Automatic equipment for preparing sealant peel strength sample

Abstract

The invention relates to automatic equipment for preparing a sealant peel strength sample. The automatic equipment comprises a base, a support frame, a lower mold, an electromagnetic horizontal controller, an upper mold, a demolding mechanical arm, a scraper assembly and a tray assembly, and the support frame is vertically arranged on the base. The adjusting component is driven through electromagnetic adsorption to achieve horizontal calibration of the lower die, after power failure, the component falls down due to gravity to avoid the stroke, the adaptability of horizontal precision and operation space is considered, and the problem of avoiding interference of a traditional horizontal mechanism is solved. The scraping assembly is integrated with a telescopic and reciprocating displacement mechanism, synchronous reverse reset is achieved after excess materials are removed, accurate collection of waste materials is achieved in cooperation with a bottom die material guide mechanism, and the process continuity and the material utilization rate are improved. Horizontal calibration, material scraping, mold closing and demolding actions form linkage through power supply switching and displacement feedback, the mold closing pressure and the curing period are matched according to needs, and automatic and accurate regulation and control of the whole forming process are achieved.

Description

Technical Field

[0001] This invention relates to the field of sample preparation technology, and specifically provides an automated device for preparing sealant peel strength samples. Background Technology

[0002] Sealants are mainly used in aircraft manufacturing and construction engineering. The substrates involved in sealants include not only new metal materials such as steel and titanium alloys, but also non-metallic materials such as new primers and composite materials. This places higher demands on the adhesive performance of sealants. Peel strength is one of the most important indicators of sealant adhesive performance. Most literature focuses on improving peel performance and pays little attention to the sample preparation method. Currently, the "HB 5249-1993 Room Temperature Curing Sealant 180° Peel Strength Test Method" describes the sample mold and method. The mold is made of polypropylene and has two templates, an upper and a lower one. A metal plate is placed on the lower template. The sealant is applied to the metal plate to fill the groove. A layer of canvas is sandwiched between the upper and lower templates. A layer of sealant about 0.8 mm thick is applied to the other side of the canvas, and the sealant is applied to penetrate the canvas as much as possible. Finally, it is cured according to the curing regime. Some research labs use stainless steel molds, which also have upper and lower templates. A release agent is applied to the surface and sides of the lower template. After the release agent dries, a metal plate is placed and filled with sealant. A steel mesh is sandwiched between the upper and lower templates. A thick layer of sealant is applied to the other side of the steel mesh. Finally, it is cured according to the vulcanization regime.

[0003] In the methods described above, the "HB 5249-1993 Test Method for 180° Peel Strength of Room Temperature Curing Sealants" describes that after the sample mold is accelerated to a certain temperature, some sealant penetrates the mold surface, causing residue and affecting future use; there are also many rivets, making disassembly complex. In the stainless steel molds used in the laboratory, after the release agent evaporates, disassembling the sample is time-consuming and laborious, and excess sealant is difficult to clean. The sealant itself is viscous, the surface of the mixed sealant application is uneven, and the application thickness cannot be measured. Summary of the Invention

[0004] The purpose of this invention This invention utilizes modern automation technology to solve the problem of time-consuming and labor-intensive sample disassembly, thus improving work efficiency. Simultaneously, it also solves the problems of sealant residue on the mold and difficult cleaning, improving mold utilization. Mold disassembly allows for convenient placement of a release liner, replacing the mold release agent, which is both safe and environmentally friendly. This invention is equipped with an automatic telescopic scraper device, which solves the problem of uneven sealant application.

