Ejector pin protection device and plastic mold

Abstract

The utility model provides an ejector pin protection device and a plastic mold. The ejector pin protection device comprises a base (1), a mounting part (2) and a sensing part (3), the mounting part (2) is arranged on the base (1), the sensing part (3) is arranged on the mounting part (2), the sensing part (3) can sense whether an ejector pin fixing plate (94) returns to a safe position or not, and the base (1) comprises an adsorption part (4). The ejector pin protection device and the plastic mould provided by the utility model can solve the problems that the sensing position and the sensitivity of the existing ejector pin protection device cannot be flexibly adjusted, and the disassembly and assembly are inconvenient during maintenance and replacement.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold protection technical field, specifically, a ejector pin protection device and plastic mold. BACKGROUND

[0002] Injection molding machine is widely used in manufacturing daily necessities, automobile parts, electronic components and other plastic products. It realizes high efficiency, mass production of plastic products by injecting molten plastic into plastic mold under high pressure and rapidly cooling and forming. The use of plastic mold not only greatly improves the production speed and consistency, reduces the production cost, but also provides the possibility for personalized and complex design of plastic product manufacturing. After the molten plastic is cooled and formed, the plastic product needs to be ejected from the mold by the ejector pin for the next cycle of injection molding. By setting the ejector pin, the product can be quickly and accurately ejected from the mold, reducing manual operation and improving automation, thereby improving production efficiency and reducing labor costs, while reducing the scrap rate due to product damage and reducing production costs. However, if the ejector pin fails to reset completely during the return process, and the mold is directly closed, the ejector pin will collide with other parts of the mold such as the front mold or core pulling structure, which may cause damage or deformation of the mold parts, and in severe cases, the mold needs to be replaced, causing production interruption and high maintenance costs, so the ejector pin needs to be protected.

[0003] The existing ejector pin return protection device mainly uses contact switches or proximity switches to detect and protect the return position of the ejector pin by fixing the contact switches or proximity switches at the detection position. However, this fixed method results in poor flexibility of the contact switches or proximity switches, and the sensing position and sensitivity cannot be flexibly adjusted, and the maintenance and replacement are not convenient to disassemble and assemble. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide an ejector pin protection device and plastic mold, which can solve the problem of flexible adjustment of the sensing position and sensitivity of the existing ejector pin protection device, and the inconvenience of disassembly and assembly during maintenance and replacement.

[0005] In order to achieve the above purpose, according to one aspect of the utility model, an ejector pin protection device is provided, which comprises a base, a mounting part and a sensing part. The mounting part is arranged on the base, and the sensing part is arranged on the mounting part. The sensing part can sense whether the ejector pin fixing plate has returned to the safe position. The base comprises an adsorption part.

[0006] Further, the sensing part comprises a magnetic induction type proximity switch, and the sensing surface of the magnetic induction type proximity switch is arranged at the first end of the sensing part and faces the safe position.

[0007] Further, the second end of the induction part is provided with a mounting hole, the mounting part comprises a vertical segment, and the induction part is sleeved on the vertical segment through the mounting hole.

[0008] Further, the pin protection device is provided with an indicating lamp, the indicating lamp is in communication connection with the induction part, and the indicating lamp indicates the induction state of the induction part.

[0009] Further, the mounting part comprises a lifting ring screw, the lifting ring screw comprises a lifting ring and a vertical segment, one side of the base towards the mounting part is provided with a fixing part, and the vertical segment is in threaded connection with the fixing part.

[0010] Further, the base further comprises a base body, and the adsorption part is arranged on one side of the base body away from the mounting part.

[0011] Further, a heightening gasket is arranged between the fixing part and the induction part, and the heightening gasket can adjust the induction height of the induction part.

[0012] Further, a pressing nut is arranged on one side of the induction part away from the fixing part, the pressing nut is sleeved on the vertical segment and presses the induction part.

