AGV intelligent logistics tray TPE non-slip mat and preparation process thereof

Abstract

The invention provides an AGV intelligent logistics tray TPE non-slip mat which comprises a supporting seat and a non-slip part, the supporting seat is provided with a first through hole, the non-slip part is a cover body, the non-slip part is arranged on the outer side of the supporting seat in a sleeving mode, and the non-slip part is provided with a corresponding second through hole. The preparation process comprises the following steps: S1, pretreating the raw materials; pP particles and TPE particles are selected and dried; s2, injection molding of a PP supporting seat; s3, carrying out secondary injection molding on a TPE anti-skid part; the anti-skid pad is embedded in the tray to achieve skid resistance of the surface of the tray, the interior of the device is supported through the supporting base, the supporting performance is high, it is ensured that the anti-skid pad and the tray are firmly installed, and the anti-skid pad is good in heat dissipation performance and long in service life. The product quality is high, the interface bonding force between the supporting base and the anti-skid part is high, the peel strength is larger than 22 N / cm, interface connection is firm, the problem of composite layering of the supporting base and the anti-skid part is solved, and the product service life is long.

Description

Technical Field

[0001] The present invention relates to the field of anti-skid pads for pallets, and in particular to a TPE anti-skid pad for an AGV intelligent logistics pallet and a preparation process thereof. Background Art

[0002] AGV intelligent logistics pallet is a standardized pallet used for AGV (automatic guided vehicle), which realizes efficient handling and management of goods through the pallet.

[0003] However, AGV intelligent logistics pallets are often injection-molded from plastic materials with a smooth surface. When the pallets are empty or loaded with goods, the friction between the pallets or between the pallets and the goods is small. At present, when the AGV vehicle runs at a high speed, such as in some petrochemical enterprises, the straight-line acceleration speed is very fast and it needs to slow down when turning. The top pallet is easy to slide due to its own weight and inertia, posing a safety hazard. Therefore, it is necessary to increase the friction on the pallet surface to solve the problem of the current anti-slip of plastic AGV intelligent logistics pallets. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a TPE anti-slip mat for an AGV intelligent logistics pallet and a preparation process thereof.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A TPE anti-slip mat for an AGV intelligent logistics pallet comprises a support seat and an anti-slip portion, wherein the support seat is provided with a first through hole, the anti-slip portion is a cover body, the anti-slip portion is sleeved on the outer side of the support seat, and the anti-slip portion is provided with a corresponding second through hole.

[0006] Furthermore, the support seat includes a base plate and a support cover, the support cover includes a cover plate and a short cylinder, the cover plate is concentrically fixed to the upper end of the short cylinder, the lower end of the short cylinder is open, the base plate is annular, the base plate is concentrically fixed to the lower end of the short cylinder, the first through hole is arranged on the cover plate, and the diameter of the first through hole is smaller than the inner diameter of the short cylinder.

[0007] Furthermore, the anti-slip portion includes a cover bottom and a cover wall, the inner diameter of the cover wall matches the outer diameter of the short tube, the cover bottom is provided with the second through hole, and the first through hole and the second through hole are concentrically arranged.

[0008] Furthermore, the support seat is made of PP material, and the anti-slip part is made of TPE material.

[0009] Further, reinforcing ribs are provided on the inner side of the short tube. The reinforcing ribs are strip-shaped. One side of the reinforcing rib is connected to the inner wall of the short tube. The upper end of the reinforcing rib is connected to the cover plate, and the lower end of the reinforcing rib is flush with the lower end of the short tube.

[0010] Further, convex ribs are provided on the outer side of the short tube. The convex ribs are annular, and a plurality of the convex ribs are arranged at equal intervals along the height direction of the short tube.

[0011] A preparation process of an AGV intelligent logistics pallet TPE anti-slip mat is characterized by comprising the following steps: S1: Raw material pretreatment; Select PP particles and TPE particles and dry them. S2: Injection mold the PP support seat; Place the dried PP particles into an injection molding machine, melt them at 180 - 220 °C, preheat the mold to a mold temperature of 40 - 60 °C, inject the liquid PP into the mold, and cool and demold to obtain the PP support seat; S3: Second injection mold the TPE anti-slip part; Transfer the demolded PP support seat to a co-injection mold, and preheat it to 50 - 80 °C; at the same time, put the TPE particles into the injection molding machine, melt them into a liquid state at 175 - 200 °C; then inject the liquid TPE into the co-injection mold, and finally cool and demold to obtain the anti-slip mat; S4: Product inspection and warehousing.