[0005] This invention is achieved through the following technical solution: An automated device for preparing sealant peel strength test samples is provided, comprising a base, a support frame, a lower mold, an electromagnetic level controller, an upper mold, a demolding robotic arm, a scraper assembly, and a tray assembly; the support frame is erected on the base; The lower mold includes a bottom mold, a left mold, and a right mold; the lower mold is fixedly connected to the support frame via an electromagnetic level controller. When the electromagnetic level controller is energized, the lower mold is horizontally suspended relative to the support frame; when the electromagnetic level controller is de-energized, the lower mold hangs freely relative to the support frame. The upper mold and the support frame are vertically slidingly engaged. The support frame integrates a reciprocating displacement mechanism. The upper mold is connected to the reciprocating displacement mechanism. The reciprocating displacement mechanism can drive the upper mold to slide vertically back and forth relative to the support frame. When the upper mold is driven to move downward, it can achieve mold closing with the lower mold. When the upper mold is driven to move upward, it can achieve mold separation and demolding from the lower mold. The two demolding robotic arms are mounted on the support frame, with one demolding robotic arm corresponding to each of the left and right molds. The demolding robotic arms enable the left and right molds to be closed and separated from the bottom mold. The tray assembly includes a material tray and a slide rail mechanism; the slide rail mechanism is mounted on the base, and the material tray is mounted on the slide rail mechanism. The material tray slides horizontally via the slide rail mechanism. When the material tray slides to the bottom of the lower mold, it can receive residual or leftover material on the mold. The scraper assembly includes a bracket, a scraper, a reciprocating displacement mechanism, and a telescopic mechanism. The bracket stands upright on the base and integrates the reciprocating displacement mechanism. The telescopic mechanism is mounted on the reciprocating displacement mechanism, and the scraper is mounted on the telescopic mechanism, allowing the scraper to move horizontally and vertically. When the electromagnetic level controller is de-energized, allowing the lower mold to hang freely, the telescopic mechanism enables the scraper to translate and contact the lower mold, and the reciprocating displacement mechanism drives the scraper to reciprocate to scrape the surface of the lower mold.

[0006] Furthermore, the reciprocating mechanism of the support frame is a transmission belt or chain.

[0007] Furthermore, the reciprocating mechanism of the bracket is a transmission belt or chain.

[0008] Furthermore, the telescopic mechanism is a servo actuator.

[0009] Furthermore, the demolding robotic arm operates in a horizontal motion mode.

[0010] Furthermore, the lower mold is spliced ​​together with the left and right molds.

[0011] Furthermore, the scraper and telescopic mechanism are detachably mounted, allowing for the installation of various scrapers.

[0012] Furthermore, a roller is provided between the tray and the base, and the roller supports the tray.

[0013] How to use: 1. Lower mold positioning and level calibration: The lower mold is detachably fixed to the preset assembly position of the support frame by positioning bolts. After the electromagnetic drive circuit is turned on, the electromagnetic level control components symmetrically arranged on both sides of the lower mold are started synchronously. The electromagnetic adsorption unit inside generates a directional force to drive the displacement of the adjustment component. Combined with the reference surface data collected in real time by the level detection sensor, the horizontal error of the working surface of the lower mold is controlled within a very small range (±0.02mm), maintaining a stable horizontal posture.

[0014] 2. Material Coating and Mechanism Avoidance: After uniformly coating the molding area of ​​the lower mold cavity with a preset dose of functional material, the power supply circuit of the electromagnetic horizontal control component is cut off, the electromagnetic adsorption force is released, and the adjusting arm hangs vertically around the hinge point under the action of gravity, finally remaining parallel to the side facade of the support frame, thus avoiding the subsequent working space.

[0015] 3. Excess Material Scraping and Reset: The scraper actuator mounted on the top of the bracket is driven by an electric telescopic component to move horizontally to the scraping start position on the upper surface of the lower mold bottom die. The gap between the scraper blade and the working surface of the bottom die is controlled at 0.01-0.03mm. The bracket is activated to move back to the reset position, which drives the scraper to scrape off excess material from top to bottom at a uniform speed along the normal direction of the forming surface. The scraped waste material falls precisely into the receiving tray through the bottom die pouring structure. After scraping is completed, the scraper is reset to the initial standby position by moving back in the opposite direction through the telescopic mechanism.

[0016] 4. Material Transfer and Mold Closing Operation: The material tray is moved to the waste collection area along the preset trajectory via a linear slide rail mechanism. The tray tilts 30-45° by a material tray flipping drive device to completely empty the internal waste material into the waste storage bin before resetting. The electromagnetic level controller power is turned on again to adjust the component reset and recalibrate the level of the lower mold. The upper mold moves downward at a uniform speed in the vertical direction via a ball screw type resetting mechanism until it is tightly pressed against the forming surface of the lower mold. The mold closing pressure is maintained within the preset range.

