Injection molding machine for injection molding of plug power cord

Abstract

The invention discloses an injection molding machine for injection molding a plug power cord, belonging to the technical field of injection molding. The gas inside the airbag is heated by a heat-conducting wire, so that the inner cavity of the airbag forms an upward airflow with the outside through a connecting through hole and an air inlet through hole, and the hot air continuously overflows to the inner cavity of the mold through the connecting through hole and the air inlet through hole. In the process that the connecting ring is gradually pressed down, the connecting cylinder is pushed, and the second through hole on the connecting cylinder finally coincides with the first through hole on the sleeve, so that the atomized demoulding agent in the inner cavity of the connecting cylinder enters the inner cavity of the airbag, and the atomized demoulding agent in the inner cavity of the airbag enters the inner cavity of the mold in cooperation with the upward airflow, and fully covers the inner cavity of the mold, and then the injection molding operation is performed. In the specific operation process, the demoulding agent can be formed on the inner wall of the mold while the upper mold is covered, and there is no need to spray the demoulding agent on the inner cavity of the mold regularly before injection molding, thereby improving work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and more particularly to an injection molding machine for injection molding a plug power cord. Background Art

[0002] Rubber injection molding: Rubber injection molding is a production method in which the rubber material is directly injected from the barrel into the mold for vulcanization. The advantages of rubber injection molding are: although it is an intermittent operation, the molding cycle is short, the production efficiency is high, the blank preparation process is eliminated, the labor intensity is low, and the product quality is excellent. Plastic injection molding: Plastic injection molding is a method of making plastic products. The molten plastic is injected into the plastic product mold under pressure, and the desired plastic parts are obtained by cooling and molding. There are mechanical injection molding machines specifically used for injection molding. The most commonly used plastic is polystyrene. Molding injection molding: The resulting shape is often the final product, and no other processing is required before installation or use as the final product. Many details, such as bosses, ribs, and threads, can be molded in a one-step injection molding operation.

[0003] In some existing injection molding processes, it is necessary to place the plug power cord that has not yet been molded inside the mold, and then manually perform film closing, calibration and injection molding, and then pick up the mold, open the mold and take out the plug power cord. The operation is cumbersome and it is not convenient to fix the lower mold. Before injection molding, it is necessary to regularly spray a release agent on the inner cavity of the mold, which affects the injection molding efficiency. After the injection molding of the plug power cord is completed, there are bubble holes on the surface of the plastic. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide an injection molding machine for injecting a plug power cord. In this scheme, the lower mold is first embedded into the inside of the fitting groove, the lower mold is limited, and then the injection molding machine is started for preheating. While the injection molding machine is preheating, the heat of its injection head is conducted to the inner cavity of the elastic airbag through the heat conducting wire, and the elastic airbag expands by the heat introduced by the carbon dioxide gas. The expanded elastic airbag will push the connecting block and the card block, so that the card block is embedded in the inside of the card block, and the lower mold is clamped and limited. In the specific operation process, the personnel only need to place the lower mold inside the fitting groove, start the injection molding machine for preheating, and then clamp and limit the lower mold, which can save a lot of time for preparatory work. In the subsequent operation process, it is only necessary to take and cover the upper mold, which is convenient for personnel to operate. In the process of injection molding, after placing the plug power cord on the lower mold, cover the upper mold. While covering the upper mold, the connecting ring will gradually press down, and the gas inside the airbag is heated by the heat conductive wire, so that the inner cavity of the airbag is connected to the outside through the connecting through hole and the air inlet through hole. An upward airflow is formed, and the hot air continuously overflows into the inner cavity of the mold through the connecting through hole and the air inlet through hole. When the connecting ring is gradually pressed down, the connecting tube is pushed, and the second through hole on the connecting tube finally coincides with the first through hole on the sleeve, so that the atomized mold release agent in the inner cavity of the connecting tube enters the inner cavity of the airbag, and the atomized mold release agent in the inner cavity of the airbag enters the inner cavity of the mold with the upward airflow and fully covers the inner cavity of the mold, and then the injection molding operation is carried out. In the specific operation process, while the upper mold is covering, a demolding can be formed on the inner wall of the mold. There is no need to spray the release agent in the inner cavity of the mold regularly before injection molding, which improves work efficiency. When the upper mold is picked up, the connecting cylinder is reset by the second spring, so that the third through hole and the atomized release agent feed pipe coincide with each other, so that the connecting cylinder reserves the atomized release agent and circulates it in sequence. During the injection molding process, the plastic injected into the inner cavity of the mold is cooled and formed at a very fast speed. The excess gas in the inner cavity of the mold enters the inner cavity of the airbag through the air inlet through hole and the connecting through hole, so as to balance the pressure in the inner cavity of the mold and reduce the possibility of air bubbles on the plastic surface.

