Drawbar device, injection molding machine and control method, computer and readable storage medium

Abstract

The present application belongs to the technical field of injection molding process, and particularly relates to a pull rod device, an injection molding machine, a control method, a computer and a readable storage medium. The present application aims to solve the problem of the existing pull rod extraction structure of the injection molding machine, which needs to additionally add a support frame, has low space utilization, and has high manufacturing and maintenance costs. The pull rod device comprises: a base assembly comprising a base beam and a connecting seat, one end of the base beam being connected with a fixed mold plate, and the base beam and the connecting seat being slidingly connected; a driving assembly comprising an oil cylinder, the side surface of the oil cylinder being connected with the connecting seat, and the output shaft of the oil cylinder being connected with a pull rod; the oil cylinder is controlled to be driven and slides with the connecting seat, thereby driving the pull rod to move along its guide direction, freeing up the top space of the fixed mold plate, improving the space utilization, and reducing the manufacturing cost of the existing support frame. At the same time, the pull rod device does not need to be manually aligned, thereby reducing the step of manually aligning the existing support structure with the pull rod, and improving the mold putting / taking efficiency.

Description

Technical Field

[0001] The invention belongs to the field of injection molding technology, specifically relating to a rod-pulling device, an injection molding machine and control method, a computer and a readable storage medium. Background Technology

[0002] In the mold clamping unit of an injection molding machine, four tie rods (also called tie bars) are typically installed. Their main function is to ensure that the two mold plates are firmly fixed in place when the mold clamping unit is under high pressure. In actual operation, for molds with a gap smaller than the tie rods, the crane can easily place the mold in. However, for molds with a gap larger than the tie rods, the tie rods often become obstacles when placing the mold into the center area of ​​the mold plate. Operators usually configure one of the tie rods that fixes the mold to be retractable for easy mold placement / removal.

[0003] The existing pull rod structure involves making a pull rod at the top of the mold into a pull rod that can be pulled out in conjunction with the mold plate, and then adding a support frame on the outside of the mold plate structure to fix the pulled-out pull rod. However, the support frame structure often occupies the space at the top of the mold plate. In actual production, the space at the top of the mold plate is very limited, often requiring the installation of automated equipment such as robotic arms, which also occupies a lot of space. This significantly reduces the overall space utilization of the injection molding machine and is extremely inconvenient for factory production. Moreover, the large outward extension structure of the support frame is very expensive, increasing production costs and making it uneconomical. At the same time, because the support frame is an outward extension structure and requires ground support, the alignment of the entire structure and the pull rod axis must be very high, otherwise it is easy to jam. Therefore, operators need to frequently calibrate it, which significantly increases the input of manpower and resources, as well as time and economic costs.

[0004] Therefore, the present invention provides an injection molding machine rod puller that does not require a support frame, in order to solve the above-mentioned problems. Summary of the Invention

[0005] One objective of this invention is to solve the problem that existing pull rod extraction structures require additional support frames, which reduces the overall space utilization rate and requires a large amount of manpower and material resources for maintenance, increasing manufacturing and maintenance costs.

[0006] To achieve the above objectives, the present invention provides a rod-pulling device for an injection molding machine, the injection molding machine including a fixed platen and a pull rod penetrating the fixed platen; the rod-pulling device includes:

[0007] A base assembly includes a base beam and a connecting seat, one end of the base beam being connected to the fixed template, and the base beam being slidably connected to the connecting seat;

[0008] A drive assembly includes a hydraulic cylinder, the side of which is connected to the connecting seat, and the output shaft of which is connected to the pull rod; the hydraulic cylinder is controlled to be driven and slides with the connecting seat, thereby driving the pull rod to move along its guide direction.

[0009] Furthermore, the base assembly also includes a guide rail, which extends outward from the side edge of the base beam, and the guiding direction of the guide rail is the same as the guiding direction of the tie rod; the contact surfaces of the guide rail and the connecting seat are both smoothly arranged, and the edge of the connecting seat can abut against the base beam.

[0010] Furthermore, the rod-pulling device also includes: a piston assembly comprising a cylinder and a piston rod, the cylinder being fixedly mounted on the base beam on the side near the fixed template, a first end of the piston rod being embedded in the cylinder, and a second end of the piston rod extending away from the fixed template; and a transition bracket, one end of which is connected to the connecting seat, and the other end of which is connected to the second end of the piston rod, to limit the maximum movable displacement of the connecting seat.

[0011] Furthermore, the drive assembly also includes a hydraulic press, which is connected to the cylinder via a first pipeline to apply / remove pressure to the cylinder.

[0012] Furthermore, the rod-pulling device also includes a locking element, which is disposed on the fixed template or on the base beam; the hydraulic cylinder is provided with a slot in the axial direction near the fixed template, and the locking element can cooperate with the slot to lock the hydraulic cylinder and the fixed template or the base beam.

