A structure of single injection head with multiple injections for a continuous upper shoemaking machine

Abstract

The present invention discloses a structure of a single injection head with multiple injections of a shoe-making machine with uppers, comprising a mounting bracket hingedly mounted on a frame, a feeding mechanism slidably arranged on the mounting bracket and driven to translate by a driving oil cylinder, an injection nozzle arranged at the discharge port of the feeding mechanism, and a height adjustment mechanism for driving the lever-type mounting bracket to rise and fall arranged on the frame; the injection nozzle has two states, one is adapted to the external injection-type shoe-making with uppers injection molding state, at which time the discharge port of the injection nozzle is arranged horizontally, and the other is adapted to the internal injection-type shoe-making with uppers injection molding state, at which time the discharge port of the injection nozzle is arranged vertically. Thus, it can adapt to different injection molding states, has stronger applicability, reduces the procurement cost of factory equipment, and reduces the factory space occupied in production.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding equipment, and in particular relates to a structure of a single injection molding head with multiple injections for a shoe-making machine with uppers. Background Art

[0002] Existing upper-injection shoes use an injection molding machine to inject molten plastic into a closed shoe mold, bond it to the upper on the shoe last, and cool it to shape it to make a finished shoe. The traditional conventional upper-injection shoe process is to inject material from the side of the shoe mold of the external injection upper-injection mold. There is an injection plastic head on the sole, which affects the appearance of the shoe. In recent years, a new process of injecting material from the inside of the shoe last of the internal injection upper-injection mold has been introduced on the market, making the produced shoes more beautiful. For example, a new lever-type injection machine for last-injected upper shoes disclosed in application number 201910014731.4 sets the injection nozzle to a vertical state, and cooperates with the upward-set last injection hole to achieve injection molding from the inside of the last. The mold structure and appearance of these two injection molding processes are similar, but the difference is that the positions of the feed holes of the two injection molding processes are different. The feed hole of the traditional process is on the side of the shoe mold, and the new injection molding process feeds from the top of the shoe last. The lever-type injection machine for the new type of last-injected upper shoes can only be used for inner-injected upper shoes, and its scope of use is too single. Existing shoe factories need to purchase two types of upper injection molding machines with different structures because they need to make both conventional and new upper injection-molded shoes. This will greatly increase the equipment procurement cost and occupy more factory space. Summary of the invention

[0003] The purpose of the present invention is to provide a single injection head multi-injection structure of a shoe-making machine with uppers for use, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a structure of a single injection head for multiple injections of a shoe-making machine with uppers, comprising a mounting bracket hingedly mounted on a frame, a feeding mechanism slidably mounted on the mounting bracket and driven to translate by a driving cylinder, an injection nozzle being arranged at the discharge port of the feeding mechanism, and a height adjustment mechanism for driving the lever-type mounting bracket to rise and fall being arranged on the frame;

[0005] The injection nozzle has two replaceable forms. One is adapted to the external injection type upper shoe injection molding state, and the discharge port of the injection nozzle is horizontally arranged. The other is adapted to the internal injection type upper shoe injection molding state, and the discharge port of the injection nozzle is vertically arranged.

[0006] Preferably, when the injection molding state of the shoe with upper is adapted, a holding mechanism for driving the injection nozzle downward is arranged above the injection nozzle, at which time the feed port end of the injection nozzle is connected to the discharge port of the feeding mechanism, and a material blocking mechanism is arranged inside the injection nozzle.

[0007] Preferably, the material blocking mechanism comprises a guide support, a second oil cylinder fixedly mounted on the guide support, and a material blocking rod fixedly mounted on the output end of the second oil cylinder, one end of the material blocking rod is inserted into the injection nozzle and has two states with the material outlet of the injection nozzle;

[0008] The first is the closed state of the discharge port where the side wall of the end of the material blocking rod is in contact with the inner wall of the discharge port of the injection nozzle, and the second oil cylinder is extended; the second is the open state of the discharge port where the side wall of the end of the material blocking rod is separated from the inner wall of the discharge port of the injection nozzle, and the second oil cylinder is retracted.

[0009] Preferably, the holding mechanism comprises a first oil cylinder which is inverted and fixedly mounted on the upper end of the guide block via a bracket, and a pressing block which is connected to the output end of the first oil cylinder via a universal joint.

