An injection molding machine electrofusion glue structure and control method

Abstract

The application discloses an injection molding machine electric melting glue structure and a control method. The injection molding machine electric melting glue structure comprises a rack, a control device arranged on the rack, a glue injection device and a driving device. The glue injection device is arranged above the driving device. A guide slide rail seat is arranged on the rack. The glue injection device is slidably connected with the guide slide rail seat. The driving device drives the glue injection device to move through a transmission assembly. The guide slide rail seat is provided with a guide through groove along the length direction. Parallel slide rails are arranged on both sides of the guide through groove. The glue injection device is arranged on the slide rails on both sides. The application improves the work efficiency and facilitates the control and monitoring of the operation of the injection molding machine electric melting glue structure.

Description

Technical Field

[0001] This invention belongs to the field of injection molding technology, specifically relating to an electrofusion structure and control method for injection molding machines. Background Technology

[0002] Injection molding machines are devices that melt plastic granules and apply high pressure to inject them into a mold cavity. Currently, the industry generally uses a hydraulic motor structure to melt the plastic. Specifically, in injection molding equipment, the motor is connected to an oil pump, which drives the oil pump to supply hydraulic oil through the oil circuit system to the hydraulic motor in the injection unit. The hydraulic motor drives the screw to rotate in the melting barrel via a drive shaft, melting the plastic granules that enter from the injection head plate inlet. However, the screw efficiency is relatively low, only about 73%. Furthermore, the control method of the existing electrofusion structure in injection molding machines has room for optimization. Therefore, it is necessary to propose a new electrofusion structure and a new control method for injection molding machines. Summary of the Invention

[0003] The purpose of this invention is to provide a novel electrofusion structure and control method for injection molding machines, which improves work efficiency and facilitates control and monitoring.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows:

[0005] In a first aspect, the present invention provides an electromelting structure for an injection molding machine, including a frame and a control device, an injection device and a drive device disposed on the frame;

[0006] The frame is provided with a guide slide rail seat, the guide slide rail seat is provided with a guide groove along the length direction, and parallel slide rails are provided on both sides of the guide groove;

[0007] The glue injection device includes a glue injection head plate assembly, a glue injection second plate assembly, a drive motor, a planetary reducer, a glue cylinder, and a glue injection screw. The bottom surface of the glue injection head plate assembly is slidably connected to the slide rail of the guide slide rail seat, and the bottom surface of the glue injection second plate assembly is also slidably connected to the slide rail of the guide slide rail seat. The glue injection second plate assembly is located behind the glue injection head plate assembly. The glue cylinder extends forward through the glue injection head plate assembly, with its inlet end facing the glue injection second plate. One end of the glue injection screw is embedded in the glue cylinder. The drive motor is connected to the planetary reducer, which is located behind the glue injection second plate assembly and connected to the other end of the glue injection screw via a transmission shaft. The drive motor drives the glue injection screw to rotate, thus achieving material feeding. The glue injection head plate assembly includes two sets of parallel glue injection cylinders, which are located on both sides of the glue cylinder. The piston rods of the two sets of glue injection cylinders are connected to the glue injection second plate assembly.

[0008] The drive device includes a servo oil pump and a hydraulic drive assembly. The hydraulic drive assembly is located below the injection head plate assembly and is connected to the servo oil pump through pipelines.

[0009] The control device is connected to the drive motor and the servo oil pump respectively.

[0010] Preferably, the hydraulic drive assembly includes a drive hydraulic cylinder and a fixing component. The drive hydraulic cylinder is located below the injection head plate assembly and is fixedly installed in the guide slot of the guide slide seat. The fixing component is provided on the bottom surface of the injection head plate assembly. The piston rod end of the drive hydraulic cylinder is connected to the fixing component. The drive hydraulic cylinder is connected to a servo oil pump through a pipeline. The servo oil pump controls the piston rod of the drive hydraulic cylinder to extend or retract. The injection cylinder is connected to the servo oil pump through a pipeline.

[0011] Preferably, the electrofusion structure of the injection molding machine further includes a positioning device, which includes a first detection plate, a second detection plate, and a plurality of first proximity switches and second proximity switches;

[0012] The two outer sides of the guide slide rail are respectively provided with positioning slots along the length direction. Multiple first detection plates are sequentially arranged back and forth in one of the positioning slots along the length direction of the guide slide rail, and multiple second detection plates are sequentially arranged back and forth in another positioning slot along the length direction of the guide slide rail.

[0013] The first fixing plate extends outward from the side of the injection head plate assembly on the same side as the first detection plate. The first proximity switch is located below the first fixing plate and faces the positioning slot on the same side. The second fixing plate assembly extends outward from the side of the injection second plate assembly on the same side as the second detection plate. The second proximity switch is located below the second fixing plate and faces the positioning slot on the same side.

[0014] More preferably, there are two first detection plates, one of which corresponds to the forward limit position of the injection head plate assembly, and the other corresponds to the backward limit position of the injection head plate assembly.

