Polyurethane physical property sample mold

Abstract

The utility model discloses a polyurethane physical property sample mould, which relates to the technical field of polyurethane physical property sample preparation and comprises a bottom plate, a guide plate, a cavity plate and a stop dog, the guide plate is detachably arranged on the bottom plate, a cavity groove is formed between the guide plate and the bottom plate, and the stop dog is arranged in the cavity groove. The mold cavity plate is arranged in the mold cavity groove in a drawable mode and can slide on the bottom plate, the check block is arranged at one end of the mold cavity plate, and a plurality of mold holes in different shapes are formed in the bottom wall of the mold cavity plate. According to the utility model, through the arrangement of the bottom plate, the guide plate, the cavity plate and the stop block, a plurality of different types of physical property samples can be simultaneously manufactured at one time, all the samples are formed at one time, machining is not needed, the sizes and shapes of the samples are accurate, and the surfaces of the samples are smooth, so that accurate physical property data of the polyurethane material can be obtained during testing.

Description

TECHNICAL FIELD

[0001] The utility model relates to polyurethane physical sample preparation technical field, especially polyurethane physical sample mould. BACKGROUND

[0002] The cast polyurethane material is widely used in the production of polyurethane solid roller and other products due to its excellent physical properties. Developing different cast polyurethane material formulas and testing the physical properties of polyurethane materials in the production process of polyurethane products requires the preparation of physical samples.

[0003] In the currently disclosed devices or methods for preparing polyurethane physical samples, thin sheet-shaped test samples (such as samples for testing tensile strength and tear strength) are usually made into sheets of polyurethane material, which are then cut with a cutting knife. Columnar or block-shaped test samples (such as samples for testing wear, hardness, and compression set) are usually made by molding with a mold and supplemented by mechanical processing. When cutting test samples from sheets with a cutting knife, the side surface in the thickness direction of the test sample is not perpendicular to the surface of the sheet, and factors such as dull cutting tool edges and tooling can also cause the shape of the cut test piece to be irregular, resulting in inaccurate test results. Block-shaped or columnar test samples molded with a mold are difficult to clamp during mechanical processing, and due to the high elasticity of polyurethane materials, the dimensional accuracy of the processed test samples is not high, making it difficult to achieve high surface finish.

[0004] In addition, the prior art CN217257753U also discloses a polyurethane compression sample pouring device, but this prior art still has the following technical defects: 1. When the product is demolded, multiple pieces are stacked and pressed out with a tool. Since the strength of polyurethane is very low during demolding, the upper several products need to pass through multiple mold cavities to be demolded, and the test sample is easily damaged; 2. This device is not suitable for making thin sheet-shaped test samples because the processing technology for making thin sheet-shaped combs is poor, and the combs are easily deformed, damaged, and broken. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a polyurethane physical sample mold for solving the above technical problems.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] A polyurethane physical sample mold, comprising a bottom plate, a guide plate, a cavity plate, and a stop block, the guide plate is detachably arranged on the bottom plate, a cavity groove is formed between the guide plate and the bottom plate, the cavity plate is pullably arranged in the cavity groove and can slide on the bottom plate, one end of the cavity plate is provided with the stop block, and a plurality of cavities of different shapes are formed in the bottom wall of the cavity plate.

[0008] As preferred, a handle is further included, and the block is provided with the handle away from one end of the cavity plate.

[0009] As preferred, the upper end of the bottom plate extends upward to form a protruding part on both sides.

[0010] As further preferred, a notch is formed on the protruding part, and the guide plate is detachably installed in the notch through a connecting piece.

[0011] As preferred, the upper end of the cavity plate extends upward to form two limiting parts on both sides.

[0012] As further preferred, the limiting parts are upwardly protruding to form stop steps near one end of the block, and the block is detachably connected with the two stop steps.

[0013] As preferred, a guide plate is further included, and the guide plate is arranged on the inner bottom wall of the cavity plate, a guide groove is formed on the lower side wall of the guide plate, and the guide groove is matched with the guide plate.

[0014] As further preferred, the lower side wall of the guide plate forms a scraper on both sides of the guide groove.

[0015] As preferred, a cavity is formed between the block, the cavity plate and the guide plate.

[0016] A preparation method of a polyurethane physical sample, comprising the polyurethane physical sample mold, characterized in that the preparation method comprises:

[0017] S1, the polyurethane physical sample mold is put into an oven and preheated to a certain temperature, and then taken out from the oven;

[0018] S2, a proper amount of polyurethane raw material is poured into each mold hole of the cavity plate, and the liquid surface of the polyurethane raw material exceeds the upper end of each mold hole;

[0019] S3, the cavity plate is pushed into the cavity groove between the bottom plate and the guide plate until the stop steps of the cavity plate abut against the end face of the guide plate;

[0020] S4, then the polyurethane physical sample mold is placed into the oven, and after the polyurethane raw material is solidified, the polyurethane physical sample mold is taken out from the oven, the cavity plate is pulled out, and the prepared sample and the block-shaped waste material formed by the solidification of the excess polyurethane raw material are taken out from the cavity plate.

