A glue melting mechanism of an injection molding machine

Abstract

The application discloses a glue melting mechanism of an injection molding machine and relates to the technical field of injection molding machines.The glue melting mechanism of the injection molding machine comprises a feeding assembly and a glue melting assembly, the feeding assembly is arranged on a head plate, the feeding assembly comprises a feeding hopper, a cloth tube and an extrusion assembly, the lower end of the feeding hopper is provided with a discharging pipe, the upper end of the cloth tube is fixedly connected with the upper end of the inclined conical surface of the feeding hopper, the lower end of the cloth tube is located in the pipe opening of the discharging pipe, the extrusion assembly comprises an extrusion driving element and a main extrusion protrusion, the outer convex surface of the main extrusion protrusion is in frictional abutment with the cloth tube, the extrusion driving element is used for driving the main extrusion protrusion to reciprocate along the inclined direction of the feeding hopper, the lower end of the cloth tube is provided with a counterweight assembly, and the counterweight assembly is located in the discharging pipe; the feeding assembly comprises a glue melting tube and a heating element, the heating element is arranged outside the glue melting tube, a feeding port is formed in the head plate, and the lower end of the discharging pipe is in communication with the glue melting tube through the feeding port; the glue melting mechanism of the injection molding machine effectively prevents the bridging of materials in the feeding hopper and guarantees the continuity of the glue.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of injection molding machines, and particularly relates to a glue melting mechanism of an injection molding machine. BACKGROUND

[0002] The injection molding machine is also called an injection molding machine or an injection machine. It is the main molding equipment for making various plastic products by using a plastic molding mold to make thermoplastic or thermosetting plastic into various shapes. The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and make it fill the mold cavity.

[0003] When the plastic particle raw material is transported from the hopper to the injection cylinder, the bridging and arching phenomenon is easily caused due to the poor flowability and irregular shape of the particle material, that is, there is still material on the upper part of the hopper, but the lower part is empty, which causes the material in the hopper to stop flowing and causes unstable feeding, thereby affecting the continuity of glue melting. SUMMARY

[0004] The purpose of the application is to provide a glue melting mechanism of an injection molding machine which is simple in structure and reasonable in design to solve the above problems.

[0005] The application achieves the above-mentioned purpose by the following technical scheme:

[0006] A glue melting mechanism of an injection molding machine comprises:

[0007] A feeding assembly is arranged on the head plate, and the feeding assembly comprises a feeding hopper, a cloth cylinder and an extrusion assembly. The lower end of the feeding hopper is provided with a discharging pipe, the cloth cylinder is arranged in the feeding hopper, the upper end of the cloth cylinder is fixedly connected with the upper end of the inclined conical surface of the feeding hopper, and the lower end of the cloth cylinder is located in the pipe opening of the discharging pipe. The extrusion assembly comprises an extrusion driving member and a main extrusion protrusion. The output end of the extrusion driving member is drivingly connected with the main extrusion protrusion. The main extrusion protrusion is located between the feeding hopper and the cloth cylinder, and the outer convex surface of the main extrusion protrusion is in frictional abutment with the cloth cylinder. The extrusion driving member is used to drive the main extrusion protrusion to reciprocate along the inclined direction of the feeding hopper. The lower end of the cloth cylinder is provided with a counterweight assembly, and the counterweight assembly is located in the discharging pipe.

[0008] A glue melting assembly comprises a glue melting cylinder and a heating member. The heating member is arranged outside the glue melting cylinder and is used to melt and heat the material in the glue melting cylinder. The glue melting cylinder is mounted on the head plate, and a feeding port is formed in the head plate. The lower end of the discharging pipe is in communication with the glue melting cylinder through the feeding port.

[0009] As a further optimization scheme of the application, the outer side of the feeding hopper is further provided with an outer shell, and the extrusion assembly is located between the feeding hopper and the outer shell.

