Centering device for center of injection molding machine template with turntable and centering method thereof

Abstract

The invention discloses a centering device and a centering method for the center of a template of an injection molding machine with a turntable, and the centering device comprises a movable template side center ring assembly, a displacement measurement device, a fixed template side adjustable center ring assembly and a laser detection assembly, the movable template side center ring assembly and the turntable on the movable template side of the injection molding machine are coaxially arranged; the central axis of the movable mold plate side central ring assembly coincides with the central axis of the rotating shaft. The fixed mold plate side adjustable center ring assembly is arranged in the center of a fixed mold plate of the injection molding machine and is used for compensating the center deviation between a turntable on the movable mold plate side and the fixed mold plate; the laser detection assembly comprises a laser emitting assembly and a laser receiving assembly and is used for detecting the center deviation between the movable mold plate turntable and the fixed mold plate in the mold closing process of the movable mold plate turntable and the fixed mold plate; and the fixed mold plate side center ring assembly is adjusted according to the center deviation so as to achieve centering of the centers of the movable mold plate and the fixed mold plate. The technical problems that in the prior art, an injection molding machine template is low in centering operation efficiency and depends on manual experience are solved.

Description

Technical Field

[0001] This invention relates to the field of injection molding machine template adjustment and centering, and in particular to a centering device and method for the centering of injection molding machine templates with turntables. Background Technology

[0002] In large-scale precision multi-color injection molding production, the moving mold portion is typically mounted on a rotating platform of the moving platen, while the fixed mold portion is mounted on the fixed platen. The center holes of the moving platen rotating platform and the fixed platen must be precisely aligned to ensure mold closing accuracy, reduce mold wear, and prevent flash on the product. Traditionally, manual alignment is achieved using a mechanical dial indicator and feeler gauge. This method relies heavily on the operator's skill level and experience, leading to significant differences between operators and making it difficult to guarantee consistent high precision. Furthermore, this method is inefficient, with cumbersome adjustment steps requiring repeated measurement, adjustment, tightening, and verification, resulting in long processing times and low equipment debugging efficiency. More seriously, traditional measurement methods struggle to achieve dynamic and real-time detection; dial indicator measurements are static and discrete, unable to reflect changes in center deviation in real-time and continuously during adjustment. Summary of the Invention

[0003] In view of this, the purpose of this invention is to provide a centering device and method for the centering of the injection molding machine template with a turntable, so as to solve the technical problems of low centering accuracy, low operating efficiency and reliance on manual experience in the prior art.

[0004] To achieve the above objectives, the present invention provides a centering device for the center of an injection molding machine template with a turntable, comprising a moving template side center ring assembly, a fixed template side adjustable center ring assembly, a laser detection assembly, and a displacement measuring device. The moving template side center ring assembly is coaxially arranged with the turntable on the moving template side of the injection molding machine. The moving template side center ring assembly includes a first outer ring and a first inner ring. The first outer ring is positionally adjustable relative to the moving template turntable. The first inner ring is coaxially arranged with and fixedly connected to the first outer ring, forming a concentric combined ring structure. The displacement measuring device includes a balance ruler and a dial indicator. The balance ruler supports and fixes the dial indicator and can be mounted on a Green column or equivalent support on the moving template side of the injection molding machine. The dial indicator is mounted on the balance ruler, and its probe contacts the first inner ring. The displacement measuring device is used for... The radial runout of the center hole of the first inner ring is detected when the moving platen turntable rotates; the moving platen-side center ring assembly is adjusted according to the radial runout to make the center hole of the moving platen-side center ring assembly concentric with the rotation axis of the moving platen-side turntable, and the moving platen-side center ring assembly is fixed after adjustment; the fixed platen-side adjustable center ring assembly is set at the center position of the fixed platen of the injection molding machine to compensate for the center deviation between the turntable and the fixed platen on the moving platen side; the laser detection assembly includes a laser emitting assembly and a laser receiving assembly, the laser emitting assembly is set at the center position of the moving platen side, the laser receiving assembly is set at the center position of the fixed platen side, and the laser detection assembly is used to detect the center deviation between the moving platen and the fixed platen during the mold closing process; the fixed platen-side adjustable center ring assembly is adjusted according to the center deviation to achieve the center alignment of the moving platen and the fixed platen.

[0005] Based on the above embodiments, the outer peripheral surface of the first inner ring and the inner peripheral surface of the first outer ring are tightly fitted.

[0006] Based on the above embodiments, the inner ring is provided with a central hole, which is used to install the mold.

