Homogeneous injection mold for plastic chair production

Abstract

The utility model relates to the technical field of injection molds, and discloses a homogeneous injection mold for plastic chair production, which comprises a working table, a fixed mold is fixedly mounted on the upper surface of the working table, a top frame is fixedly mounted on the upper surface of the working table, and a hydraulic cylinder is fixedly mounted on the upper surface of the top frame. A swing knocking assembly is arranged on the lower surface of the workbench. By arranging the swing knocking assembly, the motion trails of the U-shaped frame and the T-shaped sliding block can cover the whole workbench and the mounting area of the fixed mold, a knocking rod is driven to impact the bottom of the workbench due to centrifugal force and inertia generated by rotation of a rotary disc, and then the bottom of the workbench is knocked out due to inertia motion. And the connecting rod can drive the auxiliary rod to impact again so as to continuously generate a knocking vibration effect on the worktable and the bottom of the fixed mold, so that the uniform distribution of the molten material injected into the fixed mold is effectively promoted, and the injection molding production quality of the plastic chair is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a homogeneous injection mold for producing plastic chairs. Background Art

[0002] Plastic chairs are a common type of furniture, and plastic chairs are generally produced using injection molds during large-scale production. Injection molding is a processing method used in mass production of certain parts with complex shapes. It specifically refers to the production process of injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and obtaining plastic products after cooling and solidification.

[0003] According to a casting device for a precision and complex injection mold (announcement number: CN215550710U) disclosed, in the above application, the two high-frequency vibration generators on the top of the waterproof baffle are connected to an external power supply through a power supply base, and the two high-frequency vibration generators are both fitted with the bottom end surface of the injection mold through the waterproof baffle. When the injection molding machine injects the injection molding material into the inner cavity of the injection mold, the two high-frequency vibration generators are used to synchronously vibrate the injection mold with high frequency, so that the injection molding material can be quickly and evenly filled in every corner of the internal cavity of the injection mold.

[0004] However, in actual use, the high-frequency vibration structure of the above-mentioned equipment has a limited influence on the bottom cross-section of the entire injection mold. If the vibration influence is to be increased, the power needs to be increased, but such operation will also affect the static molding state of the injection plastic near the operating position of the vibration structure, thereby affecting the use effect of the homogeneous injection mold. In view of this, we propose a homogeneous injection mold for the production of plastic chairs. Utility Model Content

[0005] The purpose of the utility model is to provide a homogeneous injection mold for producing plastic chairs to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a homogeneous injection mold for producing plastic chairs, comprising a workbench, a fixed mold is fixedly installed on the upper surface of the workbench, a top frame is fixedly installed on the upper surface of the workbench, a hydraulic cylinder is fixedly installed on the upper surface of the top frame, a movable mold is fixedly installed on the output end of the hydraulic cylinder, and a swinging knocking assembly is arranged on the lower surface of the workbench, and the swinging knocking assembly comprises:

[0007] A mounting frame, wherein the mounting frame is fixedly mounted on the lower surface of the workbench, a U-shaped frame is slidably mounted on the inner wall of the mounting frame, a motor 1 is fixedly mounted on the bottom side wall of the mounting frame, a screw 1 is fixedly mounted on the output end of the motor 1, a motor 2 is fixedly mounted on the outer wall of the end of the U-shaped frame, a screw 2 is fixedly mounted on the output end of the motor 2, and a T-shaped slider is threadedly connected to the outer wall of the screw 2;

[0008] A mounting plate, wherein the mounting plate is fixedly mounted on the upper surface of the T-shaped slider, a driving motor is fixedly mounted on the side wall of the mounting plate, a rotating rod is fixedly mounted on the output end of the driving motor, a rotating disk is penetrated and fixedly mounted on the outer wall of the rotating rod, a round rod is rotatably mounted on the side wall of the rotating disk, a swing rod is fixedly mounted on the end of the round rod, a knocking rod is rotatably mounted on the end of the swing rod away from the round rod, one end of a connecting rod is penetrated and rotatably mounted at the end axis of the knocking rod, and an auxiliary rod is rotatably mounted on the other end of the connecting rod.

[0009] Preferably, the inner surface of the mounting frame is provided with a rectangular groove matched with the top side of the U-shaped frame, and the inner wall of the U-shaped frame is threadedly connected to the screw rod, so that the U-shaped frame can move horizontally along the inner surface of the mounting frame when the motor is started, and the inner wall of the U-shaped frame is provided with a T-shaped groove matched with the T-shaped slider to guide and limit the movement of the T-shaped slider.

