Injection molding mold structure of thin-wall plastic bottle blank

Abstract

The invention discloses an injection molding mold structure of a thin-wall plastic bottle blank, which comprises a cavity fixing plate, a positioning block fixing plate, an ejection plate, a core positioning sleeve fixing plate, a core fixing plate, a sliding guide assembly, an ejection mechanism and a PLC (programmable logic controller), a cavity with a hot runner injection nozzle is axially mounted on the cavity fixing plate, a valve needle is mounted in the hot runner injection nozzle in a matched manner, and the valve needle is arranged in the cavity fixing plate. The positioning block is axially provided with a mold core positioning sleeve, the first end of the mold core positioning sleeve is connected with the mold cavity through the positioning block, the ejector plate is connected with the corresponding positioning fixing plate, the mold core positioning sleeve fixing plate is used for fixing the mold core positioning sleeve, and a mold core penetrates through the mold core positioning sleeve fixing plate, the mold core positioning sleeve and the positioning block and then extends into the mold cavity during injection molding. A buffer area is reserved between the end of the mold core and the mold cavity, the sliding guide assembly is used for achieving sliding of the positioning block fixing plate during mold opening, the ejection mechanism is used for driving and controlling linear movement of the ejection plate, the mold integrates the injection molding function and the compression molding function, the injection molding pressure is reduced, and the bottle preform demolding stroke is short.

Description

Technical Field

[0001] The invention belongs to the technical field of molds, and in particular relates to an injection mold structure for thin-wall plastic bottle blanks. Background Art

[0002] With the development of social economy, the market demand for various plastic containers is increasing, and the requirements for lightweight plastic containers are getting higher and higher. The weight of plastic containers is getting lighter and lighter. Since the bottle blowing process has strict requirements on the expansion and stretching ratio of the bottle embryo, the optimization space by shortening and thinning the bottle embryo is limited. The more ideal direction is to reduce the wall thickness. However, reducing the wall thickness will greatly increase the injection pressure and equipment energy consumption, and reduce the life of the mold. In addition, the existing injection molds also have the problem of long mold opening stroke. Summary of the invention

[0003] The purpose of the present invention is to solve at least one problem of the prior art and to provide an injection mold structure for a thin-walled plastic bottle blank.

[0004] To achieve the above-mentioned purpose, the present invention proposes an injection mold structure for a thin-walled plastic bottle blank, comprising a cavity fixing plate, a positioning block fixing plate, an ejection plate, a core positioning sleeve fixing plate, a core fixing plate, a sliding guide assembly, an ejection mechanism and a PLC controller, which are arranged in sequence from left to right. The cavity fixing plate is axially mounted with a cavity, a first end of the cavity is connected to a hot runner nozzle, a valve needle is cooperatively installed in the hot runner nozzle, the valve needle is connected to a linear valve needle control assembly for driving and controlling the linear movement of the valve needle to realize the opening and closing of the hot runner nozzle, and the positioning block fixing plate includes a The upper positioning block fixing plate and the lower positioning fixing plate are included, a core positioning sleeve is axially installed between the upper positioning block fixing plate and the lower positioning fixing plate, a core positioning sleeve is provided with a core channel inside, a first end of the core positioning sleeve and the cavity are connected by a positioning block, a cavity for bottle embryo molding is provided inside the positioning block, one end of the ejector plate close to the cavity fixing plate is slidably connected with the upper positioning block fixing plate and the lower positioning fixing plate, the core positioning sleeve fixing plate is used to fix the core positioning sleeve, the core fixing plate is used to install the core, and the core passes through the core positioning sleeve from right to left in sequence during injection molding. The fixed plate, the core positioning sleeve, and the positioning block are extended into the cavity, a buffer zone is left between the end of the core and the cavity, and a gap for injection molding of the bottle blank is left between the outer wall of the core and the core positioning sleeve and the cavity. The end of the core fixing plate away from the core is connected to a linear compression control component for driving and controlling the linear movement of the core fixing plate. The sliding guide component includes a mold opening guide rail and a guide wheel. The mold opening guide rail is provided with a guide groove, which includes a transverse section and an oblique section. One end of the mold opening guide rail is fixed to the core positioning sleeve fixing plate, and the guide wheel is connected to the positioning block fixing plate. The guide wheel is installed in the guide groove and moves along the guide groove. The ejection mechanism is connected to the ejection plate and drives the ejection plate to move linearly. After the ejection plate moves, it drives the guide wheel of the positioning block fixing plate to move along the guide groove. When the guide wheel continues to move toward the oblique section along the lateral section of the guide groove, the upper positioning block fixing plate and the lower positioning block fixing plate open outward. The PLC controller is connected to the linear valve needle control component, the linear compression molding control component and the ejection mechanism to control the opening and closing of the valve needle and the hot runner nozzle, the compression molding of the core, and the movement of the ejection plate.

