In-mold injection molding device

Abstract

The utility model discloses an in-mold injection molding device, which relates to the technical field of in-mold injection molding, and comprises an upper mounting seat, a support column is fixedly mounted on the inner side surface of the upper mounting seat, a mold opening and closing oil cylinder is arranged at the top end of the upper mounting seat, a feeding mechanism is arranged at the top end of an upper injection molding plate, the feeding mechanism comprises a bracket, and the bracket is fixedly mounted on the upper mounting seat. A funnel is arranged at the top end of the bracket; a lower mounting seat is fixedly mounted on the bottom face of the supporting column, a lower injection molding plate is fixedly mounted at the top end of the lower mounting seat, a circulating pipe is fixedly mounted at the inner end of the lower mounting seat, and a water pump and a condenser are connected to the connecting position of the circulating pipe. According to the in-mold injection molding device, the mold opening and closing oil cylinders are started, the mold opening and closing oil cylinders drive the telescopic rods to stretch out and draw back, the telescopic rods drive the upper injection molding plate to move, the upper injection molding plate moves along the supporting columns, and the upper injection molding plate is prevented from shifting, so that the upper injection molding plate and the lower injection molding plate are subjected to extrusion molding, uneven foaming is avoided, and the injection molding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of in-mold injection molding technology, specifically to an in-mold injection molding device. Background Technology

[0002] In-mold injection molding refers to the decorative molding technology of inserting parts into the mold. It involves injecting resin onto the back of a molded sheet, allowing the resin to bond with the sheet and cure into a single unit. The product is laminated with a decorative printing substrate, and the entire three-dimensional molded product can be decorated and printed, achieving a combination of decorative and functional effects.

[0003] However, existing injection molding equipment requires the temperature inside the injection cavity to cool down to a certain range in order to ensure complete molding. Most in-mold injection molding equipment does not have auxiliary heat dissipation facilities and relies on natural heat dissipation, which results in slow heat dissipation efficiency and greatly reduces work efficiency when performing large-scale injection molding.

[0004] To address the aforementioned deficiencies, Chinese Patent Publication No. CN212422084U discloses a high-efficiency heat dissipation in-mold injection molding device. An upper mold base is positioned above a lower mold base. Both the lower and upper ends of the upper and lower mold bases have injection mold cavities. The upper mold base has a through hole inside. A threaded screw is positioned above the lower mold base. The upper mold base also has heat dissipation holes inside. A cover plate is positioned above the upper mold base, and the cover plate has pre-drilled holes inside. A condenser pipe is positioned outside the injection mold cavity. A water tank is positioned inside the lower mold base. A water pump is installed on one side of the water tank, and rubber hoses are installed on both sides of the water pump. Water is injected into the condenser through the condenser pipe, the water pump, and the condenser. The temperature difference between the two pipes can absorb the heat inside the mold base, thereby achieving a heat dissipation effect. The water pump can realize the circulation of water, improving water utilization efficiency. The condenser can cool the water tank, lower the temperature of the water inside the tank, thereby increasing the water's heat absorption capacity and absorbing and neutralizing heat more quickly. This solves the problem of quickly absorbing and neutralizing the heat inside the mold base, achieving efficient heat dissipation.

[0005] Furthermore, in the prior art, Chinese Patent Publication No. CN221872922U discloses an efficient heat dissipation in-mold injection molding device, including a base. A through groove is formed on the top surface of the base. A lower mold base for injection is fixedly installed on the upper half of the inner wall of the through groove. A condenser pipe is provided on the bottom surface of the inner cavity of the through groove. A horizontal plate is fixedly installed on the inner wall of the through groove between the condenser pipe and the lower mold base. An air pipe is connected to the top surface of the horizontal plate. The bottom surface of the air pipe penetrates the horizontal plate and is located below it. A distributor is fixedly connected to the top of the air pipe. Connecting pipes are fixedly connected to both sides of the distributor. The inner walls of both sides of the through groove, located between the horizontal plate and the lower mold base... Support rings are fixedly installed between each part, and two connecting pipes are respectively fitted into the inner cavity of the support rings. A support plate is fixedly connected to one side of the distributor. Through the setting of the condenser pipe, the external coolant is delivered to the inner cavity of the base, thereby cooling the lower mold base. The distributor setting can deliver cold air to the connecting pipe through the air pipe and spray it out, thereby cooling the lower mold base, avoiding the need for natural cooling of the injection molded parts, and improving the processing efficiency of the injection molded parts. Through the setting of the support block, the condenser pipe can be bent, thereby expanding the effect of cold air diffusion of the condenser pipe. The setting of the inlet and outlet facilitates the addition of coolant into the condenser pipe.

