A blow molding machine wall thickness adjustment device

Abstract

This utility model discloses a wall thickness adjustment device for a blow molding machine. The device includes a die and a mandrel internally slidably connected to it. A support plate at the top of the die connects to a side frame, and a guide rod and a lead screw are provided between the side frames. The lead screw has two sections with oppositely oriented threads, which threadedly engage with a slider on the guide rod. The slider is hinged to a connecting block at the top of the mandrel via a connecting arm. A motor drives the lead screw to slide and adjust the wall thickness. The bottom of the die has a tapered opening, and the side wall has a feed inlet, which engages with the tapered head at the bottom of the mandrel to assist in material molding. Compared to traditional cylinder and hydraulic drive methods, this device adopts a lead screw-slider transmission structure, which provides smooth transmission, is unaffected by air pressure fluctuations, hydraulic leakage, and component wear, and can precisely control the motor speed and angle to achieve accurate mandrel displacement. This effectively improves the stability and accuracy of wall thickness adjustment, ensuring the quality of plastic products and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing equipment technology, specifically to a blow molding machine wall thickness adjustment device. Background Technology

[0002] In the blow molding process, the uniformity of the wall thickness of plastic products directly affects the product's quality and performance. Currently, most blow molding machine wall thickness adjustment devices on the market use cylinders or hydraulic drives to adjust the mandrel, thereby changing the gap between the mandrel and the die. However, these traditional drive methods have significant drawbacks. On the one hand, cylinder drives are susceptible to air pressure fluctuations, leading to unstable mandrel movement and making it difficult to guarantee wall thickness adjustment accuracy. On the other hand, hydraulic drive systems have complex structures, pose a risk of hydraulic oil leakage, and wear on hydraulic components reduces the stability and reliability of the drive, similarly failing to meet the requirements for high-precision wall thickness adjustment.

[0003] Therefore, it is of great significance to provide a blow molding machine wall thickness adjustment device to solve the problems existing in the prior art. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a blow molding machine wall thickness adjustment device to solve the problems of poor stability and low precision of existing cylinder and hydraulic drive methods.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A blow molding machine wall thickness adjustment device includes a die, a mandrel slidably connected inside the die, a support plate fixedly connected to the top of the die, side frames fixedly connected to both sides of the top of the support plate, a guide rod fixedly connected between the tops of the two side frames, two sliding sleeves slidably connected to the guide rod, sliders fixedly connected to the bottom ends of the two sliding sleeves, a lead screw rotatably connected to the middle of the two side frames, the lead screw including two threaded sections with opposite directions of rotation, the two threaded sections respectively threadedly connected to the two sliders, a connecting block fixedly connected to the top of the mandrel, connecting arms hinged to both sides of the top of the connecting block, the tops of the two connecting arms respectively hinged to the bottom ends of the two sliders.

[0007] Preferably, the bottom end of the die has a tapered opening, and the bottom end of the mandrel has a tapered head that mates with the tapered opening.

[0008] Preferably, the die has a feed port on its side wall, and the feed port is connected to the conical opening.

[0009] Preferably, the guide rod and the lead screw are arranged parallel to each other, a motor is installed on the outer side of the side frame, and the output shaft of the motor is connected to the lead screw for transmission.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. High Stability: This device adopts a screw-slider transmission structure. Screw transmission features smooth transmission and high precision, effectively avoiding mandrel movement vibration caused by air pressure fluctuations or hydraulic system instability. Throughout the transmission process, the threaded engagement between the screw and the slider stably converts the motor's rotational motion into the slider's linear motion. This linear motion, via the connecting arm, drives the mandrel to achieve precise and stable up-and-down sliding, thus ensuring stability during the product wall thickness adjustment process.

[0012] 2. Higher Precision: The precision of lead screw drives primarily depends on the manufacturing precision of the lead screw and its pitch error. Compared to the compressibility of gas in cylinders and the uncontrollable factors arising from the complex structure of hydraulic systems, lead screw drives can achieve more precise displacement control. By precisely controlling the motor's speed and rotation angle, the gap between the mandrel and the die can be accurately adjusted, thereby achieving high-precision adjustment of the product wall thickness. Furthermore, the device's simple and compact structural design reduces the cumulative errors caused by numerous components, further improving the precision of wall thickness adjustment.

[0013] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0014] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a structural diagram of the present invention after adjustment.