[0013] Furthermore, the locking element includes a lock body and a latch. The lock body is disposed on the fixed template or on the base beam. The latch is disposed on the lock body and is configured to be controllably extended or retracted. The hydraulic press is connected to the lock body through a second pipeline and is used to drive the latch.

[0014] Furthermore, the connecting surfaces of the pull rod and the fixed template are both smooth surfaces in the circumferential direction; or, the connecting surfaces of the pull rod and the fixed template are both threaded structures in the circumferential direction.

[0015] Furthermore, the base beam is configured as an "H"-shaped steel structure; and / or, the base beam is configured as a three-section frame beam, including a first section, a second section, and a third section connected in sequence, the first section being connected to the fixed template, and the weight and width of the first section, the second section, and the third section decreasing in sequence.

[0016] Furthermore, the rod-pulling device also includes a first position detection module, which includes a first position sensor and a second position sensor. The first position sensor is disposed on the first section of the base beam and is used to detect whether the connecting seat is in a first position abutting against the base beam. The second position sensor is disposed on the end of the third section of the base beam and is used to detect whether the connecting seat is in a second position away from the base beam by the maximum moving distance. A control module is also included, with the first position detection module and the hydraulic press electrically connected to the control module to control the operating state of the hydraulic press based on the detection information from the first position detection module.

[0017] In other embodiments, an injection molding machine is provided, including a film-forming frame consisting of a tie rod and a fixed template, a mold, and a rod-pulling device for the injection molding machine as described above.

[0018] Furthermore, the injection molding machine also includes: a camera module, which is used to detect whether the mold exists in the working area and to obtain the state of the mold; a second position detection module, which is used to detect whether the mold is placed in a designated position; and a control system, wherein the camera module, the second position detection module, and the control module are electrically connected to the control system, and the control system is capable of controlling each module to perform operations.

[0019] In some embodiments, a control method for an injection molding machine is provided, applicable to any of the injection molding machines described above; the control method includes: responding to receiving a command to open the pull rod; controlling the hydraulic press to depressurize the lock body through a second pipeline, causing the locking tongue of the locking member to retract; controlling the hydraulic press to pressurize the cylinder through a first pipeline; obtaining the position of the connecting seat; determining whether the position of the connecting seat has reached a second position; if so, controlling the hydraulic press to stop running, and the pull rod to be in the open state.

[0020] Furthermore, the step of responding to receiving an instruction to open the lever includes: acquiring image information of the working area; determining, based on the acquired image information, whether a mold exists within the working area; if so, determining, based on the acquired image information, whether the mold is outside the film-forming frame; if so, issuing an instruction to open the lever.

[0021] Furthermore, in response to the lever being in the open state, it is determined whether the mold has been placed in the designated position; if so, the mold placement is complete.

[0022] Furthermore, the step of determining whether the mold is placed in the designated position further includes: obtaining the position information of the mold; determining whether the position of the mold has reached the designated position; if so, obtaining the current image information of the mold; comparing the obtained image information with a preset image; if the comparison value between the image information and the preset image reaches a preset threshold, the mold placement is completed.

[0023] Furthermore, the control method also includes: responding to the completion of mold placement; controlling the hydraulic press to depressurize the cylinder through the first pipeline, so that the pull rod returns to the initial position fixed with the fixed template; obtaining the position of the connecting seat; determining whether the connecting seat has reached the first position; if so, controlling the hydraulic press to stop depressurizing the first pipeline, and simultaneously controlling the hydraulic press to apply pressure to the locking body of the locking member through the second pipeline, so that the locking tongue of the locking member extends to engage the locking tongue with the groove of the cylinder.

[0024] In other embodiments, a computer is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the control method for an injection molding machine as described above; and is applied to the injection molding machine described above.

[0025] In other embodiments, a computer-readable storage medium is provided, the computer-readable storage medium storing a computer program, characterized in that, when the computer program is executed by a processor, it implements the control method of the injection molding machine as described above and is applied to the injection molding machine described above.

[0026] Based on the foregoing description, those skilled in the art will understand that in the aforementioned technical solution of the present invention, by adding a rod-pulling device to the tie rod of the injection molding machine film-forming frame and using the rod-pulling device to drive the tie rod to move, compared with the prior art, the top space of the fixed template is freed up, which is beneficial to the installation layout of other equipment, enhances the integration of equipment, saves workshop space and site, and thus increases the unit output value.

[0027] Furthermore, the base beam is designed as a three-section frame beam with different weights and structures. With a unique mechanical structure distribution design, the weight of the base beam is controlled within a reasonable range, and it can meet the working conditions without additional support, thus achieving a double saving of materials and space.

[0028] Furthermore, since the base beam is rigidly connected only to the fixed template, which serves as the reference for the injection molding machine, the entire connection is highly stable and unaffected by external factors. The addition of guide rails further reduces the contact area between the base beam and the connecting seat, making the entire device operate more smoothly and reliably.