[0006] Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] The injection molding production process of the plug power cord includes the following steps:

[0009] S1. First, fill the injection molding machine with plastic particles, start the injection molding machine, and preheat the injection molding machine;

[0010] S2, start the injection molding machine, and squeeze out the waste material remaining inside the injection molding machine until a relatively neat plastic colloid is squeezed out;

[0011] S3, placing the plug power cord that has not yet been injected into the mold, closing the mold, aligning the feed hole of the mold with the injection outlet, and starting the injection molding machine for injection molding;

[0012] S4. After the injection molding is completed, the mold is opened to obtain the finished product of the injection-molded plug power cord.

[0013] Among them, an injection molding machine for injection molding a plug power cord comprises an injection molding platform, the upper end of the injection molding platform is fixedly connected to an injection molding mechanism, the lower end of the injection molding mechanism is fixedly connected to an injection molding head, the outer circumferential surface of the injection molding head is fixedly connected to a heat-conducting wire and a protective cover, the heat-conducting wire is located in the inner cavity of the protective cover, the outer circumferential surface of the protective cover is fixedly connected to a pair of hoses, the lower ends of the pair of hoses are fixedly connected to the injection molding platform, the heat-conducting wires extend to the inner cavities of a pair of hoses respectively, the surface of the injection molding platform is provided with a fitting groove, a pair of elastic airbags are fixedly connected inside the fitting groove, the heat-conducting wires penetrate a pair of elastic airbags respectively, the heat-conducting wires and the elastic airbags are fixedly connected, the inner cavity of the elastic airbag is filled with carbon dioxide gas, the end of the elastic airbag away from the inner wall of the fitting groove is fixedly connected to a connecting block, and the connecting block is away from the elastic airbag. The end is fixedly connected with a card block, the lower mold is embedded in the interlocking groove, and a pair of card grooves are cut at the outer end of the lower mold, and the card grooves match the card blocks. In this scheme, the lower mold is first embedded in the interlocking groove, the lower mold is limited, and then the injection molding machine is started for preheating. While the injection molding machine is preheating, the heat of its injection head is conducted to the inner cavity of the elastic airbag through the heat conducting wire, and the elastic airbag expands by the heat introduced by the carbon dioxide gas. The expanded elastic airbag will push the connecting block and the card block, so that the card block is embedded in the interior of the card block, and the lower mold is clamped and limited. In the specific operation process, the personnel only need to place the lower mold in the interlocking groove, start the injection molding machine for preheating, and then the lower mold can be clamped and limited, which can save a lot of time for preparatory work. In the subsequent operation process, it is only necessary to take and cover the upper mold, which is convenient for personnel to operate.

[0014] Furthermore, the upper end of the lower mold is matched with the upper mold, and a pair of through holes are drilled inside the lower mold, and the inner walls of the pair of through holes are fixedly connected with a connecting ring, the upper end of the connecting ring is fixedly connected with a first spring, and the upper end of the first spring is fixedly connected with a pressure rod, the first spring surrounds the outer circumference of the pressure rod, and the lower end of the pressure rod passes through the connecting ring, and a cavity is drilled inside the injection molding platform, and an airbag is fixedly connected inside the cavity, and a pair of sleeves are fixedly connected to the inner bottom end of the cavity, and the upper ends of the pair of sleeves extend to the inner cavity of the airbag, and the sleeve and the airbag are fixedly connected, and the lower end of the pressure rod extends to the inner cavity of the sleeve, and the inner bottom end of the sleeve is fixed A second spring is fixedly connected, and a connecting cylinder is fixedly connected to the upper end of the connecting cylinder. A blocking block is fixedly connected to the upper end of the connecting cylinder. The upper end of the connecting cylinder contacts the lower end of the pressure rod. A pair of atomized demoulding agent feeding pipes are fixedly connected to the inside of the cavity. The atomized demoulding agent feeding pipes are communicated with the sleeve. A first through hole is drilled on the outer circumferential surface of the sleeve. A second through hole and a third through hole are drilled on the outer circumferential surface of the connecting cylinder. The first through hole coincides with the second through hole, and the third through hole coincides with the atomized demoulding agent feeding pipe. A pair of air inlet through holes are drilled inside the lower mold, and a pair of connecting through holes are drilled on the upper end of the airbag. The air inlet through holes and the connecting cylinder are connected The connecting holes are connected. During the injection molding process, after placing the plug power cord on the lower mold, the upper mold is covered. While covering the upper mold, the connecting ring will be gradually pressed down. The gas inside the airbag is heated by the heat-conducting wire, so that the inner cavity of the airbag forms an upward airflow with the outside through the connecting through hole and the air inlet through hole. The hot air continuously overflows into the inner cavity of the mold through the connecting through hole and the air inlet through hole. In the process of the connecting ring being gradually pressed down, it will push the connecting tube, and the second through hole on the connecting tube will eventually coincide with the first through hole on the sleeve, so that the atomized mold release agent in the inner cavity of the connecting tube enters the inner cavity of the airbag, and the atomized mold release agent in the inner cavity of the airbag cooperates with the upward airflow to enter the inner cavity of the mold and fully cover the inner cavity of the airbag. The inner cavity of the mold then undergoes injection molding. In the specific operation process, a release agent can be formed on the inner wall of the mold while the upper mold is covering it. There is no need to spray the release agent on the inner cavity of the mold regularly before injection molding, thereby improving work efficiency. When the upper mold is picked up, the connecting tube is reset by the second spring, so that the third through hole and the atomized release agent feed pipe coincide with each other, so that the connecting tube reserves the atomized release agent and circulates it in sequence. During the injection molding process, the plastic injected into the inner cavity of the mold is rapidly cooled and formed, and excess gas in the inner cavity of the mold enters the inner cavity of the airbag through the air inlet through hole and the connecting through hole, thereby balancing the pressure in the inner cavity of the mold and reducing the possibility of air bubbles on the plastic surface.