[0015] More preferably, there are two second detection plates, one of which corresponds to the melting position of the two-plate injection assembly, and the other corresponds to the injection position of the two-plate injection assembly.

[0016] Preferably, both the first detection plate and the second detection plate are detachably connected to the guide slide rail seat.

[0017] More preferably, scale lines are provided on the sides of the two positioning slots along the length direction, with the starting point of the scale lines close to the direction of the mold.

[0018] Preferably, there are two first detection plates and two second detection plates. The positioning device further includes a first adjusting motor group, a first lead screw assembly, a second adjusting motor group, and a second lead screw assembly.

[0019] The first adjusting motor group and the first lead screw assembly are on the same side as the first detection plate. The two first lead screw assemblies are connected end to end. The two first motors are respectively connected to the outer ends of the two first lead screw assemblies. The top of the first detection plate is provided with a first nut guide. The two first detection plates are respectively connected to the two first lead screw assemblies through the first nut guide.

[0020] The second adjusting motor group and the second lead screw assembly are on the same side as the second detection plate. The two second lead screw assemblies are connected end to end. The two second motors are respectively connected to the outer ends of the two second lead screw assemblies. The top of the second detection plate is provided with a second nut guide. The two second detection plates are respectively connected to the two second lead screw assemblies through the second nut guide.

[0021] In a second aspect, the present invention provides a method for controlling the electrosintering structure of an injection molding machine, as follows:

[0022] S1. Before the melting stage, the injection head plate assembly and the injection second plate assembly move forward as a whole. When the first proximity switch detects the first detection plate at the forward limit position and the second proximity switch detects the second detection plate at the melting position, it indicates that the injection head plate assembly and the injection second plate assembly have moved forward to their positions and the position of the injection head plate assembly is locked. At this time, the position of the injection second plate assembly is the melting position.

[0023] S2. In the melting stage, plastic granules enter the melting cylinder through the feed port of the injection head plate assembly, and are located between the melting cylinder and the melting screw. Then, the drive motor drives the melting screw to rotate, realizing forward feeding. The plastic granules are melted by friction and heating during the conveying process. Finally, the molten plastic enters the storage space for temporary storage.

[0024] S3. During the injection stage, the injection cylinder of the injection head plate assembly is activated, causing the second injection plate assembly to move towards the injection head plate assembly. The molten plastic screw injects the molten plastic into the mold. When the second proximity switch moves forward with the second injection plate assembly and detects the presence of the second detection plate at the injection position, it indicates that the second injection plate assembly has moved to the injection position and injection is achieved. Only then does the pressure holding stage begin.

[0025] S4. During the pressure holding stage, the second proximity switch always detects that the second injection plate assembly is in the injection position.

[0026] S5. After the pressure holding stage is completed, the second injection plate assembly moves backward. When the second proximity switch detects the second detection plate at the melt position again, it indicates that the second injection plate assembly has returned to the melt position. Repeat steps S2-S4 to complete the melting and injection.

[0027] S6. After the injection product production is completed, the injection head plate assembly and the injection second plate assembly retract and leave the mold. When the first proximity switch detects the first detection plate at the retraction limit position, it indicates that the injection head plate assembly and the injection second plate assembly have retracted into place and are ready for the next injection production.

[0028] In a third aspect, for the case of automatic adjustment of the first and second detection plates, the present invention also provides a method for controlling the electrofusion structure of an injection molding machine, as follows:

[0029] When changing product types, before the debugging phase, the two first detection boards are brought close to each other, and the two second detection boards are brought close to each other.

[0030] During the debugging phase, as the injection head plate assembly moves forward, the first detection plate corresponding to the forward limit position is detected by the first proximity switch and always follows the movement of the injection head plate assembly until a new forward limit position is determined. Then, the position of the first detection plate corresponding to the forward limit position is locked.

[0031] During the backward adjustment of the injection head plate assembly, the first detection plate corresponding to the backward limit position always follows the movement of the injection head plate assembly through the detection of the first proximity switch until a new backward limit position is determined, and then the position of the first detection plate corresponding to the backward limit position is locked.

[0032] During the forward adjustment of the injection plate assembly, the second detection plate corresponding to the injection position always follows the movement of the injection plate assembly through the detection of the second proximity switch until the new injection position is determined. Then the position of the second detection plate corresponding to the injection position is locked.

[0033] During the backward adjustment of the two-plate injection assembly, the second detection plate corresponding to the melt position is detected by the second proximity switch and always follows the movement of the two-plate injection assembly until the new melt position is determined. Then the position of the second detection plate corresponding to the melt position is locked.

[0034] Beneficial effects:

[0035] This invention achieves melting by driving a motor, improving the transmission efficiency of the melting screw and reducing the energy consumption of the injection molding machine. The control device controls the drive motor and servo oil pump to control the electromelting structure of the injection molding machine, realizing "one-to-two" operation, which helps to reduce costs.

