Metal seamless gas cylinder blank machining expansion sleeve equipment and using method

Abstract

The invention discloses a metal seamless gas cylinder blank machining expansion sleeve device which is assembled on an installation structure of a numerical control machine tool and comprises a mandrel, a mandrel pull rod, an ejector rod, an expansion jacking sliding block, a guide positioning head and an expansion jacking sleeve, the mandrel pull rod is inserted into the mandrel, and a conical groove is formed in the outer surface of a thick shaft; a conical groove is formed in the outer surface of the mandrel, a sliding groove corresponding to the conical groove is annularly formed in the outer surface of the mandrel, the expanding and jacking sliding block is inserted into the sliding groove, the guide positioning head is fixedly installed at the outer end of the mandrel, and the expanding and jacking sleeve is assembled on the outer surface of the mandrel in a connected mode. According to the invention, the expanding and jacking sleeve is used for expanding and fixing the bottle preform from inside to outside in the bottle preform, the mode that a traditional clamp is used for clamping the mouth of the bottle preform is replaced, the risk that the mouth of the bottle preform is deformed due to clamping by the clamp is avoided, and compared with the mode that the traditional clamp and the expanding sleeve are used for fixing, the coaxiality is better, so that the wall thickness difference after the outer circle of the bottle preform is processed is more uniform; and the product quality and consistency are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of metal seamless gas cylinder container manufacturing, and in particular provides a metal seamless gas cylinder preform processing expansion sleeve equipment and a use method. Background Art

[0002] In recent years, with the increasing national standards for environmental protection, safety and fire protection and the continuous increase in investment, the market demand for pressure vessels and gas cylinders has increased significantly. In the process of producing metal inner shells of pressure vessels, the aluminum ingot is first extruded into a cup shape, then processed into a long thin-walled thick cup through spinning technology, and finally completed through the closing process. In this series of processes, the uniformity of wall thickness after extrusion and before spinning and the condition of the outer surface of the bottle embryo are particularly critical, which will directly affect the uniformity of wall thickness difference and surface finish of the finished product. Therefore, before spinning, it is necessary to use a CNC lathe to turn the semi-finished bottle embryo. Traditionally, the outer circle turning process adopts a fixture fixing method, but this method is easy to cause deformation of the cup mouth of the barrel blank, and the coaxiality of manual correction is poor, and it will also cause waste of labor hours. In order to solve these problems, avoid fixture deformation and correction problems, and further improve production efficiency and product consistency, we designed a metal seamless gas cylinder bottle embryo processing expansion sleeve equipment and use method. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a metal seamless gas cylinder preform processing expansion sleeve equipment and a use method.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a metal seamless gas cylinder preform processing expansion sleeve equipment, which is assembled on the mounting structure of a CNC machine tool, and comprises a mandrel, a mandrel pull rod, a push rod, an expansion top slider, a guide positioning head and an expansion top sleeve, wherein the mandrel pull rod is inserted into the mandrel, and the mandrel pull rod is composed of a thin shaft and a thick shaft, the outer end of the thin shaft is provided with a threaded hole, and one end of the push rod is screwed into the threaded hole, and the other end of the push rod contacts the output end of the cylinder in the CNC machine tool, the outer surface of the thick shaft is provided with a tapered groove, the outer surface of the mandrel is annularly provided with a slide groove corresponding to the tapered groove, and the expansion top slider is inserted into the slide groove, the inner end of the expansion top slider is an inclined arc surface matching the inner surface of the tapered groove, the guide positioning head is fixedly installed on the outer end of the mandrel, the expansion top sleeve is sleeved and assembled on the outer surface of the mandrel, and the outer surface of the expansion top sleeve is staggered with empty grooves.

[0005] Furthermore, an annular protrusion is integrally formed on the outer surface of the core shaft, the diameter of the guide positioning head is the same as the diameter of the annular protrusion and the outer diameter of the expansion sleeve, and the expansion sleeve is located between the annular protrusion and the guide positioning head.

[0006] Furthermore, a pin hole is formed on the outer surface of the core shaft, a positioning hole corresponding to the pin hole is formed on the outer surface of the expansion sleeve, and a positioning pin is inserted into the positioning hole and the pin hole.

