A thermal expansion elimination system for an extruder and a method thereof

Abstract

The present invention discloses a thermal expansion elimination system for an extruder and a method for eliminating the same. The system is composed of a plurality of thermal expansion elimination units, each of which is composed of a movable ball seat and a locking mechanism. The movable ball seat supports the extruder. After the extruder generates thermal expansion during heating or cooling, the movable ball seat can freely move the extruder body according to the force conditions, thereby protecting the core components of the body from being damaged by extrusion due to the inability to release the thermal expansion. When the extruder is in a working state, the locking mechanism locks and fixes the extruder, and the friction between the locking support plate and the inverted L-shaped fixed plate in the first fixed seat is used to prevent production fluctuations caused by the movement of the body during production, thereby ensuring the pressure stability during the extrusion of the material, thereby avoiding quality problems in the product. The above-mentioned system is adopted in the method, and the elimination system has the advantages of simple structure, reasonable design, and easy use.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary equipment for extruders, and in particular to a thermal expansion elimination system for an extruder and a method thereof. Background Art

[0002] Extruder is a type of plastic machinery. The most common extruder is the screw extruder. The screw extruder relies on the pressure and shear force generated by the rotation of the screw to fully plasticize and evenly mix the material and form it through the die.

[0003] The extruder needs to heat the material when performing extrusion molding. During the heating process, as the temperature rises, some parts of the extruder will be deformed due to the heat. If the extruder is simply limited in position, the thermal expansion of the body cannot be released, causing some parts to be damaged by extrusion, affecting the service life. If the extruder is not limited in order to protect the components in the extruder, the extruder will easily shake and become unstable during the extrusion operation, affecting the extrusion quality.

[0004] Therefore, how to eliminate the influence of thermal expansion of the extruder has become an urgent problem to be solved. Summary of the Invention

[0005] In view of this, the present invention provides a thermal expansion elimination system for an extruder and a method thereof to solve the problems existing in the background technology.

[0006] In one aspect, the present invention provides a thermal expansion elimination system for an extruder, comprising: a plurality of thermal expansion elimination units symmetrically arranged along two sides of the extruder, each of the thermal expansion elimination units comprising: a movable ball seat and a locking mechanism;

[0007] The movable ball seat is used to support the extruder and is fixedly connected to the base of the extruder. When the extruder undergoes thermal expansion during heating or cooling, the movable ball seat can move freely according to the force applied to the extruder.

[0008] The locking mechanism includes: a first fixing seat, a fixing bracket, a cylinder and a locking support plate;

[0009] The first fixing seat includes: a bottom plate and an inverted L-shaped fixing plate;

[0010] The base plate is fixedly connected to the embedded parts in the ground;

[0011] The inverted L-shaped fixing plate is composed of a supporting plate and a cover plate connected in one piece, and the lower end of the supporting plate is fixedly welded to the bottom plate;

[0012] The fixed bracket is fixedly welded to the side wall of the base of the extruder;

[0013] The bottom surface of the cylinder is fixedly connected to the fixing bracket;

[0014] The locking support plate is vertically fixedly connected to the telescopic rod of the cylinder. When the telescopic rod in the cylinder is retracted relative to the cylinder body to a locked position, the locking support plate abuts against the lower surface of the cover plate in the inverted L-shaped fixing plate.

[0015] Preferably, the movable ball seat comprises: a ball bearing and a second fixed seat;

[0016] The lower end of the ball bearing is connected to the ground and can roll freely on the ground.

[0017] The second fixing seat is sleeved on the outside of the ball bearing, and the upper part of the second fixing seat is fixedly connected to the side wall of the base of the extruder.

[0018] Further preferably, an adjusting bolt is provided on the upper surface of one end of the locking support plate close to the inverted L-shaped fixing plate.

[0019] On the other hand, the present invention also provides a method for eliminating thermal expansion for an extruder, which is applicable to the above-mentioned thermal expansion elimination system, and the method is specifically:

[0020] When the extruder is heated or cooled, the extruder is controlled to be in an unlocked free-moving state and supported by the movable ball seat, and the extruder moves freely according to the force of thermal expansion;

[0021] When the extruder starts to work and the screw speed reaches a preset value, the extruder is locked in position to restrict the movement of the extruder.