[0006] The device described above utilizes water circulation during use to quickly absorb heat from inside the mold base. However, during material feeding, the mixing end of the device leaves the air inlet, resulting in the next feeding containing a portion of material that has not been mixed with the air, leading to uneven foaming and affecting the processing quality. Utility Model Content

[0007] The purpose of this invention is to provide an in-mold injection molding device to solve the problem of uneven foaming in the equipment mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an in-mold injection molding device, comprising an upper mounting base, a support column fixedly mounted on the inner side of the upper mounting base, a mold opening and closing cylinder provided at the top of the upper mounting base, a telescopic rod movably mounted on the outer surface of the mold opening and closing cylinder, an upper injection plate fixedly mounted on the bottom surface of the telescopic rod, a feeding mechanism provided at the top of the upper injection plate, the feeding mechanism including a bracket, and a funnel provided at the top of the bracket; a lower mounting base fixedly mounted on the bottom surface of the support column, a lower injection plate fixedly mounted at the top of the lower mounting base, a circulation pipe fixedly mounted at the inner end of the lower mounting base, and a water pump and a condenser connected to the connection points of the circulation pipe respectively.

[0009] Furthermore, the feeding mechanism also includes a drive motor, which is fixedly mounted on the outer surface of the bracket. The output end of the drive motor is connected to an auger, and a discharge cylinder is fixedly mounted on the outer surface of the bracket.

[0010] Furthermore, a protective shell is fixedly installed on the outer surface of the discharge cylinder, and a discharge pipe is provided at the inner end of the protective shell, with an auger at one end of the discharge pipe.

[0011] Furthermore, a sealing cover is provided at the top of the lower mounting base, and evenly spaced connecting rods are fixedly installed on both sides of the sealing cover. The lower mounting base is fixedly installed on the outer surface of the connecting rods.

[0012] Furthermore, a buffer spring is provided on the side of the sealing cover near the fixedly installed lower injection molded plate, and a clamping plate is fixedly installed on the outer surface of the buffer spring. There are two sets of clamping plates, and the two sets of clamping plates are symmetrical.

[0013] Furthermore, the outer surface of the clamping plate movably abuts against the lower injection-molded plate, and the bottom surface of the clamping plate movably abuts against the lower mounting base.

[0014] Furthermore, an upper injection-molded plate is movably installed on the inner side of the support column, and a heat dissipation groove is formed on the inner side of the upper injection-molded plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] (1) By starting the mold opening and closing cylinder, the mold opening and closing cylinder drives the telescopic rod to extend and retract, the telescopic rod drives the upper injection plate to move, and the upper injection plate moves along the support column to avoid the upper injection plate from shifting, so that the upper injection plate and the lower injection plate are extruded and molded, which facilitates the heating and foaming of the material, avoids uneven foaming, and improves the efficiency of injection molding.

[0017] (2) By injecting water into the circulation pipe installed on the lower mounting base, the heat inside the injection mold can be absorbed by utilizing the temperature difference between the two, thereby achieving the effect of heat dissipation.

[0018] (3) In addition, the water pump can realize the recycling of water and improve the utilization efficiency of water. The condenser can cool the water being transported and ensure that the mold is cooled quickly after injection molding.

[0019] (4) The material is injected through the funnel set by the bracket. The drive motor is started and the drive motor drives the auger to rotate. The auger transports the injected material and ensures that the material is fully mixed during the transport, so as to avoid the generation of air bubbles during injection molding and improve the quality of foaming.

[0020] (5) The material is then conveyed to the discharge pipe by the auger. The discharge pipe is connected to the injection groove in the upper injection plate, so as to ensure that the molded product is decorated and printed during injection molding, and to ensure that the product's decoration and functionality meet the standards. The sealing cover set by the lower mounting seat ensures the sealing of the upper and lower injection plates during injection molding, and prevents air from entering the interior and causing bubbles.

[0021] (6) The connecting rods are used to fix and support the sealing cover, and the sealing cover is used to improve the safety during foaming, prevent personnel from accidentally touching the heating equipment during equipment operation, thereby causing injury to personnel and increasing the stability of the equipment.