[0036] This invention also uses proximity switches to detect the positions of the injection head plate assembly and the injection second plate assembly, solving the problem that existing injection molding machines cannot effectively monitor whether the equipment has moved into position. Attached Figure Description

[0037] Figure 1 The diagram shown is a schematic representation of the overall structure of the present invention.

[0038] Figure 2 The diagram shown is a frontal view of the present invention;

[0039] Figure 3 The diagram shown is a schematic diagram of the injection apparatus according to Embodiment 1 of the present invention;

[0040] Figure 4 The diagram shown is a partial schematic diagram of Embodiment 2 of the present invention;

[0041] Figure 5 The diagram shown is a partial schematic diagram of Embodiment 4 of the present invention.

[0042] Reference numerals: 1-frame, 2-injection device, 3-drive device, 4-control device;

[0043] 201-Melting cylinder, 202-Drive motor, 203-Planetary reducer, 204-Injection head plate assembly, 205-Injection second plate assembly, 206-Melting screw, 207-Injection cylinder, 208-Guide slide rail seat, 209-Guide slot, 210-First detection plate, 211-First proximity switch, 212-Second detection plate, 213-Second proximity switch, 214-First fixing plate, 215-Second fixing plate, 216-Positioning slot, 217-First lead screw assembly, 218-First bearing seat, 219-First motor, 220-First nut guide assembly. Detailed Implementation

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0045] This invention provides an electrofusion structure for an injection molding machine, including a frame 1 and a control device 4, an injection device 2, and a drive device 3 mounted on the frame 1, such as... Figure 1-3As shown, the injection device 2 is positioned above the drive device 3. A guide rail seat 208 is mounted on the frame 1, and the injection device 2 is slidably connected to the guide rail seat 208. The drive device 3 drives the injection device 2 to move via a transmission assembly. The guide rail seat 208 has a guide groove 209 along its length, and parallel slide rails are provided on both sides of the guide groove 209. The injection device 2 is mounted on the slide rails on both sides.

[0046] Example 1

[0047] The glue injection device 2 includes a glue injection head plate assembly 204, a glue injection second plate assembly 205, a drive motor 202, a planetary reducer 203, a glue melting cylinder 201, and a glue melting screw 206, as shown below. Figure 1-3 As shown, the bottom surface of the injection head plate assembly 204 is slidably connected to the guide slide rail seat 208, and the bottom surface of the injection second plate assembly 205 is slidably connected to the guide slide rail seat 208. The injection second plate assembly 205 is located behind the injection head plate assembly 204. The melt cylinder 201 extends forward of the injection head plate assembly 204, with its inlet end facing the injection second plate. One end of the melt screw 206 is embedded in the melt cylinder 201, located in the melt... A storage space is formed between the end of the melting screw 206 inside the cylinder 201 and the interior of the melting cylinder 201; the drive motor 202 and the planetary reducer 203 are connected. The planetary reducer 203 is located behind the injection plate assembly 205, and the planetary reducer 203 is connected to the other end of the melting screw 206 through a transmission shaft. The drive motor 202 drives the melting screw 206 to rotate to achieve feeding. During the feeding process, the plastic particles are melted and transported to the storage space, waiting for injection.

[0048] The injection head plate assembly 204 includes two sets of parallel injection cylinders 207, which are located on both sides of the molten plastic cylinder 201. The piston rods of the two injection cylinders 207 are connected to the injection second plate assembly 205. The injection cylinders 207 perform the injection function, guiding the injection second plate assembly 205 to move towards the injection head plate assembly 204, compressing the storage space, and injecting the molten plastic in the storage space to achieve injection.

[0049] Drive unit 3 includes a servo oil pump and a hydraulic drive assembly, such as Figure 1 and 2As shown in the figure, reference numeral 3 refers to the servo oil pump part of the drive device 3. The hydraulic drive assembly is located below the injection head plate assembly 204. Specifically, the hydraulic drive assembly includes a drive hydraulic cylinder and a fixing component. The drive hydraulic cylinder is located below the injection head plate assembly 204 and is fixedly installed in the guide groove 209 of the guide slide seat 208. The fixing component is provided on the bottom surface of the injection head plate assembly 204. The piston rod end of the drive hydraulic cylinder is connected to the fixing component. The drive hydraulic cylinder is connected to the servo oil pump through a pipeline. The servo oil pump controls the piston rod of the drive hydraulic cylinder to extend or retract. The injection cylinder 207 is connected to the servo oil pump through a pipeline. The servo oil pump controls the injection.

[0050] The drive motor 202 and the servo oil pump are respectively connected to the control device 4.

[0051] The control device 4 is a conventional control cabinet, such as one containing servo drivers, AC contactors, etc., which controls the drive motor 202 and the servo oil pump.