[0012] Further, step S1 includes: S11: Raw material selection: Select TPE particles whose formula contains 1 - 3% maleic anhydride grafted PP as a tackifier, and the difference in melt index between the TPE particles and the PP particles ≤ 20 g / 10 min; S12: Raw material drying: Dry the PP particles at 80 - 100 °C for 3 - 4 hours, and dry the TPE particles at 50 - 80 °C for 2 - 4 hours.

[0013] Further, when injection molding the PP support seat, the injection pressure is 60 - 100 MPa, the holding pressure time is 10 - 20 seconds, and the injection speed adopts a two-stage control of an initial low speed of 30 - 50 mm / s and a later high speed of 80 - 120 mm / s; When second injection molding the TPE anti-slip part, the injection pressure is 40 - 80 MPa, and the holding pressure is alternately pulsed at 50 - 70 MPa for 5 - 15 seconds. The injection speed adopts a three-stage gradient control of a first-stage speed of 30 - 35 mm / s, a second-stage speed of 100 - 120 mm / s, and a third-stage speed of 60 - 80 mm / s in sequence.

[0014] Further, the surface of the PP support seat is formed with micropores by plasma treatment or chemical etching, and the pore diameter range is 5 - 20 μm.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) For the anti-slip mat of the present invention, when in use, by providing grooves on the tray and embedding the anti-slip mat into the grooves, anti-slip on the surface of the tray is achieved. The inside of the device is supported by a support seat, with strong support. When the device is embedded in the groove, it is not easily deformed, ensuring that the anti-slip mat is firmly installed on the tray. Through the first through hole and the second through hole, good heat dissipation performance and long service life of the anti-slip mat are ensured.

[0016] (2) The preparation process of the present invention uses a dual-material injection molding integrated forming process, which saves time compared with the traditional adhesive method, has high product quality, reduces problems such as deformation, surface pores, and flow marks. The interfacial bonding force between the support seat and the anti-slip part is strong, improving the peel strength. The peel strength is greater than 22 N / cm, the interfacial connection is firm, avoiding the problem of composite delamination between the support seat and the anti-slip part, and the product has a long service life. Description of the Drawings

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the AGV intelligent logistics tray TPE anti-slip mat according to Embodiment 1 of the present invention; Figure 2 It is an exploded view of the AGV intelligent logistics tray TPE anti-slip mat according to Embodiment 1 of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the support seat of the AGV intelligent logistics tray TPE anti-slip mat according to Embodiment 1 of the present invention. Detailed Description of the Embodiment

[0018] To further understand the purpose, structure, features, and functions of the present invention, the following is a detailed description in conjunction with the embodiments. Embodiment 1

[0019] As Figures 1 - 3 shown, an AGV intelligent logistics tray TPE anti-slip mat includes a support seat 100 and an anti-slip part 200. The support seat 100 is provided with a first through hole 110. The anti-slip part 200 is a cover body, and the anti-slip part 200 is sleeved outside the support seat 100. The anti-slip part 200 is provided with a corresponding second through hole 210. When in use, by providing grooves on the tray and embedding the anti-slip mat into the grooves, anti-slip on the surface of the tray is achieved. The inside of the device is supported by the support seat, with strong support. When the device is embedded in the groove, it is not easily deformed, ensuring that the anti-slip mat is firmly installed on the tray. Through the first through hole 110 and the second through hole 210, good heat dissipation performance of the anti-slip mat is ensured.

[0020] Further, the support base 100 includes a bottom plate 120 and a support cover 130. The support cover 130 includes a cover plate 131 and a short cylinder 132. The cover plate 131 is concentrically fixed to the upper end of the short cylinder 132. The lower end of the short cylinder 132 is open. The bottom plate 120 is annular, and the bottom plate 120 is concentrically fixed to the lower end of the short cylinder 132. The first through hole 110 is provided on the cover plate 131, and the diameter of the first through hole 110 is smaller than the inner diameter of the short cylinder 132. The design of the short cylinder 132 reduces the weight of the support base 100, reduces the raw material cost, and fixes the bottom plate 120 at the open end to ensure the structural stability of the support base 100 and prevent deformation, ensuring the support performance at the top of the support base 100 and avoiding the situation that the first through hole 110 is too large to cause the top to be unable to support. The outer diameter of the bottom plate 120 is the same as the outer diameter of the anti-slip part 200. The anti-slip part 200 is sleeved outside the short cylinder, and the lower end of the anti-slip part 200 fits the upper surface of the bottom plate 120, ensuring that the structure of installing the anti-slip pad is simple and beautiful.

