A method for adjusting a mold based on an adjusting mold structure

Abstract

This invention relates to a novel mold adjustment structure, comprising a head plate, a second plate, a tail plate, and a tie rod. The tie rod passes sequentially through the tail plate and the second plate and connects to the head plate. A mold adjustment nut is mounted on the tie rod located on one side of the tail plate. The structure also includes a pull-out cylinder and a drive assembly. The pull-out cylinder connects the tail plate and the second plate. Multiple drive assemblies are configured, each adapted to one mold adjustment nut. This mold adjustment structure reduces the load on the mold adjustment nut during mold adjustment, allowing mold adjustment nuts made of cast iron to perform their function, thereby reducing production costs. This facilitates the promotion and application of the above-mentioned mold adjustment structure in die-casting machines or injection molding machines. A mold adjustment method also has the advantage of reducing production costs. A die-casting machine and an injection molding machine, respectively, utilize the above-mentioned novel mold adjustment structure, which also has the advantage of reducing production costs.

Description

Technical Field

[0001] This invention relates to the field of mechanical manufacturing equipment technology, specifically a mold adjustment method based on a mold adjustment structure. Background Technology

[0002] With the advancement of science and technology and industrial production, especially with the development of industries such as automobiles, motorcycles, and household appliances, die casting technology has achieved extremely rapid development. A die casting machine is a machine used for pressure casting, generally divided into hot-chamber and cold-chamber types; according to its chamber structure and arrangement, it can be further divided into vertical die casting machines and horizontal die casting machines. Under pressure, the die casting machine injects molten metal into a mold to cool and solidify. After the mold is opened, a solid metal casting is obtained. It was initially used for die casting lead type.

[0003] Die casting machines are commonly used in the machinery industry for die casting products. Traditional die casting machines mainly consist of six parts: mold clamping mechanism, injection mechanism, frame, hydraulic drive mechanism, electrical control mechanism, safety door and other safety protection mechanisms, among which the mold clamping mechanism and injection mechanism are the core components of the die casting machine.

[0004] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. They are classified as vertical, horizontal, and all-electric. Injection molding machines heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity.

[0005] When die-casting machines or injection molding machines are used with molds of different thicknesses, it is necessary to adjust the distance between the head plate mold surface and the second plate mold surface after mold closing in order to match the mold thickness and achieve the set clamping force.

[0006] When a die-casting machine or injection molding machine is loading a large mold, because the mold core-pulling cylinder is large, it is necessary to pull out one or two pull rods above it through the pull rod structure. This function is called pull rod pulling.

[0007] In the fields of die casting machines and injection molding machines, the commonly used mold adjustment method is to keep the head plate fixed at nut 15' and rotate the tail plate adjusting nut, causing the nut to drive the tail plate forward or backward relative to the tie rod, thereby adjusting the mold thickness. The four adjusting nuts are generally driven simultaneously by a central large gear ring, which is driven by a hydraulic or electric motor.

[0008] When adjusting molds in ultra-large die-casting machines or injection molding machines, the required adjusting force is enormous. To prevent the adjusting nut from seizing with the tie rod during mold adjustment and to facilitate lubrication, a copper alloy adjusting nut is required. However, this type of copper adjusting nut is very expensive, which is not conducive to cost control. The adjusting nut of a single tie rod cannot be adjusted individually, which leads to uneven distribution of the clamping force on the four tie rods or non-standard mold surface parallelism, making adjustment difficult and time-consuming. In ultra-large die-casting machines or injection molding machines, the traditional large gear ring structure for mold adjustment is extremely heavy, making assembly and maintenance difficult. Summary of the Invention

[0009] To overcome the shortcomings of the prior art, the first objective of this invention is to provide a mold adjustment structure that reduces the load on the mold adjustment nut during mold adjustment, allowing the cast iron mold adjustment nut to perform its function, thereby reducing production costs. Furthermore, it enables the adjustment and distribution of the clamping force of the four tie rods to meet the specific process requirements of different molds, offering wide adaptability and high utilization, which is beneficial for the promotion and application of this mold adjustment structure in die-casting machines or injection molding machines. The second objective of this invention is to provide a mold adjustment method based on the above-mentioned mold adjustment structure, which also has the advantages of reducing the load on the mold adjustment nut during mold adjustment, reducing mold adjustment costs, and facilitating mold adjustment. The third and fourth objectives of this invention are to provide a die-casting machine or an injection molding machine that respectively applies the above-mentioned mold adjustment structure, which also has the advantage of reducing production costs.

