A demolding device for a plastic product injection mold

Abstract

The application discloses a demolding device for a plastic product injection mold, and relates to the technical field of injection molds, which comprises a movable mold, a fixed mold, a mounting plate, a mold closing cylinder, a mounting frame, a mold core and a demolding unit. The mounting plate is fixed on an injection molding machine and used for mounting and fixing other components. The mold closing cylinder is fixed on the mounting plate and used for driving the movable mold to move and realizing the opening and closing of the mold. The mounting frame is fixed on the end of the piston rod of the mold closing cylinder and is provided with guide rods at four corners. The guide rods pass through the mounting plate and are fixedly connected with the movable mold. The mold core is arranged in the cavity of the movable mold and is provided with a conical structure in the middle, which is used for shaping the injection product. The demolding unit is provided with circumferentially arranged shovel plates outside the mold core and is used for demolding the injection molded product. The device can realize uniform pressure distribution, reduce the risk of scratching or extruding the surface of the product, improve the demolding efficiency, stability and production efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of injection molds, in particular to a demolding device for a plastic product injection mold. BACKGROUND

[0002] The injection mold is a mold for plastic injection molding production, which is used for injecting molten plastic material into a mold cavity and forming a required plastic product after cooling and solidification. The demolding device of the plastic product injection mold is mainly used for safely and efficiently separating the product from the mold after plastic injection molding, and the demolding of the product directly affects the quality of the molded product and the overall production efficiency.

[0003] For the demolding of the plastic product, the Chinese invention patent with the publication number CN118144214B discloses a mobile phone case injection mold convenient for demolding, which comprises a movable mold, a fixed mold, a mounting plate and a demolding device. One side of the mounting plate is fixed with a mold closing cylinder, the piston rod end of the mold closing cylinder is fixed with a mounting bracket, the mounting bracket is fixed with guide rods at four corners, one end of the guide rod is fixedly connected with the movable mold through the mounting plate, and the guide rod is slidably connected with the mounting plate. The center of the movable mold is slidably connected with a slide rod, one end of the slide rod is fixed with a mold core, the movable mold and the fixed mold are provided with a cavity opposite the mold core, and the mold core is arranged in the cavity of the movable mold. One end of the slide rod away from the mold core is slidably connected with a slide sleeve. The demolding device is automatic, which greatly reduces the need for manual intervention, speeds up the production cycle, makes the demolding process fast and accurate, and enables the mobile phone case after injection molding to be quickly separated from the mold, thereby preparing for the next round of injection molding.

[0004] The above scheme improves the work efficiency to a certain extent when demolding the plastic product, but in actual use, since the hook structure of the original demolding hook has a small contact area with the injection molded mobile phone shell during demolding, the pressure during demolding cannot be effectively dispersed and applied to the product surface, which may cause product deformation or damage due to excessive local pressure, increase the risk of scratching or extruding the product surface during demolding, reduce the demolding efficiency and product quality, and cannot guarantee the stability of the product during demolding, thereby affecting the production efficiency. SUMMARY

[0005] The demolding device for the plastic product injection mold provided by the application solves the technical problems of uneven pressure distribution, increased risk of scratching or extruding the product surface, low demolding efficiency, poor stability and affected production efficiency in the prior art, and achieves the technical effects of uniform pressure distribution, reduced risk of scratching or extruding the product surface, improved demolding efficiency, improved stability and improved production efficiency.

[0006] This application provides a demolding device for injection molds of plastic products, including a moving mold, a fixed mold, a mounting plate, a mold closing cylinder, a mounting frame, a mold core, and a demolding unit;

[0007] The mounting plate is fixed to the injection molding machine for mounting and securing other components; the mold clamping cylinder is fixed to the mounting plate for driving the movement of the moving mold and opening and closing the mold; the mounting bracket is fixed to the end of the piston rod of the mold clamping cylinder and has guide rods fixed at its four corners, the guide rods passing through the mounting plate and being fixedly connected to the moving mold; the mold core is set in the cavity of the moving mold and has a conical structure in its middle for shaping the injection molded product.

[0008] The demolding unit has circumferentially arranged spade plates located outside the mold core, used for demolding injection-molded products.

[0009] Furthermore, the demolding unit is used to achieve rapid demolding of the product and includes a connecting plate, a drive plate, and a sliding rod;

[0010] There are two connecting plates, arranged in a mirror image and both fixed on the moving mold; there are four driving plates, each group of driving plates including two driving plates, which are slidably connected to the connecting plate and the inside of the moving mold respectively; the sliding sleeve rod slides inside the moving mold and is located in the middle of the moving mold, used to drive the mold core to move in the cavity.

