Downward blowing device with function of automatically clamping and releasing insert

Abstract

The utility model discloses a down-blowing device with automatic clamping and releasing functions for inserts, and belongs to the technical field of blow molding devices. Comprising a pull-down acting cylinder supporting plate and a pull-down acting cylinder, and the pull-down acting cylinder is fixed to the upward side of the pull-down acting cylinder supporting plate; the insert mounting bracket is fixed with the upper end of the pull-down acting cylinder column; a group of insert clamping jaws are formed at the upper end of the insert clamping jaw pipe, and a clamping jaw tensioning groove is formed between every two adjacent insert clamping jaws; the lower air blowing pipe lifting acting cylinder is fixed to the lower end of the pull-down acting cylinder column, the lower end of the lower air blowing pipe extends into the lower air blowing pipe guide sleeve and is connected with the upper end of the lower air blowing pipe lifting acting cylinder column, and the upper end of the lower air blowing pipe lifting acting cylinder column forms a horn-mouth-shaped air outlet head. And the outer wall of the horn-mouth-shaped air outlet head is matched with or released from the group of insert clamping claws. The mold has the advantages that the mold insert can be reliably combined with the opening part of the plastic hollow container, and the mold insert and the formed hollow plastic container can be conveniently taken away after blowing is completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of blow molding devices, and in particular relates to a down-blowing device with the functions of automatically clamping and releasing inserts. Background Art

[0002] The aforementioned down-blowing device is a device used for molding plastic hollow containers. This device is designed to meet the requirements of the inflation molding process for the billet (molten billet) and realizes the molding of the plastic hollow container through specific mechanisms and components, such as the support seat, the push plate lifting cavity, the guide sleeve seat, the down-blowing seat and cavity, the down-blowing seat lifting mechanism, the guide column, the blowing needle mechanism, etc.

[0003] As the industry knows, many hollow plastic containers, such as those used to store pressurized permanent gases, liquefied gases, and dissolved gases, have relatively small mouths but large volumes, placing extremely stringent demands on mouth strength and sealing. Examples of these permanent gases include oxygen, nitrogen, argon, neon, and krypton, which are gaseous at room temperature with critical temperatures below 10°C; liquefied gases include carbon dioxide, ammonia, freon, liquefied petroleum, and hydrogen chloride; and typical dissolved gases include acetylene, beer, and champagne.

[0004] As mentioned above, due to the relatively small outlets of these hollow containers, they can deform due to shrinkage and other factors after being blown and released from the mold. This can make it difficult for the matching lid to meet the desired sealing effect. If the lid is forced to fit, such as by forcibly screwing it in, the seal between them will be broken, causing leakage during logistics links such as storage and during use, resulting in waste and even harm. Therefore, ensuring the sealing reliability of bottles, barrels, and cans suitable for these applications is a constant concern for hollow plastic container manufacturers.

[0005] A common technique currently used by manufacturers of hollow plastic products is to install an insert at the outlet, or mouth, to both increase strength (prevent deformation) and improve sealing. Specifically, the insert is screwed onto the blow needle, which is then mounted on the blow needle holder. Then, with the two halves of the mold used to blow-form bottles and cans closed, the insert is engaged with the mouth of the container. After the mold is opened, the blow needle is removed along with the product, and the worker removes the blow needle from the insert. This process is repeated for each blow-molded bottle or can, increasing the workload of workers and hindering production efficiency. This necessitated improvements, and the technical solutions described below were developed with this in mind. Utility Model Content

[0006] The task of the utility model is to provide a down-blowing device with the functions of automatically clamping and releasing the insert before and during blowing and automatically releasing it after blow molding, thereby ensuring that the insert is reliably combined with the container mouth.

[0007] The task of the utility model is accomplished in this way: a down-blowing device with the function of automatically clamping and releasing an insert, comprising a down-blowing cylinder supporting plate and a down-blowing cylinder, a down-blowing cylinder column giving way hole is opened in the middle of the down-blowing cylinder supporting plate, the down-blowing cylinder is fixed to the upper side of the down-blowing cylinder supporting plate, and a down-blowing cylinder column cavity is formed in the center of the down-blowing cylinder column of the down-blowing cylinder, which passes through from the upper end to the lower end. The lower end of the down-blowing cylinder column extends to the lower part of the cylinder body of the down-blowing cylinder at a position corresponding to the down-blowing cylinder column giving way hole and then extends downward to the down-blowing cylinder Below the action cylinder support plate, a blowing pipe guide sleeve is fixed at the lower end of the pull-down action cylinder column cavity, and the upper end of the pull-down action cylinder column extends upward toward the upper part of the cylinder body away from the pull-down action cylinder; an insert placement bracket, which is fixed to the upper end of the pull-down action cylinder column, and a insert clamping claw tube clearance hole is formed at the central position of the insert placement bracket, which passes through from the upper end of the insert placement bracket to the lower end; an insert clamping claw tube, at the upper end of the insert clamping claw tube and around the four sides of the insert clamping claw tube, a group of insert clamping claws are formed in a spaced state, and the group of insert clamping claws correspond to the insert placement bracket. The cam is fixed to the bottom of the pull-down cylinder column in a longitudinal cantilevered state, and the lower end of the cam extends into the cam guide sleeve and is connected to the upper end of the cam lifting cylinder column of the cam lifting cylinder, and the upper end of the cam is formed with a bell mouth. shaped air outlet head, the outer wall of the trumpet-shaped air outlet head cooperates with or releases the cooperation with a group of insert clamping claws, and when the lower air pipe is displaced downward by the action of the lower air pipe lifting cylinder, the outer wall of the trumpet-shaped air outlet head cooperates with the group of insert clamping claws and makes a group of insert clamping claws open outward to automatically clamp the insert placed on the insert placement bracket, and when the lower air pipe is displaced upward by the action of the lower air pipe lifting cylinder, the outer wall of the trumpet-shaped air outlet head automatically releases the cooperation with the group of insert clamping claws, and the group of insert clamping claws retract inward to release the clamping of the insert.

[0008] In a specific embodiment of the present invention, the outer wall of the trumpet-shaped air outlet head formed at the upper end of the lower air blowing pipe is formed as an air outlet head inclined surface, and an insert clamping claw inclined surface is formed on the side of the group of insert clamping claws corresponding to the air outlet head inclined surface, and the air outlet head inclined surface cooperates with or releases the cooperation with the insert clamping claw inclined surface, and when the lower air blowing pipe is displaced downwardly under the action of the lower air blowing pipe lifting cylinder, the air outlet head inclined surface cooperates with the insert clamping claw inclined surface to squeeze the insert clamping claw inclined surface outwardly and cause a group of insert clamping claws to open outward, automatically clamping the insert placed on the insert placement bracket; and when the lower air blowing pipe is displaced upwardly under the action of the lower air blowing pipe lifting cylinder and moves upwardly to the extent that the trumpet-shaped air outlet head protrudes from the surface of the side of the group of insert clamping claws facing upward, the air outlet head inclined surface releases the cooperation with the insert clamping claw inclined surface and causes the group of insert clamping claws to return inward.

[0009] In another specific embodiment of the present invention, a cooling medium inlet hole and a cooling medium outlet hole are provided on the pull-down cylinder column of the pull-down cylinder and along the height direction of the pull-down cylinder column. The cooling medium inlet hole and the cooling medium outlet hole are 180° apart from each other in the circumferential direction of the pull-down cylinder column and are communicated with the cooling medium circulation channel provided on the top of the pull-down cylinder column. A cooling medium inlet pipe is provided at the bottom of the pull-down cylinder column and at a position corresponding to the cooling medium inlet hole. A cooling medium inlet pipe fitting is provided at one end of the cooling medium inlet pipe away from the cooling medium inlet hole. A cooling medium outlet pipe is provided at the bottom of the pull-down cylinder column and at a position corresponding to the cooling medium outlet hole. A cooling medium outlet pipe fitting is provided at one end of the cooling medium outlet pipe away from the cooling medium outlet hole. A sealing fit is formed between the middle part of the insert placement bracket and the upper end face of the pull-down cylinder column.

