Aligning device for movable mold plate of injection molding machine with turntable and aligning method of aligning device

Abstract

The invention discloses an aligning device for a movable template of an injection molding machine with a turntable and an aligning method of the aligning device, and relates to the technical field of aligning of the movable template of the injection molding machine with the turntable, the injection molding machine comprises the movable template and the turntable arranged on a side bearing of the movable template, and the aligning device comprises a center ring assembly and a displacement measuring device. The central ring assembly and a turntable on the side of a movable template of the injection molding machine are coaxially arranged; the displacement measuring device is used for detecting the radial runout of the center hole of the inner ring when the movable template turntable rotates; the center ring assembly is adjusted according to the radial run-out value so that a center hole of the center ring assembly can be concentric with a rotating shaft of the movable mold plate side rotating disc, and the center ring assembly is fixed after adjustment is completed. The problems that in the prior art, the center position of the rotating disc of the movable mold plate is adjusted depending on artificial experience, and the adjusting precision is low are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centering of movable mold plate of injection molding machine with rotating disc, and particularly relates to a centering device for movable mold plate of injection molding machine with rotating disc and a centering method thereof. BACKGROUND

[0002] In the actual production process of the injection molding machine, the centering precision between the rotating disc of the movable mold plate and the fixed mold plate directly affects the assembly quality of the mold, the mold clamping stability and the product forming precision. In the existing injection molding machine, the movable mold plate side usually takes the rotating disc, the pull rod or the mold mounting surface as the assembly reference. During the mold mounting or equipment debugging stage, the adjustment of the center position of the mold plate is realized by manual alignment, simple alignment or relying on the structure of the mold. However, this kind of centering method is mainly based on experience, lacks a unified and stable center reference, the adjustment process is difficult to be quantitatively detected, and is easily affected by the installation personnel level, assembly sequence and on-site working conditions.

[0003] In actual use, the center position of the movable mold plate side often deviates with the multiple disassembly and assembly of the mold, the deformation of the mold plate under stress or the change of the bearing gap, resulting in the gradual decrease of the coaxial precision between the mold plate and the mold. In the existing technology, even if a dial gauge is used for auxiliary detection, the measurement object is mostly the local position of the mold or the mold plate, and a stable center reference cannot be established at the key rotating reference of the rotating disc bearing, so that the centering result is difficult to be consistent in subsequent operation. At the same time, the existing centering structure is mostly one-time adjustment, and after the adjustment is completed, there is lack of effective locking and solidification means, so that looseness or deviation is easily caused during long-term operation or under alternating load of the equipment. SUMMARY

[0004] Therefore, the present application provides a centering device for movable mold plate of injection molding machine with rotating disc and a centering method thereof, to solve the technical problems that in the prior art, the center reference of the movable mold plate with rotating disc relies on the mold or manual alignment, the centering process is difficult to be quantified, and the adjustment result is difficult to be kept for a long time, resulting in that the center of the mold plate and the mold is easily deviated, the coaxial precision is unstable and the like during multiple assembly and disassembly or long-term operation.

[0005] To achieve the above object, one aspect of the present application provides a centering device for a movable mold plate of an injection molding machine with a rotating disc, the injection molding machine comprising a movable mold plate and a rotating disc arranged on a rotating shaft of the movable mold plate, the centering device comprising a center ring assembly and a displacement measuring device, the center ring assembly being coaxially arranged with the rotating disc of the movable mold plate of the injection molding machine; wherein the center ring assembly comprises an outer ring and an inner ring, the outer ring being positionally adjustable relative to the rotating disc of the movable mold plate, the inner ring being coaxially arranged with and fixedly connected to the outer ring to form a combined ring structure concentrically arranged inside and outside; the displacement measuring device comprising a balance ruler and a dial indicator, the balance ruler being used to support and fix the dial indicator and being arranged on a Green column or an equivalent support part of the movable mold plate of the injection molding machine, the dial indicator being arranged on the balance ruler, a measuring head of the dial indicator being in contact with the inner ring, the displacement measuring device being used to detect a radial run-out amount of a center hole of the inner ring when the rotating disc of the movable mold plate rotates; the center ring assembly is adjusted according to the radial run-out amount so that the center hole of the center ring assembly is concentric with the rotating shaft of the rotating disc of the movable mold plate, and the center ring assembly is fixed after the adjustment is completed.