[0052] It is easy to understand that the movement of the injection head plate assembly 204 on the guide slide seat 208 is controlled by a hydraulic drive assembly, so as to... Figure 1 Taking a perspective example, when the piston rod of the driving hydraulic cylinder extends, it pushes the injection head plate assembly 204 to the left (i.e., backward). When the piston rod retracts, it pulls the injection head plate assembly 204 to the right (i.e., forward). Since the injection second plate assembly 205 is connected to the injection head plate assembly 204 via the injection cylinder 207, the injection second plate assembly 205 will move along with the injection head plate assembly 204. Furthermore, when the injection cylinder 207 is activated, the injection second plate assembly 205 will move closer to or further away from the injection head plate assembly 204 accordingly.

[0053] In this invention, the injection device 2 is directly controlled by the drive motor 202 to melt and inject the glue, eliminating the need for the oil pump and oil circuit structure of existing injection devices 2. This increases the efficiency of the melting screw 206 to over 90.25%. The high transmission efficiency effectively reduces the energy consumption of the electromolding structure of the injection molding machine, achieving the goal of energy saving and efficiency improvement. Furthermore, in this invention, the drive motor 202 and the servo oil pump are controlled by the control device 4, improving control precision. The feeding and injection actions of the injection device 2 can be better coordinated, improving work efficiency, and saving a servo driver, which helps to reduce costs.

[0054] The working process of this invention is as follows:

[0055] Before the melting stage, the injection head plate assembly 204 and the injection second plate assembly 205 are moved forward as a whole into place, the nozzle of the melting cylinder 201 is aligned with the injection port of the mold, and the position of the injection head plate assembly 204 is locked.

[0056] A feed inlet is provided at the injection head plate assembly 204, leading to the interior of the melting cylinder 201. During the melting stage, plastic granules enter the melting cylinder 201 through the feed inlet of the injection head plate assembly 204, and are located between the melting cylinder 201 and the melting screw 206. Then, the drive motor 202 drives the melting screw 206 to rotate, thereby feeding forward. The plastic granules melt due to friction and heating during the conveying process, and the molten plastic finally enters the storage space for temporary storage.

[0057] During the injection stage, the two sets of injection cylinders 207 of the injection head plate assembly 204 are activated, causing the injection second plate assembly 205 to move towards the injection head plate assembly 204, compressing the storage space. The melting screw 206 injects the molten plastic into the mold, and then holds the pressure.

[0058] After the pressure holding is completed, the two-plate assembly 205 is retracted and stored, waiting for the next injection. The mold is opened and the formed product is taken out. The above steps are repeated to complete the melting and injection.

[0059] After the product production is completed, the injection head plate assembly 204 and the injection second plate assembly 205 retract and leave the mold.

[0060] It is easy to understand that in this invention, the connection between the molten glue screw 206 and the molten glue cylinder 201 is the same as that of existing injection equipment. The rotation of the molten glue screw 206 in the molten glue cylinder 201 can realize feeding. A check ring is provided at the front end of the molten glue screw 206. Its working structure and working principle are the same as those of existing injection structures. Unless otherwise specified, other parts of this invention are the same as those of existing injection equipment.

[0061] Example 2

[0062] Based on Embodiment 1, furthermore, to confirm whether the movement of the injection head plate assembly 204 and the injection second plate assembly 205 is in place, the electrofusion structure of the injection molding machine of the present invention also includes a positioning device. The positioning device includes a first detection plate 210, a second detection plate 212, and a plurality of first proximity switches 211 and second proximity switches 213, such as... Figure 4As shown, positioning slots 216 are respectively provided on the two outer sides of the guide slide seat 208 along the length direction. Multiple first detection plates 210 are arranged sequentially back and forth in one of the positioning slots 216 along the length direction of the guide slide seat 208. Multiple second detection plates 212 are arranged sequentially back and forth in another positioning slot 216 along the length direction of the guide slide seat 208. The side of the injection head plate assembly 204 on the same side as the first detection plate 210 extends outward to provide a first fixing plate 214. The first proximity switch 211 is located below the first fixing plate 214 and faces the positioning slot 216 on the same side. The side of the injection second plate assembly 205 on the same side as the second detection plate 212 extends outward to provide a second fixing plate 215. The second proximity switch 213 is located below the second fixing plate 215 and faces the positioning slot 216 on the same side.

[0063] Furthermore, the number of first detection plates 210 is greater than or equal to two. When there are two first detection plates 210, they correspond to the forward limit position and the backward limit position of the injection head plate assembly 204, respectively. That is, the two first detection plates 210 are arranged one in front of the other in the positioning through groove 216. When the injection head plate assembly 204 moves forward to the limit position, the nozzle of the melt cylinder 201 is connected to the injection port of the mold. When the injection head plate assembly 204 moves backward, the melt cylinder 201 leaves the mold. When the first proximity switch 211 detects the presence of the first detection plate 210, it indicates that the injection head plate assembly 204 has moved to the corresponding position.