[0010] In another specific embodiment of the present invention, a bracket fixed connector compensation cavity is expanded on the cavity wall of the pull-down action cylinder column and located at the upper end of the cavity wall, and a compensation cavity wall thread is formed on the cavity wall of the bracket fixed connector compensation cavity and around the circumferential direction of the bracket fixed connector compensation cavity, and a bracket fixed connector is formed at the lower end of the insert placement bracket, and a bracket fixed connector external thread is formed on the outer wall of the bracket fixed connector, and the bracket fixed connector external thread is fixed with the compensation cavity wall thread.

[0011] In another specific embodiment of the present invention, a sealing ring groove is provided on the upper end face of the pull-down cylinder column and at positions located on the inner side and the outer side of the cooling medium circulation concave channel, and a pull-down cylinder upper end face sealing ring is embedded in each sealing ring groove, and the bottom surface of the middle part of the insert placement bracket forms a seal with the upper end face sealing ring of the pull-down cylinder, and the pull-down cylinder is fixed to the upper side of the pull-down cylinder support plate by screws, and the pull-down cylinder column slides up and down in a sealing manner with the pull-down cylinder cavity wall of the pull-down cylinder cavity of the pull-down cylinder through the pull-down cylinder column sealing piston, and the pull-down cylinder cavity is divided into two parts located above the pull-down cylinder column sealing piston by the pull-down cylinder column sealing piston. An upper cylinder chamber and a lower cylinder chamber located below the sealing piston of the pull-down cylinder column; a left inlet and outlet through hole and a right inlet and outlet through hole are provided on the pull-down cylinder body of the pull-down cylinder, the left inlet and outlet through hole is communicated with the lower cylinder chamber, and the right inlet and outlet through hole is communicated with the upper cylinder chamber, a left inlet and outlet through hole connecting pipe communicating with the left inlet and outlet through hole is provided at the bottom of the pull-down cylinder and at a position corresponding to the left inlet and outlet through hole, a left inlet and outlet through hole connecting pipe nozzle is provided at the end of the left inlet and outlet through hole connecting pipe away from the left inlet and outlet through hole, a right inlet and outlet through hole connecting pipe communicating with the right inlet and outlet through hole is provided at the bottom of the pull-down cylinder and at a position corresponding to the right inlet and outlet through hole, a right inlet and outlet through hole connecting pipe nozzle is provided at the end of the right inlet and outlet through hole connecting pipe away from the right inlet and outlet through hole.

[0012] In another specific embodiment of the present invention, the pull-down cylinder is an oil cylinder, the left and right inlet and outlet holes are oil holes, the left and right inlet and outlet hole connecting pipes are oil pipes; the upper and lower cylinder chambers are the upper and lower oil chambers of the oil cylinder respectively.

[0013] In a more specific embodiment of the present invention, the upper end of the lower air pipe lifting cylinder column of the lower air pipe lifting cylinder extends upwardly out of the cylinder body and is formed with a lower air pipe connecting sleeve, and the lower air pipe connecting sleeve is inserted into the lower air pipe guide sleeve, and the lower end of the lower air pipe is inserted into the lower air pipe connecting sleeve and is threadedly connected with the lower air pipe connecting sleeve, and a cylinder column vent is provided at the central position of the lower air pipe lifting cylinder column and along the height direction of the lower air pipe lifting cylinder column. The cylinder column vent is communicated with the lower air pipe airway opened at the central position of the lower air pipe and passing through the height direction of the lower air pipe, the middle part of the lower air pipe lifting cylinder column is located in the lower air pipe lifting cylinder cavity of the lower air pipe lifting cylinder and is provided with a lower air pipe lifting cylinder column sealing piston, and the lower air pipe lifting cylinder is sealed by the lower air pipe lifting cylinder column sealing piston The air filter presses on the cam and is connected with the air filter press, and the air filter presses on the cam, so that the air filter presses on the cam can be turned off.

[0014] In a further specific embodiment of the present invention, a tube body tightening groove communicating with the clamping claw tightening groove is provided in the middle of the height direction of the insert clamping claw tube and at a position corresponding to the clamping claw tightening groove, and an insert clamping claw tube seat is formed at the lower end of the insert clamping claw tube; an insert clamping claw tube upward resetting mechanism for automatically returning the insert clamping claw tube to an upward position is provided in the pull-down cylinder column cavity of the pull-down cylinder column and at a position corresponding to the lower side of the insert clamping claw tube seat, and the insert clamping claw tube upward resetting mechanism is connected to the upper end of the lower blowing pipe guide sleeve.

[0015] In another specific embodiment of the present invention, the upward reset mechanism of the insert clamping claw tube includes a spring support disk, a group of spring columns and a group of springs. The spring support disk is arranged in the downward pulling cylinder column cavity at a position corresponding to the bottom of the insert clamping claw tube seat, and a group of spring columns are spaced apart in the circumferential direction of the lower blowing pipe guide sleeve, and the upper end faces of the group of spring columns are in contact with the lower surface of the spring support disk, while the lower ends of the group of spring columns are screwed and connected to the upper surface of the lower blowing pipe guide sleeve. The number of a group of springs is equal to the number of a group of spring columns, and they are sleeved on the spring columns. The upper ends of the group of springs are supported on the downward side of the spring support disk, and the lower ends are supported on the upper surface of the lower blowing pipe guide sleeve.

[0016] In yet another specific embodiment of the present invention, an insert supporting step is formed at the upper end of the insert placement bracket and around the circumferential direction of the insert placement bracket.

[0017] The technical effect of the technical solution provided by the utility model is that: during the process of blow-molding a plastic hollow container with an insert at the mouth by the lower blowing method, and before blowing, as long as the online operator places the insert on the insert placement bracket in advance, the lower blowing pipe lifting cylinder operates and the lower blowing pipe lifting cylinder column moves downward together with the lower blowing pipe, forcing a group of insert clamping claws to expand outward and automatically clamp the insert on the insert placement bracket, and the lower blowing pipe enters the blowing state; after the blowing is completed, the lower blowing pipe lifting cylinder operates in the reverse direction to make the lower blowing pipe lifting cylinder column move upward together with the lower blowing pipe, and the upward movement of the trumpet-shaped air outlet head can automatically release the action of the insert clamping claw and make the insert clamping claw return inward, thereby releasing the insert placed on the insert placement bracket. Therefore, the insert can be reliably combined with the mouth of the plastic hollow container during the process of the molten blank being blown by the trumpet-shaped air outlet head of the lower blowing pipe, and the insert can be conveniently removed together with the formed hollow plastic container after the blowing is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the connection between the pull-down cylinder support plate and the pull-down cylinder support plate lifting drive mechanism in the use state;

[0020] Figure 3 for Figure 1 and Figure 2 A longitudinal section view of the insert clamping claw tube shown;

[0021] Figure 4 This is a schematic diagram of an application example of the present utility model. DETAILED DESCRIPTION

[0022] In order to more clearly understand the technical essence and beneficial effects of the present invention, the applicant provides a detailed description in the form of embodiments below. However, the description of the embodiments does not limit the scheme of the present invention. Any equivalent transformation that is merely formal and not substantial based on the concept of the present invention should be regarded as within the scope of the technical solution of the present invention.