[0021] The above technical solution has the following advantages or beneficial effects:

[0022] The utility model discloses, through the bottom plate, guide plate, cavity plate and the setting of stop block, can make different types of physical sample of many simultaneously one-time, all sample one time forming, do not need to carry out mechanical processing again, sample size, shape is accurate, surface smooth, can obtain accurate polyurethane material physical performance data when testing, and the mould whole is sheet shape, the depth and size and shape of internal mould hole can also be set according to need to adapt to different sheet product. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the perspective view of the polyurethane physical sample mould in the utility model;

[0024] Figure 2 It is the plan view of the polyurethane physical sample mould in the utility model;

[0025] Figure 3 It is Figure 2 the sectional view of A-A direction in it;

[0026] Figure 4 It is the schematic view of explosion of the polyurethane physical sample mould in the utility model.

[0027] In the drawing: 1, bottom plate; 2, guide plate; 3, cavity plate; 4, stop block; 5, cavity groove; 6, mould hole; 7, handle; 8, protruding portion; 9, notch; 10, limiting portion; 11, stop step; 12, guide plate; 13, guide groove; 14, scraper. DETAILED DESCRIPTION

[0028] The technical scheme of the utility model will be described below in conjunction with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of protection of the utility model.

[0029] In the description of the utility model, it is necessary to explain that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. appear, the indicated orientation or position relation based on the orientation or position relation shown in the drawing, is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, cannot be understood as the limitation of the utility model. In addition, if the terms "first", "second", "third" appear, only for the description purpose, and cannot be understood as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Figure 1 This is a perspective view of the polyurethane physical property sample mold in this utility model; Figure 2 This is a top view of the polyurethane physical property sample mold in this utility model; Figure 3 yes Figure 2 Sectional view along the middle AA direction; Figure 4 This is an exploded view of the polyurethane physical property sample mold in this utility model. Please refer to [link / reference]. Figures 1 to 4 The image shows a preferred embodiment of a polyurethane property sample mold, comprising a base plate 1, a guide plate 2, a cavity plate 3, and a stop block 4. The guide plate 2 is detachably mounted on the base plate 1, forming a cavity groove 5 between the guide plate 2 and the base plate 1. The cavity plate 3 is retractably mounted within the cavity groove 5 and can slide on the base plate 1. A stop block 4 is provided at one end of the cavity plate 3, and several holes 6 of different shapes are formed on the bottom wall of the cavity plate 3. In this embodiment, see [reference needed]. Figure 4 As shown, a cavity 5 is formed between the base plate 1 and the guide plate 2, and the cavity plate 3 is slidably set in the cavity 5. Different shaped holes 6 are set on the bottom wall of the cavity plate 3, which can simultaneously produce multiple physical property samples of different types. All samples can be formed in one step without further machining. The sample size and shape are accurate, the surface is smooth, and accurate physical property data of polyurethane materials can be obtained during testing.

[0032] A suitable amount of polyurethane raw material is injected into the cavity 6, then the cavity plate 3 is pushed into the cavity groove 5, and then placed in an oven to dry, so that the polyurethane raw material is cured to form a sample.

[0033] Furthermore, as a preferred embodiment, it also includes a handle 7, which is provided at the end of the stop 4 away from the cavity plate 3. The handle 7 is integrally connected to the stop 4, and the handle 7 facilitates the pulling of the cavity plate 3, allowing the cavity plate 3 to smoothly enter or leave the cavity groove 5.

[0034] Furthermore, as a preferred embodiment, the upper sides of the base plate 1 extend upward to form protrusions 8. The two protrusions 8 can serve as limiting parts, facilitating the sliding of the cavity plate 3 along a predetermined trajectory, while also ensuring the stability of the sliding of the cavity plate 3.

[0035] Further, as a preferred embodiment, the protruding part 8 is provided with a slot 9, and the guide plate 2 is detachably installed in the slot 9 through a connecting piece. The slot 9 and the guide plate 2 are matched with each other, so that the two sides of the guide plate 2 are clamped in the slot 9, and then are fixed through the connecting piece, which can be a bolt or a screw. Through the slot 9, the guide plate 2 is positioned, and the guide plate 2 is quickly installed.