[0007] Furthermore, there are six empty slots in total, and the positioning holes are located between adjacent empty slots. When the positioning holes are aligned with the pin holes, the sliding slots are located between adjacent empty slots.

[0008] Furthermore, an adjusting nut is threaded on the outer surface of the push rod, and a disc spring is sleeved on the outer surface of the push rod. The large diameter end of the disc spring faces the core shaft, and the disc spring and the core shaft are located on both sides of the installation structure of the CNC machine tool.

[0009] Furthermore, there are three disc springs in total, and the installation directions of the three disc springs are the same.

[0010] Furthermore, an inner cavity is formed at the outer end of the core shaft, a circular hole connected to the inner cavity is formed at the inner end of the core shaft, and the diameter of the circular hole is smaller than the diameter of the inner cavity, the thin shaft of the core shaft pull rod is located in the circular hole, and the thick shaft is located in the inner cavity, and the length of the inner cavity is greater than the length of the thick shaft.

[0011] Furthermore, a limiting slide groove is provided in the circular hole of the core shaft, a limiting block is integrally formed on the outer surface of the thin shaft of the core shaft pull rod, and the limiting block is inserted into the limiting slide groove.

[0012] A method for using a metal seamless gas cylinder preform expansion device, using the above-mentioned metal seamless gas cylinder preform expansion device, comprising the following steps: Step 1: Assemble the expansion sleeve equipment. First, insert the mandrel pull rod into the inner cavity of the mandrel, then place multiple expansion sliders into the slide grooves respectively, and then put the expansion sleeve on the outer side of the mandrel. After aligning the positioning hole with the pin hole, insert the positioning pin to complete the positioning of the expansion sleeve. Finally, fix the guide positioning head at the outer end of the mandrel by bolts to obtain the main body of the expansion sleeve equipment. Step 2: Install the expansion set equipment on the CNC machine tool, place the main body of the expansion set equipment on the outside of the mounting structure of the CNC machine tool, place the push rod with the adjusting nut screwed on and the disc spring on the inside of the mounting structure of the CNC machine tool, and then screw one end of the push rod into the threaded hole of the mandrel pull rod until the disc spring contacts and compresses the mounting structure of the CNC machine tool, and the other end of the push rod corresponds to the output end of the cylinder; Step 3: Install the preform, operate the cylinder, make the output end of the cylinder contact the ejector rod and push it, so that the mandrel pull rod moves toward the side of the guide positioning head. At the same time, the disc spring is compressed, so that the conical groove of the mandrel pull rod does not produce thrust on the top expansion slider. At this time, the top expansion sleeve is in the initial state. Put the preform on the expansion sleeve equipment from the guide positioning head, so that the guide positioning head contacts the bottom of the preform; Step 4: Fix the preform and operate the cylinder to move the output end of the cylinder away from the ejector rod. Under the elastic force of the disc spring, the ejector rod and the mandrel pull rod are driven to move away from the guide positioning head. Under the action of the conical groove, the expansion slider is driven to move outward, contact and squeeze the expansion sleeve to deform and expand it, thereby fixing the preform from the inside. Step 5: Processing the outer circle of the bottle embryo, controlling the CNC machine tool to perform outer circle processing on the bottle embryo; Step 6: Material removal: After the outer circle of the preform is processed, the cylinder is operated again to make the output end of the cylinder contact the ejector rod and push it, so that the top expansion slider falls back into the conical groove, and the top expansion sleeve is reset, the preform is released, and the material removal can be carried out; Step 7: Repeat steps 3 to 6 to complete the outer circle processing of multiple preforms.

[0013] The beneficial effects of using the present invention are: The present invention uses an expansion sleeve to fix the bottle preform from the inside to the outside, replacing the traditional clamping method of the bottle preform cup mouth, avoiding the risk of the clamp deforming the bottle preform mouth. Compared with the traditional clamp, the expansion sleeve fixing method has better coaxiality, so that the wall thickness difference after the outer circle of the bottle preform is processed is more uniform, thereby improving product quality and consistency.

[0014] This expansion sleeve equipment does not need to be calibrated during use, and can be directly put on the bottle embryo. Compared with the traditional operation method, it saves calibration time. At the same time, the expansion sleeve equipment is easy to install, easy to repair and replace, and the processing operation is simple, which effectively improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0016] Figure 2 This is a three-dimensional schematic diagram of the present invention after the bottle embryo is installed.

