. Gear; 845. Rack; 846. Limiting column;

[0051] 851, second electric push rod; 852, baffle; 853, first contact switch; 854, second contact switch;

[0052] 901. Push rod; 902. Fixed rod; 903. Air cylinder; 904. Piston plate; 905. Housing; 906. Moving block; 907. Spring; 908. Support plate; 909. Guide rod; 910. Air pipe; 911. Connecting rod. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0054] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0055] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it constitute a separate or selective embodiment that is mutually exclusive of other embodiments.

[0056] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0057] Please see the attached Figures 1 to 5 and Figure 13 As shown, this embodiment provides an injection molding device for toothbrush production, including a base 1, on which a movable mold 3 and a fixed mold 4 are provided, and both the movable mold 3 and the fixed mold 4 are provided with a contoured cooling groove; a docking mechanism 5, which is provided on the fixed mold 4 and the movable mold 3 and is used to connect the fixed mold 4 and the movable mold 3; an injection molding machine 6, which is fixedly mounted on the base 1 and is used for injection molding; a spraying mechanism 7, which is provided on the fixed mold 4 and is used to spray a release agent on the gate area; an auxiliary mechanism 8, which is provided on the base 1 and is used to assist in injection molding and demolding; a cleaning mechanism 9, which is provided on the fixed mold 4 and is used to clean the gate area;

[0058] Among them, the auxiliary mechanism 8 includes a support frame 81, which is fixedly connected to the base 1. The support frame 81 is provided with a top material part 82 distributed in an array. A support plate 83 is slidably connected in a slide groove opened on the base 1. The base 1 is provided with a linkage part 84 and a control part 85.

[0059] In this embodiment, one end of the linkage portion 84 is connected to the support plate 83, and the other end is connected to the refrigeration box 2, thereby driving the support plate 83 to slide within the chute. After injection molding is completed, the linkage portion 84 drives the support plate 83 to slide toward the movable mold 3. At this time, the ejector portion 82, supported by the support frame 81, ejects the molded toothbrush from the movable mold 3, achieving automatic demolding, greatly improving demolding efficiency, reducing manual labor, and lowering production costs. Furthermore, the provision of the contoured cooling trough ensures more uniform cooling, effectively avoiding deformation of the toothbrush due to uneven cooling, and improving the molding quality of the toothbrush.

[0060] After the mold is closed, the molding liquid is injected into the cavity after the mold is closed through the injection molding machine 6. The injection molding machine 6 adopts the products currently available on the market. When selecting the model, it should be selected to meet the requirements of this application as much as possible under the premise of being suitable for the specifications and usage scenarios. The specific model specifications are not limited here.

[0061] Next, please refer to Figure 1 and Figure 3 A slide groove is provided on the top surface of the base 1, and a refrigeration box 2 is slidably installed in the slide groove, and the refrigeration box 2 is fixedly connected to the movable mold 3. The fixed mold 4 is arranged next to the movable mold 3, and the fixed mold 4 is fixedly connected to the base 1. A first electric push rod 10 is also fixedly installed on the base 1, and the telescopic end of the first electric push rod 10 is fixedly connected to the refrigeration box 2, wherein a water pump 21 is installed on the refrigeration box 2, and the pumping end of the water pump 21 is connected to the refrigeration box 2, and the drainage end of the water pump 21 is installed with a drain pipe 22, and the drain pipe 22 is connected to the cooling groove on the movable mold 3, and the lower end of the fixed mold 4 is connected to a return pipe 23, and the return pipe 23 is connected to the refrigeration box 2.

[0062] In this embodiment, by controlling the telescopic action of the first electric push rod 10, the refrigeration box 2 can be moved, and the movable mold 3 can be moved accordingly to complete the operation of opening and closing the mold. Figure 1 As shown, the system is in the mold closing state at this time.