[0010] Preferably, a material guide block is fixedly installed at the output end of the feeding mechanism by bolts, a material guide channel is provided inside the material guide block and is connected to the outlet end of the feeding mechanism, and the injection nozzle is vertically fixedly installed at the lower end of the material guide block and is connected to the material guide channel.

[0011] Preferably, the height adjustment mechanism includes a gear steering box fixedly mounted on the lower side of the mounting bracket, a hand-cranked turntable fixedly connected to the output shaft of the gear steering box, and a screw lift arranged between the mounting bracket and the frame, the input shaft of the screw lift being fixed to the output shaft of the gear steering box through a universal joint, the screw portion of the screw lift being relatively vertically fixed to the upper end surface of the frame, and the lifting shell of the screw lift being fixedly connected to the mounting bracket.

[0012] Preferably, a group of guide shafts are relatively parallelly arranged on the mounting bracket, and a guide sleeve is fixedly mounted on the lower end of the feeding mechanism, and the guide sleeve is sleeved on the guide shaft.

[0013] The technical effects and advantages of the present invention are as follows: the structure of the co-injection mechanism of the inner and outer injection mold integrates the design of two injection nozzles with different assembly states used in actual factories, ensuring that under different injection molding processing conditions, there is no need to replace the entire machine, and only a simple reassembly of the injection molding mechanism is required. The equipment has better applicability and high work efficiency, which reduces the procurement cost of factory equipment and reduces the factory space occupied during production. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 It is a structural schematic diagram of the material blocking mechanism and the pressing mechanism;

[0016] Figure 3 The figure is a schematic diagram of installing the mounting bracket on the rack;

[0017] Figure 4 It is a practical working schematic diagram of the present invention (state 1);

[0018] Figure 5 It is a practical working schematic diagram of the present invention (state 2);

[0019] Figure 6 It is a structural schematic diagram of an external injection type joint injection mold;

[0020] Figure 7 This is a schematic diagram of the structure of an internal injection type continuous injection mold.

[0021] In the figure: 1, frame; 2, holding mechanism; 210, first oil cylinder; 220, universal joint; 230, pressing block;

[0022] 3. Material blocking mechanism; 310. Guide support; 320. Second oil cylinder; 330. Material blocking rod;

[0023] 4. Height adjustment mechanism; 410. Gear steering box; 420. Rocker plate; 430. Screw lift;

[0024] 5. Material guide block; 6. Material feeding mechanism; 7. Material guide channel; 8. Mounting bracket; 9. Guide shaft; 10. Guide sleeve; 11. Injection nozzle; 12. Driving cylinder; 13. Injection hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Provides such as Figure 1-3 The structure of a single injection head and multiple injections of a shoe-making machine with uppers shown in the figure comprises a mounting bracket 8 hingedly mounted on a frame 1, a feeding mechanism 6 slidably mounted on the mounting bracket 8 and driven to translate by a driving cylinder 12, an injection nozzle 11 is arranged at the discharge port of the feeding mechanism 6, and a height adjustment mechanism 4 for driving the lever-type mounting bracket 8 to rise and fall is arranged on the frame 1;

[0027] The injection nozzle 11 has two states, one is adapted to the external injection type upper shoe injection molding state, at this time the discharge port of the injection nozzle 11 is horizontally arranged, and the other is adapted to the internal injection type upper shoe injection molding state, at this time the discharge port of the injection nozzle 11 is vertically arranged.

[0028] When adapted to the inner injection type upper shoe injection molding state, a holding mechanism 2 for driving the injection nozzle 11 downward is arranged above the injection nozzle 11. At this time, the feed port end of the injection nozzle 11 is connected to the discharge port of the feeding mechanism 6, and a material blocking mechanism 3 is arranged inside the injection nozzle 11.

[0029] like Figure 6 The injection hole of the external injection type upper injection mold shown is on the side of the shoe mold. Figure 7 The injection hole of the inner injection type upper injection mold shown is above the shoe last, which meets the requirements of two different injection molds.