[0010] Preferably, a coil spring is sleeved on the arc-shaped outer wall of the round rod, and a circular hole with a diameter larger than the outer diameter of the coil spring is opened on the side wall of the turntable, and the end of the round rod is rotatably mounted on the arc-shaped inner wall of the circular hole. Specifically, the two ends of the coil spring are respectively fixedly connected to the arc-shaped outer wall of the round rod and the bottom inner wall of the circular hole, so that the round rod always has a tendency to rotate in the opposite direction to achieve reset when rotating.

[0011] Preferably, the diameter of the knocking rod is larger than the outer diameter of the auxiliary rod, and both the knocking rod and the auxiliary rod include an inner rod and an outer cylinder sleeved on the outer side of the inner rod.

[0012] Preferably, the number of the mounting plates is two, and the two groups of mounting plates are arranged on both sides of the turntable, and the number of the round rods is two, and the two groups of round rods are mirror-imaged and arranged on the left and right sides of the turntable.

[0013] Preferably, a torsion pendulum assembly is provided on the outer side of the rotating rod, and the torsion pendulum assembly includes a protrusion, which is fixedly mounted on the arc-shaped outer wall of the swing rod close to one end of the round rod, a sleeve disc is rotatably mounted on the side wall of the mounting plate, a large gear passes through and is fixedly mounted on the outer wall of the rotating rod, a small gear is rotatably mounted on the inner wall of the sleeve disc, and an elastic shift block is fixedly mounted on the arc-shaped outer wall of the sleeve disc.

[0014] Preferably, a circular cavity is provided inside the sleeve, and a tooth pattern for meshing with a pinion gear and realizing transmission is provided on the arc-shaped inner wall of the circular cavity.

[0015] Compared with the prior art, the utility model provides a homogeneous injection mold for producing plastic chairs, which has the following beneficial effects:

[0016] 1. The homogeneous injection mold for producing plastic chairs is provided with a swinging and knocking assembly, which starts motors 1 and 2 and cooperates with screws 1 and 2, so that the movement trajectories of the U-shaped frame and the T-shaped slider can cover the entire workbench and the installation area of ​​the fixed mold. At the same time, through the drive of the drive motor, the centrifugal force and inertia generated by the rotation of the turntable cause the round rod to deflect the swing rod, thereby driving the knocking rod to impact the bottom of the workbench. After that, due to inertial movement, the connecting rod can drive the auxiliary rod to impact again, so as to continuously produce the effect of knocking and vibrating the bottom of the workbench and the fixed mold, thereby effectively promoting the uniform distribution of the molten material injected into the fixed mold, thereby ensuring the quality of the injection molding production of plastic chairs.

[0017] 2. The homogeneous injection mold for producing plastic chairs is provided with a torsion pendulum assembly. When the driving motor drives the rotating rod to rotate, the transmission of the large gear and the small gear drives the sleeve disc to rotate at a speed lower than the speed of the rotating rod on the outside of the rotating rod, so that there is a certain speed difference between the sleeve disc and the turntable. When the swing rod drives the knocking rod to knock the bottom of the workbench due to inertia and the rotation of the turntable, the sleeve disc intermittently drives the elastic pick block to push the protrusion in the opposite direction, so as to relatively disrupt the knocking frequency of the knocking rod and the auxiliary rod, so that the knocking frequency of the workbench and the fixed mold is approximately disordered, so as to better realize the uniform distribution of the injection molten bored material in the mold cavity of the fixed mold and ensure the injection molding production quality of the plastic chair. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the mounting frame of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the T-shaped slider of the utility model;

[0021] Figure 4 This is a schematic diagram of the turntable structure of the utility model;

[0022] Figure 5 It is a schematic diagram of a partial three-dimensional structure of the swing and striking component of the utility model;

[0023] Figure 6 It is a schematic diagram of the cross-sectional structure of the sleeve disc of the utility model.