[0023] In the following description, all concepts related to directionality or orientation, such as up, down, left, right, front and back, are based on Figure 1 The position state is taken as an example, and therefore it cannot be understood as a special limitation of the technical solution provided by the present utility model.

[0024] In order to interpret the present invention more conveniently and clearly, the applicant Figure 1 and Figure 2 Describe in a combined manner.

[0025] Please see first Figure 2 , shows a rack platform 10, which is suspended above the floor of the use site by supporting legs or similar components (not shown in the figure) in the use state (that is, it corresponds to the above the floor in the suspended state) and has a rack platform cavity 101 in the middle of the rack platform 10; shows a left support plate lifting adjustment mechanism 1, a right support plate lifting adjustment mechanism 2 and a support plate 20, the left support plate lifting adjustment mechanism 1 and the right support plate lifting adjustment mechanism 2 are respectively rotatably arranged at the left and right ends of the aforementioned rack platform 10 in a longitudinal state, and the left and right support plate lifting adjustment mechanisms 1 and 2 are transmission-connected to each other and rotate synchronously. The support plate 20 is raised and lowered, wherein the upper end of the support plate left lifting adjustment mechanism 1 is connected to the left end of the support plate 20, and the upper end of the support plate right lifting adjustment mechanism 2 is connected to the right end of the support plate 20. The support plate 20 is located above the frame platform 10, and a support plate down-blowing mechanism clearance hole 201 is provided in the middle of the support plate 20 and at a position corresponding to the frame platform cavity 101, and an action cylinder column lifting guide plate 202 is fixed on the upward side of the support plate 20, and a guide plate down-blowing mechanism clearance hole 2021 is provided in the middle of the action cylinder column lifting guide plate 202 and at a position corresponding to the support plate down-blowing mechanism clearance hole 201.

[0026] See also Figure 1 And combined Figure 2, shows a pull-down cylinder support plate 30 and a pull-down cylinder 4, a pull-down cylinder column clearance hole 301 is opened in the middle of the pull-down cylinder support plate 30, the pull-down cylinder 4 is fixed to the upward side of the pull-down cylinder support plate 30, and a pull-down cylinder column cavity 411 is formed in the center of the pull-down cylinder column 41 of the pull-down cylinder 4, which passes through from the upper end to the lower end. The lower end of the pull-down cylinder column 41 extends to the lower part of the cylinder body of the pull-down cylinder 4 at a position corresponding to the aforementioned pull-down cylinder column clearance hole 301 and then extends downward to the bottom of the aforementioned pull-down cylinder support plate 30, and a blowing pipe guide sleeve 4111 is fixed to the lower end of the pull-down cylinder column cavity 411, and the upper end of the pull-down cylinder column 41 faces The cam 41 is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, each of which is provided with a plurality of cams, The claw tube yielding hole 51 extends downward into the aforementioned pull-down cylinder column cavity 411 and slides up and down with the cavity wall of the pull-down cylinder column cavity 411; a lower blowing pipe lifting cylinder 7 and a lower blowing pipe 8 are shown, the blowing pipe lifting cylinder 7 is fixed to the lower end of the aforementioned pull-down cylinder column 41 in a longitudinal cantilever state, and the lower end of the lower blowing pipe 8 extends into the aforementioned lower blowing pipe guide sleeve 4111, that is, extends into the lower blowing pipe guide sleeve cavity 41111 of the lower blowing pipe guide sleeve 4111, and is connected to the upper end of the lower blowing pipe lifting cylinder column 71 of the aforementioned lower blowing pipe lifting cylinder 7, and the upper end of the lower blowing pipe 8 is formed with a trumpet-shaped air outlet head 81, the outer wall of the trumpet-shaped air outlet head 81 is formed as an air outlet head inclined surface 811, An insert clamping claw inclined surface 612 is formed on one side of the aforementioned set of insert clamping claws 61 corresponding to the air outlet head inclined surface 811. The aforementioned air outlet head inclined surface 811 cooperates with or releases the cooperation with the aforementioned insert clamping claw inclined surface 612 of the set of insert clamping claws 61. When the aforementioned lower air blowing pipe 8 moves downward under the action of the aforementioned lower air blowing pipe lifting cylinder 7, the air outlet head inclined surface 811 of the aforementioned bell-shaped air outlet head 81 cooperates with the insert clamping claw inclined surface 612 of the aforementioned set of insert clamping claws 61. The air blowing head inclined surface 811 presses the insert clamping claw inclined surface 612 outward and causes the set of insert clamping claws 61 to open (stretch or expand) outward, thereby clamping the insert 50 placed on the insert placement bracket 5 and shown in the figure.When the lower air pipe 8 is displaced upward by the lower air pipe lifting cylinder 7 to the point where the bell-shaped air outlet head 81 protrudes beyond the upwardly facing surface of the set of insert clamping claws 61, the inclined surface 811 of the bell-shaped air outlet head 81 disengages from the inclined surface 612 of the set of insert clamping claws 61, causing the set of insert clamping claws 61 to return inward (i.e., "retract" or "contract"), releasing the clamping of the insert 50.

[0027] Depend on Figure 2 As shown, Figure 2 The figure shows a pull-down cylinder support plate lifting drive mechanism 3. The pull-down cylinder support plate 30 is positioned above the cylinder column lifting guide plate 202, and the pull-down cylinder column clearance hole 301 corresponds to the guide plate blowing mechanism clearance hole 2021. The pull-down cylinder support plate lifting drive mechanism 3 is fixed to the cylinder column lifting guide plate 202 in a longitudinal cantilevered state at a position corresponding to the frame platform cavity 101 and the support plate blowing mechanism clearance hole 201, and slidably extends above the cylinder column lifting guide plate 202 to connect with the pull-down cylinder support plate 30. In other words, when in use, the pull-down cylinder support plate 30 is connected to the pull-down cylinder support plate lifting drive mechanism 3.

[0028] Depend on Figure 2 As shown, a down-blowing air pipe guide sleeve support seat 419a is formed at the bottom of the aforementioned down-blowing action cylinder column 41, extending inward in the direction of the down-blowing action cylinder column cavity 411. The bottom of the aforementioned down-blowing air pipe guide sleeve 4111 is preferably fixed to the down-blowing air pipe guide sleeve support seat 419a by welding or a similar manner.