[0010] To achieve the first objective mentioned above, the present invention adopts the following technical solution: a mold adjustment structure, including a head plate, a second plate, a tail plate, and a pull rod, wherein the pull rod passes through the tail plate and the second plate in sequence and is connected to the head plate, and the pull rod located on one side of the tail plate is equipped with a mold adjustment nut; it also includes a rod-pulling cylinder and a drive assembly, wherein the rod-pulling cylinder is connected to the tail plate and the second plate, and the drive assembly is in multiple sets, each set of the drive assembly being adapted to one mold adjustment nut.

[0011] In a preferred embodiment of the present invention, the driving assembly includes a mold adjusting motor, each mold adjusting nut is equipped with a mold adjusting motor, the output end of the mold adjusting motor is loaded with motor teeth, and the motor teeth mesh with the mold adjusting nut.

[0012] In a preferred embodiment of the present invention, the driving assembly includes a mold adjusting motor, each mold adjusting nut is equipped with a mold adjusting motor, and a worm gear is installed at the output end of the mold adjusting motor, the worm gear meshing with the mold adjusting nut.

[0013] In a preferred embodiment of the present invention, the lever cylinder is installed above the tail plate and the second plate.

[0014] As a preferred embodiment of the present invention, an auxiliary mold adjusting cylinder is connected below the tail plate and the second plate.

[0015] As a preferred embodiment of the present invention, it further includes a cylinder-pulling assembly auxiliary component, which is connected to one end of the two pull rods near the cylinder-pulling cylinder.

[0016] As a preferred embodiment of the present invention, a frame is installed at the bottom of the mold adjustment structure, the head plate is fixedly installed on the frame, and the second plate and the tail plate are slidably installed on the frame.

[0017] As a preferred embodiment of the present invention, the adjusting screw nut is provided with an adjusting pressure cover.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The mold adjustment structure of the present invention is ingenious. By setting a pull bar cylinder, when it is necessary to adjust the mold thickness, the pull bar cylinder and the auxiliary mold adjustment cylinder apply pressure at the same time, jointly pushing the tail plate to overcome the mold adjustment resistance. At the same time, the drive component drives the mold adjustment screw nut to rotate, accurately controlling the position of the tail plate, thereby accurately adjusting the mold thickness.

[0019] Furthermore, by using an auxiliary mold-adjusting cylinder in conjunction with a pull-out cylinder, the rate at which most of the mold-adjusting resistance is eliminated can be increased, thereby improving the mold-adjusting speed and enhancing the user experience. The cost of using the auxiliary mold-adjusting cylinder is far lower than the cost of the copper material for the mold-adjusting screw nut.

[0020] Furthermore, the driving component in this invention includes a mold adjustment motor, and each mold adjustment nut is equipped with a mold adjustment motor, which can control the four tie rods respectively to complete the adjustment of the clamping force distribution of the four tie rods, so as to meet the special process requirements of different molds and expand the application range of the mold adjustment structure.

[0021] Furthermore, the tailplate in this invention can be divided into multiple modules to reduce the use of large components and facilitate operation and maintenance by operators.

[0022] Furthermore, in this invention, the threaded fit between the adjusting nut and the pull rod eliminates most of the adjusting resistance because the pull rod cylinder and the auxiliary adjusting cylinder can eliminate most of the adjusting resistance. Therefore, even if the adjusting nut is made of cast iron, there will be no seizing, thus reducing the cost of use.

[0023] To achieve the second objective mentioned above, the present invention adopts the following technical solution: a mold adjustment method: when it is necessary to adjust the mold thickness, the pull rod cylinder and the auxiliary mold adjustment cylinder apply pressure at the same time, jointly pushing the tail plate to overcome the mold adjustment resistance, and at the same time starting the mold adjustment motor to drive the mold adjustment screw nut to rotate, thereby controlling the position of the tail plate.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: Compared with the prior art of adjusting the mold by directly pushing the tail plate with the adjusting screw nut, the adjusting cylinder of the present invention can eliminate most of the adjusting resistance, greatly reducing the adjusting force required for the adjusting screw nut to push the tail plate. This reduces the load on the threaded fit between the adjusting screw nut and the tie rod, so that the adjusting screw nut can be made of cast iron without seizing, ensuring the service life of the adjusting screw nut while reducing the cost of use. At the same time, the reduction in adjusting load also means that the power required by the motor can be greatly reduced, so a small-power motor can be selected, reducing costs and improving reliability.

[0025] To achieve the third objective mentioned above, the present invention adopts the following technical solution: a die-casting machine that uses the aforementioned mold adjustment structure.

