A two-platen injection molding machine automatic mold adjustment method, device, equipment and storage medium

Abstract

The invention discloses an automatic mold adjustment method, device, equipment and storage medium for a two-plate injection molding machine, and belongs to the field of mold adjustment technology. After the mold is installed, a movable mold plate and a fixed mold plate are tightened, and the thickness of the mold is determined based on the reading of an electronic ruler of the movable mold plate position and the minimum distance of the mold plate. If the thickness of the mold is within the adjustable mold range, the displacement adjustment amount of the piston of the locking cylinder is calculated based on the thickness of the mold, the reference mold thickness and the tooth pitch of the annular teeth on the guide pin. The expected position of the piston of the locking cylinder is calculated based on the piston position of the locking cylinder corresponding to the reference mold thickness, the displacement adjustment amount and the tooth pitch. The piston of the locking cylinder is moved to the expected position, driving a brake assembly to move to the brake position, and then controlling the brake assembly to brake, thereby improving the mold adjustment efficiency, reducing energy consumption and noise, and increasing the service life of the brake assembly and the guide pin.

Description

Technical Field

[0001] The present invention relates to the field of mold adjustment technology, and in particular to an automatic mold adjustment method, device, equipment and storage medium for a two-platen injection molding machine. Background Art

[0002] The two-platen injection molding machine is favored by the market for its compact structure, strong rigidity, large mold opening force and mold opening stroke, and precise control of clamping force. The working principle of the two-platen injection molding machine is to close the mold through the mold clamping device, melt the plastic through the injection device, and then inject the plastic melt into the mold cavity in the mold. After pressure-maintaining cooling and shaping, the ejection mechanism on the injection device pushes the finished product out of the mold cavity to complete an injection molding process.

[0003] After the mold clamping device closes the mold, it is usually necessary to use the brake assembly to lock the position of the mold. When the two-platen injection molding machine needs to replace molds of different thicknesses during the production process, the brake position of the brake assembly needs to be readjusted. The existing adjustment method is usually to step along the guide column with small displacements multiple times, and blindly brake after each step until the mold is locked in. Although this method can eventually successfully lock the mold, the process is complicated, energy consumption is high, efficiency is low, and noise is high. In addition, multiple blind lock failures will cause certain impact damage to the tooth surfaces of the brake assembly and the guide column, which will reduce the service life of the brake assembly and the guide column in the long run. Summary of the invention

[0004] The present invention provides an automatic mold adjustment method, device, equipment and storage medium for a two-platen injection molding machine, so as to improve the mold adjustment efficiency, reduce energy consumption and noise, and increase the service life of a brake assembly and a guide column.

[0005] In a first aspect, the present invention provides an automatic mold adjustment method for a two-platen injection molding machine, comprising:

[0006] After the mold is installed, the movable mold plate and the fixed mold plate are closed, and the thickness of the mold is determined based on the reading of the movable mold plate position electronic ruler and the minimum distance between the mold plates;

[0007] If the thickness of the mold is within the adjustable mold range, the displacement adjustment amount of the piston of the mold locking cylinder is calculated based on the thickness of the mold, the reference mold thickness and the pitch of the annular teeth on the guide pin;

[0008] Calculating a desired position of the piston of the clamping cylinder based on the piston position of the clamping cylinder corresponding to the reference mold thickness, the displacement adjustment amount, and the tooth pitch;

[0009] The piston of the clamping cylinder is moved to the desired position, driving the brake assembly to move to the brake position, and then the brake assembly is controlled to brake.

[0010] Optionally, after the mold is installed and before the movable mold plate and the fixed mold plate are closed, the following steps may be further included:

[0011] Calculate the difference between the total stroke of the piston of the clamping cylinder and the safe distance of the piston of the clamping cylinder, the maximum stretching amount of the clamping mechanism under the maximum clamping force, and the tooth pitch of the annular teeth on the guide pin as the maximum demoulding position corresponding to the reference mold thickness;

[0012] Calculate the difference between the convex tooth width and the concave tooth width of the annular tooth on the guide post as the tooth gap between the guide post and the brake assembly after the brake is engaged;

[0013] The sum of the maximum demoulding position and the tooth gap is calculated as the piston position of the clamping cylinder corresponding to the reference mold thickness.

[0014] Optionally, after the mold is installed and before the movable mold plate and the fixed mold plate are closed, the following steps may be further included:

[0015] Determine the distance between the mold mounting surface of the fixed mold plate and the center surface of the protruding tooth on the guide pin closest to the fixed mold plate as the first distance;

[0016] Moving the piston of the mold locking cylinder to the piston position of the mold locking cylinder corresponding to the reference mold thickness;

[0017] Move the movable platen until the concave teeth on the brake assembly closest to the fixed platen are meshed with the convex teeth on the guide column closest to the fixed platen;

[0018] Determine the distance from the mold mounting surface of the movable mold plate to the center surface of the concave tooth on the brake assembly closest to the fixed mold plate as the second distance;

[0019] The difference between the first distance and the second distance is calculated to obtain a reference mold thickness.