[0005] Preferably, the second end of the cavity and the end of the core positioning sleeve close to the cavity are both provided with tapered positioning openings, and both ends of the positioning block are provided with tapered positioning portions adapted to the tapered positioning openings.

[0006] Preferably, the conical positioning portion is provided with an exhaust groove.

[0007] Preferably, the core channel comprises a conical section channel and a cylindrical section channel which are interconnected, the diameter of the cylindrical section channel is larger than the maximum diameter of the conical section channel, and the middle outer wall of the core is provided with a stepped transition structure adapted to the conical section channel and the cylindrical section channel.

[0008] Preferably, the ejection mechanism comprises an ejection rod and a linear drive unit, the linear drive unit is connected to the ejection rod and drives and controls the movement of the ejection rod, and the ejection rod is connected to the ejection plate.

[0009] Preferably, cooling water channels are provided inside the core and outside the cavity.

[0010] Preferably, the linear valve needle control assembly includes a push rod cylinder, a push rod end of the push rod cylinder is connected to the valve needle, and the push rod cylinder is connected to a PLC controller. The movement state of the push rod cylinder and the valve needle is controlled by the PLC controller, thereby controlling the opening and closing time of the hot runner nozzle.

[0011] Preferably, the linear compression molding control assembly includes a proportional servo valve cylinder and a compression molding push rod, the push rod end of the proportional servo valve cylinder is connected to the compression molding push rod and controls the movement of the compression molding push rod, the proportional servo valve cylinder is equipped with an electronic ruler for measuring the movement distance of the push rod, the electronic ruler and the proportional servo valve cylinder are both connected to a PLC controller, and the PLC controller controls the working state of the proportional servo valve cylinder according to the numerical value of the electronic ruler.

[0012] Preferably, the injection mold structure further comprises a display screen having control buttons, and the display screen and the control buttons are connected to a PLC controller.

[0013] Preferably, a guide rail is provided at one end of the ejection plate close to the positioning block fixing plate, and the upper positioning block fixing plate and the lower positioning block fixing plate are slidably connected to the guide rail.

[0014] The beneficial effects of the present invention are as follows: the present invention integrates the functions of injection molding and compression molding, reduces the injection molding pressure when producing thin-walled plastic bottle embryos, the injection molding volume can be automatically regulated, the bottle embryo demolding stroke is short, the mold opening space is reduced, and the mold size is small.

[0015] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0017] Figure 2 It is a schematic diagram of the mold closing and injection molding state of an embodiment of the present invention.

[0018] Figure 3 It is a schematic diagram of the mold closing and compression molding state of an embodiment of the present invention.

[0019] Figure 4 Schematic diagram of mold opening state of an embodiment of the present invention.

[0020] Figure 5 It is a schematic diagram of a local structure of an embodiment of the present invention.

[0021] Figure 6 It is a schematic diagram of a local structure of an embodiment of the present invention.

[0022] Figure 7 It is a schematic diagram of the installation of the positioning block fixing plate and the ejection plate according to an embodiment of the present invention.

[0023] In the figure: 1. Cavity fixing plate; 2. Positioning block fixing plate; 3. Ejector plate; 4. Core positioning sleeve fixing plate; 5. Core fixing plate; 6. Positioning block; 7. Sliding guide assembly; 8. Linear compression control assembly; 9. Ejector mechanism; 10. Bottle embryo; 11. Cavity; 12. Hot runner nozzle; 13. Valve needle; 21. Core positioning sleeve; 51. Core. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described in conjunction with the drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. The components of the embodiment of the present application described and shown in the drawings here can be arranged and designed in various different configurations. In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship usually placed when the application product is used, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] The present invention is described in detail below in conjunction with the accompanying drawings.