[0013] According to another aspect of the utility model, a plastic mold is provided, which comprises a plastic mold movable die plate and a pin protection device, the pin protection device is the above-mentioned pin protection device, the pin protection device is adsorbedly connected with the plastic mold movable die plate, and the pin protection device is arranged at the safe position of the pin fixing plate of the plastic mold movable die plate.

[0014] Further, the plastic mold movable die plate comprises a movable die fixing plate, the movable die fixing plate is provided with a mounting groove, the pin protection device is arranged in the mounting groove, and the induction surface of the pin protection device faces the safe position of the pin fixing plate.

[0015] Further, a dustproof plate is arranged between the induction surface and the so-called pin fixing plate.

[0016] The technical scheme of the utility model is applied, the base is the basis of the whole protection device and is used for bearing and connecting other components.The base comprises an adsorption part, so that the base can be adsorbed on a target plane, and installation and fixation of the pin protection device are realized.The mounting part is used for providing a mounting basis for the induction part, so that the induction part can be reliably connected to the base.The induction part judges whether the pin has been safely returned by inducting the position of the pin fixing plate, thereby preventing mold closing operation when the pin has not been completely returned, and mold damage is avoided.The pin protection device provided by the utility model is adsorbed and fixed on the surface of the plastic mold through the arrangement of the adsorption part, when it is necessary to adjust the detection position of the pin protection device or the pin protection device needs to be disassembled and replaced, the pin protection device can be taken and installed and fixed at any time, which is more convenient and fast, and the flexibility of the pin protection device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The description and drawings of the utility model constitute a part of the utility model, and are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and the explanation thereof are used to explain the utility model, and do not constitute improper limitation to the utility model.In the drawings:

[0018] Figure 1 The overall structure perspective view of the ejector pin protection device of the embodiment of the utility model is shown;

[0019] Figure 2 The side view of the ejector pin protection device of the embodiment of the utility model is shown;

[0020] Figure 3 The overall structure diagram of the plastic mold of the embodiment of the utility model is shown;

[0021] Figure 4 The installation position perspective view of the ejector pin protection device of one embodiment of the utility model is shown;

[0022] Figure 5 The installation position perspective view of the ejector pin protection device of another embodiment of the utility model is shown;

[0023] Figure 6 The overall structure schematic diagram of the plastic mold of the embodiment of the utility model when the ejector pin fixing plate is not retreated to the safe position is shown;

[0024] Figure 7 The overall structure schematic diagram of the plastic mold of the embodiment of the utility model when the ejector pin fixing plate is retreated to the safe position is shown.

[0025] Among them, the above drawing includes the following reference signs:

[0026] 1, base;2, mounting portion;21, lifting ring;22, vertical section;23, lifting ring screw;3, induction portion;31, induction surface;34, cable;4, adsorption portion;5, indicator lamp;6, fixed portion;7, heightening gasket;8, compression nut;9, plastic mold movable mold plate;91, movable mold fixing plate;92, mounting groove;93, reset spring;94, ejector pin fixing plate;10, ejector pin protection device;11, dustproof plate;12, base body. DETAILED DESCRIPTION

[0027] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] In combination with Figures 1 to 7The utility model provides a top pin protection device, including base 1, installation department 2 and response department 3, installation department 2 sets up on base 1, response department 3 sets up on installation department 2, response department 3 can respond whether top pin fixed plate 94 retreats to safe position, base 1 includes adsorption department 4.

[0029] In the above technical solution, base 1 is the basis of the entire protection device, used for bearing and connecting other components. Base 1 includes an adsorption portion, so that base 1 can be adsorbed on a target plane, achieving installation and fixation of the top pin protection device. Installation portion 2 is used to provide a mounting base for response portion 3, so that response portion 3 can be reliably connected to base 1. Response portion 3 judges whether the top pin has been safely returned by sensing the position of top pin fixed plate 94, thereby preventing the mold from being closed when the top pin has not completely returned, avoiding damage to the mold. The top pin protection device provided by the utility model can be adsorbed and fixed on the surface of the plastic mold through the setting of adsorption portion 4, and can be taken and fixed at any time when it is necessary to adjust the detection position of the top pin protection device or disassemble and replace the top pin protection device, which is more convenient and fast, improving the flexibility of the top pin protection device.

