Stripping test fixture

Abstract

The invention belongs to the technical field of test jigs, and particularly relates to a stripping test jig which comprises a jig body and a sample to be tested. The first pressing block is connected to the jig base and is used for pressing the hard rubber section after the sample to be tested is stripped; the second pressing block is connected to the jig base and is used for pressing an unstripped section of the to-be-tested sample; the test fixture is used for clamping the stripped soft rubber section of the to-be-tested sample and pulling the soft rubber section to move upwards; the visual detection system corresponds to a stripping point of the sample to be detected; according to the method, the adhesive force of the bijection plastic product can be effectively confirmed, a basis for stable parameters is provided for forming, a stable process is provided for a mold, meanwhile, potential quality risks of the product are avoided, good economic benefits and recognition of customers are brought, and quality complaints of the customers are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of test fixtures, and in particular relates to a stripping test fixture. Background Art

[0002] In the production and processing of plastic products, the two-color injection molding process has gradually been valued and widely used after years of development. Two-color injection molding is also called double-material injection molding and double-shot injection molding. It is a process technology that uses two plastic materials to mix and inject plastic products. Some of the two materials are different colors, and some are different in hardness and softness, thereby improving the product's aesthetics and assembly performance.

[0003] Two-color plastic products are usually produced and processed using a two-color injection molding machine, which consists of two sets of plasticizing injection devices and mold devices with the same specifications and structural forms. For example, for the processing of two-color plastic products with different hardness and softness, the first injection is performed by the plasticizing injection device, the hard plastic is molded in the molding mold, and then the soft plastic is injected on the hard plastic to form it.

[0004] After plastic products are formed, the problem of soft and hard plastic peeling is prone to occur. In order to avoid excessive product scrap rate, it is very necessary to perform peeling force testing on plastic products. However, there is currently a lack of good solutions for peeling force testing of plastic products.

[0005] In order to solve the above problems, a peeling test fixture is proposed in the present application. Summary of the invention

[0006] In order to solve the above problems existing in the prior art, the present invention provides a peeling test fixture, which has the characteristics of easy use, high test accuracy, easy adjustment and wide application range.

[0007] To achieve the above object, the present invention provides the following technical solution: a peeling test fixture, comprising a fixture body and a sample to be tested, wherein the fixture body comprises:

[0008] Fixture base;

[0009] A first pressing block, the first pressing block is connected to the fixture base and is used to press the hard rubber section of the sample to be tested after being peeled off;

[0010] A second pressing block, the second pressing block is connected to the fixture base and is used to press the unpeeled section of the sample to be tested;

[0011] A test fixture, which is used to clamp the soft rubber section of the sample to be tested after peeling off and to pull the soft rubber section upward;

[0012] A visual inspection system, wherein the visual inspection system corresponds to the peeling point of the sample to be tested.

[0013] As a preferred technical solution of the present invention, it also includes:

[0014] An adjusting slide seat, having an adjusting slot on the fixture base, the adjusting slide seat being located in the adjusting slot, and the second pressing block being mounted on the adjusting slide seat;

[0015] An adjusting screw is rotatably mounted in the adjusting groove, and the adjusting screw passes through the adjusting slide and is connected to the adjusting slide by threaded engagement.

[0016] As a preferred technical solution of the present invention, it also includes:

[0017] A No. 2 handle, one end of the adjusting screw extends out of the fixture base, and the No. 2 handle is fixed on the extending end of the adjusting screw.

[0018] As a preferred technical solution of the present invention, it also includes:

[0019] A No. 2 guide rod, two of which are symmetrically fixed in the adjustment slot, and the No. 2 guide rods penetrate the adjustment slide.

[0020] As a preferred technical solution of the present invention, it also includes:

[0021] Threaded columns, two symmetrically distributed threaded columns are fixed on the top surfaces of the fixture base and the adjustment slide, and the threaded columns penetrate the first pressing block and the second pressing block;

[0022] A butterfly nut is installed on the protruding end of the threaded column by screwing.

[0023] As a preferred technical solution of the present invention, the test fixture comprises:

[0024] n-type frame;

[0025] A clamping plate, the clamping plate is located in the n-type frame;

[0026] A threaded screw rod, wherein the threaded screw rod is installed on the vertical portion of the n-shaped frame by means of a threaded screwing method, and one end of the threaded screw rod passes through the vertical portion of the n-shaped frame and is rotatably connected to the clamping plate;

[0027] A handle No. 1 is fixed to an end of the threaded screw away from the clamping plate.