[0029] Furthermore, the present invention includes a position detection module, a camera module, and a control module, enabling the injection molding machine to complete the entire process of pulling out the tie rod before mold placement and restoring the tie rod to its initial state after mold placement, thereby improving the automation level of the equipment and greatly increasing the efficiency of the mold placement process. Attached Figure Description

[0030] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0031] Figure 1 This is a schematic diagram of the film-forming frame of the injection molding machine in some embodiments of the present invention;

[0032] Figure 2 for Figure 1 A schematic diagram of the structure that drives the pull rod to extend using the pull rod device;

[0033] Figure 3 for Figure 1 A schematic diagram of the structure in which the pull rod device drives the tie rod back to its initial position;

[0034] Figure 4 for Figure 1 Structural schematic diagram of the central base beam and transition support;

[0035] Figure 5 for Figure 1 Exploded view of the structure of the central base beam;

[0036] Figure 6 for Figure 1 A schematic diagram showing the connections of the modules within the pull rod device;

[0037] Figure 7 This is a schematic diagram showing the connection of various modules within the injection molding machine in other embodiments of the present invention;

[0038] Figure 8 This is a flowchart of an injection molding machine control method in some embodiments of the present invention. Attached image description:

[0040] 100. Pull rod device; 120. Base assembly; 121. Base beam; 1211. First section; 1212. Second section; 1213. Third section; 1214. First base plate; 1215. Second base plate; 1216. Support plate; 122. Connecting seat; 123. Guide rail; 130. Drive assembly; 131. Hydraulic cylinder; 140. Piston assembly; 141. Cylinder; 142. Piston rod; M. First end of screw rod; N. Second end of piston rod; 143. Support structure; 150. Transition support; 160. Locking element; 171. First position sensor; 172. Second position sensor; 180. Control module;

[0041] 200. Injection molding machine; 210. Fixed template; 220. Tie rod; 230. Control system; 240. Camera module; 250. Second position detection module; 260. Image processing module. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0043] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] Those skilled in the art should understand that the embodiments described below are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. These partial embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0046] The following reference Figures 1 to 8 This document will provide a detailed description of the rod-pulling device, injection molding machine, and control method of the injection molding machine in some embodiments of the present invention. Figure 1 This is a schematic diagram of the film-forming frame of the injection molding machine in some embodiments of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure that drives the pull rod to extend using the pull rod device;

[0047] Figure 3 for Figure 1 A schematic diagram of the structure in which the pull rod device drives the tie rod back to its initial position; Figure 4 for Figure 1 Structural schematic diagram of the central base beam and transition support; Figure 5 for Figure 1 Exploded view of the structure of the central base beam; Figure 6 for Figure 1 A schematic diagram showing the connections of the modules within the pull rod device; Figure 7 This is a schematic diagram showing the connection of various modules within the injection molding machine in other embodiments of the present invention; Figure 8 This is a flowchart of an injection molding machine control method in some embodiments of the present invention.

[0048] like Figure 1 As shown, in some embodiments of the present invention, a rod-pulling device 100 for an injection molding machine 200 is provided. The injection molding machine 200 includes a fixed template 210 and a pull rod 220 passing through the fixed template 210. The rod-pulling device 100 is fixedly installed on one side of the fixed template 210 and connected to the pull rod 220. The fixed template 210 is provided with a through hole, and one end of the pull rod 220 passes through the through hole. The rod-pulling device 100 is used to control the pull rod 220 to be smoothly pulled out or pushed in along its own guide direction.

[0049] The connecting surfaces of the tie rod 220 and the fixed template 210 are both smoothly circumferentially. Alternatively, the connecting surfaces of the tie rod 220 and the fixed template 210 are both threaded. Preferably, in this invention, the connecting surfaces of the tie rod 220 and the fixed template 210 are both threaded.

[0050] like Figure 2 and Figure 3 As shown, the lever assembly 100 includes a base assembly 120, a drive assembly 130, a piston assembly 140, a transition bracket 150, a locking element 160, a first position detection module (not shown in the figure), and a control module 180.

[0051] The base assembly 120 includes a base beam 121 and a connecting seat 122. One end of the base beam 121 is connected to the fixed template 210, and the base beam 121 and the connecting seat 122 are slidably connected.

[0052] The base beam 121 and the fixed template 210 are integrally formed. Alternatively, the base beam 121 and the fixed template 210 are fixedly connected. Specifically, the fixed connection can be made by screws or bolts.

[0053] The connection / sliding method between the base beam 121 and the connecting seat 122 includes, but is not limited to, the following examples:

[0054] Example 1: Connecting seat 122 spans the base beam 121 and is located above the base beam 121. The contact surfaces of connecting seat 122 and base beam 121 are both smooth. The connecting seat 122 is driven to slide by the driving assembly 130, thereby driving the connecting seat 122 to slide relative to the base beam 121.

