Injection mold for forming cylindrical plastic products with internal spiral blades

Abstract

The present application relates to an injection mold, and aims to solve the problem of how to optimize the rotary core-pulling structure, and provides an injection mold for molding a cylindrical plastic product with an inner spiral blade. The injection mold for molding a cylindrical plastic product with an inner spiral blade includes a bottom plate, a fixed plate, an ejector plate, a push piece, a side core-pulling piece, and a rotary core-pulling piece. The ejector plate pushes the push plate in the vertical direction through a push rod, and the push plate moves the side core-pulling block in the vertical direction, so that the side core-pulling block slides along the slider, and the side core-pulling block is separated from the side hole of the plastic product in the horizontal direction; and the ejector plate cooperates with the circumferential surface of the core shaft, and the ejector plate moves in the vertical direction and drives the core shaft to rotate, so that the inner wall of the plastic product is demolded. Such a setting enables the injection mold for molding a cylindrical plastic product with an inner spiral blade to complete the linkage between the demolding action and the mold opening action of the plastic product without the help of a cylinder or a motor drive, so as to achieve the effect of optimizing the rotary core-pulling structure.

Description

Technical Field

[0001] The present application relates to an injection mold, in particular to an injection mold for molding a cylindrical plastic product with an inner spiral sheet. Background Art

[0002] In some plastic products, the plastic product has an inner spiral sheet. The structure of the plastic product is cylindrical, and there are four spiral sheets with the same characteristics inside. The four spiral sheets are evenly distributed around the central axis. Due to the special shape, the core pulling action must be carried out in a rotating manner.

[0003] In the prior art, the rotary core pulling usually uses a motor to drive a threaded rod, and the threaded rod rotates to drive the injection core to rotate in conjunction, thereby realizing the rotary core pulling. However, due to the use of a motor and a threaded rod for transmission, the mold structure is complicated. How to solve the above technical problems is what the technicians in this field need to consider. Summary of the invention

[0004] The present application provides an injection mold for molding a cylindrical plastic product with an inner spiral blade, so as to solve the problem of how to optimize the rotary core-pulling structure.

[0005] An embodiment of the present application provides an injection mold for molding a cylindrical plastic product with an inner spiral blade, comprising a base plate, a fixed plate, an ejector plate, a push piece, a side core pulling piece and a rotating core pulling piece. The fixed plate is spaced apart from the base plate along the vertical direction. The ejector plate is movably arranged between the base plate and the fixed plate along the vertical direction. The push piece comprises a push plate and a push rod, wherein the push plate is arranged on the side of the fixed plate opposite to the ejector plate, and one end of the push rod is fixedly connected to the push plate and the other end is fixedly connected to the ejector plate. The side core pulling piece comprises a slider and a side core pulling block, wherein the side core pulling block is movably arranged on the push plate along the horizontal direction, and the side core pulling block is used to mold the side hole of the plastic product, one end of the slider is fixedly connected to the fixed plate, and the other end is slidably connected to the side core pulling block, and the slider is used to guide the side core pulling block to move horizontally. The rotating core-pulling component includes a core shaft, the middle part of which is rotatably connected to the fixed plate, one end of the core shaft extends into the ejector plate, and the other end extends into the side core-pulling block, the ejector plate can be forced to move along the vertical direction and drive the side core-pulling block to separate from the side hole of the plastic product, and the ejector plate can be forced to move along the vertical direction and drive the core shaft to rotate so that the inner wall of the plastic product located at the side core-pulling block is demolded.

[0006] Compared with the prior art, the ejector plate of the injection mold for forming a cylindrical plastic product with an inner spiral blade provided in the present embodiment pushes the push plate in the vertical direction through the push rod, and the push plate moves the side core pulling block in the vertical direction, so that the side core pulling block slides along the slider, and the side core pulling block is separated from the side hole of the plastic product in the horizontal direction; and, the ejector plate cooperates with the circumferential surface of the core shaft, and the ejector plate moves in the vertical direction and drives the core shaft to rotate, thereby demolding the inner wall of the plastic product. Such an arrangement enables the injection mold for forming a cylindrical plastic product with an inner spiral blade to complete the linkage between the demolding action of the plastic product and the mold opening action without the aid of an oil cylinder or a motor drive, so as to achieve the effect of optimizing the rotary core pulling structure.

