Negative pressure adsorption joint for injection molding parts and attitude adjusting device

Abstract

The application discloses a negative pressure adsorption joint for injection molding parts and a posture adjusting device, and belongs to the field of injection molding part production equipment. The negative pressure adsorption joint comprises a negative pressure adsorption disc, and the end of the negative pressure adsorption disc is provided with a flexible buffer body. The flexible buffer body comprises a circular annular deformation buffer ring and a circular annular reinforcing framework, and the reinforcing framework is arranged between the deformation buffer ring and the negative pressure adsorption disc. When the adsorption end of the negative pressure adsorption disc adsorbs the injection molding part, the flexible buffer body can play a buffering role and has a protection effect on the injection molding part. The deformation buffer ring deforms under the action of pressure and increases the contact area with the surface of the injection molding part. The deformation of the deformation buffer ring can adapt to injection molding parts of various shapes, greatly increasing the universality of the application. Under the action of the reinforcing framework in the deformation buffer ring, the deformation buffer ring can extend to the inner and outer sides of the negative pressure adsorption disc simultaneously when deforming, thereby reducing the occupied area of the adsorption end of the negative pressure adsorption disc on the injection molding part.

Description

Technical Field

[0001] This invention belongs to the field of injection molding production equipment, specifically a negative pressure adsorption connector and posture adjustment device for injection molding parts. Background Technology

[0002] Injection molded parts refer to various products formed by injection molding machines. Plastic products are made from thermoplastic or thermosetting materials using molds, and can be formed into various shapes according to different uses and fields. With the needs of modern society, injection molded parts are increasingly developing towards higher precision, which also places higher demands on injection molding processes.

[0003] In some automated processing stages, injection molded parts need to be held by robotic arms to facilitate operations such as grinding, polishing, and gate removal on the part surface using processing fixtures. However, due to the wide variety of injection molded parts and their varying shapes, especially long and thin products with curved surfaces, robotic arms struggle to grasp them. Designing a dedicated robotic arm for each type of injection molded part is costly. Furthermore, robotic arms cover a significant portion of the part surface, potentially obstructing the processing fixtures.

[0004] Although negative pressure adsorption technology is now being used in the injection molding industry, the suction cups of the equipment are often very large, taking up a lot of space, in order to protect the product and ensure the adsorption effect. Moreover, once the suction cup holds the product, the product's posture cannot be adjusted, which can easily lead to processing errors. Summary of the Invention

[0005] The purpose of this invention is to provide a negative pressure adsorption connector and posture adjustment device for injection molded parts to solve the problems mentioned in the background art.

[0006] A negative pressure adsorption connector and posture adjustment device for injection molded parts are provided, comprising:

[0007] A negative pressure suction cup, wherein a flexible buffer is provided at the end of the negative pressure suction cup;

[0008] The flexible buffer body includes a circular deformable buffer ring and a circular reinforcing skeleton, wherein the reinforcing skeleton is disposed between the deformable buffer ring and the negative pressure suction cup.

[0009] As a further aspect of the present invention: the reinforcing frame includes a fitting end, a transition section and an extension end, wherein the fitting end and the extension end are fixedly connected by the transition section.

[0010] As a further aspect of the present invention, the fitting end and the negative pressure suction cup are detachably connected.

[0011] As a further aspect of the present invention: the extended end includes two deformable strips, which are respectively disposed on the inner ring side and the outer ring side of the annular surface of the transition section.

[0012] As a further aspect of the present invention: the connection point of the two deformable strips is a tapered transition structure in which the width dimension gradually increases.

[0013] As a further aspect of the present invention, the material used for the deformable strip is carbon fiber.

[0014] In another aspect, the present invention provides a posture adjustment device for injection molded parts, including the above-mentioned negative pressure adsorption connector, and further comprising:

[0015] A conveying guide rail, on which at least one negative pressure adsorption connector is slidably connected;

[0016] A fixed bracket is fixedly connected to a conveyor rail, and at least one negative pressure adsorption connector is fixedly connected to the fixed bracket.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. When the suction end of the negative pressure suction cup is used to suction the injection molded part, the flexible buffer can play a buffering role and protect the injection molded part.

[0019] 2. When the inner cavity of the negative pressure suction cup is under negative pressure, the deformation buffer ring deforms under pressure and increases the contact area with the surface of the injection molded part. The deformation of the deformation buffer ring can adapt to injection molded parts of various shapes, greatly increasing the versatility of its applications.

[0020] 3. With the reinforcement of the skeleton inside the deformation buffer ring, the deformation buffer ring can extend to both the inner and outer sides of the negative pressure suction cup simultaneously when it deforms, reducing the area occupied by the suction end of the negative pressure suction cup on the injection molded part. Attached Figure Description

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of a posture adjustment device for injection molded parts.