[0022] (7) The clamping plate is driven by the buffer spring to clamp and fix the lower injection plate. When the upper and lower injection plates are being injected, the clamping plate is used to seal the heat dissipation holes of the upper injection plate. This reduces the diffusion of heat during the heating and foaming process, thereby reducing the probability of unstable foaming due to insufficient heat and improving the molding efficiency. It can also prevent the leakage of molten material during injection and ensure that the heat during injection remains stable, thus improving the quality of injection molding. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a three-dimensional structural diagram of the lower mounting base of this utility model;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the discharge cylinder of this utility model;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the upper injection molding plate of this utility model;

[0027] Figure 5 This is a schematic diagram of the cross-sectional structure of the sealing cover of this utility model;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of the clamping plate of this utility model.

[0029] In the diagram: 1. Upper mounting base; 2. Support column; 3. Lower mounting base; 4. Mold opening and closing cylinder; 5. Telescopic rod; 6. Upper injection plate; 7. Bracket; 8. Drive motor; 9. Screw; 10. Discharge cylinder; 11. Discharge pipe; 12. Protective shell; 13. Circulation pipe; 14. Lower injection plate; 15. Clamping plate; 16. Buffer spring; 17. Sealing cover; 18. Connecting rod. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1: Please refer to Figures 1-2 The present invention provides the following technical solution: an in-mold injection molding device, including an upper mounting base 1, a support column 2 fixedly mounted on the inner side of the upper mounting base 1, an opening and closing cylinder 4 provided at the top of the upper mounting base 1, a telescopic rod 5 movably mounted on the outer surface of the opening and closing cylinder 4, an upper injection plate 6 fixedly mounted on the bottom surface of the telescopic rod 5, a feeding mechanism provided at the top of the upper injection plate 6, the feeding mechanism including a bracket 7, a funnel provided at the top of the bracket 7; a lower mounting base 3 fixedly mounted on the bottom surface of the support column 2, a lower injection plate 14 fixedly mounted at the top of the lower mounting base 3, a circulation pipe 13 fixedly mounted at the inner end of the lower mounting base 3, and a water pump and a condenser connected to the connection of the circulation pipe 13 respectively.

[0032] By activating the mold opening and closing cylinder 4, the mold opening and closing cylinder 4 drives the telescopic rod 5 to extend and retract. The telescopic rod 5 drives the upper injection plate 6 to move. The upper injection plate 6 moves along the support column 2 to prevent the upper injection plate 6 from shifting, thereby enabling the upper injection plate 6 and the lower injection plate 14 to be extruded and molded. This facilitates the heating and foaming of the material, avoids uneven foaming, and improves the efficiency of injection molding.

[0033] Furthermore, by injecting water into the circulation pipe 13 set in the lower mounting base 3, the heat inside the injection mold can be absorbed by utilizing the temperature difference between the two, thereby achieving the heat dissipation effect. The water can be circulated by the water pump, improving the water utilization efficiency. The condenser can cool the transmitted water. The water pump and condenser are existing technologies and are not shown in the figure. This solution will not elaborate on them in detail, ensuring rapid cooling of the mold after injection molding.

[0034] Example 2: Based on Example 1, please refer to... Figures 2-5 The material discharge cylinder 10 is also disclosed, and its specific structure is as follows: The feeding mechanism also includes a drive motor 8, which is fixedly installed on the outer surface of the bracket 7. The output end of the drive motor 8 is connected to an auger 9. The material discharge cylinder 10 is fixedly installed on the outer surface of the bracket 7. A protective shell 12 is fixedly installed on the outer surface of the material discharge cylinder 10. A material discharge pipe 11 is provided at the inner end of the protective shell 12. An auger 9 is provided at one end of the material discharge pipe 11. A sealing cover 17 is provided at the top of the lower mounting base 3. Evenly spaced connecting rods 18 are fixedly installed on both sides of the sealing cover 17. The lower mounting base 3 is fixedly installed on the outer surface of the connecting rods 18.

[0035] Material is injected through the funnel set in bracket 7. The drive motor 8 is activated, causing the auger 9 to rotate. Figure 3As can be seen, the auger 9 transports the injected material and ensures that the material is fully mixed during the transport, avoiding the generation of air bubbles during injection molding and improving the quality of foaming. Then, the auger 9 transports the material to the discharge pipe 11, which is connected to the injection groove in the injection plate 6, thereby ensuring that the molded product can be decorated and printed during injection molding, and ensuring that the product's decoration and functionality meet the standards.