[0010] As a further optimization scheme of the present application, the extrusion driving member comprises a first motor, a slide rail, a transmission screw rod and a sliding block, the output end of the first motor is transmissionally connected with the transmission screw rod, the transmission screw rod is rotationally installed on the slide rail, the slide rail is installed on the outer inclined surface of the feeding hopper, the sliding block is sleeved on the transmission screw rod and is in sliding connection with the slide rail, one end of the sliding block towards the one end of the cloth tube penetrates the feeding hopper, the feeding hopper is provided with a sliding groove, the sliding block is in sliding connection with the feeding hopper through the sliding groove, the extension direction of the sliding groove is consistent with the inclination direction of the feeding hopper, and the one end of the sliding block in the feeding hopper is fixedly connected with a main extrusion protruding block.

[0011] As a further optimization scheme of the present application, the main extrusion protruding block is rotationally embedded with a secondary extrusion protruding block, and the surface of the secondary extrusion protruding block is in frictional abutment with the cloth tube.

[0012] As a further optimization scheme of the present application, the counterweight assembly comprises a winding member, a limiting roller, a traction rope, a cloth belt and a counterweight block, the winding member is installed outside the discharging pipe, the output end of the winding member is fixedly connected with one end of the traction rope, the communication part of the discharging pipe and the feeding hopper is provided with a boss, the boss is provided with an inner cavity, the limiting roller is rotationally installed in the inner cavity of the boss, the other end of the traction rope passes through the limiting roller and is fixedly connected with the counterweight block, one end of the cloth belt is fixedly connected with the lower end of the cloth tube, the other end of the cloth belt is fixedly connected with the counterweight block, and the part of the traction rope in the discharging pipe is penetrated on the cloth belt in a needle-and-thread penetrating method, wherein the counterweight assembly is provided with multiple groups, the multiple groups of counterweight assemblies are distributed in a circumferential direction, and a supporting ring is arranged between adjacent counterweight blocks.

[0013] As a further optimization scheme of the present application, the bending extension part of the cloth belt is embedded with an elastic plate.

[0014] As a further optimization scheme of the present application, along the radial direction of the discharging pipe, the length between adjacent penetrating positions of the cloth belt on the inner side of the traction rope is greater than the length between adjacent penetrating positions of the cloth belt on the outer side of the traction rope.

[0015] As a further optimization scheme of the present application, the glue melting assembly further comprises a screw rod, a first belt transmission assembly and a second motor, the output end of the second motor is transmissionally connected with the driving transmission wheel of the first belt transmission assembly, the output end of the driven transmission wheel of the first belt transmission assembly is transmissionally connected with the screw rod, and the output end of the screw rod extends into the glue melting cylinder.

[0016] As a further optimization scheme of the present application, the head plate is installed on the moving frame, the moving frame is further provided with a tail plate, a pull rod is arranged between the head plate and the tail plate, one end of the pull rod is fixedly connected with the head plate, the other end of the pull rod is fixedly connected with the tail plate, a sliding seat is slidably sleeved on the pull rod, and the second motor and the first belt transmission assembly are respectively installed on the sliding seat.

[0017] The glue melting mechanism further comprises a glue injection assembly, the glue injection assembly comprises a third motor, a second belt transmission assembly, a ball screw, a ball nut and a movable glue injection plate, the movable glue injection plate is fixedly installed on the sliding seat, a ball nut is fixedly installed at an end of the movable glue injection plate away from the screw rod, the ball nut is sleeved on the ball screw, the input end of the ball screw is in transmission connection with the driven transmission wheel of the second belt transmission assembly, the input end of the driving transmission wheel of the second belt transmission assembly is in transmission connection with the third motor, and the third motor and the second belt transmission assembly are respectively installed on the tail plate, wherein a guide rail is further arranged on the moving frame, and the lower end of the sliding seat is in sliding connection with the guide rail.

[0018] As a further optimization scheme of the present application, an isolation cover is further installed on the glue melting cylinder, the isolation cover is located at the side of the heating element away from the glue melting cylinder, and a protective cover is fixedly installed at the side of the isolation cover away from the glue melting cylinder.