[0063] Secondly, please also refer to Figure 5 、 Figure 10 、 Figure 11 and Figure 12 The docking mechanism 5 includes a first hollow column 501, which is connected to the movable mold 3 in an array distribution, and the first hollow column 501 is connected to the cooling groove on the movable mold 3. The inner wall of the first hollow column 501 is fixedly connected to the first set block 502 by a support rod, and a first sliding rod 503 is slidably inserted at the center of the first set block 502. A retaining ring 504 is fixedly sleeved on the first sliding rod 503, and a first compression spring 505 is fixedly connected to one side of the retaining ring 504, and the other end of the first compression spring 505 is fixedly connected to the first set block 502. The inner wall of the first hollow column 501 is fixedly connected to the first guide seat 506, and one end of the first sliding rod 503 is fixedly connected to the first stopper. 507. The fixed mold 4 is connected with second hollow columns 508 in an array distribution, and the second hollow columns 508 are provided with water outlet holes 514, which are connected with the cooling groove on the fixed mold 4 through the water outlet holes 514. The inner wall of the second hollow column 508 is fixedly connected with a second guide seat 509, and the inner wall of the second hollow column 508 is fixedly connected with a second set block 510 by a support rod. A second sliding rod 511 is slidably inserted at the center of the second set block 510, and one end of the second sliding rod 511 is fixedly connected with a second stop block 512. The outer wall of one end of the second sliding rod 511 is provided with a second compression spring 513. The outer wall of the first hollow column 501 and the inner wall of the second hollow column 508 are both provided with a graphene coating.

[0064] In this embodiment, the extension of the first electric push rod 10 primarily propels the movable mold 3 toward the fixed mold 4, thereby completing the mold closing process. During the mold closing process, the first hollow column 501 embeds within the second hollow column 508. As the mold closing process progresses, the first sliding rod 503 begins to function, pushing the second stopper 512 along a predetermined trajectory. The movement of the second stopper 512 in turn drives the second sliding rod 511 to move accordingly, compressing the second compression spring 513 in the process. When the second compression spring 513 is compressed to a certain degree, the movement of the second sliding rod 511 is restricted, preventing further movement. At this point, the extension of the first hollow column 501 continues and continues forward, causing the first compression spring 505 to also begin to compress. Under the action of the first compression spring 505, the first sliding rod 503 pushes the first stopper 507, increasing the distance between the first stopper 507 and the first guide seat 506. Simultaneously, the second stopper 512 moves away from the second guide seat 509. This position change creates conditions for the flow of coolant, allowing the coolant to pass through. When the mold opening action is started, the first stopper 507 and the second stopper 512 each return to their initial positions under the reset force of the first compression spring 505 and the second compression spring 513. The first stopper 507 is close to the first guide seat 506, and the second stopper 512 is close to the second guide seat 509. At this time, the flow of coolant is effectively blocked, ensuring that the water flow will not flow out along the path of the first hollow column 501 or the second hollow column 508, thereby ensuring the sealing of the entire system and the safety of operation. The waterway is connected by docking the first hollow column 501 and the second hollow column 508, reducing the external equipment of the pipeline.

[0065] During the injection molding process, it is first necessary to start the water pump 21. The function of the water pump 21 is to extract the coolant in the refrigeration box 2. After extraction, the coolant will flow to the movable mold 3 through the drain pipe 22 and enter the pre-designed cooling groove on the movable mold 3. Then, the coolant will continue to move along the channel of the first hollow column 501 until it reaches the second hollow column 508. In the second hollow column 508, the coolant will flow out through the water outlet 514 set on the column body, and then flow into the cooling groove on the fixed mold 4. In the cooling groove of the fixed mold 4, after the coolant completes its cooling task, it will return to the refrigeration box 2 through the return pipe 23, thereby completing a complete cooling cycle. It is worth noting that the return pipe 23 is designed as a retractable hose, which can provide greater flexibility and adaptability. Through the coolant circulation flow path designed in this way, the injection molded parts can be effectively cooled to ensure the quality and production efficiency of the injection molded parts.

[0066] The function of the refrigeration box 2 is to store the coolant and cool the coolant. The refrigeration box 2 uses products currently available on the market. When selecting a model, you should try to choose one that meets the requirements of this application under the premise that the specifications and usage scenarios are suitable. The specific model specifications are not limited here.