[0017] Figure 3 It is an exploded view of the three-dimensional structure of the present invention.

[0018] Figure 4 It is a front cross-sectional view of the present invention.

[0019] Reference numerals include: 1. Mandrel, 11. Slide, 12. Annular protrusion, 13. Pin hole, 14. Inner cavity, 15. Limiting slide, 2. Mandrel pull rod, 21. Conical groove, 22. Limiting block, 3. Ejector rod, 4. Expanding slider, 5. Guide positioning head, 6. Expanding sleeve, 61. Empty groove, 62. Positioning hole, 7. Adjusting nut, 8. Disc spring, 9. Bottle embryo. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1

[0022] Reference Figures 1 to 4 , a metal seamless gas cylinder preform processing expansion sleeve equipment, assembled on the mounting structure of a CNC machine tool, includes a mandrel 1, a mandrel pull rod 2, a push rod 3, an expansion top slider 4, a guide positioning head 5 and an expansion top sleeve 6, the mandrel pull rod 2 is inserted into the mandrel 1, the mandrel pull rod 2 is composed of a thin shaft and a thick shaft, the outer end of the thin shaft is provided with a threaded hole, and one end of the push rod 3 is screwed into the threaded hole, and the other end of the push rod 3 contacts the output end of the cylinder in the CNC machine tool, the outer surface of the thick shaft is provided with a tapered groove 21, the outer surface of the mandrel 1 is annularly provided with a slide groove 11 corresponding to the tapered groove 21, and the expansion top slider 4 is inserted into the slide groove 11, the inner end of the expansion top slider 4 is an inclined arc surface matching the inner surface of the tapered groove 21, the guide positioning head 5 is fixedly installed on the outer end of the mandrel 1, the expansion top sleeve 6 is sleeved and assembled on the outer surface of the mandrel 1, and the outer surface of the expansion top sleeve 6 is staggered with empty grooves 61.

[0023] The installation structure of the CNC machine tool can be a chuck or other structure, which can drive the expansion sleeve equipment to rotate, and then drive the bottle preform 9 to rotate for external cylindrical processing.

[0024] The design of the tapered groove 21 on the mandrel pull rod 2 cooperates with the design of the inclined arc surface on the expansion slider 4, so that the mandrel pull rod 2 can drive the expansion slider 4 to move in the slide groove 11 during the movement of the mandrel pull rod 2. When the expansion slider 4 moves outward, pressure is generated on the expansion sleeve 6, causing it to deform and expand, thereby fixing the bottle embryo 9, which can effectively solve the deformation problem and correction difficulty caused by using the clamp, and at the same time improve production efficiency and product consistency.

[0025] The conical groove 21 is designed so that the small diameter end of the conical groove 21 faces the thin shaft, ensuring that the core shaft pull rod 2 can fix the bottle blank 9 when it moves away from the guide positioning head 5.

[0026] The internal expansion sleeve fixing method can achieve the effect of accurately fixing the bottle preform 9, ensure the coaxiality of each position on the bottle preform 9, and thus achieve uniform control of the wall thickness difference.

[0027] Compared with traditional clamps, the internal expansion sleeve fixing method can save calibration time and thus improve work efficiency.

[0028] The outer end surface of the guide positioning head 5 matches the inner cavity bottom of the bottle embryo 9. Mounting holes are provided at corresponding positions of the guide positioning head 5 and the core shaft 1. The guide positioning head 5 and the core shaft 1 are mounted by bolts.

[0029] The expansion set equipment is installed on a CNC machine tool, and the cylinder on the CNC machine tool drives the push rod 3 to move, and the chuck drives the expansion set equipment to rotate. Therefore, the processing process can be controlled through CNC programming and other methods to improve the processing accuracy.

[0030] Specifically, if Figure 3 As shown, an annular protrusion 12 is integrally formed on the outer surface of the core shaft 1 , the diameter of the guide positioning head 5 is the same as the diameter of the annular protrusion 12 and the outer diameter of the expansion sleeve 6 , and the expansion sleeve 6 is located between the annular protrusion 12 and the guide positioning head 5 .