[0030] like Figure 5 As shown, when feeding the external injection type upper injection mold, the height adjustment mechanism 4 adjusts the height of the mounting bracket 8 to a low position, and the horizontal injection nozzle 11 is fixedly installed to the discharge end of the feeding mechanism 6, and the discharge port of the horizontal injection nozzle 11 is directly aligned with the feed port of the external injection type upper injection mold. Under the drive of the driving cylinder 12, the injection mechanism can reciprocately inject the molten sole material into the external injection type upper injection mold;

[0031] like Figure 4 As shown in the figure, when feeding the inner injection type continuous injection mold, the height adjustment mechanism 4 adjusts the height of the mounting bracket 8 to a high position, drives the oil cylinder 12 to push the feeding mechanism 6 to translate, and fixes the guide block 5 at the upper end of the vertically arranged injection nozzle 11 to the output end of the feeding mechanism 6, and communicates with the injection nozzle 11 through the internal guide channel 7, and the discharge port of the vertical injection nozzle 11 is directly above the feed port of the inner injection type continuous injection mold, and the first oil cylinder 210 of the holding mechanism 2 pushes the lever type mounting bracket One end is pressed downward, so that the discharge port of the vertical injection nozzle 11 is pressed against the injection hole end above the shoe last. Driven by the holding mechanism 2, the vertical injection nozzle 11 performs vertical swinging motion. The vertical injection nozzle 11 can cyclically inject molten sole material into the inner injection type upper injection mold, and integrate the horizontal injection and vertical injection mechanisms to ensure that the equipment can be applied to the injection molding requirements of the two upper injection molds. It has stronger applicability, reduces industrial production design costs, and saves resources.

[0032] The material blocking mechanism 3 includes a guide support 310, a second oil cylinder 320 fixedly mounted on the guide support 310, and a material blocking rod 330 fixedly mounted on the output end of the second oil cylinder 320. One end of the material blocking rod 330 is inserted into the injection nozzle 11 and has two states with the material outlet of the injection nozzle 11.

[0033] The first is the closed state of the discharge port where the end side wall of the blocking rod 330 is attached to the inner wall of the discharge port of the injection nozzle 11, and the second oil cylinder 320 is extended; the second is the open state of the discharge port where the end side wall of the blocking rod 330 is separated from the inner wall of the discharge port of the injection nozzle 11, and the second oil cylinder 320 is retracted. The second oil cylinder 320 of the blocking mechanism 3 retracts, the end side wall of the blocking rod 330 is separated from the inner wall of the discharge port of the injection nozzle 11, the discharge port is opened, and the discharge port of the injection nozzle 11 is pushed open. At this time, the hot melt plastic in the hopper of the feeding mechanism 6 enters the injection nozzle 11 through the conveying pipe of the spiral clinker mechanism and the guide channel 7 of the guide block 5, and the injection molding operation is performed;

[0034] After the injection molding is completed, the second oil cylinder 320 extends, and the side wall of the end of the material blocking rod 330 fits against the inner wall of the discharge port of the injection nozzle 11, closing the discharge port of the injection nozzle 11. The downward pressure mechanism drives the pressure block 230 to rise. Since the weight of the injection molding mechanism is less than that of the feeding mechanism 6, the injection molding mechanism is tilted, and the injection nozzle 11 is separated from the injection hole.

[0035] The holding mechanism 2 includes a first oil cylinder 210 which is inverted and fixedly mounted on the upper end of the guide block 5 through a bracket, and a pressure block 230 which is connected to the output end of the first oil cylinder 210 through a universal joint 220. By setting the universal joint 220 to connect the output end and the pressure block 230, a stable vertical pressure is output to promote the vertically mounted injection nozzle 11 to move downward smoothly.

[0036] The height adjustment mechanism 4 includes a gear steering box 410 fixedly mounted on the lower side of the mounting bracket 8, a hand-cranked turntable 420 fixedly connected to the output shaft of the gear steering box 410, and a screw lift 430 arranged between the mounting bracket 8 and the frame 1. The input shaft of the screw lift 430 is fixed to the output shaft of the gear steering box 410 through a universal coupling, the screw part of the screw lift 430 is relatively vertically fixedly mounted on the upper end surface of the frame 1, and the lifting shell of the screw lift 430 is fixedly connected to the mounting bracket 8. By rotating the hand-cranked turntable 420, the driving shaft of the gear steering box 410 is driven to rotate, thereby driving multiple transmission shafts to start deflecting, and the transmission shaft of the gear steering box 410 drives the worm of the screw lift 430 to rotate through the universal coupling, so that its lifting shell pushes the mounting bracket 8 to rise and fall, and adjusts the height, thereby adapting to the injection molding operation of the injection holes of the lasts with different levels of height, and the applicability is stronger.