[0067] During simultaneous cooling during injection molding, a condensation layer forms. Specifically, when the melt contacts the cold mold surface, the surface rapidly cools to below the glass transition temperature (Tg), forming a solidified layer approximately 0.1 to 0.3 mm thick. This solidified layer prevents melt backflow, ensuring effective transfer of filling pressure and reducing surface defects such as flash and sink marks. Furthermore, the surface solidified layer constrains the flow direction of the internal melt, improving molecular orientation.

[0068] Next, please refer to Figure 3 、 Figure 4 、 Figure 8 and Figure 9 The spraying mechanism 7 includes an annular liquid storage tank 701, which is opened on the fixed mold 4. An injection tube 702 is fixedly connected to the center of the annular liquid storage tank 701, and the injection tube 702 is located at the annular liquid storage tank 701 and has micropores distributed in an array. The injection tube 702 is connected to the discharge end of the injection molding machine 6. A liquid inlet pipe 703 is fixedly connected to the fixed mold 4, and the liquid inlet pipe 703 is connected to the annular liquid storage tank 701. An air bag 704 is provided on the liquid inlet pipe 703. A slide rail 705 is provided on the top surface of the mold 4, and two clamping blocks 706 are slidably connected to the slide rail 705, and a third compression spring 707 is sleeved on the slide rail 705. A hollow box 708 is also connected to the liquid inlet pipe 703, and a piston rod 709 is piston-type inserted at one end of the hollow box 708. A blocking block 710 is fixedly connected to one end of the piston rod 709, and a fourth compression spring 711 is sleeved on the outer wall of one end of the piston rod 709. A round rod 712 and a trapezoidal block 713 are fixedly connected to the movable mold 3.

[0069] In this embodiment, the liquid inlet pipe 703 is connected to an external release agent storage box, ensuring that the release agent can flow smoothly along the liquid inlet pipe 703 into the annular liquid storage tank 701. During the mold closing operation, the round rod 712 first contacts the piston rod 709, pushing the piston rod 709 and the blocking block 710 to the right. This action simultaneously compresses the fourth compression spring 711. The blocking block 710 then effectively seals the upper end of the liquid inlet pipe 703. Next, the two trapezoidal blocks 713 contact the two clamping blocks 706. This contact forces the clamping blocks 706 toward each other and further compresses the third compression spring 707. As the clamping blocks 706 approach each other, they squeeze the airbag 704, causing it to shrink. As the airbag 704 shrinks, the release agent inside is squeezed, causing it to flow downward. After being pressurized, the release agent in the annular liquid storage tank 701 seeps out through the micropores in the injection tube 702. This exuded release agent is evenly applied to the inner wall of the injection tube 702, effectively preventing the injection molding liquid from adhering to the inner wall of the injection tube 702, thereby simplifying the subsequent demolding process. When the mold opening operation begins and the movable mold 3 separates from the fixed mold 4, the blocking block 710 and the clamping block 706 automatically return to their initial positions under the reset force of the fourth compression spring 711 and the third compression spring 707. At the same time, the airbag 704 also returns to its original state, and the release agent continues to flow downward along the liquid inlet tube 703, preparing for the next injection process.

[0070] It should be noted that the micropores on the injection tube 702 only allow the release agent to penetrate, and do not allow the injection liquid to enter. The specific pore diameter and arrangement are not limited here.

[0071] Please refer again Figure 10 、 Figure 15 and Figure 17 The ejecting portion 82 includes a hollow rod 821, which is fixedly connected to the support frame 81. One end of the hollow rod 821 is piston-connected with a moving rod 822. The outer wall of the moving rod 822 is provided with a fifth compression spring 823. One end of the moving rod 822 is fixedly connected with a piston block 824. The movable mold 3 is connected with a sleeve 31 in an array distribution, and the hollow rod 821 is piston-connected in the sleeve 31. The end of the hollow rod 821 near the movable mold 3 is provided with micropores in an array distribution.