[0015] Furthermore, the thermal conductive wire located in the inner cavity of the elastic airbag is in a bent state. The bent thermal conductive wire provides sufficient deformation space for the resetting of the elastic airbag, thereby preventing the elastic airbag from being restricted by the thermal conductive wire during the resetting process and being unable to be relocated. At the same time, the bent thermal conductive wire can conduct more heat to the inner cavity of the elastic airbag, thereby improving the expansion efficiency of the elastic airbag.

[0016] Furthermore, the thermal wire is spirally wound around the outer circumference of the injection head. The thermal wire is made of copper alloy material. The thermal wire is spirally wound around the outer circumference of the injection head, so that the thermal wire can fully absorb the heat emitted by the injection head. The thermal wire made of copper alloy material can improve the heat conduction efficiency.

[0017] Furthermore, a connecting sealing ring is fixedly connected to the upper end of the airbag, and a sliding connection is formed between the connecting sealing ring and the pressure rod. The connecting sealing ring facilitates the pressure rod to slide relative to the airbag, while improving the sealing effect of the airbag.

[0018] Furthermore, an isolation membrane is fixedly connected to the upper end of the air inlet through hole, and the isolation membrane reduces the possibility of plastic entering the air inlet through hole, thereby improving the molding effect of the plastic.

[0019] Furthermore, a connecting bucket is fixedly connected to the lower end of the connecting through hole, and the lower end of the connecting bucket is located above the first through hole. The connecting bucket guides the rising airflow to improve the flow efficiency of the atomized release agent into the mold cavity.

[0020] Furthermore, the protective cover is made of ceramic material, and the outer circumferential surface of the hose is provided with a thermal insulation coating. The protective cover made of ceramic material is used to insulate the injection head and reduce safety hazards. When combined with the hose provided with a thermal insulation coating, the heat transfer effect is improved while further reducing safety hazards.

[0021] Furthermore, a pair of rubber layers are fixedly connected to the outer ends of the upper mold, and the surfaces of the rubber layers are provided with anti-slip grooves. The rubber layers facilitate the picking up of the upper mold, thereby reducing the possibility of the upper mold slipping from the hands and breaking. Beneficial Effects

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] (1) This solution first embeds the lower mold into the inside of the fitting groove, limits the lower mold, and then starts the injection molding machine for preheating. While the injection molding machine is preheating, the heat of its injection head is transmitted to the inner cavity of the elastic airbag through the heat conducting wire. The elastic airbag expands with the heat introduced by the carbon dioxide gas. The expanded elastic airbag will push the connecting block and the card block, so that the card block is embedded in the inside of the card block, clamping and limiting the lower mold. In the specific operation process, the personnel only need to place the lower mold in the fitting groove and start the injection molding machine for preheating, and then the lower mold can be clamped and limited. It can save a lot of time for preparatory work. In the subsequent operation process, it is only necessary to take and cover the upper mold, which is convenient for personnel to operate.