[0055] In a preferred embodiment, to reduce the contact area between the connecting seat 122 and the base beam 121, the base assembly 120 further includes a guide rail 123. The guide rail 123 is disposed on the side of the base beam 121 near the hydraulic cylinder 131 or above the base beam 121. Specifically, the guide rail 123 extends outward from the side edge of the base beam 121, and its guiding direction is the same as that of the pull rod 220. The contact surfaces of the guide rail 123 and the connecting seat 122 are both smoothly designed to avoid a large contact area between the connecting seat 122 and the base beam 121, which would result in high frictional resistance. The edge of the connecting seat 122 can abut against the base beam 121, allowing the connecting seat 122 to slide relative to the base beam 121 after being controlled.

[0056] Example 3: To improve the coordination of sliding between the base beam 121 and the connecting seat 122, the base beam 121 assembly includes a guide rail 123 and pulleys. The guide rail 123 is located on the side of the base beam 121 near the hydraulic cylinder 131, and is formed by an inward recess from the surface of the base beam 121. The guiding direction of the guide rail 123 is the same as the guiding direction of the tie rod 220. At least two mounting slots are provided at the center or edge of the connecting seat 122, and a pulley is installed in each slot. The sliding motion of the connecting seat 122 relative to the base beam 121 is achieved through the cooperation of the pulleys and the guide rail 123.

[0057] like Figure 4As shown, the base beam 121 is made of high-hardness steel, specifically an "H"-shaped steel. Since the bending moment is greatest at the root of the base beam 121, the connection point with the fixed template 210 should be designed to be thicker and stronger. Therefore, this invention sets the base beam 121 into three sections: a first section 1211, a second section 1212, and a third section 1213 connected sequentially. The first section 1211 connects to the fixed template 210. The first section 1211 is designed to be the thickest and strongest. The second section 1212 is narrowed as much as possible while meeting layout and strength requirements to reduce its own weight. The third section 1213 implements a significant tail-end weight-reduction design, shifting the center of gravity of the base beam 121 as far forward as possible, reducing the gravitational moment, and ensuring the stability of the entire beam. Specifically, the weight and width of the first section 1211, the second section 1212, and the third section 1213 decrease sequentially.

[0058] like Figure 5 As shown, the base beam 121 is composed of a first base plate 1214, a second base plate 1215, and a support plate 1216. The support plate 1216 is disposed between the first base plate 1214 and the second base plate 1215, and the first base plate 1214 and the second base plate 1215 are arranged in parallel. Preferably, in this embodiment, there are four support plates 1216, which form a quadrilateral to increase the load-bearing strength of the base beam 121. Both the first base plate 1214 and the second base plate 1215 are configured such that the width gradually narrows from the first segment 1211 to the third segment 1213.

[0059] In this invention, the drive component 130 can be configured as a hydraulic cylinder 131 (i.e., requiring a hydraulic press drive) or an electric cylinder 131. However, since injection molding machines 200 are mostly large pieces of equipment, and the base beam 121 in this invention needs to have a certain weight to support the cylinder 131 and other components, and since hydraulic cylinders have the advantages of generating large thrust and being easy to adjust speed and force, this invention preferably configures the cylinder 131 as a hydraulic cylinder 131.

[0060] Continue reading Figure 2 and Figure 3 The drive assembly 130 includes a hydraulic cylinder 131 and a hydraulic press (not shown in the figure). The side of the hydraulic cylinder 131 is connected to the connecting seat 122, and the output shaft of the hydraulic cylinder 131 is connected to the pull rod 220. The hydraulic cylinder 131 is controlled to be driven and slides with the connecting seat 122, thereby driving the pull rod 220 to move along its guide direction, so as to move the pull rod 220 to a position fixed with the fixed template 210, or to move the pull rod 220 to a position separated from the fixed template 210. The hydraulic press is connected to the hydraulic cylinder 131 through a first pipeline to apply / remove pressure to the hydraulic cylinder 131.

[0061] Since the dimensions of the pull rod 220 in different models of injection molding machines 200 may vary, this invention sets the size of the output shaft of the hydraulic cylinder 131 to be adjustable or adds a converter at the output shaft of the hydraulic cylinder 131. One end of the converter is connected to one end of the output shaft of the hydraulic cylinder 131, and the other end is configured to be adjustable in size, so as to adapt to different sizes / models of pull rods 220 and improve the adaptability of the rod pulling device 100. The adjustable shaft end structure is a conventional technique in the art and will not be described in detail here.

[0062] To prevent the connecting seat 122 from slipping off the end of the base beam 121, i.e., to limit the maximum distance the connecting seat 122 can move, the present invention provides structures including but not limited to the following two examples, specifically:

[0063] Example 1: A stop structure (not shown in the figure) extends outward from the end of the base beam 121 away from the fixed template 210. When the connecting seat 122 abuts against the stop structure, the hydraulic press stops applying pressure, and the connecting seat 122 can slide to its maximum movable distance. However, this structure has some drawbacks. During long-term operation of the injection molding machine 200, this structure is prone to causing the connecting seat 122 to collide with the stop structure, which can lead to scratches between components or deformation of the base beam 121 as a whole.

