A method of polishing an injection molding machine screw

Abstract

A kind of injection molding machine screw polishing method, it is related to screw polishing processing technical field, and polishing method includes: the injection molding machine screw to be polished both ends are fixed on polishing device;From the end of feeding section, first round of circulating polishing is carried out to feeding section, compression section and metering section;From the end of feeding section, second round of circulating polishing is carried out to feeding section and compression section;From the end of feeding section, third round of circulating polishing is carried out to feeding section.Compared with prior art, by changing the reciprocating stroke and radial feed amount when polishing tool polishes injection molding machine screw, the feeding section, compression section and metering section of injection molding machine screw can form different degrees of surface roughness to meet the different needs of the feeding section, compression section and metering section of injection molding machine screw to surface roughness;Simplify polishing operation process, only need to polish in the axial direction of injection molding machine screw, reduce the additional functional requirements of polishing device used when polishing, reduce process complexity.

Description

Technical Field

[0001] This invention relates to the field of screw polishing technology, and more specifically to a method for polishing injection molding machine screws. Background Technology

[0002] Polishing is a common processing method used to improve the surface accuracy and smoothness of screws. When the surface accuracy and smoothness of the screw are insufficient, it will affect the performance and life of the screw. Therefore, the surface accuracy and smoothness of the screw are often improved by polishing.

[0003] The injection molding machine screw is one of the core components of the injection molding machine. The surface quality of the screw directly affects the quality of the molded products. Therefore, polishing the screw can improve the quality of the molded products. Polishing reduces the surface roughness of the screw, preventing obstruction of the molten plastic flow during injection, which would result in an uneven surface on the molded product. Polishing also reduces frictional resistance, decreases wear, and extends the screw's service life. The injection molding machine screw mainly consists of three parts: the feeding section, the compression section, and the metering section. The roughness requirements for these three parts are different. For example, to prevent slippage during feeding, the feeding section of the screw must have a certain roughness requirement. The surface roughness requirement for the feeding, compression, and metering sections is that the feeding section has a higher surface roughness than the compression section, and the compression section has a higher surface roughness than the metering section.

[0004] Chinese Patent Application No. 201811273979.4 discloses a screw polishing method. This method uses a rotating mechanism to rotate the screw along its central axis, a oscillating mechanism to repeatedly raise and lower the screw in opposite directions at both ends, and a moving mechanism to move the screw left and right relative to the nozzle of the spraying mechanism, allowing the nozzle to polish the screw surface from all angles. However, this method cannot perform differentiated polishing of the injection molding machine screw and cannot meet the roughness requirements of different parts of the screw. Summary of the Invention

[0005] The present invention aims to overcome the defects in the prior art and provide a polishing method that can perform differentiated polishing on the screw of an injection molding machine to meet the roughness requirements of different parts of the screw.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a method for polishing an injection molding machine screw, wherein the injection molding machine screw includes a feeding section, a compression section, and a metering section connected in sequence, and the polishing method includes the following steps: S1: Fix both ends of the injection molding machine screw to be polished onto the polishing device; S2: Starting from the end of the feeding section, perform the first round of cyclic polishing on the feeding section, compression section and metering section; S3: Starting from the end of the feeding section, perform a second round of cyclic polishing on the feeding section and the compression section; S4: Starting from the end of the feeding section, perform the third round of cyclic polishing on the feeding section.

[0007] As a preferred embodiment of the present invention, the first round of cyclic polishing is from the end of the feeding section to the end of the metering section, and the cycle from the end of the metering section to the end of the feeding section is one cycle.

[0008] As a preferred embodiment of the present invention, the second round of cyclic polishing is defined as a cycle from the end of the feeding section to the junction of the compression section and the metering section, and from the junction of the compression section and the metering section to the end of the feeding section.

[0009] As a preferred embodiment of the present invention, the third round of cyclic polishing is defined as a cycle from the end of the feeding section to the junction of the feeding section and the compression section, and from the junction of the feeding section and the compression section to the end of the feeding section.

[0010] As a preferred embodiment of the present invention, step S2 includes the following steps: measuring the roughness of the metering section after polishing; if the roughness does not meet the requirements, then starting from the end of the feeding section, performing the first round of cyclic polishing again until the roughness meets the requirements.

[0011] As a preferred embodiment of the present invention, step S3 includes the following steps: measuring the roughness of the compression section after polishing; if the roughness of the compression section is less than or equal to the roughness of the metering section, then starting from the end of the feeding section, a second round of cyclic polishing is performed until the roughness of the compression section is greater than the roughness of the metering section.

[0012] As a preferred embodiment of the present invention, step S4 includes the following steps: measuring the roughness of the feeding section after polishing; if the roughness of the feeding section is less than or equal to the roughness of the compression section, then starting from the end of the feeding section, a third round of cyclic polishing is performed until the roughness of the feeding section is greater than the roughness of the compression section.