[0007] In a possible embodiment, a spiral groove is provided on the circumference of the core shaft near the ejector plate, and the spiral groove extends along the length direction of the core shaft; the rotary core-pulling part also includes a guide screw, one end of which is fixedly connected to the ejector plate and the other end extends into the spiral groove, and the guide screw is slidably arranged in the spiral groove, and the ejector plate is used to drive the guide screw to move in the vertical direction so that the guide screw slides in the spiral groove and drives the core shaft to rotate.

[0008] In this embodiment, the injection mold for molding a cylindrical plastic product with an inner spiral blade uses a guide screw to hold the side wall of the spiral groove so that the core shaft rotates on the fixed plate, thereby demolding the inner wall of the plastic product to achieve the effect of optimizing the rotary core pulling structure.

[0009] In a possible embodiment, the rotating core-pulling component further includes a guide sleeve, a circumferential surface of the guide sleeve is fixedly connected to the ejector plate, an inner wall of the guide sleeve corresponds to the circumferential surface of the core shaft, and the guide screw radially penetrates the guide sleeve and extends into the spiral groove.

[0010] In this embodiment, the guide screw is subjected to a large reaction force from the side wall of the spiral groove. The guide screw is fixedly arranged on a guide sleeve. The guide sleeve is used to guide the guide screw to reduce the deformation of the guide screw due to force, so that the guide screw and the spiral groove are stably matched, and the stability of the screw sliding in the spiral groove and driving the core shaft to rotate is improved, so as to achieve the effect of optimizing the rotary core pulling structure.

[0011] In a possible implementation manner, at least two guide screws are provided, and the guide screws are evenly distributed around the circumference of the core shaft.

[0012] In this embodiment, the guide screws are evenly distributed around the core shaft, and two or more guide screws jointly support the side walls of the spiral groove, so that the core shaft is evenly stressed, which is beneficial to the stability of the screws sliding in the spiral groove and driving the core shaft to rotate, so as to achieve the effect of optimizing the rotary core pulling structure.

[0013] In a possible implementation, the push plate is provided with a slide groove, the slide groove extends along the horizontal direction, the side core pulling block is slidably provided in the slide groove, and the side core pulling block corresponds to the bottom wall of the slide groove.

[0014] In this embodiment, the side core pulling block is slidably arranged in the slide groove along the horizontal direction, and the push plate moves along the vertical direction to drive the side core pulling block to move along the vertical direction relative to the slider. The slider supports the side core pulling block so that the side core pulling block moves horizontally, thereby the side core pulling block is detached from the side hole of the plastic product.

[0015] In a possible embodiment, the side core pulling block is provided with a through hole, and the through hole is arranged along a direction inclined to the vertical direction; the slider includes a connecting part and a sliding part, and the connecting part extends along the vertical direction, one end of the connecting part is fixedly connected to the fixed plate, and the other end is integrally connected to the sliding part, and the sliding part extends into the through hole along a direction inclined to the vertical direction.

[0016] In a possible implementation manner, the side core-pulling block is provided with a boss near the circumference of the plastic product, and the boss is used to form a side hole of the plastic product.

[0017] In a possible implementation manner, the push member further includes a spring, the spring is sleeved on the circumference of the push rod, one end of the spring is connected to the fixing plate, and the other end of the spring is connected to the ejector plate.

[0018] In a possible embodiment, the injection mold for molding a cylindrical plastic product with an inner spiral blade also includes a mold opening mechanism, which is arranged on the side of the push plate and is used to separate the push plate from the fixed plate after the mother mold is opened.

[0019] In a possible implementation, the bottom plate is provided with a through hole, the through hole corresponds to the bottom surface of the ejector plate, and the through hole is used to pass an ejector rod so that the ejector rod pushes against the ejector plate to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a three-dimensional schematic diagram of an injection mold for molding a cylindrical plastic product with an inner spiral sheet according to an embodiment of the present application; Figure 2 for Figure 1A schematic diagram of the structure of an injection mold for molding a cylindrical plastic product with an inner spiral sheet; Figure 3 for Figure 1 A schematic diagram of another cross-sectional structure of an injection mold for molding a cylindrical plastic product with an inner spiral sheet; Figure 4 for Figure 1 A schematic diagram of another cross-sectional structure of an injection mold for molding a cylindrical plastic product with an inner spiral sheet; Figure 5 for Figure 1 A three-dimensional schematic diagram of a side core pulling member and a rotary core pulling member of an injection mold for molding a cylindrical plastic product with an inner spiral blade; Figure 6 for Figure 5 An exploded view of some parts of the side core puller and the rotary core puller of the injection mold for molding a cylindrical plastic product with an inner spiral blade; Figure 7 for Figure 5 A three-dimensional schematic diagram of a side core pulling part and a rotating core pulling part after the ejector plate of an injection mold for molding a cylindrical plastic product with an inner spiral blade moves upward.