[0026] Compared with the prior art, the beneficial effects of the present invention are: the die casting machine of the present invention also has the advantages of improving the mold adjustment speed and reducing the operating cost.

[0027] To achieve the fourth objective mentioned above, the present invention adopts the following technical solution: an injection molding machine that uses the aforementioned mold adjustment structure.

[0028] Compared with the prior art, the beneficial effects of the present invention are: the injection molding machine of the present invention also has the advantages of improving the mold adjustment speed and reducing the operating cost. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a mold adjustment structure according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of a mold adjustment structure according to an embodiment of the present invention;

[0031] Figure 3 This is a structural front view of a mold-adjusting structure according to an embodiment of the present invention;

[0032] Figure 4 This is a side view of a mold-adjusting structure according to an embodiment of the present invention;

[0033] Figure 5 yes Figure 4 Cross-sectional view of the structure at point BB.

[0034] Reference numerals: 1. Drive assembly; 2. Worm gear; 3. Adjusting die nut; 4. Adjusting die cover; 5. Pull-out cylinder; 6. Pull-out assembly auxiliary component; 7. Auxiliary adjusting die cylinder; 8. Adjusting die motor; 9. Motor gear; 10. Tail plate; 11. Tie rod; 12. Second plate; 13. Head plate; 14. Frame; 15'. Head plate fixing nut; A. Die thickness. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0036] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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 limitations on this invention.

[0037] The present invention will now be described in detail with reference to the accompanying drawings.

[0038] Example 1: As Figures 1 to 5 As shown, a mold adjustment structure mainly consists of a head plate 13, a second plate 12, a tail plate 10, and pull rods 11. The pull rods 11 pass through the second plate 12 and the tail plate 10 and connect to the head plate 13. The mold is located between the head plate 13 and the second plate 12, and the distance between the head plate 13 and the second plate 12 can be adjusted according to the thickness A of the mold. The pull rods 11 are equipped with mold adjustment nuts 3, and a drive assembly 1 for adjusting the mold adjustment nuts 3 is installed on one side of the tail plate 10. The four pull rods 11 can independently adjust the position of the mold adjustment nuts 3, that is, each mold adjustment nut 3 is equipped with a set of drive assemblies 1, so that one drive assembly 1 drives one mold adjustment nut, improving the intelligence of the equipment and reducing the difficulty of assembly and maintenance. The mold adjustment nuts 3 and the pull rods 11 are threadedly engaged, that is, the pull rods 11 have a smooth section and a threaded section, so that they can pass through the second plate 12 and the tail plate 10 and engage with the mold adjustment nuts 3. The pull rod 11 is slidably fitted with the tail plate 10 and the second plate 12 by a guide sleeve, and is fixedly connected to the head plate 13 by screws or other fixing methods.

[0039] When adjusting the mold in a super-large die-casting machine or injection molding machine, the required adjustment force is huge. In order to prevent the adjustment nut 3 from engaging with the pull rod 11 during mold adjustment and to facilitate lubrication, the adjustment nut 3 made of copper alloy needs to be used. This copper adjustment nut 3 is very expensive and is not conducive to cost control.

[0040] In this embodiment, by reducing the load requirement on the adjusting screw nut 3 during mold adjustment, the adjusting screw nut 3 made of cast iron can also complete the work, thereby reducing production costs. Specifically, the mold adjustment mechanism in this embodiment is equipped with a pull rod cylinder 5, an auxiliary mold adjustment cylinder 7, and a mold adjustment motor 8. The pull rod cylinder 5 connects the second plate 12 and the tail plate 10. The output end of the mold adjustment motor 8 is equipped with motor teeth 9, which mesh with the adjusting screw nut 3. The gear meshing transmission method is used to achieve the advantages of high transmission efficiency and fast mold adjustment speed.

[0041] To prevent the adjusting screw nut 3 from moving in the axial or radial direction, an adjusting pressure cover 4 is provided on the outside of the adjusting screw nut 3.