[0013] As a preferred embodiment of the present invention, the polishing device includes a guide rail, a fixing platform arranged at both ends of the guide rail for fixing the injection molding machine screw, and a polishing tool arranged on the guide rail for polishing the injection molding machine screw.

[0014] In a preferred embodiment of the present invention, the radial feed of the polishing tool during the first round of polishing is less than the radial feed of the polishing tool during the second round of polishing, and the radial feed of the polishing tool during the second round of polishing is less than the radial feed of the polishing tool during the third round of polishing.

[0015] In a preferred embodiment of the present invention, the axial feed speed of the polishing tool during the first round of polishing is less than that during the second round of polishing, and the axial feed speed of the polishing tool during the second round of polishing is less than that during the third round of polishing.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. By changing the reciprocating stroke and radial feed amount when polishing the injection molding machine screw with polishing tools, the feeding section, compression section and metering section of the injection molding machine screw can form different degrees of surface roughness to meet the different surface roughness requirements of the feeding section, compression section and metering section of the injection molding machine screw. 2. Simplify the polishing process by polishing only the screw of the injection molding machine in the axial direction, reducing the additional functional requirements of the polishing equipment and decreasing the complexity of the process. Attached Figure Description

[0017] Figure 1 A flowchart illustrating an injection molding machine screw polishing method provided in this application embodiment; Figure 2 This is a schematic diagram of the structure of an injection molding machine screw provided in an embodiment of this application; Figure 3 A schematic flowchart illustrating a method for polishing an injection molding machine screw, provided as an embodiment of this application; Figure 4 This is a schematic diagram of the polishing apparatus provided in the embodiments of this application; Reference numerals: injection molding machine screw 100, feeding section 110, compression section 120, metering section 130, polishing device 200, guide rail table 210, fixed table 220, polishing tool 230. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0019] Please see Figure 1 , Figure 1 This document presents an overall flowchart of a method for polishing an injection molding machine screw according to an embodiment of this application.

[0020] like Figure 1 and Figure 2 As shown, a method for polishing an injection molding machine screw is disclosed. The injection molding machine screw 100 includes a feeding section 110, a compression section 120, and a metering section 130 connected in sequence. The polishing method includes the following steps: S1: Fix both ends of the injection molding machine screw 100 to be polished onto the polishing device 200; S2: Starting from the end of the feeding section 110, perform the first round of cyclic polishing on the feeding section 110, the compression section 120 and the metering section 130; S3: Starting from the end of the feeding section 110, perform a second round of cyclic polishing on the feeding section 110 and the compression section 120; S4: Starting from the end of the feeding section 110, perform the third round of cyclic polishing on the feeding section 110.

[0021] Specifically, the first round of cyclic polishing polishes the feeding section 110, compression section 120, and metering section 130 of the injection molding machine screw 100, so that the roughness of the feeding section 110, compression section 120, and metering section 130 of the injection molding machine screw 100 is within a similar roughness range; the second round of cyclic polishing polishes the feeding section 110 and compression section 120 of the injection molding machine screw 100, so that the roughness of the feeding section 110 and compression section 120 is changed, and the roughness of the feeding section 110 after the second round of cyclic polishing is improved. The roughness of the feeding section 110 and the compression section 120 are within a similar roughness range, and the roughness of the feeding section 110 and the compression section 120 after the second round of cyclic polishing is greater than the roughness of the metering section 130 after the first round of cyclic polishing; the third round of cyclic polishing is to polish the feeding section 110 of the injection molding machine screw 100 to change the roughness of the feeding section 110, so that the roughness of the feeding section 110 after the third round of cyclic polishing is greater than the roughness of the compression section 120 after the second round of cyclic polishing.

[0022] As an optional embodiment of this application, the first round of cyclic polishing consists of a cycle from the end of the feeding section 110 to the end of the metering section 130, and a cycle from the end of the metering section 130 to the end of the feeding section 110.

[0023] See here. Figure 3 The diagram shown is a flowchart illustrating a method for polishing an injection molding machine screw according to an embodiment of this application; as shown... Figure 3 As shown, specifically, the first round of cyclic polishing includes one or more cycles. The first round of cyclic polishing takes the end of the feeding section 110 away from the metering section 130 as the polishing start point and polishing end point of the cycle process, and takes the end of the metering section 130 away from the feeding section 110 as the polishing reciprocating point of the cycle process. The number of cycles depends on the actual processing conditions.

[0024] Furthermore, the first round of cyclic polishing mainly ensures the roughness of the metering section 130, while also pre-polishing the feeding section 110 and the compression section 120 for the subsequent second round of cyclic polishing.

[0025] As an optional embodiment of this application, the second round of cyclic polishing is defined as a cycle from the end of the feeding section 110 to the junction of the compression section 120 and the metering section 130, and from the junction of the compression section 120 and the metering section 130 to the end of the feeding section 110.