[0024] In the figure: 1. workbench; 2. fixed mold; 3. top frame; 4. hydraulic cylinder; 5. movable mold; 6. swing and knocking assembly; 61. mounting frame; 62. U-shaped frame; 63. motor 1; 64. screw 1; 65. motor 2; 66. screw 2; 67. T-shaped slider; 68. mounting plate; 69. driving motor; 610. rotating rod; 611. rotating disk; 612. round rod; 613. swing rod; 614. knocking rod; 615. connecting rod; 616. auxiliary rod; 7. torsion pendulum assembly; 71. bump; 72. sleeve; 73. large gear; 74. small gear; 75. elastic shift block. DETAILED DESCRIPTION

[0025] like Figure 1-Figure 6 As shown, the utility model provides a technical solution: a homogeneous injection mold for producing plastic chairs, including a workbench 1, a fixed mold 2 is fixedly installed on the upper surface of the workbench 1, a top frame 3 is fixedly installed on the upper surface of the workbench 1, a hydraulic cylinder 4 is fixedly installed on the upper surface of the top frame 3, a movable mold 5 is fixedly installed on the output end of the hydraulic cylinder 4, and a swinging and knocking assembly 6 is arranged on the lower surface of the workbench 1. The swinging and knocking assembly 6 includes a mounting frame 61, a U-shaped frame 62, a motor 1 63, a screw 1 64, a motor 2 65, a screw 2 66, a T-shaped slider 67, a mounting plate 68, a driving motor 69, a rotating rod 610, a rotating disk 611, a round rod 612, a swing rod 613, a knocking rod 614, a connecting rod 615, and an auxiliary rod 616.

[0026] In one embodiment of the utility model, a mounting frame 61 is fixedly mounted on the lower surface of the workbench 1, a U-shaped frame 62 is slidably mounted on the inner wall of the mounting frame 61, a motor 1 63 is fixedly mounted on the bottom side wall of the mounting frame 61, a screw 1 64 is fixedly mounted on the output end of the motor 1 63, a motor 2 65 is fixedly mounted on the outer wall of the end of the U-shaped frame 62, a screw 2 66 is fixedly mounted on the output end of the motor 2 65, a T-shaped slider 67 is threadedly connected to the outer wall of the screw 2 66, and a mounting plate 68 is fixedly mounted on the upper surface of the T-shaped slider 67. A driving motor 69 is fixedly installed on the side wall of the plate 68, and a rotating rod 610 is fixedly installed on the output end of the driving motor 69. A turntable 611 is penetrated and fixedly installed on the outer wall of the rotating rod 610, and a round rod 612 is rotatably installed on the side wall of the turntable 611. A swing rod 613 is fixedly installed on the end of the round rod 612, and a knocking rod 614 is rotatably installed on the end of the swing rod 613 away from the round rod 612. One end of the connecting rod 615 is penetrated and rotatably installed at the end axis of the knocking rod 614, and an auxiliary rod 616 is rotatably installed on the other end of the connecting rod 615.

[0027] Furthermore, the fixed mold 2 is arranged corresponding to the movable mold 5, and the movable mold 5 is arranged directly above the fixed mold 2. At the same time, a rectangular slide groove adapted to the top side of the U-shaped frame 62 is provided on the inner surface of the mounting frame 61, and the inner wall of the U-shaped frame 62 is threadedly connected to the screw rod 64, so that the U-shaped frame 62 can move horizontally along the inner surface of the mounting frame 61 when the motor 63 is started. In addition, a T-shaped groove adapted to the T-shaped slider 67 is provided on the inner wall of the U-shaped frame 62 to guide and limit the movement of the T-shaped slider 67. In other words, when the motor 2 65 is started, in conjunction with the rotation of the screw rod 2 66, the T-shaped slider 67 can only move horizontally along the inner wall of the U-shaped frame 62. It is worth noting that the screw rod 1 64 and the screw rod 2 66 are arranged perpendicular to each other, so that the screw rod 1 64 and the screw rod 2 66 cooperate with each other to control the T-shaped slider 67 to move in two-axis directions on the bottom plane of the workbench 1, so that the operating range of the knocking rod 614 covers various positions on the lower surface of the workbench 1, thereby meeting the needs of knocking and vibration at different positions on the bottom of the fixed mold 2.

