CN216349907U - Demoulding performance testing device - Google Patents
Demoulding performance testing device Download PDFInfo
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- CN216349907U CN216349907U CN202122335073.4U CN202122335073U CN216349907U CN 216349907 U CN216349907 U CN 216349907U CN 202122335073 U CN202122335073 U CN 202122335073U CN 216349907 U CN216349907 U CN 216349907U
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Abstract
The utility model provides a demoulding performance testing device, which belongs to the field of performance testing equipment and comprises: the device comprises a hollow pipe, a clamp I and a clamp II, wherein the hollow pipe is used for allowing soaked glass fibers to penetrate through and form a glass fiber reinforced plastic profile so as to simulate a pultrusion die; the fixture I and the fixture II are respectively used for clamping the hollow tube and the glass fiber reinforced plastic section, and the fixture I and the fixture II can be connected with a testing machine to measure the drawing strength. When the device is used, the soaked glass fiber is arranged in the hollow pipe in a penetrating mode, then the glass fiber is heated and solidified to form the glass fiber reinforced plastic section, then the glass fiber reinforced plastic section and the hollow pipe are respectively clamped by the clamp I and the clamp II, the drawing strength is tested by the testing machine, and the demolding performance can be evaluated according to the drawing strength.
Description
Technical Field
The utility model belongs to the field of performance test equipment, and particularly relates to a demolding performance test device.
Background
The pultrusion process is a special process in the glass fiber reinforced plastic molding process, and is suitable for producing glass fiber reinforced plastic profiles with various section shapes, such as bars, pipes, solid profiles (I-shaped, groove-shaped and square profiles), hollow profiles and the like. The process has the advantages of continuous production process, stable quality, high glass fiber content, high strength, low equipment investment, labor saving and the like, and is rapidly developed in recent years.
In the production process of the pultrusion process, the problem which has the greatest influence on the production process is the mold blocking phenomenon, which often causes the product to be broken or the mold to be damaged and shut down, and the product quality and the production efficiency of pultrusion production are seriously influenced, so that the excellent demolding effect is the main condition for ensuring the pultrusion process to be smoothly carried out. The demolding effect is influenced by a plurality of factors, such as the precipitation of the demolding agent, the fiber amount, the resin gel curing condition, the filler addition amount and the like, so that a great deal of work is required for evaluating the demolding effect.
In the past, the demolding effect evaluation is mainly based on the machine experiment, namely, the demolding effect is evaluated by observing the changes of the traction force and the product quality according to production parameters in actual production by using pultrusion equipment in actual production. The method is time-consuming and labor-consuming, delays the production progress, cannot meet the requirement of the demolding performance evaluation work when the quantity is large, and often damages the mold if the film blocking condition occurs, thus causing resource waste.
SUMMERY OF THE UTILITY MODEL
Based on the above background problems, the present invention is directed to provide a device for testing mold release performance, which has a test result similar to that of a machine test, and at the same time, has the advantages of simple operation and high repeatability.
In order to achieve the purpose, the technical scheme provided by the utility model is as follows:
demolding performance testing apparatus comprising:
the hollow tube is used for enabling the soaked glass fiber to penetrate through and form a glass fiber reinforced plastic section so as to simulate a pultrusion die;
and the clamp I and the clamp II are respectively used for clamping the hollow tube and the glass fiber reinforced plastic section, and the clamp I and the clamp II can be connected with a testing machine to measure the drawing strength.
Further, the clamp I includes:
the traction arm is used for being connected with the testing machine;
the clamping parts are arranged in pairs in opposite mode and are movably connected with the traction arm;
the clamp II has the same structure as the clamp I.
Still further, the trailing arm includes:
the supporting rods are at least provided with two groups and correspond to the clamping parts one by one, and the clamping parts are movably arranged on the supporting rods;
the connecting rod is connected in the multiunit the tip of branch for be connected with the testing machine.
Still further, the clamping portion includes:
the screw is in threaded connection with the traction arm;
and the clamping head is fixedly connected with the end part of the screw rod and is used for being abutted against the hollow pipe or the glass fiber reinforced plastic section.
Furthermore, the surface of the clamping head on the side far away from the screw rod is a rough surface.
Further, the demolding performance testing apparatus further includes:
and the heat-shrinkable sleeve is movably sleeved on the hollow tube and is used for binding the infiltrated glass fiber penetrating out of the hollow tube.
Further, the heat shrinkage multiplying power of the heat-shrinkable tubing is 2: 1.
Furthermore, the material of the heat shrinkable sleeve is PTFE or FEP.
Furthermore, the hollow tube is made of one of carbon structural steel, low alloy steel, alloy steel and stainless acid-resistant steel.
Compared with the prior art, the utility model has the following effects:
1. the demolding performance testing device comprises a hollow pipe, a clamp I and a clamp II, when in use, the soaked glass fiber is arranged in the hollow pipe in a penetrating mode, then the glass fiber is heated and solidified to form a glass fiber reinforced plastic section, then the glass fiber reinforced plastic section and the hollow pipe are respectively clamped by the clamp I and the clamp II, the test of the drawing strength is carried out through a testing machine, and the demolding performance can be evaluated according to the drawing strength.