[0018] In the diagram: 1. Die; 2. Mandrel; 3. Conical head; 4. Conical opening; 5. Feed inlet; 6. Connecting block; 7. Support plate; 8. Side frame; 9. Connecting arm; 10. Slider; 11. Sliding sleeve; 12. Guide rod; 13. Lead screw; 14. Motor. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0020] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0021] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0022] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0023] Please see Figure 1-2This utility model provides a technical solution for a blow molding machine wall thickness adjustment device: it includes a die 1, a mandrel 2 slidably connected inside the die 1, a support plate 7 fixedly connected to the top of the die 1, side frames 8 fixedly connected to both sides of the top of the support plate 7, a guide rod 12 fixedly connected between the tops of the two side frames 8, two sliding sleeves 11 slidably connected to the guide rod 12, and sliders 10 fixedly connected to the bottom of the two sliding sleeves 11, a lead screw 13 rotatably connected to the middle of the two side frames 8, the lead screw 13 includes two threaded sections with opposite directions of rotation, the two threaded sections are respectively threadedly connected to the two sliders 10, a connecting block 6 fixedly connected to the top of the mandrel 2, connecting arms 9 hinged to both sides of the top of the connecting block 6, and the tops of the two connecting arms 9 are respectively hinged to the bottoms of the two sliders 10.

[0024] The motor 14 drives the lead screw 13 to rotate, and the two screw sections with opposite directions drive the two sliders 10 to move towards or away from each other. Then, through the transmission of the connecting arm 9, the mandrel 2 can slide up and down in the die 1, thereby adjusting the gap between the mandrel 2 and the die 1, and thus adjusting the wall thickness of the product.

[0025] The bottom end of the die 1 is provided with a conical opening 4, and the bottom end of the mandrel 2 is provided with a conical head 3 that matches the conical opening 4.

[0026] A feed port 5 is provided on the side wall of the die 1, and the feed port 5 is connected to the conical opening 4.

[0027] Guide rod 12 and lead screw 13 are arranged parallel to each other. Motor 14 is installed on the outside of side frame 8, and the output shaft of motor 14 is connected to lead screw 13 for transmission.

[0028] In practical use, first install the wall thickness adjustment device of this blow molding machine in the corresponding position of the blow molding machine, and ensure that all parts are firmly connected and that the transmission parts such as motor and lead screw operate flexibly.

[0029] Start the motor 14, which drives the lead screw 13 to rotate. According to the required wall thickness of the product, the speed and direction of rotation of the motor 14 are adjusted by the control system, so that the two threaded sections of the lead screw 13 with opposite directions drive the two sliders 10 to make corresponding movements on the guide rod 12.

[0030] The movement of slider 10 is transmitted to mandrel 2 through connecting arm 9, causing mandrel 2 to slide up and down inside die 1, adjusting the gap between mandrel 2 and die 1 to a suitable position.

[0031] The material enters the die 1 through the feed port 5, flows in the gap between the mandrel 2 and the die 1, and is formed through the conical opening 4 to finally obtain a plastic product with the required wall thickness.

[0032] The above description is merely a preferred embodiment of this utility model and does not limit the scope of protection of this utility model. For those skilled in the art, this utility model can have various modifications and variations. Any changes, modifications, substitutions, integrations, and parameter alterations made to these embodiments within the spirit and principles of this utility model, through conventional substitutions or methods that achieve the same function without departing from the principles and spirit of this utility model, fall within the scope of protection of this utility model.

Claims

1. A blow molding machine wall thickness adjustment device, characterized in that: The device includes a die (1), a mandrel (2) is slidably connected inside the die (1), a support plate (7) is fixedly connected to the top of the die (1), side frames (8) are fixedly connected to both sides of the top of the support plate (7), a guide rod (12) is fixedly connected between the tops of the two side frames (8), two sliding sleeves (11) are slidably connected on the guide rod (12), sliders (10) are fixedly connected to the bottom of the two sliding sleeves (11), a lead screw (13) is rotatably connected to the middle of the two side frames (8), the lead screw (13) includes two threaded sections with opposite directions of rotation, the two threaded sections are respectively threadedly connected to the two sliders (10), a connecting block (6) is fixedly connected to the top of the mandrel (2), connecting arms (9) are hinged to both sides of the top of the connecting block (6), the tops of the two connecting arms (9) are respectively hinged to the bottoms of the two sliders (10).

2. The blow molding machine wall thickness adjustment device according to claim 1, characterized in that: The bottom end of the die (1) is provided with a conical opening (4), and the bottom end of the mandrel (2) is provided with a conical head (3) that cooperates with the conical opening (4).

3. The blow molding machine wall thickness adjustment device according to claim 2, characterized in that: The die (1) has a feed inlet (5) on its side wall, and the feed inlet (5) is connected to the conical opening (4).

4. The blow molding machine wall thickness adjustment device according to claim 1, characterized in that: The guide rod (12) and the lead screw (13) are arranged parallel to each other. A motor (14) is installed on the outside of the side frame (8). The output shaft of the motor (14) is connected to the lead screw (13) for transmission.

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