[0027] See also Figures 1 to 7The present embodiment provides an injection mold structure for a thin-walled plastic bottle blank, comprising a cavity fixing plate 1, a positioning block fixing plate 2, an ejector plate 3, a core positioning sleeve fixing plate 4, a core fixing plate 5, a sliding guide assembly 7, an ejector mechanism 9 and a PLC controller, which are arranged in sequence from left to right. The cavity fixing plate 1 is axially mounted with a cavity 11, a first end of the cavity 11 is connected to a hot runner nozzle 12, a valve needle 13 is mounted in the hot runner nozzle 12, and the valve needle 13 is connected to a linear valve needle control assembly for driving and controlling the linear movement of the valve needle to realize the opening and closing of the hot runner nozzle 12. The positioning block fixing plate 2 includes an upper A positioning block fixing plate and a lower positioning fixing plate, a core positioning sleeve 21 is axially installed between the upper positioning block fixing plate and the lower positioning fixing plate, a core positioning sleeve 21 is provided with a core channel inside, a first end of the core positioning sleeve 21 and the cavity 11 are connected by a positioning block 6, a cavity for forming the bottle embryo 10 is provided inside the positioning block 6, an end of the ejector plate 3 close to the cavity fixing plate 1 is slidably connected with the upper positioning block fixing plate and the lower positioning fixing plate, a core positioning sleeve fixing plate 4 is used to fix the core positioning sleeve 21, a core fixing plate 5 is used to install a core 51, and during injection molding, the core 51 passes through the core positioning sleeve fixing plate from right to left in sequence The fixed plate 4, the core channel of the core positioning sleeve 21, and the positioning block 6 extend into the cavity 11, a buffer zone is left between the end of the core 51 and the cavity 11, and a gap for injection molding of the bottle blank is left between the outer wall of the core 51 and the core positioning sleeve 21 and the cavity 11. The end of the core fixing plate 5 away from the core 51 is connected to a linear compression control component 8 for driving and controlling the linear movement of the core fixing plate 5. The sliding guide component 7 includes a mold opening guide rail and a guide wheel. The mold opening guide rail is provided with a guide groove, and the guide groove includes a transverse section and an oblique section. One end of the mold opening guide rail is fixed on the core positioning sleeve fixing plate 5, and the guide wheel is connected to the positioning sleeve fixing plate 5. The upper and lower positioning block fixing plates are opened outwardly, and the PLC controller is connected to the linear valve needle control assembly, the linear compression molding control assembly 8 and the ejection mechanism 9, thereby controlling the opening and closing of the valve needle 13 and the hot runner nozzle 12, the compression molding of the core 51, and the movement of the ejection plate 3.

[0028] Among them, there are multiple groups of sliding guide components 7, preferably, there are four groups of sliding guide components 7, and one group of sliding guide components 7 is respectively installed on both sides of the upper positioning block fixing plate and the lower positioning block fixing plate to ensure that the injection mold is more stable when opening and closing the mold. The oblique section of the guide groove on the mold opening guide rail is located on the side close to the positioning block fixing plate 2, the transverse section of the guide groove on the mold opening guide rail is parallel to the core 51, and the ends of the oblique section and transverse section of the guide groove on the mold opening guide rail are provided with baffles. In order to improve the sensing effect, sensors for detecting the moving position of the guide wheel can also be set at the ends and intersections of the oblique section and transverse section of the guide groove. The sensors include but are not limited to photoelectric sensors or laser sensors, and the sensors are connected to the PLC controller.