[0030] In an embodiment of the utility model, response portion 3 includes a magnetic induction type proximity switch, and the sensing surface 31 of the magnetic induction type proximity switch is arranged at the first end of response portion 3 and faces the safe position.

[0031] In the above technical solution, the magnetic induction type proximity switch triggers an induction signal by utilizing magnetic field changes, and detects metal objects such as top pin fixed plate 94 at the safe position through a built-in magnetic sensor, thereby judging whether the top pin has returned to the safe position. Since it is a non-contact sensing mode, mechanical wear and poor contact problems are avoided, improving the service life of the switch and the stability of the signal. The sensing surface 31 is the area where the magnetic induction type proximity switch and the top pin fixed plate 94 or other metal components are inducted, ensuring accurate transmission and reception of the induction signal. By arranging the sensing surface 31 at the first end of response portion 3 and facing the safe position, it is ensured that the sensing surface 31 can timely and effectively receive the detection signal when the top pin is completely retreated to the safe position, thereby improving the accuracy and sensitivity of response portion 3 in inducting top pin fixed plate 94.

[0032] In an embodiment of the utility model, the second end of response portion 3 is provided with a mounting hole, and installation portion 2 includes a vertical section 22, and response portion 3 is sleeved on the vertical section 22 through the mounting hole.

[0033] In the technical scheme, the mounting hole provides a sleeving position for the induction part 3 on the vertical section 22, and the induction part 3 is mounted and connected on the mounting part 2 by matching the mounting hole of the induction part 3 with the vertical section 22 of the mounting part 2. The vertical section 22 serves as a support and guide structure of the induction part 3, and ensures the verticality and stability of the induction part 3 during movement adjustment. By sleeving the mounting hole on the vertical section 22, the induction part 3 can move up and down along the vertical section 22, and the distance between the induction surface 31 and the ejector pin fixing plate 94 can be adjusted according to specific needs, so as to adjust the sensitivity and accuracy of induction detection, and make the induction part 3 adapt to ejector pin fixing plates 94 of different heights, thereby improving the adaptability and flexibility of the induction part 3.

[0034] In an embodiment of the present application, the ejector pin protection device is provided with an indicator lamp 5, which is in communication connection with the induction part 3 and indicates the induction state of the induction part.

[0035] In the technical scheme, the indicator lamp 5 is an intuitive signal device, which displays the induction state of the induction part 3 through different colors or flashing modes. When the ejector pin is retracted in place and the magnetic induction type proximity switch senses the ejector pin fixing plate 94, the indicator lamp can light up green, indicating safety. Conversely, if the ejector pin is not completely retracted, the indicator lamp may light up red or not, warning the operator of the safety risk. The communication connection between the induction part 3 and the indicator lamp 5 ensures that the induction signal can be transmitted to the indicator lamp in time and accurately, realizing the visualization of the signal.

[0036] In an embodiment of the present application, the mounting part 2 comprises a lifting ring screw 23, the lifting ring screw 23 comprises a lifting ring 21 and a vertical section 22, and the side of the base 1 facing the mounting part 2 is provided with a fixing part 6, and the vertical section 22 is in threaded connection with the fixing part 6.

[0037] In the technical scheme, the lifting ring 21 part provides an easy-to-operate handle, so that the user can hold the ejector pin protection device and take it off the plastic mold for position adjustment or replacement and maintenance. The fixing part 6 is used to cooperate with the vertical section 22 of the lifting ring screw 23, and the lifting ring screw 23 is fixed on the base 1 through threaded connection, and the fixing part 6 provides sufficient stability for the fixing of the vertical section 22, avoiding the deviation of the induction position of the induction part 3 on the vertical section 22 due to vibration or external force. The vertical section 22 is connected with the fixing part 6 through threads, so as to ensure that the induction part 3 can be stably fixed on the base 1.

