Plastic bottle blank injection molding machine

Abstract

The utility model discloses a plastic bottle blank injection molding machine which comprises a machine frame, a movable mold assembly and a fixed mold assembly are installed in the middle of the top of the machine frame, a supporting frame is installed in the middle of the top of the machine frame, and the supporting frame is connected with a support capable of moving front and back in a sliding mode. The support frame is provided with a first driving device for driving the support frame to move back and forth, the support frame is provided with an air cylinder which moves up and down, the bottom of the air cylinder is connected with a mounting seat, the mounting seat is hinged with a sucking and releasing frame, and the mounting seat is provided with a second driving device for driving the sucking and releasing frame to rotate. A plurality of suction and release positioning holes are formed in the suction and release frame, pneumatic suction cups are installed on the side portions of the suction and release positioning holes, and a conveying belt is arranged on the front side of the rack. The plastic bottle blank conveying device is stable in operation, plastic bottle blanks do not make contact with one another and are prevented from being damaged by collision, meanwhile, the plastic bottle blanks dissipate heat in the conveying process of the conveying belt and are not prone to deformation, quality stability is improved, and batch production is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, specifically to a plastic preform injection molding machine. Background Technology

[0002] A plastic preform is a blank made before blow molding of a plastic bottle, facilitating subsequent blow molding. A plastic preform injection molding machine is a molding device that uses plastic molds to form plastic preforms of various shapes from thermoplastic or thermosetting plastics. After injection molding, the plastic preform needs to be unloaded. However, traditional plastic preform injection molding machines directly unload the injection-molded preforms, which can easily lead to damage between preforms. Furthermore, because the preforms are relatively soft due to their high temperature after injection molding, they are prone to deformation, affecting the precision and efficiency of subsequent blow molding, impacting quality stability, and hindering mass production. Therefore, to avoid the shortcomings of existing technology, it is necessary to improve it. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies in the existing technology and provide a plastic preform injection molding machine that improves the stability of blow molding quality.

[0004] This utility model is achieved through the following technical solution:

[0005] A plastic preform injection molding machine includes a frame. A moving mold assembly and a fixed mold assembly are installed at the center of the top of the frame. A support frame is installed at the center of the top of the frame. A bracket that can move back and forth is slidably connected to the support frame. A first driving device for driving the bracket to move back and forth is installed on the support frame. A cylinder that moves up and down is installed on the bracket. A mounting base is connected to the bottom of the cylinder. A suction and discharge frame is hinged to the mounting base. The suction and discharge frame is located above the moving mold assembly and the fixed mold assembly. A second driving device for driving the suction and discharge frame to rotate is installed on the mounting base. The suction and discharge frame has a plurality of suction and discharge positioning holes. Pneumatic suction cups are installed on the sides of the suction and discharge positioning holes. A conveyor belt is provided on the front side of the frame.

[0006] Furthermore, a cooling fan is installed above the conveyor belt.

[0007] Furthermore, the first drive device includes a first motor, the motor shaft of the first motor is connected to a lead screw via a coupling, and the bracket is provided with a nut that is screwed to the lead screw.

[0008] Furthermore, the second drive device includes a second motor, the motor shaft of the second motor is connected to a drive wheel, and the mounting base is hinged to a driven sleeve connected to the suction and discharge frame via a hinge shaft. The drive wheel is throttle connected to the driven sleeve.

[0009] Furthermore, the outer side of the driving wheel is provided with driving teeth evenly distributed, and the outer side of the driven sleeve is provided with driven teeth that mesh with the driving teeth evenly distributed.

[0010] Furthermore, the support frame is provided with a slide rail extending in the front and rear directions, and the bracket is provided with a slider corresponding to the slide rail.

[0011] Furthermore, the bracket is provided with a mounting bracket for mounting the cylinder.

[0012] Furthermore, the suction and release frame is equipped with a mounting plate for mounting the pneumatic suction cup.

[0013] Furthermore, the suction and release frame is provided with a suction and release frame positioning strip, and the suction and release positioning hole is located on the inner side of the suction and release frame positioning strip. The suction and release frame positioning strip is connected by a connecting rod.

[0014] Furthermore, the suction and release frame is provided with several weight-avoidance openings.