[0006] According to the above embodiment, the outer ring is arranged on the rotating disc of the movable mold plate through fasteners, and an adjustable gap is formed between the outer ring and the rotating disc of the movable mold plate, the adjustable gap being used to insert a feeler gauge with different thicknesses to adjust the position of the outer ring in the up-down direction and the left-right direction.

[0007] According to the above embodiment, the inner ring is fixedly connected to the outer ring in a tight fit manner to realize the coaxial stability of the inner ring and the outer ring.

[0008] According to the above embodiment, the inner ring is provided with a center hole, and the center hole is used to arrange a mold.

[0009] According to the above embodiment, the inner ring is provided with a measuring matching part for radial run-out detection, the measuring matching part being in contact with the displacement measuring device to detect the radial run-out amount of the center hole relative to the center axis of the rotating shaft.

[0010] According to the above embodiment, the outer ring is fixedly connected to the rotating disc of the movable mold plate through a positioning structure after the centering is completed, and the positioning structure is a positioning pin.

[0011] Another aspect of the present application provides a centering method for a movable mold plate of an injection molding machine with a rotating disc, the centering method applying the above-mentioned centering device and comprising the following steps: S1, arranging the center ring assembly of the movable mold plate on the rotating shaft of the rotating disc of the movable mold plate and making the outer ring in a radially adjustable state; S2, inserting a feeler gauge with different thicknesses between the outer ring and the rotating disc of the movable mold plate to preliminarily adjust the concentricity of the outer ring; S3. Using the rotation axis of the turntable as the rotation reference, use a displacement measuring device to detect the radial runout of the inner ring center hole; S4. When the radial runout exceeds the preset range, make a slight adjustment to the outer ring and repeat the detection until the radial runout is within the preset range. S5. Finally tighten the outer ring and fix it to the moving template turntable with the positioning pin to complete the establishment of the moving template side center reference.

[0012] Compared with existing technologies, this invention has beneficial effects. This invention utilizes a concentric ring structure consisting of an outer ring and an inner ring. The outer ring allows for minute position adjustments relative to the moving template turntable, while the inner and outer rings are tightly fitted to form a stable integrated structure. An adjustable gap is created between the outer ring and the moving template turntable, and a feeler gauge is used to achieve fine adjustments in the up-down and left-right directions, making the self-aligning process controllable and repeatable, significantly improving self-aligning accuracy. Simultaneously, by setting a radial runout detection measuring mating part on the inner ring, and combining it with a displacement measuring device consisting of a balance ruler and a dial indicator, the radial runout of the center hole relative to the bearing can be detected in real time during turntable rotation, allowing for precise adjustment. After self-aligning, the outer ring is fixed to the moving template turntable by a locating pin, ensuring that the center ring assembly maintains its predetermined coaxial position during subsequent mold assembly and long-term operation. Attached Figure Description

[0013] 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.

[0014] Figure 1 This is a schematic diagram of the self-aligning device according to an embodiment of the present invention.

