Injection mold for sealing strip production

Abstract

The utility model provides an injection mold for sealing strip production, and relates to the technical field of sealing strip production and processing. The injection mold for sealing strip production comprises a fixed mold and an upper mold arranged over the fixed mold, a lower mold cavity is formed in the top of the fixed mold, and an upper mold cavity is formed in the bottom of the upper mold. According to the device, an upper mold is controlled to descend, an upper mold cavity and a lower mold cavity are combined together to form an injection molding cavity, materials are injected into the injection molding cavity through an injection molding hole, and after injection molding is completed, a movable rod is driven to do reciprocating lifting sliding in a sleeve under the action of an extrusion mechanism, a spring and a sliding piece; one end of the movable rod repeatedly impacts the bottom of the ejector plate to enable the ejector plate to vibrate, workpieces are separated through vibration to avoid adhesion, the sleeve is controlled to slide upwards, the ejector plate moves upwards to eject out the formed workpieces in the lower mold cavity, and the purpose of quick demolding is achieved.

Description

Technical Field

[0001] The utility model relates to an injection mold, in particular to an injection mold for producing sealing strips, belonging to the technical field of sealing strip production and processing. Background Technique

[0002] A sealing strip is a product that seals something to make it not easy to open and plays roles such as shock absorption, waterproofing, sound insulation, heat insulation, dust prevention, and fixing. Sealing strips are made of various materials such as rubber, paper, metal, and plastic, and are usually produced by injection molding using an injection mold.

[0003] Chinese Patent Publication No. CN216578970U discloses an injection mold for producing automotive sealing strips, which includes a placement plate. The bottom end of the placement plate is connected with support legs. A moving structure and an opening and closing structure are provided on the placement plate. A lower mold is connected to the moving structure, and an upper mold is rotatably connected to the lower mold. The opening and closing structure includes a connecting rod. The connecting rod is rotatably connected to the upper mold. The connecting rod is connected with a connecting shaft, and the connecting shaft is slidably matched with a guiding groove. The guiding groove is arranged on a connecting plate, and the connecting plate is connected to the placement plate.

[0004] However, the inventor believes that the above device has certain defects. When demolding, the workpiece is likely to adhere to the inner wall of the mold, which brings certain inconvenience to the demolding process. Therefore, the utility model provides an injection mold for producing sealing strips. Content of the Utility Model

[0005] The purpose of the utility model is to provide an injection mold for producing sealing strips to solve the problem that in the prior art, the workpiece is likely to adhere to the inner wall of the mold during demolding, which brings certain inconvenience to the demolding process.

[0006] The utility model is realized through the following technical solutions: An injection mold for the production of sealing strips, comprising a fixed mold and an upper mold arranged directly above the fixed mold. A lower mold cavity is formed at the top of the fixed mold, an upper mold cavity is formed at the bottom of the upper mold, an injection hole communicating with the upper mold cavity is formed at the top of the upper mold. An activity cavity is formed on the fixed mold, and a blanking mechanism is arranged inside the activity cavity. The blanking mechanism includes a sleeve sliding inside the activity cavity, one end of the sleeve extends into the lower mold cavity, a blanking plate is fixedly connected to the top of the sleeve, a movable rod is slidably connected inside the sleeve, the top of the movable rod abuts against the bottom of the blanking plate, a fixed plate is fixedly connected inside the sleeve, the movable rod and the fixed plate are connected by a spring, a sliding piece is fixedly connected to the movable rod, a side sliding groove is formed on the sleeve, and the sliding piece slides inside the side sliding groove. An extrusion mechanism for repeatedly extruding the sliding piece is arranged inside the activity cavity.

[0007] Preferably, the extrusion mechanism includes a rotating rod rotating inside the activity cavity, and a fixed rod corresponding to the sliding piece is fixedly connected to the rotating rod. By driving the rotating rod to rotate, the top of the sliding piece is extruded by the fixed rod to drive the movable rod to slide downward inside the sleeve.

[0008] Preferably, a motor for driving the rotating rod to rotate is fixedly connected to the fixed mold, a controller is fixedly connected to the fixed mold, and the motor is electrically connected to the controller. The controller is provided to facilitate the operation and control of the motor.

