A rubber injection molding machine with heat preservation and heating function

Abstract

This utility model relates to the field of rubber injection molding technology, specifically a rubber injection molding machine with heat preservation and heating functions. It includes a rubber injection molding machine body, a base mounted on the bottom of the machine body, and a mold closing mechanism at the molding end of the machine body. By integrating independent heating and cooling pipes inside the moving mold and connecting them to an external heating component (hot oil system) and a chiller, respectively, the mold is preheated and then cooled. Through mechanical linkage between the piston push rod of the heating component and the moving plate of the mold closing mechanism, during mold closing, the movement of the moving plate automatically pushes the preheated heat-conducting oil from the oil tank into the heating pipes of the mold. This provides uniform and efficient preheating and heat preservation of the cavity after mold closing before injection, significantly improving the fluidity and filling effect of the rubber compound, and enhancing the product molding quality and consistency.

Description

Technical Field

[0001] This utility model relates to the field of rubber injection molding technology, specifically to a rubber injection molding machine with heat preservation and heating function. Background Technology

[0002] Rubber injection molding is a process in which rubber compound is heated and plasticized, then injected into a closed mold for vulcanization and molding. In existing technologies, rubber injection molding machines typically only have a cooling system for the mold to cool it down after injection, thereby accelerating the vulcanization and setting of the rubber parts.

[0003] However, in actual production, the mold temperature may drop due to changes in ambient temperature or production intervals. When the next injection begins, the lower temperature mold will quickly absorb the heat of the rubber compound, resulting in poor rubber flowability. This may cause defects such as incomplete mold filling, obvious weld lines, and poor surface finish of the product, affecting the molding quality and consistency of the product. Therefore, a rubber injection molding machine with heat preservation and heating function is proposed. Utility Model Content

[0004] To address the problems in the existing technology, this utility model provides a rubber injection molding machine with heat preservation and heating functions.

[0005] The technical solution adopted by this utility model to solve its technical problem is a rubber injection molding machine with heat preservation and heating function, including a rubber injection molding machine body, an equipment base installed at the bottom of the rubber injection molding machine body, a mold closing mechanism provided at the molding end of the rubber injection molding machine body, and a heating component for heat preservation and heating of the mold closing mechanism provided at one end of the equipment base. The mold closing mechanism includes a fixed mold and a moving mold. The fixed mold is installed and fixed to the injection discharge end of the rubber injection molding machine body by bolts. A moving plate and a fixed plate are arranged in sequence on the side of the moving mold away from the fixed mold. A guide rod is installed between the corner of the fixed plate and the main frame of the rubber injection molding machine body by bolts. The corner of the moving plate is sleeved on the guide rod. The back of the moving mold is installed and fixed to the moving plate by bolts.

[0006] Specifically, the heating assembly includes a heat insulation cover, an oil storage tank is disposed inside the heat insulation cover, and heat insulation cotton is filled between the oil storage tank and the heat insulation cover. A piston rod is inserted into one end of the oil storage tank, and the end of the piston rod away from the oil storage tank extends through the heat insulation cover and is connected to a connecting arm by bolts.

[0007] Specifically, the top surface of the equipment base at one end of the moving plate is provided with a moving groove for the connecting arm to move, and the top of the connecting arm is fixed to the moving plate by bolts; An internal threaded sleeve is fixedly connected to the side of the moving plate away from the moving mold. One end of the internal threaded sleeve is threadedly connected to a threaded rod. One end of the threaded rod is rotatably connected to the fixed plate through a bearing, and the shaft end of the threaded rod protrudes from the fixed plate and is mounted with an upper belt gear through a key pin. The bottom of the upper belt gear is connected to a lower belt gear through an internal toothed belt. A servo reduction motor is bolted to the side of the fixed plate away from the lower belt gear. The drive end of the servo reduction motor is fixed to the shaft of the lower belt gear through a key pin. The servo reduction motor drives the lower belt gear to rotate, which in turn drives the upper belt gear to rotate, causing the threaded rod to rotate in the internal threaded sleeve. This causes the internal threaded sleeve to receive threaded thrust or tension, thereby causing the moving plate to drive the moving mold to complete the opening and closing of the fixed mold. After the rubber injection molding machine body completes the injection of the fixed mold and the moving mold, the mold opening action can be performed, allowing personnel to remove the workpiece between the fixed mold and the moving mold.

[0008] Specifically, the moving mold contains heating pipes for supplying hot oil and cooling pipes for supplying cold water. The heating pipes and cooling pipes are arranged in a serpentine pattern and are made of copper or stainless steel.

[0009] Specifically, an electric heater is installed at the end of the oil storage tank furthest from the connecting arm. An oil drain pipe and a back pressure pipe are connected to both ends of the oil storage tank, respectively. The tops of the oil drain pipe and the back pressure pipe are connected to the two ends of a heating pipe. During the mold closing process between the moving mold and the fixed mold, the moving plate drives the connecting arm to move synchronously, causing the piston pusher to push the hot oil heated by the electric heater in the oil storage tank to the oil drain pipe and into the heating pipe. This provides preheating and insulation for the mold before the next injection, helping to improve the fluidity of the rubber material injected into the mold and enhancing the molding quality.