[0024] (2) The upper end of the lower mold is matched with the upper mold, and a pair of through holes are drilled inside the lower mold. The inner walls of the pair of through holes are fixedly connected to a connecting ring. The upper end of the connecting ring is fixedly connected to a first spring. The upper end of the first spring is fixedly connected to a pressure rod. The first spring surrounds the outer circumference of the pressure rod. The lower end of the pressure rod passes through the connecting ring. A cavity is drilled inside the injection molding platform. An airbag is fixedly connected inside the cavity. A pair of sleeves are fixedly connected to the inner bottom end of the cavity. The upper ends of the pair of sleeves extend to the inner cavity of the airbag. The sleeves and the airbag are fixedly connected. The lower end of the pressure rod extends to the inner cavity of the sleeve. The inner bottom end of the sleeve is fixedly connected to a second spring. The upper end of the second spring is fixedly connected to the inner cavity of the sleeve. A connecting cylinder is fixedly connected, and a blocking block is fixedly connected to the upper end of the connecting cylinder. The upper end of the connecting cylinder contacts the lower end of the pressure rod. A pair of atomized demoulding agent feeding pipes are fixedly connected to the inside of the cavity. The atomized demoulding agent feeding pipe is connected to the sleeve. A first through hole is drilled on the outer circumference of the sleeve. A second through hole and a third through hole are drilled on the outer circumference of the connecting cylinder. The first through hole coincides with the second through hole, and the third through hole coincides with the atomized demoulding agent feeding pipe. A pair of air inlet through holes are drilled inside the lower mold, and a pair of connecting through holes are drilled on the upper end of the airbag. The air inlet through holes are connected to the connecting through holes. During the injection molding process, the plug power cord is placed After the lower mold is closed, the upper mold is covered. While the upper mold is closed, the connecting ring will be gradually pressed down. The gas inside the airbag is heated by the heat-conducting wire, so that the inner cavity of the airbag forms an upward airflow with the outside through the connecting through hole and the air inlet through hole. The hot air continuously overflows into the inner cavity of the mold through the connecting through hole and the air inlet through hole. In the process of the connecting ring being gradually pressed down, it will push the connecting tube. The second through hole on the connecting tube will eventually coincide with the first through hole on the sleeve, so that the atomized mold release agent in the inner cavity of the connecting tube enters the inner cavity of the airbag. The atomized mold release agent in the inner cavity of the airbag cooperates with the upward airflow to enter the inner cavity of the mold and fully covers the inner cavity of the mold, and then the injection molding operation is carried out. In the specific operation process, while the upper mold is covering, a mold release agent can be formed on the inner wall of the mold. There is no need to spray the mold release agent in the inner cavity of the mold regularly before injection molding, which improves work efficiency. When the upper mold is picked up, the connecting cylinder is reset by the second spring, so that the third through hole and the atomized mold release agent feed pipe coincide with each other, so that the connecting cylinder reserves the atomized mold release agent and circulates it in sequence. During the injection molding process, the plastic injected into the mold cavity is cooled and formed at a very fast speed. The excess gas in the mold cavity enters the inner cavity of the airbag through the air inlet through hole and the connecting through hole, balancing the pressure in the mold cavity and reducing the possibility of air bubbles on the plastic surface.

[0025] (3) The thermal conductive wire located in the inner cavity of the elastic airbag is in a bent state. The bent thermal conductive wire provides sufficient deformation space for the elastic airbag to be reset, thereby preventing the elastic airbag from being restricted by the thermal conductive wire during the reset process and being unable to be reset. At the same time, the bent thermal conductive wire can conduct more heat to the inner cavity of the elastic airbag, thereby improving the expansion efficiency of the elastic airbag.

[0026] (4) The thermal wire is spirally wound around the outer circumference of the injection head. The thermal wire is made of copper alloy material. The thermal wire is spirally wound around the outer circumference of the injection head so that the thermal wire can fully absorb the heat emitted by the injection head. The thermal wire made of copper alloy material can improve the heat conduction efficiency.

[0027] (5) A connecting sealing ring is fixedly connected to the upper end of the airbag, and a sliding connection is formed between the connecting sealing ring and the pressure rod. The connecting sealing ring facilitates the pressure rod to slide relative to the airbag, while improving the sealing effect of the airbag.

[0028] (6) An isolation membrane is fixedly connected to the upper end of the air inlet hole. The isolation membrane reduces the possibility of plastic entering the air inlet hole, thereby improving the molding effect of the plastic.

[0029] (7) A connecting bucket is fixedly connected to the lower end of the connecting through hole. The lower end of the connecting bucket is located above the first through hole. The connecting bucket guides the rising airflow to improve the flow efficiency of the atomized release agent into the mold cavity.