[0029] In actual use, when the injection mold is closed, a closed preform molding area is formed between the cavity 11, the core 51, the positioning block 6 and the core positioning sleeve 21; in order to improve the sealing performance of the mold closing, sealing rings can also be provided at the connection between the cavity 11 and the positioning block 6, the connection between the positioning block 6 and the core positioning sleeve 21, and the connection between the core positioning sleeve 21 and the core 51; the cooling water circuit outside the cavity 11 is arranged in a winding manner, and the pipe water inlet and water outlet of the cooling water circuit are located on the cavity fixing plate 1; the inside of the core 51 and the outside of the cavity 11 are both provided with cooling water circuits, and the cooling water circuit inside the core 51 is axially arranged, and the pipe water inlet and water outlet of the cooling water circuit are located on the core fixing plate 5; the positioning block 6 includes an upper positioning block and a lower positioning block, and the cavity 11 and the cavity fixing plate 1 are provided with a plurality of cooling water circuits. The fixed plate 1, the upper positioning block and the upper positioning block fixing plate, the lower positioning block and the lower positioning block fixing plate, the core positioning sleeve 21 and the core positioning sleeve fixing plate 4, and the core 51 and the core fixing plate 5 are all fixed with fastening bolts; a buffer zone is left between the end of the core 51 and the cavity 11, and the buffer zone can effectively reduce the injection pressure. The volume of the buffer zone depends on the length of the core 51 inserted into the cavity 11. The longer the length, the smaller the volume of the buffer zone, and the smaller the length, the larger the volume of the buffer zone; when opening the mold, the upper positioning block and the upper positioning block fixing plate move along the guide groove with the guide wheel toward the cavity fixing plate and outward, while the core 51 moves backward with the core fixing plate 5, shortening the stroke of bottle embryo demolding, reducing the mold opening space, and reducing the size of the compression molding machine and the mold.

[0030] In this embodiment, refer to Figures 2 to 4 The second end of the cavity 11 and the end of the core positioning sleeve 21 close to the cavity 11 are both provided with a tapered positioning opening, and the two ends of the positioning block 6 are provided with a tapered positioning portion adapted to the tapered positioning opening. By utilizing the mutual cooperation and connection between the tapered top portion and the tapered surface of the tapered positioning opening, the precise positioning and installation between the cavity 11, the core positioning sleeve 21 and the positioning block 6 can be better achieved.

[0031] Furthermore, the conical positioning portion is provided with an exhaust groove, and the arrangement of the exhaust groove facilitates exhaust and improves the compression molding effect.

[0032] In this embodiment, the core channel includes a conical section channel and a cylindrical section channel which are interconnected. The diameter of the cylindrical section channel is larger than the maximum diameter of the conical section channel. The middle outer wall of the core 51 is provided with a stepped transition structure adapted to the conical section channel and the cylindrical section channel. By providing the conical section pipeline, on the one hand, the core channel and the core 51 can be precisely guided and installed, and on the other hand, the relative friction between the two can be reduced, thereby increasing the service life of the parts and reducing the formation of flash burrs on the plastic parts.

[0033] In this embodiment, refer to Figures 2 to 4 The ejection mechanism 9 includes an ejection rod and a linear drive unit, the linear drive unit is connected to the ejection rod and drives and controls the movement of the ejection rod, and the ejection rod passes through the core fixing plate 5 and the core positioning sleeve fixing plate 4 and is connected to the ejection plate 3. The linear drive unit includes but is not limited to a cylinder, a hydraulic cylinder, and a push rod motor.

[0034] In this embodiment, the linear valve needle control assembly includes a push rod cylinder, the push rod end of the push rod cylinder is connected to the valve needle 13, and the push rod cylinder is connected to the PLC controller, and the movement state of the push rod cylinder and the valve needle 13 is controlled by the PLC controller, thereby controlling the opening and closing time of the hot runner nozzle 12. Under the premise of satisfying the linear drive control of the valve needle movement, a hydraulic cylinder or a push rod motor can also be used instead of the push rod cylinder.

