CN111716630B

CN111716630B - Injection molding device of plastic pipe clamp

Info

Publication number: CN111716630B
Application number: CN202010571173.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuhu Futian Electronic Technology Co ltd
Current assignee: Wuhu Futian Electronic Technology Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-11-16
Anticipated expiration: 2040-06-22
Also published as: CN111716630A

Abstract

The invention discloses an injection molding device of a plastic pipe clamp, and relates to the technical field of injection molding equipment. According to the invention, the filling mechanism is arranged, so that the size of the pouring gate is changed, the flow state of molten glue is kept consistent in the front and back injection molding processes of the transition section, and the flow marks are avoided; in the injection molding process of which the size of the sprue is changed from small to large, the molten glue flowing through the pouring gate cannot always maintain higher impact pressure, so that the quality of an injection molded part product is ensured, the mold has longer service life, bubbles accumulated on the inner side wall of the heating gun barrel can be separated, and the air is prevented from entering the cavity to cause the inner part or the surface of the injection molded part product to generate a cavity; through setting up and filling mechanism matched with demoulding mechanism, reduce its adhesive force with the mould, it is easier to have realized the drawing of patterns, and the purpose that the deformation can not appear in the injection molding product and damage even.

Description

Injection molding device of plastic pipe clamp

Technical Field

The invention relates to the technical field of injection molding equipment, in particular to an injection molding device of a plastic pipe clamp.

Background

Compared with other types of injection molding equipment, the vertical injection molding machine has the advantages of low gravity center, small occupied area, convenience in taking and discharging by a manipulator, easiness in insert molding and the like, so that some small-specification injection molding part products are commonly subjected to injection molding.

I find that the existing injection molding device still has the following disadvantages in the process of using the injection molding machine to perform injection molding on the plastic pipe clamp for a long time: firstly, the size of a pouring gate is designed according to the condition of a product, the size cannot be changed after a mould is processed, when a plastic pipe is clamped in the injection molding process and is filled to an internal thread part, molten glue can be shunted, part of molten glue is transversely filled into a thread part structure, and other part of molten glue is still longitudinally filled to the appearance surface of the product, so that the amount of transversely flowing glue is reduced, and therefore, the flow mark problem can be caused at the transition section part due to the change of the flowing state of the molten glue; secondly, when a sprue of a single-specification mold is used for a long time, the sprue is gradually enlarged due to small stress area and strong pressure, so that an injection molding part cannot be rapidly molded in a cavity, and a wire drawing phenomenon exists after the mold is opened; and thirdly, the adhesion force of the injection molded part after molding is strong, and the ejection mechanism can often generate the phenomena of deformation or damage of the injection molded product and the like during unloading.

Disclosure of Invention

The invention aims to provide an injection molding device of a plastic pipe clamp, which aims to overcome the defects caused in the prior art.

The utility model provides a device of moulding plastics of plastics pipe clamp, includes the base, moulds plastics the lower mould, moulds plastics the mould, filling mechanism and demoulding mechanism, the lower mould of moulding plastics is fixed in the upper end of base through the fixed plate, the internally mounted of base has the cylinder, the thimble is installed to the output of cylinder, and the upper end of base is fixed with two oil cylinder one that the symmetry set up in the both sides of fixed plate, two the output of oil cylinder one is connected with the roof, the roof slides through the guide pillar that a plurality of symmetry set up and sets up in the top of base, the lower extreme of roof through the pull rod that a plurality of symmetry set up with mould plastics and link to each other, filling mechanism installs in the upper end of roof to be used for adjusting the runner size and fill the plastics fuse-element, demoulding mechanism installs on mould plastics and mould plastics the lower mould and be used for strike the lower mould of moulding plastics and accomplish the drawing of injection molding.