[0072] In this embodiment, the movement of the movable rod 822 drives the piston block 824 to reciprocate along the inner cavity of the hollow rod 821, which can realize the operation of evacuating or exhausting the chamber. After the mold closing action is completed, this mechanism can effectively evacuate the chamber, thereby ensuring that the desired vacuum level is achieved inside the chamber. In addition, during the demolding process, the movement of the piston block 824 can blow gas into the chamber. The purpose of this is to facilitate the smooth separation of the molded workpiece, ensure a smooth demolding process and ensure the integrity of the product.

[0073] It should be noted that the micropores opened at the end of the hollow rod 821 only allow air to circulate but do not allow the injection liquid to enter. The specific pore diameter and arrangement are not limited here.

[0074] It should be noted that hollow rod 821 comprises a sleeve rod and an insert rod. The insert rod is piston-mounted within the sleeve rod, with a metal spring fixedly connected between the two. During demolding, the insert rod slides into the sleeve rod, compressing the metal spring and leaving a certain amount of travel for demolding. Specifically, during demolding, the formed workpiece is first ejected from the fixed mold 4 by components of the cleaning mechanism 9. At this point, the workpiece remains in the movable mold 3. The workpiece is squeezed by the insert rod, causing it to slide into the sleeve rod. When the insert rod reaches its maximum travel, it can no longer retract into the sleeve rod, thereby ejecting the workpiece from the movable mold 3.

[0075] Please refer again Figure 13 and Figure 14 The linkage part 84 includes a rotating rod 841, which is rotatably connected to the base 1. A winding roller 842 is fixedly installed on the upper end of the rotating rod 841, and a traction belt 843 is fixedly connected to the winding roller 842. The other end of the traction belt 843 is fixedly connected to the support plate 83. A gear 844 is fixedly installed on the lower end of the rotating rod 841, and a rack 845 is fixedly connected to the side of the refrigeration box 2. A limiting column 846 is provided at the traction belt 843.

[0076] In this embodiment, the movement of the refrigeration box 2 is used to drive the displacement of the rack 845. The rack 845 and the gear 844 interact with each other through meshing transmission, so that the rotating rod 841 can rotate forward or reverse to perform the winding or unwinding operation. When the refrigeration box 2 moves to the right, the unwinding operation is performed. Once the mold closing process is completed, the reset force of the fifth compression spring 823 will play a role, prompting the moving rod 822 to drive the piston block 824 to move to the left to perform the exhaust operation. On the contrary, when the refrigeration box 2 moves to the left, the winding operation is performed, and this action will simultaneously drive the support frame 81 to move to the right. At this time, the support frame 81 will push the moving rod 822 and the piston block 824 to move to the right together, thereby performing the exhaust operation.

[0077] Please refer again Figure 13 and Figure 14 The control unit 85 includes a second electric push rod 851, which is fixedly mounted on the base 1. The telescopic end of the second electric push rod 851 is fixedly connected to a baffle 852. The top surface of the base 1 is also fixedly mounted with a first contact switch 853 and a second contact switch 854.

[0078] In this embodiment, during the mold closing process, meshing transmission occurs between the rack 845 and the gear 844, driving the rotation of the rotating rod 841. As the rotating rod 841 rotates, the take-up roller 842 also begins to rotate, performing the unwinding operation. During this process, the support plate 83 is restricted by the baffle 852 and cannot move to the left. After the movable mold 3 and the fixed mold 4 complete the mold closing operation, the crossbar on the right side of the refrigeration box 2 contacts the first contact switch 853, triggering the subsequent operation. Immediately thereafter, the second electric push rod 851 begins to shorten, driving the baffle 852 to move. At this point, the support plate 83 loses its previous restraint, and the movable rod 822 begins to move leftward under the restoring force of the fifth compression spring 823. Driven by the multiple movable rods 822, the support plate 83 also begins to move leftward. Simultaneously, the piston block 824 also moves leftward, following the movable rod 822, performing the vacuum operation. The right end of the hollow rod 821 is designed with a micro hole, so that after the mold is closed, a vacuum operation can be implemented in the mold cavity to achieve the expected process effect.

