Anti-sticking inclined ejection structure and application method

Abstract

The present application relates to the inclined top structure and application method for preventing sticking mold, comprising inclined top and back mold, the back mold is provided with back mold kernel; the inclined top rod comprises upper support rod and lower support rod, the upper end of the upper support rod is provided with reverse buckle, the upper end of the lower support rod is provided with one or more top rods, the upper support rod is provided with one or more third through holes corresponding to the top rod; the lower end of the upper support rod is provided with pressure sensor for detecting the thrust of the lower support rod, the lower support rod is provided with wiring hole for the wiring of the pressure sensor, and the lower end of the lower support rod is provided with controller for controlling lifting unit; the application method can intelligently identify the sticking inclined top condition and take corresponding measures to ensure the smooth demolding, thereby greatly improving the adaptability of inclined top demolding, and facilitating the accurate grasping of the sticking inclined top condition in the mold by the staff.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and more specifically, to a slanted ejector structure and its application method for preventing mold sticking. Background Technology

[0002] Sticking to the ejector pin is a common problem in plastic mold design. It mainly manifests as the product sticking to the ejector pin and moving with it when the ejector pin is ejecting the product. Lateral displacement occurs between the product and the rear mold core, resulting in product damage.

[0003] To solve the problem of sticking to the inclined top, several common methods include:

[0004] The angled ejector parting design leaves as much of the glue area as possible inside the mold core, which effectively reduces the maximum friction force of the angled ejector.

[0005] A straight top is designed under or next to the sloping top. By designing a straight top under or next to the sloping top, the product can be prevented from directly contacting the sloping top, thereby avoiding sticking to the sloping top.

[0006] The design of local ejector pins around the angled ejector effectively prevents the product from directly contacting the angled ejector, thereby reducing the possibility of sticking to the angled ejector.

[0007] Adding spring pins or blocks to the angled ejector can effectively prevent the product from directly contacting the angled ejector, thereby reducing the possibility of the product sticking to the angled ejector.

[0008] While the above methods can reduce the risk of the inclined ejector sticking, they all come at the cost of reducing the contact area between the inclined ejector and the product, which will sacrifice the product ejection reliability to some extent. Moreover, the structure is not intelligent enough to distinguish whether the inclined ejector is sticking. A more reasonable inclined ejector structure design is needed to solve this defect. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a slanted ejector structure for preventing mold sticking, and to provide a method for applying the slanted ejector structure for preventing mold sticking, in view of the above-mentioned defects of the prior art.

[0010] The technical solution adopted by this invention to solve its technical problem is:

[0011] A sloping ejector structure for preventing mold sticking is constructed, comprising a sloping ejector and a rear mold. The rear mold has a rear mold core. The sloping ejector includes an undercut that fits the product, a sloping ejector rod connected to the undercut, and a lifting unit acting on the lower end of the sloping ejector rod. The rear mold has a first through hole for the sloping ejector rod to pass through and be positioned thereon. The rear mold core has a second through hole for the undercut to move, and the second through hole communicates with the first through hole. The sloping ejector rod includes an upper support rod and a lower support rod. The upper end of the upper support rod has an undercut, and the upper end of the lower support rod has one or more ejector rods. The upper support rod has one or more third through holes corresponding to the ejector rods. The lower end of the upper support rod has a pressure sensor for detecting the thrust of the lower support rod. The lower support rod has a wiring hole for the pressure sensor to run through. The lower end of the lower support rod has a controller for controlling the lifting unit.

[0012] The inclined ejector structure for preventing mold sticking according to the present invention includes a lifting unit comprising a lifting seat and a cylinder for driving the lifting seat to rise and fall; a slider is slidably disposed on the lifting seat, and the slider is rotatably connected to the lower support rod.

[0013] The inclined ejector structure for preventing mold sticking according to the present invention includes a pressure sensor located at the center of the lower end of the upper support rod, and multiple ejector rods evenly distributed around the pressure sensor.

