A gauge for EPP forming

Abstract

This utility model discloses a testing fixture for EPP molding, including a worktable, an externally fixedly connected mounting frame, a lower testing component on the top of the worktable, an internally fixedly connected electric guide rail, an externally slidably connected connecting plate to the electric guide rail, and an externally fixedly connected upper testing component on the connecting plate. The lower testing component includes a base plate with positioning holes at the four corners of its top, and insertion pins fixedly connected to the lower part of the inner wall of the positioning holes. A limit hole is provided on the top of the worktable. This utility model covers the EPP box with an internal testing block, and the shape of the internal testing block is consistent with the shape inside the box. Activating the electric guide rail controls the upper testing component to move downwards, so that the external testing box covers the outside of the box. The pressure exerted by the box on the EPP box is detected by a sensor. If the pressure is within a certain range, the product is considered qualified, thus improving the efficiency and accuracy of the testing.

Description

Technical Field

[0001] This utility model relates to the field of EPP testing technology, and in particular to a gauge for EPP molding. Background Technology

[0002] EPP (expanded polypropylene) is a closed-cell foam material composed of solid and gas. It is widely used in the packaging industry for cushioning precision instruments, the automotive industry for bumpers and seat components, electronic equipment liners, logistics partitions, sports equipment such as sports helmets, and building sound insulation fillers. During the production process, EPP material is heated and shaped through a mold. After the EPP storage box is removed from the mold, slight shape changes (deformation) and dimensional rebound will occur due to the release of internal stress or uneven cooling, which requires the detection of its dimensional data.

[0003] The existing inspection method involves clamping the EPP storage box with a fixture and observing whether the gap between the outer contour of the part and the surface of the fixture is uniform. A go / no-go gauge or feeler gauge can be inserted into the gap. If a feeler gauge of a specific size can be inserted, it indicates that the gap is too large (the part has shrunk) or too small (the part has expanded). However, the clamping force of the fixture may affect the EPP storage box during fixation. When clamping with pliers, if the force is not appropriate, the part may be locally compressed, affecting the inspection results. Conversely, if it is not clamped tightly, the part cannot be stabilized on the reference position, which will lead to errors in the inspection data. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art that when clamping with clamps, if the force is not appropriate, the part may be locally compressed, affecting the test results. Conversely, if the clamping is not tight enough, the part cannot be stabilized on the reference position, which will lead to errors in the test data. Therefore, this invention proposes a gauge for EPP molding.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A fixture for EPP molding includes a worktable, an externally fixedly connected mounting frame, a lower inspection component on the top of the worktable, an internally fixedly connected electric guide rail, an externally slidably connected connecting plate to the electric guide rail, an externally disposed upper inspection component on the connecting plate, and a limit hole on the top of the worktable. The lower detection component includes a substrate, with positioning holes at the four corners of the top of the substrate. A plug is fixedly connected to the lower part of the inner wall of the positioning hole, and the plug is inserted into the inside of the limiting hole. An internal detection block is fixedly connected to the top of the substrate, and a detection sensor is fixedly connected to the outside of the internal detection block. The upper detection component includes a mounting plate, which is disposed outside the connecting plate. An external detection box is fixedly connected to the bottom of the mounting plate, and telescopic positioning rods are fixedly connected to the four corners of the bottom of the mounting plate. The lower ends of the telescopic positioning rods are disposed inside the positioning holes.

[0006] As a preferred technical solution of this application, an electromagnet is fixedly connected to the top of the workbench, and the top of the electromagnet is attached to the bottom of the substrate.

[0007] As a preferred technical solution of this application, the external detection box is disposed outside the internal detection block, and a plurality of detection sensors are disposed inside the external detection box.

[0008] As a preferred technical solution of this application, an installation assembly is provided between the mounting plate and the connecting plate. The installation assembly includes a fixing block fixedly connected to the outside of the connecting plate. A T-shaped groove is provided inside the fixing block. A T-shaped block is fixedly connected to the top of the mounting plate. The outside of the T-shaped block fits into the inside of the T-shaped groove.

[0009] As a preferred technical solution of this application, a limiting plate is rotatably connected at the opening of the T-slot, and a fastener is provided between the limiting plate and the fixing block.

[0010] As a preferred technical solution of this application, a marking component is provided on the top of the workbench. The marking component includes a paint tank fixedly connected to the workbench, a paint pump fixedly connected to the top of the paint tank, a delivery pipe fixedly connected to the output end of the paint pump, and a spray head fixedly connected to the end of the delivery pipe away from the paint pump.

[0011] As a preferred technical solution of this application, the nozzle is externally fixedly mounted on the outside of the electric push rod, the cylinder of the electric push rod is fixedly connected to the outside of the mounting frame, and the electric push rod is located on the outside of the internal detection block.