[0009] Preferably, the top of the movable rod is hemispherical, and a counterweight plate is fixedly connected to the bottom of the sleeve. The counterweight plate is provided to enable the sleeve to quickly descend and reset when not under force.

[0010] Preferably, a fixed sliding rod is fixedly connected to the top of the fixed mold, the upper mold is slidably connected to the fixed sliding rod, and a lifting mechanism for driving the upper mold to lift and slide is fixedly connected to the top of the fixed sliding rod. The fixed sliding rod is provided to enable the upper mold to stably lift and lower directly above the fixed mold.

[0011] Preferably, the lifting mechanism includes a telescopic cylinder, a top frame is fixedly connected to the top of the fixed sliding rod, the telescopic cylinder is fixedly connected to the top of the top frame, and the telescopic end of the telescopic cylinder is fixedly connected to the upper mold. By starting the telescopic cylinder, the upper mold is controlled to lift and slide on the fixed sliding rod.

[0012] Preferably, a cooling pipe is embedded in the top of the fixed mold, and both the water inlet end and the water drainage end of the cooling pipe extend to one side surface of the fixed mold. By injecting cold water into the cooling pipe, the formed part inside the lower mold cavity is cooled.

[0013] The present utility model provides an injection mold for the production of sealing strips, and the beneficial effects thereof are as follows:

[0014] The device forms an injection cavity by combining the upper die cavity and the lower die cavity when the upper die descends through control. The injection cavity is filled with material through an injection hole. After injection, under the action of an extrusion mechanism, a spring, and a sliding piece, a movable rod reciprocates up and down and slides inside a sleeve. One end of the movable rod repeatedly impacts the bottom of a knockout plate, causing the knockout plate to vibrate. The workpiece is separated by vibration to avoid adhesion. By controlling the upward sliding of the sleeve, the formed workpiece inside the lower die cavity is ejected by the upward movement of the knockout plate, achieving the purpose of rapid demolding.

[0015] The device drives a rotating rod to rotate by starting a motor. When the rotating rod rotates counterclockwise, a fixed rod is used to squeeze the sliding piece to descend. When the sliding piece descends a certain distance, the fixed rod slides away from the sliding piece, and then the sliding piece is quickly driven to slide back to its original position by the rebound of the spring. When the rotating rod rotates clockwise, the fixed rod squeezes the bottom of the sliding piece, and under the blocking action of the top of the side chute, the whole sleeve is pushed upward to achieve the purpose of knocking out the material. Description of the Drawings

[0016] Figure 1 is the overall three-dimensional view of the present utility model;

[0017] Figure 2 is the cross-sectional view of the lower die cavity and the upper die cavity of the present utility model;

[0018] Figure 3 is the Figure 2 enlarged schematic view at position A of the present utility model;

[0019] Figure 4 is the sectional three-dimensional view of the sleeve of the present utility model;

[0020] Figure 5 is the installation schematic diagram of the cooling pipe of the present utility model.

[0021]

Description of the Main Component Symbols

[0022] 1. Fixed mold; 2. Lower die cavity; 3. Upper die; 31. Injection hole; 4. Upper die cavity; 5. Movable cavity; 6. Sleeve; 61. Movable rod; 62. Fixed plate; 63. Spring; 64. Side chute; 65. Sliding piece; 66. Counterweight plate; 7. Knockout plate; 8. Rotating rod; 81. Fixed rod; 82. Motor; 9. Fixed slide bar; 91. Top frame; 92. Telescopic cylinder; 10. Controller; 11. Cooling pipe. Specific Embodiments

[0023] An embodiment of the present utility model provides an injection mold for the production of sealing strips.

[0024] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 ,an injection mold for the production of sealing strips, comprising a fixed mold 1 and an upper mold 3 arranged directly above the fixed mold 1. A lower mold cavity 2 is formed at the top of the fixed mold 1, and an upper mold cavity 4 is formed at the bottom of the upper mold 3. An injection hole 31 communicating with the upper mold cavity 4 is formed at the top of the upper mold 3. By placing the upper mold 3 on the top of the fixed mold 1, the lower mold cavity 2 and the upper mold cavity 4 are combined to form an injection cavity, and raw materials are injected into the injection cavity through the injection hole 31. A cooling pipe 11 is embedded in the top of the fixed mold 1, and both the water inlet end and the water drainage end of the cooling pipe 11 extend to one side surface of the fixed mold 1. By connecting the water inlet end and the water drainage end of the cooling pipe 11 to an external water supply device and a water collection device respectively, cold water is injected into the interior of the cooling pipe 11 to cool the materials inside the injection cavity by water cooling, improving the processing efficiency of the workpiece.