[0007] Based on the above embodiments, the adjustable center ring assembly on the fixed template side includes a second inner ring and a second outer ring. The center hole of the second outer ring is provided with a first eccentricity relative to the center of the fixed template side, and the center hole of the second inner ring is provided with a second eccentricity relative to the center hole of the second outer ring. The first eccentricity and the second eccentricity are in opposite directions.

[0008] Based on the above embodiments, at least one of the second inner ring and the second outer ring can rotate relative to the fixed template about its central axis, so that the central hole of the fixed template side eccentric central ring assembly produces a continuously adjustable position change in the plane, so as to achieve fine adjustment of the center deviation.

[0009] Based on the above embodiments, the laser emitting component is mounted on the moving template side center ring component by a clamp, and the central axis of the moving template side center ring component is used as the laser emitting reference axis.

[0010] Based on the above embodiments, the laser receiving component is mounted on the adjustable center ring component on the fixed template side by a clamp and is coaxially positioned with the center hole of the adjustable center ring component on the fixed template side.

[0011] Based on the above embodiments, the laser detection component detects the center deviation between the moving template and the fixed template when the injection molding machine is in the mold closing state.

[0012] Based on the above embodiments, the adjustable center ring assembly on the fixed template side is adjusted according to the center deviation, so that the center deviation between the moving template and the fixed template is adjusted to a preset range.

[0013] A method for centering the mold plate of an injection molding machine, which utilizes the aforementioned centering device, includes the following steps: S1. Use a displacement measuring device to measure the radial runout between the moving template turntable and the center hole of the first inner ring when the turntable rotates; The center ring assembly on the moving template side and the turntable are aligned according to the radial runout. After alignment, the center ring assembly on the moving template side is fixed to form a stable center reference on the moving template turntable side. S2. Install the adjustable center ring assembly on the fixed template side, so that the adjustable center ring assembly on the fixed template side is in the initial installation state; S3. Install the laser emitting component at the center of the rotating disk on the moving template side, and use the central axis of the moving template side center ring component as the laser emitting reference axis. Install the laser receiving component at the center of the fixed template side, and position the laser receiving component coaxially with the center hole of the fixed template side adjustable center ring component. S4. Control the injection molding machine to close the mold. During the mold closing process, the center deviation between the moving mold plate and the fixed mold plate is detected by the laser detection component. S5. Adjust the adjustable center ring assembly on the fixed template side according to the center deviation to compensate for the center deviation to the preset range, so as to achieve the center alignment between the moving template and the fixed template.

[0014] Based on the above embodiments, in step S4, the center deviation is characterized by the optical axis offset between the laser emitting component and the laser receiving component.

[0015] Based on the above embodiments, in step S5, by rotating the inner ring and / or outer ring of the adjustable center ring assembly on the fixed template side around its central axis, the center position of the adjustable center ring assembly on the fixed template side generates a continuously adjustable displacement in the plane.

[0016] Based on the above embodiments, steps S4 and S5 are executed alternately until the center deviation between the moving template and the fixed template is adjusted to within the preset accuracy range.

[0017] Compared with existing technologies, this invention has beneficial effects. By establishing a central ring assembly on the moving template side, this invention enables the moving template to form a stable and reliable central reference during the installation stage, avoiding the problem of continuous accumulation of center errors on the moving template side during subsequent assembly and operation. By employing an eccentric central ring structure on the fixed template side with preset eccentricity between inner and outer ring center holes that can rotate relative to each other, this invention transforms the traditional translational adjustment method, which relies on shims or repeated disassembly and reassembly, into an angular rotational adjustment method. This achieves continuous, quantitative, and fine adjustment of the center position in the plane, improving the controllability and adjustment accuracy of center alignment. Furthermore, by introducing laser detection into the template center alignment process and performing detection while the injection molding machine is in the mold-closed state, the measurement results of the center deviation can accurately reflect the actual working state of the equipment. Combined with compensation adjustment using the eccentric central ring assembly on the fixed template side, this forms an alignment process based on feedback from the detection results, reducing reliance on manual experience. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the moving template side center ring assembly according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the adjustable center ring assembly on the fixed template side according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the displacement measuring device according to an embodiment of the present invention.