[0064] In a preferred embodiment, the rod-pulling device 100 further includes a piston assembly 140 and a transition bracket 150. The piston assembly 140 includes a cylinder 141 and a piston rod 142. The cylinder 141 is fixedly mounted on the first section 1211 of the base beam 121. The first end M of the piston rod 142 can at least partially embed into the cylinder 141, and the second end N of the piston rod 142 is connected to one end of the transition bracket 150. The other end of the transition bracket 150 is connected to the connecting seat 122 to limit the maximum displacement of the connecting seat 122. In this example, preferably, the overall structure of the transition bracket 150 is "L"-shaped. Furthermore, the present invention incorporates a lightweight design for the transition bracket 150, aiming to make it as lightweight as possible while maintaining strength, thus avoiding the problem of the base beam 121 bending due to excessive load on the end furthest from the fixed template 210.

[0065] In this example, the piston assembly 140 also includes a support structure 143, through which both ends of the cylinder 141 are fixedly mounted on the first section 1211 of the base beam 121. The support structure 143 has a through hole at its center, allowing the cylinder 141 to pass through. The bottom of the support structure 143 is fixedly connected to the base beam 121 by fasteners. These fasteners can be screws, rivets, or bolts.

[0066] In this example, the transition bracket 150 also includes a through hole through which the second end N of the piston rod 142 can pass and be fixedly connected to the transition bracket 150.

[0067] To avoid the problem that the hydraulic cylinder 131 pushes the connecting seat 122 to slide in the opposite direction due to the thrust generated during the injection molding process, the rod pulling device 100 of the present invention also includes a locking member 160. The locking member 160 can be set on the fixed template 210 or on the base beam 121. The hydraulic cylinder 131 is provided with a slot in the axial direction near the fixed template 210. The locking member 160 can cooperate with the slot to lock the hydraulic cylinder 131 and the fixed template 210 or the base beam 121.

[0068] The locking element 160 includes a lock body and a latch (not shown in the figure). The lock body is mounted on the fixed template 210 or on the base beam 121. The latch is mounted on the lock body and is configured to be controllably extended or retracted. A hydraulic press is connected to the locking element 160 via a second pipeline and is used to drive the latch.

[0069] In some embodiments, the fixed template 210 extends outward to form a flange structure, and the edge of the cylinder 131 can abut against the flange structure.

[0070] like Figure 6 As shown, the rod-pulling device 100 also includes a first position detection module, which includes a first position sensor 171. The first position sensor 171 is disposed on the end of the base beam 121 near the fixed template 210. The first position sensor 171 can be located above or below the base beam 121. The first position sensor 171 is disposed on the first section 1211 of the base beam 121 and is used to detect whether the connecting seat 122 is in the first position abutting against the base beam 121.

[0071] The first position detection module also includes a second position sensor 172, which is disposed at the end of the third section 1213 of the base beam 121 and is used to detect whether the connecting seat 122 is in a second position that is far away from the maximum moving distance of the base beam 121.

[0072] The control module 180, the first position detection module, and the hydraulic press are electrically connected to the control module 180 to control the operating state of the hydraulic press based on the detection information from the first position detection module. Specifically, when the first position sensor 171 detects that the connecting seat 122 is in the first position, the control module stops the hydraulic press and simultaneously extends the locking tongue in the locking member to lock the cylinder 131 to the locking member. When the second position sensor 172 detects that the connecting seat 122 is in the second position, the control module stops the hydraulic press.

[0073] The control module 180 is also configured to, upon receiving an instruction to move the connecting seat 122 from the first position to the second position, control the hydraulic press to depressurize the second pipe, causing the locking tongue of the locking element to retract, and the cylinder 131 to release the lock. Then, the control module controls the hydraulic press to apply pressure to the first pipe, so that the cylinder 131 can drive the connecting seat 122 to slide on the guide rail 123 in a direction away from the fixed template 210, thereby causing the pull rod 220 to disengage from the fixed template 210.

[0074] The control module 180 is also configured to, upon receiving an instruction that the connecting seat 122 needs to be moved from the second position to the first position, control the hydraulic press to depressurize the first pipe, so that the oil cylinder 131 can drive the connecting seat 122 to move on the guide rail 123 in a direction close to the fixed template 210, thereby driving the pull rod 220 to be fixedly connected to the fixed template 210.

[0075] like Figure 1 As shown, in other embodiments of the present invention, an injection molding machine 200 is also provided, including a film-forming frame composed of a tie rod 220 and a fixed template 210, a mold, and a rod-pulling device 100 as described in any of the above.