[0025] Please refer to again Figure 1 and Figure 2 ,a fixed sliding rod 9 is fixedly connected to the top of the fixed mold 1, and the upper mold 3 is slidably connected to the fixed sliding rod 9. A lifting mechanism for driving the up-and-down sliding of the upper mold 3 is fixedly connected to the top of the fixed sliding rod 9. The lifting mechanism includes a telescopic cylinder 92. A top frame 91 is fixedly connected to the top of the fixed sliding rod 9, and the telescopic cylinder 92 is fixedly connected to the top of the top frame 91. The telescopic end of the telescopic cylinder 92 is fixedly connected to the upper mold 3. By starting the telescopic cylinder 92 to control the up-and-down movement of the upper mold 3 and sliding the two ends of the upper mold 3 on the fixed sliding rod 9, the stability of the up-and-down movement of the upper mold 3 is improved.

[0026] Please refer to again Figure 1 、 Figure 2 、 Figure 3 and Figure 4 ,a movable cavity 5 is formed on the fixed mold 1, and a top material mechanism is arranged inside the movable cavity 5. The top material mechanism includes a sleeve 6 slidably arranged inside the movable cavity 5. One end of the sleeve 6 extends into the lower mold cavity 2, and a top plate 7 is fixedly connected to the top of the sleeve 6. The top plate 7 is placed on the inner bottom wall of the lower mold cavity 2. By pushing the sleeve 6 to slide upward, the formed workpiece is pushed out of the interior of the lower mold cavity 2 under the action of the top plate 7.

[0027] Please refer to again Figure 1 、 Figure 2 、 Figure 3 and Figure 4, a movable rod 61 is slidably connected inside the sleeve 6. The top of the movable rod 61 abuts against the bottom of the blanking plate 7. The top of the sleeve 6 is open. A fixed plate 62 is fixedly connected inside the sleeve 6. The movable rod 61 and the fixed plate 62 are connected by a spring 63. A sliding piece 65 is fixedly connected to the movable rod 61. A side sliding groove 64 is formed on the sleeve 6. The sliding piece 65 slides inside the side sliding groove 64. By squeezing the sliding piece 65 to slide downward inside the side sliding groove 64, the movable rod 61 is pulled to slide downward inside the sleeve 6. Then, the pressure on the sliding piece 65 is removed. The spring 63 rebounds to quickly drive the movable rod 61 to slide back to its original position. The top of the movable rod 61 impacts the bottom of the blanking plate 7 to generate vibration. Through the vibration, the workpiece is separated to avoid adhesion. The top of the movable rod 61 is hemispherical. A counterweight plate 66 is fixedly connected to the bottom of the sleeve 6. By providing the counterweight plate 66, the sleeve 6 can quickly slide down and reset when not under force.

[0028] Please refer to again Figure 1 , Figure 2 , Figure 3 and Figure 4 , an extrusion mechanism for repeatedly extruding the sliding piece 65 is provided inside the movable cavity 5. The extrusion mechanism includes a rotating rod 8 rotating inside the movable cavity 5. A fixed rod 81 corresponding to the sliding piece 65 is fixedly connected to the rotating rod 8. A motor 82 for driving the rotating rod 8 to rotate is fixedly connected to the fixed mold 1. A controller 10 is fixedly connected to the fixed mold 1. The output end of the motor 82 is controlled to rotate through the controller 10. By starting the motor 82 to drive the rotating rod 8 to rotate counterclockwise, the fixed rod 81 first extrudes the top of the sliding piece 65 to push the sliding piece 65 to slide inside the side sliding groove 64. When the sliding piece 65 slides a certain distance, the fixed rod 81 slides away from the sliding piece 65. The spring 63 rebounds to drive the sliding piece 65 to quickly reset. The bottom of the blanking plate 7 is repeatedly impacted by the movable rod 61 through the continuous rotation and extrusion of the fixed rod 81 and the rebound of the spring 63. When the rotating rod 8 is driven to rotate clockwise, the fixed rod 81 first extrudes the bottom of the sliding piece 65. The whole sleeve 6 is pushed to slide upward through the blocking effect of the side sliding groove 64 to achieve the purpose of blanking.