[0022] The present invention provides a thermal expansion elimination system for an extruder, which is composed of a plurality of thermal expansion elimination units, each of which is composed of a movable ball seat and a locking mechanism. The movable ball seat supports the extruder, and after the extruder generates thermal expansion during heating or cooling, the movable ball seat can freely move the extruder body according to the stress conditions, thereby protecting the core components of the body from being damaged by extrusion due to the inability to release the thermal expansion. When the extruder is in a working state, the locking mechanism locks and fixes the extruder, and the friction between the locking support plate and the inverted L-shaped fixed plate in the first fixed seat is used to prevent production fluctuations caused by movement of the body during production, thereby ensuring pressure stability during material extrusion, and thus avoiding quality problems in the product. Through the arrangement of the above-mentioned thermal expansion elimination system, the problem of movement of the body caused by thermal expansion of the extruder heating can be effectively solved, and the problem of body movement caused by factors such as the rotation of the equipment screw and the rotation of the main machine during normal production of the extruder can be avoided.

[0023] The thermal expansion elimination system for an extruder provided by the present invention has the advantages of simple structure, reasonable design, easy use, and the like.

[0024] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 A schematic diagram of the composition structure of a thermal expansion elimination system for an extruder provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0029] In order to effectively solve the influence of thermal expansion factors on the operation of the extruder, this embodiment provides a thermal expansion elimination system for the extruder, which includes multiple thermal expansion elimination units, and the multiple thermal expansion elimination units are symmetrically arranged along both sides of the extruder, see Figure 1 Each thermal expansion elimination unit is composed of a movable ball seat 1 and a locking mechanism 2. The movable ball seat 1 is used to support the extruder and is fixedly connected to the base A of the extruder. When the extruder undergoes thermal expansion during heating or cooling, the movable ball seat 1 can move freely according to the force conditions of the extruder, protecting the core components of the extruder from being damaged by extrusion due to the inability to release due to thermal expansion.

[0030] See also Figure 1The locking mechanism 2 is mainly composed of a first fixed seat 21, a fixed bracket 22, a cylinder 23 and a locking support plate 24, wherein the first fixed seat 21 is composed of a base plate 211 and an inverted L-shaped fixed plate 212, wherein the base plate 211 is fixedly connected to the embedded parts in the ground, and the inverted L-shaped fixed plate 212 is composed of an integrally connected support plate and a cover plate, the lower end of the support plate is fixedly welded to the base plate 211, the cover plate is vertically arranged relative to the support plate, and the end of the cover plate is integrally connected to the upper end of the support plate, the fixed bracket 22 is fixedly welded to the side wall of the base of the extruder, the bottom surface of the cylinder 23 is fixedly connected to the fixed bracket 22, and the locking support plate 24 is vertically fixedly connected to the telescopic rod of the cylinder 23. When the telescopic rod in the cylinder 23 is retracted relative to the cylinder body to the locked position, the locking support plate 24 is against the lower surface of the cover plate in the inverted L-shaped fixed plate 212.

[0031] The thermal expansion elimination system provided in the above embodiment needs to meet two requirements at the same time: on the one hand, when the extruder undergoes thermal expansion, the extruder can be adaptively moved to release the thermal expansion and protect the core components of the extruder; on the other hand, when the extruder is working, the position of the extruder can be locked to prevent production fluctuations caused by the movement of the machine body during production, so as to ensure the pressure stability during the material extrusion process.

[0032] In order to meet the above two requirements, the specific working process of the above thermal expansion elimination system is as follows:

[0033] When the extruder is in a non-operating state of heating or cooling, the locking mechanism is in an unlocked state, and the extruder as a whole is supported by the movable ball seat. When the extruder generates thermal expansion during the heating or cooling process, the movable ball seat moves freely on the ground according to the force conditions, so as to realize the self-adaptation of the thermal expansion of the extruder and protect the core components of the extruder from being squeezed and damaged due to the inability to release due to thermal expansion;

[0034] When the extruder starts to work, the bottom end of the cylinder is fixedly connected to the side wall of the extruder base through the fixed bracket. Therefore, the position of the cylinder relative to the base of the extruder is fixed. When the telescopic rod contracts, it will drive the locking support plate to move upward until the locking support plate is against the inverted L-shaped fixing plate in the first fixing seat, and the first fixing seat is fixedly connected to the ground. Therefore, the base of the extruder can be locked by the friction between the locking support plate and the inverted L-shaped fixing plate in the first fixing seat. Since the thermal expansion elimination units are symmetrically arranged on both sides of the extruder, balance during use can be ensured.