[0064] Similarly, the number of second detection plates 212 is greater than or equal to two. When there are two second detection plates 212, they correspond to the melting stage position and the final position of the injection stage of the two-plate assembly 205, respectively. That is, the two second detection plates 212 are set one after the other in the positioning slot 216 on the other side. In the melting stage, the position of the injection two-plate assembly 205 is the same for the starting position and the material storage reset position. The material is fed and melted by the rotation of the melting screw 206. In the injection stage, the injection two-plate assembly 205 needs to move towards the injection head plate assembly 204. When the second proximity switch 213 detects the presence of the second detection plate 212, it indicates that the injection two-plate assembly 205 has moved to the corresponding position.

[0065] It is easy to understand that when the number of first detection plates 210 is greater than two, more movement points of the injection head plate assembly 204 can be monitored. When the number of second detection plates 212 is greater than two, more movement points of the injection second plate assembly 205 can be monitored.

[0066] Specifically, in this embodiment, the control method of the present invention is as follows:

[0067] S1. Before the melting stage, the injection head plate assembly 204 and the injection second plate assembly 205 move forward as a whole. When the first proximity switch 211 detects the first detection plate 210 at the forward limit position and the second proximity switch 213 detects the second detection plate 212 at the melting position, it indicates that the injection head plate assembly 204 and the injection second plate assembly 205 have moved forward to their positions, locking the position of the injection head plate assembly 204. At this time, the position of the injection second plate assembly 205 is the melting position.

[0068] S2. In the melting stage, plastic granules enter the melting cylinder 201 through the feed port of the injection head plate assembly 204 and are located between the melting cylinder 201 and the melting screw 206. Then, the drive motor 202 drives the melting screw 206 to rotate, realizing forward feeding. The plastic granules are melted by friction and heating during the conveying process. Finally, the molten plastic enters the storage space for temporary storage.

[0069] S3. During the injection stage, the injection cylinder 207 of the injection head plate assembly 204 is activated, causing the injection second plate assembly 205 to move towards the injection head plate assembly 204. The molten plastic screw 206 injects the molten plastic into the mold. When the second proximity switch 213 moves forward with the injection second plate assembly 205 and detects the presence of the second detection plate 212 at the injection position, it indicates that the injection second plate assembly 205 has moved to the injection position and injection is achieved. Only then does the pressure holding stage begin.

[0070] S4. During the pressure holding stage, the second proximity switch 213 always detects that the injection plate assembly 205 is in the injection position.

[0071] S5. After the pressure holding stage is completed, the second injection plate assembly 205 retracts. When the second proximity switch 213 detects the second detection plate 212 at the melt position again, it indicates that the second injection plate assembly 205 has returned to the melt position. Repeat steps S2-S4 to complete the melting and injection.

[0072] S6. After the injection head plate assembly 204 and the injection second plate assembly 205 are completed, they retract and leave the mold. When the first proximity switch 211 detects the first detection plate 210 at the retraction limit position, it indicates that the injection head plate assembly 204 and the injection second plate assembly 205 have retracted into place and are ready for the next injection production.

[0073] The first proximity switch 211 and the second proximity switch 213 are used to detect whether the injection head plate assembly 204 and the injection second plate assembly 205 have moved into position as set. If the injection head plate assembly 204 cannot move forward to the position, there is a risk of injection failure. If the injection second plate assembly 205 fails to move accurately between the molten position and the injection position, it will also have a great impact on injection molding. This embodiment effectively solves the problem of position detection.

[0074] Example 3

[0075] In existing technologies, it is generally not advisable to use external detection equipment to simultaneously monitor the injection head plate assembly 204 and the injection second plate assembly 205. This is because when producing products of different models or sizes, the injection volume varies, and the mold injection port design may differ. In other words, the injection position and melt position of the injection second plate assembly 205 are variable, and the forward limit position of the injection head plate assembly 204 may also change. If detection equipment is installed, the detection position needs to be manually readjusted every time the product model is changed, which is inconvenient. Based on this, this embodiment further improves upon Embodiment 2 as follows:

[0076] The first detection plate 210 and the second detection plate 212 are detachably connected to the guide slide rail seat 208. The sides of the two positioning through slots 216 are provided with scale lines along the length direction, and the starting point of the scale lines faces the direction of the mold.

[0077] When changing product models or sizes, the first detection plate 210 and / or the second detection plate 212 can be adjusted along the scale lines. The positions of the injection head plate assembly 204 and the injection second plate assembly 205 in the injection molding process can be obtained according to the injection parameters. The scale lines can be used to achieve rapid positioning.

[0078] In this embodiment, the connection between the first detection plate 210 or the second detection plate 212 and the guide slide rail seat 208 can be varied, as long as the position of the first detection plate 210 and the second detection plate 212 within their positioning through groove 216 can be adjusted.

[0079] The present invention also provides one feasible structure, for example, where strong magnets are respectively provided at the top of the first detection plate 210 and the top of the second detection plate 212, the guide slide seat 208 is made of ferrous material, and the first detection plate 210 and the second detection plate 212 are fixed in the corresponding positioning slots 216 by magnetic attraction. It is easy to understand that other feasible connection methods can also be applied to the present invention.