[0030] (8) The protective cover is made of ceramic material, and the outer circumference of the hose is provided with a thermal insulation coating. The protective cover made of ceramic material can insulate the injection head and reduce safety hazards. In combination with the hose provided with a thermal insulation coating, the heat transfer effect can be improved while further reducing safety hazards.

[0031] (9) A pair of rubber layers are fixedly connected to the outer end of the upper mold. The surface of the rubber layer is provided with anti-slip grooves. The rubber layer makes it easier to pick up the upper mold, reducing the possibility of the upper mold slipping from the hand and breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a partial cross-sectional structural schematic diagram of the mold of the present invention;

[0034] Figure 3 It is a partial cross-sectional structural schematic diagram of the upper mold in the picking state of the present invention;

[0035] Figure 4 for Figure 3 A magnified image of point A;

[0036] Figure 5 It is a schematic cross-sectional structure diagram of the injection molding head of the present invention;

[0037] Figure 6 It is a schematic diagram of the cross-sectional structure of the sleeve of the present invention.

[0038] Description of the numbers in the figure:

[0039] 1 injection molding platform, 2 injection molding mechanism, 3 injection molding head, 4 heat conducting wire, 5 protective cover, 6 hose, 7 fitting groove, 8 elastic airbag, 9 carbon dioxide gas, 10 connecting block, 11 clamping block, 12 lower mold, 13 clamping groove, 14 upper mold, 1401 rubber layer, 15 through hole, 16 connecting ring, 17 first spring, 18 pressure rod, 19 cavity, 20 airbag, 2001 connecting sealing ring, 21 sleeve, 22 second spring, 23 connecting cylinder, 24 blocking block, 25 atomizing release agent feeding pipe, 26 first through hole, 27 second through hole, 28 third through hole, 29 air intake through hole, 2901 isolation membrane, 30 connecting through hole, 3001 connecting bucket. DETAILED DESCRIPTION

[0040] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0043] The injection molding production process of the plug power cord includes the following steps:

[0044] S1. First, fill the injection molding machine with plastic particles, start the injection molding machine, and preheat the injection molding machine;

[0045] S2, start the injection molding machine, and squeeze out the waste material remaining inside the injection molding machine until a relatively neat plastic colloid is squeezed out;

[0046] S3, placing the plug power cord that has not yet been injected into the mold, closing the mold, aligning the feed hole of the mold with the injection outlet, and starting the injection molding machine for injection molding;

[0047] S4. After the injection molding is completed, the mold is opened to obtain the finished product of the injection-molded plug power cord.