[0076] Generally, the film-forming frame consists of two fixed templates 210 and four tie rods 220. The two fixed templates 210 are placed vertically, and the four tie rods 220 are arranged in a horizontally symmetrical manner, two at the top and two at the bottom, passing through one fixed template 210 and being fixedly connected to the other fixed template 210. The rod-pulling device 100 of the present invention is installed on either of the two tie rods 220. There is a certain accommodating space between the two fixed templates 210 as a working area, which is used to place the mold required for the production process.

[0077] It should be noted that this tool area can accommodate molds of different types and sizes. Operators can adjust the distance between the two fixed templates 210 and between each tie rod 220 according to different types of molds.

[0078] like Figure 7 As shown, the injection molding machine 200 also includes a camera module 240, a second position detection module 250, and a control system 230. The camera module 240 is positioned above the film-forming frame and is used to detect whether a mold exists within the working area and to acquire the mold's status. The second position detection module 250 is used to detect whether the mold has reached a designated position. The camera module 240, the second position detection module 250, and the control module 230 are all connected to the control system 230, and the control system 230 can control each module to perform its operation.

[0079] Specifically, the camera module 240 captures images of the working area and uploads them to the control system 230. The control system 230 determines whether a mold exists in the working area. If it does, it further determines whether the mold is outside the film-forming frame. If it is outside the film-forming frame, it sends a command to the control module 180 to open the pull rod 220 (that is, to move the pull rod 220 away from the fixed template 210, which is also a command to move the connecting seat 122 from the first position to the second position). The control module 180 then executes the steps described above.

[0080] When the second position detection module 250 detects that the mold is placed in the film-forming frame, it sends the detection information to the control system 230. The control system 230 controls the control module 180 to restore the pull rod 220 to the initial position fixed with the fixed template 210 (that is, controls the connecting seat 122 to move from the second position to the first position). The specific control steps are as described above.

[0081] In some other embodiments of the present invention, the injection molding machine 200 further includes an image processing module 260, which is electrically connected to the control system 230. The image processing module 260 is used to process images captured by the camera module 240. The image processing module 260 includes, but is not limited to, storing and processing images (image comparison and image sample model establishment, etc.).

[0082] like Figure 8 As shown, in some embodiments, a control method for the pull rod device 100 is also provided, including the injection molding machine 200 described above; the control method includes:

[0083] Step S110: In response to receiving a command to open the control lever 220. The command to open the lever 220 can be obtained by an operator inputting a control command into the control system 230, or as described in steps S111 to S114, where the camera module 240 detects a mold above the film-forming frame, and then controls the lever-pulling device 100 to move the lever 220.

[0084] In step S120, the hydraulic press is controlled to depressurize the lock body through the second pipeline, so that the locking tongue of the locking member 160 is in a retracted state, thereby releasing the oil cylinder 131 from the locked state.

[0085] In step S130, the hydraulic press is controlled to pressurize the cylinder 131 through the first pipeline so that the cylinder 131 can be driven and slide relative to the base beam 121 with the connecting seat 122, thereby causing the tie rod 220 to separate from the fixed module.

[0086] Step S140: Obtain the position of connector 122.

[0087] Step S150: Determine whether the position of the connecting seat 122 has reached the second position. The second position refers to the position where the pull rod 220 is away from the initial position fixed to the fixed template 210, that is, the maximum movable displacement of the connecting seat 122 away from the fixed template 210.

[0088] Step S160: If yes, control the hydraulic press to stop running. If no, proceed to step S140.

[0089] Step S110 further includes:

[0090] Step S111: Acquire image information of the working area. The working area refers to the area between the two fixed templates 210 and the area above the film-forming frame. The camera module 240 captures an image of the working area and uploads it to the control system 230. The control system 230 identifies the acquired image information to determine if a mold exists within the working area. If a mold exists, the hydraulic cylinder 131 is activated, causing the pull rod 220 to be in the first position, allowing the operator to place the mold.

[0091] Step S112: Determine whether a mold exists within the working area based on the acquired image information. Specific steps include: recognizing the acquired image information. The image recognition method can be: first, recognizing the acquired image information, breaking the image information down into multiple pixels, comparing these multiple pixels with pixels in a preset image, and determining whether a mold exists within the working area based on the comparison results. If the comparison results are the same, a mold exists within the working area; if the comparison results are different, a mold does not exist within the working area. The preset image can be obtained by the operator taking photos of the working area above the film-forming frame and between the two fixed templates 210 from different angles; and / or, by using each image acquired by the camera module 240 as a data sample. The detailed process of comparing the image pixels is existing technology and not an inventive point of this invention, therefore it will not be described further here.

[0092] Step S130: If yes, determine whether the mold is outside the film-forming frame based on the obtained image information. If no, proceed to step S110.

[0093] Step S140: If yes, issue a command to open lever 220. If no, stop the loop.

[0094] In some other embodiments of the present invention, the control method further includes:

[0095] Step S210, in response to lever 220 being in the open state.