[0015] Figure Labels The components include: a central ring assembly 10, an inner ring 11, an outer ring 12, a displacement measuring device 20, a balance ruler 21, and a dial indicator 22. Detailed Implementation

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] A self-aligning device for a moving platen of an injection molding machine with a turntable, the injection molding machine including a moving platen and a turntable disposed on a rotating shaft on the moving platen side, the self-aligning device including a central ring assembly 10 and a displacement measuring device 20, the central ring assembly 10 being coaxially arranged with the turntable on the moving platen side of the injection molding machine; wherein, the central ring assembly 10 includes an outer ring 12 and an inner ring 11, the outer ring 12 being positionally adjustable relative to the moving platen turntable, the inner ring 11 being coaxially arranged with and fixedly connected to the outer ring 12, forming a concentric combined ring structure; the displacement measuring device 20 includes a balance scale. 21 and dial indicator 22, balance ruler 21 is used to support and fix dial indicator 22, and can be set on the Green column or equivalent support part on the moving template side of injection molding. Dial indicator 22 is mounted on balance ruler 21. The probe of dial indicator 22 is in contact with inner ring 11. Displacement measuring device 20 is used to detect the radial runout of the center hole of inner ring 11 when the moving template turntable rotates. Adjust the center ring assembly 10 according to the radial runout so that the center hole of the center ring assembly 10 is concentric with the rotation axis of the moving template side turntable, and fix the center ring assembly 10 after adjustment.

[0022] The self-aligning device uses the central axis of the rotating shaft of the injection molding machine's moving template side turntable as the self-aligning reference. Through the cooperation of the central ring assembly 10 and the displacement measuring device 20, it realizes the self-alignment between the mold mounting center of the moving template side and the rotating shaft of the turntable.

[0023] The central ring assembly 10 consists of an outer ring 12 and an inner ring 11. The outer ring 12 is mounted on the rotating plate side and can be adjusted relative to the rotating plate. The inner ring 11 is fixedly connected to the outer ring 12, so that the position of the center hole of the inner ring 11 changes accordingly with the adjustment of the outer ring 12.

[0024] The displacement measuring device includes a balance scale and a dial indicator mounted on the balance scale. The balance scale is positioned on a Green column or equivalent support on the moving template side to maintain a stable position reference for the dial indicator during self-alignment. The dial indicator probe makes contact with the inner ring 11. When the rotating disk on the moving template side rotates around its axis, if the center hole of the inner ring 11 is not concentric with the axis, the dial indicator probe will produce a radial displacement change. This displacement change can be used to obtain the radial runout of the center hole of the inner ring relative to the rotating disk axis.

[0025] By measuring the radial runout, the position of the outer ring 12 is adjusted accordingly, thereby achieving centering of the central ring assembly and the rotating shaft.

[0026] Furthermore, the outer ring 12 is mounted on the moving template turntable by fasteners, and an adjustable gap is formed between the outer ring 12 and the moving template turntable. The adjustable gap is used to insert feeler gauges of different thicknesses for fine adjustment of the position of the outer ring 12 in the vertical and horizontal directions.

[0027] Furthermore, the inner ring 11 and the outer ring 12 are fixedly connected by a tight fit to achieve coaxial stability between the inner and outer rings. Through the design of a predetermined interference fit and the press-fitting process, the inner ring 11 and the outer ring 12 form a stable integrated structure after assembly, with no relative rotation or radial movement between them, thereby ensuring that the center hole of the inner ring 11 always maintains a strict coaxial relationship with the outer ring 12 under any working condition.

[0028] Furthermore, the inner ring 11 is provided with a central hole for mounting the mold.

[0029] Furthermore, the inner ring 11 is provided with a measuring mating part for radial runout detection. The measuring mating part is in contact with the displacement measuring device 20 to detect the radial runout of the center hole relative to the central axis of the rotating shaft.

[0030] Furthermore, the displacement measuring device 20 includes a balance ruler 21 and a dial indicator 22. The balance ruler 21 is used to support and fix the dial indicator 22 and can be set on the Green column or equivalent support part on the side of the injection molding moving template. The dial indicator 22 is mounted on the balance ruler 21, and its probe contacts the measuring mating part of the inner ring 11 to detect the radial runout of the center hole of the inner ring 11 when the moving template turntable rotates.

[0031] Furthermore, after the outer ring 12 is aligned, it is fixedly connected to the moving template turntable through a positioning structure, which is a positioning pin.