[0023] Figure 2 A schematic diagram of the overall structure of a negative pressure adsorption connector for injection molded parts;

[0024] Figure 3 This is a schematic diagram of the structure of the negative pressure suction cup provided by the present invention;

[0025] Figure 4 This is a cross-sectional view of the negative pressure suction cup provided by the present invention.

[0026] In the diagram: 1. Negative pressure suction cup; 2. Flexible buffer body; 21. Deformable buffer ring; 22. Reinforcing frame; 221. Fitting end; 222. Transition section; 223. Extension end; 2231. Deformable strip; 3. Conveying guide rail; 4. Negative pressure adsorption connector; 5. Fixed bracket. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] Please see Figure 2-4 As shown in the embodiment of the present invention, a negative pressure adsorption connector for injection molded parts includes a negative pressure suction cup 1, and a flexible buffer body 2 is provided at the end of the negative pressure suction cup 1. The flexible buffer body 2 includes an annular deformable buffer ring 21 and an annular reinforcing skeleton 22, and the reinforcing skeleton 22 is disposed between the deformable buffer ring 21 and the negative pressure suction cup 1.

[0030] The suction cup 1 has its adsorption end near the flexible buffer 2. A vacuum pump is installed inside the suction cup 1, or connected externally via a flexible hose. The vacuum pump creates a negative pressure environment inside the suction cup 1. Since the weight, strength, and application point of the suction cup 1 on each injection molded part are different, the vacuum pump is needed to control the negative pressure intensity, achieving the minimum possible negative pressure environment for the suction cup 1 to grip the injection molded part. Furthermore, to prevent damage to the injection molded part due to excessive negative pressure, a pressure sensor is installed inside the suction cup 1. Since the strength of each injection molded part is different, when the negative pressure reaches a predetermined value, the vacuum pump stops pumping air to maintain a stable negative pressure.

[0031] The deformable buffer ring 21 can be made of polyurethane rubber, nitrile rubber, or silicone rubber, possessing strong toughness and deformation capacity. Under certain pressure, the material surface adheres tightly to the injection molded part, achieving a complete seal and firmly gripping the injection molded part. The circular shape ensures even force distribution across all parts, enhancing the sealing effect. The deformable buffer ring 21 adheres to the surface of the injection molded part through deformation and its own resilience, allowing it to adapt to flat, curved, and various irregularly shaped surfaces.

[0032] The reinforcing frame 22 serves to connect and support the deformable buffer ring 21. The reinforcing frame 22 connects the deformable buffer ring 21 to the negative pressure suction cup 1. When the deformable buffer ring 21 is deformed to a certain extent under pressure, the pressure on the injection molded part is borne by the reinforcing frame 22. The reinforcing frame 22 increases the force-bearing area of ​​the injection molded part, preventing direct contact between the injection molded part and the small-area port of the negative pressure suction cup 1, thus preventing excessive pressure from damaging the surface of the injection molded part.

[0033] The reinforcing frame 22 includes a fitting end 221, a transition section 222, and an extension end 223. The fitting end 221 and the extension end 223 are fixedly connected by the transition section 222. The fitting end 221 is provided with a slot, which can be fitted into the inside of the negative pressure suction cup 1 to fix the entire reinforcing frame 22. The fitting end 221 and the negative pressure suction cup 1 are detachably connected. The slot of the fitting end 221 can be replaced with a thread, and the threaded connection between the fitting end 221 and the negative pressure suction cup 1 can be made convenient for replacing the flexible buffer 2.

[0034] Since the mating end 221 serves as a connection and the transition section 222 serves as a support, the mating end 221 and the transition section 222 can be made of metal or high-strength plastic parts, which can support the weight of the entire injection molded part.

[0035] The extension end 223 includes two deformable strips 2231, which are respectively located on the inner and outer ring sides of the annular surface of the transition section 222. When the deformable buffer ring 21 is deformed under pressure, and the reinforcing skeleton 22 provides the main support, the two originally slightly closed deformable strips 2231 will gradually extend to both sides under pressure. When the injection molded part abuts against the bottom of the two deformable strips 2231 across the deformable buffer ring 21, the deformable strips 2231 extend to their limit and cover the surface of the injection molded part across the deformable buffer ring 21. Under the elastic recovery of the deformable strips 2231 themselves, they adhere tightly to the injection molded part and automatically adapt to the surface shape of the injection molded part. The pressure of the transition section 222 is transmitted to the surface of the injection molded part through the two deformable strips 2231. The deformable strips 2231 increase the force-bearing area of ​​the injection molded part, reduce the pressure on the injection molded part, play a protective role, and increase the stability of the deformable buffer ring 21 during adsorption.