[0011] Furthermore, one end of the slide rod is connected to the mold core, and the other end is connected to the limiting plate; the limiting plate is fixed on the slide rod, a third spring is sleeved on the outside of the slide rod between the moving mold and the limiting plate, and a second spring is sleeved on the outside of the slide rod between the sliding sleeve rod and the limiting plate; the end of the sliding sleeve rod cooperates with the mounting plate, and the end of the limiting plate cooperates with the moving mold.

[0012] Furthermore, the drive plate has an L-shaped structure and its vertical section is slidably connected to a limit rod via a first spring. A contact ball is fixed at the end of the limit rod near the moving mold. The contact ball is an elastic ball, which is used to limit the movement of the moving mold during the demolding process.

[0013] The horizontal section of the drive plate is connected to a spade plate by a hinge. The spade plate has an arc structure and a pointed structure at the end near the product, which is used to directly contact and lift the injection molded product to achieve demolding.

[0014] Furthermore, four air bladders are fixed on the outer side of the center of the mold core. The air bladders are spliced ​​to form a square structure. The longitudinal cross-section of the air bladder in the fully inflated state is a semi-circular structure, which is used to provide guidance for the shovel plate.

[0015] Furthermore, the airbag is made of flexible rubber material and has multiple air outlets evenly arranged at its top and an air inlet arranged at its bottom.

[0016] Further, the movable mold bottom is fixed with an air pump, which is communicated with the air inlet of the air bag through a pipeline, and is used for providing air power for the air bag.

[0017] Further, the air pump outputs cold air inside, which is used for blowing cooling for the molded product.

[0018] Further, a plurality of blocking blocks are arranged in the air bag, the blocking blocks correspond to the air outlets one by one, the blocking blocks are connected with the inner wall of the air bag through a hinged manner, and the blocking blocks are made of magnetic material.

[0019] Further, a plurality of magnetic balls are uniformly connected with the bottom of the shovel plate through a hinged manner, and the magnetic balls are opposite to the blocking blocks in magnetic property.

[0020] One or more technical solutions provided in the application have at least the following technical effects or advantages:

[0021] By optimizing the demolding structure and adopting the shovel plate structure, the contact area between the demolding structure and the product is increased, the pressure acting on the product can be effectively dispersed and applied to the surface of the product, the risk of product deformation or damage is reduced, the stability of the product during demolding is enhanced, the technical problems of uneven pressure distribution, increased risk of scratching or extrusion of the product surface, low demolding efficiency, poor stability and influence on production efficiency in the prior art are effectively solved, and the technical effects of uniform pressure distribution, reduced risk of scratching or extrusion of the product surface, improved demolding efficiency, improved stability and improved production efficiency are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a whole three-dimensional structure schematic diagram of the demolding device for the plastic product injection mold.

[0023] Figure 2 It is a local three-dimensional structure schematic diagram of the demolding device for the plastic product injection mold.

[0024] Figure 3 It is an inverted three-dimensional structure schematic diagram of the demolding unit of the demolding device for the plastic product injection mold.

[0025] Figure 4 It is a three-dimensional structure schematic diagram of the sliding sleeve rod of the demolding device for the plastic product injection mold.

[0026] Figure 5 It is a full cross-sectional view of the mold core and the air bag of the demolding device for the plastic product injection mold.

[0027] Figure 6 It is a state schematic diagram of the shovel plate of the demolding device for the plastic product injection mold before demolding.

[0028] Figure 7 Figure A is a partial enlarged view of the demolding device for a plastic product injection mold according to the present application.

[0029] Figure 8 Figure B is a partial enlarged view of the demolding device for a plastic product injection mold according to the present application.

[0030] Figure 9 Figure B is a partial enlarged view of the demolding device for a plastic product injection mold according to the present application.

[0031] In the figure: 100, moving mold; 110, fixed mold; 120, mounting plate; 130, mold closing cylinder; 140, mounting frame; 150, guide rod; 160, mold core; 170, air bag; 171, air inlet; 172, air outlet; 173, plug block; 180, air pump; 200, demolding unit; 210, connecting plate; 220, driving plate; 221, limiting rod; 222, first spring; 223, contact ball; 224, shovel plate; 225, magnetic ball; 230, sliding sleeve rod; 231, second spring; 232, limiting plate; 233, third spring; 234, sliding rod. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings, in which preferred embodiments of the present application are shown; however, the present application can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, these embodiments are provided so that the disclosure of the present application can be understood more thoroughly and completely.