[0021] Further, the anti-slip part 200 includes a bottom cover 220 and a cover wall 230. The inner diameter of the cover wall 230 is matched with the outer diameter of the short cylinder 130. The second through hole 210 is provided on the bottom cover 220, and the first through hole 110 and the second through hole 210 are concentrically arranged. The diameter of the second through hole 210 does not exceed the diameter of the first through hole 110. This ensures that the anti-slip part 200 can be sleeved and fixed outside the support base 100. At the same time, the design of the first through hole 110 and the second through hole 210 allows air flow to pass freely, realizing natural air circulation, ensuring that the anti-slip pad has good heat dissipation performance and facilitating the timely dissipation of heat generated by friction. This through hole design avoids the deformation of the support base caused by the thermal expansion and contraction of the gas inside the support base, ensuring the service life of the device.

[0022] Further, the support base 100 is made of PP material, and the anti-slip part 200 is made of TPE material. Using the hard PP material as the support base 100 ensures the support performance of the support base 100, has a low raw material cost, good fluidity in injection molding processing, and is easy to prepare and produce. The TPE material has a high surface friction coefficient, effectively prevents sliding, improves the anti-slip stability, and has excellent wear resistance, ensuring a long service life of the device.

[0023] Further, a reinforcing rib 140 is also provided inside the short cylinder 132. The reinforcing rib 140 is strip-shaped. One side of the reinforcing rib 140 is connected to the inner wall of the short cylinder 132. The upper end of the reinforcing rib 140 is connected to the cover plate 131, and the lower end of the reinforcing rib 140 is flush with the lower end of the short cylinder 132. This strengthens the support strength of the support base 100, avoids deformation and damage of the support base 100, and ensures a long service life.

[0024] Further, a convex rib 150 is provided on the outer side of the short cylinder 132. The convex rib 150 is annular, and a plurality of the convex ribs 150 are arranged at equal intervals along the height direction of the short cylinder 132. This increases the friction on the surface of the short cylinder 132, ensures more secure fixation when fixing the outer anti-slip part, prevents the anti-slip part from falling off, ensures that the tensile strength between the support seat 100 and the anti-slip part 200 is ≥2.5 N / mm, and ensures a long service life of the device. Example 2

[0025] A preparation process for an AGV intelligent logistics pallet TPE anti-slip pad, characterized by comprising the following steps: S1: Raw material pretreatment; Select PP particles and TPE particles and dry them; reduce the moisture in the raw materials, avoid generating bubbles during subsequent injection molding, and improve the quality of the products.

[0026] S2: Injection mold the PP support seat; Place the dried PP particles into an injection molding machine, melt them at 180 - 220 °C, preheat the mold to a mold temperature of 40 - 60 °C, inject the liquid PP into the mold, and cool and demold to obtain the PP support seat; melting at this temperature ensures good fluidity of the melt, ensures uniform injection molding, preheats the injection mold to avoid problems such as surface weld lines and flow marks, uses a temperature below 60 °C to avoid excessive temperature causing warping and deformation, preheating the mold can slow down the melt cooling rate, reduce the internal stress concentration caused by the orientation effect, reduce defects such as shrinkage holes and bubbles, reduce the anisotropic shrinkage rate of the product, and reduce the risk of later deformation, improving the quality of the product and reducing the rejection rate.

[0027] S3: Second injection mold the TPE anti-slip part; Transfer the demolded PP support seat to a overmolding mold and preheat it to 50 - 80 °C; at the same time, put the TPE particles into the injection molding machine and melt them into a liquid state at 175 - 200 °C; then inject the liquid TPE into the overmolding mold, and finally cool and demold to obtain the anti-slip pad; this preheating temperature enhances the molecular chain segment movement ability on the surface of the PP support seat, forms physical entanglement and chemical bonding when contacting the TPE melt, improves the bonding strength, ensures a firm connection between the support seat and the anti-slip part, avoids falling off, preheats the mold, reduces the temperature difference between the support seat and the TPE melt, reduces the interfacial stress generated by the thermal shrinkage difference during the cooling stage, and has a stronger peel strength at the bonding surface.