[0079] During the mold opening process, movable mold 3 moves leftward, and hollow rod 821 acts to eject the workpiece formed within movable mold 3, thereby achieving the purpose of automatic unloading. Furthermore, during the mold opening process, refrigeration box 2 drives rack 845 to move leftward. The movement of rack 845 in turn drives rotating rod 841 and winding roller 842 to rotate, performing the winding operation. During the winding process, traction belt 843 drives support plate 83 to the right. The movement of support plate 83 pushes multiple movable rods 822 and piston block 824 to the right, compressing fifth compression spring 823. When piston block 824 moves rightward, it pushes the gas in hollow rod 821 out, and the gas is discharged through the micropores at the right end of hollow rod 821. The discharged gas acts on the molded workpiece, blowing it away, effectively preventing the workpiece from adhering to hollow rod 821 after injection molding, which is very beneficial for the automatic unloading process. When the crossbar on the left side of the refrigeration box 2 contacts the second contact switch 854, the second electric push rod 851 extends, driving the baffle 852 to move. At this time, the baffle 852 returns to its original position and continues to limit the support plate 83. When the crossbar on the left side of the refrigeration box 2 contacts the second contact switch 854, the support plate 83 has moved to the right of the baffle 852.

[0080] Please refer again Figures 5 to 9The cleaning mechanism 9 includes a push rod 901, which is piston-type and inserted into the injection tube 702. The bottom surface of the fixed mold 4 is fixedly connected with a fixed rod 902, one end of the fixed rod 902 is provided with an air cylinder 903, and one end of the fixed rod 902 is fixedly connected to a piston plate 904. A connecting rod 911 is fixedly connected to the refrigeration box 2, and the other end of the connecting rod 911 is fixedly connected to a sleeve 905. A moving block 906 is slidably connected to the sleeve 905, and the moving block 906 is inserted into the bottom of the air cylinder 903. , springs 907 are fixedly connected to both sides of the moving block 906, and the other end of the spring 907 is fixedly connected to the sleeve 905, a support plate 908 is fixedly connected between the air cylinder 903 and the ejector rod 901, a guide rod 909 is slidably inserted on the support plate 908, and the guide rod 909 is fixedly connected to the fixed mold 4, and an air pipe 910 is also connected between the air cylinder 903 and the ejector rod 901, wherein an air groove is opened inside the ejector rod 901, and micropores are opened in a ring-shaped distribution at the pointed cone end of the ejector rod 901.

[0081] In the present embodiment, when the movable mold 3 moves to the left, it will drive the sleeve 905 to move to the left through the fixed rod 902. The left movement of the sleeve 905 will further drive the movable block 906 to move to the left, and the left movement of the movable block 906 will prompt the air cylinder 903 to move to the left. The left movement of the air cylinder 903 will drive the support plate 908 and the push rod 901 to move to the left together. The left movement of the push rod 901 pushes the workpiece out of the injection molding tube 702, thereby preventing the workpiece from adhering to the inner wall of the injection molding tube 702. In addition, when the air cylinder 903 moves to the left, it will be affected by the piston plate 904 and the air inside will be compressed. This compressed air will be transmitted to the inside of the push rod 901 along the air pipe 910 and eventually discharged from the end of the push rod 901. In this way, the compressed air can blow out residual impurities inside the injection tube 702, thereby cleaning the injection tube 702, ensuring the cleanliness of the injection tube 702 and preventing these residual impurities from adversely affecting the subsequent injection molding process. The moving block 906 is fixedly connected to the housing 905 via a spring 907. When the ejector 901 encounters significant resistance during movement, the spring 907 can provide a certain degree of cushioning, thereby preventing damage to the workpiece caused by rigid blanking.

[0082] It should be noted that the micropores formed at the end of the ejector pin 901 only allow air to circulate but do not allow the injection liquid to enter. The specific pore diameter and arrangement are not limited herein.