Preferably, the filling mechanism comprises a first driving motor, a second oil cylinder, a material cylinder and a rotating part, two symmetrically arranged supporting plates are fixed at the upper end of the top plate, a mounting table is fixed at the upper ends of the two supporting plates, the two oil cylinders are symmetrically arranged on the mounting table respectively, a mounting frame is connected to the output end of the second oil cylinder, the first driving motor is arranged on the mounting frame, the output end of the first driving motor is connected with a spiral material rod, the material cylinder is also arranged on the mounting frame, the lower end of the material cylinder is connected with a heating barrel through a connecting pipe, the spiral material rod is arranged in the heating barrel, the upper part and the lower part of the side end of the heating barrel are respectively fixed on the mounting table and the top plate, a plurality of uniformly distributed heating rings are arranged between the mounting table and the top plate at the side end of the heating barrel, an injection nozzle is arranged at the lower end of the heating barrel in a sliding and sealing manner, and an installation part is further arranged at the side end of the heating barrel in a sliding manner, the both ends of installation department are fixed in on the roof, and the side of heating barrel still is fixed with the fixed block that two symmetries set up in the below of installation department, it is equipped with the traveller to slide on the fixed block, the cover is equipped with the spring between fixed block and installation department on the traveller, driving motor two is installed on the installation department and its output coaxial coupling has gear one and gear two, gear one meshes has the ring gear, rotate in the piece is fixed in the ring gear, has seted up runner one and runner two on the rotation piece.

Preferably, the demolding mechanism comprises an upper die holder, a third driving motor, a third oil cylinder and an embedded screw rod, the upper die holder is fixed at the upper end of the injection upper die, a third sprue and a rotating groove are formed in the upper die holder, the side end of the upper die holder is connected with a rotating rod through a bearing, the upper end of the rotating rod is connected with a third gear, the middle of the rotating rod is connected with a positioning plate in a sliding manner, the side end of the positioning plate is fixed on the side end of the injection upper die, a C-shaped striking rod is fixed at the lower end of the rotating rod, a striking block is fixed at the end of the striking rod, a plurality of guide sleeves which are symmetrically arranged are fixed at the lower end of the upper die holder, guide rods are arranged in the guide sleeves in a sliding manner, the lower ends of the guide rods are fixed on the injection lower die, the third oil cylinder is installed at the side end of the injection lower die, a mounting bar is fixed at the output end of the third oil cylinder, the third driving motor is installed on the mounting bar, and the side end of the injection lower die is also connected with the mounting bar in a sliding manner, and one end of the embedded screw rod is arranged in the injection lower die in a threaded manner, and the other end of the embedded screw rod is fixed with the output end of the driving motor III.

Preferably, a plurality of uniformly distributed cold flow pipes are arranged on the side of the injection molding cavity in the injection molding lower die.

Preferably, the gear III is meshed with the gear II, and the rotating groove is matched with the lower end of the rotating piece.

Preferably, the striking block is made of plastic, the embedded screw is of two sections, the thread directions of the embedded screw are the same, and the diameter of the inner section of the embedded screw is smaller than that of the outer section of the embedded screw.

The invention has the advantages that: (1) by arranging the filling mechanism, the output end of an internal driving motor II drives the gear ring and the rotating piece to synchronously rotate through the gear I, so that the lower end of the injection nozzle is clamped to the sprue I from the sprue II, the change of the dimension of the sprue is realized, the part with the threaded structure in the lower injection molding die in the cavity is subjected to injection molding by adopting a runner with a smaller sprue dimension, then, the part starts to be changed from the parting surface to be subjected to injection molding by adopting a runner with a larger sprue dimension, the molten rubber flow state is kept consistent in the front and back injection molding processes of the transition section, and the occurrence of flow marks is avoided;

(2) in the injection molding process of which the size of the pouring gate is changed from small to large, the molten glue flowing through the pouring gate cannot always maintain higher impact pressure, the condition of gate size change caused by long-time use of a fixed-specification pouring gate can be avoided, the quality of an injection molded part product is ensured, meanwhile, the mold has longer service life, and the lower end of the injection nozzle can vibrate under the elastic force action of a spring in the clamping process from the pouring gate II to the pouring gate I, so that bubbles accumulated on the inner side wall of the heating gun barrel can be separated, and the phenomenon that air enters a cavity to cause the occurrence of cavities in the injection molded part product or on the surface of the injection molded part product is avoided;

(3) through setting up and filling mechanism matched with demoulding mechanism, after injection moulding finishes, the non-opening part of rotation piece lower extreme rotates to the position with runner three-phase complex, form the shutoff effect to the inside melten gel of die cavity, this rotation process still drives gear trisynchronous rotation, drive through bull stick and knockout pin again and strike the piece and beat to the outer terminal surface of the lower mould of moulding plastics, make the injection molding after the shaping form the vibration in the die cavity, reduce its adhesive force with the mould, it is easier to have realized the drawing of patterns, and the purpose of deformation or even damage can not appear in the injection molding product.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the filling mechanism of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an assembly view showing a partial structure of the filling mechanism of the present invention.