[0022] Figure Labels The moving mold side center ring assembly 10, the first inner ring 11, the first outer ring 12, the fixed mold side adjustable center ring assembly 20, the second inner ring 21, the second outer ring 22, the laser detection assembly 30, the laser emitting assembly 31, the laser receiving assembly 32, the displacement measuring device 40, the balance ruler 41, and the dial indicator 42. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0025] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or end that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or ends.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] A centering device for the center of an injection molding machine mold platen with a turntable includes a moving mold platen side center ring assembly 10, a fixed mold platen side adjustable center ring assembly 20, and a laser detection assembly 30. The moving mold platen side center ring assembly 10 is coaxially arranged with the turntable on the moving mold platen side of the injection molding machine. The moving mold platen side center ring assembly 10 includes a first outer ring 12 and a first inner ring 11. The first outer ring 12 is positionally adjustable relative to the moving mold platen turntable. The first inner ring 11 is coaxially arranged with and fixedly connected to the first outer ring 12, forming a concentric combined ring structure. A displacement measuring device 40 includes a balance ruler 41 and a dial indicator 42. The balance ruler 41 supports and fixes the dial indicator 42 and can be installed on a Green column or equivalent support on the moving mold platen side of the injection molding machine. The dial indicator 42 is mounted on the balance ruler 41, and its probe contacts the first inner ring 11. The 0 is used to detect the radial runout of the center hole of the first inner ring 11 when the moving platen turntable rotates; the moving platen side center ring assembly 10 is adjusted according to the radial runout to make the center hole of the moving platen side center ring assembly 10 concentric with the rotation axis of the moving platen side turntable, and the moving platen side center ring assembly 10 is fixed after adjustment; the fixed platen side adjustable center ring assembly 20 is set at the center position of the fixed platen of the injection molding machine to compensate for the center deviation between the turntable on the moving platen side and the fixed platen; the laser detection assembly 30 includes a laser emitting assembly 31 and a laser receiving assembly 32. The laser emitting assembly 31 is set at the center position on the moving platen side, and the laser receiving assembly 32 is set at the center position on the fixed platen side. The laser detection assembly 30 is used to detect the center deviation between the moving platen and the fixed platen during the mold closing process; the fixed platen side center ring assembly 20 is adjusted according to the center deviation to achieve the center alignment between the moving platen and the fixed platen.

[0029] The moving template side center ring assembly 10 is installed at the bearing position of the moving template turntable. The first outer ring 12 is used for concentric adjustment with the turntable's axis of rotation, and the center hole of the first inner ring 11 is used to mate with the boss on the back of the moving mold side. The first inner ring 11 and the first outer ring 12 are coaxially fixedly connected, forming a concentric combined ring structure. The first inner ring 11 is provided with a center hole.

[0030] Specifically, during installation, the displacement measuring device 40 includes a balance scale 41 and a dial indicator 42 mounted on the balance scale 41. The balance scale 41 is positioned on a Green column or equivalent support on the moving template side, ensuring that the dial indicator 42 maintains a stable position reference during self-alignment. The probe of the dial indicator 42 contacts the first inner ring 11. When the rotating disk on the moving template side rotates around its axis, if the center hole of the first inner ring 11 is not concentric with the axis, the dial indicator probe will generate a radial displacement change. This displacement change allows the radial runout of the center hole of the first inner ring relative to the rotating disk axis to be obtained.

[0031] By measuring the radial runout, the position of the first outer ring 12 is adjusted accordingly, thereby achieving centering of the moving template side center ring assembly 10 and the rotating shaft.

[0032] The adjustable center ring assembly 20 on the fixed template side is installed at the center of the fixed template and is used to compensate for the center deviation between the moving template and the fixed template during the alignment process.

[0033] The laser detection assembly 30 includes a laser emitting assembly 31 positioned at the center of the moving mold plate and a laser receiving assembly 32 positioned at the center of the fixed mold plate. The laser emitting assembly 31 emits a laser beam with the central reference axis formed by the central ring assembly 10 on the moving mold plate side as the emission reference axis. During the injection molding process, the laser beam propagates along the center direction of the moving and fixed mold plates and is received by the laser receiving assembly 32. The positional change of the laser beam on the laser receiving assembly 32 reflects the center deviation between the moving and fixed mold plates.

[0034] After detecting the center deviation, the adjustable center ring assembly 20 on the fixed template side is adjusted to change its center position accordingly, thereby compensating for the center deviation between the moving template and the fixed template, and finally achieving the centering of the two templates.

[0035] Furthermore, the outer circumferential surface of the first inner ring 11 and the inner circumferential surface of the first outer ring 12 are tightly fitted, and the central hole of the first inner ring 11 always maintains a strict coaxial relationship with the first outer ring 12, thereby ensuring that the central reference established by adjusting the first outer ring 12 can be completely and accurately transmitted to the central hole of the first inner ring 11.

[0036] Furthermore, the first inner ring 11 is provided with a central hole, and the moving template side mold is installed on the central hole.

[0037] Furthermore, the adjustable center ring assembly 20 on the fixed template side includes a second inner ring 21 and a second outer ring 22. The center hole of the second outer ring 22 is provided with a first eccentricity relative to the center of the fixed template side, and the center hole of the second inner ring 21 is provided with a second eccentricity relative to the center hole of the second outer ring 22. The first eccentricity and the second eccentricity are opposite in direction.