[0037] A set of guide shafts 9 are arranged relatively parallel on the mounting bracket 8, and a guide sleeve 10 is fixedly installed at the lower end of the feeding mechanism 6, and the guide sleeve 10 is sleeved on the guide shaft 9. The stability of the translational movement of the feeding structure is strengthened.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A structure of a single injection head with multiple injections for a shoe-making machine with uppers, characterized in that: The invention comprises a mounting bracket (8) hingedly mounted on a frame (1), a feeding mechanism (6) slidably mounted on the mounting bracket (8) and driven to move in translation by a driving cylinder, an injection nozzle (11) being arranged at a discharge port of the feeding mechanism (6), and a height adjustment mechanism (4) for driving the lever-type mounting bracket (8) to rise and fall being arranged on the frame (1); The injection nozzle (11) has two replaceable forms, one of which is adapted to the external injection type upper shoe injection molding state, in which case the discharge port of the injection nozzle (11) is arranged horizontally, and the other is adapted to the internal injection type upper shoe injection molding state, in which case the discharge port of the injection nozzle (11) is arranged vertically; When the injection molding state of the shoe with upper is adapted, a holding mechanism (2) for driving the injection nozzle (11) to press downward is arranged above the injection nozzle (11), at which time the feed port end of the injection nozzle (11) is connected to the discharge port of the feeding mechanism (6), and a material blocking mechanism (3) is arranged inside the injection nozzle (11); The material blocking mechanism (3) comprises a guide support (310), a second oil cylinder (320) fixedly mounted on the guide support (310), and a material blocking rod (330) fixedly mounted on the output end of the second oil cylinder (320); one end of the material blocking rod (330) is inserted into the injection nozzle and has two states with the material outlet of the injection nozzle; The first is a closed state of the discharge port in which the end side wall of the blocking rod (330) is in contact with the inner wall of the discharge port of the injection nozzle (11), and the second oil cylinder (320) is extended; the second is an open state of the discharge port in which the end side wall of the blocking rod (330) is separated from the inner wall of the discharge port of the injection nozzle (11), and the second oil cylinder (320) is retracted; The holding mechanism (2) comprises a first oil cylinder (210) which is inverted and fixedly mounted on the upper end of the guide block (5) via a bracket, and a pressing block (230) which is connected to the output end of the first oil cylinder (210) via a universal joint (220); A material guide block (5) is fixedly mounted on the output end of the feeding mechanism (6) by means of bolts, and a material guide channel (7) is provided inside the material guide block (5) and is connected to the outlet end of the feeding mechanism (6). The injection nozzle (11) is vertically fixedly mounted on the lower end of the material guide block and is connected to the material guide channel.

2. The structure of a single injection head and multiple injections of a shoe-making machine with uppers according to claim 1, characterized in that: The height adjustment mechanism (4) comprises a gear steering box (410) fixedly mounted on the lower side of the mounting bracket (8), a hand-cranked turntable (420) fixedly connected to the output shaft of the gear steering box (410), and a screw lift (430) arranged between the mounting bracket (8) and the frame (1), wherein the input shaft of the screw lift (430) is fixed to the output shaft of the gear steering box (410) via a universal joint, the screw portion of the screw lift (430) is relatively vertically fixedly mounted on the upper end surface of the frame (1), and the lifting shell of the screw lift (430) is fixedly connected to the mounting bracket (8).

3. The structure of a single injection head and multiple injections of a shoe-making machine with uppers according to claim 2, characterized in that: A group of guide shafts (9) are relatively parallelly arranged on the mounting bracket (8), and a guide sleeve (10) is fixedly installed at the lower end of the feeding mechanism (6), and the guide sleeve (10) is sleeved on the guide shaft (9).

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