[0028] As a preferred technical solution of the present invention, it also includes:

[0029] A No. 1 guide rod, two of which are symmetrically fixed on the clamping plate, and the No. 1 guide rod passes through the vertical portion of the n-type frame.

[0030] As a preferred technical solution of the present invention, it also includes:

[0031] A frame, on which the fixture body is fixed;

[0032] A lifting beam, the lifting beam is located above the frame, and the test fixture is fixed to the bottom surface of the lifting beam;

[0033] Z-axis linear modules, two of which are symmetrically fixed on the frame, and the Z-axis linear modules drive the lifting beam to move up and down.

[0034] As a preferred technical solution of the present invention, the Z-axis linear module includes:

[0035] A longitudinal guide rail, the longitudinal guide rail is fixed on the frame and has a guide slot;

[0036] A guide slider, the guide slider is located in the guide slot, and the lifting beam is fixedly connected to the guide slider;

[0037] A longitudinal screw rod, which is rotatably mounted in the longitudinal guide rail and passes through the guide slider and is connected to the guide slider by screwing;

[0038] A driving motor is fixed to the top end of the longitudinal guide rail and is used to drive the longitudinal screw rod to rotate.

[0039] As a preferred technical solution of the present invention, the visual inspection system includes:

[0040] A fixing seat, the fixing seat being fixed on the frame;

[0041] A CCD camera, wherein the CCD camera is fixed on the fixing seat by a camera bracket;

[0042] An annular light source is fixed on the fixing seat by a light source bracket.

[0043] A test method for a peeling test fixture:

[0044] Step 1: Sample preparation: Cut the sample to be tested to a suitable size, and peel off the soft and hard glue of the sample to be tested to a certain length in advance. The hard glue part after peeling is temporarily designated as segment D, the soft glue part after peeling is designated as segment F, the unpeeled part is designated as segment E, and the combination position of the soft and hard glue is designated as the test starting point G;

[0045] Step 2: Fix the sample, press the sample section D with the first pressing block, press the sample section E with the second pressing block, and clamp the sample section F with the test fixture;

[0046] Step 3: Align the sample. Use the alignment block to confirm whether the E section is vertical and whether the first and second pressing blocks are vertical to the pressing surfaces of the test fixture. If they are vertical, proceed to step 4. If not, repeat step 2 to adjust the position of the sample to be tested.

[0047] Step 4: Sample testing, start the Z-axis linear module to raise the test fixture, pull the sample F segment up through the test fixture, collect the image information of the test starting point G through the visual inspection system, gradually increase the pulling force, and observe whether there is peeling, until segment F and segment D are peeled or broken.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] The present invention can effectively confirm the adhesion of double-shot plastic products, provide a basis for stable parameters for molding, and provide a stable process for the mold. At the same time, the present invention will also avoid potential quality risks of the product, bring good economic benefits and customer recognition, and avoid customer quality complaints.

[0050] Other additional advantages and beneficial effects of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0052] Figure 1 It is a structural schematic diagram of the present invention;

[0053] Figure 2 It is a schematic diagram of the isometric structure of the sample to be tested in the present invention;

[0054] Figure 3 It is a schematic diagram of the axonometric structure of the present invention;

[0055] Figure 4 It is a schematic diagram of the isometric structure of the Z-axis linear module in the present invention;

[0056] Figure 5 It is a schematic diagram of the axonometric structure of the visual inspection system in the present invention.

[0057] In the figure: 1. fixture body; 11. fixture base; 111. adjustment slot; 2. first pressure block; 3. second pressure block; 4. test fixture; 41. n-type frame; 42. clamping plate; 421. guide rod No. 1; 43. threaded screw; 431. handle No. 1; 5. sample to be tested; 6. threaded column; 7. butterfly nut; 8. adjustment slide; 9. adjustment screw; 91. handle No. 2; 10. guide rod No. 2; 12. frame; 13. lifting beam; 14. Z-axis linear module; 141. longitudinal guide rail; 1411. guide slide; 142. guide slide; 143. longitudinal screw; 144. drive motor; 15. visual inspection system; 151. fixed seat; 152. camera bracket; 153. CCD camera; 154. light source bracket; 155. ring light source; 16. straightening block. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] See also Figure 1-Figure 5 The present invention provides the following technical solution: a peeling test fixture, including a fixture body 1 and a sample to be tested 5, the fixture body 1 includes: a fixture base 11, a first pressing block 2, a second pressing block 3, a test fixture 4 and a visual inspection system 15.