[0029] Please continue to see Figure 2, a left screw sleeve hole 102 is opened at the left end of the aforementioned frame platform 10 and at a position corresponding to the aforementioned support plate left lifting adjustment mechanism 1, and a right screw sleeve hole 103 is opened at the right end of the frame platform 10 and at a position corresponding to the aforementioned support plate right lifting adjustment mechanism 2; the aforementioned support plate left lifting adjustment mechanism 1 includes a left screw sleeve 11, a left screw 12, a left screw sprocket 13 and a left screw bearing seat 14, the left screw sleeve 11 is fixed to the left end of the aforementioned frame platform 10 by a left screw sleeve fixing screw 111 at a position corresponding to the aforementioned left screw sleeve hole 102, and a left screw thread 121 is formed on the middle part and the wall of the lower end of the left screw 12, and the left screw thread 121 is connected to the left screw sleeve cavity formed in the left screw sleeve 11. The left screw sleeve cavity wall thread 112 cooperates (threaded cooperation), the upper end of the left screw 12 constitutes a threadless rod structure and is rotatably arranged on the aforementioned left screw bearing seat 14 through the left screw bearing 122, and the left screw bearing seat 14 is fixedly connected to the left end of the aforementioned support plate 20 through the left screw bearing seat fixing screw 141, and the left screw sprocket 13 is fixed to the upper end of the left screw 12 at a position corresponding to the left screw bearing seat 14 and the left screw sleeve 11, wherein a left screw cap 123 is provided at the upper end of the left screw 12 and at a position above the left screw bearing seat 14, and the left screw cap 123 corresponds to the left cap clearance hole 203 opened at the left end of the support plate 20, and is engaged with the lower end of the left screw 12. A left screw rod rising limit position limiting plate 124 is fixed to the right part by the left screw 1241 of the limiting plate; the aforementioned support plate right lifting adjustment mechanism 2 includes a right screw sleeve 21, a right screw rod 22, a right screw sprocket 23 and a right screw bearing seat 24. The right screw sleeve 21 is fixed to the right end of the aforementioned frame platform 10 by a right screw sleeve fixing screw 211 at a position corresponding to the aforementioned right screw sleeve hole 103. A right screw thread 221 is formed on the middle part and the wall of the lower end of the right screw rod 22. The right screw thread 221 cooperates with the right screw sleeve cavity wall thread 212 of the right screw sleeve cavity formed in the right screw sleeve 21. The upper end of the right screw rod 22 constitutes a threadless light rod structure and is rotatably set on the aforementioned right screw bearing seat 2 through a right screw bearing 222. 4, the right screw bearing seat 24 is fixedly connected to the right end of the aforementioned support plate 20 by a right screw bearing seat fixing screw 241, and the right screw sprocket 23 is fixed to the upper end of the right screw 22 at a position corresponding to the position between the right screw bearing seat 24 and the right screw sleeve 21, wherein a right screw cap 223 is provided at the upper end of the right screw 22 and above the right screw bearing seat 24, and the right screw cap 223 corresponds to the right cap clearance hole 204 opened at the right end of the support plate 20, and a right screw rising limit position limiting plate 224 is fixed at the lower end of the right screw 22 by a limiting plate right screw 2241; the aforementioned left and right screw sprockets 13, 23 are connected by a synchronous transmission chain 40 driven by a power device.

[0030] If the height of the support plate 20 needs to be adjusted based on process requirements, such as the requirements for blowing different hollow plastic products and the inserts 50 used, the aforementioned power device operates to set the synchronous transmission chain 40 in motion, simultaneously driving the left and right screw sprockets 13 and 23. The left and right screw sprockets 13 and 23 then simultaneously and synchronously drive the left and right screws 12 and 22 to rotate. For example, when the left and right screws 13 and 23 rotate clockwise, the left screw 12 and the right screw 22 rotate upward due to the rotational engagement (thread engagement) between the left screw casing wall thread 112 and the right screw casing wall thread 212, thereby driving the support plate 20 upward. The reverse is also true, which will not be further described. Thus, it can be seen that the left and right support plate lifting and adjusting mechanisms 1 and 2 are used to adjust the height of the support plate 20 and the cylinder column lifting guide plate 202 fixed above the support plate 20.

[0031] See you next time Figure 2 The above-mentioned pull-down cylinder support plate lifting drive mechanism 3 includes a support plate left lifting cylinder 31 and a support plate right lifting cylinder 32. The support plate left lifting cylinder 31 is fixed to the above-mentioned cylinder column lifting guide plate 202 in a longitudinal cantilever state at a position corresponding to the left side of the support plate down-blowing mechanism yielding hole 201. The support plate left lifting cylinder column 311 of the support plate left lifting cylinder 31 extends to the top of the cylinder column lifting guide plate 202 and is connected to the left end of the above-mentioned pull-down cylinder support plate 30. Among them, a support plate left lifting cylinder column up and down sliding guide sleeve 205a is provided on the cylinder column lifting guide plate 202 and at a position corresponding to the support plate left lifting cylinder column 311. The support plate left lifting cylinder column 311 slides with the support plate left lifting cylinder column up and down sliding guide sleeve 205a. The right lifting cylinder 32 is fixed to the aforementioned cylinder column lifting guide plate 202 in a longitudinal cantilever state at a position corresponding to the right side of the yield hole 201 of the aforementioned support plate blowing mechanism. The support plate right lifting cylinder column 321 of the support plate right lifting cylinder 32 extends to the top of the cylinder column lifting guide plate 202 and is connected to the right end of the aforementioned pull-down cylinder support plate 30, wherein a support plate right lifting cylinder column up and down sliding guide sleeve 205b is provided on the aforementioned cylinder column lifting guide plate 202 and at a position corresponding to the support plate right lifting cylinder column 321, and the support plate right lifting cylinder column 321 is slidably matched with the support plate right lifting cylinder column up and down sliding guide sleeve 205b; the aforementioned cylinder column lifting guide plate 202 is fixed to the upward side of the aforementioned support plate 20 by the cylinder column lifting guide plate fixing screw 2022.

[0032] As a preferred solution, a regular hexagonal milling surface 3112 of the left lifting cylinder column of the support plate for operation by hardware tools such as wrenches can be formed at the upper end of the aforementioned left lifting cylinder column 311 of the support plate. Similarly, a regular hexagonal milling surface 3212 of the right lifting cylinder column of the support plate for operation by hardware tools such as wrenches can be formed at the upper end of the aforementioned right lifting cylinder column of the support plate 321.

[0033] Depend on Figure 2 As shown, the aforementioned support plate left lifting cylinder 31 is fixed to the downward side of the aforementioned cylinder column lifting guide plate 202 through the support plate left lifting cylinder seat 312, and the aforementioned support plate right lifting cylinder 32 is fixed to the downward side of the cylinder column lifting guide plate 202 through the support plate right lifting cylinder seat 322; a support plate left lifting cylinder column sealing piston 3111 is provided at the lower end of the aforementioned support plate left lifting cylinder column 311, and the support plate left lifting cylinder column sealing piston 3111 divides the support plate left lifting cylinder chamber 313 of the support plate left lifting cylinder 31 into an upper cylinder chamber located above the support plate left lifting cylinder column sealing piston 3111 and a lower cylinder chamber located below the support plate left lifting cylinder column sealing piston 3111, and the support plate left lifting cylinder upper interface 313 provided on the upper side of the support plate left lifting cylinder 31 14 is communicated with the aforementioned upper cylinder cavity, and the support plate left lifting cylinder lower interface 315 arranged on the lower side of the support plate left lifting cylinder 31 is communicated with the aforementioned lower cylinder cavity; a support plate right lifting cylinder column sealing piston 3211 is provided at the lower end of the aforementioned support plate right lifting cylinder column 321, and the support plate right lifting cylinder cavity 323 of the support plate right lifting cylinder 32 is divided into an upper cavity located above the support plate right lifting cylinder column sealing piston 3211 and a lower cavity located below the support plate right lifting cylinder column sealing piston 3211 by the support plate right lifting cylinder column sealing piston 3211, the support plate right lifting cylinder upper interface 324 arranged on the upper side of the support plate right lifting cylinder 32 is communicated with the aforementioned upper cavity, and the support plate right lifting cylinder lower interface 325 arranged on the lower side of the support plate right lifting cylinder 32 is communicated with the aforementioned lower cavity.

[0034] The aforementioned support plate left lifting cylinder 31 and support plate right lifting cylinder 32 are oil cylinders, and the aforementioned support plate left lifting cylinder upper and lower interfaces 314, 315 and support plate right lifting cylinder upper and lower interfaces 324, 325 are oil inlet and outlet interfaces respectively.

[0035] Since the working principles of the left and right lifting cylinders 31 and 32 of the aforementioned support plate are the same and the movements are also synchronized with each other, the applicant only selects one of them, that is, only selects the working process of the left lifting cylinder 31 of the support plate for detailed description as follows.