[0015] Compared to existing technologies, this invention features a support frame with a first driving device that drives the support to move back and forth. The support frame has a cylinder that moves up and down, and a mounting base is connected to the bottom of the cylinder. A suction and release frame is hinged to the mounting base, and a second driving device is installed on the mounting base to drive the suction and release frame to rotate. The suction and release frame has several suction and release positioning holes, and pneumatic suction cups are installed on the sides of these holes. A conveyor belt is located on the front side of the frame. During operation, the cylinder drives the suction and release frame downwards, and the suction and release positioning holes of the frame enclose the demolded plastic preform. The pneumatic suction cups hold the plastic preform firmly in place. The cylinder then drives the suction and release frame upwards, the first driving device drives the frame forward, the second driving device drives the frame to rotate, and the cylinder drives the frame downwards. The pneumatic suction cups release their grip, and the plastic preform is placed onto the conveyor belt, preventing contact between preforms and avoiding damage. Simultaneously, the preform dissipates heat during conveying, reducing the likelihood of deformation and ensuring the subsequent blow molding precision and efficiency, improving quality stability and facilitating mass production. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the plastic preform injection molding machine of this utility model;

[0018] Figure 2 This is a schematic diagram of the suction and release rack of this utility model.

[0019] In the diagram: 1-Frame; 2-Moving mold assembly; 3-Fixed mold assembly; 4-Support frame; 5-Bracket; 6-Mounting base; 7-Suction rack; 8-Suction positioning hole; 9-Pneumatic suction cup; 10-Conveyor belt; 11-Cooling fan; 12-First motor; 13-Second motor; 14-Drive wheel; 15-Hinge shaft; 16-Driven sleeve; 17-Slide rail; 18-Mounting plate; 19-Suction rack positioning strip; 20-Connecting rod; 21-Weight avoidance opening. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1 and Figure 2The present invention discloses a plastic preform injection molding machine, comprising a frame 1, a moving mold assembly 2 and a fixed mold assembly 3 installed in the middle of the top of the frame 1, a support frame 4 installed in the middle of the top of the frame 1, a support bracket 5 slidably connected to the support frame 4, the support frame 4 being equipped with a first driving device for driving the support bracket 5 to move back and forth, the support bracket 5 being equipped with a cylinder for moving up and down, the bottom of the cylinder being connected to a mounting base 6, the mounting base 6 being hinged to a suction and discharge frame 7, the suction and discharge frame 7 being located above the moving mold assembly 2 and the fixed mold assembly 3, the mounting base 6 being equipped with a second driving device for driving the suction and discharge frame 7 to rotate, the suction and discharge frame 7 being provided with a plurality of suction and discharge positioning holes 8, pneumatic suction cups 9 being installed on the side of the suction and discharge positioning holes 8, and a conveyor belt 10 being provided on the front side of the frame 1. A first drive device for moving the support bracket 5 back and forth is installed on the support frame 4. The support bracket 5 is equipped with a cylinder for moving up and down. The bottom of the cylinder is connected to a mounting base 6. A suction and discharge frame 7 is hinged to the mounting base 6. A second drive device for driving the suction and discharge frame 7 to rotate is installed on the mounting base 6. The suction and discharge frame 7 is provided with several suction and discharge positioning holes 8. Pneumatic suction cups 9 are installed on the side of the suction and discharge positioning holes 8. A conveyor belt 10 is provided on the front side of the frame 1. During operation, the cylinder drives the suction and discharge frame 7 to move downward, and the suction and discharge positioning holes 8 of the suction and discharge frame 7 fit over the demolded plastic preform. The pneumatic suction cup 9 holds the plastic preform firmly, the cylinder drives the suction and release frame 7 to move upward, the first drive device drives the suction and release frame 7 to move forward, the second drive device drives the suction and release frame 7 to rotate, the cylinder drives the suction and release frame 7 to move downward, the pneumatic suction cup 9 releases the suction, and the plastic preform is placed onto the conveyor belt 10, so that the plastic preforms do not come into contact with each other and are not damaged. At the same time, the plastic preforms dissipate heat during the conveyor belt 10, making them less prone to deformation, ensuring the subsequent blow molding accuracy and efficiency of the plastic preforms, improving quality stability, and facilitating mass production.

[0022] A cooling fan 11 is installed above the conveyor belt 10 to dissipate heat from the plastic preform, so that the plastic preform can be quickly shaped, avoid deformation during storage, improve the subsequent blow molding precision and efficiency, improve quality stability, and facilitate mass production.

[0023] The first driving device includes a first motor 12, the motor shaft of the first motor 12 is connected to a lead screw through a coupling, and the bracket 5 is provided with a nut screwed to the lead screw. The first motor 12 drives the bracket 5 to move back and forth, making the back and forth movement of the bracket 5 more stable.