[0038] Furthermore, at least one of the second inner ring 21 and the second outer ring 22 is rotatable relative to the fixed template about its central axis, so that the central hole of the adjustable central ring assembly 20 on the fixed template side produces a continuously adjustable position change in the plane, so as to achieve fine adjustment of the center deviation.

[0039] Specifically, after assembly, at least one of the second inner ring 21 and the second outer ring 22 can rotate relative to the fixed template around its own central axis. During rotation, due to the opposite directions of the two eccentricities, the superposition effect of the center holes of the second inner ring 21 and the second outer ring 22 causes the final position of the center hole to change within the plane of the fixed template. The position of the center hole can be continuously changed within the plane, thereby allowing adjustment of the center position without disassembling the components.

[0040] During template centering, based on the center deviation results obtained by the laser detection component 30, the second inner ring 21 or the second outer ring 22 is rotated and adjusted so that the center hole on the fixed template side gradually moves closer to the center reference on the moving template side until the center deviation is controlled within a preset range. After adjustment, the second inner ring 21 and the second outer ring 22 are fixed by a fastening structure to maintain the adjusted center position.

[0041] Furthermore, the laser emitting component 31 is mounted on the moving template side center ring component 10 by a clamp, and the central axis of the moving template side center ring component 10 is used as the laser emitting reference axis.

[0042] Furthermore, the laser receiving component 32 is mounted on the adjustable center ring component 20 on the fixed template side by a clamp and is coaxially positioned with the center hole of the adjustable center ring component 20 on the fixed template side.

[0043] Furthermore, the laser detection component 30 detects the center deviation between the moving platen and the fixed platen when the injection molding machine is in the mold closing state.

[0044] Furthermore, the adjustable center ring assembly 20 on the fixed template side is adjusted according to the center deviation, so that the center deviation between the moving template and the fixed template is adjusted to a preset range.

[0045] Specifically, the laser emitting component 31 is installed on the central ring component 10 on the moving template side by a clamp. The clamp and the central ring component 10 are coaxially engaged, so that after the laser emitting component 31 is installed, the central axis formed by the central ring component 10 on the moving template side is used as the laser emission reference axis.

[0046] The laser receiving component 32 is mounted on the adjustable center ring component 20 on the fixed template side using a clamp. The clamp is coaxially positioned with the center hole of the adjustable center ring component 20 on the fixed template side, ensuring that the receiving center of the laser receiving component 32 is consistent with the center position of the fixed template side. The laser receiving component 32 forms a fixed receiving reference on the fixed template side, which is used to accurately reflect the positional deviation of the laser beam relative to the center of the fixed template.

[0047] During the alignment process, the injection molding machine is in the mold-closed state, with the moving platen and the fixed platen relatively close together in their actual working positions. The laser beam emitted by the laser emitting component 31 propagates along the center reference of the moving platen side and is projected onto the fixed platen side, where it is received by the laser receiving component 32. The offset of the laser beam on the laser receiving component 32 reflects the center deviation between the moving platen and the fixed platen.

[0048] Based on the detected center deviation, the adjustable center ring assembly 20 on the fixed template side is adjusted to change the position of its center hole in the plane, thereby driving the position adjustment of the laser receiving assembly 32, so that the laser beam gradually approaches the receiving center position. When the laser beam falls into the preset range, the center alignment between the moving template and the fixed template is completed, and the adjustable center ring assembly 20 on the fixed template side is fixed.

[0049] A method for centering the mold plate of an injection molding machine, which utilizes the aforementioned centering device, includes the following steps: S1. Use displacement measuring device 40 to measure the radial runout between the moving template turntable and the center hole of the first inner ring when the turntable rotates. The center ring assembly on the moving template side and the turntable are aligned according to the radial runout. After alignment, the center ring assembly on the moving template side is fixed to form a stable center reference on the moving template turntable side. S2. Install the adjustable center ring assembly on the fixed template side, so that the adjustable center ring assembly on the fixed template side is in the initial installation state; S3. Install the laser emitting component at the center of the rotating disk on the moving template side, and use the central axis of the moving template side center ring component as the laser emitting reference axis. Install the laser receiving component at the center of the fixed template side, and position the laser receiving component coaxially with the center hole of the fixed template side adjustable center ring component. S4. Control the injection molding machine to close the mold. During the mold closing process, the center deviation between the moving mold plate and the fixed mold plate is detected by the laser detection component. S5. Adjust the adjustable center ring assembly on the fixed template side according to the center deviation to compensate for the center deviation to the preset range, so as to achieve the center alignment between the moving template and the fixed template.