Fig. 5 is an assembly view of the demolding mechanism and the injection mold of the present invention.

FIG. 6 is a schematic view of the structure of the embedded screw of the present invention.

FIG. 7 is a schematic view of the internal structure of the injection mold of the present invention.

FIG. 8 is a schematic structural view of a lower injection mold according to the present invention.

FIG. 9 is a schematic view of the structure of the ejector part of the present invention.

FIG. 10 is a schematic view of an injection molded article product of the present invention.

Wherein, 1-base, 2-injection molding lower die, 3-injection molding upper die, 4-filling mechanism, 5-demoulding mechanism, 6-fixing plate, 7-air cylinder, 8-thimble, 9-oil cylinder I, 10-top plate, 11-guide pillar, 12-pull rod, 13-cold flow tube, 401-driving motor I, 402-driving motor II, 403-oil cylinder II, 404-material cylinder, 405-rotating part, 406-supporting plate, 407-mounting table, 408-mounting frame, 409-spiral material rod, 410-connecting pipe, 411-heating barrel, 412-heating ring, 413-injection nozzle, 414-mounting part, 415-fixing block, 416-slide pillar, 417-spring, 418-gear I, 419-gear II, 420-gear ring, 421-sprue I, 422-sprue II, 501-upper die holder, 502-driving motor III, 503-oil cylinder III, 504-embedded screw, 505-sprue III, 506-rotating groove, 507-bearing, 508-rotating rod, 509-gear III, 510-positioning plate, 511-striking rod, 512-striking block, 513-guide sleeve, 514-guide rod, 515-mounting bar and 516-guide rod.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 10, an injection molding device for a plastic pipe clamp comprises a base 1, a lower injection molding die 2, an upper injection molding die 3, a filling mechanism 4 and a demolding mechanism 5, wherein the lower injection molding die 2 is fixed at the upper end of the base 1 through a fixing plate 6, a cylinder 7 is installed inside the base 1, an ejector 8 is installed at the output end of the cylinder 7, two symmetrically arranged cylinders 9 are fixed at the upper end of the base 1 on two sides of the fixing plate 6, the output ends of the two cylinders 9 are connected with a top plate 10, the top plate 10 is slidably arranged above the base 1 through a plurality of symmetrically arranged guide pillars 11, the lower end of the top plate 10 is connected with the upper injection molding die 3 through a plurality of symmetrically arranged pull rods 12, the filling mechanism 4 is installed at the upper end of the top plate 10 and is used for adjusting the size of a sprue to fill plastic melt, the demolding mechanism 5 is installed on the upper injection molding die 3 and the lower injection molding die 2, and is used for knocking the injection lower die 2 to complete the demoulding of the injection molding piece.

In this embodiment, the filling mechanism 4 includes a first driving motor 401, a second driving motor 402, a second oil cylinder 403, a barrel 404 and a rotating member 405, two symmetrically disposed support plates 406 are fixed to the upper end of the top plate 10, a mounting table 407 is fixed to the upper ends of the two support plates 406, two oil cylinders 403 are symmetrically mounted on the mounting table 407, a mounting frame 408 is connected to the output end of the second oil cylinder 403, the first driving motor 401 is mounted on the mounting frame 408, and a screw rod 409 is connected to the output end of the first driving motor 401, the barrel 404 is also mounted on the mounting frame 408, the lower end of the barrel 404 is connected to a heating barrel 411 through a connecting pipe 410, the screw rod 409 is disposed in the heating barrel 411, the upper portion and the lower portion of the side end of the heating barrel 411 are fixed to the mounting table 407 and the top plate 10, a plurality of uniformly distributed heating rings 412 are disposed between the mounting table 407 and the top plate 10 at the side end of the heating barrel 411, the lower extreme of heating barrel 411 slides and seals and is equipped with injection nozzle 413, still slides on the side of heating barrel 411 and is equipped with installation department 414, the both ends of installation department 414 are fixed in on roof 10, and the side of heating barrel 411 still is fixed with the fixed block 415 that two symmetries set up in the below of installation department 414, it is equipped with traveller 416 to slide on the fixed block 415, the cover is equipped with spring 417 on traveller 416 between fixed block 415 and installation department 414, two 402 of driving motor install on installation department 414 and its output coaxial coupling have gear 418 and two 419, the meshing of one 418 of gear has ring 420, rotate the piece 405 and be fixed in ring 420, rotate and seted up runner 421 and two 422 on the piece 405.