[0060] Further, by Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the first pressing block 2 is connected to the fixture base 11, and is used to press the hard rubber section of the sample 5 to be tested after peeling. The second pressing block 3 is connected to the fixture base 11, and is used to press the unpeeled section of the sample 5 to be tested. The test fixture 4 is used to clamp the soft rubber section of the sample 5 to be tested after peeling, and is used to pull the soft rubber section upward. The visual inspection system 15 corresponds to the peeling point of the sample 5 to be tested. After adopting the above scheme, when in use, the visual inspection system 15 is connected to the microcomputer display. Before testing, the soft and hard rubber of the sample 5 to be tested are pre-peeled to a certain length, with emphasis on reference. Figure 2 In the state shown, the hard glue part after peeling is temporarily defined as segment D, the soft glue part after peeling is segment F, the unpeeled part is segment E, and the combination position of the soft and hard glue is the test starting point G. The sample segment D is pressed by the first pressing block 2, the sample segment E is pressed by the second pressing block 3, and the sample segment F is clamped by the test fixture 4. The test fixture 4 pulls segment F upward to realize the test.

[0061] Preferably, by Figure 1As shown, in this embodiment, it also includes: an adjustment slide 8 and an adjustment screw 9. An adjustment groove 111 is provided on the fixture base 11. The adjustment slide 8 is located in the adjustment groove 111, and the second pressure block 3 is installed on the adjustment slide 8. The adjustment screw 9 is rotatably installed in the adjustment groove 111, and the adjustment screw 9 passes through the adjustment slide 8 and is connected to the adjustment slide 8 by threaded engagement. Because it is necessary to ensure that segment F is in a vertical state during the test, if segment F is skewed, segment F needs to be straightened. At this time, the position of the test starting point G will also change. In order to make a certain distance between the test starting point G and the second pressure block 3 to avoid affecting the peeling of the soft and hard glue, and at the same time the spacing is not too large, it is necessary to rotate the adjustment screw 9 to make the adjustment slide 8 move horizontally under the action of the thread engagement to change the position of the second pressure block 3.

[0062] It should be noted that the first pressing block 2 is exactly the same as the second pressing block 3. Because during the test, segment F is peeled off in the direction of the second pressing block 3, the invented test fixture can adjust the position of the second pressing block 3. Therefore, when clamping the sample 5 to be tested, special attention should be paid to the clamping direction, and segment E should be compressed using the second pressing block 3.

[0063] Preferably, by Figure 1 As shown, in this embodiment, it also includes: a No. 2 handle 91, one end of the adjustment screw 9 extends out of the fixture base 11, and the No. 2 handle 91 is fixed to the extended end of the adjustment screw 9. The adjustment screw 9 is easy to rotate by setting the No. 2 handle 91.

[0064] Preferably, by Figure 1 As shown, in this embodiment, it also includes: a No. 2 guide rod 10, two No. 2 guide rods 10 are symmetrically fixed in the adjustment groove 111, and the No. 2 guide rod 10 passes through the adjustment slide 8. The two No. 2 guide rods 10 are used to guide the adjustment slide 8 to improve the stability of the adjustment slide 8.

[0065] Optionally, by Figure 1 As shown, in this embodiment, it also includes: a threaded column 6 and a butterfly nut 7. Two symmetrically distributed threaded columns 6 are fixed on the top surfaces of the fixture base 11 and the adjustment slide 8, and the threaded column 6 passes through the first pressing block 2 and the second pressing block 3. The butterfly nut 7 is installed on the protruding end of the threaded column 6 by threaded engagement. After adopting the above scheme, when in use, the D section is placed under the first pressing block 2, and the E section is placed under the second pressing block 3. Then, the butterfly nut 7 is tightened, so that the first pressing block 2 can press the D section of the sample to be tested 5, and the second pressing block 3 can press the E section of the sample to be tested 5.

[0066] Optionally, by Figure 1As shown, in this embodiment, the test fixture 4 includes: an n-shaped frame 41, a clamping plate 42, a threaded screw 43 and a handle 431. The clamping plate 42 is located in the n-shaped frame 41, and the threaded screw 43 is installed on the vertical part of the n-shaped frame 41 by threaded engagement, and one end of the threaded screw 43 passes through the vertical part of the n-shaped frame 41 and is rotatably connected to the clamping plate 42. The handle 431 is fixed to the end of the threaded screw 43 away from the clamping plate 42. After adopting the above scheme, when in use, the F section of the sample 5 to be tested is placed on the inner side of the n-shaped frame 41, and then the threaded screw 43 is rotated by the handle 431, so that the threaded screw 43 pushes the clamping plate 42 to move under the action of threaded engagement, and the clamping plate 42 cooperates with the n-shaped frame 41 to clamp the F section of the sample 5 to be tested.