[0012] Compared with the prior art, this utility model provides a gauge for EPP molding, which has the following beneficial effects: 1. By setting up the lower and upper detection components, the EPP box is covered on the internal detection block, and the shape of the internal detection block is consistent with the shape inside the box. Then, the electric guide rail is activated to control the upper detection component to move downward, so that the external detection box is covered on the outside of the box. Then, the detection sensor detects the squeezing force of the box on it. If it is within a certain range, it is a qualified product. The internal and external parts of the box can be detected at the same time, which improves the efficiency and accuracy of the detection.

[0013] 2. By using the installed components, the T-block is inserted into the T-slot, and then the limiting plate is rotated to the opening of the T-slot and fixed with the buckle. This facilitates the installation of the upper detection component. The lower detection component can be positioned in the middle of the processing table by using the limiting hole and the plug-in post, keeping the two detectors aligned. The lower detection component can be fixed by the electromagnet, which facilitates the replacement of the detection component and improves the ease of use. Attached Figure Description

[0014] Figure 1 This is a perspective view of a gauge for EPP molding proposed in this utility model; Figure 2 This is a schematic diagram of a workbench for an EPP molding inspection fixture proposed in this utility model; Figure 3 This is a schematic diagram of the upper inspection component of a gauge for EPP molding proposed in this utility model; Figure 4 This utility model proposes a gauge for EPP molding. Figure 2 A schematic diagram of the structure of part A.

[0015] In the picture: 1. Workbench; 101. Mounting frame; 102. Electric guide rail; 103. Connecting plate; 104. Limiting hole; 105. Electromagnet; 2. Lower detection assembly; 201. Base plate; 202. Positioning hole; 203. Insertion post; 204. Internal detection block; 205. Detection sensor; 3. Mounting assembly; 301. Fixing block; 302. T-slot; 303. Fastener; 304. Limiting plate; 4. Upper detection assembly; 401. Mounting plate; 402. T-block; 403. External detection box; 404. Telescopic positioning rod; 5. Marking assembly; 501. Paint tank; 502. Paint pump; 503. Delivery pipe; 504. Sprayer head; 505. Electric push rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. Example

[0017] Reference Figure 1-3A fixture for EPP molding includes a workbench 1, with a mounting frame 101 fixedly connected to the outside of the workbench 1. A lower inspection component 2 is disposed on the top of the workbench 1. An electric guide rail 102 is fixedly connected inside the mounting frame 101. A connecting plate 103 is slidably connected to the outside of the electric guide rail 102. An upper inspection component 4 is disposed outside the connecting plate 103. A limit hole 104 is formed on the top of the workbench 1. The lower inspection component 2 includes a base plate 201. Positioning holes 202 are formed at the four corners of the top of the base plate 201. The lower part of the inner wall of the positioning hole 202... A plug-in post 203 is fixedly connected and inserted into the inside of the limiting hole 104. An internal detection block 204 is fixedly connected to the top of the base plate 201, and a detection sensor 205 is fixedly connected to the outside of the internal detection block 204. The upper detection assembly 4 includes a mounting plate 401, which is disposed outside the connecting plate 103. An external detection box 403 is fixedly connected to the bottom of the mounting plate 401, and telescopic positioning rods 404 are fixedly connected to the four corners of the bottom of the mounting plate 401. The lower end of the telescopic positioning rods 404 is disposed inside the positioning hole 202.

[0018] During operation, the lower detection component 2, which matches the shape of the specific EPP product, is first aligned with the limiting hole 104 on the worktable 1 through the insertion post 203, thereby achieving quick installation and precise positioning. Then, the EPP part to be tested is placed on the internal detection block 204, so that its inner cavity and the contour of the detection block are initially fitted. Next, the electric guide rail 102 is activated to drive the connecting plate 103 to move the entire upper detection component 4 downward. The telescopic positioning rod 404 will gradually insert into the positioning hole 202 at the top of the base plate 201. If the four corners are aligned, it indicates that the positions of the detection components are consistent. If a deviation occurs, an alarm will be triggered. After the part is covered by the external detection box 403, multiple internal detection sensors 205 directly contact the inner and outer walls of the box to collect contour data. The data fed back by the detection sensors 205 can quickly complete the detection of the part's size and shape. It should be noted that the telescopic positioning rod 404 is equipped with an alarm and connected to the control panel. The precise insertion of the telescopic positioning rod 404 and the positioning hole 202 ensures that the two detection components have high repeatability positioning accuracy each time the mold is closed, thereby ensuring the reliability of the detection results.