[0031] The size of the annular protrusion 12, the guide positioning head 5, and the expansion sleeve 6 is set to ensure that the outer diameters of the parts of the expansion sleeve equipment where the bottle preform 9 is sleeved are the same, which can better expand and fix the bottle preform 9 and ensure coaxiality.

[0032] When the expansion set is installed on the CNC machine tool, the end of the chuck is clamped on the annular protrusion 12, which limits the position of the expansion set and ensures that it can rotate along the axis.

[0033] Specifically, if Figure 3 and Figure 4 As shown, a pin hole 13 is formed on the outer surface of the core shaft 1 , a positioning hole 62 corresponding to the pin hole 13 is formed on the outer surface of the expansion sleeve 6 , and a positioning pin is inserted into the positioning hole 62 and the pin hole 13 .

[0034] Specifically, if Figure 3 As shown, there are six empty slots 61 , and the positioning holes 62 are located between adjacent empty slots 61 . When the positioning holes 62 are aligned with the pin holes 13 , the slide slot 11 is located between adjacent empty slots 61 .

[0035] The positioning pin, the positioning hole 62 and the pin hole 13 cooperate to realize the positioning of the expansion sleeve 6, thereby ensuring that the expansion sleeve 6 can evenly contact the expansion slider 4, so that the force of the expansion sleeve 6 and the supporting effect of the expansion sleeve 6 on the bottle embryo 9 are uniform.

[0036] Specifically, if Figure 3 As shown, an adjusting nut 7 is threaded onto the outer surface of the push rod 3, and a disc spring 8 is sleeved onto the outer surface of the push rod 3. The large diameter end of the disc spring 8 faces the core shaft 1, and the disc spring 8 and the core shaft 1 are located on both sides of the mounting structure of the CNC machine tool.

[0037] When the output end of the cylinder no longer supports the ejector rod 3, the elastic force of the disc spring 8 drives the ejector rod 3 and the core shaft pull rod 2 to move, thereby causing the top expansion slider 4 to move outward, and finally fix the preform 9.

[0038] The adjusting nuts 7 are set to be two tightly fitted ones, which can ensure that they are difficult to loosen, thereby ensuring that the position of the disc spring 8 remains unchanged. The position of the adjusting nuts 7 can be adjusted, thereby achieving adjustment of the compression degree of the disc spring 8 and other aspects.

[0039] Specifically, if Figure 3 As shown, there are three disc springs 8, and the installation directions of the three disc springs 8 are the same.

[0040] In practice, the number of disc springs 8 can be adjusted to adjust the force for driving the core shaft pull rod 2 to move and the force for driving the expansion top slider 4 to move.

[0041] Specifically, if Figure 4 As shown, an inner cavity 14 is formed at the outer end of the core shaft 1, and a circular hole connected to the inner cavity 14 is formed at the inner end of the core shaft 1, and the diameter of the circular hole is smaller than the diameter of the inner cavity 14, the thin shaft of the core shaft pull rod 2 is located in the circular hole, and the thick shaft is located in the inner cavity 14, and the length of the inner cavity 14 is greater than the length of the thick shaft.

[0042] The inner cavity 14 is relatively long, so that the thick shaft of the core shaft pull rod 2 can move in the inner cavity 14, thereby realizing the movement of the expansion slider 4.

[0043] Specifically, if Figure 4 As shown, a limiting slot 15 is provided in the circular hole of the core shaft 1, a limiting block 22 is integrally formed on the outer surface of the thin shaft of the core shaft pull rod 2, and the limiting block 22 is inserted into the limiting slot 15, so as to facilitate the screw connection between the push rod 3 and the core shaft pull rod 2.