[0050] Furthermore, in step S4, the center deviation is characterized by the optical axis offset between the laser emitting component 31 and the laser receiving component 32.

[0051] Furthermore, in step S5, by rotating the second inner ring and / or the second outer ring in the fixed template side adjustable center ring assembly 20 around its central axis, the center position of the fixed template side adjustable center ring assembly 20 is continuously adjustable in the plane.

[0052] Furthermore, steps S4 and S5 are executed alternately until the center deviation between the moving template and the fixed template is adjusted to within the preset range.

[0053] Example 1: The centering device for the center of the injection molding machine template with turntable in this example is installed on the injection molding machine. It includes a center ring assembly 10 on the moving template side, an adjustable center ring assembly 20 on the fixed template side, and a laser detection assembly 30. The components cooperate with each other to complete the centering between the moving template and the fixed template under the actual mold closing conditions of the injection molding machine.

[0054] The moving template side center ring assembly 10 is mounted on the rotating shaft of the moving template turntable. The first outer ring 12 is used for concentric adjustment with the rotating shaft of the turntable, and the center hole of the first inner ring 11 is used to install the moving template side mold. The first inner ring 11 and the first outer ring 12 are coaxially fixedly connected, forming a combined ring structure with inner and outer concentricity.

[0055] First, the moving template side center ring assembly 10 is aligned during the installation phase. During alignment, the moving template side center ring assembly 10 is first installed at the center of the moving template turntable, and the fasteners between the first outer ring 12 and the moving template turntable are loosened, making the first outer ring 12 adjustable. By inserting feeler gauges of different thicknesses between the first outer ring 12 and the turntable mounting hole, the gaps of the first outer ring 12 in the vertical and horizontal directions are adjusted, so that the first outer ring 12 is initially concentric with respect to the turntable axis. Then, the fasteners of the first outer ring 12 are temporarily tightened.

[0056] After initial adjustment, place the balance ruler 41 on the smooth surface of the two Green columns, and install a dial indicator 42 on the balance ruler 41, making the probe of the dial indicator 42 contact the bottom of the center hole of the first inner ring 11 and zero it. Then drive the moving template turntable to rotate 180 degrees around the axis (in this embodiment, the rotation angle is 180 degrees, but different angles can be adjusted according to actual production needs). Observe the change in the dial indicator 42 reading to obtain the radial runout of the center hole of the first inner ring 11 relative to the axis. When the measured radial runout exceeds the preset allowable value (set according to actual needs), loosen the screw of the first outer ring 12 again, and make minor adjustments by using feeler gauges in the lower and lateral positions to reduce the radial deviation. After adjustment, retighten the screw of the first outer ring 12 and repeat the measurement until the radial runout is controlled within the allowable range (set according to actual needs). The screws of the first outer ring 12 are finally tightened, and a positioning pin is driven between the first outer ring 12 and the moving template turntable, so that the center ring assembly 10 on the moving template side is permanently fixed in the current self-aligning position, thereby forming a stable center reference on the moving template side.

[0057] During the manufacturing and assembly of the moving template side center ring assembly 10, the outer circumferential surface of the first inner ring 11 and the inner circumferential surface of the first outer ring 12 are connected by a tight fit. Through the design of a predetermined interference fit and the press-fit process, the first inner ring 11 and the first outer ring 12 form a stable integrated structure after assembly, and there is no relative rotation or radial movement between them, thereby ensuring that the center hole of the first inner ring 11 always maintains a strict coaxial relationship with the first outer ring 12 under any working condition.

[0058] Then, the adjustable center ring assembly 20 on the fixed template side is installed at the center of the fixed template. The adjustable center ring assembly 20 includes a second outer ring 22 and a second inner ring 21. The second outer ring 22 is installed in the center mounting area of ​​the fixed template, and the center hole of the second outer ring 22 is provided with a first eccentricity relative to the center of the fixed template. The second outer ring 22 is sleeved on the second inner ring 21, and the center hole of the second inner ring 21 is provided with a second eccentricity relative to the center hole of the second outer ring 22, and the direction of the second eccentricity is opposite to the direction of the first eccentricity. Through this superimposed design of double eccentric structure, the center hole on the fixed template side has a large adjustable range in the plane.

[0059] For example, the center hole of the second outer ring 22 is offset to the right by a certain distance (e.g., 3mm) relative to its mounting reference surface, and the center hole of the second inner ring 21 is offset to the left by the same distance (e.g., 3mm) relative to the center hole of the second outer ring 22. By rotating the second inner ring 21 and the second outer ring 22, continuous position adjustments of the center hole in any direction in the plane can be achieved.