[0028] S4: Product inspection and warehousing.

[0029] Further, step S1 includes: S11: Raw material selection: Select TPE particles with 1 - 3% maleic anhydride grafted PP as the tackifier in the formula, and the difference in melt index between the TPE particles and PP particles ≤ 20 g / 10 min; Ensure the adhesion and fluidity after the TPE particles melt. At the same time, the difference in melt index between the two is small, the shrinkage rate difference < 0.5%, to avoid warping deformation (measured flatness deviation ≤ 0.3 mm / m²), and avoid delamination caused by the shrinkage rate difference. Ensure high bonding strength between the PP and TPE two-phase interfaces, not easy to separate, and the peel strength ≥ 20 N / cm to ensure product quality and yield.

[0030] Commercially available SEBS-based TPE particles can be selected, or prepared by oneself using 50 - 70% SEBS substrate, 15 - 30% white oil, 5 - 20% calcium carbonate, 1 - 3% maleic anhydride grafted PP, 5% - 15%, 2% nano-silica for mixing and kneading, and extruded and granulated using a twin-screw extruder to increase the friction coefficient of TPE > 0.9, ensure good anti-slip performance of the prepared anti-slip part, avoid the goods on the tray or other trays from slipping during high-speed operation, and avoid potential safety hazards. And also use PP to improve the hardness of TPE, avoid TPE being too soft and easy to deform, resulting in insufficient support, easy to fall off, and short service life.

[0031] S12: Raw material drying: Dry the PP particles at 80 - 100 °C for 3 - 4 hours, and dry the TPE particles at 50 - 80 °C for 2 - 4 hours. Ensure that the moisture in the particles is below 0.03% to avoid melt interface bubbles and silver streaks caused by the volatilization of water vapor during the injection molding process, improve the surface finish of the product, reduce the risk of hydrolysis degradation, have a high mechanical property retention rate, and avoid reducing the elastic recovery performance. It is also easier to blend evenly with the masterbatch, reduce the surface color difference and flow marks of the product, and prepare products of different colors to meet different color requirements.

[0032] Furthermore, when injection molding the PP support seat, the injection pressure is 60 - 100 MPa, the holding pressure time is 10 - 20 seconds, and the injection speed adopts a two-stage control of 30 - 50 mm / s initial low speed and 80 - 120 mm / s later high speed; Adopt two-stage injection of low speed to high speed to ensure full filling of the melt. High-pressure injection of PP (60 - 100 MPa) avoids flash, the holding pressure time is longer, and the size fluctuation is controlled within ±0.05 mm, and the product accuracy is higher.

[0033] When secondarily injecting the TPE anti-slip part, the injection pressure is 40 - 80 MPa, and alternate pulse holding pressure of 50 - 70 MPa is applied for 5 - 15 seconds. The injection speed adopts three-stage gradient control in sequence with a primary speed of 30 - 35 mm / s, a secondary speed of 100 - 120 mm / s, and a tertiary speed of 60 - 80 mm / s. Through the three-stage gradient speed and pulse holding pressure (alternating at 50 - 70 MPa), the molecular chains penetrate deeply into the PP layer, the interfacial peel strength is increased to more than 22 N / cm, and at the same time, microcracks are reduced. The TPE anti-slip part is injected at low and medium pressure (40 - 80 MPa), reducing the risk of melt fracture, ensuring product quality, and greatly reducing the rejection rate. This process realizes the synergistic effect of the rigid support of the PP layer and the high friction performance of the TPE layer, and at the same time meets the VOC emission standards.

[0034] Furthermore, the surface of the PP support seat is treated by plasma or chemically etched to form micropores with a pore size range of 5 - 20 μm. This ensures the synergistic effect of the PP support seat and the TPE tackifier during injection molding, increases the interfacial bonding area, improves the peel strength, avoids the problem of delamination of the composite of the support seat and the anti-slip part, and ensures a long service life and a firm interfacial connection.

[0035] The present invention has been described by the above related embodiments. However, the above embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, all changes and modifications made without departing from the spirit and scope of the present invention fall within the scope of the patent protection of the present invention.