[0026] See here. Figure 3The diagram shown is a flowchart illustrating a method for polishing an injection molding machine screw according to an embodiment of this application; as shown... Figure 3 As shown, specifically, the second round of cyclic polishing includes one or more cycles. The second round of cyclic polishing takes the end of the feeding section 110 away from the metering section 130 as the polishing start and end point of the cycle process. One reciprocating polishing operation on the feeding section 110 and the compression section 120 is considered as completing one cycle. The number of cycles depends on the actual processing situation.

[0027] Furthermore, the second round of cyclic polishing mainly ensures the roughness of the compression section 120, while also pre-polishing the feeding section 110 part for the subsequent third round of cyclic polishing.

[0028] In one optional embodiment of the text application, the third round of cyclic polishing is defined as a cycle from the end of the feeding section 110 to the junction of the feeding section 110 and the compression section 120, and from the junction of the feeding section 110 and the compression section 120 to the end of the feeding section 110.

[0029] See here. Figure 3 The diagram shown is a flowchart illustrating a method for polishing an injection molding machine screw according to an embodiment of this application; as shown... Figure 3 As shown, specifically, the third round of cyclic polishing includes one or more cycles. The end of the feeding section 110 away from the metering section 130 is used as the starting point and ending point of the cyclic polishing process. One reciprocating polishing operation on the feeding section 110 is considered as completing one cycle. The number of cycles depends on the actual processing situation.

[0030] Furthermore, the third round of cyclic polishing primarily ensures the surface roughness of the feeding section 110.

[0031] As an optional embodiment of this application, step S2 includes the following steps: measuring the roughness of the metering section 130 after polishing; if the roughness does not meet the requirements, then starting from the end of the feeding section 110, perform the first round of cyclic polishing again until the roughness meets the requirements.

[0032] Specifically, during the first round of polishing, the parameters of the polishing device 200 are generally preset based on theoretical conditions. Therefore, the theoretical surface roughness of the metering section 130 on the injection molding machine screw 100 after the first polishing is usually different from the actual surface roughness. After the first polishing is completed, the roughness of the metering section 130 is measured, and the parameters of the polishing device 200 are adjusted according to the actual surface roughness so that the surface roughness of the metering section 130 reaches the ideal state.

[0033] As an optional embodiment of this application, step S3 includes the following steps: measuring the roughness of the polished compression section 120; if the roughness of the compression section 120 is less than or equal to the roughness of the metering section 130, then starting from the end of the feeding section 110, a second round of cyclic polishing is performed until the roughness of the compression section 120 is greater than the roughness of the metering section 130.

[0034] Specifically, during the first polishing in the second round of cyclic polishing, the parameters of the polishing device 200 are generally preset based on theoretical conditions. Therefore, the theoretical surface roughness of the compression section 120 on the injection molding machine screw 100 after the first polishing usually differs from the actual surface roughness. After the first polishing is completed, the roughness of the compression section 120 is measured, and the parameters of the polishing device 200 are adjusted according to the actual surface roughness so that the surface roughness of the compression section 120 reaches the ideal state.

[0035] As an optional embodiment of this application, step S4 includes the following steps: measuring the roughness of the feeding section 110 after polishing; if the roughness of the feeding section 110 is less than or equal to the roughness of the compression section 120, then starting from the end of the feeding section 110, a third round of cyclic polishing is performed until the roughness of the feeding section 110 is greater than the roughness of the compression section 120.

[0036] Specifically, during the first polishing in the third round of cyclic polishing, the parameters of the polishing device 200 are generally preset based on theoretical conditions. Therefore, the theoretical surface roughness of the feeding section 110 on the injection molding machine screw 100 after the first polishing is usually different from the actual surface roughness. After the first polishing is completed, the roughness of the feeding section 110 is measured, and the parameters of the polishing device 200 are adjusted according to the actual surface roughness so that the surface roughness of the feeding section 110 reaches the ideal state.

[0037] As an optional embodiment of this application, the polishing device 200 includes a guide rail 210, a fixing platform 220 arranged at both ends of the guide rail 210 for fixing the injection molding machine screw 100, and a polishing tool 230 arranged on the guide rail 210 for polishing the injection molding machine screw 100.

[0038] See here. Figure 4 The diagram shown is a structural schematic of the polishing apparatus provided in the embodiments of this application; as shown Figure 4As shown, specifically, the fixed platform 220 located on the left side of the guide rail 210 is immovably arranged on the guide rail 210, while the fixed platform 220 located on the right side of the guide rail 210 can move along the length of the guide rail 210, which facilitates fixing injection molding machine screws 100 of different lengths onto the polishing device 200, so that the polishing device 200 can polish injection molding machine screws 100 of different lengths; the polishing tool 230 is located between the two fixed platforms 220, and the fixed platforms 220, the injection molding machine screws 100 fixed on the fixed platforms 220 and the polishing tool 200 are located on the same axis.