[0035] The above-mentioned thermal expansion elimination system has the following advantages:

[0036] 1) Under non-working conditions, the extruder needs to move freely within a certain range; under working conditions, its position needs to be locked to prevent movement. The above-mentioned thermal expansion elimination system can realize automatic control of this function without manual operation. It is fast and efficient, flexible to adjust, and the stable equipment can ensure high-quality output products.

[0037] 2) The locking mechanism in the above-mentioned thermal expansion elimination system relies on the friction generated by compression to limit the movement of the device. When subjected to a large external force (such as overload), the device can overcome the friction and produce a small movement, thereby protecting the core part of the body from damage caused by squeezing.

[0038] See also Figure 1 The above-mentioned movable ball seat 1 is composed of a ball bearing 11 and a second fixed seat 12, wherein the lower end of the ball bearing 11 is connected to the ground and can roll freely on the ground. The second fixed seat 12 is mounted on the outside of the ball bearing 11, and the upper part of the second fixed seat 12 is fixedly connected to the side wall of the base of the extruder.

[0039] As an improvement to the technical solution, an adjusting bolt 241 is provided on the upper surface of one end of the locking support plate 24 close to the inverted L-shaped fixing plate 212 to adjust the compensation gap.

[0040] This embodiment provides a specific method for eliminating thermal expansion using the above-mentioned thermal expansion elimination system for an extruder, specifically:

[0041] When the extruder is heated or cooled, the extruder is controlled to be in an unlocked free-moving state and supported by the movable ball seat 1, and the extruder moves freely according to the force of thermal expansion;

[0042] When the extruder starts to work and the screw speed reaches a preset value, the extruder is locked in position to restrict the movement of the extruder.

[0043] In actual use, the preset value of the screw speed is usually set to 10 rpm.

[0044] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0045] It should be understood that the present invention is not limited to the above description and that various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A thermal expansion elimination system for an extruder, characterized in that: include: A plurality of thermal expansion elimination units are symmetrically arranged along both sides of the extruder, each of the thermal expansion elimination units comprising: a movable ball seat (1) and a locking mechanism (2); The movable ball seat (1) is used to support the extruder and is fixedly connected to the base of the extruder. When the extruder undergoes thermal expansion during heating or cooling, the movable ball seat (1) can move freely according to the stress conditions of the extruder. The locking mechanism (2) comprises: a first fixing seat (21), a fixing bracket (22), a cylinder (23) and a locking support plate (24); The first fixing seat (21) comprises: a bottom plate (211) and an inverted L-shaped fixing plate (212); The bottom plate (211) is fixedly connected to the embedded parts in the ground; The inverted L-shaped fixing plate (212) is composed of a supporting plate and a cover plate connected in one piece, and the lower end of the supporting plate is fixedly welded to the bottom plate (211); The fixed bracket (22) is fixedly welded to the side wall of the base of the extruder; The bottom surface of the cylinder (23) is fixedly connected to the fixing bracket (22); The locking support plate (24) is vertically fixedly connected to the telescopic rod of the cylinder (23); when the telescopic rod in the cylinder (23) is retracted relative to the cylinder body to a locked position, the locking support plate (24) abuts against the lower surface of the cover plate in the inverted L-shaped fixing plate (212).

2. The thermal expansion elimination system for an extruder according to claim 1, characterized in that: The movable ball seat (1) comprises: a ball bearing (11) and a second fixed seat (12); The lower end of the ball bearing (11) is in contact with the ground and can roll freely on the ground; The second fixing seat (12) is sleeved on the outside of the ball bearing (11), and the upper part of the second fixing seat (12) is fixedly connected to the side wall of the base of the extruder.

3. The thermal expansion elimination system for an extruder according to claim 1, characterized in that: An adjusting bolt (241) is provided on the upper surface of one end of the locking support plate (24) close to the inverted L-shaped fixing plate (212).

4. A method for eliminating thermal expansion of an extruder, applicable to the thermal expansion elimination system according to any one of claims 1 to 3, characterized in that: The method is specifically as follows: When the extruder is heated or cooled, the extruder is controlled to be in an unlocked free-moving state and supported by a movable ball seat (1), and the extruder moves freely according to the stress of thermal expansion; When the extruder starts to work and the screw speed reaches a preset value, the extruder is locked in position to restrict the movement of the extruder.

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