[0019] The present application has at least the following advantages: the glue melting mechanism of the injection molding machine provided by the present application comprises a feeding assembly and a glue melting assembly, the feeding assembly comprises a feeding hopper, a cloth cylinder and an extrusion assembly, a discharging pipe is arranged at the lower end of the feeding hopper, the cloth cylinder is arranged in the feeding hopper, the reciprocating movement of the main extrusion protrusion in the extrusion assembly realizes the extrusion of the cloth cylinder, due to the flexibility of the cloth cylinder itself, the material in the cloth cylinder is extruded up and down, the flowability of the material is improved, the bridging and arching phenomenon is prevented, the stability of the feeding is realized, and the continuous conveying of the material to the glue melting cylinder is ensured.

[0020] Moreover, the counterweight assembly comprises a winding member, a limiting roller, a traction rope, a cloth belt and a counterweight, under the winding of the winding member, the traction rope is tightened, at this time, the cloth belt is folded up, the cloth belt has no dragging force on the cloth cylinder, by releasing the winding member, the traction rope is pulled down by the counterweight, the cloth belt is straightened, the straightened cloth belt pulls down the lower end of the cloth cylinder, the cloth cylinder at the corresponding position of the cloth belt is straightened, the material on the cloth cylinder is lifted up, and when the winding member is started again to tighten the traction rope, the cloth cylinder is pressed down again by the material and abuts against the feeding hopper, the whole process realizes the lifting and lowering of the material in the cloth cylinder, and the flowability of the material is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present application;

[0022] Figure 2 is a schematic diagram of the overall structure of the present application; Figure 1 is a schematic diagram of the front structure of the present application;

[0023] Figure 3 is an enlarged view of A in the present application; Figure 2

[0024] Figure 4 ​is a partial sectional structure schematic view of the feeding assembly of the present application;

[0025] Figure 5 is a further sectional structure schematic view of the feeding assembly of the present application;

[0026] Figure 6 is an enlarged view at B in the present application Figure 5

[0027] Figure 7 is an enlarged view at C in the present application Figure 5

[0028] Figure 8 is a partial structure schematic view of the tape, traction rope and weight of the present application;

[0029] Figure 9 is a sectional structure schematic view of the weight, support ring and downpipe of the present application;

[0030] Figure 10 is a partial structure schematic view of the glue melting assembly, glue shooting assembly and shooting platform assembly of the present application.

[0031] Fig. 1 is a feeding assembly; 11 is a feeding hopper; 12 is a shell; 13 is a downpipe; 131 is a winding member; 132 is a limiting roller; 133 is a boss; 134 is a tape; 135 is a traction rope; 136 is a weight; 137 is a support ring; 14 is a support; 15 is a limiting seat; 16 is a carrier; 17 is an extruding assembly; 171 is a first motor; 172 is a sliding rail; 173 is a transmission screw; 174 is a sliding block; 175 is a main extruding boss; 176 is a vice extruding boss; 18 is a tape tube;

[0032] 2 is a glue melting assembly; 21 is a screw; 22 is a first belt transmission assembly; 23 is a second motor; 24 is a glue melting tube; 241 is a feeding port; 25 is a heating member; 26 is an isolating cover; 27 is a protective cover; 28 is a sliding seat;

[0033] 3 is a glue shooting assembly; 31 is a third motor; 32 is a second belt transmission assembly; 33 is a ball screw; 34 is a ball nut; 35 is a glue shooting movable plate; 36 is a guide rail;

[0034] 41 is a head plate; 411 is a feeding port; 42 is a moving frame; 43 is a tail plate; 44 is a pull rod;

[0035] 5 is a fixed die. DETAILED DESCRIPTION

[0036] ​​The application will be described in further detail below with reference to the drawings, it is necessary to point out here that the following specific embodiments are only used to further illustrate the application, and cannot be understood as limiting the scope of protection of the application, and those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0037] As shown in Figure 1 , Figure 2 , Figure 5 and Figure 6 , the application provides a glue melting mechanism of an injection molding machine, comprising:

[0038] The feeding assembly 1 is arranged on the head plate 41, and the feeding assembly 1 comprises a feeding hopper 11, a cloth barrel 18 and an extruding assembly 17. The lower end of the feeding hopper 11 is provided with a discharging pipe 13, the cloth barrel 18 is arranged in the feeding hopper 11, the upper end of the cloth barrel 18 is fixedly connected with the upper end of the inclined conical surface of the feeding hopper 11, and the lower end of the cloth barrel 18 is located in the pipe opening of the discharging pipe 13. The extruding assembly 17 comprises an extruding driving member and a main extruding protrusion 175. The output end of the extruding driving member is drivingly connected with the main extruding protrusion 175. The main extruding protrusion 175 is located between the feeding hopper 11 and the cloth barrel 18, and the outer convex surface of the main extruding protrusion 175 is in frictional abutment with the cloth barrel 18. The extruding driving member is used to drive the main extruding protrusion 175 to reciprocate along the inclined direction of the feeding hopper 11. The lower end of the cloth barrel 18 is provided with a counterweight assembly, and the counterweight assembly is located in the discharging pipe 13.

[0039] The glue melting assembly 2 comprises a glue melting barrel 24 and a heating member 25. The heating member 25 is arranged outside the glue melting barrel 24, and is used to melt and heat the material in the glue melting barrel 24. The glue melting barrel 24 is installed on the head plate 41, and the head plate 41 is provided with a feeding opening 411. The lower end of the discharging pipe 13 is communicated with the glue melting barrel 24 through the feeding opening 411.

[0040] As shown in Figure 3 , the glue melting barrel 24 is provided with a feeding opening 241, the feeding opening 241 is communicated with the feeding opening 411, and the material can enter the glue melting barrel 24 through the feeding opening 411 and the feeding opening 241 in sequence.

[0041] In the above embodiment, by arranging the cloth tube 18 in the feeding hopper 11, when the plastic particle material is fed into the feeding hopper 11, the material presses the cloth tube 18 to adhere to the inner wall of the feeding hopper 11. At this time, by the driving of the extrusion driving element, the main extrusion protrusion 175 is driven to reciprocate, and the cloth tube 18 is extruded. Due to the flexibility of the cloth tube 18 itself, the material in the cloth tube 18 is extruded up and down, the flowability of the material is improved, the bridging and arching phenomenon is prevented, the stability of the feeding is realized, and the material is continuously conveyed to the glue melting cylinder 24. It should be noted that the lower end of the cloth tube 18 is prevented from exiting the feeding pipe 13 by the counterweight assembly.

[0042] It should be noted that, as shown in Figure 4 , the extrusion assembly 17 is provided with a plurality of, for example, the number of extrusion assemblies 17 is six, seven, eight, etc. The plurality of extrusion assemblies 17 are evenly distributed circumferentially on the feeding hopper 11 to extrude the cloth tube 18 at multiple points to ensure the flowability of the material in the cloth tube 18.

[0043] As shown in Figure 4 , the outer side of the feeding hopper 11 is further provided with a shell 12, wherein the extrusion assembly 17 is located between the feeding hopper 11 and the shell 12, so that the overall equipment appearance is neat, and the operation of the extrusion assembly 17 is effectively prevented from being disturbed by the outside. In order to improve the material falling difference, a carrier 16 and a support 14 are further arranged below the feeding pipe 13, the support 14 is located between the carrier 16 and the head plate 41, the lower end of the feeding pipe 13 has a limiting seat 15, the limiting seat 15 is arranged on the carrier 16, the feeding port 411 penetrates the support 14, the carrier 16 and the limiting seat 15 in turn and communicates with the lower end of the feeding pipe 13, wherein the lower end of the shell 12 is lapped on the limiting seat 15.