[0060] After assembly, at least one of the second inner ring 21 and the second outer ring 22 can rotate relative to the fixed template around its own central axis. As the relative angle between the second inner ring 21 and the second outer ring 22 changes, the two eccentricities in opposite directions are superimposed in the plane, causing the position of the final central hole to change continuously within the plane of the fixed template. By rotating either the second inner ring 21 or the second outer ring 22, or by rotating both in combination, the central hole can be adjusted in any direction without disassembling the assembly.

[0061] The laser detection assembly 30 includes a laser emitting assembly 31 and a laser receiving assembly 32. The laser emitting assembly 31 is mounted on the moving template side center ring assembly 10 using a clamp. The clamp is coaxially fitted with the moving template side center ring assembly 10, ensuring that the laser emitting assembly 31, after installation, uses the central axis formed by the moving template side center ring assembly 10 as the laser emission reference axis. The laser receiving assembly 32 is mounted on the fixed template side adjustable center ring assembly 20 using a clamp. The clamp is coaxially positioned with the center hole of the fixed template side adjustable center ring assembly 20, ensuring that the receiving center of the laser receiving assembly 32 is consistent with the current center position of the fixed template side.

[0062] During the alignment process, the center ring assembly 10 on the moving mold plate side is first aligned and fixed to form a stable center reference on the moving mold plate side. Then, the adjustable center ring assembly 20 on the fixed mold plate side is installed, and the laser emitting assembly 31 and the laser receiving assembly 32 are respectively installed at the center positions of the moving and fixed mold plate sides. After installation, the injection molding machine is controlled to close the mold, allowing the moving and fixed mold plates to come into relative contact under actual working conditions.

[0063] In the mold-closed state, the laser emitting component 31 emits a laser beam along the central reference axis of the moving template side. The laser beam propagates along the central direction of the moving template and the fixed template and is projected onto the fixed template side, where it is received by the laser receiving component 32. The positional offset of the laser beam on the laser receiving component 32 reflects the center deviation between the moving template and the fixed template, and this deviation is characterized by the offset of the laser optical axis relative to the receiving center.

[0064] Based on the detected center deviation, the adjustable center ring assembly 20 on the fixed template side is adjusted. By rotating at least one of the second inner ring 21 and the second outer ring 22, the center hole on the fixed template side is displaced in the plane, thereby causing a change in the position of the laser receiving assembly 32. As the adjustment process proceeds, the laser beam gradually moves closer to the receiving center of the laser receiving assembly 32. When the offset of the laser beam falls within a preset range, the center alignment between the moving template and the fixed template is completed. Subsequently, the second inner ring 21 and the second outer ring 22 are fixed by a fastening structure to maintain the adjusted center position.

[0065] In practical applications, through repeated testing and adjustment, the center deviation between the moving template and the fixed template can be controlled within a high precision range (the preset range in this embodiment is within 0.01mm) under mold closing conditions, thereby meeting the requirements of high-precision injection molding for template center consistency.

[0066] By employing an eccentric center ring structure with preset eccentricities in the inner and outer ring center holes on the fixed template side, allowing for relative rotation, the traditional translational center adjustment method, which relies on shims or multiple disassemblies, is transformed into a center position adjustment method based on angular rotation. Because the inner and outer ring eccentricities are in opposite directions, the center hole generates a predictable and continuously changing composite displacement in the plane when they rotate relative to each other, enabling fine adjustment of the center hole in any direction. This structure provides a large degree of adjustment freedom and high adjustment resolution within a limited installation space, significantly improving the accuracy and controllability of template center adjustment and reducing the difficulty of repeated manual adjustments.

[0067] A method for centering the mold plate of an injection molding machine, which utilizes the aforementioned centering device, includes the following steps: S1. Use displacement measuring device 40 to measure the radial runout between the moving template turntable and the center hole of the first inner ring when the turntable rotates. The center ring assembly on the moving template side and the turntable are aligned according to the radial runout. After alignment, the center ring assembly on the moving template side is fixed to form a stable center reference on the moving template turntable side. S2. Install the adjustable center ring assembly 20 on the fixed template side, so that the adjustable center ring assembly 20 on the fixed template side is in the initial installation state; S3. Install the laser emitting component 31 at the center of the rotating disk on the moving template side, and use the central axis of the moving template side center ring component 10 as the laser emitting reference axis. Install the laser receiving component 32 at the center of the fixed template side, and position the laser receiving component 32 coaxially with the center hole of the fixed template side adjustable center ring component 20. S4. Control the injection molding machine to close the mold. During the mold closing process, the center deviation between the moving mold plate and the fixed mold plate is detected by the laser detection component 30. S5. Adjust the adjustable center ring assembly on the fixed template side according to the center deviation to compensate for the center deviation to the preset range, so as to achieve the center alignment between the moving template and the fixed template.