[0048] See also Figure 1-6An injection molding machine for injection molding a plug power cord includes an injection molding platform 1, an injection molding mechanism 2 is fixedly connected to the upper end of the injection molding platform 1, an injection molding head 3 is fixedly connected to the lower end of the injection molding mechanism 2, a heat-conducting wire 4 and a protective cover 5 are fixedly connected to the outer circumference of the injection molding head 3, the heat-conducting wire 4 is located in the inner cavity of the protective cover 5, a pair of hoses 6 are fixedly connected to the outer circumference of the protective cover 5, the lower ends of the pair of hoses 6 are fixedly connected to the injection molding platform 1, the heat-conducting wire 4 extends to the inner cavity of the pair of hoses 6 respectively, an embedding groove 7 is cut on the surface of the injection molding platform 1, a pair of elastic airbags 8 are fixedly connected inside the embedding groove 7, the heat-conducting wire 4 passes through the pair of elastic airbags 8 respectively, the heat-conducting wire 4 and the elastic airbag 8 are fixedly connected, and the inner cavity of the elastic airbag 8 is filled with carbon dioxide gas 9 , one end of the elastic airbag 8 away from the inner wall of the fitting groove 7 is fixedly connected with a connecting block 10, and one end of the connecting block 10 away from the elastic airbag 8 is fixedly connected with a clamping block 11. A lower mold 12 is embedded in the interior of the fitting groove 7, and a pair of clamping grooves 13 are cut at the outer end of the lower mold 12. The clamping groove 13 matches the clamping block 11. In this scheme, the lower mold 12 is first embedded into the interior of the fitting groove 7, the lower mold 12 is limited, and then the injection molding machine is started for preheating. While the injection molding machine is preheated, the heat of its injection head 3 is conducted to the inner cavity of the elastic airbag 8 through the heat conducting wire 4, and the elastic airbag 8 expands through the heat introduced by the carbon dioxide gas 9, and the expanded elastic airbag 8 will push the connecting block 10 and the clamping block 11, so that the clamping block 11 is embedded in the interior of the clamping block 11 , clamp and limit the lower mold 12. In the specific operation process, the personnel only need to place the lower mold 12 inside the fitting groove 7 and start the injection molding machine for preheating, and then clamp and limit the lower mold 12, which can save a lot of time for preparatory work. In the subsequent operation process, it is only necessary to take and cover the upper mold 14, which is convenient for personnel to operate. The upper end of the lower mold 12 is matched with the upper mold 14, and a pair of through holes 15 are drilled inside the lower mold 12. The inner walls of the pair of through holes 15 are fixedly connected with a connecting ring 16, and the upper end of the connecting ring 16 is fixedly connected with a first spring 17, and the upper end of the first spring 17 is fixedly connected with a pressure rod 18, which surrounds the outer circumferential surface of the pressure rod 18, and the lower end of the pressure rod 18 passes through the connecting ring 16. A cavity 19 is excavated inside, and an airbag 20 is fixedly connected inside the cavity 19. A pair of sleeves 21 are fixedly connected to the inner bottom end of the cavity 19. The upper ends of the pair of sleeves 21 extend to the inner cavity of the airbag 20, and the sleeves 21 and the airbag 20 are fixedly connected. The lower end of the pressure rod 18 extends to the inner cavity of the sleeve 21. A second spring 22 is fixedly connected to the inner bottom end of the sleeve 21. A connecting tube 23 is fixedly connected to the upper end of the second spring 22. A blocking block 24 is fixedly connected to the upper end of the connecting tube 23. The upper end of the connecting tube 23 contacts the lower end of the pressure rod 18. A pair of atomized release agent feed pipes 25 are fixedly connected inside the cavity 19. The atomized release agent feed pipes 25 are connected to the sleeve 21. A first through hole 26 is excavated on the outer circumferential surface of the sleeve 21.The outer circumferential surface of the connecting cylinder 23 is formed with a second through hole 27 and a third through hole 28, the first through hole 26 coincides with the second through hole 27, the third through hole 28 coincides with the atomized release agent feed pipe 25, a pair of air inlet through holes 29 are formed inside the lower mold 12, and a pair of connecting through holes 30 are formed at the upper end of the airbag 20, the air inlet through holes 29 are connected with the connecting through holes 30, during the injection molding process, after placing the plug power cord on the lower mold, the upper mold 14 is covered, and while the upper mold 14 is covered, the connecting ring 16 will gradually When the airbag 20 is pressed down, the gas inside the airbag 20 is heated by the heat-conducting wire 4, so that the inner cavity of the airbag 20 forms an upward airflow with the outside through the connecting through hole 30 and the air inlet through hole 29, and the hot air continuously overflows into the inner cavity of the mold through the connecting through hole 30 and the air inlet through hole 29. When the connecting ring 16 is gradually pressed down, it will push the connecting tube 23, and the second through hole 27 on the connecting tube 23 will eventually coincide with the first through hole 26 on the sleeve 21, so that the atomized demoulding agent in the inner cavity of the connecting tube 23 enters the inner cavity of the airbag 20, and the airbag 20 is The atomized mold release agent in the cavity cooperates with the upward air flow to enter the inner cavity of the mold and fully covers the inner cavity of the mold, and then the injection molding operation is carried out. In the specific operation process, the mold release agent can be formed on the inner wall of the mold while the upper mold 14 is covered. There is no need to spray the mold release agent in the inner cavity of the mold regularly before injection molding, which improves the work efficiency. When the upper mold 14 is picked up, the connecting cylinder 23 is reset by the second spring 22, so that the third through hole 28 and the atomized mold release agent feeding pipe 25 are matched, so that the connecting cylinder 23 can store the atomized mold release agent. The upper mold 14 is provided with a pair of rubber layers 1401 fixedly connected to the outer end of the upper mold 14. The surface of the rubber layer 1401 is provided with anti-skid patterns. The rubber layer 1401 is used to facilitate the upper mold 14 to be picked up, and the possibility of the upper mold 14 slipping out of the hand and breaking is reduced.

[0049] See also Figure 4 The thermal conductive wire 4 located in the inner cavity of the elastic airbag 8 is in a bent state. The bent thermal conductive wire 4 provides sufficient deformation space for the resetting of the elastic airbag 8, thereby preventing the elastic airbag 8 from being restricted by the thermal conductive wire 4 during the resetting process and being unable to be relocated. At the same time, the bent thermal conductive wire 4 can conduct more heat to the inner cavity of the elastic airbag 8, thereby improving the expansion efficiency of the elastic airbag 8.