[0014] The inclined ejector structure for preventing mold sticking according to the present invention is wherein the upper support rod and the lower support rod are connected by a spring, and the spring is in a compressed state when the lower support rod presses against the upper support rod.

[0015] The inclined ejector structure for preventing mold sticking according to the present invention includes a spring sleeved around the periphery of a plurality of ejector rods.

[0016] The inclined top structure for preventing sticking to the mold according to the present invention includes a top rod comprising a rod body and a metal rod head located at the upper end of the rod body. The undercut is provided with a movable groove for the rod head to move up and down. The surface area of ​​the rod head is larger than the upper end face area of ​​the rod body.

[0017] The inclined top structure for preventing sticking to the mold according to the present invention wherein the outer surface of the rod head gradually expands from top to bottom.

[0018] A method for applying an anti-sticking inclined ejector structure, as described above, includes the following steps:

[0019] When the product is demolded, the controller controls the operation of the lifting unit, which drives the lower support rod to move obliquely upward to provide support force to the upper support rod, and the pressure sensor detects the force.

[0020] If the force detected by the pressure sensor is always less than the set threshold, then the adhesive resistance from the product on the current support rod on the surface is within a reasonable range, and normal demolding with the inclined ejector can be performed.

[0021] If the force detected by the pressure sensor exceeds the set threshold, the adhesive resistance from the product on the current upper support rod exceeds the reasonable range, resulting in sticking to the inclined ejector and preventing normal inclined ejection demolding. At this time, the controller will drive the lifting unit to move the lower support rod diagonally downward. The lower support rod will move one or more ejector rods downward, and the ejector rods will detach from the product to reduce the area of ​​sticking to the inclined ejector. Then, the controller will control the lifting unit to move the lower support rod diagonally upward to perform the inclined ejection demolding operation again.

[0022] The beneficial effects of this invention are as follows: When the product is demolded, the controller controls the operation of the lifting unit, which drives the lower support rod to move obliquely upward to provide support force to the upper support rod. The pressure sensor detects the force. If the force detected by the pressure sensor is always less than the set threshold, it indicates that the adhesive resistance from the product to the upper support rod is within a reasonable range, and normal oblique demolding can be performed. If the force detected by the pressure sensor exceeds the set threshold, it indicates that the adhesive resistance from the product to the upper support rod exceeds a reasonable range, resulting in sticking to the oblique ejector and preventing normal oblique demolding. In this case, the controller drives the lifting unit to move the lower support rod obliquely downward, and the lower support rod moves one or more ejector rods downward. The ejector rods detach from the product, reducing the area of ​​sticking to the oblique ejector. Then, the controller controls the lifting unit to move the lower support rod obliquely upward again to perform oblique demolding again. By applying the method of this application, the sticking to the oblique ejector can be intelligently identified, and corresponding measures can be taken to ensure smooth demolding, thereby greatly improving the adaptability of oblique demolding and facilitating workers to accurately grasp the sticking to the oblique ejector within the mold. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0024] Figure 1 This is a cross-sectional view of the inclined top structure for preventing mold sticking according to a preferred embodiment of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0026] The preferred embodiment of the present invention has an inclined ejector structure for preventing mold sticking, such as... Figure 1 As shown, the device includes an inclined ejector and a rear mold 1. The rear mold 1 is provided with a rear mold core 2. The inclined ejector includes a buckle 3 for fitting the product, an inclined ejector rod 4 connected to the buckle, and a lifting unit 5 acting on the lower end of the inclined ejector rod 4. The rear mold 1 is provided with a first through hole 10 for the inclined ejector rod to pass through and position it. The rear mold core 2 is provided with a second through hole 20 for the buckle to move, and the second through hole 20 communicates with the first through hole 10. The inclined ejector rod 4 includes an upper support rod 40 and a lower support rod 41. The upper end of the upper support rod 40 is provided with the buckle 3, and the lower support rod 41 is provided with the buckle 3. The upper end is provided with one or more push rods 410, and the upper support rod 40 is provided with one or more third through holes 400 corresponding to the push rods 410; the lower end of the upper support rod 40 is provided with a pressure sensor 401 for detecting the thrust of the lower support rod 41, and the lower support rod 41 is provided with a wiring hole 411 for the pressure sensor 401 to run (not directly opposite the pressure sensor and with a certain lateral distance to avoid the wiring from interfering with the normal operation of the pressure sensor); the lower end of the lower support rod 41 is provided with a controller 6 for controlling the lifting unit 5.