[0044] Embodiment 2

[0045] A method for using a metal seamless gas cylinder preform expansion device, using the metal seamless gas cylinder preform expansion device in Embodiment 1, comprising the following steps: Step 1: Assembly of the expansion sleeve equipment: first, insert the mandrel pull rod 2 into the inner cavity 14 of the mandrel 1, then place multiple expansion sliders 4 into the slide grooves 11 respectively, and then put the expansion sleeve 6 on the outer side of the mandrel 1, align the positioning hole 62 with the pin hole 13, insert the positioning pin to complete the positioning of the expansion sleeve 6, and finally fix the guide positioning head 5 at the outer end of the mandrel 1 by bolts to obtain the main body of the expansion sleeve equipment; Step 2: Install the expansion set equipment on the CNC machine tool, place the main body of the expansion set equipment on the outside of the mounting structure of the CNC machine tool, place the push rod 3 with the adjusting nut 7 screwed on and the disc spring 8 on the inside of the mounting structure of the CNC machine tool, and then screw one end of the push rod 3 into the threaded hole of the mandrel pull rod 2 until the disc spring 8 contacts and compresses the mounting structure of the CNC machine tool, and the other end of the push rod 3 corresponds to the output end of the cylinder; Since the length of the inner cavity 14 is greater than the length of the thick shaft of the mandrel rod 2, after the disc spring 8 contacts the mounting structure of the CNC machine tool, the push rod 3 can be rotated to continue to be screwed with the mandrel rod 2, so that the thick shaft of the mandrel rod 2 is located in the middle of the inner cavity 14, so that the mandrel rod 2 has enough space to move in the inner cavity 14 during the subsequent operation of the cylinder; Step 3: Install the preform 9, operate the cylinder, make the output end of the cylinder contact the ejector 3 and push it, so that the mandrel pull rod 2 moves toward the guide positioning head 5, and at the same time, the disc spring 8 is compressed, so that the conical groove 21 of the mandrel pull rod 2 does not generate thrust on the expansion slider 4. At this time, the expansion sleeve 6 is in the initial state, and the preform 9 is put on the expansion sleeve equipment from the guide positioning head 5, so that the guide positioning head 5 is in contact with the bottom of the preform 9; Step 4: fix the preform 9, operate the cylinder, and make the output end of the cylinder away from the ejector rod 3. Under the elastic force of the disc spring 8, the ejector rod 3 and the mandrel pull rod 2 are driven to move away from the guide positioning head 5. Under the action of the tapered groove 21, the expansion slider 4 is driven to move outward, contact and squeeze the expansion sleeve 6 to deform and expand it, thereby fixing the preform 9 from the inside. Step 5, processing the outer circle of the bottle preform 9, controlling the CNC machine tool to process the outer circle of the bottle preform 9; Step 6, material removal work, after completing the outer circle processing of the bottle preform 9, operate the cylinder again, make the output end of the cylinder contact the ejector rod 3 and push it, make the top expansion slider 4 fall back into the tapered groove 21, and reset the top expansion sleeve 6, release the bottle preform 9, and then the material removal work can be carried out; Step 7: Repeat steps 3 to 6 to complete the outer circle processing of multiple preforms 9.

[0046] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present invention. As long as these changes do not deviate from the concept of the present invention, they all belong to the protection scope of the present invention.

Claims

1. A metal seamless gas cylinder preform processing expansion sleeve equipment, assembled on the mounting structure of a CNC machine tool, Features: It includes a core shaft, a core shaft pull rod, a push rod, an expansion top slider, a guide positioning head and an expansion top sleeve, the core shaft pull rod is inserted into the core shaft, the core shaft pull rod is composed of a thin shaft and a thick shaft, the outer end of the thin shaft is provided with a threaded hole, and one end of the push rod is screwed into the threaded hole, the other end of the push rod contacts the output end of the cylinder in the CNC machine tool, the outer surface of the thick shaft is provided with a conical groove, the outer surface of the core shaft is provided with a slide groove corresponding to the conical groove, and the expansion top slider is inserted into the slide groove, the inner end of the expansion top slider is an inclined arc surface matching the inner surface of the conical groove, the guide positioning head is fixedly installed on the outer end of the core shaft, the expansion top sleeve is sleeved and assembled on the outer surface of the core shaft, and the outer surface of the expansion top sleeve is staggered with empty grooves.

2. According to the metal seamless gas cylinder preform expansion equipment described in claim 1, Features: An annular protrusion is integrally formed on the outer surface of the core shaft, the diameter of the guide positioning head is the same as the diameter of the annular protrusion and the outer diameter of the expansion sleeve, and the expansion sleeve is located between the annular protrusion and the guide positioning head.