[0044] For example, referring to Figure 5 and Figure 6 , the extrusion driving element includes a first motor 171, a sliding rail 172, a transmission screw rod 173 and a sliding block 174. The output end of the first motor 171 is transmissionally connected with the transmission screw rod 173, the transmission screw rod 173 is rotationally installed on the sliding rail 172, the sliding rail 172 is installed on the outer inclined surface of the feeding hopper 11, the sliding block 174 is sleeved on the transmission screw rod 173 and is slidingly connected with the sliding rail 172, one end of the sliding block 174 towards the cloth tube 18 penetrates the feeding hopper 11, the feeding hopper 11 is provided with a sliding groove, the sliding block 174 is slidingly connected with the feeding hopper 11 through the sliding groove, wherein the extension direction of the sliding groove is consistent with the inclination direction of the feeding hopper 11, and one end of the sliding block 174 in the feeding hopper 11 is fixedly connected with the main extrusion protrusion 175.

[0045] Under the driving of the first motor 171, the transmission screw rod 173 drives the sliding block 174 to move back and forth along the sliding rail 172, so that the sliding block 174 drives the main extrusion block 175 to move back and forth along the inclined direction of the feeding hopper 11, so as to realize the repeated extrusion of the main extrusion block 175 to the cloth tube 18.

[0046] Continuing to refer to Figure 6 , the secondary extrusion block 176 is rotatably embedded in the main extrusion block 175, and the surface of the secondary extrusion block 176 is in frictional abutment with the cloth tube 18, so that the rolling friction of the secondary extrusion block 176 replaces the sliding friction, reducing the running resistance.

[0047] Exemplarily, continuing to refer to Figure 7 , Figure 8 and Figure 9 , the counterweight assembly includes a winding member 131, a limiting roller 132, a traction rope 135, a cloth belt 134 and a counterweight block 136, the winding member 131 is installed outside the downcomer 13, the output end of the winding member 131 is fixedly connected with one end of the traction rope 135, the communication part of the downcomer 13 and the feeding hopper 11 is provided with a boss 133, the boss 133 is provided with an inner cavity, the limiting roller 132 is rotatably installed in the inner cavity of the boss 133, the other end of the traction rope 135 passes through the limiting roller 132 and is fixedly connected with the counterweight block 136, one end of the cloth belt 134 is fixedly connected with the lower end of the cloth tube 18, the other end of the cloth belt 134 is fixedly connected with the counterweight block 136, and the part of the traction rope 135 located in the downcomer 13 is threaded on the cloth belt 134 by the needle and thread method, wherein the counterweight assembly is provided with multiple groups, the multiple groups of counterweight assemblies are distributed in the circumferential direction, and a supporting ring 137 is arranged between adjacent counterweight blocks 136.

[0048] In the above embodiment, the winding member 131 is started, the traction rope 135 is tightened, as shown in Figure 7 , the cloth belt 134 is folded up, at this time, the cloth belt 134 has no dragging force on the cloth tube 18, and the cloth tube 18 is pressed on the inner wall of the feeding hopper 11 by the material; then the winding member 131 is released, the counterweight block 136 is lowered under its own gravity and the downward pressure of the material, the traction rope 135 is pulled down, so that the cloth belt 134 is straightened, and the straightened cloth belt 134 pulls the lower end of the cloth tube 18, as shown in Figure 6 and Figure 7 , at this time, the cloth tube 18 at the corresponding position of the cloth belt 134 is straightened, so that the material on the cloth tube 18 is lifted up, and when the winding member 131 is started again, the folded cloth belt 134 releases the downward pulling force on the cloth tube 18, so that the material again presses the cloth tube 18, thereby realizing an action of lifting up and then lowering down the material in the cloth tube 18, so as to ensure the flowability of the material.

[0049] Moreover, as Figure 7As shown, the elastic plate is embedded in the bending extension of the cloth tape 134, and along the radial direction of the downcomer 13, the length of the cloth tape 134 between the adjacent threading positions inside the traction rope 135 is greater than the length of the cloth tape 134 between the adjacent threading positions outside the traction rope 135. When the cloth tape 134 is in the storage position, the elastic plate can be deformed in the radial direction when the material particles in the downcomer 13 press the cloth tape 134, that is, the radial dimension of the downcomer 13 changes, and Figure 9 As shown, along the radial direction of the downcomer 13, the outer arc end surface of the supporting ring 137 and the outer arc end surface of the counterweight 136 respectively abut the inner wall of the downcomer 13, and by moving the counterweight 136 along the axial line of the downcomer 13, the blockage of the material in the downcomer 13 is effectively prevented.