[0020] Optionally, in a mold-free state, the movable platen is molded to the bottom until the absolute value reading of the movable platen position electronic ruler is zero and fixed, wherein the absolute value reading of the movable platen position electronic ruler is the real-time reading currently displayed by the movable platen position electronic ruler. After the mold is installed, the movable platen and the fixed platen are tightly closed, and the thickness of the mold is determined based on the reading of the movable platen position electronic ruler and the minimum distance between the templates, including:

[0021] After the mold is installed, the movable mold plate is driven to move toward the fixed mold plate;

[0022] When it is detected that the absolute value reading of the moving platen position electronic ruler no longer changes, a preset driving force is applied to the moving platen until the absolute value reading of the moving platen position electronic ruler no longer changes, and the current absolute value reading of the moving platen position electronic ruler is recorded;

[0023] The sum of the current absolute value reading of the electronic ruler of the moving plate position and the minimum distance of the plate is calculated to obtain the thickness of the mold.

[0024] Optionally, the displacement adjustment amount of the piston of the clamping cylinder is calculated based on the thickness of the mold, the reference mold thickness and the pitch of the annular teeth on the guide pin, and the calculation formula is as follows:

[0025]

[0026] in, The displacement adjustment amount of the piston of the clamping cylinder, is the thickness of the mold, is the base mold thickness, is the pitch of the annular teeth on the guide pin, Express The result is rounded.

[0027] Optionally, calculating the expected position of the piston of the clamping cylinder based on the piston position of the clamping cylinder corresponding to the reference mold thickness, the displacement adjustment amount, and the tooth pitch includes:

[0028] The piston position of the clamping cylinder corresponding to the reference mold thickness is taken as the first position, and the sum of the first position and the displacement adjustment amount is calculated to obtain the second position of the piston of the clamping cylinder, and the sum of the first position and the tooth pitch is calculated to obtain the third position of the piston of the clamping cylinder;

[0029] When the second position is greater than or equal to the first position and less than the third position, the second position is used as the expected position of the piston of the clamping cylinder;

[0030] When the second position is greater than or equal to the third position, calculating the difference between the second position and the tooth pitch as the expected position of the piston of the clamping cylinder;

[0031] When the second position is smaller than the first position, the sum of the second position and the tooth pitch is calculated as the expected position of the piston of the clamping cylinder.

[0032] Optionally, the automatic mold adjustment method of the two-platen injection molding machine also includes:

[0033] If the thickness of the mold is within the adjustable mold range, the relative position reading of the moving platen position electronic ruler is reset to zero, wherein the relative position reading of the moving platen position electronic ruler = the real-time absolute value reading of the moving platen position electronic ruler + the minimum distance of the template - the current mold thickness;

[0034] Calculate the difference between the maximum distance between the movable platen and the fixed platen and the thickness of the mold as the current maximum mold opening stroke;

[0035] After the expected position of the piston of the mold locking cylinder is calculated, the difference between the expected position and the tooth gap between the guide column and the brake assembly is calculated as the current maximum allowable demoulding position.

[0036] Optionally, the automatic mold adjustment method of the two-platen injection molding machine also includes:

[0037] If the thickness of the mold is not within the adjustable mold range, an alarm message of mold thickness exceeding the limit and mold adjustment failure is issued.

[0038] In a second aspect, the present invention further provides an automatic mold adjustment device for a two-platen injection molding machine, comprising:

[0039] A mold thickness determination module is used to close the movable platen and the fixed platen after the mold is installed, and determine the thickness of the mold based on the reading of the movable platen position electronic ruler and the minimum distance between the templates;

[0040] A displacement adjustment amount calculation module is used to calculate the displacement adjustment amount of the piston of the clamping cylinder based on the thickness of the mold, the reference mold thickness and the tooth pitch of the annular teeth on the guide pin if the thickness of the mold is within the adjustable mold range;

[0041] An expected position calculation module, used for calculating an expected position of the piston of the clamping cylinder based on the piston position of the clamping cylinder corresponding to the reference mold thickness, the displacement adjustment amount and the tooth pitch;

[0042] The brake control module is used to move the piston of the clamping cylinder to the desired position, drive the brake assembly to move to the brake position, and then control the brake assembly to brake.

[0043] In a third aspect, the present invention further provides an electronic device, comprising:

[0044] one or more processors;

[0045] A storage device for storing one or more programs;

[0046] When the one or more programs are executed by the one or more processors, the one or more processors implement the automatic mold adjustment method for a two-platen injection molding machine as provided in the first aspect of the present invention.

[0047] In a fourth aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the automatic mold adjustment method for a two-platen injection molding machine as provided in the first aspect of the present invention.