It should be noted that the spring 417 is a high-strength spring, which ensures that the lower port of the injection nozzle 413 is always tightly attached to the end surface of the rotating member 405, the second gate 422 and the first gate 421 during the rotation of the rotating member 405.

In this embodiment, the demolding mechanism 5 includes an upper mold base 501, a third driving motor 502, a third oil cylinder 503 and an embedded screw 504, the upper mold base 501 is fixed at the upper end of the injection molding upper mold 3, a third sprue 505 and a rotating groove 506 are formed in the upper mold base 501, a rotating rod 508 is connected to a side end of the upper mold base 501 through a bearing 507, a third gear 509 is connected to an upper end of the rotating rod 508, a positioning plate 510 is slidably connected to a middle portion of the rotating rod 508, a side end of the positioning plate 510 is fixed at a side end of the injection molding upper mold 3, a C-shaped striking rod 511 is fixed at a lower end of the rotating rod 508, a striking block 512 is fixed at an end of the striking rod 511, a plurality of guide sleeves 513 symmetrically arranged are fixed at a lower end of the upper mold base 501, a guide rod 514 is slidably arranged in the guide sleeves 513, a lower end of the guide rod 514 is fixed on the injection molding lower mold 2, the third oil cylinder 503 is installed at a side end of the injection lower mold 2, and a bar 515 is fixed at an output end of the third oil cylinder 503, the third driving motor 502 is mounted on the mounting bar 515, the side end of the injection molding lower die 2 is further connected with the mounting bar 515 in a sliding mode through the guide rod 516, one end of the embedded screw 504 is arranged in the injection molding lower die 2 in a threaded mode, and the other end of the embedded screw 504 is fixed to the output end of the third driving motor 502.

In this embodiment, a plurality of uniformly distributed cold flow pipes 13 are arranged on the side of the injection molding cavity in the injection molding lower die 2, so that the purpose of accelerating the cooling molding of the injection molding in the cavity is achieved.

It should be noted that the third gear 509 is meshed with the second gear 419, the rotating slot 506 is engaged with the lower end of the rotating member 405, and the first driving motor 401, the second driving motor 402 and the third driving motor 502 are all servo motors.

In addition, the striking block 512 is made of plastic, and does not damage the surface of the injection molding lower die 2 in the striking process, the embedded screw 504 is of a two-section type, the thread directions of the embedded screw 504 are the same, the rod diameter of the inner section is smaller than that of the outer section, when the inner section of the embedded screw 504 is placed in the cavity, the rear part of the outer section of the embedded screw 504 and the injection molding lower die 2 can form a sealed environment, and when unloading is performed, the end surface of the inner section of the embedded screw 504 moves out of the cavity but cannot move out of the injection molding lower die 2.

The working process and principle are as follows: during the use of the invention, firstly, plastic rice quantitatively enters a heating barrel 411 from a charging barrel 404 through a connecting pipe 410, a driving motor I401 is started, an output end of the driving motor I drives a spiral material rod 409 to rotate in the heating barrel 411, downward thrust is generated on the plastic rice and pushes the plastic rice to the heating ring 412 part, a second oil cylinder 403 is started, an output end of the second oil cylinder 403 moves downwards, molten glue which is heated and melted and plasticized by the heating ring 412 is extruded into a mold cavity through an injection nozzle 413 at the lower end of the heating barrel 411 and a gate II 422 with smaller specification and size, so as to firstly fill the bottom of an unthreaded structure of an injection molding piece, when the part with the threaded structure can be filled according to the specification and size of the injection molding piece product, a driving motor II 402 is started when the molten glue fills a transition section, an output end of the driving motor II 420 and a rotating piece 405 to synchronously rotate through a gear I418, the gate II 422 with smaller size is adjusted to be the gate I421 with larger size, the flow rate of the molten rubber is accelerated, so that the flow of the molten rubber in unit time is increased, the molten rubber keeps the original flowing state after being divided, and the flow mark generated by the transition section is eliminated;