2. The demoulding performance test device utilizes the hollow tube to simulate the pultrusion die, can simulate the actual working condition of the composite material pultrusion production process to the maximum extent in a laboratory or a production line through the complete process of threading, gum dipping, pultrusion and curing similar to the actual pultrusion working condition, obtains the demoulding evaluation which is closest to the actual production, and has good repeatability, small dispersion of the drawing test data required by the evaluation and high reliability of the demoulding evaluation result.
3. The demoulding performance testing device also comprises a heat-shrinkable sleeve, wherein the heat-shrinkable sleeve is sleeved on the hollow tube when in use, then the heat-shrinkable sleeve can form constraint on the glass fiber penetrating out of the hollow tube due to the heat-shrinkable property in the heating and curing process, the glass fiber reinforced plastic section can be formed after the heat-shrinkable sleeve is removed after curing, and the arrangement of the heat-shrinkable sleeve ensures that the glass fiber penetrating out of the hollow tube can be effectively cured and molded.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic structural view of a device for testing mold release properties in example 1 of the present invention;
fig. 2 is a schematic structural view of a mold release performance testing apparatus in example 2 of the present invention (excluding the jig I and the jig II).
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings of the specification, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Example 1
In order to solve the problem of the existing on-line mold release performance testing, the embodiment provides a mold release performance testing apparatus, which has an evaluation result similar to that of the on-machine test evaluation, and is simple to operate and high in repeatability.
As shown in fig. 1, the mold release performance testing apparatus includes a hollow tube 1, a jig I2, and a jig II 3.
In the embodiment, the hollow tube 1 is used for the infiltrated glass fiber to penetrate through, and then is heated and cured, so that the glass fiber can form the glass fiber reinforced plastic profile 100.
Specifically, the material of the hollow tube 1 of the present embodiment may be carbon structural steel, low alloy steel, stainless acid-resistant steel, so as to ensure that the hollow tube 1 can be used under heating conditions; the outer section of the hollow tube 1 is circular, the size can be adjusted within 1.0-5.0cm, the inner section can be circular or square, and the embodiment is not limited in particular; the wall thickness of the hollow tube can be adjusted within the range of 0.1-1.0cm, and the length of the hollow tube can be adjusted within the range of 20.0-80.0cm, but it should be noted that the size of the hollow tube 1 is not limited to the above exemplary range, and it can be adjusted according to actual needs.
In the present embodiment, the clamps I2 and II 3 are used for clamping the hollow tube 1 and the glass fiber reinforced plastic profile 100, respectively, so as to perform the drawing strength test under the action of the testing machine.
Specifically, the structure of the clamp I2 and the clamp II 3 of the present embodiment is the same, and the clamp I2 will be described in detail as an example.
As shown in figure 1, the clamp I2 comprises a traction arm and a clamping part, the traction arm is used for being connected with the testing machine, and the clamping part is used for clamping the glass fiber reinforced plastic section.
Specifically, the traction arm comprises a support rod I201, a support rod II 202 and a connecting rod 203, wherein the support rod I201 and the support rod II 202 are arranged oppositely, and the connecting rod 203 is connected to the top ends of the support rod I201 and the support rod II 202.
The connecting rod 203 of the present embodiment is an arc-shaped rod, but is not limited thereto, and in other embodiments, the connecting rod 203 may also be a straight rod or a triangular rod.
Specifically, the clamping part is equipped with two sets ofly, is clamping part I and clamping part II respectively, and clamping part I swing joint is on branch I201, and clamping part II swing joint is on branch II 202, clamping part and branch one-to-one promptly.
Clamping part I and clamping part II set up relatively, and have the same structure to clamping part I is the example, and it comprises screw rod 204 and clamping head 205, the axial of screw rod 204 is perpendicular with branch I201's extending direction, just screw rod 204 spiro union is in on the branch I201, clamping head 205 is fixed the tip of screw rod 204 for with glass steel section bar 100 butt, after rotating screw rod 204 to clamping head 205 and pressing from both sides glass steel section bar 100 tightly, the accessible nut is fastened screw rod 204.
In order to ensure the clamping stability, the surface of the clamping head 205 is rough, and specifically, a plurality of protrusions or stripes may be disposed on the surface of the clamping head 205 to increase the friction force.
Therefore, in the embodiment, the clamping of the glass fiber reinforced plastic section bar 100 is realized through the matching of the clamping part I and the clamping part II, and the clamping of the hollow tube 1 is the same.