[0080] Example 4

[0081] Unlike Embodiment 3, this embodiment further improves Embodiment 2 to achieve automated adjustment of the positions of the first detection board 210 and the second detection board 212, as follows:

[0082] There are two first detection boards 210 and two second detection boards 212.

[0083] The positioning device also includes a first adjusting motor assembly, a first lead screw assembly, a second adjusting motor assembly, and a second lead screw assembly, such as... Figure 5As shown, the first adjusting motor assembly and the first lead screw assembly are on the same side as the first detection plate 210. The first lead screw assembly includes a first lead screw member 217 and two first bearing seats 218. The first lead screw member 217 is disposed between the two first bearing seats 218. The two first bearing seats 218 are fixedly disposed in the positioning through groove 216. The two first lead screw assemblies are connected end to end. The top of the first detection plate 210 is provided with a first nut guide member 220. The first detection plate 210 is connected to the first lead screw member 217 through the first nut guide member 220. The two first detection plates 210 are respectively disposed in the two first lead screw assemblies. The first adjusting motor assembly includes two first motors 219. The two first motors 219 are respectively disposed at the outer ends of the two first lead screw assemblies. The drive shaft of the first motor 219 is connected to the end of the first lead screw member 217, driving the first lead screw member 217 to rotate, thereby adjusting the position of the first detection plate 210 in the positioning through groove 216 on the same side.

[0084] The two first detection plates 210 correspond to the forward limit position and the backward limit position of the injection head plate assembly 204, respectively. When changing products for production, the forward limit position of the injection head plate assembly 204 may change. At this time, the first motor 219 controls the first detection plate 210 corresponding to the forward limit position to move to the new forward limit position, and then the first motor 219 locks the position of the first detection plate 210. Similarly, the position adjustment of the first detection plate 210 corresponding to the backward limit position can also be achieved.

[0085] Furthermore, when changing product types, during the debugging phase, the first detection plate 210 corresponding to the forward limit position moves to the limit position in the direction of another first detection plate 210, and the first detection plate 210 corresponding to the backward limit position moves to the limit position in the direction of another first detection plate 210, at which time the two first detection plates 210 approach each other.

[0086] During the forward adjustment of the injection head plate assembly 204, the first detection plate 210 corresponding to the forward limit position always follows the movement of the injection head plate assembly 204 through the detection of the first proximity switch 211 until a new forward limit position is determined. Then the position of the first detection plate 210 corresponding to the forward limit position is locked. Similarly, during the backward adjustment of the injection head plate assembly 204, the first detection plate 210 corresponding to the backward limit position always follows the movement of the injection head plate assembly 204 through the detection of the first proximity switch 211 until a new backward limit position is determined. Then the position of the first detection plate 210 corresponding to the backward limit position is locked.

[0087] Alternatively, the adjustment position can be automatically determined by the mold parameters of different product models. For example, the distance from the injection head plate assembly 204 to the injection port of the original product is known. The distance between the protruding or recessed end of the injection port of the new product and the injection port of the original product is the distance that the first detection plate 210 needs to move forward or backward corresponding to the forward limit position. The value of this distance can be obtained according to the mold parameters. Taking the side of the mold facing the injection head plate assembly 204 as the reference plane, the distance between the injection port and the reference plane is known. Based on the difference between the distance between the injection port and the reference plane of the new and old products, the distance that the first detection plate 210 needs to move forward or backward corresponding to the forward limit position can be obtained.

[0088] In addition, the position adjustment of the first detection plate 210 corresponding to the backward limit position can also be determined according to the distance between the first detection plate 210 and the mold mechanism, or it can be adjusted accordingly according to the distance between the two first detection plates 210. For example, if the distance between the two first detection plates 210 is set to be fixed, when the position of the first detection plate 210 corresponding to the forward limit position is adjusted, the position of the first detection plate 210 corresponding to the backward limit position is adjusted accordingly, keeping the distance between the two first detection plates 210 unchanged.

[0089] The structure and connection method of the second adjusting motor group and the second lead screw assembly are similar to those of the first adjusting motor group and the first lead screw assembly. The second adjusting motor group and the second lead screw assembly are on the same side as the second detection plate 212. The second lead screw assembly includes a second lead screw and two bearing seats. The second lead screw is disposed between the two bearing seats, and the two bearing seats are fixedly disposed in the positioning through groove 216. The two second lead screw assemblies are connected end to end. A second nut guide is provided at the top of the second detection plate 212. The second detection plate 212 is connected to the second lead screw through the second nut guide. The two second detection plates 212 are respectively disposed in the two second lead screw assemblies. The second adjusting motor group includes two second motors. The two second motors are respectively disposed at the outer ends of the two second lead screw assemblies. The drive shaft of the second motor is connected to the end of the second lead screw, driving the second lead screw to rotate, thereby adjusting the position of the second detection plate 212 in the positioning through groove 216 on the same side.