[0050] It should be noted that, continuing to refer to Figure 2 , Figure 3 and Figure 10 , the glue melting assembly 2 further comprises a screw 21, a first belt drive assembly 22, and a second motor 23. The output end of the second motor 23 is drivingly connected to the driving pulley of the first belt drive assembly 22. The output end of the driven pulley of the first belt drive assembly 22 is drivingly connected to the screw 21. The output end of the screw 21 extends into the glue melting cylinder 24. The rotation of the screw 21 is realized by the driving of the second motor 23 and the transmission of the first belt drive assembly 22, so as to push the material falling into the spiral groove formed between the screw 21 and the glue melting cylinder 24 forward.

[0051] Continuing to refer to Figure 10 , the head plate 41 is installed on the moving frame 42. The moving frame 42 further has a tail plate 43 installed thereon. A pull rod 44 is arranged between the head plate 41 and the tail plate 43. One end of the pull rod 44 is fixedly connected to the head plate 41. The other end of the pull rod 44 is fixedly connected to the tail plate 43. A sliding seat 28 is slidingly sleeved on the pull rod 44. The second motor 23 and the first belt drive assembly 22 are respectively installed on the sliding seat 28.

[0052] The glue melting mechanism further comprises a glue injecting assembly 3. The glue injecting assembly 3 comprises a third motor 31, a second belt drive assembly 32, a ball screw 33, a ball nut 34, and a glue injecting movable plate 35. The glue injecting movable plate 35 is fixedly installed on the sliding seat 28. The ball nut 34 is fixedly installed on the end of the glue injecting movable plate 35 away from the screw 21. The ball nut 34 is sleeved on the ball screw 33. The input end of the ball screw 33 is drivingly connected to the driven pulley of the second belt drive assembly 32. The input end of the driving pulley of the second belt drive assembly 32 is drivingly connected to the third motor 31. The third motor 31 and the second belt drive assembly 32 are respectively installed on the tail plate 43. The moving frame 42 further has a guide rail 36 arranged thereon. The lower end of the sliding seat 28 is slidingly connected to the guide rail 36.

[0053] Through the driving of the third motor 31, the driving of the second belt transmission assembly 32, the driving of the ball screw 33 by the ball nut 34, the forward movement of the injection glue movable plate 35 by the sliding seat 28, and the movement of the screw rod 21 along the glue melting cylinder 24, the molten plastic is injected into the fixed mold 5 through the injection nozzle of the glue melting cylinder 24, and the injection molding of the mold is realized.

[0054] As shown in Figure 2 and Figure 3 , the glue melting cylinder 24 is also provided with an isolation cover 26, which is located away from the heating element 25 of the glue melting cylinder 24. The isolation cover 26 is fixedly installed with a protective cover 27 away from the glue melting cylinder 24, so as to effectively isolate the heating element 25 and prevent the staff from contacting the heating element 25 and causing burns, thereby ensuring the safety of the whole equipment.

[0055] It should be noted that the glue melting mechanism of the injection molding machine is used to pre-store the plastic particle material required for injection molding in the feeding hopper 11. At this time, the material is pressed against the cloth cylinder 18, and the sliding block 174 is driven by the first motor 171 to drive the main extrusion block 175 and the auxiliary extrusion block 176 to reciprocate, so as to extrude the cloth cylinder 18. Due to the flexibility of the cloth cylinder 18 itself, the material in the cloth cylinder 18 is extruded up and down, the flowability of the material is improved, the bridging and arching phenomenon is prevented, the stability of the feeding is realized, and the continuous conveying of the material to the glue melting cylinder 24 is ensured.