[0027] When the product is demolded, the controller 6 controls the lifting unit 5 to move, which drives the lower support rod 41 to move obliquely upward to provide support force to the upper support rod 40. The pressure sensor 401 detects the force. If the force detected by the pressure sensor 401 is always less than the set threshold, it means that the adhesive resistance from the product currently received by the upper support rod 40 is within a reasonable range, and the oblique demolding can be carried out normally.

[0028] If the force detected by the pressure sensor 401 exceeds the set threshold, the adhesive resistance from the product to the upper support rod 40 on the surface exceeds the reasonable range, resulting in sticking to the inclined ejector and preventing normal inclined ejection demolding. At this time, the controller 6 will drive the lifting unit 5 to move the lower support rod 41 diagonally downward. The lower support rod 41 will move one or more ejector rods 410 downward, and the ejector rods 410 will detach from the product to reduce the sticking area. Then, the controller 6 will control the lifting unit 5 to move the lower support rod 41 diagonally upward to perform the inclined ejection demolding operation again.

[0029] By applying the method of this application, the sticking of angled ejectors can be intelligently identified, and corresponding measures can be taken to ensure smooth demolding, thereby greatly improving the adaptability of angled ejector demolding and making it easier for staff to accurately grasp the sticking of angled ejectors in the mold.

[0030] Preferably, the lifting unit 5 includes a lifting seat 50 and a cylinder that drives the lifting seat 50 to lift; a slider 51 is slidably arranged on the lifting seat 50, and the slider 51 is rotatably connected to the lower support rod 41; this part can use the existing design and does not need to be improved.

[0031] Preferably, the pressure sensor 401 is located at the center of the lower end of the upper support rod 40. Multiple push rods 410 are evenly distributed around the pressure sensor 401. The upper support rod 40 and the lower support rod 41 are connected by a spring 42. When the lower support rod 41 presses against the upper support rod 40, the spring 42 is compressed. The spring 42 is sleeved around the multiple push rods 410. The purpose of this structural design is to ensure that the deformation direction of the spring 42 does not shift through the multiple push rods 410. At the same time, the spring 42 forms a layer of protection for the multiple push rods. The pressure sensor 401 located at the very center is not easily affected by external impurities, oil stains, etc., ensuring good detection accuracy. In addition, this structural layout can ensure the balance of force.

[0032] Preferably, the top rod 410 includes a rod body 4100 and a metal rod head 4101 located at the upper end of the rod body. The inverted buckle 3 is provided with a movable groove 30 for the rod head to move up and down. The surface area of ​​the rod head 4101 is larger than the upper end face area of ​​the rod body 4100. With this structural form, the thinner part of the top rod 410 corresponds to the upper support rod 40, while the wider part of the rod head 4101 corresponds to the inverted buckle 3, which is a more reasonable arrangement.

[0033] Preferably, the outer surface of the pole head 4101 is gradually widening from top to bottom, such as being truncated cone shape, etc., which can be positioned during lifting and lowering to ensure reliability.

[0034] A method for applying an anti-sticking inclined ejector structure, as described above, includes the following steps:

[0035] When the product is demolded, the controller controls the operation of the lifting unit, which drives the lower support rod to move obliquely upward to provide support force to the upper support rod, and the pressure sensor detects the force.