[0050] See also Figure 5The heat-conducting wire 4 is spirally wound around the outer circumference of the injection head 3. The heat-conducting wire 4 is made of copper alloy material. The heat-conducting wire 4 is spirally wound around the outer circumference of the injection head 3, so that the heat-conducting wire 4 can fully absorb the heat emitted by the injection head 3. The heat-conducting wire 4 made of copper alloy material is used to improve the heat conduction efficiency. The protective cover 5 is made of ceramic material. The outer circumference of the hose 6 is provided with a thermal insulation coating. The protective cover 5 made of ceramic material is used to insulate the injection head 3 to reduce safety hazards. The hose 6 with a thermal insulation coating is used to improve the heat transfer effect and further reduce safety hazards.

[0051] See also Figure 2-4 The upper end of the airbag 20 is fixedly connected with a connecting sealing ring 2001, and a sliding connection is formed between the connecting sealing ring 2001 and the pressure rod 18. The connecting sealing ring 2001 facilitates the pressure rod 18 to slide relative to the airbag 20 while improving the sealing effect of the airbag 20. The upper end of the air inlet hole 29 is fixedly connected with an isolation membrane 2901. The isolation membrane 2901 reduces the possibility of plastic entering the air inlet hole 29 and improves the molding effect of the plastic. The lower end of the connecting through hole 30 is fixedly connected with a connecting bucket 3001. The lower end of the connecting bucket 3001 is located above the first through hole 26. The rising airflow is guided by the connecting bucket 3001 to improve the circulation efficiency of the atomized release agent entering the mold cavity.

[0052] Working principle: First, the lower mold 12 is embedded into the inside of the fitting groove 7, the lower mold 12 is limited, and then the injection molding machine is started for preheating. While the injection molding machine is preheating, the heat of the injection head 3 is transferred to the inner cavity of the elastic airbag 8 through the heat conducting wire 4, and the elastic airbag 8 expands with the heat introduced by the carbon dioxide gas 9. The expanded elastic airbag 8 will push the connecting block 10 and the clamping block 11, so that the clamping block 11 is embedded in the inside of the clamping block 11, and the lower mold 12 is clamped and limited. In the specific operation process, the personnel only need to place the lower mold 12 in the fitting groove 7 The inside of the airbag 20 is started, and the injection molding machine is started for preheating, and the lower mold 12 can be clamped and limited, which can save a lot of time for preparatory work. In the subsequent operation process, it is only necessary to take and cover the upper mold 14, which is convenient for personnel operation. During the injection molding process, after placing the plug power cord on the lower mold, the upper mold 14 is covered. While covering the upper mold 14, the connecting ring 16 will gradually press down, and the gas inside the airbag 20 is heated by the heat conductive wire 4, so that the inner cavity of the airbag 20 forms an upward airflow with the outside world through the connecting through hole 30 and the air inlet through hole 29, and the hot air continuously passes through The connecting through hole 30 and the air inlet through hole 29 overflow into the inner cavity of the mold. When the connecting ring 16 is gradually pressed down, the connecting cylinder 23 is pushed. The second through hole 27 on the connecting cylinder 23 finally coincides with the first through hole 26 on the sleeve 21, so that the atomized mold release agent in the inner cavity of the connecting cylinder 23 enters the inner cavity of the airbag 20. The atomized mold release agent in the inner cavity of the airbag 20 cooperates with the upward airflow to enter the inner cavity of the mold and fully covers the inner cavity of the mold, and then the injection molding operation is carried out. In the specific operation process, the mold release agent can be formed on the inner wall of the mold while the upper mold 14 is covered, and there is no need to Before injection molding, the mold cavity is regularly sprayed with a release agent to improve work efficiency. When the upper mold 14 is picked up, the connecting cylinder 23 is reset by the second spring 22, so that the third through hole 28 coincides with the atomized release agent feed pipe 25, so that the connecting cylinder 23 reserves the atomized release agent and circulates it in sequence. During the injection molding process, the plastic injected into the mold cavity is rapidly cooled and formed, and the excess gas in the mold cavity enters the inner cavity of the airbag 20 through the air inlet through hole 29 and the connecting through hole 30, so as to balance the pressure in the mold cavity and reduce the possibility of air bubbles on the plastic surface.

[0053] The above is only a preferred specific implementation manner of the present invention; but the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered by the protection scope of the present invention.