[0042] The aforementioned pull-out cylinder 5 is installed above the aforementioned second platen 12 and the aforementioned tail platen 10, while the auxiliary mold-adjusting cylinder 7 is connected below the aforementioned second platen 12 and the aforementioned tail platen 10. When it is necessary to adjust the mold thickness, the pull-out cylinder 5 and the auxiliary mold-adjusting cylinder 7 work together to provide a hydraulic thrust of approximately equal magnitude to the static friction force between the second platen 12 and the tail platen 10. This thrust pushes the tail platen 10 to overcome the mold-adjusting resistance. Simultaneously, four mold-adjusting motors 8 are activated to drive four corresponding mold-adjusting nuts 3, causing the mold-adjusting nuts 3 to rotate and move the tail platen 10 forward or backward, thereby precisely controlling the position of the tail platen 10 and thus precisely adjusting the mold thickness A. Compared to the traditional method where the adjusting screw nut 3 directly pushes the tail plate 10 for adjusting the mold, the pull rod cylinder 5 and auxiliary adjusting cylinder 7 in this embodiment can eliminate most of the adjusting resistance, greatly reducing the adjusting force required for the adjusting screw nut 3 to push the tail plate 10. This reduces the load on the threaded fit between the adjusting screw nut 3 and the pull rod 11, so there will be no seizing even if the adjusting screw nut 3 is made of cast iron, ensuring the service life of the cast iron adjusting screw nut 3. The cost of the auxiliary adjusting cylinder 7 is much lower than the cost of the copper material of the adjusting screw nut 3, thus reducing the operating cost. At the same time, the reduction in the adjusting load also means that the power required by the adjusting motor 8 can be greatly reduced, so a low-power adjusting motor 8 can be selected, further reducing the operating cost and improving reliability.

[0043] To ensure the driving effect and the accuracy of the driving direction, the auxiliary mold adjustment cylinder 7 can be installed at the bottom center of the tail plate 10. At the same time, it can balance the movement of the lever pull cylinder 5 located above the tail plate 10. The lever pull cylinder 5 and the auxiliary mold adjustment cylinder 7 together push the tail plate 10 and the second plate 12 to move.

[0044] The lever cylinder 5 can be a single central cylinder or a double-sided lever cylinder.

[0045] The aforementioned lever assembly auxiliary component 6 can be fixed to one end of the two aforementioned pull rods 11 near the aforementioned lever cylinder 5 by screws.

[0046] A frame 14 is installed at the bottom of the mold-adjusting structure. The head plate 13 is fixedly mounted on the frame 14 with screws, meaning the position of the head plate 13 on the frame 14 is fixed. The second plate 12 and the tail plate 10 are slidably mounted on the frame 14 via guide rails or other means. Specifically, slide rails can be provided on the frame 14, and sliders or grooves can be installed on the bottom of the second plate 12 and the tail plate 10 to achieve slidable mounting of the second plate 12 and the tail plate 10 on the frame 14. This also reduces wear on the bottom of the second plate 12 and the tail plate 10, ensuring their service life and reducing operating costs.

[0047] Example 2: This example differs from Example 1 in that it includes a mold adjustment structure in which the drive component 1 comprises a mold adjustment motor 8. Each mold adjustment nut 3 is equipped with one mold adjustment motor 8, and a worm gear 2 is installed at the output end of the mold adjustment motor 8. The worm gear 2 meshes with the mold adjustment nut 3. Compared with gear transmission, the drive component 1 uses a worm gear mechanism, which has a larger transmission ratio and lower requirements for the power and precision of the mold adjustment motor 8, further ensuring the performance of the mold adjustment mechanism while reducing the cost of use.

[0048] Example 3: The difference between this example and Example 1 is that: in this example, a novel mold adjustment structure is provided only above the two plates 12 and the tail plate 10, with the pull rod cylinder 5 provided, without the auxiliary mold adjustment cylinder 7, and the mold adjustment function can still be achieved.

[0049] In the mold adjustment method of the mold adjustment structure in the above embodiments, when it is necessary to adjust the mold thickness, the pull rod cylinder 5 and the auxiliary mold adjustment cylinder 7 jointly apply pressure, providing a hydraulic thrust of approximately equal magnitude to the static friction force between the two plates 12 and the tail plate 10. This thrust jointly pushes the tail plate 10 to overcome the mold adjustment resistance. Simultaneously, the mold adjustment motors 8 are activated, causing the four mold adjustment nuts 3 to move separately, driving the tail plate 10 forward or backward to precisely control its position and thus accurately adjust the mold thickness A. This reduces costs by adding only the auxiliary mold adjustment cylinder while maintaining a largely unchanged overall structure (i.e., unchanged reliability). Furthermore, it can automatically adjust the clamping force distribution of the four pull rods 11 through software control to meet the special process requirements of different molds, improving production processability. It can also quickly adjust parallelism through software control, solving the technical problems of difficult, time-consuming, and low-precision traditional clamping force adjustments.

[0050] Specifically, the method for automatically adjusting the clamping force of the four tie rods 11 is as follows: Clamping force sensors are installed on each of the four tie rods 11.