[0036] Oil ("hydraulic oil" or "pressure oil") flows into the upper port 314 of the support plate left lift cylinder. The oil enters the upper cylinder chamber, forcing the sealing piston 3111 of the support plate left lift cylinder column and the support plate left lift cylinder column 311 downward, driving (pulling) the aforementioned pull-down cylinder support plate 30 downward, and the pull-down cylinder 4, which is provided with the pull-down cylinder support plate 30 as a support, also moves downward accordingly. Conversely, oil ("hydraulic oil" or "pressure oil") flows into the lower port 315 of the support plate left lift cylinder. The oil enters the lower cylinder chamber, forcing the sealing piston 3111 of the support plate left lift cylinder column and the support plate left lift cylinder column 311 upward, driving (pushing) the aforementioned pull-down cylinder support plate 30 upward, and the pull-down cylinder 4, which is provided with the pull-down cylinder support plate 30 as a support, also moves upward accordingly.

[0037] See you next time Figure 1 And combined Figure 2 A cooling medium inlet hole 412 and a cooling medium outlet hole 413 are provided on the pull-down cylinder column 41 of the pull-down cylinder 4 and along the height direction of the pull-down cylinder column 41. The cooling medium referred to herein is preferably water, but cooling oil or the like can also be used. The cooling medium inlet hole 412 and the cooling medium outlet hole 413 are spaced 180 degrees apart from each other in the circumferential direction of the pull-down cylinder column 41 and communicate with the cooling medium circulation concave channel 414 provided on the top of the pull-down cylinder column 41. At the bottom of the pull-down cylinder column 41 and corresponding to the cooling medium inlet hole 41 2 is equipped with a cooling medium introduction pipe 415, and a cooling medium introduction pipe fitting 4151 is provided at the end of the cooling medium introduction pipe 415 away from the cooling medium introduction hole 412. A cooling medium outlet pipe 416 is equipped at the bottom of the pull-down cylinder column 41 and at a position corresponding to the cooling medium outlet hole 413, and a cooling medium outlet pipe fitting 4161 is provided at the end of the cooling medium outlet pipe 416 away from the cooling medium outlet hole 413; a sealing fit is formed between the middle part of the aforementioned insert placement bracket 5 and the upper end face of the aforementioned pull-down cylinder column 41.

[0038] When in use, the cooling medium inlet pipe fitting 4151 is connected to the cooling medium delivery pipe, while the cooling medium outlet pipe fitting 4161 is connected to the cooling medium return pipe. The cooling medium flows sequentially through the cooling medium delivery pipe, cooling medium inlet pipe fitting 4151, cooling medium inlet pipe 415, cooling medium inlet hole 412, cooling medium circulation channel 414 (also called "cooling medium circulation cavity"), cooling medium outlet hole 413, cooling medium outlet pipe 416, cooling medium outlet pipe fitting 4161, and the cooling medium return pipe, thereby forming a circulating reflux cooling system. According to professional common sense, the purpose of cooling is to improve the efficiency of blow molding, that is, to increase the speed at which the molten billet is transformed into a container. The component that primarily benefits from cooling is the insert mounting bracket 5.

[0039] On the cavity wall of the pull-down cylinder column cavity 411 of the aforementioned pull-down cylinder column 41 and at the upper end of the cavity wall, a bracket fixed connector compensation cavity 4112 is expanded, and on the cavity wall of the bracket fixed connector compensation cavity 4112 and around the circumferential direction of the bracket fixed connector compensation cavity 4112, a compensation cavity wall thread 41121 is formed, and the lower end of the aforementioned insert placement bracket 5 is formed with a bracket fixed connector 52, and on the outer wall of the bracket fixed connector 52 is formed a bracket fixed connector external thread 521, and the bracket fixed connector external thread 521 is connected to the aforementioned compensation cavity cavity. The wall thread 41121 is threadedly fixed; a sealing ring groove is provided on the upper end face of the aforementioned pull-down cylinder column 41 and at the inner and outer sides of the aforementioned cooling medium circulation concave channel 414, and a pull-down cylinder upper end face sealing ring 417 is embedded in the sealing ring groove. The bottom surface of the middle part of the aforementioned insert placement bracket 5 forms a seal with the pull-down cylinder upper end face sealing ring 417. The aforementioned pull-down cylinder 4 is fixed to the upper side of the aforementioned pull-down cylinder support plate 30 by screws, and the aforementioned pull-down cylinder column 41 is sealed by the pull-down cylinder column sealing piston 4 18 is in sealing engagement with the wall of the pull-down cylinder cavity 42 of the pull-down cylinder 4, and the pull-down cylinder cavity 42 is divided into an upper cylinder cavity located above the pull-down cylinder cavity sealing piston 418 and a lower cylinder cavity located below the pull-down cylinder cavity sealing piston 418 by the pull-down cylinder column sealing piston 418; a left inlet and outlet through-hole 43 and a right inlet and outlet through-hole 44 are provided on the pull-down cylinder body of the pull-down cylinder 4, the left inlet and outlet through-hole 43 being in communication with the lower cylinder cavity, and the right inlet and outlet through-hole 44 being in communication with the upper cylinder cavity, 4 and is equipped with a left in-and-out through-hole connecting pipe 431 communicating with the left in-and-out through-hole 43 at a position corresponding to the left in-and-out through-hole 43, and a left in-and-out through-hole connecting pipe nozzle 4311 is provided at one end of the left in-and-out through-hole connecting pipe 431 away from the left in-and-out through-hole 43, that is, the lower end thereof. A right in-and-out through-hole connecting pipe 441 communicating with the right in-and-out through-hole 44 is equipped with a right in-and-out through-hole connecting pipe 441 at the bottom of the pull-down cylinder 4 and is equipped with a right in-and-out through-hole connecting pipe 441 communicating with the right in-and-out through-hole 44, and a right in-and-out through-hole connecting pipe nozzle 4411 is provided at one end of the right in-and-out through-hole connecting pipe 441 away from the right in-and-out through-hole 44.

[0040] In this embodiment, the aforementioned pull-down cylinder 4 is an oil cylinder, the aforementioned left and right inlet and outlet holes 43 and 44 are oil holes, the aforementioned left and right inlet and outlet hole connecting pipes 431 and 441 are oil pipes respectively; the aforementioned upper and lower cylinder chambers are the upper and lower oil chambers of the oil cylinder respectively.

[0041] When in use, the aforementioned left inlet and outlet through-hole connecting pipe nozzle 4311 is connected to the left inlet and outlet oil pipe, and the aforementioned right inlet and outlet through-hole connecting pipe nozzle 4411 is connected to the right inlet and outlet oil pipe. When the right inlet and outlet oil pipe sequentially passes the right inlet and outlet through-hole connecting pipe nozzle 4411, the right inlet and outlet through-hole connecting pipe 441 and the right inlet and outlet through-hole 44 into the aforementioned upper cylinder chamber, the aforementioned pull-down cylinder column 41 descends; conversely, when the left inlet and outlet oil pipe sequentially passes the left inlet and outlet through-hole connecting pipe nozzle 4311, the left inlet and outlet through-hole connecting pipe 431 and the left inlet and outlet through-hole 43 into the aforementioned lower cylinder chamber, the oil returns to the upper cylinder chamber and the pull-down cylinder column 41 ascends.