[0010] Specifically, a chiller is installed on one side of the equipment base, and the drain and return ends of the chiller are connected to both ends of the cooling pipe. After the rubber injection molding machine body completes the injection action, the chiller supplies cold water to the cooling pipe to quickly cool the moving mold, promote workpiece molding, and the supply of cold water is turned off before the next mold closing.

[0011] The beneficial effects of this utility model are: The present invention discloses a rubber injection molding machine with heat preservation and heating function. By integrating independent heating and cooling pipelines inside the moving mold and connecting them to external heating components (hot oil system) and chiller respectively, it realizes the "preheating and heat preservation before cooling" of the mold.

[0012] The present invention discloses a rubber injection molding machine with heat preservation and heating function. By mechanically linking the piston push rod of the heating component with the moving plate of the mold closing mechanism, during the mold closing process, the movement of the moving plate automatically pushes the heat transfer oil preheated by the electric heater in the oil storage tank into the heating pipe of the mold. This allows for uniform and efficient preheating and heat preservation of the cavity after mold closing before injection, significantly improving the fluidity and mold filling effect of the rubber material, and enhancing the molding quality and consistency of the product.

[0013] The present invention describes a rubber injection molding machine with heat preservation and heating function, which drives the hot oil circulation through the mechanical energy of the mold closing action, eliminating the need for additional pumping power and thus saving energy and protecting the environment. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a schematic diagram of the threaded rod of this utility model; Figure 3 This is a schematic diagram of the heating component of this utility model; Figure 4 This is a schematic diagram of the oil storage tank of this utility model; Figure 5 This is a schematic diagram of the piston push rod of this utility model; Figure 6 This is a schematic diagram of the electric heater of this utility model; Figure 7 This is a schematic diagram of the heating tube and cooling tube of this utility model; In the diagram: 1. Rubber injection molding machine body; 2. Mold closing mechanism; 21. Fixed mold; 22. Moving mold; 221. Heating pipe; 222. Cooling pipe; 23. Moving plate; 24. Fixed plate; 25. Guide rod; 26. Internal threaded sleeve; 27. Threaded rod; 28. Servo geared motor; 29. ​​Lower belt gear; 211. Upper belt gear; 3. Equipment base; 31. Moving slot; 4. Chiller; 5. Heating component; 51. Oil storage tank; 52. Piston push rod; 53. Connecting arm; 54. Electric heater; 55. Insulation cover; 56. Oil drain pipe; 57. Back pressure pipe. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] like Figure 1-7As shown, the present invention discloses a rubber injection molding machine with heat preservation and heating function, comprising a rubber injection molding machine body 1, with an equipment base 3 fixed at its bottom. A mold closing mechanism 2 is provided at the molding end. A heating component 5 is installed inside the equipment base 3.

[0018] The mold clamping mechanism 2 includes a fixed mold 21 and a moving mold 22. The fixed mold 21 is fixed to the injection discharge end by bolts. The moving mold 22 is connected to a moving plate 23 and a fixed plate 24 in sequence on its right side. The two ends of four guide rods 25 are fixed to the fixed plate 24 and the frame of the rubber injection molding machine body 1, respectively. The moving plate 23 is slidably sleeved on the guide rods 25. The moving mold 22 is fixed to the moving plate 23 by bolts.

[0019] The heating assembly 5 includes a heat-insulating cover 55 filled with insulating cotton, inside which is an oil storage tank 51. The oil storage tank 51 contains heat-conducting oil and is equipped with an electric heater 54. A piston rod 52 is inserted into the oil storage tank 51, with its right end extending out of the heat-insulating cover 55 and connecting to the lower end of the connecting arm 53. The top surface of the equipment base 3 has a moving groove 31, through which the upper end of the connecting arm 53 passes and is fixed to the bottom of the moving plate 23.

[0020] The length of piston rod 52 is less than the length of oil tank 51.

[0021] The moving mold 22 has two independent serpentine channels inside, which are respectively embedded with heating tube 221 and cooling tube 222. The two are staggered to control the temperature evenly. The material is copper tube.

[0022] The oil storage tank 51 is connected to an oil drain pipe 56 and a back pressure pipe 57 at both ends. The top ends of the oil drain pipe 56 and the back pressure pipe 57 are connected to the inlet and outlet of the heating pipe 221, respectively, forming a closed loop.

[0023] An internally threaded sleeve 26 is fixedly installed on the right side of the moving plate 23. A threaded rod 27 is threadedly inserted into the internal thread of the sleeve 26. The end of the threaded rod 27 away from the internally threaded sleeve 26 is mounted on the fixed plate 24 via a bearing. The shaft of the threaded rod 27 passes through the fixed plate 24 and is keyed to the upper belt gear 211. A servo reduction motor 28 mounted on the fixed plate 24 drives the lower belt gear 29, which in turn drives the upper belt gear 211 via a belt, thereby causing the threaded rod 27 to rotate and realizing the opening and closing motion of the moving plate 23 and the moving mold 22.