[0096] Step S220: Determine whether the mold is placed in the designated position.

[0097] Step S230: If yes, then the mold placement is complete.

[0098] Step S220 further includes:

[0099] Step S221: Obtain the mold's position information. The second position detection module 250 obtains the mold's position and uploads the obtained position information to the control system 230.

[0100] Step S222: Determine whether the position of the mold has reached the specified position.

[0101] Step S223: If yes, then obtain the image information of the current mold.

[0102] Step S224: Compare the acquired image information with a preset image. The preset image can be set as images obtained by the operator from different angles when the mold is placed inside the film-forming frame, and / or it can be obtained by generating an image sample model from each image acquired by the shooting module.

[0103] Step S225: If the comparison value between the image information and the preset image reaches a preset threshold, the mold placement is complete. The preset threshold can be set based on the operator's experience or obtained from the nameplate of the image processing module 260.

[0104] In some other embodiments of the present invention, the control method further includes:

[0105] Step S310, in response to the completion of mold placement.

[0106] In step S320, the hydraulic press is controlled to depressurize the cylinder 131 through the first pipeline, so that the pull rod 220 returns to the initial position fixed with the fixed template 210.

[0107] Step S330: Obtain the position of the connector 122. Obtain the detection information from the first position sensor 171 and upload the detection information to the control system 230.

[0108] Step S340: Determine whether the position of the connector 122 is in the first position.

[0109] In step S350, if yes, the hydraulic press is controlled to stop depressurizing the first pipeline, and simultaneously the hydraulic press is controlled to apply pressure to the lock body of the locking member 160 through the second pipeline, so that the locking tongue of the locking member 160 extends to engage with the slot of the oil cylinder 131. If no, step S330 is executed.

[0110] In other embodiments of the present invention, a computer is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it performs steps related to the creation of image samples / models, mold position detection, and movement of the tie rod 220. When the processor executes the computer program, it implements and applies the control method of the injection molding machine 200 described above to the injection molding machine 200.

[0111] In other embodiments of the present invention, a computer-readable storage medium is also provided, on which a computer program is stored. The computer program is executed by a processor using the control method of the injection molding machine 200 described above. When the computer program is executed by the processor, it implements the control method of the injection molding machine 200 described above and applies it to the injection molding machine 200 described above.

[0112] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, prediction models, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0113] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0114] Those skilled in the art will understand that, by adding a rod-pulling device 100 to the pull rod 220 of the film-forming frame of the injection molding machine 200, the present invention uses the rod-pulling device 100 to drive the pull rod 220 to move. Compared with the prior art, this frees up the top space of the fixed template 210, which is beneficial to the installation layout of other equipment, enhances the integration of the equipment, saves workshop space and area, and thus increases the unit output value.

[0115] Furthermore, the base beam 121 is designed as a three-section frame beam with different weights and structures. With a unique mechanical structure distribution design, the weight of the base beam 121 is controlled within a reasonable range. It can meet the working conditions without additional support, thus achieving a double saving of materials and space.

[0116] Furthermore, since the base beam 121 is rigidly connected only to the fixed template 210, which serves as the reference for the injection molding machine 200, the entire connection is very stable and unaffected by external factors. In addition, the guide rail 123 further reduces the contact area between the base beam 121 and the connecting seat 122, making the entire device operate more smoothly and reliably.

[0117] Furthermore, the present invention includes a position detection module, a camera module 240, and a control module 180, so that the injection molding machine 200 can complete the entire process of pulling the pull rod 220 out before mold placement and restoring the pull rod 220 to its initial state after mold placement, thereby improving the automation level of the equipment and greatly improving the efficiency of the mold picking / placing process.

[0118] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A rod-pulling device for an injection molding machine, characterized in that, The injection molding machine includes a fixed mold plate and a pull rod penetrating the fixed mold plate; the pull rod device includes: A base assembly includes a base beam and a connecting seat, one end of the base beam being connected to the fixed template, and the base beam being slidably connected to the connecting seat; A drive assembly includes a hydraulic cylinder, the side of which is connected to the connecting seat, and the output shaft of which is connected to the pull rod; the hydraulic cylinder is controlled to be driven and slides with the connecting seat, thereby driving the pull rod to move along its guide direction; Also includes: A piston assembly includes a cylinder and a piston rod. The cylinder is fixedly mounted on the base beam on the side near the fixed template. A first end of the piston rod is embedded in the cylinder, and a second end of the piston rod extends away from the fixed template. A transition bracket, one end of which is connected to the connecting seat, and the other end of which is connected to the second end of the piston rod, to limit the maximum movable displacement of the connecting seat; The base beam is configured as a three-section frame beam, comprising a first section, a second section, and a third section connected in sequence. The first section is connected to the fixed template, and the weight and width of the first section, the second section, and the third section decrease sequentially. The cylinder is fixedly installed on the first section of the base beam.