The working principle of the embodiment is as follows:
penetrating the glass fiber soaked with the resin into the hollow tube 1, and then putting the whole body into an oven for heating and curing, wherein the curing temperature is 160 ℃, and the curing time is 2 hours;
after heating and curing, the glass fiber reinforced plastic profile 100 can be formed, then the glass fiber reinforced plastic profile at the lower end of the hollow tube 1 is cut, polished and removed to be flush with the lower end of the hollow tube 1, then the glass fiber reinforced plastic profile 100 is clamped by a clamp I2, the hollow tube 1 is clamped by a clamp II 3, and the hollow tube 1 is placed on a universal testing machine to measure the drawing strength, wherein the smaller the drawing strength is, the better the demolding performance is; conversely, the worse.
Example 2
The demolding performance testing device is different from the demolding performance testing device in embodiment 1, and the demolding performance testing device further comprises a heat-shrinkable sleeve 4, as shown in fig. 2, wherein the heat-shrinkable sleeve 4 is movably sleeved on the hollow tube 1 and is used for binding the infiltrated glass fiber penetrating out of the hollow tube 1.
Specifically, the heat-shrinkable ratio of the heat-shrinkable sleeve 4 is 2:1, so that the heat-shrinkable sleeve 4 can restrain the glass fiber penetrating out of the hollow tube 1 due to the heat-shrinkable property during heating and curing, and the curing and molding of the hollow tube are guaranteed. In practical applications, the material of the heat shrinkable sleeve 4 may be PTFE or FEP, and this embodiment is not particularly limited. In addition, the size of the heat shrinkable sleeve 4 may be determined according to the size of the center tube 1.
The working principle of the embodiment is as follows:
sleeving a heat-shrinkable sleeve 4 at the upper end of the central tube 1, wrapping the upper end of the central tube 1, and extending the heat-shrinkable sleeve 4 out of the central tube 1 by about 20 cm;
penetrating the glass fiber soaked with the resin into the hollow tube 1, and then putting the whole body into an oven for heating and curing, wherein the curing temperature is 160 ℃, and the curing time is 2 hours;
after heating and curing, removing the heat-shrinkable sleeve 4 to form the glass fiber reinforced plastic profile 100, then cutting, polishing and removing the glass fiber reinforced plastic profile at the lower end of the hollow tube 1 to enable the glass fiber reinforced plastic profile to be flush with the lower end of the hollow tube 1, then clamping the glass fiber reinforced plastic profile 100 by using a clamp I2, clamping the hollow tube 1 by using a clamp II 3, and placing the hollow tube 1 on a universal testing machine to measure the drawing strength, wherein the smaller the drawing strength is, the better the demolding performance is; conversely, the worse.
It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.
Claims (9)
1. Demolding performance test device, its characterized in that includes:
the hollow tube is used for enabling the soaked glass fiber to penetrate through and form a glass fiber reinforced plastic section so as to simulate a pultrusion die;
and the clamp I and the clamp II are respectively used for clamping the hollow tube and the glass fiber reinforced plastic section, and the clamp I and the clamp II can be connected with a testing machine to measure the drawing strength.
2. The apparatus for testing mold release performance according to claim 1, wherein the jig I includes:
the traction arm is used for being connected with the testing machine;
the clamping parts are arranged in pairs in opposite mode and are movably connected with the traction arm;
the clamp II has the same structure as the clamp I.
3. The demold performance testing apparatus of claim 2, wherein said pulling arm comprises:
the supporting rods are at least provided with two groups and correspond to the clamping parts one by one, and the clamping parts are movably arranged on the supporting rods;
the connecting rod is connected in the multiunit the tip of branch for be connected with the testing machine.
4. The mold release performance test apparatus according to claim 2, wherein the clamp portion includes:
the screw is in threaded connection with the traction arm;
and the clamping head is fixedly connected with the end part of the screw rod and is used for being abutted against the hollow pipe or the glass fiber reinforced plastic section.
5. The apparatus for testing mold release properties according to claim 4, wherein the surface of the holding head on the side away from the screw is roughened.
6. The mold release performance testing apparatus according to claim 1, further comprising:
and the heat-shrinkable sleeve is movably sleeved on the hollow tube and is used for binding the infiltrated glass fiber penetrating out of the hollow tube.
7. The apparatus for testing mold release property according to claim 6, wherein the heat shrinkage ratio of the heat shrinkable tube is 2: 1.
8. The apparatus for testing mold release performance of claim 6, wherein the heat shrinkable sleeve is made of PTFE or FEP.
9. The apparatus for testing mold release performance of claim 1, wherein the hollow tube is made of one of carbon structural steel, low alloy steel, and stainless acid-proof steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122335073.4U CN216349907U (en) | 2021-09-26 | 2021-09-26 | Demoulding performance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122335073.4U CN216349907U (en) | 2021-09-26 | 2021-09-26 | Demoulding performance testing device |
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| Publication Number | Publication Date |
|---|---|
| CN216349907U true CN216349907U (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122335073.4U Active CN216349907U (en) | 2021-09-26 | 2021-09-26 | Demoulding performance testing device |
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| CN (1) | CN216349907U (en) |
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2021
- 2021-09-26 CN CN202122335073.4U patent/CN216349907U/en active Active
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