Quick bottom-milling production-changing clamp for three large plates of injection molding machine

Abstract

The utility model relates to a quick bottom-milling production-changing clamp for three plates of an injection molding machine, which belongs to the technical field of installation and replacement of injection molding machines and comprises an explorator, a replacement mechanism is arranged on the outer wall of the explorator, and the replacement mechanism comprises two first positioning pins which are installed on the outer wall of the bottom of the explorator. And four equal-height cushion blocks are installed at the top of the explorator, second positioning pins are installed at the tops of the equal-height cushion blocks, and M screw rods are in threaded connection with the interiors of the second positioning pins. According to the rapid bottom-milling production-changing clamp for the three large plates of the injection molding machine, the explorator is additionally arranged below the four equal-height cushion blocks, positioning pins are installed through preformed holes in the explorator to place the equal-height cushion blocks, the pressing plate is also changed to be pressed through four large through holes of a workpiece, after the positions of the equal-height cushion blocks are limited through the positioning pins on the explorator, the positioning pins are further additionally installed on the cushion blocks, and therefore the bottom-milling production-changing production-changing clamp for the three large plates of the injection molding machine is achieved. And one-surface two-pin positioning of the workpiece is realized, so that the workpiece can be completely positioned by the positioning pins, and the position of the workpiece does not need to be manually calibrated.

Description

Technical Field

[0001] The utility model relates to the technical field of installation and replacement of injection molding machines, in particular to a three-plate milling bottom quick production replacement fixture for injection molding machines. Background Art

[0002] At present, the milling bottom of the three plates of the mold part of the injection molding machine is generally clamped and processed by a split fixture. It is installed on the machine tool workbench with 4 equal-height blocks, leveled with a dial indicator, calibrated with a template, and the workpiece is installed.

[0003] The existing clamping method needs to be repeated for each workpiece: installation, leveling the datum with a dial indicator, and template calibration steps. For unprocessed casting surfaces, the datum finding and template calibration steps take a long time, because each operation will have variables for different casting surfaces. It is not a programmed operation that can be completed overnight, but requires the operator to have certain experience and be good at adapting to different situations. This results in the clamping process not only being time-consuming, but also limiting the operating experience of employees. Machining of large castings such as three large plates is usually a very time-consuming process, involving multiple steps such as multi-faceted milling, drilling and boring. Complex and time-consuming installation means low machining efficiency. The low machining efficiency of a single process will have a negative impact on the entire process flow, which is not conducive to improving workshop production efficiency or reducing machining costs. If only one type of workpiece is improved, then when the machine tool switches the type of workpiece to be processed, it will face the problem of replacing and recalibrating heavy fixtures, which wastes a lot of changeover time and poses safety and quality risks. Therefore, a three-plate milling bottom quick-change fixture for injection molding machines is proposed. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a three-plate milling bottom quick-change fixture for an injection molding machine, which has the advantages of improving the replacement efficiency and solving the problem of only improving one type of workpiece. When the machine tool switches the type of workpiece to be processed, it will face the problem of replacing and recalibrating the heavy fixture, which greatly wastes the production change time and poses safety and quality risks.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a three-plate milling bottom quick production change fixture for an injection molding machine, comprising a backing mold, and the outer wall of the backing mold is provided with a replacement mechanism;

[0006] The replacement mechanism includes two first positioning pins installed on the outer wall of the bottom of the support mold, four equal-height pads are installed on the top of the support mold, and second positioning pins are installed on the top of the equal-height pads. The internal thread of the second positioning pin is connected with an M screw rod, and a small pressure plate is installed on the outer peripheral wall of the M screw rod. A washer is slidably connected to the outer peripheral wall of the M screw rod, and an M nut is threadedly connected to the outer peripheral wall of the M screw rod, and a workpiece is installed on the outer peripheral wall of the M screw rod.

[0007] Furthermore, two reserved holes are opened inside the master mold, and the first positioning pins are installed inside the reserved holes and have sizes that match the first positioning pins.

[0008] Furthermore, the first positioning pin is fixedly mounted on the bottom outer wall of the equal height cushion block.

[0009] Furthermore, four mounting holes are opened inside the workpiece, and the M screw rods are installed inside the mounting holes and have matching sizes.

[0010] Furthermore, the small pressing plate is movably installed on the top of the workpiece.

[0011] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0012] The three-platen milling bottom quick-change fixture of the injection molding machine adds a backing mold under the four equal-height pads, and installs locating pins through the reserved holes on it to place the equal-height pads. The small pressure plate is also changed to be clamped through the four large through holes of the workpiece. After the position of the equal-height pads is limited by the locating pins on the backing mold, locating pins are further installed on the pads to achieve two-pin positioning on one side of the workpiece. In this way, the positioning of the workpiece can be completely handed over to the locating pins, and there is no need to manually calibrate the workpiece position. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 Installation structure diagram;

[0015] Figure 3 This is a schematic diagram of the bottom structure of the prototype of the utility model;

[0016] Figure 4 This is a schematic structural diagram of the second embodiment of the utility model;

[0017] Figure 5 This is a schematic structural diagram of the third embodiment of the utility model.

[0018] In the figure: 1. Backing mold; 2. First positioning pin; 3. Equal height spacer; 4. Second positioning pin; 5. M20 screw rod; 6. Small pressure plate; 7. Washer; 8. M20 nut; 9. Workpiece. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] For example, see Figures 1 to 4 In this embodiment, a three-plate milling bottom quick-change fixture for an injection molding machine includes a backing mold 1, and a replacement mechanism is provided on the outer wall of the backing mold 1.