2. The rod-pulling device for an injection molding machine according to claim 1, characterized in that, The base assembly also includes a guide rail, which extends outward from the side edge of the base beam, and the guide rail has the same guiding direction as the pull rod. The contact surfaces of the guide rail and the connecting seat are both smoothly designed, and the edge of the connecting seat can abut against the base beam.

3. The rod-pulling device for an injection molding machine according to claim 1, characterized in that, The drive assembly also includes a hydraulic press, which is connected to the cylinder via a first pipeline to apply / remove pressure to the cylinder.

4. The rod-pulling device for an injection molding machine according to claim 3, characterized in that, Also includes Locking components are provided on the fixed template or on the base beam; The hydraulic cylinder is provided with a groove along its axial direction near the fixed template, and the locking member can cooperate with the groove to lock the hydraulic cylinder and the fixed template or the base beam.

5. The rod-pulling device for an injection molding machine according to claim 4, characterized in that, The locking component includes a lock body and a lock tongue, wherein the lock body is disposed on the fixed template or on the base beam; The latch is disposed on the lock body, and the latch is configured to be controllably extended or retracted. The hydraulic press is connected to the lock body via a second pipeline and is used to drive the lock tongue.

6. The rod-pulling device for an injection molding machine according to claim 1, characterized in that, The connecting surfaces of the tie rod and the fixed template are both smooth surfaces in the circumferential direction; or... The connection surfaces of the tie rod and the fixed template are both threaded in the circumferential direction.

7. The rod-pulling device for an injection molding machine according to claim 3, characterized in that, The base beam is set as an "H" shaped steel structure.

8. The rod-pulling device for an injection molding machine according to claim 5, characterized in that, Also includes: The first position detection module includes a first position sensor and a second position sensor. The first position sensor is disposed on the first section of the base beam and is used to detect whether the connecting seat is in a first position abutting against the base beam. The second position sensor is disposed on the end of the third section of the base beam and is used to detect whether the connecting seat is in a second position that is far away from the base beam by the maximum movement distance. The control module is electrically connected to the first position detection module and the hydraulic press, respectively, to control the operating state of the hydraulic press according to the detection information of the first position detection module.

9. An injection molding machine, characterized in that, It includes a molding frame consisting of a tie rod and a fixed template, a mold, and a rod-pulling device for the injection molding machine as described in claim 8.

10. The injection molding machine according to claim 9, characterized in that, Also includes: A camera module is used to detect whether the mold exists in the working area and to acquire the status of the mold; The second position detection module is used to detect whether the mold is placed in the designated position; The control system includes a camera module, a second position detection module, and a control module, all of which are electrically connected to the control system, and the control system is capable of controlling each module to perform its operation.

11. A control method for an injection molding machine, characterized in that, The control method can be applied to any one of the injection molding machines described in claims 9 to 10; the control method includes: In response to receiving a command to open the lever; The hydraulic press is controlled to depressurize the lock body through the second pipeline, causing the locking tongue of the locking element to retract. The hydraulic press is controlled to pressurize the oil cylinder through the first pipeline; Get the position of the connector; Determine whether the position of the connector has reached the second position; If so, the hydraulic press is stopped and the lever is in the open state.

12. The control method for an injection molding machine according to claim 11, characterized in that, The step of responding to receiving a command to control the lever to open includes: Retrieve image information of the work area; Based on the acquired image information, determine whether a mold exists within the working area; If so, determine whether the mold is outside the mold-forming frame based on the obtained image information; If so, a command is issued to open the lever.

13. The control method for an injection molding machine according to claim 11, characterized in that, In response to the lever being in the open state, Determine whether the mold has been placed in the designated position; If so, then the mold placement is complete.

14. The control method for an injection molding machine according to claim 13, characterized in that, The step of determining whether the mold is placed in the designated position further includes: Obtain the position information of the mold; Determine if the mold has reached the designated position; If so, then obtain the image information of the current mold; The acquired image information is compared with the preset image; If the comparison value between the image information and the preset image reaches a preset threshold, the mold placement is complete.

15. The control method for an injection molding machine according to claim 14, characterized in that, Also includes: In response to the completion of mold placement; The hydraulic press is controlled to depressurize the oil cylinder through the first pipeline, so that the pull rod returns to the initial position fixed with the fixed template; Get the position of the connector; Determine whether the connector has reached the first position; If so, the hydraulic press is controlled to stop depressurizing the first pipeline, and at the same time, the hydraulic press is controlled to apply pressure to the lock body of the locking member through the second pipeline, so that the locking tongue of the locking member extends out to lock the locking tongue into the groove of the oil cylinder.

16. A computer comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the control method for the injection molding machine as described in any one of claims 11 to 15; and applies it to the injection molding machine as described in any one of claims 9 and 10.

17. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the control method of the injection molding machine as described in any one of claims 11 to 15 and is applied to the injection molding machine as described in any one of claims 9 and 10.

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