[0036] If the force detected by the pressure sensor is always less than the set threshold, then the adhesive resistance from the product on the current support rod on the surface is within a reasonable range, and normal demolding with the inclined ejector can be performed.

[0037] If the force detected by the pressure sensor exceeds the set threshold, the adhesive resistance from the product to the current upper support rod on the surface exceeds the reasonable range, resulting in sticking to the inclined ejector and preventing normal inclined ejector demolding. At this time, the controller will drive the lifting unit to move the lower support rod diagonally downward, and the lower support rod will move one or more ejector rods downward. The ejector rods will detach from the product to reduce the sticking area. Then the controller will control the lifting unit to move the lower support rod diagonally upward again to perform the inclined ejector demolding operation again.

[0038] By applying the method of this application, the sticking of angled ejectors can be intelligently identified, and corresponding measures can be taken to ensure smooth demolding, thereby greatly improving the adaptability of angled ejector demolding and making it easier for staff to accurately grasp the sticking of angled ejectors in the mold.

[0039] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A draft structure for preventing mold sticking, comprising a draft and a back mold on which a back mold core is provided, the draft comprising a reverse buckle which fits a product, a draft rod connected to the reverse buckle, and a lifting unit which acts on a lower end of the draft rod, characterized in that, The rear mold has a first through hole for the inclined ejector rod to pass through and be positioned therethrough. The rear mold core has a second through hole for the undercut to move through, and the second through hole communicates with the first through hole. The inclined ejector rod includes an upper support rod and a lower support rod. The upper end of the upper support rod has an undercut, and the upper end of the lower support rod has multiple ejector rods. The upper support rod has multiple third through holes corresponding to the ejector rods. The lower end of the upper support rod has a pressure sensor for detecting the thrust of the lower support rod. The lower support rod has a wiring hole for the pressure sensor to run through. A controller for controlling the lifting unit is provided; the pressure sensor is located at the center of the lower end of the upper support rod, and multiple push rods are evenly distributed around the pressure sensor; the upper support rod and the lower support rod are connected by a spring, and the spring is compressed when the lower support rod presses against the upper support rod; the spring is sleeved around the periphery of the multiple push rods; each push rod includes a rod body and a metal rod head located at the upper end of the rod body, and the buckle is provided with a movable groove for the rod head to move up and down, and the lower end face area of ​​the rod head is larger than the upper end face area of ​​the rod body.

2. The inclined ejector structure for preventing mold sticking according to claim 1, characterized in that, The lifting unit includes a lifting seat and a cylinder that drives the lifting seat to rise and fall; a slider is slidably arranged on the lifting seat, and the slider is rotatably connected to the lower support rod.

3. The inclined ejector structure for preventing mold sticking according to claim 1, characterized in that, The outer surface of the rod head gradually widens from top to bottom.

4. A method for applying an anti-sticking inclined ejector structure, used in any one of the anti-sticking inclined ejector structures as described in claims 1-3, characterized in that, Includes the following steps: When the product is demolded, the controller controls the operation of the lifting unit, which drives the lower support rod to move obliquely upward to provide support force to the upper support rod, and the pressure sensor detects the force. If the force detected by the pressure sensor is always less than the set threshold, it indicates that the adhesive resistance from the product to the upper support rod is within a reasonable range, and normal demolding with the inclined ejector can be performed. If the force detected by the pressure sensor exceeds the set threshold, it indicates that the adhesive resistance from the product to the upper support rod is beyond the reasonable range, resulting in sticking to the inclined ejector and preventing normal inclined ejection demolding. At this time, the controller will drive the lifting unit to move the lower support rod diagonally downward. The lower support rod will move multiple ejector rods downward, and the ejector rods will detach from the product to reduce the area of ​​sticking to the inclined ejector. Then, the controller will control the lifting unit to move the lower support rod diagonally upward to perform the inclined ejection demolding operation again.

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