[0068] Furthermore, in step S4, the center deviation is characterized by the optical axis offset between the laser emitting component 31 and the laser receiving component 32.

[0069] Further, in step S5, by rotating the second inner ring 21 and / or the second outer ring 22 in the fixed template side adjustable center ring assembly 20 around its central axis, the center position of the fixed template side adjustable center ring assembly 20 is continuously adjustable in the plane.

[0070] Furthermore, steps S4 and S5 are executed alternately until the center deviation between the moving template and the fixed template is adjusted to within the preset accuracy range.

[0071] Specifically, the injection molding machine is controlled to close the mold during the central adjustment process, and the closing force is controlled within a predetermined proportion of the maximum closing force (set to one-third of the mold closing force in this embodiment). This allows the four guide pillars of equal height to guide the moving and fixed mold plates under this condition, thereby ensuring the parallelism of the mold plates during the closing process. Subsequently, the laser detection component 30 is activated, and the laser emitting component 31 emits a laser beam along the center reference of the moving mold plate side. The laser beam is projected onto the fixed mold plate side and received by the laser receiving component 32. The offset of the laser beam on the laser receiving component 32 directly reflects the actual deviation between the center of the moving mold plate side and the center of the fixed mold plate side.

[0072] In the initial testing phase, the horizontal and vertical adjustment mechanisms on the laser emitting assembly 31 are adjusted to align the laser spot with the receiving center of the laser receiving assembly 32. The adjustment amount is recorded, corresponding to the center deviation between the moving and stationary templates. Subsequently, based on the recorded center deviation, the eccentric center ring assembly 20 on the stationary template side is adjusted. By rotating the second inner ring 21 and the second outer ring 22 within the eccentric center ring assembly, the center position on the stationary template side undergoes a displacement in the plane corresponding to the direction and amplitude of the deviation, thereby compensating for the center deviation.

[0073] After one adjustment, the laser detection component is activated again to detect the center deviation. Based on the new detection results, the eccentric center ring assembly 20 on the fixed template side is further corrected. Through repeated alternation of detection and adjustment, the center deviation between the moving template and the fixed template is gradually reduced until it reaches the preset range requirement. After the center deviation meets the accuracy requirements, the fastening structure of the eccentric center ring assembly 20 on the fixed template side is locked and fixed with locating pins, so that the adjusted center position can be maintained for a long time, thereby completing the center alignment between the moving template and the fixed template.

[0074] In another embodiment, the adjustment process of the eccentric center ring assembly 20 on the template side does not require manual close-range operation or disassembly of related components. Instead, it is remotely adjusted via a drive mechanism mounted on the eccentric center ring assembly. This drive mechanism is connected to a remote control device or control terminal. When the laser detection component 30 outputs the center deviation result in real time, it drives the second inner ring 21 and the second outer ring 22 in the eccentric center ring assembly to rotate around the central axis via remote control, so that the center position is compensated accordingly according to the detection result. During the adjustment process, multiple detection and correction operations can be completed without stopping the mold closing state or disassembling the fixture. When the center deviation reaches the preset accuracy range, the drive mechanism is controlled to lock and fix it in conjunction with the positioning structure, thereby achieving the centering of the template without additional manual intervention.

[0075] This invention enables high-precision and repeatable template center alignment under actual working conditions of the injection molding machine. It transforms the traditional open-loop adjustment method that relies on manual experience to a feedback adjustment method based on objective detection results, reducing the impact of human factors on the adjustment results and shortening the alignment operation time.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A centering device for the center of a mold plate of an injection molding machine with a carousel, characterized in that The application relates to a mold centering device for injection molding machines, comprising: a movable mold plate side center ring assembly coaxially arranged with a rotating disc on the movable mold plate side of an injection molding machine; wherein the movable mold plate side center ring assembly comprises a first outer ring and a first inner ring, the first outer ring is position-adjustable relative to the movable mold plate rotating disc, and the first inner ring is coaxially arranged with and fixedly connected to the first outer ring to form a combined ring structure with an inner and outer concentric structure; a displacement measuring device comprising a balance ruler and a dial indicator, the balance ruler is used for supporting and fixing the dial indicator and can be arranged on a Green column or an equivalent supporting part on the movable mold plate side of the injection molding machine, the dial indicator is mounted on the balance ruler, a measuring head of the dial indicator is in contact with the first inner ring, and the displacement measuring device is used for detecting the radial runout of a center hole of the first inner ring when the movable mold plate rotating disc rotates; the movable mold plate side center ring assembly is adjusted according to the radial runout so that the center hole of the movable mold plate side center ring assembly is concentric with a rotating shaft of the movable mold plate side rotating disc, and the movable mold plate side center ring assembly is fixed after the adjustment is completed; a fixed mold plate side adjustable center ring assembly arranged at a center position of a fixed mold plate of the injection molding machine and used for compensating for a center deviation between the movable mold plate side rotating disc and the fixed mold plate; a laser detection assembly comprising a laser emitting assembly and a laser receiving assembly, the laser emitting assembly is arranged at a center position of the movable mold plate side, the laser receiving assembly is arranged at a center position of the fixed mold plate side, and the laser detection assembly is used for detecting a center deviation between the movable mold plate and the fixed mold plate during mold clamping of the movable mold plate and the fixed mold plate; the fixed mold plate side adjustable center ring assembly is adjusted according to the center deviation so as to realize centering of the movable mold plate and the fixed mold plate.