[0024] The second drive device includes a second motor 13, and a drive wheel 14 is connected to the motor shaft of the second motor 13. The mounting base 6 is hinged to a driven sleeve 16 connected to the suction and discharge frame 7 via a hinge shaft 15. The drive wheel 14 and the driven sleeve 16 are connected in a transmission connection. The second motor 13 drives the rotation of the suction and discharge frame 7, making the rotation of the suction and discharge frame 7 more stable.

[0025] The outer side of the drive wheel 14 is evenly provided with drive teeth, and the outer side of the driven sleeve 16 is evenly provided with driven teeth that mesh with the drive teeth, so that the rotation of the suction and release frame 7 is more stable and the rotation angle is easier to control. In specific implementation, friction wheels can be provided on the outer side of the drive wheel 14 and the driven sleeve 16 for rotation transmission.

[0026] The support frame 4 is provided with a slide rail 17 extending in the front and back, and the bracket 5 is provided with a slider corresponding to the slide rail 17, so that the front and back sliding of the bracket 5 is more stable.

[0027] The bracket 5 is equipped with a mounting bracket for cylinder installation, which facilitates the stable installation of the cylinder.

[0028] The suction and release rack 7 is equipped with a mounting plate 18 for installing the pneumatic suction cup 9, which facilitates the installation of the pneumatic suction cup 9.

[0029] The suction and release rack 7 is provided with a suction and release rack positioning strip 19, and the suction and release positioning hole 8 is located on the inner side of the suction and release rack positioning strip 19. The suction and release rack positioning strip 19 is connected by a connecting rod 20, which makes the structure of the suction and release rack 7 simple and lightweight.

[0030] The suction and release rack 7 is provided with several weight-avoidance openings 21 to reduce the weight of the suction and release rack 7 and facilitate the rotation control of the suction and release rack 7.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plastic preform injection molding machine, characterized in that: The system includes a frame, with a moving mold assembly and a fixed mold assembly mounted at the center of the top of the frame. A support frame is also mounted at the center of the top of the frame, and a bracket that can move back and forth is slidably connected to the support frame. The support frame is equipped with a first drive device that drives the bracket to move back and forth. A cylinder that moves up and down is mounted on the bracket, and a mounting base is connected to the bottom of the cylinder. A suction and release frame is hinged to the mounting base and is positioned above the moving mold assembly and the fixed mold assembly. The mounting base is equipped with a second drive device that drives the suction and release frame to rotate. The suction and release frame has several suction and release positioning holes, and pneumatic suction cups are mounted on the sides of the suction and release positioning holes. A conveyor belt is located on the front side of the frame.

2. The plastic preform injection molding machine according to claim 1, characterized in that: A cooling fan is installed above the conveyor belt.

3. The plastic preform injection molding machine according to claim 1, characterized in that: The first drive device includes a first motor, the motor shaft of the first motor is connected to a lead screw via a coupling, and the bracket is provided with a nut that is screwed to the lead screw.

4. The plastic preform injection molding machine according to claim 1, characterized in that: The second drive device includes a second motor, the motor shaft of the second motor is connected to a drive wheel, the mounting base is hinged to a driven sleeve connected to the suction and discharge frame via a hinge shaft, and the drive wheel is throttle connected to the driven sleeve.

5. The plastic preform injection molding machine according to claim 4, characterized in that: The outer side of the driving wheel is provided with driving teeth, and the outer side of the driven sleeve is provided with driven teeth that mesh with the driving teeth.

6. The plastic preform injection molding machine according to claim 1, characterized in that: The support frame is provided with a slide rail extending in the front and rear directions, and the bracket is provided with a slider corresponding to the slide rail.

7. The plastic preform injection molding machine according to claim 1, characterized in that: The bracket is provided with a mounting bracket for mounting the cylinder.

8. The plastic preform injection molding machine according to claim 1, characterized in that: The suction and release frame is equipped with a mounting plate for mounting the pneumatic suction cup.

9. The plastic preform injection molding machine according to claim 1, characterized in that: The suction and release frame is provided with a suction and release frame positioning strip, and the suction and release positioning hole is located on the inner side of the suction and release frame positioning strip. The suction and release frame positioning strip is connected by a connecting rod.

10. The plastic preform injection molding machine according to claim 1, characterized in that: The suction and discharge frame is equipped with several weight-avoidance openings.

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