[0035] In this embodiment, refer to Figures 2 to 4 The linear compression molding control assembly 8 includes a proportional servo valve cylinder and a compression molding ejector rod. The push rod end of the proportional servo valve cylinder is connected to the compression molding ejector rod and controls the movement of the compression molding ejector rod. The proportional servo valve cylinder is equipped with an electronic ruler for measuring the movement distance of the push rod. The electronic ruler and the proportional servo valve cylinder are both connected to the PLC controller. The PLC controller controls the working state of the proportional servo valve cylinder according to the numerical value of the electronic ruler. The compression molding ejector rod is connected to the core fixing plate 5. Under the premise of satisfying the linear drive compression molding ejector rod movement and measuring its displacement, the proportional servo valve cylinder can also be replaced by a cylinder and a push rod motor.

[0036] In this embodiment, the injection mold structure also includes a display screen, which has control buttons. The display screen and the control buttons are connected to the PLC controller. The information displayed on the display screen includes but is not limited to the opening and closing time of the valve needle and the hot runner nozzle, and the displacement of the core fixing plate. The control buttons are used to adjust the opening and closing time of the valve needle and the hot runner nozzle, the displacement of the core fixing plate and the overall switch operation of the injection mold.

[0037] In this embodiment, refer to Figures 5 to 7The end of the ejector plate 3 close to the positioning block fixing plate 2 is fixed with a guide rail by bolts, and the upper positioning block fixing plate and the lower positioning block fixing plate are slidably connected with the guide rail. Of course, the ejector plate 3 and the upper positioning block fixing plate and the lower positioning block fixing plate can also be slidably connected by means of a slider and a slide groove.

[0038] Working process of the present invention:

[0039] During the working process of the injection molding mold structure of the thin-walled plastic preform, the mold is first closed before injection molding, so that a closed preform molding area is formed between the cavity 11, the core 51, the positioning block 6 and the core positioning sleeve 21, and the injection molding process begins. The valve needle 13 is opened, and the molten plastic is injected from the hot runner nozzle 12 into the preform molding area in the cavity. When the injection molding volume reaches a predetermined value, the valve needle 13 is closed, and the compression molding process begins. The linear compression molding control component 8 drives the core fixing plate 5 to move toward the cavity 11. While the core fixing plate 5 moves, it drives the core 51 to be further inserted into the cavity 11. Under the extrusion of the core 51, the molten plastic extends along the outer wall of the core 51 toward the positioning block to extrude the expected preform 1. 0 shape, during the compression molding process, the cooling water channel cools the cavity 11 and the core 51 so that the preform is cooled and formed, and the mold is opened after the injection and compression are completed. The ejector mechanism 9 drives the ejector plate to move away from the core fixing plate 5. While the ejector plate moves, it drives the lower positioning block fixing plate and the lower positioning block to move synchronously, and the guide wheel moves along the transverse section of the guide groove. When the guide wheel slides to the oblique section of the guide groove, the upper positioning block fixing plate and the lower positioning block fixing plate move outward under the action of the guide wheel and the guide rail, and the linear compression molding control component 8 drives the core fixing plate 5 to move away from the cavity fixing plate 1. The mold is opened, the preform is removed, and the mold is closed again. Repeating the above injection molding, compression molding and mold opening can realize continuous preform production.