[0056] In addition, the winding element 131 is started, the traction rope 135 is tightened, and the cloth belt 134 is stacked. At this time, the cloth belt 134 has no dragging force on the cloth cylinder 18, and the cloth cylinder 18 is pressed against the inner wall of the feeding hopper 11 by the material. Then the winding element 131 is released, the counterweight 136 is pressed downward by its own gravity and the material, the traction rope 135 is pulled downward, the cloth belt 134 is straightened, and the straightened cloth belt 134 pulls the lower end of the cloth cylinder 18, as shown by the dashed line position in Figure 6 and Figure 7 , at this time, the cloth cylinder 18 at the corresponding position of the cloth belt 134 is straightened, the material on the cloth cylinder 18 is lifted, and when the winding element 131 is started again, the stacked cloth belt 134 releases the downward pulling force on the cloth cylinder 18, so that the material presses the cloth cylinder 18 again, thereby realizing the action of lifting the material on the cloth cylinder 18 and then releasing it, ensuring the flowability of the material. It should be noted that the straightened cloth cylinder 18 still rubs against the auxiliary extrusion block 176.

[0057] The material particles enter the glue melting cylinder 24 through the discharging pipe 13, the feeding port 411 and the feeding port 241 in turn. At this time, the first belt driving assembly 22 drives the screw 21 to rotate under the driving of the second motor 23, so as to push the material falling into the spiral groove forward to accept the heating and melting treatment of the heating member 25. Then, the third motor 31 is started, the second belt driving assembly 32 drives the ball screw 33, the ball nut 34 drives the glue injection movable plate 35 to move to the left (for example, in the direction shown in the figure), so as to make the screw 21 inject the molten plastic from the injection nozzle of the glue melting cylinder 24 into the mold cavity between the fixed mold 5 and the movable mold (not shown in the figure) ; Figure 2

[0058] Then, the third motor 31 is reversely driven, the screw 21 is finally moved to the right to retreat, and the second motor 23 is driven again to make the screw 21 rotate to feed again.

[0059] The above-mentioned embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that, for the ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.​

Claims

1. A melting mechanism for an injection molding machine, characterized in that, include: The feeding assembly (1) is mounted on the head plate (41). The feeding assembly (1) includes a feeding hopper (11), a cloth cylinder (18), and an extrusion assembly (17). The lower end of the feeding hopper (11) is provided with a discharge pipe (13). The cloth cylinder (18) is located inside the feeding hopper (11). The upper end of the cloth cylinder (18) is fixedly connected to the upper end of the inclined conical surface of the feeding hopper (11). The lower end of the cloth cylinder (18) is located in the opening of the discharge pipe (13). The extrusion assembly (17) includes an extrusion drive. The extrusion drive is connected to the main extrusion protrusion (175) at the output end of the extrusion drive. The main extrusion protrusion (175) is located between the feeding hopper (11) and the cloth cylinder (18), and the outer convex surface of the main extrusion protrusion (175) rubs against the cloth cylinder (18). The extrusion drive is used to drive the main extrusion protrusion (175) to move back and forth along the inclined direction of the feeding hopper (11). The lower end of the cloth cylinder (18) is provided with a counterweight assembly, which is located in the feed pipe (13). The melt assembly (2) includes a melt cylinder (24) and a heating element (25). The heating element (25) is disposed outside the melt cylinder (24) and is used to melt and heat the material inside the melt cylinder (24). The melt cylinder (24) is mounted on a head plate (41), and a feeding port (411) is provided inside the head plate (41). The lower end of the discharge pipe (13) is connected to the melt cylinder (24) through the feeding port (411). The counterweight assembly includes a winding component (131), a limiting roller (132), a traction rope (135), a fabric belt (134), and a counterweight block (136). The winding component (131) is installed outside the feed pipe (13), and the output end of the winding component (131) is fixedly connected to one end of the traction rope (135). A boss (133) is provided at the connection between the feed pipe (13) and the feeding hopper (11). An inner cavity is opened in the boss (133), and the limiting roller (132) is rotatably installed in the inner cavity of the boss (133). The other end of the traction rope (135) passes around the limiting roller (132) and is fixedly connected to the counterweight (136). One end of the cloth belt (134) is fixedly connected to the lower end of the cloth cylinder (18), and the other end of the cloth belt (134) is fixedly connected to the counterweight (136). The part of the traction rope (135) located in the feed tube (13) is threaded onto the cloth belt (134) by a needle threading method. There are multiple sets of counterweight components, which are distributed circumferentially. A support ring (137) is provided between adjacent counterweights (136).