[0021] The replacement mechanism includes two first locating pins 2 installed on the bottom outer wall of the backing mold 1, two reserved holes are opened inside the backing mold 1, the first locating pins 2 are installed inside the reserved holes and are of suitable size, four equal-height pads 3 are installed on the top of the backing mold 1, the first locating pins 2 are fixedly installed on the bottom outer wall of the equal-height pads 3, the top of the equal-height pads 3 is installed with a second locating pin 4, the internal thread of the second locating pin 4 is connected with an M20 screw rod 5, the outer peripheral wall of the M20 screw rod 5 is installed with a small pressure plate 6, the outer peripheral wall of the M20 screw rod 5 is slidably connected with a washer 7, the outer peripheral wall of the M20 screw rod 5 is threaded with an M20 nut 8, the outer peripheral wall of the M20 screw rod 5 is installed with a workpiece 9, four mounting holes are opened inside the workpiece 9, the M20 screw rod 5 is installed inside the mounting holes and of suitable size, and the small pressure plate 6 is movably installed on the top of the workpiece 9.

[0022] Embodiment 2: The workpiece 9 of embodiment 2 is different from that of embodiment 1, but the overall installation steps are the same.

[0023] Embodiment 3: The workpiece 9 of embodiment 3 is different from that of embodiment 1 and embodiment 2, but the overall installation steps are the same.

[0024] In this embodiment, according to Figure 4 and Figure 5 As shown, the number of reserved holes for locating pins on the fixture has been expanded to twenty-two groups, so that the fixture can realize clamping and processing for workpieces 9 of similar structures of different sizes, which significantly increases the versatility of the fixture, solves the problem of needing to replace the fixture when the type of workpiece 9 to be processed changes, saves time for fixture replacement and recalibration, and reduces quality risks caused by repeated realignment and recalibration.

[0025] In this embodiment, the operating difficulty is greatly reduced: the original template calibration clamping is changed to positioning pin hole clamping, and the clamping difficulty is greatly reduced. The new clamping method has very low requirements on the operating experience of employees. Even beginners only need simple training to complete the correct clamping, which is of great help to the coordination and deployment of personnel in the workshop.

[0026] In this embodiment, the processing efficiency is greatly improved: the tedious calibration steps are omitted, and only simple clamping is required to achieve the original installation, leveling of the benchmark, and the effect after the template calibration, which significantly saves the clamping time and greatly improves the processing efficiency.

[0027] In this embodiment, the error-proofing function is greatly improved: the positioning of the locating pin only needs to be calibrated once and the finished product is processed correctly, which can ensure that there will be no errors in the subsequent processing of the workpiece 9. It is not necessary to confirm each part one by one, which helps to simplify quality control during mass production and ensure the consistency of product production.

[0028] In this embodiment, wide versatility: for similar parts, the fixture can adjust the applicable workpiece 9 by adjusting the position of the first locating pin 2. After adjusting the first locating pin 2, it is only necessary to ensure that the first part to be processed is calibrated correctly to achieve efficient mass production. Multiple groups of locating pin holes are reserved on the fixture, which are sufficient to cope with similar structural parts of various sizes and specifications, and the fixture replacement operation that is usually required when the machine tool replaces the processed parts is omitted.

[0029] The working principle of the above embodiment is:

[0030] A mold is added under the four equal-height pads 3, and the first locating pins 2 are installed through the reserved holes on the mold to place the equal-height pads 3. The small pressure plate 6 is also changed to be clamped through the four large through holes of the workpiece 9. After the position of the equal-height pads 3 is limited by the first locating pins 2 on the mold 1, the second locating pins 4 are further installed on the pads to achieve two-pin positioning on one side of the workpiece 9. In this way, the positioning of the workpiece 9 can be completely handed over to the first locating pins 2 and the second locating pins 4, and there is no need to manually calibrate the position of the workpiece 9.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-plate milling bottom quick-change fixture for an injection molding machine, comprising a master mold (1), characterized in that: The outer wall of the master mold (1) is provided with a replacement mechanism; The replacement mechanism comprises two first positioning pins (2) installed on the outer wall of the bottom of the support mold (1), four equal-height pads (3) installed on the top of the support mold (1), a second positioning pin (4) installed on the top of the equal-height pad (3), an M20 screw rod (5) connected to the inner thread of the second positioning pin (4), a small pressure plate (6) installed on the outer peripheral wall of the M20 screw rod (5), a washer (7) slidably connected to the outer peripheral wall of the M20 screw rod (5), an M20 nut (8) threadedly connected to the outer peripheral wall of the M20 screw rod (5), and a workpiece (9) installed on the outer peripheral wall of the M20 screw rod (5).

2. The three-platen milling bottom quick production change fixture for injection molding machine according to claim 1, characterized in that: Two reserved holes are provided inside the master mold (1), and the first positioning pins (2) are installed inside the reserved holes and have matching sizes.

3. The three-platen milling bottom quick production change fixture for injection molding machine according to claim 1, characterized in that: The first positioning pin (2) is fixedly mounted on the bottom outer wall of the equal height cushion block (3).

4. The three-platen milling bottom quick production change fixture for injection molding machine according to claim 1, characterized in that: The workpiece (9) is provided with four mounting holes inside, and the M20 screw rods (5) are installed inside the mounting holes and have matching sizes.

5. The three-platen milling bottom quick production change fixture for injection molding machine according to claim 1, characterized in that: The small pressing plate (6) is movably mounted on the top of the workpiece (9).

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