[0090] Similar to the adjustment method of the first detection plate 210, when changing the product type, during the debugging stage, the second detection plate 212 corresponding to the injection position moves to the limit position in the direction of another second detection plate 212, and the second detection plate 212 corresponding to the melting position moves to the limit position in the direction of another second detection plate 212. At this time, the two second detection plates 212 move closer to each other.

[0091] During the forward adjustment of the two-plate injection assembly 205, the second detection plate 212 corresponding to the injection position is always moved with the two-plate injection assembly 205 by the detection of the second proximity switch 213 until a new injection position is determined. Then the position of the second detection plate 212 corresponding to the injection position is locked. Similarly, during the backward adjustment of the two-plate injection assembly 205, the second detection plate 212 corresponding to the melting position is always moved with the two-plate injection assembly 205 by the detection of the second proximity switch 213 until a new melting position is determined. Then the position of the second detection plate 212 corresponding to the melting position is locked.

[0092] It is easy to understand that, in order to facilitate the guidance of the first nut guide 220 and the second nut guide, a guide groove can be provided along the length direction in the positioning through groove 216 on the same side. The end of the first nut guide 220 facing the positioning through groove 216 on the same side is embedded in the guide groove, and the end of the second nut guide facing the positioning through groove 216 on the same side is embedded in the guide groove. When the nut guide is acted upon by the lead screw, the nut guide can move along the guide groove.

[0093] The embodiments provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention, and the descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An electrofusion structure for an injection molding machine, characterized in that, Includes a frame (1) and a control device (4), a glue injection device (2) and a drive device (3) mounted on the frame (1); The frame (1) is provided with a guide slide rail seat (208), the guide slide rail seat (208) is provided with a guide through groove (209) along the length direction, and parallel slide rails are provided on both sides of the guide through groove (209); The glue injection device (2) includes a glue injection head plate assembly (204), a glue injection second plate assembly (205), a drive motor (202), a planetary reducer (203), a glue melting cylinder (201), and a glue melting screw (206). The glue injection head plate assembly (204) and the glue injection second plate assembly (205) are slidably connected to a slide rail. The glue injection second plate assembly (205) is located behind the glue injection head plate assembly (204). The glue melting cylinder (201) extends through the glue injection head plate assembly (204) and forward. The inlet end faces the glue injection two-plate assembly. One end of the glue-melting screw (206) is embedded in the glue-melting cylinder (201). The drive motor (202) and the planetary reducer (203) are connected. The planetary reducer (203) is located behind the glue injection two-plate assembly (205) and is connected to the other end of the glue-melting screw (206) through a transmission shaft. The glue injection head plate assembly (204) includes a glue injection cylinder (207). The glue injection cylinder (207) is located outside the glue-melting cylinder (201). The piston rod of the glue injection cylinder (207) is connected to the glue injection two-plate assembly (205). The drive device (3) includes a servo oil pump and a hydraulic drive assembly. The hydraulic drive assembly is located below the injection head plate assembly (204). The hydraulic drive assembly is connected to the servo oil pump through a pipeline. The control device (4) is connected to the drive motor (202) and the servo oil pump respectively; The electrofusion structure of the injection molding machine also includes a positioning device, which includes a first detection plate (210), a second detection plate (212), and a plurality of first proximity switches (211) and second proximity switches (213); The two outer sides of the guide slide rail seat (208) are respectively provided with positioning through grooves (216) along the length direction. A plurality of first detection plates (210) are arranged sequentially back and forth in one of the positioning through grooves (216) along the length direction of the guide slide rail seat (208). A plurality of second detection plates (212) are arranged sequentially back and forth in another positioning through groove (216) along the length direction of the guide slide rail seat (208). The first fixing plate (214) extends outward from the side of the injection head plate assembly (204) on the same side as the first detection plate (210). The first proximity switch (211) is located below the first fixing plate (214) and faces the positioning through groove (216) on the same side. The second fixing plate assembly (205) extends outward from the side of the second detection plate (212) on the same side. The second proximity switch (213) is located below the second fixing plate (215) and faces the positioning through groove (216) on the same side. There are two first detection plates (210), one of which corresponds to the forward limit position of the injection head plate assembly (204), and the other first detection plate (210) corresponds to the backward limit position of the injection head plate assembly (204). There are two second detection plates (212), one of which corresponds to the melting position of the two-plate injection assembly (205), and the other corresponds to the injection position of the two-plate injection assembly (205). The positioning device further includes a first adjusting motor assembly, a first lead screw assembly, a second adjusting motor assembly, and a second lead screw assembly; The first adjusting motor group and the first lead screw assembly are on the same side as the first detection plate (210), and the two first lead screw assemblies are connected end to end. The first adjusting motor group includes two first motors (219), and the two first motors (219) are respectively connected to the outer ends of the two first lead screw assemblies. The top of the first detection plate (210) is provided with a first nut guide (220), and the two first detection plates (210) are respectively connected to the two first lead screw assemblies through the first nut guide (220). The second adjusting motor group and the second lead screw assembly are on the same side as the second detection plate (212). The two second lead screw assemblies are connected end to end. The second adjusting motor group includes two second motors. The two second motors are respectively connected to the outer ends of the two second lead screw assemblies. The top of the second detection plate (212) is provided with a second nut guide. The two second detection plates (212) are respectively connected to the two second lead screw assemblies through the second nut guide.