[0017] 5. Curing and Demolding: Keep the mold closed until the functional material completes the preset curing cycle. The resetting mechanism drives the upper mold to reset to the initial position. The demolding robotic arms fixed on both sides of the support frame start synchronously. The pneumatic grippers clamp the left and right side molds of the lower mold and move synchronously in the opposite direction to separate the left and right molds from the molded sample. Finally, the molded sample on the bottom mold is removed by the part removal device to complete the single molding process.

[0018] Technical effects of the present invention This invention achieves horizontal calibration of the lower mold through electromagnetic adsorption-driven adjustment components. After power failure, the components fall downwards due to gravity to avoid the travel stroke, balancing horizontal accuracy and adaptability to the working space, thus solving the interference problem of traditional horizontal mechanisms. The scraping component integrates a telescopic and reciprocating mechanism, synchronously reversing and resetting after clearing excess material. This, combined with the bottom mold guiding mechanism, enables precise waste collection, improving process continuity and material utilization. Horizontal calibration, scraping, mold closing, and demolding actions are linked through power supply switching and displacement feedback. Mold closing pressure and curing cycle are adapted as needed, achieving automated and precise control of the entire molding process. Attached Figure Description

[0019] Figure 1 A schematic diagram of an automated device for preparing sealant peel strength test samples; Figure 2 Here are before and after photos of the lower mold being disassembled; Among them: 1-base, 2-support frame, 3-bottom mold, 4-left mold, 5-right mold, 6-left electromagnetic horizontal controller, 7-right electromagnetic horizontal controller, 8-upper mold, 9-left demolding robot arm, 10-right demolding robot arm, 11-bracket, 12-scraper, 13-reciprocating retraction mechanism, 14-telescopic mechanism, 15-material tray, 16-slide rail mechanism. Detailed Implementation

[0020] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described, and these examples should not be construed as limited to those set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0021] An embodiment provides an automated device for preparing sealant peel strength test samples, including a base, a support frame, a lower mold, an electromagnetic level controller, an upper mold, a demolding robotic arm, a scraper assembly, and a tray assembly; the support frame is erected on the base; The lower mold includes a bottom mold, a left mold, and a right mold; the lower mold is fixedly connected to the support frame via an electromagnetic level controller. When the electromagnetic level controller is energized, the lower mold is horizontally suspended relative to the support frame; when the electromagnetic level controller is de-energized, the lower mold hangs freely relative to the support frame. The upper mold and the support frame are vertically slidingly engaged. The support frame integrates a reciprocating displacement mechanism. The upper mold is connected to the reciprocating displacement mechanism. The reciprocating displacement mechanism can drive the upper mold to slide vertically back and forth relative to the support frame. When the upper mold is driven to move downward, it can achieve mold closing with the lower mold. When the upper mold is driven to move upward, it can achieve mold separation and demolding from the lower mold. The two demolding robotic arms are mounted on the support frame, with one demolding robotic arm corresponding to each of the left and right molds. The demolding robotic arms enable the left and right molds to be closed and separated from the bottom mold. The tray assembly includes a material tray and a slide rail mechanism; the slide rail mechanism is mounted on the base, and the material tray is mounted on the slide rail mechanism. The material tray slides horizontally via the slide rail mechanism. When the material tray slides to the bottom of the lower mold, it can receive residual or leftover material on the mold. The scraper assembly includes a bracket, a scraper, a reciprocating displacement mechanism, and a telescopic mechanism. The bracket stands upright on the base and integrates the reciprocating displacement mechanism. The telescopic mechanism is mounted on the reciprocating displacement mechanism, and the scraper is mounted on the telescopic mechanism, allowing the scraper to move horizontally and vertically. When the electromagnetic level controller is de-energized, allowing the lower mold to hang freely, the telescopic mechanism enables the scraper to translate and contact the lower mold, and the reciprocating displacement mechanism drives the scraper to reciprocate to scrape the surface of the lower mold.