[0019] Reference Figure 2 and Figure 3 A fixture for EPP molding is further provided, wherein an electromagnet 105 is fixedly connected to the top of the workbench 1, and the top of the electromagnet 105 is attached to the bottom of the substrate 201; an external detection box 403 is disposed outside the internal detection block 204, and a number of detection sensors 205 are disposed inside the external detection box 403.

[0020] During the operation of the inspection fixture, after the lower inspection component 2 is positioned on the worktable 1 via the insertion post 203, the electromagnet 105 is activated to generate a strong attraction force, firmly fixing the substrate 201 to the surface of the worktable 1. When it is necessary to replace the lower inspection component 2 with a different model after the inspection is completed, simply disconnecting the current of the electromagnet 105 will eliminate the magnetic force, thus breaking the attraction and fixation between the substrate 201 and the worktable 1. This allows the entire lower inspection component 2 to be easily lifted for replacement, simplifying the operation process. Several detection sensors 205 arranged inside the external inspection box 403 and the sensors on the internal inspection block 204 constitute a complete three-dimensional inspection space. When the upper inspection component 4 is closed with the lower inspection component 2 under the drive of the electric guide rail 102, the box is precisely positioned between the inner and outer inspection groups. Within the detection space comprised of the components, the sensor on the internal detection block 204 monitors the contour deformation of the inner surface of the component, while the sensor on the external detection box 403 simultaneously monitors the contour data of the outer surface of the component. The sensor data from both the inner and outer sides are collected and transmitted simultaneously. By comparing the theoretical model with the actual measurement data of the inner and outer surfaces, multiple quality indicators such as the wall thickness, uniformity, overall deformation, and contour accuracy of key parts of the component can be calculated comprehensively and accurately. It should be noted that the detection sensor 205 includes, but is not limited to, a high-performance flexible dynamic pressure sensor (MSP-R03X1Y2TP), which can be purchased directly from the market. Therefore, its working principle is not difficult for technicians in the relevant field to understand. The shape of the internal detection block 204 is consistent with the internal space shape of the detection box.

[0021] An installation assembly 3 is provided between the mounting plate 401 and the connecting plate 103. The installation assembly 3 includes a fixing block 301 fixedly connected to the outside of the connecting plate 103. A T-slot 302 is provided inside the fixing block 301. The top of the mounting plate 401 is fixedly connected to the T-slot 402, and the outside of the T-slot 402 fits into the inside of the T-slot 302. A limiting plate 304 is rotatably connected to the opening of the T-slot 302. A fastener 303 is provided between the limiting plate 304 and the fixing block 301.

[0022] When it is necessary to install or replace different upper detection components 4, first open the buckle 303 to release the constraint on the limiting plate 304, and rotate the limiting plate 304 outward to fully expose the opening of the T-slot 302. Then, slide the T-block 402 on the top of the mounting plate 401 laterally into the slot along the opening of the T-slot 302. When the T-block 402 has completely reached the bottom of the T-slot 302, rotate the limiting plate 304 inward to reset it so as to close the opening of the T-slot 302. Securely lock the limiting plate 304 and the fixing block 301 with the buckle 303. This achieves a quick and reliable mechanical connection between the mounting plate 401 and the connecting plate 103, reduces the small displacement caused by vibration or force, and ensures the accuracy of the detection data. It also ensures that the same model of detection module can maintain its original installation position after multiple disassemblies and reassemblies.

[0023] Reference Figure 2 and Figure 4 A fixture for EPP molding is further provided with a marking component 5 on the top of the workbench 1. The marking component 5 includes a paint tank 501 fixedly connected to the workbench 1, a paint pump 502 fixedly connected to the top of the paint tank 501, a delivery pipe 503 fixedly connected to the output end of the paint pump 502, and a nozzle 504 fixedly connected to the end of the delivery pipe 503 away from the paint pump 502. The nozzle 504 is fixedly disposed outside the electric push rod 505. The cylinder of the electric push rod 505 is fixedly connected to the outside of the mounting frame 101. The electric push rod 505 is disposed outside the internal detection block 204.

[0024] Once the detection sensor 205 completes the dimensional and geometric tolerance detection of the EPP parts and identifies the defective products, the marking assembly 5 is activated. The electric push rod 505 extends and retracts to move the nozzle 504 closer to the housing. Then, the paint pump 502 starts working to deliver the special marking paint in the paint tank 501 to the nozzle 504 through the delivery pipe 503, and sprays it precisely onto the surface of the housing in an atomized or spot spray manner, thereby completing the automatic marking of the defective products.