2. The electrosintering structure for injection molding machines according to claim 1, characterized in that, The hydraulic drive assembly includes a drive hydraulic cylinder and a fixing component. The drive hydraulic cylinder is located below the injection head plate assembly (204) and is fixedly installed in the guide slot (209) of the guide slide rail seat (208). The fixing component is provided on the bottom surface of the injection head plate assembly (204). The piston rod end of the drive hydraulic cylinder is connected to the fixing component. The drive hydraulic cylinder is connected to the servo oil pump through a pipeline. The servo oil pump controls the piston rod of the drive hydraulic cylinder to extend or retract. The injection cylinder (207) is connected to the servo oil pump through a pipeline.

3. The electrosintering structure for injection molding machines according to claim 1 or 2, characterized in that, Both the first detection plate (210) and the second detection plate (212) are detachably connected to the guide slide rail seat (208).

4. The electrosintering structure for injection molding machines according to claim 3, characterized in that, The two positioning slots (216) have scale lines on their sides along the length direction, with the starting point of the scale lines close to the mold.

5. A method for controlling the electrosintering structure of an injection molding machine, characterized in that, The electrosintering structure for injection molding machines as described in any one of claims 1-4 is as follows: S1. Before the melting stage, the injection head plate assembly (204) and the injection second plate assembly (205) move forward as a whole. When the first proximity switch (211) detects the first detection plate (210) at the forward limit position and the second proximity switch (213) detects the second detection plate (212) at the melting position, it indicates that the injection head plate assembly (204) and the injection second plate assembly (205) have moved forward to their positions and the position of the injection head plate assembly (204) is locked. At this time, the position of the injection second plate assembly (205) is the melting position. S2. In the melting stage, plastic particles enter the melting cylinder (201) through the feed port of the injection head plate assembly (204), and are located between the melting cylinder (201) and the melting screw (206). Then, the drive motor (202) drives the melting screw (206) to rotate, thereby realizing forward feeding. The plastic particles are melted by friction and heating during the conveying process, and the molten plastic enters the storage space for temporary storage. S3. During the injection stage, the injection cylinder (207) of the injection head plate assembly (204) is activated, causing the injection second plate assembly (205) to move towards the injection head plate assembly (204). The molten plastic screw (206) injects the molten plastic into the mold. When the second proximity switch (213) moves forward with the injection second plate assembly (205) and detects the presence of the second detection plate (212) at the injection position, it indicates that the injection second plate assembly (205) has moved to the injection position and injection is achieved. Then, the pressure holding stage is entered. S4. During the pressure holding stage, the second proximity switch (213) always detects that the two-plate injection assembly (205) is in the injection position; S5. After the pressure holding stage is completed, the two-plate injection assembly (205) moves backward. When the second proximity switch (213) detects the second detection plate (212) at the melt position again, it indicates that the two-plate injection assembly (205) has returned to the melt position. Repeat steps S2-S4 to complete the melting and injection. S6. After the production of the injection product is completed, the injection head plate assembly (204) and the injection second plate assembly (205) retract and leave the mold. When the first proximity switch (211) detects the first detection plate (210) at the retraction limit position, it indicates that the injection head plate assembly (204) and the injection second plate assembly (205) have retracted into place and are ready for the next injection production.

6. A method for controlling the electrosintering structure of an injection molding machine, characterized in that, The following applies to the electrosintering structure of the injection molding machine as described in claim 1: When changing product types, before the debugging phase, the two first detection boards (210) are brought close to each other, and the two second detection boards (212) are brought close to each other; During the debugging phase, during the forward adjustment of the injection head plate assembly (204), the first detection plate (210) corresponding to the forward limit position is detected by the first proximity switch (211) and always follows the movement of the injection head plate assembly (204) until a new forward limit position is determined. Then the position of the first detection plate (210) corresponding to the forward limit position is locked. During the backward adjustment of the injection head plate assembly (204), the first detection plate (210) corresponding to the backward limit position is detected by the first proximity switch (211) and always follows the movement of the injection head plate assembly (204) until a new backward limit position is determined. Then the position of the first detection plate (210) corresponding to the backward limit position is locked. During the forward adjustment of the two-plate injection assembly (205), the second detection plate (212) corresponding to the injection position is detected by the second proximity switch (213). The second detection plate (212) always follows the movement of the two-plate injection assembly (205) until the new injection position is determined. Then the position of the second detection plate (212) corresponding to the injection position is locked. During the backward adjustment of the two-plate injection assembly (205), the second detection plate (212) corresponding to the melt position is detected by the second proximity switch (213) and always follows the movement of the two-plate injection assembly (205) until a new melt position is determined. Then the position of the second detection plate (212) corresponding to the melt position is locked.

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