[0022] Description of main component symbols: 1. Injection mold for molding cylindrical plastic products with inner spiral blades; 11. Bottom plate; 111. Through hole; 12. Support plate; 13. Fixing plate; 14. Ejector plate; 15. Push piece; 151. Push plate; 152. Slide groove; 153. Push rod; 154. Spring; 16. Side core-pulling piece; 161. Sliding block; 162. Connecting part; 163. Sliding part; 164. Side core-pulling block; 165. Through hole; 166. Boss; 17. Rotary core-pulling piece; 171. Mandrel; 172. Spiral groove; 173. Guide screw; 174. Guide sleeve; 18. Mold opening mechanism; 191. Horizontal direction; 192. Vertical direction; 2. Plastic product; 21. Side hole; 22. Spiral blade; 23. Opening. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0024] Some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0025] Example See also Figures 1 to 7As shown, this embodiment provides an injection mold 1 for molding a cylindrical plastic product with an inner spiral blade, comprising a bottom plate 11, a fixed plate 13, an ejector plate 14, a push piece 15, a side core pull piece 16 and a rotating core pull piece 17. The fixed plate 13 is spaced apart from the bottom plate 11 along the vertical direction 192. The ejector plate 14 is movably disposed between the bottom plate 11 and the fixed plate 13 along the vertical direction 192. The push piece 15 comprises a push plate 151 and a push rod 153, wherein the push plate 151 is disposed on a side of the fixed plate 13 opposite to the ejector plate 14, and one end of the push rod 153 is fixedly connected to the push plate 151, and the other end is fixedly connected to the ejector plate 14. The side core pulling member 16 includes a slider 161 and a side core pulling block 164. The side core pulling block 164 is movably arranged on the push plate 151 along the horizontal direction 191. The side core pulling block 164 is used to form the side hole 21 of the plastic product 2. One end of the slider 161 is fixedly connected to the fixed plate 13, and the other end is slidably connected to the side core pulling block 164. The slider 161 is used to guide the side core pulling block 164 to move horizontally. The rotating core pulling member 17 includes a core shaft 171, the middle part of which is rotatably connected to the fixed plate 13, one end of the core shaft 171 extends into the ejector plate 14, and the other end extends into the side core pulling block 164, the ejector plate 14 can be forced to move along the vertical direction 192 and drive the side core pulling block 164 to separate from the side hole 21 of the plastic product 2, and the ejector plate 14 can be forced to move along the vertical direction 192 and drive the core shaft 171 to rotate so that the inner wall of the plastic product 2 located at the side core pulling block 164 is demolded.

[0026] The ejector plate 14 of the injection mold 1 for molding a cylindrical plastic product with an inner spiral blade provided in this embodiment pushes the push plate 151 along the vertical direction 192 through the push rod 153, and the push plate 151 moves the side core pulling block 164 along the vertical direction 192, so that the side core pulling block 164 slides along the slider 161, and the side core pulling block 164 is separated from the side hole 21 of the plastic product 2 along the horizontal direction 191; and, the ejector plate 14 cooperates with the circumferential surface of the core shaft 171, and the ejector plate 14 moves along the vertical direction 192 and drives the core shaft 171 to rotate, so that the inner wall of the plastic product 2 is demolded. Such an arrangement enables the injection mold 1 for molding a cylindrical plastic product with an inner spiral blade to complete the linkage between the demolding action and the mold opening action of the plastic product 2 without the aid of an oil cylinder or a motor drive, so as to optimize the rotary core pulling structure.

[0027] In this embodiment, the injection mold 1 for molding a cylindrical plastic product with an inner spiral blade further includes two support plates 12, which are spaced apart from the bottom plate 11 along the horizontal direction 191. The support plates 12 protrude along the vertical direction 192, one end of the support plates 12 is fixedly connected to the bottom plate 11, and the other end is fixedly connected to the fixed plate 13, the support plates 12 are supported between the bottom plate 11 and the fixed plate 13, the bottom plate 11, the support plates 12 and the fixed plate 13 enclose a motion space, and the ejector plate 14 moves in the motion space along the vertical direction 192.