[0042] See you next time Figure 1 and Figure 2 The upper end of the lower air pipe lifting cylinder column 71 of the aforementioned lower air pipe lifting cylinder 7 extends upward outside the cylinder body and forms a lower air pipe connecting sleeve 711, and the lower air pipe connecting sleeve 711 is inserted into the aforementioned lower air pipe guide sleeve 4111, that is, inserted into the lower air pipe guide sleeve cavity 41111 of the lower air pipe guide sleeve 4111, and the lower end of the aforementioned lower air pipe 8 is inserted into the lower air pipe connecting sleeve 711 and is threadedly connected with the lower air pipe connecting sleeve 711, and a cylinder column vent hole 712 is opened in the central position of the lower air pipe lifting cylinder column 71 and along the height direction of the lower air pipe lifting cylinder column 71, and the cylinder column vent hole 712 is communicated with the lower air pipe airway 82 opened in the central position of the lower air pipe 8 and running through the height direction of the lower air pipe 8, and the lower air pipe lifting cylinder The middle part of the column 71 is located in the lower air pipe lifting cylinder cavity of the lower air pipe lifting cylinder 7 and is provided with a lower air pipe lifting cylinder column sealing piston 713. The lower air pipe lifting cylinder column sealing piston 713 divides the lower air pipe lifting cylinder cavity of the lower air pipe lifting cylinder 7 into an upper cylinder cavity of the lower air pipe lifting cylinder located above the lower air pipe lifting cylinder column sealing piston 713 and a lower cylinder cavity of the lower air pipe lifting cylinder located below the lower air pipe lifting cylinder column sealing piston 713. An upper inlet and outlet interface 72 communicating with the aforementioned upper cylinder cavity of the lower air pipe lifting cylinder is provided on the upper side of the lower air pipe lifting cylinder 7, and a lower inlet and outlet interface 73 communicating with the aforementioned lower cylinder cavity of the lower air pipe lifting cylinder is provided on the lower side of the lower air pipe lifting cylinder 7.

[0043] In this embodiment, since the aforementioned lower blowing pipe lifting cylinder 7 is an oil cylinder, the aforementioned upper inlet and outlet interface 72 is the upper inlet and outlet oil pipe interface of the pressure oil, and the aforementioned lower inlet and outlet interface 73 is the lower inlet and outlet oil pipe interface of the pressure oil; the lower end port of the aforementioned cylinder column vent 712 is configured as a blowing air inlet 7121 for introducing blowing air (i.e., blowing air) into the lower blowing pipe air duct 82, and the upper end of the lower blowing pipe air duct 82 extends to the aforementioned trumpet-shaped air outlet head 81 and is configured as a blowing air outlet 822.

[0044] See you next time Figure 1 and Figure 2 And combined Figure 4 When oil is introduced into the upper inlet and outlet interface 72 of the pipeline, the oil enters the upper cylinder chamber of the aforementioned lower air blowing pipe lifting cylinder, so that the oil pressure will force the sealing piston 713 of the lower air blowing pipe lifting cylinder column together with the lower air blowing pipe lifting cylinder column 71 to move downward, and the lower air blowing pipe lifting cylinder column 71 drives the lower air blowing pipe 8 to move downward accordingly. The aforementioned trumpet-shaped air outlet head 81 moves downward and cooperates with the insert clamping claw 61 of the insert clamping claw tube 6, so that the insert clamping claw 61 is stretched outward (opened) and the bottom surface of the insert clamping claw 61 presses the upper surface of the insert 50 placed on the insert supporting step 53 mentioned below, that is, the edge (upper edge) of the insert 50 is clamped between the insert clamping claw 61 and the insert supporting step 53. In this state, the blowing air introduced from the blowing air inlet 7121 (by a pump or similar device to generate pressure) is blown (usually conventional air or nitrogen) through the cylinder vent 712 and the lower blowing pipe channel 82 and is led out from the blowing air outlet 822, Figure 3 The molten preform in the mold 60 (the two opposing mold halves) is blown into a hollow bottle or can container with an insert 50 embedded in the mouth, the same shape as the mold cavity 601 of the mold 60. After blow molding, the mold 60 is opened while the blowing is temporarily stopped. At this point, oil enters the lower inlet and outlet port 73 and the lower cylinder chamber of the lower blow pipe lifting cylinder. This reverses the process described above, causing the lower blow pipe lifting cylinder column 71 to move upward, driving the lower blow pipe 8 upward as well. The inflation air outlet 822 moves upward, releasing the insert clamping claws 61. The insert clamping claws 61 contract, or collapse, releasing the insert 50. The inflated bottle or can container with the insert 50 can then be removed. The next step repeats.

[0045] See Figure 3 And combined Figure 1 and Figure 2 A tube body tightening groove 62 communicating with the clamping claw tightening groove 611 is provided in the middle of the height direction of the aforementioned insert clamping claw tube 6 and at a position corresponding to the aforementioned clamping claw tightening groove 611. An insert clamping claw tube seat 63 is formed at the lower end of the insert clamping claw tube 6. Figure 1 and Figure 2 As shown, an insert clamping claw tube upward reset mechanism 9 is provided in the pull-down cylinder column cavity 411 of the aforementioned pull-down cylinder column 41 and at a position corresponding to the lower side of the aforementioned insert clamping claw tube seat 63, for automatically returning the insert clamping claw tube 6 to an upward direction. The insert clamping claw tube upward reset mechanism 9 is connected to the upper end of the aforementioned lower blowing pipe guide sleeve 4111.

[0046] The aforementioned insert clamping claw tube upward reset mechanism 9 includes a spring support plate 91, a group of spring columns 92 and a group of springs 93. The spring support plate 91 is arranged in the aforementioned pull-down cylinder column cavity 411 at a position corresponding to the bottom of the aforementioned insert clamping claw tube seat 63, and a group of spring columns 92 are spaced apart in the circumferential direction of the aforementioned lower blowing pipe guide sleeve 4111, and the upper end face of the group of spring columns 92 is in contact with the lower surface of the spring support plate 91, while the lower end of the group of spring columns 92 is screwed (threaded and fixed) to the upper surface of the lower blowing pipe guide sleeve 4111. The number of a group of springs 93 is equal to the number of a group of spring columns 92, and they are sleeved on the spring columns 92. The upper end of the group of springs 93 is supported on the downward side of the spring support plate 91, and the lower end is supported on the upper surface of the lower blowing pipe guide sleeve 4111.

[0047] Depend on Figure 1 and Figure 2 As shown, an insert supporting step 53 is formed at the upper end of the insert placement bracket 5 and around the circumferential direction of the insert placement bracket 5.

[0048] As previously mentioned, the blowing is carried out under the action of the lower blowing pipe lifting cylinder 7, which causes the lower blowing pipe 8 to descend and act on the insert clamping claw 61, so that the insert clamping claw 61 cooperates with the insert support step 53 of the insert placement bracket 5 to clamp the insert 50. During this process, due to the downward movement of the lower blowing pipe 8, the insert clamping claw tube seat 63 acts on the spring support plate 91, and the spring support plate 91 descends, causing the group of springs 93 to compress and store energy. However, after the blowing is completed, when the lower blowing pipe 8 ascends and releases its action on the insert clamping claw tube 6, the spring support plate 91 is pushed upward by the restoring force of the group of springs 93, thereby pushing the insert clamping claw tube seat 63 of the insert clamping claw tube 6 upward, and finally causing the insert clamping claw tube 6 to move upward and automatically release the clamping claw 61 of the insert clamping claw tube 6 from the insert 50. Each time a container with an insert 50 at the mouth is blown, the aforementioned group of springs 93 undergoes a compression and extension process.