[0025] Specifically, in use, this utility model involves: first, selecting a lower detection component 2 that matches the shape of a specific EPP product; then, aligning the insertion post 203 with the limiting hole 104 on the workbench 1 to achieve quick installation and precise positioning; simultaneously, activating the electromagnet 105 to generate a strong attraction force that firmly fixes the substrate 201 to the surface of the workbench 1; when replacing, disconnecting the electromagnet 105 allows the lower detection component 2 to be disassembled; when installing or replacing the upper detection component 4, opening the buckle 303 releases the constraint on the limiting plate 304, and rotating the limiting plate 304 outward to fully expose the opening of the T-slot 302; then, sliding the T-block 402 on top of the mounting plate 401 laterally into the T-slot 302 opening; once the T-block 402 has completely reached the bottom of the T-slot 302, rotating the limiting plate 304 inward to reset it and close the T-slot 302. The opening of plate 2 is secured by a buckle 303, which firmly locks the limiting plate 304 to the fixing block 301, thus achieving a quick and reliable mechanical connection between the mounting plate 401 and the connecting plate 103. The EPP part to be tested is then placed on the internal detection block 204, so that its inner cavity initially fits the contour of the detection block. Then, the electric guide rail 102 is activated to drive the connecting plate 103 to move the entire upper detection assembly 4 downward. During the movement, the telescopic positioning rod 404 will be inserted into the positioning hole 202 at the top of the base plate 201, indicating that the two detection assemblies are in the same position. After the external detection box 403 covers the outside of the part, the multiple detection sensors 205 on the external detection box 403 and the internal detection block 204 directly contact the box to collect contour data in real time. The pressure or friction data generated by the contact between the box and the detection sensors 205 indicates that the product is qualified within a certain range, thus improving the convenience of testing.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A fixture for EPP molding, comprising a worktable (1), characterized in that: The workbench (1) is fixedly connected to an external mounting frame (101), and a lower detection component (2) is provided on the top of the workbench (1). An electric guide rail (102) is fixedly connected inside the mounting frame (101), and a connecting plate (103) is slidably connected to the outside of the electric guide rail (102). An upper detection component (4) is provided on the outside of the connecting plate (103), and a limit hole (104) is provided on the top of the workbench (1). The lower detection component (2) includes a substrate (201). The substrate (201) has positioning holes (202) at its four top corners. A plug-in post (203) is fixedly connected to the lower part of the inner wall of the positioning hole (202). The plug-in post (203) is inserted into the inside of the limiting hole (104). An internal detection block (204) is fixedly connected to the top of the substrate (201). A detection sensor (205) is fixedly connected to the outside of the internal detection block (204). The upper detection component (4) includes a mounting plate (401), which is disposed outside the connecting plate (103). An external detection box (403) is fixedly connected to the bottom of the mounting plate (401), and telescopic positioning rods (404) are fixedly connected to the four corners of the bottom of the mounting plate (401). The lower end of the telescopic positioning rod (404) is disposed inside the positioning hole (202).

2. The inspection fixture for EPP molding according to claim 1, characterized in that, An electromagnet (105) is fixedly connected to the top of the workbench (1), and the top of the electromagnet (105) is attached to the bottom of the substrate (201).

3. A gauge for EPP molding according to claim 1, characterized in that, The external detection box (403) is located outside the internal detection block (204), and a plurality of detection sensors (205) are arranged inside the external detection box (403).

4. A gauge for EPP molding according to claim 1, characterized in that, An installation assembly (3) is provided between the mounting plate (401) and the connecting plate (103). The installation assembly (3) includes a fixing block (301) fixedly connected to the outside of the connecting plate (103). A T-slot (302) is provided inside the fixing block (301). A T-slot (402) is fixedly connected to the top of the mounting plate (401). The outside of the T-slot (402) fits into the inside of the T-slot (302).

5. A gauge for EPP molding according to claim 4, characterized in that, A limiting plate (304) is rotatably connected to the opening of the T-slot (302), and a fastener (303) is provided between the limiting plate (304) and the fixing block (301).

6. A gauge for EPP molding according to claim 1, characterized in that, A marking component (5) is provided on the top of the workbench (1). The marking component (5) includes a paint tank (501) fixedly connected to the workbench (1). A paint pump (502) is fixedly connected to the top of the paint tank (501). A delivery pipe (503) is fixedly connected to the output end of the paint pump (502). A nozzle (504) is fixedly connected to the end of the delivery pipe (503) away from the paint pump (502).

7. A fixture for EPP molding according to claim 6, characterized in that, The nozzle (504) is fixedly mounted on the outside of the electric push rod (505), the cylinder of the electric push rod (505) is fixedly connected to the outside of the mounting frame (101), and the electric push rod (505) is located on the outside of the internal detection block (204).

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