[0083] The working principle of the present invention is:

[0084] Mold closing process

[0085] The movable mold 3 and the fixed mold 4 are docked: First, the first electric push rod 10 pushes the movable mold 3 toward the fixed mold 4 to complete the mold closing action. During this process, the first hollow column 501 on the movable mold 3 is embedded in the second hollow column 508 on the fixed mold 4, forming a water channel connection.

[0086] The linkage mechanism is activated: as the mold closing action proceeds, the first sliding rod 503 and the second sliding rod 511 are displaced accordingly under the action of the compression spring, ensuring that the coolant can flow smoothly.

[0087] Injection molding and cooling

[0088] Injection molding machine operation: After the mold is closed, the injection molding machine 6 injects the molten plastic into the cavity formed by the movable mold 3 and the fixed mold 4.

[0089] Cooling system operation: Water pump 21 draws coolant from refrigeration tank 2, which flows through drain pipe 22 into the cooling tank of movable mold 3. The coolant then passes through first hollow column 501 and second hollow column 508 to the cooling tank of fixed mold 4, effectively cooling the molded part. The coolant ultimately returns to refrigeration tank 2 through return pipe 23, completing the cycle.

[0090] Demolding preparation and execution

[0091] Spraying release agent: Before each injection, the spraying mechanism 7 will automatically apply release agent to the gate area to prevent the injection liquid from adhering to the inner wall of the injection tube 702.

[0092] Automatic demoulding: After injection molding and cooling are completed, the auxiliary mechanism 8 ejects the molded toothbrush from the movable mold 3 through the ejector 82, achieving automatic demoulding. During this process, the movement of the piston block 824 can evacuate or exhaust the chamber, helping to separate the workpiece.

[0093] Cleaning and maintenance

[0094] Function of the cleaning mechanism 9: After the mold is opened, the cleaning mechanism 9 removes residual impurities in the injection tube 702 through the combined action of the ejector 901 and compressed air, ensuring the cleanliness of the tube and preparing for the next injection molding.

[0095] The foregoing is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained herein shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. An injection molding device for toothbrush production, characterized in that: The invention comprises a base, a movable mold and a fixed mold are arranged on the base, and both the movable mold and the fixed mold are provided with a contoured cooling groove; The docking mechanism is provided on the fixed mold and the movable mold and is used to connect the fixed mold and the movable mold; Injection molding machine, the injection molding machine is fixedly installed on the base and is used for injection molding; The spraying mechanism is arranged on the fixed mold and is used to spray the release agent on the gate area; An auxiliary mechanism is provided on the base and is used to assist injection molding and demoulding; Cleaning mechanism, which is provided on the fixed mold and is used to clean the gate area; Among them, the auxiliary mechanism includes a support frame, which is fixedly connected to the base, and the support frame is provided with a lifting part distributed in an array, a support plate is slidably connected in a slide groove provided on the base, and a linkage part and a control part are provided on the base; A slide groove is provided on the top surface of the base, and a refrigeration box is slidably installed in the slide groove, and the refrigeration box is fixedly connected to the movable mold, the fixed mold is arranged next to the movable mold, and the fixed mold is fixedly connected to the base, and a first electric push rod is fixedly installed on the base, and the telescopic end of the first electric push rod is fixedly connected to the refrigeration box, wherein a water pump is installed on the refrigeration box, and the water pumping end of the water pump is connected to the refrigeration box, and the drainage end of the water pump is installed with a drainage pipe, and the drainage pipe is connected to the cooling groove on the movable mold, and the lower end of the fixed mold is connected to a return pipe, and the return pipe is connected to the refrigeration box; The spraying mechanism includes an annular liquid storage tank, which is opened on the fixed mold. An injection tube is fixedly connected to the center of the annular liquid storage tank, and the injection tube is provided with micropores distributed in an array at the annular liquid storage tank. The injection tube is connected to the discharge end of the injection molding machine, and a liquid inlet pipe is fixedly connected to the fixed mold, and the liquid inlet pipe is connected to the annular liquid storage tank. An air bag is provided on the liquid inlet pipe, and a slide rail is provided on the top surface of the fixed mold. Two clamping blocks are slidably connected to the slide rail, and a third compression spring is provided on the slide rail. A hollow box is also connected to the liquid inlet pipe, and a piston rod is piston-type inserted at one end of the hollow box, and a sealing block is fixedly connected to one end of the piston rod. A fourth compression spring is provided on the outer wall of one end of the piston rod, and a round rod and a trapezoidal block are fixedly connected to the movable mold.