[0048] The automatic mold adjustment method for a two-plate injection molding machine provided by the present invention comprises the following steps: after the mold is installed, the movable mold plate and the fixed mold plate are tightened, and the thickness of the mold is determined based on the reading of the movable mold plate position electronic ruler and the minimum distance between the mold plates; if the thickness of the mold is within the adjustable mold range, the displacement adjustment amount of the piston of the mold locking cylinder is calculated based on the thickness of the mold, the reference mold thickness and the tooth pitch of the annular teeth on the guide pin; the desired position of the piston of the mold locking cylinder is calculated based on the piston position of the mold locking cylinder corresponding to the reference mold thickness, the displacement adjustment amount and the tooth pitch; the piston of the mold locking cylinder is moved to the desired position, the brake assembly is driven to move to the brake position, and then the brake assembly is controlled to brake, so as to complete the mold adjustment, thereby improving the brake success rate and brake accuracy, avoiding the problems of high energy consumption and high noise caused by multiple blind clamping, improving the mold adjustment efficiency, reducing energy consumption and noise, avoiding the damage to the tooth surface of the brake assembly and the guide pin caused by multiple blind clamping, and improving the service life of the brake assembly and the guide pin.

[0049] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0051] Figure 1 It is a side view of a two-platen injection molding machine;

[0052] Figure 2 A flow chart of an automatic mold adjustment method for a two-platen injection molding machine provided by the present invention;

[0053] Figure 3 A schematic structural diagram of an automatic mold adjustment device for a two-platen injection molding machine provided by the present invention;

[0054] Figure 4 The present invention provides a schematic structural diagram of an electronic device.

[0055] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0056] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0057] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0058] There are two main ways to set up the clamping cylinder and the brake of the existing two-platen injection molding machine: the first is that the clamping cylinder is set on the movable platen, the brake assembly is set on the outer end face of the piston of the clamping cylinder, the guide column can be fixedly installed on the fixed platen, the clamping cylinder piston drives the brake assembly, and can be dynamically driven to obtain the brake position required by the corresponding guide column; the second is that the clamping cylinder is set on the fixed platen, the brake assembly is set on the movable platen, the guide column directly serves as the piston rod of the clamping cylinder, and can be dynamically driven to obtain the guide column position required by the corresponding brake.

[0059] The core algorithms of the two structures for the change in the new brake position and the theoretical brake position of the drawing under the theoretical reference mold thickness of the drawing after replacing any new thickness of the mold are consistent. The present invention only takes the first method as an example to explain the algorithm in detail.

[0060] Figure 1 A side view of a two-platen injection molding machine is shown in FIG. Figure 1As shown, the two-plate injection molding machine includes a fixed platen 1, a movable platen 2, a guide column 3, a brake assembly 4, a mold locking cylinder 5, an electronic ruler 6 for the position of the mold locking cylinder piston, an electronic ruler 7 for the position of the movable platen, and a mold shifting drive assembly 8, wherein the guide column 3 includes a plurality of (exemplarily, 4 guide columns), and each guide column 3 is provided with a brake assembly 4 and a mold locking cylinder 5. The guide column 3 and the mold shifting drive assembly 8 are both fixedly connected to the fixed platen 1, and the mold shifting drive assembly 8 is connected to the movable platen 2 through the mold shifting drive assembly telescopic rod 81, and the mold shifting drive assembly 8 can drive the mold shifting drive assembly telescopic rod 81 to extend and retract, thereby driving the movable platen 2 to move along the guide column 3. The mold locking cylinder 5 is fixed on the movable platen 2, and the brake assembly 4 is provided on the outer end surface of the mold locking cylinder piston 51. The guide post 3 is provided with a guide post annular tooth 31, and the brake assembly 4 is provided with a brake concave tooth 41. When the brake is required, the clamping cylinder piston 51 drives the brake assembly 4 to the brake position, and then the brake assembly 4 is braked, so that the guide post annular tooth 31 is engaged with the brake concave tooth 41. The mold 9 is set between the fixed mold plate 1 and the movable mold plate 2. Before pressing, the two parts of the mold 9 are respectively installed on the mold mounting surface of the fixed mold plate 1 and the mold mounting surface of the movable mold plate 2. The clamping cylinder piston position electronic ruler 6 is used to indicate the position of the clamping cylinder piston, and the movable mold plate position electronic ruler 7 is used to indicate the position of the movable mold plate.

[0061] Figure 2 This is a flow chart of a two-platen injection molding machine automatic mold adjustment method provided by the present invention. This embodiment is applicable to the situation where the two-platen injection molding machine is automatically adjusted after the mold is replaced. The method can be performed by the two-platen injection molding machine automatic mold adjustment device provided by the embodiment of the present invention. The device can be implemented by software and / or hardware, and is usually configured in an electronic device, such as Figure 2 As shown, the automatic mold adjustment method of the two-platen injection molding machine specifically includes the following steps:

[0062] In the embodiment of the present invention, before performing automatic mold adjustment, some parameters of the two-platen injection molding machine need to be determined, including:

[0063] The total stroke of the clamping cylinder piston, that is, the total stroke of the clamping cylinder piston;

[0064] Maximum mold thickness, that is, the maximum thickness of the mold that the two-platen injection molding machine can process;

[0065] Minimum mold thickness, that is, the minimum thickness of the mold that the two-platen injection molding machine can process;

[0066] Base mold thickness;

[0067] The minimum distance between the mold mounting surface of the fixed mold plate and the mold mounting surface of the movable mold plate;

[0068] The maximum distance between the templates is the maximum distance between the mold mounting surface of the fixed template and the mold mounting surface of the movable template;

[0069] The annular tooth parameters of the brake and guide post include the concave tooth width P1, the convex tooth width P2, the tooth pitch P=P1+P2, and the total tooth gap δ=P2-P1 after the guide post tooth and the brake tooth are engaged;

[0070] The piston position of the clamping cylinder corresponding to the reference mold thickness.