[0029] Working principle: Install the device in a suitable position. By starting the telescopic cylinder 92, push the upper mold 3 downward so that it lands on the top of the fixed mold 1. An injection cavity is formed by the lower mold cavity 2 and the upper mold cavity 4. Inject raw materials into the interior of the injection cavity through the injection hole 31. Accelerate the cooling and molding of the raw materials by injecting cold water into the interior of the cooling pipe 11. After molding, start the motor 82 to drive the rotating rod 8 to rotate counterclockwise. The continuous rotation of the fixed rod 81 squeezes the top of the sliding piece 65 and the rebound of the spring 63 drives the movable rod 61 to repeatedly strike the bottom of the ejector plate 7, causing the ejector plate 7 to vibrate. During the vibration process, the bonding part between the workpiece and the mold breaks. After the vibration is completed, control the output rotating shaft end of the motor 82 to rotate clockwise through the controller 10. The fixed rod 81 squeezes the bottom of the sliding piece 65 to push the sleeve 6 to slide upward as a whole. The workpiece in the lower mold cavity 2 is ejected by the ejector plate 7.

[0030] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold for producing a sealing strip, comprising a fixed mold (1) and an upper mold (3) arranged directly above the fixed mold (1), characterized in that: The top of the fixed mold (1) is provided with a lower mold cavity (2), the bottom of the upper mold (3) is provided with an upper mold cavity (4), the top of the upper mold (3) is provided with an injection hole (31) which is connected to the upper mold cavity (4), the fixed mold (1) is provided with a movable cavity (5), the interior of the movable cavity (5) is provided with a material ejection mechanism, the material ejection mechanism comprises a sleeve (6) which slides inside the movable cavity (5), one end of the sleeve (6) extends into the interior of the lower mold cavity (2), the top of the sleeve (6) is fixedly connected with a material ejection plate (7), and the sleeve ( A movable rod (61) is slidably connected inside the sleeve (6), the top of the movable rod (61) is tightly abutted against the bottom of the ejection plate (7), a fixed plate (62) is fixedly connected inside the sleeve (6), the movable rod (61) and the fixed plate (62) are connected via a spring (63), a sliding plate (65) is fixedly connected to the movable rod (61), a side sliding groove (64) is provided on the sleeve (6), the sliding plate (65) slides inside the side sliding groove (64), and an extrusion mechanism for repeatedly extruding the sliding plate (65) is provided inside the movable cavity (5).

2. The injection mold for producing a sealing strip according to claim 1, characterized in that: The extrusion mechanism comprises a rotating rod (8) rotating inside the movable chamber (5), and a fixed rod (81) arranged corresponding to the sliding sheet (65) is fixedly connected to the rotating rod (8).

3. The injection mold for producing a sealing strip according to claim 2, characterized in that: A motor (82) for driving the rotating rod (8) to rotate is fixedly connected to the fixed mold (1), a controller (10) is fixedly connected to the fixed mold (1), and the motor (82) is electrically connected to the controller (10).

4. The injection mold for producing a sealing strip according to claim 1, characterized in that: The top of the movable rod (61) is hemispherical, and the bottom of the sleeve (6) is fixedly connected to a counterweight plate (66).

5. The injection mold for producing a sealing strip according to claim 1, characterized in that: The top of the fixed mold (1) is fixedly connected to a fixed slide bar (9), the upper mold (3) is slidably connected to the fixed slide bar (9), and the top of the fixed slide bar (9) is fixedly connected to a lifting mechanism for driving the upper mold (3) to lift and slide.

6. The injection mold for producing a sealing strip according to claim 5, characterized in that: The lifting mechanism comprises a telescopic cylinder (92), the top of the fixed slide rod (9) is fixedly connected to a top frame (91), the telescopic cylinder (92) is fixedly connected to the top of the top frame (91), and the telescopic end of the telescopic cylinder (92) is fixedly connected to the upper mold (3).

7. The injection mold for producing a sealing strip according to claim 1, characterized in that: A cooling pipe (11) is embedded on the top of the fixed mold (1), and a water inlet end and a water outlet end of the cooling pipe (11) both extend to a side surface of the fixed mold (1).

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