[0028] A side hole 21 is opened on the side of the cylindrical plastic product 2 with an inner spiral sheet 22, a plurality of spiral sheets 22 are provided on the top of the cylindrical plastic product 2 with an inner spiral sheet 22, and an opening 23 is provided on the bottom of the cylindrical plastic product 2 with an inner spiral sheet 22, and the side hole 21 is connected with the opening 23. The slider 161 drives the side core-pulling block 164 to move along the horizontal direction 191 to form the side hole 21 of the plastic product 2, the top of the mandrel 171 is used to form the spiral sheet 22 on the top of the plastic product 2, and the ejector plate 14 moves along the vertical direction 192 and drives the mandrel 171 to rotate, so that the spiral sheet 22 on the top of the plastic product 2 is demolded. Such a configuration enables the injection mold 1 for molding a cylindrical plastic product with an inner spiral sheet to complete the demolding action of the plastic product 2 without the aid of an oil cylinder or a motor drive, so as to optimize the rotary core-pulling structure.

[0029] In a possible embodiment, a spiral groove 172 is provided on the circumference of the core shaft 171 near the ejector plate 14, and the spiral groove 172 extends along the length direction of the core shaft 171; the rotating core pulling member 17 also includes a guide screw 173, one end of the guide screw 173 is fixedly connected to the ejector plate 14, and the other end extends into the spiral groove 172, and the guide screw 173 is slidably arranged in the spiral groove 172, and the ejector plate 14 is used to drive the guide screw 173 to move along the vertical direction 192 so that the guide screw 173 slides in the spiral groove 172 and drives the core shaft 171 to rotate.

[0030] In this embodiment, the injection mold 1 for molding a cylindrical plastic product with an inner spiral blade supports the side wall of the spiral groove 172 through the guide screw 173 so that the core shaft 171 rotates on the fixed plate 13. The core shaft 171 rotates to demold the spiral blade 22 of the plastic product 2 to optimize the rotary core pulling structure.

[0031] In a possible embodiment, the rotary core-pulling member 17 further includes a guide sleeve 174, a guide hole is formed in the middle of the guide sleeve 174, and the core shaft 171 is rotatably disposed in the guide hole. The circumference of the guide sleeve 174 is fixedly connected to the ejector plate 14, the inner wall of the guide sleeve 174 corresponds to the circumference of the core shaft 171, and the guide screw 173 penetrates the guide sleeve 174 in the radial direction and extends into the spiral groove 172.

[0032] In this embodiment, the guide screw 173 is subjected to a relatively large reaction force from the side wall of the spiral groove 172. The guide screw 173 is fixedly disposed on the guide sleeve 174. The guide sleeve 174 is used to guide the guide screw 173 to reduce the force deformation of the guide screw 173, so that the guide screw 173 is stably matched with the spiral groove 172, and the stability of the guide screw sliding in the spiral groove 172 and driving the core shaft 171 to rotate is achieved, so as to achieve the effect of optimizing the rotating core pulling structure.

[0033] In a possible implementation manner, at least two guide screws 173 are provided, and the guide screws 173 are evenly distributed around the core shaft 171 .

[0034] In this embodiment, the guide screws 173 are evenly distributed around the core shaft 171, and two or more guide screws 173 jointly resist the side walls of the spiral groove 172, so that the core shaft 171 is evenly stressed, which is beneficial to the stability of the screws sliding in the spiral groove 172 and driving the core shaft 171 to rotate, thereby achieving the effect of optimizing the rotating core pulling structure.

[0035] In a possible implementation, the push plate 151 is provided with a slide groove 152 , the slide groove 152 extends along the horizontal direction 191 , the side core pulling block 164 is slidably provided in the slide groove 152 , and the side core pulling block 164 corresponds to the bottom wall of the slide groove 152 .

[0036] In this embodiment, the side core pulling block 164 is slidably disposed in the slide groove 152 along the horizontal direction 191, and the push plate 151 moves along the vertical direction 192 to drive the side core pulling block 164 to move along the vertical direction 192 relative to the slider 161. The slider 161 supports the side core pulling block 164 so that the side core pulling block 164 moves horizontally, thereby the side core pulling block 164 is disengaged from the side hole 21 of the plastic product 2.

[0037] In a possible embodiment, the side core pulling block 164 is provided with a through hole 165, and the through hole 165 is arranged along a direction inclined to the vertical direction 192; the slider 161 includes a connecting portion 162 and a sliding portion 163, the connecting portion 162 extends along the vertical direction 192, one end of the connecting portion 162 is fixedly connected to the fixed plate 13, and the other end is integrally connected to the sliding portion 163, and the sliding portion 163 extends into the through hole 165 along a direction inclined to the vertical direction 192.