[0067] Preferably, by Figure 1 As shown, in this embodiment, it also includes: a No. 1 guide rod 421, two No. 1 guide rods 421 are symmetrically fixed on the clamp plate 42, and the No. 1 guide rod 421 passes through the vertical part of the n-type frame 41. The two No. 1 guide rods 421 are used to guide the clamp plate 42 to improve the stability of the clamp plate 42.

[0068] Optionally, by Figure 1 and Figure 3 As shown, in this embodiment, it also includes: a frame 12, a lifting beam 13 and a Z-axis linear module 14. The fixture body 1 is fixed on the frame 12, the lifting beam 13 is located above the frame 12, the test fixture 4 is fixed to the bottom surface of the lifting beam 13, and the two Z-axis linear modules 14 are symmetrically fixed on the frame 12, and the Z-axis linear module 14 drives the lifting beam 13 to rise and fall. After adopting the above scheme, when the sample 5 to be tested is clamped and straightened, the Z-axis linear module 14 is started to drive the lifting beam 13 to rise, and the F section of the sample 5 to be tested is pulled up by the test fixture 4 until the F section and the D section are peeled off or broken.

[0069] Optionally, by Figure 1 , Figure 3 and Figure 4As shown, in this embodiment, the Z-axis linear module 14 includes: a longitudinal guide rail 141, a guide slider 142, a longitudinal screw rod 143 and a drive motor 144. The longitudinal guide rail 141 is fixed on the frame 12, and has a guide slide groove 1411 on the longitudinal guide rail 141. The guide slider 142 is located in the guide slide groove 1411. The lifting beam 13 is fixedly connected to the guide slider 142, and the longitudinal screw rod 143 is rotatably installed in the longitudinal guide rail 141. The longitudinal screw rod 143 penetrates the guide slider 142 and is connected to the guide slider 142 by threaded engagement. The drive motor 144 is fixed to the top of the longitudinal guide rail 141 to drive the longitudinal screw rod 143 to rotate. After adopting the above scheme, when in use, start the drive motor 144 to drive the longitudinal screw rod 143 to rotate. Under the action of the threaded engagement, the lifting beam 13 is driven to rise and fall through the guide slider 142.

[0070] Optionally, by Figure 1 , Figure 3 and Figure 5 As shown, in this embodiment, the visual inspection system 15 includes: a fixed base 151, a CCD camera 153 and an annular light source 155. The fixed base 151 is fixed on the frame 12, the CCD camera 153 is fixed on the fixed base 151 by using a camera bracket 152, and the annular light source 155 is fixed on the fixed base 151 by using a light source bracket 154. After adopting the above scheme, when in use, the CCD camera 153 is connected to the microcomputer display, and the image information of the test starting point G is captured by the CCD camera 153 and transmitted to the microcomputer display. Through the microcomputer display, the position change of the test starting point G can be intuitively grasped, which is convenient for observing whether segment F and segment D are peeled off or broken.

[0071] The circuit connection involved in the present invention is a common method used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments, and it belongs to the widely used existing technology.

[0072] Components not described in detail herein are prior art.

[0073] The working principle and use process of the present invention:

[0074] Test method of peel test fixture:

[0075] Step 1: Sample preparation: Cut the sample 5 to be tested to a suitable size, and peel off the soft and hard plastic of the sample 5 to be tested to a certain length in advance. The hard plastic part after peeling is temporarily designated as segment D, the soft plastic part after peeling is designated as segment F, the unpeeled part is designated as segment E, and the joint position of the soft and hard plastic is designated as the test starting point G;

[0076] Step 2: Fix the sample, press the sample section D with the first pressing block 2, press the sample section E with the second pressing block 3, and clamp the sample section F with the test fixture 4;

[0077] Step 3: Align the sample. Use the alignment block 16 to confirm whether the E section is vertical and whether the pressing surfaces of the first pressing block 2 and the second pressing block 3 and the test fixture 4 are vertical. If they are vertical, proceed to step 4. If they are not vertical, repeat step 2 to adjust the position of the sample 5 to be tested. The alignment block 16 is a rectangular parallelepiped structure. When not in use, the alignment block 16 can be directly placed on the rack 12 or other convenient locations.

[0078] Step 4: Sample testing, start the Z-axis linear module 14 to raise the test fixture 4, pull the sample F segment up through the test fixture 4, collect the image information of the test starting point G through the visual inspection system 15, gradually increase the pulling force, and observe whether there is peeling, until segment F and segment D are peeled or broken.