[0038] In an embodiment of the present application, the base 1 further comprises a base body 12, and the adsorption part 4 is arranged on the side of the base body 12 away from the mounting part 2.

[0039] In the technical scheme, the base body 12 provides a base platform for the whole ejector pin protection device to bear and fix other components. The suction part 4 is usually a vacuum suction structure such as a suction disc or a magnetic suction structure such as a magnet. By arranging the suction part 4 on the side of the base body 12 away from the mounting part 2, the base 1 has suction capacity, which ensures that the device can be quickly mounted and dismounted on the plastic mold, greatly improving the production efficiency and the flexibility of equipment maintenance.

[0040] In an embodiment of the present application, a heightening gasket 7 is arranged between the fixing part 6 and the sensing part 3, and the heightening gasket 7 can adjust the sensing height of the sensing part 3.

[0041] In the technical scheme, the heightening gasket 7 is inserted between the fixing part 6 and the sensing part 3, so as to change the distance between the sensing surface 31 of the sensing part 3 and the ejector pin fixing plate 94. Usually, the thickness of each gasket is 1mm. By adjusting the number of heightening gaskets 7, the distance between the sensing surface 31 and the ejector pin fixing plate 94 can be finely adjusted, so as to ensure that the sensing part 3 can sense the position of the ejector pin fixing plate 94 within the most suitable distance. The effective sensing distance of the sensing part 3 is 0mm-3mm. The design of the heightening gasket 7 makes the ejector pin protection device adapt to plastic molds of different sizes and types, and improves the universality and adaptability of the device.

[0042] In an embodiment of the present application, an adjusting nut is arranged between the fixing part 6 and the sensing part 3, and the adjusting nut can adjust the sensing height of the sensing part 3.

[0043] In the technical scheme, the sensing part 3 is arranged on the vertical section 22 and in contact with the top of the adjusting nut. The adjusting nut is threadedly connected with the vertical section 22. By rotating the adjusting nut, the position of the adjusting nut on the vertical section 22 can be adjusted, so as to adjust the distance between the sensing part 3 and the ejector pin fixing plate 94, and realize the adjustment of the sensing height of the sensing part 3.

[0044] In an embodiment of the present application, a pressing nut 8 is arranged on the side of the sensing part 3 away from the fixing part 6, and the pressing nut 8 is arranged on the vertical section 22 and presses the sensing part 3.

[0045] In the technical scheme, the pressing nut 8 is arranged on the vertical section 22. By tightening the pressing nut 8, the sensing part 3 can be stably pressed on the fixing part 6, so as to prevent the sensing part 3 from deviating due to vibration or external force.

[0046] In an embodiment of the present application, the sensing surface 31 is arranged on the end face of the sensing part 3 facing the ejector pin fixing plate 94.

[0047] In the above technical scheme, the induction surface 31 is arranged on the end surface of the induction portion 3 facing the ejector pin fixing plate 94, so that when the induction portion 3 cannot be lifted to be higher than the ejector pin fixing plate 94, the induction detection on whether the induction portion 3 reaches the safe position can also be performed from the side surface of the ejector pin fixing plate 94, and the adaptability of the ejector pin protection device is improved.

[0048] In combination with the drawings, Figures 1 to 7 As shown in the drawings, the utility model also provides a plastic mold, including plastic mold movable mold plate 9 and ejector pin protection device 10, and the ejector pin protection device 10 is the ejector pin protection device 10 of the above embodiment, and the ejector pin protection device 10 is adsorbedly connected with the plastic mold movable mold plate 9, and the ejector pin protection device 10 is arranged at the safe position of the ejector pin fixing plate 94 corresponding to the plastic mold movable mold plate 9.