[0028] In addition, there are two groups of mounting plates 68, and the two groups of mounting plates 68 are arranged on both sides of the turntable 611, and there are two groups of round rods 612, and the two groups of round rods 612 are mirror-imaged and arranged on the left and right sides of the turntable 611. Furthermore, a coil spring is sleeved on the arc-shaped outer wall of the round rod 612, and a circular hole with a diameter larger than the outer diameter of the coil spring is opened on the side wall of the turntable 611, and the end of the round rod 612 is rotatably mounted on the arc-shaped inner wall of the circular hole. Specifically, the two ends of the coil spring are respectively fixedly connected to the arc-shaped outer wall of the round rod 612 and the bottom inner wall of the circular hole, so that the round rod 612 always has a movement tendency of reverse rotation to achieve reset when rotating. In addition, the diameter of the knocking rod 614 is larger than the outer diameter of the auxiliary rod 616, and the knocking rod 614 and the auxiliary rod 616 both include an inner rod and an outer cylinder sleeved on the outer side of the inner rod. The inner rod is made of metal material, and the outer tube is made of rubber tube. While ensuring the knocking and vibration effect of the knocking rod 614 and the auxiliary rod 616 on the bottom of the workbench 1 and the bottom of the fixed mold 2, damage to the bottom surface of the workbench 1 and the bottom surface of the fixed mold 2 is avoided. Specifically, with the drive of the driving motor 69, the turntable 611 continues to rotate. Due to the centrifugal force and inertia generated by the rotation of the turntable 611, the round rod 612 drives the swing rod 613 to deflect, and then drives the knocking rod 614 to impact the bottom of the workbench 1. After that, due to inertial motion, the connecting rod 615 can drive the auxiliary rod 616 to impact again, so as to continuously produce the effect of knocking and vibrating the bottom of the workbench 1 and the fixed mold 2, thereby effectively promoting the uniform distribution of the molten material injected into the fixed mold 2, thereby ensuring the quality of the injection molding production of plastic chairs.

[0029] Please refer to the manual for Figure 3 and Figure 6 A torsion pendulum assembly 7 is arranged on the outer side of the rotating rod 610, and the torsion pendulum assembly 7 includes a protrusion 71, and the protrusion 71 is fixedly mounted on the arc-shaped outer wall of the swing rod 613 close to one end of the round rod 612. A sleeve disc 72 is rotatably mounted on the side wall of the mounting plate 68. A large gear 73 passes through and is fixedly mounted on the outer wall of the rotating rod 610, a small gear 74 is rotatably mounted on the inner wall of the sleeve disc 72, and an elastic shift block 75 is fixedly mounted on the arc-shaped outer wall of the sleeve disc 72.

[0030] In the embodiment of the utility model, a circular cavity is provided inside the sleeve 72, and a tooth pattern that meshes with the pinion 74 and realizes transmission is provided on the arc-shaped inner wall of the circular cavity. Specifically, when the driving motor 69 drives the rotating rod 610 to rotate, the transmission of the large gear 73 and the small gear 74 drives the sleeve 72 to rotate at a speed lower than the speed of the rotating rod 610 on the outer side of the rotating rod 610, so that there is a certain speed difference between the sleeve 72 and the rotating disk 611. When the swing rod 613 drives the knocking rod 614 to knock on the bottom of the workbench 1 due to inertia and the rotation of the rotating disk 611, the sleeve 72 intermittently drives the elastic shift block 75 to push the protrusion 71 in the opposite direction, so as to relatively disrupt the knocking frequency of the knocking rod 614 and the auxiliary rod 616, so that the knocking frequency of the workbench 1 and the fixed mold 2 is approximately disordered, so as to better realize the uniform distribution of the injection molten material in the mold cavity of the fixed mold 2 and ensure the injection molding production quality of the plastic chair.

[0031] In the utility model, when in use, the hydraulic cylinder 4 is driven to control the movable mold 5 to move downward and close the mold with the fixed mold 2, and then the molten material is injected into the mold cavity formed between the fixed mold 2 and the movable mold 5 through the injection tube on the top of the movable mold 5. At the same time, the motor 1 63 and the motor 2 65 are started, and the screw 1 64 and the screw 2 66 are coordinated so that the movement trajectory of the U-shaped frame 62 and the T-shaped slider 67 can cover the entire workbench 1 and the installation area of ​​the fixed mold 2. At the same time, through the drive of the drive motor 69, due to the centrifugal force and inertia generated by the rotation of the turntable 611, the round rod 612 drives the swing rod 613 to deflect, and then drives the knocking rod 614 to impact the bottom of the workbench 1. After that, due to the inertial movement, the connecting rod 615 can drive the auxiliary rod 616 to impact again, so as to continuously produce the effect of knocking and vibrating the bottom of the workbench 1 and the fixed mold 2, thereby effectively promoting the uniform distribution of the molten material injected into the fixed mold 2, thereby ensuring the quality of the injection molding production of plastic chairs.