[0071] These parameters can be directly obtained from the drawings of the two-platen injection molding machine, or can be obtained through actual measurement and calculation, and the embodiments of the present invention are not limited thereto.

[0072] Among them, the piston position of the clamping cylinder corresponding to the reference mold thickness can be obtained based on other parameters obtained from the drawing. The specific calculation method is as follows:

[0073] First, calculate the difference between the total stroke of the piston of the clamping cylinder and the safe distance of the piston of the clamping cylinder (generally set to 0-5mm), the maximum stretching amount of the clamping mechanism under the maximum clamping force (generally set to 0-15mm), and the tooth pitch P of the annular teeth on the guide pin as the maximum demoulding position corresponding to the reference mold thickness, that is, the maximum demoulding position S corresponding to the reference mold thickness. 脱 =Total stroke of the piston of the clamping cylinder - safety distance - tooth pitch P - maximum stretching of the clamping mechanism under maximum clamping force.

[0074] Then, the difference between the convex tooth width and the concave tooth width of the annular tooth on the guide post is calculated as the tooth gap between the guide post and the brake assembly after the brake is engaged, that is, the total tooth gap δ=P2-P1 after the guide post tooth and the brake tooth are engaged.

[0075] Finally, calculate the maximum demoulding position S corresponding to the reference mold thickness 脱 The piston position of the clamping cylinder corresponding to the reference mold thickness is S 脱 +δ.

[0076] Among them, the reference mold thickness can be obtained by the following method:

[0077] 1. Determine the distance between the mold mounting surface of the fixed mold plate and the center surface of the protruding tooth on the guide pin closest to the fixed mold plate as the first distance L1.

[0078] 2. Control the piston of the clamping cylinder to move to the piston position S of the clamping cylinder corresponding to the reference mold thickness. 脱 +δ, and fixed.

[0079] 3. The mold transfer drive assembly drives the movable mold plate to move until the concave tooth on the brake assembly closest to the fixed mold plate engages with the convex tooth on the guide column closest to the fixed mold plate.

[0080] 4. Determine the distance from the mold mounting surface of the movable mold plate to the center surface of the concave tooth on the brake assembly closest to the fixed mold plate as the second distance L2.

[0081] 5. Calculate the difference between the first distance L1 and the second distance L2 to obtain the reference mold thickness H 0 =L1-L2.

[0082] It should be noted that, in some embodiments of the present invention, if the first distance L1 and the second distance L2 are already marked on the drawing of the two-platen injection molding machine, the difference between the first distance L1 and the second distance L2 is directly calculated to obtain the reference mold thickness H 0 =L1-L2.

[0083] When the distance between the fixed platen and the movable platen's respective mold mounting surfaces is the reference mold thickness, and the position of the locking cylinder piston corresponding to the brake position is δ+S, as long as the processing and installation of the parts are completed according to the requirements of the technical drawings, at this time, the convex and concave teeth of the guide column and the brake assembly are completely aligned, so that the brake can be directly completed.

[0084] The remaining parameters, such as the total stroke of the clamping cylinder piston, the maximum mold thickness, the minimum mold thickness, the minimum distance between the templates, the maximum distance between the templates, the annular tooth parameters of the brake and the guide column are all known parameters.

[0085] In addition, before automatic mold adjustment, move the piston of the clamping cylinder to the bottom of the movable mold plate side, and use the position of the clamping cylinder piston to the bottom of the movable mold plate side as the zero position to calibrate the electronic ruler of the clamping cylinder piston position.

[0086] S101. After the mold is installed, the movable mold plate and the fixed mold plate are closed and the thickness of the mold is determined based on the reading of the movable mold plate position electronic ruler and the minimum distance between the mold plates.

[0087] After determining the above parameters, install the new mold to the mold installation surface of the movable mold plate and the fixed mold plate. After the mold is installed, close the movable mold plate and the fixed mold plate, and determine the thickness of the mold based on the reading of the movable mold plate position electronic ruler and the minimum distance between the templates.

[0088] For example, the movable platen is closed to the bottom without a mold until the absolute value reading of the movable platen position electronic ruler is zero and fixed. At this time, the distance between the movable platen and the fixed platen is accurately measured and verified to be consistent with the theoretical value on the drawing, and the measured value is used as the minimum template distance L. The absolute value reading of the movable platen position electronic ruler is the real-time reading currently displayed by the movable platen position electronic ruler.

[0089] After the mold is installed, the mold-shifting drive assembly drives the movable platen to move toward the fixed platen and detects the absolute value reading of the movable platen position electronic ruler. When it is detected that the absolute value reading of the movable platen position electronic ruler no longer changes, the mold-shifting drive assembly applies a preset driving force to the movable platen until the absolute value reading of the movable platen position electronic ruler no longer changes. At this time, it is confirmed that the mold is completely closed and the current absolute value reading of the movable platen position electronic ruler is recorded. Calculate the sum of the current absolute value reading of the movable platen position electronic ruler and the minimum distance L of the template to obtain the current mold thickness H 1 .