Claims

1. An AGV intelligent logistics pallet TPE anti-slip mat, characterized in that: It includes a support base and an anti-slip part. A first through-hole is provided on the support base. The anti-slip part is a cover body. The anti-slip part is sleeved on the outside of the support base, and a corresponding second through-hole is provided on the anti-slip part.

2. The AGV intelligent logistics pallet TPE anti-slip mat according to claim 1, characterized in that: The support base includes a bottom plate and a support cover. The support cover includes a cover plate and a short cylinder. The cover plate is concentrically fixed at the upper end of the short cylinder. The lower end of the short cylinder is open. The bottom plate is annular. The bottom plate is concentrically fixed at the lower end of the short cylinder. The first through-hole is provided on the cover plate, and the diameter of the first through-hole is smaller than the inner diameter of the short cylinder.

3. The AGV intelligent logistics pallet TPE anti-slip mat according to claim 2, characterized in that: The anti-slip part includes a cover bottom and a cover wall. The inner diameter of the cover wall is matched with the outer diameter of the short cylinder. The second through-hole is provided on the cover bottom. The first through-hole and the second through-hole are concentrically arranged.

4. The AGV intelligent logistics pallet TPE anti-slip mat according to claim 1, characterized in that: The support base is made of PP material, and the anti-slip part is made of TPE material.

5. The AGV intelligent logistics pallet TPE anti-slip mat according to claim 2, characterized in that: Reinforcing ribs are further provided on the inner side of the short cylinder. The reinforcing ribs are strip-shaped. One side of the reinforcing ribs is connected to the inner wall of the short cylinder. The upper end of the reinforcing ribs is connected to the cover plate, and the lower end of the reinforcing ribs is flush with the lower end of the short cylinder.

6. The AGV intelligent logistics pallet TPE anti-slip mat according to claim 2, wherein: Convex ribs are provided on the outside of the short cylinder. The convex ribs are annular, and a plurality of the convex ribs are arranged at equal intervals along the height direction of the short cylinder.

7. A preparation process of the AGV intelligent logistics pallet TPE anti-slip mat according to any one of claims 1-6, characterized in that: It includes the following steps: S1: Raw material pretreatment; Select PP particles and TPE particles and dry them. S2: Injection mold the PP support base; Put the dried PP particles into an injection molding machine, melt them at 180 - 220 °C, preheat the mold to a mold temperature of 40 - 60 °C, inject the liquid PP into the mold, and cool and demold to obtain the PP support base. S3: Second injection mold the TPE anti-slip part; Transfer the demolded PP support base to a overmolding mold and preheat it to 50 - 80 °C; at the same time, put the TPE particles into the injection molding machine and melt them into a liquid state at 175 - 200 °C; then inject the liquid TPE into the overmolding mold, and finally cool and demold to obtain the anti-slip pad. S4: Product inspection and warehousing.

8. The preparation process of the AGV intelligent logistics pallet TPE anti-slip mat according to claim 7, characterized in that: Step S1 includes: S11: Raw material selection: Select TPE particles containing 1 - 3% maleic anhydride grafted PP as a tackifier in the formula, and the difference in melt index between the TPE particles and the PP particles ≤ 20 g / 10 min; S12: Raw material drying: Dry the PP particles at 80 - 100 °C for 3 - 4 hours, and dry the TPE particles at 50 - 80 °C for 2 - 4 hours.

9. The preparation process of the AGV intelligent logistics pallet TPE anti-slip mat according to claim 7, characterized in that: When injection molding the PP support base, the injection pressure is 60 - 100 MPa, the holding pressure time is 10 - 20 seconds, and the injection speed adopts a two-stage control of an initial low speed of 30 - 50 mm / s and a later high speed of 80 - 120 mm / s. When second injection molding the TPE anti-slip part, the injection pressure is 40 - 80 MPa, alternate pulse holding pressure of 50 - 70 MPa for 5 - 15 seconds, and the injection speed adopts a three-stage gradient control of a first-stage speed of 30 - 35 mm / s, a second-stage speed of 100 - 120 mm / s, and a third-stage speed of 60 - 80 mm / s in sequence.

10. The preparation process of the AGV intelligent logistics pallet TPE anti-slip mat according to claim 7, characterized in that: The surface of the PP support base is formed with micropores by plasma treatment or chemical etching, and the pore diameter range is 5 - 20 μm.

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