[0032] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A homogeneous injection mold for producing plastic chairs, comprising a workbench (1), a fixed mold (2) fixedly mounted on the upper surface of the workbench (1), a top frame (3) fixedly mounted on the upper surface of the workbench (1), a hydraulic cylinder (4) fixedly mounted on the upper surface of the top frame (3), and a movable mold (5) fixedly mounted on the output end of the hydraulic cylinder (4), characterized in that: The lower surface of the workbench (1) is provided with a swinging and knocking assembly (6), and the swinging and knocking assembly (6) comprises: A mounting frame (61), the mounting frame (61) being fixedly mounted on the lower surface of the workbench (1), a U-shaped frame (62) being slidably mounted on the inner wall of the mounting frame (61), a motor 1 (63) being fixedly mounted on the bottom side wall of the mounting frame (61), a screw 1 (64) being fixedly mounted on the output end of the motor 1 (63), a motor 2 (65) being fixedly mounted on the outer wall of the end of the U-shaped frame (62), a screw 2 (66) being fixedly mounted on the output end of the motor 2 (65), and a T-shaped slider (67) being threadedly connected to the outer wall of the screw 2 (66); A mounting plate (68) is fixedly mounted on the upper surface of the T-shaped slider (67); a driving motor (69) is fixedly mounted on the side wall of the mounting plate (68); a rotating rod (610) is fixedly mounted on the output end of the driving motor (69); a rotating disk (611) is passed through and fixedly mounted on the outer wall of the rotating rod (610); a round rod (612) is rotatably mounted on the side wall of the rotating disk (611); a swing rod (613) is fixedly mounted on the end of the round rod (612); a knocking rod (614) is rotatably mounted on one end of the swing rod (613) away from the round rod (612); one end of a connecting rod (615) is passed through and rotatably mounted on the end axis of the knocking rod (614); an auxiliary rod (616) is rotatably mounted on the other end of the connecting rod (615).

2. The homogeneous injection mold for producing plastic chairs according to claim 1, characterized in that: The inner surface of the mounting frame (61) is provided with a rectangular sliding groove adapted to the top side of the U-shaped frame (62), and the inner wall of the U-shaped frame (62) is threadedly connected to the screw rod 1 (64), and the inner wall of the U-shaped frame (62) is provided with a T-shaped groove adapted to the T-shaped sliding block (67).

3. The homogeneous injection mold for producing plastic chairs according to claim 1, characterized in that: A coil spring is sleeved on the arc-shaped outer wall of the round rod (612), and a circular hole having a diameter greater than the outer diameter of the coil spring is opened on the side wall of the rotating disk (611). At the same time, the end of the round rod (612) is rotatably mounted on the arc-shaped inner wall of the circular hole, and the two ends of the coil spring are respectively fixedly connected to the arc-shaped outer wall of the round rod (612) and the bottom inner wall of the circular hole.

4. The homogeneous injection mold for producing plastic chairs according to claim 1, characterized in that: The diameter of the knocking rod (614) is greater than the outer diameter of the auxiliary rod (616), and the knocking rod (614) and the auxiliary rod (616) both comprise an inner rod and an outer cylinder sleeved on the outer side of the inner rod.

5. The homogeneous injection mold for producing plastic chairs according to claim 1, characterized in that: The number of the mounting plates (68) is two groups, and the two groups of mounting plates (68) are arranged on both sides of the turntable (611); the number of the round rods (612) is two groups, and the two groups of round rods (612) are arranged in a mirror-image manner on the left and right sides of the turntable (611).

6. The homogeneous injection mold for producing plastic chairs according to claim 1, characterized in that: A torsion swing assembly (7) is arranged on the outer side of the rotating rod (610), and the torsion swing assembly (7) includes a protrusion (71), and the protrusion (71) is fixedly mounted on the arc-shaped outer wall of the swing rod (613) close to one end of the round rod (612). A sleeve disc (72) is rotatably mounted on the side wall of the mounting plate (68), a large gear (73) passes through and is fixedly mounted on the outer wall of the rotating rod (610), a small gear (74) is rotatably mounted on the inner wall of the sleeve disc (72), and an elastic shift block (75) is fixedly mounted on the arc-shaped outer wall of the sleeve disc (72).

7. The homogeneous injection mold for producing plastic chairs according to claim 6, characterized in that: A circular cavity is provided inside the sleeve (72), and a tooth pattern for meshing with the pinion (74) and realizing transmission is provided on the arc-shaped inner wall of the circular cavity.

Images