[0090] S102. If the thickness of the mold is within the adjustable mold range, the displacement adjustment amount of the piston of the clamping cylinder is calculated based on the thickness of the mold, the reference mold thickness, and the pitch of the annular teeth on the guide pin.

[0091] In the embodiment of the present invention, if the thickness of the mold is within the adjustable mold range, that is, the minimum mold thickness ≤ the current mold thickness H 1 ≤maximum mold thickness, the relative position reading of the moving platen position electronic ruler is reset to zero, and the subsequent real-time relative position reading of the moving platen position electronic ruler = the real-time absolute value reading of the moving platen position electronic ruler + the minimum distance of the template L - the current mold thickness H 1 Automatically generate the current maximum mold opening stroke corresponding to the current mold thickness = template maximum distance - current mold thickness H 1 The current maximum mold opening stroke reading adopts the real-time relative position reading of the moving plate position electronic ruler. At the same time, the displacement adjustment amount of the piston of the clamping cylinder is calculated based on the mold thickness, the reference mold thickness and the tooth pitch of the annular teeth on the guide pin.

[0092] For example, the calculation formula of the displacement adjustment amount of the piston of the current clamping cylinder is as follows:

[0093]

[0094] in, The displacement adjustment of the piston of the clamping cylinder, is the thickness of the mold, is the base mold thickness, is the pitch of the annular teeth on the guide pin, Express The result is rounded.

[0095] If the thickness of the mold is not within the adjustable mold range, an alarm message of mold thickness exceeding the limit and mold adjustment failure will be issued, and mold adjustment failure will be displayed.

[0096] S103, calculating the expected position of the piston of the clamping cylinder based on the piston position, displacement adjustment amount and tooth pitch of the clamping cylinder corresponding to the reference mold thickness.

[0097] In the embodiment of the present invention, after calculating the displacement adjustment amount of the piston of the current clamping cylinder, the piston position S of the clamping cylinder corresponding to the reference mold thickness is 脱 +δ, displacement adjustment The desired position S of the piston of the clamping cylinder is calculated based on the tooth pitch P.

[0098] For example, in some embodiments of the present invention, the piston position S of the clamping cylinder corresponding to the reference mold thickness is 脱 +δ as the first position, and calculate the first position and displacement adjustment of , get the second position of the piston of the clamping cylinder, and calculate the sum of the first position and the tooth pitch P , and obtain the third position of the piston of the clamping cylinder. The desired position S of the piston of the clamping cylinder is determined based on the relationship between the first position, the second position and the third position.

[0099] Exemplarily, when the second position is greater than or equal to the first position and less than the third position, the second position is used as the desired position of the piston of the clamping cylinder. hour, ;

[0100] When the second position is greater than or equal to the third position, the difference between the second position and the tooth pitch is calculated as the expected position of the piston of the clamping cylinder. hour, ;

[0101] When the second position is smaller than the first position, the sum of the second position and the tooth distance is calculated as the desired position of the piston of the clamping cylinder. hour, .

[0102] After calculating the expected position of the piston of the clamping cylinder, the difference between the expected position and the tooth gap between the guide column and the brake assembly is calculated as the current maximum allowable demoulding position. The maximum demoulding position currently allowed The position reading adopts the relative position reading of the real-time moving template position electronic ruler.

[0103] S104, moving the piston of the clamping cylinder to a desired position, driving the brake assembly to move to the brake position, and then controlling the brake assembly to engage the brake.

[0104] In the embodiment of the present invention, the piston of the clamping cylinder is controlled to move to the desired position, driving the brake assembly to move to the brake position, and then controlling the brake assembly to brake. The deviation between the brake position calculated by the solution of the present invention and the actual position is controlled within ±0.5 , the brake has high precision. After the brake is in place, a prompt message indicating successful automatic mold adjustment will be issued.

[0105] The automatic mold adjustment method for a two-plate injection molding machine provided by the present invention comprises the following steps: after the mold is installed, the movable mold plate and the fixed mold plate are tightened, and the thickness of the mold is determined based on the reading of the movable mold plate position electronic ruler and the minimum distance between the mold plates; if the thickness of the mold is within the adjustable mold range, the displacement adjustment amount of the piston of the mold locking cylinder is calculated based on the thickness of the mold, the reference mold thickness and the tooth pitch of the annular teeth on the guide pin; the desired position of the piston of the mold locking cylinder is calculated based on the piston position of the mold locking cylinder corresponding to the reference mold thickness, the displacement adjustment amount and the tooth pitch; the piston of the mold locking cylinder is moved to the desired position, the brake assembly is driven to move to the brake position, and then the brake assembly is controlled to brake, so as to complete the mold adjustment, thereby improving the brake success rate and brake accuracy, avoiding the problems of high energy consumption and high noise caused by multiple blind clamping, improving the mold adjustment efficiency, reducing energy consumption and noise, avoiding the damage to the tooth surface of the brake assembly and the guide pin caused by multiple blind clamping, and improving the service life of the brake assembly and the guide pin.