[0038] Please combine Figure 7As shown, in this embodiment, when the push plate 151 moves along the vertical direction 192 to drive the side core pulling block 164 to move relative to the slider 161 along the vertical direction 192, the side wall of the through hole 165 contacts the sliding portion 163 of the slider 161, and the sliding portion 163 of the slider 161 presses against the side core pulling block 164 along the horizontal direction 191 so that the side core pulling block 164 moves away from the side hole 21 of the plastic product 2 along the horizontal direction 191, thereby demolding the side core pulling block 164 from the side hole 21 of the plastic product 2.

[0039] In a possible implementation manner, a boss 166 is provided on the peripheral surface of the side core-pulling block 164 close to the plastic product 2 , and the boss 166 is used to form the side hole 21 of the plastic product 2 .

[0040] In this embodiment, the boss 166 is annular. When the mold is closed, the boss 166 fits against the circumference of the core shaft 171, so that the side hole 21 of the plastic product 2 is connected with the opening 23.

[0041] In a possible implementation, the push member 15 further includes a spring 154 . The spring 154 is sleeved on the circumference of the push rod 153 . One end of the spring 154 is connected to the fixing plate 13 , and the other end of the spring 154 is connected to the ejector plate 14 .

[0042] In this embodiment, when the mold is opened, the ejector plate 14 is forced to move upward and compress the spring 154, and the ejector plate 14 moves the push plate 151 upward so that the side core-pulling block 164 is demolded from the side hole 21 of the plastic product 2; at the same time, the ejector plate 14 drives the guide screw 173 to move upward, so that the guide screw 173 abuts against the side wall of the spiral groove 172 so that the core shaft 171 rotates on the fixed plate 13, and the core shaft 171 rotates and demolds the spiral sheet 22 of the plastic product 2. After the product is demolded, the ejector plate 14 is reset by the spring 154, so that the ejector plate 14 reciprocates through the spring 154 to optimize the rotary core-pulling structure.

[0043] In a possible embodiment, the injection mold 1 for molding a cylindrical plastic product with an inner spiral blade also includes a mold opening mechanism 18, which is arranged on the side of the push plate 151. The mold opening mechanism 18 is used to separate the push plate 151 from the fixed plate 13 after the mother mold is opened.

[0044] In this embodiment, the injection mold 1 used to form a cylindrical plastic product with an inner spiral blade sets the mold opening sequence through the mold opening mechanism 18. After the male mold is separated from the female mold, the ejector plate 14 can push the push plate 151 upward to separate the push plate 151 from the fixed plate 13. The push plate 151 moves upward to demold the side core block 164 from the side hole 21 of the plastic product 2.

[0045] In a possible implementation, the bottom plate 11 is provided with a through hole 111 , and the through hole 111 corresponds to the bottom surface of the ejector plate 14 . The through hole 111 is used to pass an ejector rod so that the ejector rod pushes the ejector plate 14 to move.

[0046] In this embodiment, when the mold is opened, the ejector rod pushes the ejector plate 14 upward, so that the ejector plate 14 is forced to move upward and compress the spring 154, and the ejector plate 14 moves the push plate 151 upward so that the side core-pulling block 164 is demolded from the side hole 21 of the plastic product 2; at the same time, the ejector plate 14 drives the guide screw 173 to move upward, so that the guide screw 173 abuts against the side wall of the spiral groove 172 so that the core shaft 171 rotates on the fixed plate 13, and the core shaft 171 rotates and demolds the spiral sheet 22 of the plastic product 2. After the product is demolded, the ejector rod moves downward, the spring 154 restores its elastic deformation, and the spring 154 pushes the ejector plate 14 to reset, so that the ejector plate 14 reciprocates through the spring 154 to optimize the rotary core-pulling structure.

[0047] In summary, the ejector plate 14 of the injection mold 1 for molding a cylindrical plastic product with an inner spiral blade provided in the present embodiment pushes the push plate 151 along the vertical direction 192 through the push rod 153, and the push plate 151 moves the side core pulling block 164 along the vertical direction 192, so that the side core pulling block 164 slides along the slider 161, and the side core pulling block 164 is separated from the side hole 21 of the plastic product 2 along the horizontal direction 191; and, the ejector plate 14 cooperates with the circumferential surface of the core shaft 171, and the ejector plate 14 moves along the vertical direction 192 and drives the core shaft 171 to rotate, thereby demolding the inner wall of the plastic product 2. Such an arrangement enables the injection mold 1 for molding a cylindrical plastic product with an inner spiral blade to complete the linkage between the demolding action and the mold opening action of the plastic product 2 without the aid of an oil cylinder or a motor drive, so as to optimize the rotary core pulling structure.