[0049] In the above technical scheme, the plastic mold movable mold plate 9 is the main equipment of injection molding production, contains dynamic mold fixing plate 91, reset spring 93 and ejector pin fixing plate 94 and other key components, is responsible for the closing of mould, opening of mould and the forming of plastic product.The ejector pin protection device 10 is used for monitoring whether the ejector pin is retreated to the safe position under the action of reset spring 93 after ejection, and the ejector pin protection device 10 is adsorbedly connected with the plastic mold movable mold plate 9 through the adsorption portion arranged on the ejector pin protection device 10, so that quick assembly and disassembly can be realized without fixed screw.The ejector pin protection device 10 is arranged at the safe position corresponding to the retreat of the ejector pin fixing plate 94 of the plastic mold movable mold plate 9, so that the mold crushing accident caused by improper position of the ejector pin can be prevented, the safety of production is improved, and the unexpected downtime and equipment maintenance cost are reduced.

[0050] In an embodiment of the utility model, the plastic mold movable mold plate 9 includes dynamic mold fixing plate 91, and the dynamic mold fixing plate 91 is provided with mounting groove 92, and the ejector pin protection device 10 is arranged in the mounting groove 92, and the induction surface of the ejector pin protection device 10 faces the safe position of the ejector pin fixing plate 94.

[0051] In the above technical solution, the movable mold fixed plate 91 is an important component of the plastic mold, and bears one half of the mold. During the mold closing process, the movable mold fixed plate 91 combines with the other half of the plastic mold to form a complete cavity. The movable mold fixed plate 91 also provides a stable mounting base for the ejector pin protection device, ensuring that the ejector pin protection device does not shift due to external forces or vibrations during production, thereby affecting the accuracy and reliability of the detection. The installation groove 92 is a specially designed slot on the movable mold fixed plate 91, used to accommodate the ejector pin protection device 10. By placing the protection device in the installation groove 92, the device can avoid collisions with moving parts during production, and also ensure that the device is tightly attached to the movable mold fixed plate 91, enhancing the stability of the device and reducing the sensing errors caused by position changes. By accurately directing the sensing surface 31 of the ejector pin protection device 10 towards the safe position to which the ejector pin fixed plate 94 needs to retreat after the ejection action is completed, it can ensure that the device can accurately detect the signal when the ejector pin is fully reset, avoiding false positives or false negatives caused by improper distance between the sensing surface 31 and the ejector pin fixed plate 94, and improving the response speed and reliability of the overall protection system.

[0052] In an embodiment of the present application, a dustproof plate 11 is provided between the sensing surface 31 and the so-called ejector pin fixed plate 94.

[0053] In the above technical solution, the dustproof plate 11 acts as a barrier between the sensing surface 31 and the ejector pin fixed plate 94, effectively blocking dust, plastic particles, oil stains and other impurities generated during production from directly contacting the sensing surface 31, avoiding interference with the electromagnetic induction signal emitted by the sensing surface 31, thereby maintaining the sensing accuracy and sensitivity of the sensing part 3. When the sensing part 3 uses a magnetic induction type proximity switch, the dustproof plate 11 should be made of non-metallic material to avoid the metal dustproof plate 11 blocking the magnetic induction signal and causing the sensing part 3 to malfunction; when the sensing part 3 uses an optical proximity switch, the dustproof plate 11 should be made of transparent material to avoid opaque or semi-transparent dustproof plate 11 interfering with the optical induction signal and causing the sensing part 3 to malfunction.

[0054] In an embodiment of the present application, the sensing part 3 also has a cable 34, which includes a power cable and a data transmission cable.

[0055] In the above technical solution, the power supply cable connects the external power supply with the induction part 3, ensuring that the induction part 3 can obtain continuous power supply, thereby ensuring the normal operation of the induction part 3. The data transmission cable is used to transmit the signals generated by the induction part 3 to the control system of the injection molding machine body. Whether it is a confirmation signal that the ejector pin has reached the safe position or an alarm signal in an abnormal situation, it needs to be quickly and accurately transmitted to the control unit of the injection molding machine body through the data transmission cable, so that the control system can respond in time, such as allowing the mold to close or issuing an alarm to stop, to ensure the safety and smoothness of the production process.