2. The melting mechanism of an injection molding machine according to claim 1, characterized in that, The outer side of the feeding hopper (11) is also provided with a shell (12), wherein the extrusion assembly (17) is located between the feeding hopper (11) and the shell (12).

3. The melting mechanism of an injection molding machine according to claim 1, characterized in that, The extrusion drive includes a first motor (171), a slide rail (172), a transmission screw (173), and a slider (174). The output end of the first motor (171) is connected to the transmission screw (173). The transmission screw (173) is rotatably mounted on the slide rail (172). The slide rail (172) is mounted on the outer inclined surface of the feeding hopper (11). The slider (174) is fitted on the transmission screw (173) and slidably connected to the slide rail (172). The end of the slider (174) facing the cloth cylinder (18) passes through the feeding hopper (11). The feeding hopper (11) has a groove. The slider (174) is slidably connected to the feeding hopper (11) through the groove. The extension direction of the groove is consistent with the inclination direction of the feeding hopper (11). The end of the slider (174) located inside the feeding hopper (11) is fixedly connected to a main extrusion protrusion (175).

4. The melting mechanism of an injection molding machine according to claim 3, characterized in that, The main extrusion protrusion (175) has a secondary extrusion protrusion (176) rotatably embedded inside it, and the surface of the secondary extrusion protrusion (176) rubs against the cloth tube (18).

5. The melting mechanism of an injection molding machine according to claim 4, characterized in that, The bent extension portion of the fabric strip (134) is fitted with an elastic plate.

6. The melting mechanism of an injection molding machine according to claim 4, characterized in that, Along the radial direction of the feed tube (13), the length between adjacent threading parts of the fabric strip (134) inside the traction rope (135) is greater than the length between adjacent threading parts of the fabric strip (134) outside the traction rope (135).

7. The melting mechanism of an injection molding machine according to claim 1, characterized in that, The melt assembly (2) also includes a screw (21), a first belt drive assembly (22), and a second motor (23). The output end of the second motor (23) is driven to the drive wheel of the first belt drive assembly (22). The output end of the driven wheel of the first belt drive assembly (22) is driven to the screw (21). The output end of the screw (21) extends into the melt cylinder (24).

8. The melting mechanism of an injection molding machine according to claim 7, characterized in that, The head plate (41) is mounted on the moving frame (42), and the moving frame (42) is also mounted on the tail plate (43). A pull rod (44) is provided between the head plate (41) and the tail plate (43). One end of the pull rod (44) is fixedly connected to the head plate (41), and the other end of the pull rod (44) is fixedly connected to the tail plate (43). A slide block (28) is slidably sleeved on the pull rod (44). The second motor (23) and the first belt drive assembly (22) are respectively mounted on the slide block (28). The melting glue mechanism also includes a glue injection assembly (3), which includes a third motor (31), a second belt drive assembly (32), a ball screw (33), a ball screw nut (34), and a glue injection movable plate (35). The glue injection movable plate (35) is fixedly installed on the slide (28). The end of the glue injection movable plate (35) away from the screw (21) is fixedly installed with a ball screw nut (34). The ball screw nut (34) is fitted on the ball screw (33). The input end of the ball screw (33) is connected to the driven drive wheel of the second belt drive assembly (32). The input end of the drive drive wheel of the second belt drive assembly (32) is connected to the third motor (31). The third motor (31) and the second belt drive assembly (32) are respectively installed on the tail plate (43). The shift frame (42) is also provided with a guide rail (36). The lower end of the slide (28) is slidably connected to the guide rail (36).

9. The melting mechanism of an injection molding machine according to claim 1, characterized in that, An isolation cover (26) is also installed on the melting cylinder (24). The isolation cover (26) is located on the side of the heating element (25) away from the melting cylinder (24). A protective cover (27) is fixedly installed on the side of the isolation cover (26) away from the melting cylinder (24).

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