[0036] Furthermore, the connection point between the two deformable strips 2231 is a tapered transition structure with a gradually increasing width. This structure evenly distributes the linear pressure of the transition section 222 onto the two deformable strips 2231 through the tapered structure. The linear force extends from the transition section 222 towards the two deformable strips 2231 at both ends. The ends of the deformable strips 2231 transmit the force through their own elasticity, making the stress on the deformable strips 2231 more reasonable. This structure ensures that all contact surfaces between the injection molded part and the deformable strips 2231 are engaged, reducing the pressure on the injection molded part.

[0037] The deformable strip 2231 is made of carbon fiber. The deformable strip 2231 needs to possess both high toughness and high strength. Because the deformable strip 2231 needs to withstand high-frequency deformation, it must maintain its properties under long-term deformation. Furthermore, the deformable strip 2231 also needs to provide a certain degree of support and therefore requires sufficient strength. Carbon fiber possesses flexible properties while exhibiting high strength in the axial direction, resulting in a deformable strip 2231 that can be bent and deformed, recover its original properties, and has strong supporting strength.

[0038] Please see Figure 1 As shown, another aspect of the present invention provides a posture adjustment device for injection molded parts, including the aforementioned negative pressure adsorption connector 4, a conveying guide rail 3, and a fixed bracket 5. At least one negative pressure adsorption connector 4 is slidably connected to the conveying guide rail 3. The fixed bracket 5 is fixedly connected to the conveying guide rail 3, and at least one negative pressure adsorption connector 4 is fixedly connected to the fixed bracket 5.

[0039] In one embodiment, two negative pressure adsorption joints 4 are slidably connected to the conveyor rail 3 for adsorbing the injection molded part and conveying it to the next processing area. The two negative pressure adsorption joints 4 simultaneously adsorb and grip, improving the balance of the gripping. A negative pressure adsorption joint 4 is provided on each side of the fixed bracket 5 for adjusting the posture of the injection molded part. The posture adjustment device is also equipped with an industrial camera to acquire image information of the injection molded part and identify whether the current posture of the injection molded part meets the requirements.

[0040] When the molded part's posture does not meet requirements, the central control system sends an adjustment signal to the negative pressure adsorption joints 4 on the fixed bracket 5. The negative pressure adsorption joints 4 on both sides of the fixed bracket 5 adsorb the molded part based on the coordinate signals of the force points, while the negative pressure adsorption joints 4 on the conveyor rail 3 release the molded part. The negative pressure adsorption joints 4 on both sides of the fixed bracket 5 then adjust the posture of the molded part. After adjustment, the negative pressure adsorption joints 4 on the conveyor rail 3 re-adsorb the molded part, the negative pressure adsorption joints 4 on both sides of the fixed bracket 5 release the molded part, and then it is conveyed to the next process step via the conveyor rail 3. By adjusting the posture of the molded part, the accuracy of subsequent processing is improved.

[0041] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A posture adjustment device for injection molded parts, characterized in that, include: Negative pressure suction cup (1); A flexible buffer (2) is disposed at the end of the negative pressure suction cup (1). The flexible buffer (2) includes an annular deformable buffer ring (21) and an annular reinforcing frame (22). The reinforcing frame (22) is disposed between the deformable buffer ring (21) and the negative pressure suction cup (1). The reinforcing frame (22) includes a fitting end (221), a transition section (222), and an extension end (223). The fitting end (221) and the extension end (223) are connected by the transition section (222). 2) Fixed connection, the extension end (223) includes two deformable strips (2231), the two deformable strips (2231) are respectively set on the inner ring side and outer ring side of the annular surface of the transition section (222), when the injection molded part abuts against the bottom of the two deformable strips (2231) through the deformation buffer ring (21), the deformable strips (2231) extend to the limit and cover the surface of the injection molded part through the deformation buffer ring (21), the connection part of the two deformable strips (2231) is a tapered transition structure with the width dimension increasing from small to large; The conveying guide rail (3) has at least one negative pressure adsorption connector (4) slidably connected to it. A fixed bracket (5) is fixedly connected to a conveying guide rail (3), and at least one negative pressure adsorption connector (4) is fixedly connected to the fixed bracket (5).

2. The posture adjustment device for injection molded parts according to claim 1, characterized in that, The fitting end (221) and the negative pressure suction cup (1) are detachably connected.

3. The posture adjustment device for injection molded parts according to claim 1, characterized in that, The deformable strip (2231) is made of carbon fiber.

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