[0056] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects: the base 1 is the basis of the entire protection device and is used for bearing and connecting other components. The base 1 includes an adsorption part, so that the base 1 can be adsorbed on the target plane, realizing the installation and fixation of the ejector pin protection device. The installation part 2 is used for providing an installation basis for the induction part 3, so that the induction part 3 can be reliably connected to the base 1. The induction part 3 judges whether the ejector pin has been safely returned by sensing the position of the ejector pin fixing plate 94, thereby preventing the mold from being closed when the ejector pin has not completely returned, and avoiding the damage of the mold. The ejector pin protection device provided by the utility model can be adsorbed and fixed on the surface of the plastic mold through the adsorption part 4, and when it is necessary to adjust the detection position of the ejector pin protection device or disassemble and replace the ejector pin protection device, it can be taken and installed and fixed at any time, which is more convenient and fast, and improves the flexibility of the ejector pin protection device.

[0057] Obviously, the above-described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the utility model.

[0058] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or their combination.

[0059] The above only describes the preferred embodiments of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A needle protection device, characterized in that The device comprises a base (1), a mounting part (2) and a sensing part (3), the mounting part (2) is arranged on the base (1), the sensing part (3) is arranged on the mounting part (2), the sensing part (3) can sense whether the ejector pin fixing plate (94) retreats to a safe position, and the base (1) comprises a suction part (4).

2. The needle protector of claim 1, wherein The sensing part (3) comprises a magnetic induction type proximity switch, and an induction surface (31) of the magnetic induction type proximity switch is arranged at a first end of the sensing part (3) and faces the safe position.

3. The needle protector of claim 1, wherein A second end of the sensing part (3) is provided with a mounting hole, the mounting part (2) comprises a vertical section (22), and the sensing part (3) is sleeved on the vertical section (22) through the mounting hole.

4. The pimna protection device of claim 1, wherein An indicating lamp (5) is arranged on the ejector pin protection device, the indicating lamp (5) is in communication connection with the sensing part (3), and the sensing state of the sensing part is indicated.

5. The pimna protection device of claim 1, wherein The mounting part (2) comprises a lifting ring screw (23), the lifting ring screw (23) comprises a lifting ring (21) and a vertical section (22), one side of the base (1) facing the mounting part (2) is provided with a fixing part (6), the vertical section (22) is in threaded connection with the fixing part (6), and / or the base (1) further comprises a base body (12), and the suction part (4) is arranged on a side of the base body (12) away from the mounting part (2).

6. The needle protector of claim 5, wherein A heightening gasket (7) is arranged between the fixing part (6) and the sensing part (3), and the heightening gasket (7) can adjust the sensing height of the sensing part (3).

7. The needle protector of claim 6, wherein A compression nut (8) is arranged on a side of the sensing part (3) away from the fixing part (6), the compression nut (8) is sleeved on the vertical section (22) and compresses the sensing part (3).

8. A plastic mold characterized by, The device comprises a plastic mold moving die plate (9) and an ejector pin protection device (10), the ejector pin protection device (10) is the ejector pin protection device (10) of any one of claims 1 to 7, the ejector pin protection device (10) is in suction connection with the plastic mold moving die plate (9), and the ejector pin protection device (10) is arranged at a safe position of an ejector pin fixing plate (94) of the plastic mold moving die plate (9).

9. The plastic mold according to claim 8, wherein The plastic mold moving die plate (9) comprises a moving die fixing plate (91), the moving die fixing plate (91) is provided with a mounting groove (92), the ejector pin protection device (10) is arranged in the mounting groove (92), and an induction surface of the ejector pin protection device (10) faces the safe position of the ejector pin fixing plate (94).

10. The plastic mold according to claim 9, wherein A dustproof plate (11) is arranged between the induction surface and the ejector pin fixing plate (94).

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