[0049] See Figure 4 And combined Figure 1 and Figure 2 ,exist Figure 4The figure shows the mold 60 mentioned above. This mold 60 comprises a mold blow head clearance cavity 602, which allows the bell-shaped outlet head 81 of the lower blow pipe 8 to enter the mold cavity 601 (i.e., the mold cavity). The molten plastic preform, or melt, is introduced into the mold cavity 601 of the mold 60 by a melt extrusion feeding device, or discharge device, before the molds are closed. With the mold halves in the closed state, the blowing process begins as described above. The specific process is briefly described as follows: First, the pull-down cylinder support plate lifting drive mechanism 3 raises the pull-down cylinder support plate 30, the pull-down cylinder column 41 of the pull-down cylinder 4, and the blow-down pipe lifting cylinder column 71 of the blow-down pipe lifting cylinder 7, along with the blow-down pipe 8, into position. Then, an online operator or a separately equipped robot places the insert 50 on the insert support step 53 of the insert placement bracket 5. The blow-down pipe lifting cylinder 7 then reverses, as described above, until the insert clamping claw 60 clamps the insert 50. At this point, the die head discharges the material (i.e., the die head outputs the molten material). Once the material is in place, the mold 60 is closed, and air introduced through the blow-down pipe airway 82 and discharged through the inflation air outlet 822 is blown. During the blowing process, the pull-down cylinder 4 reverses, fully lowering the pull-down cylinder column 41 to securely connect the insert 50 to the container's mouth. During the blow molding process, the cooling medium circulation concave channel 414 circulates the cooling medium, such as water. After the inflation molding process is completed, the mold is opened, and the lower blow pipe lifting cylinder column 71 drives the lower blow pipe 8 upward. The lower pull cylinder support plate lifting drive mechanism 3 operates in reverse, causing the lower pull cylinder support plate 30 to descend, removing the formed hollow plastic container, such as a bottle, can, or barrel, with the insert 50 at the mouth.

[0050] In summary, the technical solution provided by the present utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A down-blowing device with the function of automatically clamping and releasing the insert, characterized in that: The invention comprises a pull-down cylinder support plate (30) and a pull-down cylinder (4), wherein a pull-down cylinder column clearance hole (301) is provided in the middle of the pull-down cylinder support plate (30), the pull-down cylinder (4) is fixed on the upward side of the pull-down cylinder support plate (30), and a pull-down cylinder column cavity (411) is formed in the center of the pull-down cylinder column (41) of the pull-down cylinder (4) and passes through from the upper end to the lower end, the lower end of the pull-down cylinder column (41) extends to the lower part of the cylinder body of the pull-down cylinder (4) at a position corresponding to the pull-down cylinder column clearance hole (301) and then extends downward to the bottom of the pull-down cylinder support plate (30), and a blow hole (411) is fixed at the lower end of the pull-down cylinder column cavity (411) The invention relates to an air pipe guide sleeve (4111), wherein the upper end of the pull-down cylinder column (41) extends upward toward the upper part of the cylinder body away from the pull-down cylinder (4); an insert placement bracket (5), wherein the insert placement bracket (5) is fixed to the upper end of the pull-down cylinder column (41), and a insert clamping claw tube clearance hole (51) is formed at the central position of the insert placement bracket (5) and passes through from the upper end of the insert placement bracket (5) to the lower end; an insert clamping claw tube (6), wherein a group of insert clamping claws (61) are formed in an interval state at the upper end of the insert clamping claw tube (6) and around the insert clamping claw tube (6), wherein the group of insert clamping claws (61) corresponds to the upper part of the insert placement bracket (5), and between each two adjacent insert clamping claws (61) 1), a clamping claw tensioning groove (611) is formed between the insert clamping claw tube (6), the lower end of the insert clamping claw tube (6) extends downward through the insert clamping claw tube clearance hole (51) into the pull-down cylinder column cavity (411) and slides up and down with the cavity wall of the pull-down cylinder column cavity (411); a lower blowing pipe lifting cylinder (7) and a lower blowing pipe (8), the lower blowing pipe lifting cylinder (7) is fixed to the lower end of the pull-down cylinder column (41) in a longitudinal cantilever state, the lower end of the lower blowing pipe (8) extends into the lower blowing pipe guide sleeve (4111) and is connected to the upper end of the lower blowing pipe lifting cylinder column (71) of the lower blowing pipe lifting cylinder (7), and the upper end of the lower blowing pipe (8) is formed with a trumpet-shaped air outlet head (8 1), the outer wall of the bell-shaped air outlet head (81) cooperates with or releases the group of insert clamping claws (61), and when the lower air pipe (8) moves downward under the action of the lower air pipe lifting cylinder (7), the outer wall of the bell-shaped air outlet head (81) cooperates with the group of insert clamping claws (61) and causes the group of insert clamping claws (61) to open outward to automatically clamp the insert placed on the insert placement bracket (5), and when the lower air pipe (8) moves upward under the action of the lower air pipe lifting cylinder (7), the outer wall of the bell-shaped air outlet head (81) automatically releases the cooperation with the group of insert clamping claws (61), and the group of insert clamping claws (61) retract inward to release the clamping of the insert.

2. The down-blowing device with the function of automatically clamping and releasing the insert according to claim 1 is characterized in that: The outer wall of the trumpet-shaped air outlet head (81) formed at the upper end of the lower air blowing pipe (8) is formed as an air outlet head inclined surface (811), and an insert clamping claw inclined surface (612) is formed on one side of the set of insert clamping claws (61) corresponding to the air outlet head inclined surface (811). The air outlet head inclined surface (811) and the insert clamping claw inclined surface (612) are matched or released from the match, and when the lower air blowing pipe (8) is displaced downward under the action of the lower air blowing pipe lifting cylinder (7), the air outlet head inclined surface (811) and the insert clamping claw inclined surface (612) are matched to be moved by the air outlet head inclined surface (811). 811) presses the inclined surface (612) of the insert clamping claw outward and causes a group of insert clamping claws (61) to open outward, thereby automatically clamping the insert placed on the insert placement bracket (5); and when the lower air blowing pipe (8) is displaced upward under the action of the lower air blowing pipe lifting cylinder (7) and moves upward to the extent that the bell-shaped air outlet head (81) protrudes out of the surface of the side of the group of insert clamping claws (61) facing upward, the inclined surface (811) of the air outlet head releases the cooperation with the inclined surface (612) of the insert clamping claw and causes the group of insert clamping claws (61) to return inward.

3. The down-blowing device with the function of automatically clamping and releasing the insert according to claim 1 is characterized in that: A cooling medium inlet hole (412) and a cooling medium outlet hole (413) are provided on the pull-down cylinder column (41) of the pull-down cylinder (4) and along the height direction of the pull-down cylinder column (41). The cooling medium inlet hole (412) and the cooling medium outlet hole (413) are spaced 180 degrees apart from each other in the circumferential direction of the pull-down cylinder column (41) and communicate with a cooling medium circulation concave channel (414) provided at the top of the pull-down cylinder column (41). A cooling medium inlet hole (412) and a cooling medium outlet hole (413) are provided at the bottom of the pull-down cylinder column (41) and at a position corresponding to the cooling medium inlet hole (412). A pipe (415) is provided with a cooling medium inlet pipe fitting (4151) at one end of the cooling medium inlet pipe (415) away from the cooling medium inlet hole (412); a cooling medium outlet pipe (416) is provided at the bottom of the pull-down cylinder column (41) and at a position corresponding to the cooling medium outlet hole (413); a cooling medium outlet pipe fitting (4161) is provided at one end of the cooling medium outlet pipe (416) away from the cooling medium outlet hole (413); a sealing fit is formed between the middle portion of the insert mounting bracket (5) and the upper end face of the pull-down cylinder column (41).