2. The injection molding equipment for toothbrush production according to claim 1, characterized in that: The docking mechanism includes a first hollow column, the first hollow column is connected to the movable mold in an array distribution, and the first hollow column is communicated with the cooling groove on the movable mold, the inner wall of the first hollow column is fixedly connected to the first block by a support rod, the center of the first block is slidably inserted into the first sliding rod, the first sliding rod is fixedly sleeved with a retaining ring, one side of the retaining ring is fixedly connected to the first compression spring, and the other end of the first compression spring is fixedly connected to the first block. The inner wall of the first hollow column is fixedly connected to the first guide seat, and the second hollow column is connected to the fixed mold in an array distribution, and the second hollow column is provided with a water outlet hole, which is communicated with the cooling groove on the fixed mold. The inner wall of the second hollow column is fixedly connected to the second guide seat, and the inner wall of the second hollow column is fixedly connected to the second block by a support rod, the center of the second block is slidably inserted with the second sliding rod, one end of the second sliding rod is fixedly connected to the second stop, and the outer wall of one end of the second sliding rod is sleeved with a second compression spring.

3. The injection molding equipment for toothbrush production according to claim 1, characterized in that: The ejecting part includes a hollow rod, which is fixedly connected to the support frame. One end of the hollow rod is piston-connected with a moving rod. The outer wall of the moving rod is sleeved with a fifth compression spring. One end of the moving rod is fixedly connected to a piston block.

4. The injection molding equipment for toothbrush production according to claim 1, characterized in that: The linkage part includes a rotating rod, which is rotatably connected to the base. A winding roller is fixedly installed on the upper end of the rotating rod, and a traction belt is fixedly connected to the winding roller. The other end of the traction belt is fixedly connected to the support plate. A gear is fixedly installed on the lower end of the rotating rod, and a rack is fixedly connected to the side of the refrigeration box. A limiting column is provided at the traction belt.

5. The injection molding equipment for toothbrush production according to claim 1, characterized in that: The control unit includes a second electric push rod, which is fixedly installed on the base. The telescopic end of the second electric push rod is fixedly connected to the baffle, and the top surface of the base is also fixedly installed with a first contact switch and a second contact switch.

6. The injection molding equipment for toothbrush production according to claim 1, characterized in that: The cleaning mechanism includes a push rod, which is piston-inserted in the injection molding tube. The bottom surface of the fixed mold is fixedly connected to a fixed rod, one end of the fixed rod is provided with an air cylinder, and one end of the fixed rod is fixedly connected to a piston plate. A connecting rod is fixedly connected to the refrigeration box, and the other end of the connecting rod is fixedly connected to a sleeve shell. A moving block is slidably connected to the sleeve shell, and the moving block is inserted in the bottom of the air cylinder. Both sides of the moving block are fixedly connected with a spring, and the other end of the spring is fixedly connected to the sleeve shell. A support plate is fixedly connected between the air cylinder and the push rod, and a guide rod is slidably inserted on the support plate, and the guide rod is fixedly connected to the fixed mold. An air pipe is also connected between the air cylinder and the push rod, wherein an air groove is provided inside the push rod, and micropores are provided in a ring-shaped distribution at the pointed cone end of the push rod.

7. The injection molding equipment for toothbrush production according to claim 3, characterized in that: The movable mold is connected with sleeves distributed in an array, and the hollow rod is inserted into the sleeves in a piston-like manner.

8. The injection molding equipment for toothbrush production according to claim 2, characterized in that: The outer wall of the first hollow column and the inner wall of the second hollow column are both provided with a graphene coating.

Images