2. The centering device of claim 1, wherein, A tight fit is adopted between an outer circumferential surface of the first inner ring and an inner circumferential surface of the first outer ring.

3. The centering device of claim 2, wherein, A center hole of the inner ring is used for mounting a mold.

4. The centering device of claim 1, wherein, The fixed mold plate side adjustable center ring assembly comprises a second inner ring and a second outer ring, a center hole of the second outer ring is arranged with a first eccentricity relative to a center of the fixed mold plate side, a center hole of the second inner ring is arranged with a second eccentricity relative to the center hole of the second outer ring, and the first eccentricity and the second eccentricity are opposite in direction.

5. The centering device of claim 4, wherein, At least one of the second inner ring and the second outer ring can rotate relative to the fixed mold plate around a central axis thereof, so that a center hole of the fixed mold plate side eccentric center ring assembly generates a continuously adjustable position change in a plane, so as to realize fine adjustment of the center deviation.

6. The centering device of claim 1, wherein, The laser emitting assembly is arranged at the movable mold plate side center ring assembly through a clamp and takes a central axis of the movable mold plate side center ring assembly as a laser emitting reference axis.

7. The centering device of claim 6, wherein, The laser receiving assembly is arranged at the fixed mold plate side adjustable center ring assembly through a clamp and is coaxially positioned with a center hole of the fixed mold plate side adjustable center ring assembly.

8. The centering device of claim 7, wherein, The laser detection assembly detects the center deviation between the movable mold plate and the fixed mold plate when the injection molding machine is in a mold clamping state.

9. The centering device of claim 8, wherein, The fixed mold plate side adjustable center ring assembly is adjusted according to the center deviation, so that the center deviation between the movable mold plate and the fixed mold plate is adjusted to be within a preset range.

10. A centering method for the centering of an injection molding machine platen, which applies the centering device according to any one of the preceding claims 1 to 9, characterized in that, The application further relates to a mold centering method for injection molding machines, comprising the following steps: S1, measuring the radial runout of the center hole of the first inner ring when the movable mold plate rotating disc rotates by using a displacement measuring device; According to the radial runout, the centering between the movable mold plate side center ring assembly and the rotating disc is performed, and after the centering is completed, the movable mold plate side center ring assembly is fixed to form a stable movable mold plate rotating disc side center reference; S2, installing the movable mold plate side adjustable center ring assembly on the fixed mold plate side, and making the movable mold plate side adjustable center ring assembly in the initial installation state; S3, installing the laser emitting assembly at the center position of the movable mold plate side rotating disc, and taking the center axis of the movable mold plate side center ring assembly as the laser emitting reference axis, and installing the laser receiving assembly at the center position of the fixed mold plate side, and making the laser receiving assembly coaxially positioned with the center hole of the movable mold plate side adjustable center ring assembly; S4, controlling the injection molding machine to close the mold, and detecting the center deviation between the movable mold plate and the fixed mold plate by the laser detection assembly during the closing process; S5, according to the center deviation, adjusting the movable mold plate side adjustable center ring assembly to compensate the center deviation to the preset range, and realizing the centering of the movable mold plate and the fixed mold plate.

11. The method of centering of claim 11, wherein, In the step S4, the center deviation is characterized by the optical axis offset between the laser emitting assembly and the laser receiving assembly.

12. The method of centering of claim 11, wherein, In the step S5, by rotating the second inner ring and / or the second outer ring of the movable mold plate side adjustable center ring assembly around the center axis thereof, the center position of the movable mold plate side adjustable center ring assembly is continuously adjustable in the plane.

13. The method of centering of claim 12, wherein, The steps S4 and S5 are alternately executed until the center deviation between the movable mold plate and the fixed mold plate is adjusted to the preset range.

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