4. The down-blowing device with the function of automatically clamping and releasing the insert according to claim 3 is characterized in that: A bracket fixed connector compensation cavity (4112) is extended on the cavity wall of the pull-down cylinder cavity (411) of the pull-down cylinder column (41) and located at the upper end of the cavity wall. A compensation cavity wall thread (41121) is formed on the cavity wall of the bracket fixed connector compensation cavity (4112) and around the circumferential direction of the bracket fixed connector compensation cavity (4112). A bracket fixed connector (52) is formed at the lower end of the insert placement bracket (5). A bracket fixed connector external thread (521) is formed on the outer wall of the bracket fixed connector (52). The bracket fixed connector external thread (521) is threadedly matched and fixed with the compensation cavity wall thread (41121).

5. The down-blowing device with the function of automatically clamping and releasing the insert according to claim 3 is characterized in that: A sealing ring groove is provided on the upper end face of the pull-down cylinder column (41) and at the inner and outer sides of the cooling medium circulation concave channel (414). A seal ring (417) is embedded in each of the sealing ring grooves. The bottom surface of the middle part of the insert placement bracket (5) forms a seal with the seal ring (417) on the upper end face of the pull-down cylinder. The pull-down cylinder (4) is fixed to the upper side of the pull-down cylinder support plate (30) by screws. The pull-down cylinder column (41) is sealedly slidably matched with the pull-down cylinder cavity wall of the pull-down cylinder cavity (42) of the pull-down cylinder (4) by the pull-down cylinder column sealing piston (418). The pull-down cylinder cavity (42) is divided into an upper cylinder cavity located above the pull-down cylinder column sealing piston (418) and an upper cylinder cavity located above the pull-down cylinder column sealing piston (418). A left inlet and outlet through hole (43) and a right inlet and outlet through hole (44) are provided on the cylinder body of the pull-down cylinder (4), the left inlet and outlet through hole (43) being in communication with the lower cylinder chamber, and the right inlet and outlet through hole (44) being in communication with the upper cylinder chamber, a left inlet and outlet through hole connecting pipe (431) in communication with the left inlet and outlet through hole (43) being provided at the bottom of the pull-down cylinder (4) and at a position corresponding to the left inlet and outlet through hole (43), A left inlet and outlet through-hole connecting pipe nozzle (4311) is provided at one end of the outlet through-hole connecting pipe (431) away from the left inlet and outlet through-hole (43), and a right inlet and outlet through-hole connecting pipe (441) communicating with the right inlet and outlet through-hole (44) is provided at the bottom of the pull-down cylinder (4) and at a position corresponding to the right inlet and outlet through-hole (44), and a right inlet and outlet through-hole connecting pipe nozzle (4411) is provided at one end of the right inlet and outlet through-hole connecting pipe (441) away from the right inlet and outlet through-hole (44).

6. The down-blowing device with the function of automatically clamping and releasing the insert according to claim 5, characterized in that: The pull-down cylinder (4) is an oil cylinder, the left and right inlet and outlet through holes (43, 44) are oil holes, the left and right inlet and outlet through hole connecting pipes (431, 441) are oil pipes; and the upper and lower cylinder chambers are the upper and lower oil chambers of the oil cylinder, respectively.

7. The down-blowing device with the function of automatically clamping and releasing the insert according to claim 1 is characterized in that: The upper end of the lower air blowing pipe lifting cylinder column (71) of the lower air blowing pipe lifting cylinder (7) extends upwardly outside the cylinder body and is formed with a lower air blowing pipe adapter sleeve (711), the lower air blowing pipe adapter sleeve (711) is inserted into the lower air blowing pipe guide sleeve (4111), the lower end of the lower air blowing pipe (8) is inserted into the lower air blowing pipe adapter sleeve (711) and is threadedly connected to the lower air blowing pipe adapter sleeve (711), at the central position of the lower air blowing pipe lifting cylinder column (71) and along the height of the lower air blowing pipe lifting cylinder column (71). A cylinder column vent hole (712) is provided in the vertical direction, and the cylinder column vent hole (712) is communicated with a lower air pipe airway (82) which is provided at the central position of the lower air pipe (8) and passes through the lower air pipe (8) in the height direction. The middle part of the lower air pipe lifting cylinder column (71) is located in the lower air pipe lifting cylinder cavity of the lower air pipe lifting cylinder (7) and is provided with a lower air pipe lifting cylinder column sealing piston (713). The lower air pipe lifting cylinder column sealing piston (713) is used to seal the lower air pipe lifting cylinder (7). ) is divided into an upper cylinder chamber of the lower air pipe lifting action cylinder located above the sealing piston (713) of the lower air pipe lifting action cylinder column and a lower cylinder chamber of the lower air pipe lifting action cylinder located below the sealing piston (713) of the lower air pipe lifting action cylinder column, an upper inlet and outlet interface (72) communicating with the upper cylinder chamber of the lower air pipe lifting action cylinder is provided on the upper side of the lower air pipe lifting action cylinder (7), and an upper inlet and outlet interface (72) communicating with the lower cylinder chamber of the lower air pipe lifting action cylinder is provided on the lower side of the lower air pipe lifting action cylinder (7). The lower inlet and outlet interfaces (73) are interconnected; the lower blowing pipe lifting cylinder (7) is an oil cylinder, the upper inlet and outlet interfaces (72) are pressure oil upper inlet and outlet oil pipe interfaces, and the lower inlet and outlet interfaces (73) are pressure oil lower inlet and outlet oil pipe interfaces; the lower end port of the cylinder column vent (712) is configured as a blowing air inlet (7121) for introducing blowing air into the lower blowing pipe airway (82), and the upper end of the lower blowing pipe airway (82) extends to the bell-shaped air outlet head (81) and is configured as a blowing air outlet (822).

8. The down-blowing device with the function of automatically clamping and releasing the insert according to claim 1 is characterized in that: A tube body tensioning groove (62) communicating with the clamping claw tensioning groove (611) is provided in the middle of the height direction of the insert clamping claw tube (6) and at a position corresponding to the clamping claw tensioning groove (611); an insert clamping claw tube seat (63) is formed at the lower end of the insert clamping claw tube (6); an insert clamping claw tube upward reset mechanism (9) for automatically returning the insert clamping claw tube (6) upward is provided in the pull-down cylinder column cavity (411) of the pull-down cylinder column (41) and at a position corresponding to the lower side of the insert clamping claw tube seat (63); the insert clamping claw tube upward reset mechanism (9) is connected to the upper end of the lower blowing pipe guide sleeve (4111).

9. The down-blowing device with the function of automatically clamping and releasing the insert according to claim 8, characterized in that: The insert clamping claw tube upward reset mechanism (9) comprises a spring support plate (91), a group of spring columns (92) and a group of springs (93). The spring support plate (91) is arranged in the pull-down cylinder column cavity (411) at a position corresponding to the lower part of the insert clamping claw tube seat (63) so as to move up and down. A group of spring columns (92) are distributed at intervals in the circumferential direction of the lower blowing pipe guide sleeve (4111), and the upper end surface of the group of spring columns (92) contacts the lower surface of the spring support plate (91), while the lower end of the group of spring columns (92) is screwed and connected to the upper surface of the lower blowing pipe guide sleeve (4111). The number of the group of springs (93) is equal to the number of the group of spring columns (92), and they are sleeved on the spring columns (92). The upper end of the group of springs (93) is supported on the downward side of the spring support plate (91), while the lower end is supported on the upper surface of the lower blowing pipe guide sleeve (4111).

10. The down-blowing device with the function of automatically clamping and releasing the insert according to claim 1, characterized in that: An insert supporting step (53) is formed at the upper end of the insert placement bracket (5) and around the circumferential direction of the insert placement bracket (5).

Images