[0032] A measuring mating part for radial runout detection is provided on the inner ring 11. During adjustment, this measuring mating part keeps in contact with the detection end of the displacement measuring device 20. The radial runout of the center hole relative to the rotating shaft is obtained by rotating the turntable around the shaft. The displacement measuring device 20 adopts a combination structure of a balance ruler 21 and a dial indicator 22. The balance ruler 21 is straddling the surface of the Green column on the side of the moving template and serves as a support reference. The dial indicator 22 is mounted on the balance ruler 21, and its probe presses against the measuring mating part of the inner ring 11. The runout change is read in real time during the rotation of the turntable, and the position of the outer ring 12 is repeatedly fine-tuned based on the reading. After the alignment is completed and the radial runout of the center hole is confirmed to be within the preset range, a positioning pin is driven between the outer ring 12 and the moving template turntable to reliably fix the outer ring 12 to the turntable in the current alignment position, so that the center ring assembly 10 always maintains a stable coaxial state during subsequent mold assembly and operation.

[0033] A method for self-aligning a motorized injection molding platen with a turntable includes the following steps: S1. Install the moving template side center ring assembly on the rotating shaft of the moving template turntable, and make the outer ring in a radially adjustable state; S2. By inserting feeler gauges of different thicknesses between the outer ring and the moving template turntable, the outer ring is initially concentrically adjusted. S3. Using the rotation axis of the turntable as the rotation reference, use a displacement measuring device to detect the radial runout of the inner ring center hole; S4. When the radial runout exceeds the preset range, make a slight adjustment to the outer ring and repeat the detection until the radial runout is within the preset range. S5. Finally tighten the outer ring and fix it to the moving template turntable with the positioning pin to complete the establishment of the moving template side center reference.

[0034] Example 1: In this embodiment, the injection molding machine includes a moving platen and a turntable positioned on the side of the moving platen's rotating shaft. A central ring assembly 10 is mounted on the turntable's rotating shaft. The central ring assembly 10 consists of an outer ring 12 and an inner ring 11. During manufacturing, the inner ring 11 and outer ring 12 are assembled together using a predetermined interference fit and a press-fit process. After assembly, there is no relative rotation or radial movement between the inner ring 11 and outer ring 12, forming a stable concentric combination structure. The outer ring 12 is mounted on the turntable using fasteners. A pre-existing assembly gap is provided between the outer ring 12 and the turntable, allowing feeler gauges of different thicknesses to be inserted within this gap, thereby enabling minute position adjustments of the outer ring 12 in the vertical and horizontal directions.

[0035] During the alignment process, the center ring assembly 10 is first installed on the rotating shaft of the turntable, so that the outer ring 12 is in an adjustable state, and the center hole of the inner ring 11 is used to install the mold.

[0036] Specifically, a measuring mating part for radial runout detection is provided on the inner ring 11. During adjustment, this measuring mating part remains in contact with the detection end of the displacement measuring device 20. The displacement measuring device 20 adopts a combination structure of a balance ruler 21 and a dial indicator 22. The balance ruler 21 is straddling the surface of the Green column on the side of the moving template as a stable support reference. The dial indicator 22 is fixedly installed on the balance ruler 21, and its probe presses against the measuring mating part of the inner ring 11.

[0037] During adjustment, the drive turntable rotates around the bearing. A dial indicator 22 is used to read the displacement change of the inner ring 11 mating parts during rotation, thus obtaining the radial runout of the center hole relative to the bearing. Based on the test results, feeler gauges of different thicknesses are inserted between the outer ring 12 and the turntable, and the position of the outer ring 12 is repeatedly fine-tuned to gradually reduce the radial runout. Once the radial runout of the center hole is confirmed to be within a preset range, the fasteners of the outer ring 12 are finally tightened, and a locating pin is driven between the outer ring 12 and the turntable to reliably fix the outer ring 12 to the turntable in its current self-aligning position. Through this method, the center ring assembly 10 achieves a stable coaxial state after installation and adjustment, maintaining the accuracy of the moving template side center reference for a long period during subsequent mold assembly and equipment operation.