after the part with the threaded structure is filled, the driving motor II 402 is started reversely again to fill the part without the threaded structure at the upper end, so that the stable flowing state of the molten rubber is further ensured, the lower end of the injection nozzle 413 is always kept in tight clamping connection with the rotating piece 405 under the elastic action of the spring 417 in the rotating process, the molten rubber is prevented from leaking out from the position of the port, the up-and-down vibration of the injection nozzle 413 can separate bubbles accumulated on the inner wall of the heating gun barrel 411, and the separated bubbles are upwards moved and discharged through the upper port of the heating gun barrel 411;

the rotation process of the first gear 418 can also synchronously drive a second gear 419 coaxially fixed at the lower end to rotate, then the striking block 512 arranged at the end part is driven by a third gear 509, a rotating rod 508 and a striking rod 511 to strike the side end face of the lower injection mold 2 so as to form a vibration effect on an injection molded part product in the cavity, the attachment degree of the injection molded part product with the mold cavity is reduced, the ejection and the unloading are more convenient, then the first oil cylinder 9 is started, the output end of the first oil cylinder is pulled by a pull rod 12 to move upwards through the upper injection mold 3, then the driving motor third 502 and the oil cylinder third 503 are started to drive the embedded screw 504 to move towards the outer side of the lower injection mold 2, finally the air cylinder 7 is started, the output end of the air cylinder is used for driving a thimble 8 to eject the molded injection molded part from the mold cavity, and then the mechanical arm is taken out.

Based on the above, by arranging the filling mechanism 4, the output end of the internal driving motor II 402 drives the gear ring 420 and the rotating part 405 to synchronously rotate through the gear I418, so that the lower end of the injection nozzle 413 is respectively clamped to the gate I421 from the gate II 422, thereby realizing the change of the gate size, enabling the part with the thread structure in the injection lower die 2 in the cavity to adopt the runner with the smaller gate size for injection molding, then changing from the parting surface to the runner with the larger gate size for injection molding, ensuring that the melt adhesive flow state is kept consistent in the front and back injection molding processes of the transition section part, and avoiding the occurrence of flow marks;

in the injection molding process of which the size of the pouring gate is changed from small to large, the molten glue flowing through the pouring gate cannot always maintain higher impact pressure, the condition that the size of the pouring gate is changed when the pouring gate with fixed specification is used for a long time can be avoided, the quality of an injection molded part product is ensured, meanwhile, the mold has longer service life, and the lower end of the injection nozzle 413 can vibrate under the elastic force action of the spring 417 in the clamping process from the pouring gate II 422 to the pouring gate I421, so that bubbles accumulated on the inner side wall of the heating gun barrel 411 can be separated, and the phenomenon that air enters the cavity to cause the inside or the surface of the injection molded part product to generate holes is prevented;

through setting up and filling 4 matched with demoulding mechanism 5 of mechanism, after injection moulding finishes, the part that does not open at rotation piece 405 lower extreme rotates to the position with three 505 matched with in runner, form the shutoff effect to the inside melten gel of die cavity, this rotation process still drives the synchronous rotation of three 509 gears, it strikes the piece 512 to the outer terminal surface of mould 2 down of moulding plastics to drive to strike through bull stick 508 and knockout pin 511 again, make the injection molding after the shaping form the vibration in the die cavity, reduce its adhesive force with the mould, it is easier to have realized the drawing of patterns, and the purpose that the injection molding product can not appear deformation or even damage.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims

1. An injection molding device of a plastic pipe clamp is characterized by comprising a base (1), an injection molding lower die (2), an injection molding upper die (3), a filling mechanism (4) and a demolding mechanism (5), wherein the injection molding lower die (2) is fixed at the upper end of the base (1) through a fixing plate (6), a cylinder (7) is arranged inside the base (1), an ejector pin (8) is arranged at the output end of the cylinder (7), two symmetrically arranged oil cylinders (9) are fixed at the two sides of the fixing plate (6) at the upper end of the base (1), the output ends of the two oil cylinders (9) are connected with a top plate (10), the top plate (10) is arranged above the base (1) in a sliding manner through a plurality of symmetrically arranged guide pillars (11), the lower end of the top plate (10) is connected with the injection molding upper die (3) through a plurality of symmetrically arranged pull rods (12), the filling mechanism (4) is arranged at the upper end of the top plate (10) and used for adjusting the size of a sprue to fill plastic melt, the demolding mechanism (5) is arranged on the injection upper die (3) and the injection lower die (2) and used for knocking the injection lower die (2) to complete demolding of injection molded parts, the filling mechanism (4) comprises a driving motor I (401), a driving motor II (402), an oil cylinder II (403), a material cylinder (404) and a rotating part (405), two symmetrically-arranged supporting plates (406) are fixed at the upper end of the top plate (10), mounting tables (407) are fixed at the upper ends of the two supporting plates (406), the two oil cylinders II (403) are respectively and symmetrically arranged on the mounting tables (407), a mounting frame (408) is connected to the output end of the oil cylinder II (403), the driving motor I (401) is arranged on the mounting frame (408) and the output end of the driving motor I (401) is connected with a spiral material rod (409), the feed cylinder (404) is also installed on an installation frame (408), the lower end of the feed cylinder (404) is connected with a heating barrel (411) through a connecting pipe (410), a spiral material rod (409) is arranged in the heating barrel (411), the upper part and the lower part of the side end of the heating barrel (411) are respectively fixed on an installation table (407) and a top plate (10), a plurality of uniformly distributed heating rings (412) are arranged between the installation table (407) and the top plate (10) at the side end of the heating barrel (411), an injection nozzle (413) is arranged at the lower end of the heating barrel (411) in a sliding and sealing manner, an installation part (414) is further arranged at the side end of the heating barrel (411) in a sliding manner, two symmetrically arranged fixing blocks (415) are further fixed at the lower part of the installation part (414) at the two ends of the installation part (414), and sliding columns (416) are arranged on the fixing blocks (415), the mold stripping device is characterized in that a spring (417) is sleeved between a fixed block (415) and an installation part (414) on the sliding column (416), a second driving motor (402) is installed on the installation part (414) and the output end of the second driving motor is coaxially connected with a first gear (418) and a second gear (419), the first gear (418) is meshed with a gear ring (420), a rotating part (405) is fixed in the gear ring (420), a first gate (421) and a second gate (422) are arranged on the rotating part (405), the mold stripping mechanism (5) comprises an upper mold base (501), a third driving motor (502), a third oil cylinder (503) and an embedded screw (504), the upper mold base (501) is fixed at the upper end of an injection molding upper mold (3), the third gate (505) and a rotating groove (506) are arranged on the upper mold base (501), the side end of the upper mold base (501) is connected with a rotating rod (508) through a bearing (507), and the upper end of the rotating rod (508) is connected with a third gear (509), the middle part of the rotating rod (508) is connected with a positioning plate (510) in a sliding manner, the side end of the positioning plate (510) is fixed on the side end of the injection molding upper die (3), the lower end of the rotating rod (508) is fixed with a C-shaped striking rod (511), the end part of the striking rod (511) is fixed with a striking block (512), the lower end of the upper die base (501) is fixed with a plurality of guide sleeves (513) which are symmetrically arranged, guide rods (514) are arranged in the guide sleeves (513) in a sliding manner, the lower end of the guide rods (514) is fixed on the injection molding lower die (2), the oil cylinder three (503) is arranged at the side end of the injection molding lower die (2), the output end of the oil cylinder three (503) is fixed with a mounting bar (515), the driving motor three (502) is arranged on the mounting bar (515), the side end of the injection molding lower die (2) is also connected with the mounting bar (515) in a sliding manner through the guide rod (516), and one end of the embedding screw rod (504) is arranged in the injection molding lower die (2), the other end of the embedded screw rod (504) is fixed with the output end of the driving motor III (502).

2. An injection molding apparatus for a plastic pipe clamp as claimed in claim 1, wherein: and a plurality of uniformly distributed cold flow pipes (13) are arranged on the side of the injection molding cavity in the injection molding lower die (2).

3. An injection molding apparatus for a plastic pipe clamp as claimed in claim 1, wherein: the third gear (509) is meshed with the second gear (419), and the rotating groove (506) is matched with the lower end of the rotating piece (405).

4. An injection molding apparatus for a plastic pipe clamp as claimed in claim 1, wherein: the striking block (512) is made of plastic, the embedded screw (504) is of two sections, the thread directions of the two sections are the same, and the rod diameter of the inner section is smaller than that of the outer section.