[0051] The principle is to detect the elongation rate of the tie rod 11 and calculate the clamping force on each tie rod 11. If the difference in clamping force among the four tie rods 11 exceeds the set range, independent mold adjustment is required to readjust the clamping force distribution. The specific method is as follows: Based on the cross-sectional area and effective length of the tie rod 11, a preset mold adjustment amount and clamping force variation parameter table is set in the software. The system obtains the mold adjustment amount for each tie rod 11 by comparing the clamping force value on each tie rod 11 with the preset average clamping force difference, controls the corresponding mold adjustment motor 8 to complete the mold adjustment action, closes the mold again, and checks whether the clamping force of each tie rod 11 reaches the set range. If it meets the range, the process is complete; otherwise, the above action is repeated.

[0052] Parallelism adjustment method: After the precision error of the mold itself or the precision error caused by long-term use of the equipment, it is necessary to readjust the parallelism of the two mold surfaces, the second plate 12 and the head plate 13. Based on the mold trial performance, or after obtaining the parallelism error data by measuring the mold surface, the data is input into the software. The software obtains the mold adjustment amount of each tie rod 11 through the preset mold adjustment amount and the mold surface parallelism change parameter table, and controls the corresponding mold adjustment motor 8 to complete the mold adjustment action and complete the rapid parallelism adjustment.

[0053] The mold adjustment structure in the above embodiments can be applied to, but is not limited to, die casting machines or injection molding machines. Compared with the use of copper mold adjustment nuts in the prior art, it can greatly reduce the cost of use, while improving the mold adjustment speed and enhancing the user experience, which is conducive to the promotion and application of the above-mentioned die casting machines or injection molding machines in the market.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0055] Although this document frequently uses reference numerals from the accompanying drawings, such as 1. drive assembly; 2. worm gear; 3. mold adjusting nut; 4. mold adjusting cover; 5. pull rod cylinder; 6. pull rod assembly auxiliary component; 7. auxiliary mold adjusting cylinder; 8. mold adjusting motor; 9. motor gear; 10. tail plate; 11. tie rod; 12. second plate; 13. head plate; 14. frame; 15'. head plate fixing nut; A. mold thickness, etc., the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A method for adjusting a mold based on a mold-adjusting structure, characterized in that: The mold adjustment structure includes a head plate (13), a second plate (12), a tail plate (10), and a pull rod (11). The pull rod (11) passes through the tail plate (10) and the second plate (12) in sequence and connects to the head plate (13). The pull rod (11) located on one side of the tail plate (10) is equipped with a mold adjustment nut (3). It also includes a rod-pulling cylinder (5) and a drive assembly (1). The rod-pulling cylinder (5) connects the tail plate (10) and the second plate (12). The drive assembly (1) consists of multiple sets. The system includes a mold adjustment motor (8), and each mold adjustment nut (3) is equipped with a mold adjustment motor (8); the tail plate (10) and the lower part of the second plate (12) are connected to an auxiliary mold adjustment cylinder (7); when it is necessary to adjust the mold thickness, the pull rod cylinder (5) and the auxiliary mold adjustment cylinder (7) apply pressure at the same time, and push the tail plate (10) to overcome the mold adjustment resistance. At the same time, the mold adjustment motor (8) is started to drive the mold adjustment nut (3) to rotate, and control the position of the tail plate (10).

2. The method for adjusting a mold based on a mold-adjusting structure according to claim 1, characterized in that: The output end of the mold adjusting motor (8) is equipped with motor teeth (9), which mesh with the mold adjusting nut (3).

3. The method for adjusting a mold based on a mold-adjusting structure according to claim 1, characterized in that: The output end of the mold adjusting motor (8) is equipped with a worm gear (2), which meshes with the mold adjusting nut (3).

4. A method for adjusting a mold based on a mold-adjusting structure according to claim 2 or 3, characterized in that: The lever cylinder (5) is installed above the tail plate (10) and the second plate (12).

5. The method for adjusting a mold based on a mold-adjusting structure according to claim 1, characterized in that: The mold adjustment structure also includes a cylinder-pulling auxiliary component (6), which is connected to one end of the two pull rods (11) near the cylinder-pulling cylinder (5).

6. The method for adjusting a mold based on a mold-adjusting structure according to claim 5, characterized in that: A frame (14) is installed at the bottom of the mold adjustment structure. The head plate (13) is fixedly installed on the frame (14), and the second plate (12) and the tail plate (10) are slidably installed on the frame (14).

7. The method for adjusting a mold based on a mold-adjusting structure according to claim 1, characterized in that: The adjusting screw nut (3) is provided with an adjusting pressure cover (4).

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