3. According to the metal seamless gas cylinder preform expansion equipment described in claim 1, Features: The outer surface of the core shaft is provided with a pin hole, the outer surface of the expansion sleeve is provided with a positioning hole corresponding to the pin hole, and a positioning pin is inserted into the positioning hole and the pin hole.

4. According to the metal seamless gas cylinder preform expansion equipment described in claim 3, Features: There are six empty slots in total, and the positioning holes are located between adjacent empty slots. When the positioning holes are aligned with the pin holes, the sliding slots are located between adjacent empty slots.

5. According to the metal seamless gas cylinder preform expansion equipment described in claim 1, Features: An adjusting nut is threadedly connected to the outer surface of the push rod, and a disc spring is sleeved on the outer surface of the push rod. The large diameter end of the disc spring faces the core shaft, and the disc spring and the core shaft are located on both sides of the installation structure of the CNC machine tool.

6. According to the metal seamless gas cylinder preform expansion equipment described in claim 5, Features: There are three disc springs in total, and the installation directions of the three disc springs are the same.

7. According to the metal seamless gas cylinder preform expansion equipment described in claim 1, Features: The outer end of the core shaft is provided with an inner cavity, the inner end of the core shaft is provided with a circular hole connected to the inner cavity, and the diameter of the circular hole is smaller than the diameter of the inner cavity, the thin shaft of the core shaft pull rod is located in the circular hole, and the thick shaft is located in the inner cavity, and the length of the inner cavity is greater than the length of the thick shaft.

8. According to the metal seamless gas cylinder preform expansion equipment described in claim 7, Features: A limiting slide groove is arranged in the circular hole of the core shaft, a limiting block is integrally formed on the outer surface of the thin shaft of the core shaft pull rod, and the limiting block is inserted into the limiting slide groove.

9. A method for using a metal seamless gas cylinder preform expansion device, using the metal seamless gas cylinder preform expansion device as claimed in any one of claims 1 to 8. It is characterized in that The following steps are involved: Step 1: Assemble the expansion sleeve equipment. First, insert the mandrel pull rod into the inner cavity of the mandrel, then place multiple expansion sliders into the slide grooves respectively, and then put the expansion sleeve on the outer side of the mandrel. After aligning the positioning hole with the pin hole, insert the positioning pin to complete the positioning of the expansion sleeve. Finally, fix the guide positioning head at the outer end of the mandrel by bolts to obtain the main body of the expansion sleeve equipment. Step 2: Install the expansion set equipment on the CNC machine tool, place the main body of the expansion set equipment on the outside of the mounting structure of the CNC machine tool, place the push rod with the adjusting nut screwed on and the disc spring on the inside of the mounting structure of the CNC machine tool, and then screw one end of the push rod into the threaded hole of the mandrel pull rod until the disc spring contacts and compresses the mounting structure of the CNC machine tool, and the other end of the push rod corresponds to the output end of the cylinder; Step 3: Install the preform, operate the cylinder, make the output end of the cylinder contact the ejector rod and push it, so that the mandrel pull rod moves toward the side of the guide positioning head. At the same time, the disc spring is compressed, so that the conical groove of the mandrel pull rod does not produce thrust on the top expansion slider. At this time, the top expansion sleeve is in the initial state. Put the preform on the expansion sleeve equipment from the guide positioning head, so that the guide positioning head contacts the bottom of the preform; Step 4: Fix the preform and operate the cylinder to move the output end of the cylinder away from the ejector rod. Under the elastic force of the disc spring, the ejector rod and the mandrel pull rod are driven to move away from the guide positioning head. Under the action of the conical groove, the expansion slider is driven to move outward, contact and squeeze the expansion sleeve to deform and expand it, thereby fixing the preform from the inside. Step 5: Processing the outer circle of the bottle embryo, controlling the CNC machine tool to perform outer circle processing on the bottle embryo; Step 6: Material removal: After the outer circle of the preform is processed, the cylinder is operated again to make the output end of the cylinder contact the ejector rod and push it, so that the top expansion slider falls back into the conical groove, and the top expansion sleeve is reset, the preform is released, and the material removal can be carried out; Step 7: Repeat steps 3 to 6 to complete the outer circle processing of multiple preforms.

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