[0022] The reciprocating mechanism of the support frame is a transmission belt or chain.

[0023] The reciprocating mechanism of the bracket is a drive belt or chain.

[0024] The telescopic mechanism is a servo actuator.

[0025] The demolding robotic arm moves horizontally.

[0026] The lower mold is assembled with the left and right molds.

[0027] The scraper and telescopic mechanism are detachably mounted. Multiple scrapers can be installed.

[0028] A roller is provided between the tray and the base, and the roller supports the tray.

[0029] Descriptions of various advantageous arrangements have been shown for illustrative and descriptive purposes, but such descriptions are not intended to be exclusive or limited to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. Furthermore, different advantageous examples may describe different advantages compared to other advantageous examples. One or more examples have been selected and described in order to best illustrate the principles and practical application of the examples, and to enable those skilled in the art to understand that this disclosure contains various examples with various modifications suitable for the particular intended use.

Claims

1. An automatic device for preparing sealant peel strength test samples, characterized in that: It includes a base, a support frame, a lower mold, an electromagnetic level controller, an upper mold, a demolding robotic arm, a scraper assembly, and a tray assembly; the support frame stands upright on the base; The lower mold includes a bottom mold, a left mold, and a right mold; the lower mold is fixedly connected to the support frame via an electromagnetic level controller. When the electromagnetic level controller is energized, the lower mold is horizontally suspended relative to the support frame; when the electromagnetic level controller is de-energized, the lower mold hangs freely relative to the support frame. The upper mold and the support frame are vertically slidingly engaged. The support frame integrates a reciprocating displacement mechanism. The upper mold is connected to the reciprocating displacement mechanism. The reciprocating displacement mechanism can drive the upper mold to slide vertically back and forth relative to the support frame. When the upper mold is driven to move downward, it can achieve mold closing with the lower mold. When the upper mold is driven to move upward, it can achieve mold separation and demolding from the lower mold. The two demolding robotic arms are mounted on the support frame, with one demolding robotic arm corresponding to each of the left and right molds. The demolding robotic arms enable the left and right molds to be closed and separated from the bottom mold. The tray assembly includes a material tray and a slide rail mechanism; the slide rail mechanism is mounted on the base, and the material tray is mounted on the slide rail mechanism. The material tray slides horizontally via the slide rail mechanism. When the material tray slides to the bottom of the lower mold, it can receive residual or leftover material on the mold. The scraper assembly includes a bracket, a scraper, a reciprocating displacement mechanism, and a telescopic mechanism. The bracket stands upright on the base and integrates the reciprocating displacement mechanism. The telescopic mechanism is mounted on the reciprocating displacement mechanism, and the scraper is mounted on the telescopic mechanism, allowing the scraper to move horizontally and vertically. When the electromagnetic level controller is de-energized, allowing the lower mold to hang freely, the telescopic mechanism enables the scraper to translate and contact the lower mold, and the reciprocating displacement mechanism drives the scraper to reciprocate to scrape the surface of the lower mold.

2. The automatic equipment for preparing sealant peel strength test samples as described in claim 1, characterized in that: The reciprocating mechanism of the support frame is a transmission belt or chain.

3. The automatic equipment for preparing sealant peel strength test samples as described in claim 1, characterized in that: The reciprocating mechanism of the bracket is a drive belt or chain.

4. The automatic equipment for preparing sealant peel strength test samples as described in claim 1, characterized in that: The telescopic mechanism is a servo actuator.

5. The automatic equipment for preparing sealant peel strength test samples as described in claim 1, characterized in that: The demolding robotic arm moves horizontally.

6. The automatic equipment for preparing sealant peel strength test samples as described in claim 1, characterized in that: The lower mold is assembled with the left and right molds.

7. The automatic equipment for preparing sealant peel strength test samples as described in claim 1, characterized in that: The scraper and telescopic mechanism are detachably mounted. Multiple scrapers can be installed.

8. The automatic equipment for preparing sealant peel strength test samples as described in claim 1, characterized in that: A roller is provided between the tray and the base, and the roller supports the tray.

Images