[0106] Figure 3 A schematic diagram of the structure of an automatic mold adjustment device for a two-platen injection molding machine provided by the present invention, as shown in Figure 3 As shown, the automatic mold adjustment device of the two-platen injection molding machine includes:

[0107] The mold thickness determination module 201 is used to close the movable platen and the fixed platen after the mold is installed, and determine the thickness of the mold based on the reading of the movable platen position electronic ruler and the minimum distance between the templates;

[0108] The displacement adjustment amount calculation module 202 is used to calculate the displacement adjustment amount of the piston of the clamping cylinder based on the thickness of the mold, the reference mold thickness and the pitch of the annular teeth on the guide pin if the thickness of the mold is within the adjustable mold range;

[0109] An expected position calculation module 203, used to calculate an expected position of the piston of the clamping cylinder based on the piston position of the clamping cylinder corresponding to the reference mold thickness, the displacement adjustment amount and the tooth pitch;

[0110] The brake control module 204 is used to move the piston of the mold locking cylinder to the desired position, drive the brake assembly to move to the brake position, and then control the brake assembly to brake.

[0111] In some embodiments of the present invention, the automatic mold adjustment device for a two-platen injection molding machine further comprises:

[0112] The first maximum demoulding position calculation module is used to calculate the total stroke of the piston of the clamping cylinder and the safety distance of the piston of the clamping cylinder, the maximum stretching amount of the clamping mechanism under the maximum clamping force, and the difference between the tooth pitch of the annular teeth on the guide pin after the mold is installed and before the movable mold plate and the fixed mold plate are closed as the maximum demoulding position corresponding to the reference mold thickness;

[0113] A tooth gap calculation module is used to calculate the difference between the convex tooth width and the concave tooth width of the annular tooth on the guide post as the tooth gap between the guide post and the brake assembly after the brake is engaged;

[0114] The piston position calculation module of the clamping cylinder of the reference mold thickness is used to calculate the sum of the maximum demoulding position and the tooth gap as the piston position of the clamping cylinder corresponding to the reference mold thickness.

[0115] In some embodiments of the present invention, the automatic mold adjustment device for a two-platen injection molding machine further comprises:

[0116] A first distance determination module is used to determine, after the mold is installed and before the movable mold plate and the fixed mold plate are closed, the distance between the mold installation surface of the fixed mold plate and the center surface of the protruding tooth on the guide pin closest to the fixed mold plate as a first distance;

[0117] A piston moving module, used for moving the piston of the mold locking cylinder to a piston position of the mold locking cylinder corresponding to the reference mold thickness;

[0118] A movable platen driving module, used for moving the movable platen until the concave teeth on the brake assembly closest to the fixed platen are meshed with the convex teeth on the guide column closest to the fixed platen;

[0119] A second distance determination module is used to determine the distance from the mold installation surface of the movable platen to the center surface of the concave tooth on the brake assembly closest to the fixed platen as the second distance;

[0120] The reference mold thickness calculation module is used to calculate the difference between the first distance and the second distance to obtain a reference mold thickness.

[0121] In some embodiments of the present invention, the movable platen is molded to the bottom in a mold-free state until the absolute value reading of the movable platen position electronic ruler is zero and fixed, wherein the absolute value reading of the movable platen position electronic ruler is the real-time reading currently displayed by the movable platen position electronic ruler, and the reading of the movable platen position electronic ruler is reset to zero, and the mold thickness determination module 201 includes:

[0122] The movable platen determining submodule is used to drive the movable platen to move toward the fixed platen after the mold is installed;

[0123] A reading recording submodule is used for applying a preset driving force to the moving platen when it is detected that the absolute value reading of the moving platen position electronic ruler no longer changes, until the absolute value reading of the moving platen position electronic ruler no longer changes, and recording the current absolute value reading of the moving platen position electronic ruler;

[0124] The mold thickness calculation submodule is used to calculate the sum of the current absolute value reading of the electronic ruler of the moving template position and the minimum distance of the template to obtain the thickness of the mold.

[0125] In some embodiments of the present invention, the displacement adjustment amount of the piston of the clamping cylinder is calculated based on the thickness of the mold, the reference mold thickness and the pitch of the annular teeth on the guide pin, and the calculation formula is as follows:

[0126]

[0127] in, The displacement adjustment amount of the piston of the clamping cylinder, is the thickness of the mold, is the base mold thickness, is the pitch of the annular teeth on the guide pin, Express The result is rounded.

[0128] In some embodiments of the present invention, the expected position calculation module 203 includes:

[0129] a position calculation submodule, configured to take the piston position of the clamping cylinder corresponding to the reference mold thickness as the first position, calculate the sum of the first position and the displacement adjustment amount to obtain the second position of the piston of the clamping cylinder, and calculate the sum of the first position and the tooth pitch to obtain the third position of the piston of the clamping cylinder;

[0130] A first expected position calculation submodule, configured to use the second position as an expected position of the piston of the clamping cylinder when the second position is greater than or equal to the first position and less than the third position;

[0131] A second expected position calculation submodule, used for calculating the difference between the second position and the tooth pitch as the expected position of the piston of the clamping cylinder when the second position is greater than or equal to the third position;

[0132] The third expected position calculation submodule is used to calculate the sum of the second position and the tooth distance as the expected position of the piston of the clamping cylinder when the second position is smaller than the first position.