[0038] The present invention moves the establishment position of the center reference on the moving template side forward to the rotating shaft of the turntable, and achieves the adjustment of the center reference without changing the original structure of the injection molding machine by setting an adjustable outer ring 12 combined with a tightly fitted integrated inner ring 11 center ring assembly 10.

[0039] During the self-alignment process, only the outer ring 12 is used for position adjustment, while the inner ring 11, as the shared central reference for mold installation and inspection, always maintains structural stability, effectively avoiding the problem of central reference drift caused by multiple disassembly and assembly or operating loads in the prior art. At the same time, the present invention quantitatively detects the coaxial relationship between the central hole and the rotating shaft based on the radial runout under actual mold closing conditions, and permanently locks the self-alignment state through the positioning structure after adjustment, so that the central reference on the moving mold plate side can maintain consistency and stability during long-term operation.

[0040] 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 movable platen of an injection molding machine with a carousel, characterized in that, The injection molding machine comprises a movable mold plate and a rotating disc arranged on a rotating shaft of the movable mold plate, and the centering device comprises: a center ring assembly coaxially arranged with the rotating disc on the movable mold plate side of the injection molding machine; wherein the center ring assembly comprises an outer ring and an inner ring, the outer ring is positionally adjustable relative to the rotating disc of the movable mold plate, and the inner ring is coaxially arranged and fixedly connected with the outer ring to form a combined ring structure with the inner and outer rings concentric; a displacement measuring device comprising a balance ruler and a dial indicator, the balance ruler is used to support and fix 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 installed on the balance ruler, the measuring head of the dial indicator is in contact with the inner ring, and the displacement measuring device is used to detect the radial runout of the center hole of the inner ring when the rotating disc of the movable mold plate rotates; the center ring assembly is adjusted according to the radial runout so that the center hole of the center ring assembly is concentric with the rotating shaft of the rotating disc of the movable mold plate side, and the center ring assembly is fixed after the adjustment is completed.

2. The aligning device of claim 1, wherein The outer ring is installed on the rotating disc of the movable mold plate by means of fasteners, and an adjustable gap is formed between the outer ring and the rotating disc of the movable mold plate, which is used to insert feeler gauges of different thicknesses for micro-adjustment of the position of the outer ring in the up-down and left-right directions.

3. The aligning device of claim 1, wherein The inner ring is fixedly connected with the outer ring in a tight fit manner to realize the coaxial stability of the inner and outer rings.

4. The aligning device of claim 1, wherein The inner ring is provided with a center hole for installing a mold.

5. The aligning device of claim 1, wherein The inner ring is provided with a measuring matching part for radial runout detection, which is in contact with the displacement measuring device to detect the radial runout of the center hole relative to the center axis of the rotating shaft.

6. The aligning device of claim 1, wherein The outer ring is fixedly connected with the rotating disc of the movable mold plate by means of a positioning structure after the centering is completed, and the positioning structure is a positioning pin.

7. A method for aligning the movable mold plate of an injection molding machine with a carousel, using the aligning device according to any one of claims 1 to 6, characterized in that The method comprises the following steps: S1, installing the center ring assembly on the movable mold plate side on the rotating shaft of the rotating disc of the movable mold plate, and making the outer ring in a radially adjustable state; S2, preliminarily adjusting the concentricity of the outer ring by inserting feeler gauges of different thicknesses between the outer ring and the rotating disc of the movable mold plate; S3, using the displacement measuring device to detect the radial runout of the center hole of the inner ring with the rotating shaft of the rotating disc as the rotation reference; S4, when the radial runout exceeds the preset range, micro-adjusting the outer ring and repeating the detection until the radial runout is within the preset range; S5, finally fastening the outer ring and fixing the outer ring with the rotating disc of the movable mold plate by means of the positioning pin to complete the establishment of the center reference on the movable mold plate side.

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