[0079] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A peeling test fixture, comprising a fixture body (1) and a sample to be tested (5), characterized in that: The fixture body (1) includes: A fixture base (11); A first pressing block (2), the first pressing block (2) being connected to the fixture base (11) and used for pressing the hard rubber section of the sample to be tested (5) after peeling; A second pressing block (3), the second pressing block (3) being connected to the fixture base (11) and used for pressing the unpeeled section of the sample to be tested (5); A test fixture (4), the test fixture (4) is used to clamp the soft rubber section of the sample to be tested (5) after peeling, and to pull the soft rubber section upward; A visual inspection system (15), wherein the visual inspection system (15) corresponds to the peeling point of the sample to be tested (5).

2. The peeling test fixture according to claim 1, characterized in that: Also includes: An adjusting slide (8) having an adjusting groove (111) on the fixture base (11), the adjusting slide (8) being located in the adjusting groove (111), and the second pressing block (3) being mounted on the adjusting slide (8); An adjusting screw (9) is rotatably mounted in the adjusting groove (111), and the adjusting screw (9) passes through the adjusting slide seat (8) and is connected to the adjusting slide seat (8) by means of a threaded engagement.

3. The peeling test fixture according to claim 2, characterized in that: Also includes: A No. 2 handle (91), one end of the adjusting screw (9) extends out of the fixture base (11), and the No. 2 handle (91) is fixed to the extended end of the adjusting screw (9).

4. The peeling test fixture according to claim 2, characterized in that: Also includes: A second guide rod (10), two of the second guide rods (10) are symmetrically fixed in the adjustment slot (111), and the second guide rods (10) penetrate the adjustment slide seat (8).

5. The peeling test fixture according to claim 2, characterized in that: Also includes: Threaded columns (6), two symmetrically distributed threaded columns (6) are fixed on the top surfaces of the fixture base (11) and the adjustment slide (8), and the threaded columns (6) penetrate the first pressing block (2) and the second pressing block (3); A butterfly nut (7) is installed on the protruding end of the threaded column (6) by screwing.

6. The peeling test fixture according to claim 1, characterized in that: The test fixture (4) comprises: n-type frame (41); A clamping plate (42), wherein the clamping plate (42) is located inside the n-shaped frame (41); A threaded screw (43), wherein the threaded screw (43) is installed on the vertical portion of the n-shaped frame (41) by means of a threaded engagement, and one end of the threaded screw (43) penetrates through the vertical portion of the n-shaped frame (41) and is rotatably connected to the clamping plate (42); A handle (431) is fixed to an end of the threaded screw (43) away from the clamping plate (42).

7. The peeling test fixture according to claim 6, characterized in that: Also includes: A number one guide rod (421), two of the number one guide rods (421) are symmetrically fixed on the clamping plate (42), and the number one guide rods (421) penetrate the vertical portion of the n-shaped frame (41).

8. The peeling test fixture according to claim 1, characterized in that: Also includes: A frame (12), the fixture body (1) being fixed on the frame (12); A lifting beam (13), the lifting beam (13) being located above the frame (12), and the test fixture (4) being fixed to the bottom surface of the lifting beam (13); Z-axis linear modules (14), two Z-axis linear modules (14) are symmetrically fixed on the frame (12), and the Z-axis linear modules (14) drive the lifting beam (13) to rise and fall.

9. The peeling test fixture according to claim 8, characterized in that: The Z-axis linear module (14) comprises: A longitudinal guide rail (141), wherein the longitudinal guide rail (141) is fixed on the frame (12), and a guide slot (1411) is provided on the longitudinal guide rail (141); A guide slider (142), the guide slider (142) is located in the guide slot (1411), and the lifting beam (13) is fixedly connected to the guide slider (142); A longitudinal screw rod (143), wherein the longitudinal screw rod (143) is rotatably mounted in the longitudinal guide rail (141), and the longitudinal screw rod (143) passes through the guide slider (142) and is connected to the guide slider (142) by means of a threaded engagement; A driving motor (144) is fixed to the top end of the longitudinal guide rail (141) and is used to drive the longitudinal screw rod (143) to rotate.

10. The peeling test fixture according to claim 8, characterized in that: The visual inspection system (15) comprises: A fixing seat (151), wherein the fixing seat (151) is fixed on the frame (12); A CCD camera (153), wherein the CCD camera (153) is fixed on the fixing seat (151) by means of a camera bracket (152); An annular light source (155), wherein the annular light source (155) is fixed on the fixing seat (151) by means of a light source bracket (154).

Images