[0048] The above implementation modes are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred implementation modes, a person skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An injection mold for molding a cylindrical plastic product with an inner spiral blade, characterized in that: include: Base plate; A fixing plate, spaced apart from the bottom plate along a vertical direction; an ejector plate, movably disposed between the bottom plate and the fixing plate along the vertical direction; A push piece, comprising a push plate and a push rod, wherein the push plate is arranged on a side of the fixed plate opposite to the ejector plate, one end of the push rod is fixedly connected to the push plate, and the other end of the push rod is fixedly connected to the ejector plate; A side core-pulling member, comprising a slider and a side core-pulling block, wherein the side core-pulling block is movably arranged on the push plate along the horizontal direction, and the side core-pulling block is used to form the side hole of the plastic product, one end of the slider is fixedly connected to the fixed plate, and the other end is slidably connected to the side core-pulling block, and the slider is used to guide the side core-pulling block to move horizontally; The rotating core-pulling component includes a core shaft, the middle part of which is rotatably connected to the fixed plate, one end of the core shaft extends into the ejector plate, and the other end extends into the side core-pulling block, the ejector plate can be forced to move along the vertical direction and drive the side core-pulling block to separate from the side hole of the plastic product, and the ejector plate can be forced to move along the vertical direction and drive the core shaft to rotate so that the inner wall of the plastic product located at the side core-pulling block is demoulded.

2. The injection mold for molding a cylindrical plastic product with an inner spiral blade according to claim 1, characterized in that: The mandrel is provided with a spiral groove on its circumferential surface close to the ejector plate, and the spiral groove extends along the length direction of the mandrel; The rotating core-pulling component also includes a guide screw, one end of which is fixedly connected to the ejector plate and the other end extends into the spiral groove. The guide screw is slidably arranged in the spiral groove, and the ejector plate is used to drive the guide screw to move in the vertical direction so that the guide screw slides in the spiral groove and drives the core shaft to rotate.

3. The injection mold for molding a cylindrical plastic product with an inner spiral blade according to claim 2, characterized in that: The rotary core-pulling component also includes a guide sleeve, the circumference of the guide sleeve is fixedly connected to the ejector plate, the inner wall of the guide sleeve corresponds to the circumference of the core shaft, and the guide screw radially penetrates the guide sleeve and extends into the spiral groove.

4. The injection mold for molding a cylindrical plastic product with an inner spiral blade according to claim 2, characterized in that: At least two guide screws are provided, and the guide screws are evenly distributed around the circumference of the core shaft.

5. The injection mold for molding a cylindrical plastic product with an inner spiral blade according to claim 1, characterized in that: The push plate is provided with a slide groove, the slide groove extends along the horizontal direction, the side core pulling block is slidably arranged in the slide groove, and the side core pulling block corresponds to the bottom wall of the slide groove.

6. The injection mold for molding a cylindrical plastic product with an inner spiral blade according to claim 1, characterized in that: The side core pulling block is provided with a through hole, and the through hole is arranged along a direction inclined to the vertical direction; The slider includes a connecting portion and a sliding portion, the connecting portion extends along the vertical direction, one end of the connecting portion is fixedly connected to the fixing plate, and the other end is integrally connected to the sliding portion, and the sliding portion extends into the through hole along a direction inclined to the vertical direction.

7. The injection mold for molding a cylindrical plastic product with an inner spiral blade according to claim 1, characterized in that: The side core-pulling block is provided with a boss near the peripheral surface of the plastic product, and the boss is used to form the side hole of the plastic product.

8. The injection mold for molding a cylindrical plastic product with an inner spiral blade according to claim 7, characterized in that: The push piece also includes a spring, which is sleeved on the circumference of the push rod, one end of the spring is connected to the fixing plate, and the other end is connected to the ejector plate.

9. The injection mold for molding a cylindrical plastic product with an inner spiral blade according to claim 1, characterized in that: It also includes a mold opening mechanism, which is arranged on the side of the push plate and is used to separate the push plate from the fixed plate after the mother mold is opened.

10. The injection mold for molding a cylindrical plastic product with an inner spiral blade according to claim 1, characterized in that: The bottom plate is provided with a through hole, the through hole corresponds to the bottom surface of the ejector plate, and the through hole is used to pass the ejector rod so that the ejector rod pushes against the ejector plate to move.

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