[0039] As an optional embodiment of this application, the radial feed of the polishing tool 230 during the first round of polishing is less than the radial feed of the polishing tool 230 during the second round of polishing, and the radial feed of the polishing tool 230 during the second round of polishing is less than the radial feed of the polishing tool 230 during the third round of polishing.

[0040] Specifically, during the polishing of the injection molding machine screw, the surface roughness is positively correlated with the radial feed rate of the polishing tool 230. The formula for surface roughness is: ,in, For surface roughness, This refers to the radial feed rate of the polishing tool. The radius of the polishing tool tip is denoted as _ ...

[0041] As an optional embodiment of this application, the axial feed speed of the polishing tool 230 during the first round of polishing is less than the axial feed speed of the polishing tool 230 during the second round of polishing, and the axial feed speed of the polishing tool 230 during the second round of polishing is less than the axial feed speed of the polishing tool 230 during the third round of polishing.

[0042] Specifically, when the polishing tool 230 polishes the injection molding machine screw 100, the faster the axial feed speed of the polishing tool 230, the shorter the polishing time on the surface of the injection molding machine screw 100; the slower the axial feed speed of the polishing tool 230, the longer the polishing time on the surface of the injection molding machine screw 100. At the same time, the longer the polishing time, the better the surface finish and the lower the surface roughness of the injection molding machine screw 100. Therefore, the surface roughness of the injection molding machine screw 100 after polishing can be changed by appropriately adjusting the axial feed speed of the polishing tool 230.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0044] Although this document frequently uses reference numerals from the figures, such as injection molding machine screw 100, feeding section 110, compression section 120, metering section 130, polishing device 200, guide table 210, fixed table 220, and polishing tool 230, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A method for polishing an injection molding machine screw, wherein the injection molding machine screw (100) comprises a feeding section (110), a compression section (120), and a metering section (130) connected in sequence, characterized in that, Includes the following steps: S1: Fix both ends of the injection molding machine screw (100) to be polished onto the polishing device (200); S2: Starting from the end of the feeding section (110), the feeding section (110), the compression section (120) and the metering section (130) are polished in the first round of cycles; S3: Starting from the end of the feeding section (110), perform a second round of cyclic polishing on the feeding section (110) and the compression section (120); S4: Starting from the end of the feeding section (110), perform the third round of cyclic polishing on the feeding section (110); The first round of cyclic polishing consists of a cycle from the end of the feeding section (110) to the end of the metering section (130) and a cycle from the end of the metering section (130) to the end of the feeding section (110); the second round of cyclic polishing consists of a cycle from the end of the feeding section (110) to the junction of the compression section (120) and the metering section (130) and a cycle from the junction of the compression section (120) and the metering section (130) to the end of the feeding section (110); the third round of cyclic polishing consists of a cycle from the end of the feeding section (110) to the junction of the feeding section (110) and the compression section (120) and a cycle from the junction of the feeding section (110) and the compression section (120) to the end of the feeding section (110). Step S2 includes the following steps: Measure the roughness of the metering section (130) after polishing. If the roughness does not meet the requirements, start the first round of cyclic polishing again from the end of the feeding section (110) until the roughness meets the requirements. Step S3 includes the following steps: Measure the roughness of the compression section (120) after polishing. If the roughness of the compression section (120) is less than or equal to the roughness of the metering section (130), then start the second round of cyclic polishing from the end of the feeding section (110) until the roughness of the compression section (120) is greater than the roughness of the metering section (130). Step S4 includes the following steps: After polishing, measure the roughness of the feeding section (110). If the roughness of the feeding section (110) is less than or equal to the roughness of the compression section (120), then start the third round of cyclic polishing from the end of the feeding section (110) until the roughness of the feeding section (110) is greater than the roughness of the compression section (120).

2. The method for polishing an injection molding machine screw according to claim 1, characterized in that, The polishing device (200) includes a guide rail (210), a fixing platform (220) arranged at both ends of the guide rail (210) for fixing the injection molding machine screw (100), and a polishing tool (230) arranged on the guide rail (210) for polishing the injection molding machine screw (100).

3. The method for polishing an injection molding machine screw according to claim 2, characterized in that, During the first round of polishing, the radial feed of the polishing tool (230) is less than that during the second round of polishing, and the radial feed of the polishing tool (230) during the second round of polishing is less than that during the third round of polishing.

4. The method for polishing an injection molding machine screw according to claim 2, characterized in that, During the first round of polishing, the axial feed speed of the polishing tool (230) is less than that during the second round of polishing, and the axial feed speed of the polishing tool (230) during the second round of polishing is less than that during the third round of polishing.

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