[0036] Depend on Figure 2 , Figure 4 and Figure 5 It can be seen that the sealing cover 17 set by the lower mounting base 3 ensures the sealing of the upper injection plate 6 and the lower injection plate 14 during injection molding, preventing air from entering the interior and causing bubbles to form. The sealing cover 17 is fixedly supported by the connecting rod 18. The sealing cover 17 also improves the safety during foaming, preventing personnel from accidentally touching the heating equipment during equipment operation, thus preventing personnel injury and increasing the stability of the equipment.

[0037] Example 3: Based on Example 1, please refer to... Figures 3-6 The clamping plate 15 is also disclosed, and its specific structure is as follows: A buffer spring 16 is provided on the side of the sealing cover 17 near the fixed installation of the lower injection molded plate 14. The clamping plate 15 is fixedly installed on the outer surface of the buffer spring 16. There are two sets of clamping plates 15, and the two sets of clamping plates 15 are symmetrical. The outer surface of the clamping plate 15 is movably abutting against the lower injection molded plate 14. The bottom surface of the clamping plate 15 is movably abutting against the lower mounting base 3. The inner side of the support column 2 is movably installed with the upper injection molded plate 6. The inner side of the upper injection molded plate 6 is provided with heat dissipation grooves.

[0038] Depend on Figure 6 It is known that the clamping plate 15 is driven by the buffer spring 16 to clamp and fix the lower injection plate 14. When the upper injection plate 6 and the lower injection plate 14 are injection molded, heating components are provided inside the upper injection plate 6 and the lower injection plate 14. The heating components are existing technology and will not be described in detail in this solution.

[0039] Heating components are used to heat the injection mold, and the heat dissipation holes on the upper injection plate 6 are sealed by the clamping plate 15. This reduces heat diffusion during the heating and foaming process, thereby reducing the chance of unstable foaming due to insufficient heat, improving molding efficiency, preventing molten material leakage during injection, ensuring stable heat during injection, and improving the quality of injection molding.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An in-mold injection molding apparatus, comprising an upper mounting base (1), wherein a support column (2) is fixedly mounted on the inner side of the upper mounting base (1), characterized in that: The top of the upper mounting base (1) is provided with a mold opening and closing cylinder (4), and a telescopic rod (5) is movably installed on the outer surface of the mold opening and closing cylinder (4). The bottom surface of the telescopic rod (5) is fixedly installed with an upper injection plate (6). The top of the upper injection plate (6) is provided with a feeding mechanism. The feeding mechanism includes a bracket (7), and the top of the bracket (7) is provided with a funnel. The bottom surface of the support column (2) is fixedly installed with a lower mounting base (3), the top of the lower mounting base (3) is fixedly installed with a lower injection molding plate (14), the inner end of the lower mounting base (3) is fixedly installed with a circulation pipe (13), and the connection of the circulation pipe (13) is connected to a water pump and a condenser respectively.

2. The in-mold injection molding apparatus according to claim 1, characterized in that: The feeding mechanism also includes a drive motor (8), which is fixedly installed on the outer surface of the bracket (7). The output end of the drive motor (8) is connected to an auger (9), and a discharge cylinder (10) is fixedly installed on the outer surface of the bracket (7).

3. The in-mold injection molding apparatus according to claim 2, characterized in that: A protective shell (12) is fixedly installed on the outer surface of the discharge cylinder (10), and a discharge pipe (11) is provided at the inner end of the protective shell (12). An auger (9) is provided at one end of the discharge pipe (11).

4. The in-mold injection molding apparatus according to claim 1, characterized in that: The lower mounting base (3) is provided with a sealing cover (17) at its top end. The sealing cover (17) is fixedly installed with uniform connecting rods (18) on both sides. The lower mounting base (3) is fixedly installed on the outer surface of the connecting rods (18).

5. The in-mold injection molding apparatus according to claim 4, characterized in that: A buffer spring (16) is provided on the side of the sealing cover (17) near the fixedly installed lower injection molded plate (14). A clamping plate (15) is fixedly installed on the outer surface of the buffer spring (16). There are two sets of clamping plates (15), and the two sets of clamping plates (15) are symmetrical.

6. The in-mold injection molding apparatus according to claim 5, characterized in that: The outer surface of the clamping plate (15) is movably abutted against the lower injection molding plate (14), and the bottom surface of the clamping plate (15) is movably abutted against the lower mounting base (3).

7. The in-mold injection molding apparatus according to claim 1, characterized in that: The inner side of the support column (2) is movably mounted with an upper injection molded plate (6), and the inner side of the upper injection molded plate (6) is provided with a heat dissipation groove.

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