[0040] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. An injection mold structure for thin-walled plastic preforms, characterized in that: The present invention comprises a cavity fixing plate, a positioning block fixing plate, an ejection plate, a core positioning sleeve fixing plate, a core fixing plate, a sliding guide assembly, an ejection mechanism and a PLC controller which are arranged in sequence from left to right. The cavity fixing plate is axially mounted with a cavity, a hot runner nozzle is connected to the first end of the cavity, a valve needle is matched and installed in the hot runner nozzle, and the valve needle is connected to a linear valve needle control assembly for driving and controlling the linear movement of the valve needle to realize the opening and closing of the hot runner nozzle. The positioning block fixing plate comprises an upper positioning block fixing plate and a lower positioning fixing plate. The upper positioning block fixing plate is A core positioning sleeve is axially installed between the plate and the lower positioning fixing plate, a core channel is arranged inside the core positioning sleeve, a first end of the core positioning sleeve is connected to the cavity by a positioning block, a cavity for bottle embryo molding is arranged inside the positioning block, one end of the ejector plate close to the cavity fixing plate is slidably connected with the upper positioning block fixing plate and the lower positioning fixing plate, the core positioning sleeve fixing plate is used to fix the core positioning sleeve, the core fixing plate is used to install the core, and during injection molding, the core passes through the core positioning sleeve fixing plate, the core positioning sleeve, the positioning block and the rear extension in sequence from right to left The mold is inserted into the mold cavity, a buffer zone is left between the end of the core and the mold cavity, a gap for injection molding of the bottle blank is left between the outer wall of the core and the core positioning sleeve and the mold cavity, and the end of the core fixing plate away from the core is connected to a linear compression control component for driving and controlling the linear movement of the core fixing plate, and the sliding guide component includes a mold opening guide rail and a guide wheel, the mold opening guide rail is provided with a guide groove, and the guide groove includes a transverse section and an oblique section, one end of the mold opening guide rail is fixed on the core positioning sleeve fixing plate, the guide wheel is connected to the positioning block fixing plate, and the guide wheel is equipped with a mold opening guide rail. The ejector plate is connected to the ejector plate and drives the ejector plate to move linearly. After the ejector plate moves, it drives the guide wheel of the positioning block fixing plate to move along the guide groove. When the guide wheel continues to move toward the oblique section along the transverse section of the guide groove, the upper positioning block fixing plate and the lower positioning block fixing plate open outward. The PLC controller is connected to the linear valve needle control component, the linear compression control component and the ejector mechanism to control the opening and closing of the valve needle and the hot runner nozzle, the compression of the core, and the movement of the ejector plate.

2. The injection mold structure for thin-walled plastic bottle blanks according to claim 1, characterized in that: The second end of the cavity and the end of the core positioning sleeve close to the cavity are both provided with tapered positioning openings, and both ends of the positioning block are provided with tapered positioning parts adapted to the tapered positioning openings.

3. The injection mold structure of the thin-walled plastic bottle blank according to claim 2, characterized in that: The conical positioning portion is provided with an exhaust groove.

4. The injection mold structure for thin-walled plastic bottle blanks according to claim 1, characterized in that: The core channel comprises a conical section channel and a cylindrical section channel which are interconnected. The diameter of the cylindrical section channel is larger than the maximum diameter of the conical section channel. The outer wall of the middle part of the core is provided with a stepped transition structure adapted to the conical section channel and the cylindrical section channel.

5. The injection mold structure for thin-walled plastic bottle blanks according to claim 1, characterized in that: The ejection mechanism comprises an ejection rod and a linear drive unit. The linear drive unit is connected to the ejection rod and drives and controls the movement of the ejection rod. The ejection rod is connected to the ejection plate.

6. The injection mold structure for thin-walled plastic preforms according to claim 1, characterized in that: The inside of the core and the outside of the cavity are both provided with cooling water channels.

7. The injection mold structure for thin-walled plastic bottle blanks according to claim 1, characterized in that: The linear valve needle control assembly includes a push rod cylinder, a push rod end of the push rod cylinder is connected to the valve needle, and the push rod cylinder is connected to a PLC controller. The movement state of the push rod cylinder and the valve needle is controlled by the PLC controller, thereby controlling the opening and closing time of the hot runner nozzle.

8. The injection mold structure for thin-walled plastic preforms according to claim 1, characterized in that: The linear compression molding control component includes a proportional servo valve cylinder and a compression molding ejector rod. The push rod end of the proportional servo valve cylinder is connected to the compression molding ejector rod and controls the movement of the compression molding ejector rod. The proportional servo valve cylinder is equipped with an electronic ruler for measuring the movement distance of the push rod. The electronic ruler and the proportional servo valve cylinder are both connected to a PLC controller. The PLC controller controls the working state of the proportional servo valve cylinder according to the numerical value of the electronic ruler.

9. The injection mold structure for thin-walled plastic bottle blanks according to claim 1, characterized in that: It also includes a display screen having control buttons, and the display screen and the control buttons are connected to a PLC controller.

10. The injection mold structure of the thin-walled plastic bottle blank according to claim 1, characterized in that: A guide rail is arranged at one end of the ejection plate close to the positioning block fixing plate, and the upper positioning block fixing plate and the lower positioning block fixing plate are slidably connected with the guide rail.

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