[0036] Further, as a preferred embodiment, the upper end of the cavity plate 3 is extended to form two limiting parts 10. The limiting parts 10 are arranged to facilitate the excess polyurethane raw material in the hole 6 to be scraped into the cavity formed between the stop block 4, the cavity plate 3 and the guide plate 2, so as to avoid the overflow of the excess polyurethane raw material.

[0037] Further, as a preferred embodiment, one end of the limiting part 10 close to the stop block 4 is upwardly protruded to form a stop step 11, and the stop block 4 is detachably connected with the two stop steps 11. When the cavity plate 3 slides, the cavity plate 3 enters the cavity groove 5, and at this time, the stop step 11 can abut against the guide plate 2 to limit the position. When the stop step 11 abuts against the guide plate 2, it indicates that the cavity plate 3 has been positioned.

[0038] Further, as a preferred embodiment, a guide plate 12 is further arranged on the inner bottom wall of the cavity plate 3, a guide groove 13 is arranged on the lower side wall of the guide plate 2, and the guide groove 13 is matched with the guide plate 12. As shown in Figure 4 The guide plate 12 is used to guide the sliding of the cavity plate 3, so that the cavity plate 3 can slide more stably and smoothly, and the shaking of the cavity plate 3 during the sliding can be avoided. In addition, the guide plate 12 can increase the friction between the cavity plate 3, so that the cavity plate 3 can be limited by the contact friction between the guide plate 12 and the cavity plate 3 after the cavity plate 3 is moved to the position, and the automatic sliding of the cavity plate 3 can be avoided, and the yield of the sample can be improved.

[0039] Further, as a preferred embodiment, the lower side wall of the guide plate 2 is formed with a scraper 14 on both sides of the guide groove 13. As shown in Figure 4 The excess polyurethane raw material in the hole 6 can be scraped out by the scraper 14, and under the movement of the cavity plate 3, the scraper 14 can scrape the excess polyurethane raw material into the cavity formed between the stop block 4, the cavity plate 3 and the guide plate 2, so as to be collected.

[0040] In use, first, the mold is put into an oven and preheated to a certain temperature, then taken out from the oven, then a proper amount of polyurethane raw material is poured into each mold hole 6 of the cavity plate 3, the liquid surface of the polyurethane raw material exceeds the upper end of each mold hole 6; then the cavity plate 3 is pushed into the cavity groove 5 between the bottom plate 1 and the guide plate 2 until the stop step 11 of the cavity plate 3 abuts against the end face of the guide plate 2. In the process of pushing the cavity plate 3, the excess polyurethane raw material on the upper end of the mold hole 6 is scraped off by the guide plate 2 and accumulated in the cavity formed by the stop block 4, the cavity plate 3 and the guide plate 2. Then the mold is placed into the oven, after the polyurethane raw material is solidified, the mold is taken out from the oven, the cavity plate 3 is pulled out, and the sample prepared and the block-shaped waste material formed by the solidification of the excess polyurethane raw material are taken out from the cavity plate 3.

[0041] The above merely describes the preferred embodiments of the present application, and is not intended to limit the embodiments and the protection scope of the present application. It should be realized by those skilled in the art that any equivalent replacement and obvious change made according to the content of the present application should be included in the protection scope of the present application.

Claims

1. A polyurethane physical property test specimen mold characterized by, The utility model relates to a type cavity plate and the guide plate between the bottom plate form type cavity groove, the type cavity plate can be pulled and is set up in type cavity groove and can slide on the bottom plate, one end of type cavity plate is provided with the block, and the bottom wall of type cavity plate is provided with a plurality of different shape type holes.

2. The polyurethane physical property test specimen mold of claim 1, wherein, Still include handle, one end of the block away from the type cavity plate is provided with the handle.

3. The polyurethane physical property test specimen mold of claim 1, wherein, The upper end of the bottom plate extends upwards to form a protruding part on both sides.

4. The polyurethane physical property test specimen mold of claim 3, wherein, The protruding part is provided with a notch, and the guide plate is detachably installed in the notch through a connecting piece.

5. The polyurethane physical property test specimen mold of claim 1, wherein, The upper end of the type cavity plate extends upwards to form two limiting parts on both sides.

6. The polyurethane physical property test specimen mold of claim 5, wherein, The limiting part is provided with a stop step upwards at one end close to the block, and the block is detachably connected with the two stop steps.

7. The polyurethane physical property test specimen mold of claim 1 wherein, Further comprising a guide plate, the inner bottom wall of the type cavity plate is provided with the guide plate, the lower side wall of the guide plate is provided with a guide groove, and the guide groove is matched with the guide plate.

8. The polyurethane physical property test specimen mold of claim 7, wherein, The lower side wall of the guide plate forms a scraper on both sides of the guide groove.

9. The polyurethane physical property test specimen mold of claim 1 wherein, The block, the type cavity plate and the guide plate form a cavity.

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