[0133] In some embodiments of the present invention, the automatic mold adjustment device for a two-platen injection molding machine further comprises:

[0134] The moving platen position electronic ruler zeroing module is used to reset the relative position reading of the moving platen position electronic ruler to zero if the thickness of the mold is within the adjustable mold range, wherein the relative position reading of the moving platen position electronic ruler = the real-time absolute value reading of the moving platen position electronic ruler + the minimum distance of the template - the current mold thickness;

[0135] A current maximum mold opening stroke calculation module is used to calculate the difference between the maximum distance between the movable platen and the fixed platen and the thickness of the mold as the current maximum mold opening stroke;

[0136] The current maximum allowable demoulding position calculation module is used to calculate the difference between the expected position and the tooth gap between the guide column and the brake assembly as the current maximum allowable demoulding position after calculating the expected position of the piston of the clamping cylinder.

[0137] In some embodiments of the present invention, the automatic mold adjustment device for a two-platen injection molding machine further comprises:

[0138] The alarm module is used to issue an alarm message of mold thickness exceeding the limit and mold adjustment failure if the thickness of the mold is not within the adjustable mold range.

[0139] The above-mentioned automatic mold adjustment device for a two-platen injection molding machine can execute the automatic mold adjustment method for a two-platen injection molding machine provided by the aforementioned embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the automatic mold adjustment method for a two-platen injection molding machine.

[0140] Figure 4 A schematic diagram of the structure of an electronic device provided by the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0141] like Figure 4 As shown, the electronic device includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. The input / output (I / O) interface 15 is also connected to the bus 14.

[0142] A number of components in the electronic device are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0143] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a two-plate injection molding machine automatic mold adjustment method.

[0144] In some embodiments, the automatic mold adjustment method for a two-plate injection molding machine can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on an electronic device via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the automatic mold adjustment method for a two-plate injection molding machine described above can be executed. Alternatively, in other embodiments, processor 11 can be configured to execute the automatic mold adjustment method for a two-plate injection molding machine by any other appropriate means (e.g., by means of firmware).

[0145] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0146] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0147] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0148] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0149] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0150] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0151] An embodiment of the present invention further provides a computer program product, including a computer program, which, when executed by a processor, implements the automatic mold adjustment method for a two-platen injection molding machine as provided in any embodiment of the present application.

[0152] In the process of implementation, the computer program product can be written in one or more programming languages ​​or a combination thereof to perform the computer program code of the present invention, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0153] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0154] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A two-platen injection molding machine automatic mold adjustment method, characterized in that: include: After the mold is installed, the movable mold plate and the fixed mold plate are closed, and the thickness of the mold is determined based on the reading of the movable mold plate position electronic ruler and the minimum distance between the mold plates; If the thickness of the mold is within the adjustable mold range, the displacement adjustment amount of the piston of the mold locking cylinder is calculated based on the thickness of the mold, the reference mold thickness and the pitch of the annular teeth on the guide pin; Calculating a desired position of the piston of the clamping cylinder based on the piston position of the clamping cylinder corresponding to the reference mold thickness, the displacement adjustment amount, and the tooth pitch; The piston of the clamping cylinder is moved to the desired position, driving the brake assembly to move to the brake position, and then controlling the brake assembly to engage the brake; The displacement adjustment amount of the piston of the clamping cylinder is calculated based on the thickness of the mold, the reference mold thickness and the tooth pitch of the annular teeth on the guide pin. The calculation formula is as follows: ； in, The displacement adjustment amount of the piston of the clamping cylinder, is the thickness of the mold, is the base mold thickness, is the pitch of the annular teeth on the guide pin, Express The result of rounding; Calculating the expected position of the piston of the clamping cylinder based on the piston position of the clamping cylinder corresponding to the reference mold thickness, the displacement adjustment amount, and the tooth pitch includes: The piston position of the clamping cylinder corresponding to the reference mold thickness is taken as the first position, and the sum of the first position and the displacement adjustment amount is calculated to obtain the second position of the piston of the clamping cylinder, and the sum of the first position and the tooth pitch is calculated to obtain the third position of the piston of the clamping cylinder; When the second position is greater than or equal to the first position and less than the third position, the second position is used as the expected position of the piston of the clamping cylinder; When the second position is greater than or equal to the third position, calculating the difference between the second position and the tooth pitch as the expected position of the piston of the clamping cylinder; When the second position is smaller than the first position, the sum of the second position and the tooth pitch is calculated as the expected position of the piston of the clamping cylinder.

2. The automatic mold adjustment method for a two-platen injection molding machine according to claim 1, characterized in that: After the mold is installed and before the movable and fixed molds are closed, it also includes: Calculate the difference between the total stroke of the piston of the clamping cylinder and the safe distance of the piston of the clamping cylinder, the maximum stretching amount of the clamping mechanism under the maximum clamping force, and the tooth pitch of the annular teeth on the guide pin as the maximum demoulding position corresponding to the reference mold thickness; Calculate the difference between the convex tooth width and the concave tooth width of the annular tooth on the guide post as the tooth gap between the guide post and the brake assembly after the brake is engaged; The sum of the maximum demoulding position and the tooth gap is calculated as the piston position of the clamping cylinder corresponding to the reference mold thickness.