Claims

1. An injection molding machine for injection molding of a plug power cord, characterized in that: The injection molding machine comprises an injection molding platform (1), the upper end of the injection molding platform (1) is fixedly connected to an injection molding mechanism (2), the lower end of the injection molding mechanism (2) is fixedly connected to an injection molding head (3), the outer circumferential surface of the injection molding head (3) is fixedly connected to a heat-conducting wire (4) and a protective cover (5), the heat-conducting wire (4) is located in the inner cavity of the protective cover (5), the outer circumferential surface of the protective cover (5) is fixedly connected to a pair of hoses (6), the lower ends of the pair of hoses (6) are fixedly connected to the injection molding platform (1), the heat-conducting wire (4) respectively extends to the inner cavity of the pair of hoses (6), and the surface of the injection molding platform (1) is provided with an embedding groove (7), the embedding groove ( A pair of elastic airbags (8) are fixedly connected inside the engaging groove (7), the heat conductive wires (4) respectively penetrate the pair of elastic airbags (8), the heat conductive wires (4) and the elastic airbags (8) are fixedly connected, the inner cavity of the elastic airbags (8) is filled with carbon dioxide gas (9), the end of the elastic airbags (8) away from the inner wall of the engaging groove (7) is fixedly connected to a connecting block (10), the end of the connecting block (10) away from the elastic airbags (8) is fixedly connected to a clamping block (11), the lower mold (12) is embedded inside the engaging groove (7), and the outer end of the lower mold (12) is cut with a pair of clamping grooves (13), and the clamping grooves (13) match the clamping blocks (11); The upper end of the lower die (12) is matched with the upper die (14), the interior of the lower die (12) is provided with a pair of through holes (15), the inner walls of the pair of through holes (15) are fixedly connected with a connecting ring (16), the upper end of the connecting ring (16) is fixedly connected with a first spring (17), the upper end of the first spring (17) is fixedly connected with a pressure rod (18), the first spring (17) surrounds the outer circumferential surface of the pressure rod (18), the lower end of the pressure rod (18) passes through the connecting ring (16), and the connecting ring (16) is fixedly connected with the first spring (17). ), a cavity (19) is excavated inside the injection molding platform (1), an airbag (20) is fixedly connected inside the cavity (19), a pair of sleeves (21) are fixedly connected to the inner bottom end of the cavity (19), the upper ends of the pair of sleeves (21) extend to the inner cavity of the airbag (20), the sleeves (21) and the airbag (20) are fixedly connected, the lower end of the pressure rod (18) extends to the inner cavity of the sleeve (21), and the inner bottom end of the sleeve (21) is fixedly connected to a second The second spring (22) is fixedly connected to a connecting tube (23) at its upper end, a blocking block (24) is fixedly connected to the connecting tube (23), the upper end of the connecting tube (23) is in contact with the lower end of the pressure rod (18), a pair of atomized mold release agent feed pipes (25) are fixedly connected to the inside of the cavity (19), the atomized mold release agent feed pipes (25) are connected to the sleeve (21), and the outer circumferential surface of the sleeve (21) is drilled with a first through hole (26) ), a second through hole (27) and a third through hole (28) are bored on the outer circumferential surface of the connecting tube (23), the first through hole (26) coincides with the second through hole (27), the third through hole (28) coincides with the atomized release agent feed pipe (25), a pair of air inlet through holes (29) are bored inside the lower mold (12), a pair of connecting through holes (30) are bored at the upper end of the air bag (20), and the air inlet through holes (29) are connected to the connecting through holes (30).

2. The injection molding machine for molding the plug power cord according to claim 1, characterized in that: The heat-conducting wire (4) located in the inner cavity of the elastic airbag (8) is in a bent state.

3. The injection molding machine for molding the plug power cord according to claim 2, characterized in that: The heat-conducting wire (4) is wound in a spiral shape on the outer circumferential surface of the injection head (3), and the heat-conducting wire (4) is made of a copper alloy material.

4. The injection molding machine for molding the plug power cord according to claim 3, characterized in that: A connecting sealing ring (2001) is fixedly connected to the upper end of the airbag (20), and a sliding connection is formed between the connecting sealing ring (2001) and the pressure rod (18).

5. The injection molding machine for molding the plug power cord according to claim 3, characterized in that: An isolation membrane (2901) is fixedly connected to the upper end of the air inlet through hole (29).

6. The injection molding machine for molding the plug power cord according to claim 5, characterized in that: The lower end of the connecting through hole (30) is fixedly connected to a connecting bucket (3001), and the lower end of the connecting bucket (3001) is located above the first through hole (26).

7. The injection molding machine for molding a plug power cord according to claim 2, characterized in that: The protective cover (5) is made of ceramic material, and the outer circumferential surface of the hose (6) is provided with a heat insulation coating.

8. The injection molding machine for molding a plug power cord according to claim 3, characterized in that: A pair of rubber layers (1401) are fixedly connected to the outer ends of the upper mold (14), and the surfaces of the rubber layers (1401) are provided with anti-slip grooves.

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