[0024] A chiller 4 is placed next to the equipment base 3, and its inlet and outlet water pipes are connected to the two ends of the cooling pipe 222 inside the moving mold 22.

[0025] When the mold is closed, the servo geared motor 28 drives the threaded rod 27 to rotate, pushing the moving plate 23 and the moving mold 22 to the left. The connecting arm 53 then moves to the left, pushing the piston rod 52 to force the heat-conducting oil, heated by the electric heater 54 in the oil tank 51, into the heating pipe 221 of the moving mold 22 through the oil drain pipe 56. The hot oil flows through the heating pipe 221 to preheat and maintain the temperature of the moving mold 22. Air in the heating pipe 221 is temporarily discharged into the end of the oil tank 51 away from the hot oil through the return pressure pipe 57. This process is completed at the end of mold closing, providing a suitable temperature cavity for the rubber material to be injected. When the mold opens, the moving plate 23 moves to the right, pulling the piston rod 52 to the right via the connecting arm 53. A negative pressure is generated in the oil tank 51, drawing back some of the heat-conducting oil from the heating pipe 221 and the pipeline. This utilizes the mold closing action to naturally drive the hot oil circulation, cleverly saving energy.

[0026] After the rubber material is injected, the electric heater 54 stops working, the chiller 4 starts, and the chilled water is pumped into the cooling pipe 222 to quickly cool the moving mold 22 and the product, promoting vulcanization and setting.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rubber injection molding machine with heat preservation and heating function, characterized in that, The machine includes a rubber injection molding machine body (1), a machine base (3) is installed at the bottom of the rubber injection molding machine body (1), a mold closing mechanism (2) is provided at the molding end of the rubber injection molding machine body (1), and a heating component (5) for heat preservation and heating of the mold closing mechanism (2) is provided at one end of the machine base (3). The mold closing mechanism (2) includes a fixed mold (21) and a moving mold (22). The fixed mold (21) is fixed to the main frame of the rubber injection molding machine body (1) by bolts. The moving mold (22) is provided with a moving plate (23) and a fixed plate (24) on the side away from the fixed mold (21). A guide rod (25) is installed between the corner of the fixed plate (24) and the main frame of the rubber injection molding machine body (1) by bolts. The corner of the moving plate (23) is sleeved on the guide rod (25). The back of the moving mold (22) is fixed to the moving plate (23) by bolts.

2. A rubber injection molding machine with heat preservation and heating function according to claim 1, characterized in that, The heating component (5) includes a heat insulation cover (55), an oil storage tank (51) is provided inside the heat insulation cover (55), and heat insulation cotton is filled between the oil storage tank (51) and the heat insulation cover (55). A piston push rod (52) is inserted into one end of the oil storage tank (51), and the end of the piston push rod (52) away from the oil storage tank (51) passes through the heat insulation cover (55) and is connected to a connecting arm (53) by bolts.

3. A rubber injection molding machine with heat preservation and heating function according to claim 2, characterized in that, The top surface of the equipment base (3) located at one end of the moving plate (23) is provided with a moving groove (31) for the connecting arm (53) to move. The top of the connecting arm (53) is fixed to the moving plate (23) by bolts. The moving plate (23) is fixedly connected to an internal threaded sleeve (26) on the side away from the moving mold (22). One end of the internal threaded sleeve (26) is threadedly connected to a threaded rod (27). One end of the threaded rod (27) is rotatably connected to the fixed plate (24) through a bearing. The shaft of the threaded rod (27) extends out of the fixed plate (24) and is mounted with an upper belt gear (211) through a key pin. The bottom of the upper belt gear (211) is connected to a lower belt gear (29) through an internal toothed belt. The fixed plate (24) is mounted with a servo gear reducer motor (28) on the side away from the lower belt gear (29) through bolts. The drive end of the servo gear reducer motor (28) is fixed to the shaft of the lower belt gear (29) through a key pin.

4. A rubber injection molding machine with heat preservation and heating function according to claim 3, characterized in that, The moving mold (22) contains a heating pipe (221) for supplying hot oil and a cooling pipe (222) for supplying cold water. The heating pipe (221) and the cooling pipe (222) are arranged in a snake-like pattern and are made of copper or stainless steel.

5. A rubber injection molding machine with heat preservation and heating function according to claim 4, characterized in that, An electric heater (54) is installed at one end of the oil storage tank (51) away from the connecting arm (53). The two ends of the oil storage tank (51) are respectively connected to an oil drain pipe (56) and a back pressure pipe (57). The oil drain pipe (56) and the back pressure pipe (57) are connected to the two ends of the heating pipe (221).

6. A rubber injection molding machine with heat preservation and heating function according to claim 5, characterized in that, A chiller (4) is provided on one side of the equipment base (3), and the drain end and return end of the chiller (4) are connected to both ends of the cooling pipe (222).

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