3. The automatic mold adjustment method for a two-platen injection molding machine according to claim 2, characterized in that: After the mold is installed and before the movable and fixed molds are closed, it also includes: Determine the distance between the mold mounting surface of the fixed mold plate and the center surface of the protruding tooth on the guide pin closest to the fixed mold plate as the first distance; Moving the piston of the mold locking cylinder to the piston position of the mold locking cylinder corresponding to the reference mold thickness; Move the movable platen until the concave teeth on the brake assembly closest to the fixed platen are meshed with the convex teeth on the guide column closest to the fixed platen; Determine the distance from the mold mounting surface of the movable mold plate to the center surface of the concave tooth on the brake assembly closest to the fixed mold plate as the second distance; The difference between the first distance and the second distance is calculated to obtain a reference mold thickness.

4. The automatic mold adjustment method for a two-platen injection molding machine according to any one of claims 1 to 3, characterized in that: In the absence of a mold, the movable platen is closed to the bottom until the absolute value reading of the movable platen position electronic ruler is zero and fixed, wherein the absolute value reading of the movable platen position electronic ruler is the real-time reading currently displayed by the movable platen position electronic ruler. After the mold is installed, the movable platen and the fixed platen are closed, and the thickness of the mold is determined based on the reading of the movable platen position electronic ruler and the minimum distance between the templates, including: After the mold is installed, the movable mold plate is driven to move toward the fixed mold plate; When it is detected that the absolute value reading of the moving platen position electronic ruler no longer changes, a preset driving force is applied to the moving platen until the absolute value reading of the moving platen position electronic ruler no longer changes, and the current absolute value reading of the moving platen position electronic ruler is recorded; The sum of the current absolute value reading of the electronic ruler of the moving plate position and the minimum distance of the plate is calculated to obtain the thickness of the mold.

5. The automatic mold adjustment method for a two-platen injection molding machine according to any one of claims 1 to 3, characterized in that: Also includes: If the thickness of the mold is within the adjustable mold range, the relative position reading of the moving platen position electronic ruler is reset to zero, wherein the relative position reading of the moving platen position electronic ruler = the real-time absolute value reading of the moving platen position electronic ruler + the minimum distance of the template - the current mold thickness; Calculate the difference between the maximum distance between the movable platen and the fixed platen and the thickness of the mold as the current maximum mold opening stroke; After the expected position of the piston of the mold locking cylinder is calculated, the difference between the expected position and the tooth gap between the guide column and the brake assembly is calculated as the current maximum allowable demoulding position.

6. An automatic mold adjustment device for a two-platen injection molding machine, characterized in that: include: A mold thickness determination module is used to close the movable platen and the fixed platen after the mold is installed, and determine the thickness of the mold based on the reading of the movable platen position electronic ruler and the minimum distance between the templates; A displacement adjustment amount calculation module is used to calculate the displacement adjustment amount of the piston of the clamping cylinder based on the thickness of the mold, the reference mold thickness and the tooth pitch of the annular teeth on the guide pin if the thickness of the mold is within the adjustable mold range; An expected position calculation module, used for calculating an expected position of the piston of the clamping cylinder based on the piston position of the clamping cylinder corresponding to the reference mold thickness, the displacement adjustment amount and the tooth pitch; A brake control module is used to move the piston of the clamping cylinder to the desired position, drive the brake assembly to move to the brake position, and then control the brake assembly to brake; The displacement adjustment amount of the piston of the clamping cylinder is calculated based on the thickness of the mold, the reference mold thickness and the tooth pitch of the annular teeth on the guide pin, and the calculation formula is as follows: ； in, The displacement adjustment amount of the piston of the clamping cylinder, is the thickness of the mold, is the base mold thickness, is the pitch of the annular teeth on the guide pin, Express The result of rounding; The expected position calculation module includes: a position calculation submodule, configured to take the piston position of the clamping cylinder corresponding to the reference mold thickness as the first position, calculate the sum of the first position and the displacement adjustment amount to obtain the second position of the piston of the clamping cylinder, and calculate the sum of the first position and the tooth pitch to obtain the third position of the piston of the clamping cylinder; A first expected position calculation submodule, configured to use the second position as an expected position of the piston of the clamping cylinder when the second position is greater than or equal to the first position and less than the third position; A second expected position calculation submodule, used for calculating the difference between the second position and the tooth pitch as the expected position of the piston of the clamping cylinder when the second position is greater than or equal to the third position; The third expected position calculation submodule is used to calculate the sum of the second position and the tooth distance as the expected position of the piston of the clamping cylinder when the second position is smaller than the first position.

7. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the automatic mold adjustment method for a two-platen injection molding machine as described in any one of claims 1-5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the automatic mold adjustment method for a two-platen injection molding machine as described in any one of claims 1 to 5 is implemented.

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