[0033] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] Please refer to Figure 1It is a whole three-dimensional structure schematic diagram of the demolding device for the plastic product injection mold; the demolding device for the plastic product injection mold optimizes the demolding structure, changes the demolding hook structure into a shovel plate structure, increases the contact area of the demolding structure and the product, can more effectively disperse the pressure acting on the product during demolding and act on the product surface, reduces the risk of product deformation or damage, enhances the stability of the product during demolding, realizes the technical effects of uniform pressure distribution, reduces the risk of scratching or extrusion on the product surface, improves the demolding efficiency, improves the stability, and improves the production efficiency.

[0036] Embodiment one: as shown in the figure, the demolding device for the plastic product injection mold is characterized in that it comprises a movable mold 100, a fixed mold 110, a mounting plate 120, a mold closing cylinder 130, a mounting frame 140, a mold core 160, and a demolding unit 200; Figures 1-3

[0037] The mounting plate 120 is fixed on the injection molding machine and is used for mounting and fixing other components;

[0038] The mold closing cylinder 130 is fixed on the mounting plate 120 and is used for driving the movement of the movable mold 100 and realizing the opening and closing of the mold;

[0039] The mounting frame 140 is fixed on the piston rod end of the mold closing cylinder 130, and guide rods 150 are fixed on the four corners of the mounting frame 140; the guide rods 150 pass through the mounting plate 120 and are fixedly connected with the movable mold 100;

[0040] The mold core 160 is arranged in the cavity of the movable mold 100 and has a conical structure in the middle, which is used for shaping the injection molded product;

[0041] The demolding unit 200 is provided with circumferentially arranged shovel plates 224 and is located outside the mold core 160, which is used for demolding the injection molded product.

[0042] The demolding unit 200 is used for realizing the rapid demolding of the product and comprises a connecting plate 210, a driving plate 220, and a sliding sleeve rod 230;

[0043] The connecting plate 210 is provided with two mirror image arrangements and is fixed on the movable mold 100;

[0044] The driving plate 220 is provided with four driving plates 220, each group of driving plates 220 comprises two driving plates 220, and is slidingly connected inside the connecting plate 210 and the movable mold 100;

[0045] The sliding sleeve rod 230 is slidingly arranged inside the movable mold 100 and is located in the middle of the movable mold 100, which is used for driving the mold core 160 to move in the cavity.

[0046] ​The sliding sleeve rod 230 is slidably connected with a sliding rod 234, one end of the sliding rod 234 is connected with the mold core 160, and the other end is connected with the limiting plate 232; the limiting plate 232 is fixed on the sliding rod 234, the third spring 233 is sleeved between the sliding rod 234 and the limiting plate 232 outside the sliding sleeve rod 230 and the limiting plate 232, and the second spring 231 is sleeved between the sliding rod 234 and the limiting plate 232 outside the sliding sleeve rod 230 and the limiting plate 232; the end of the sliding sleeve rod 230 is matched with the mounting plate 120, and the end of the limiting plate 232 is matched with the movable mold 100.

[0047] The driving plate 220 is an L-shaped structure, and the vertical section of the driving plate 220 is slidably connected with a limiting rod 221 through a first spring 222, one end of the limiting rod 221 close to the movable mold 100 is fixed with a contact ball 223, the contact ball 223 is an elastic ball, and is used for abutting against the movable mold 100 during demolding to play a limiting role;

[0048] The horizontal section of the driving plate 220 is connected with a shovel plate 224 in a hinged manner, the shovel plate 224 is an arc-shaped structure, one end close to the product is a pointed end structure, is used for directly contacting and shoveling the injection molding product, and realizes demolding.

[0049] The application adopts the shovel plate 224 in the shovel structure and combines the design of the conical mold core 160, not only increases the contact area with the product during demolding, but also makes the demolding force uniformly distributed, reduces the risk of product deformation or damage, enhances the stability of the product during demolding, ensures the smooth operation of the production process, and thus improves the demolding efficiency and product quality.

[0050] In actual operation, the application embodiment has the following steps:

[0051] Step one: after injection molding is completed, the mold closing cylinder 130 starts to work, drives the movable mold 100 to move downward through the mounting frame 140 and the guide rod 150, the distance between the mounting plate 120 and the movable mold 100 gradually becomes smaller, and the mold opening operation is realized;

[0052] Step two: when the mounting plate 120 contacts the end of the sliding sleeve rod 230, the second spring 231 and the third spring 233 are extruded, and the sliding rod 234 drives the mold core 160 to stably move out of the cavity of the movable mold 100;

[0053] Step three: as the mounting plate 120 continues to approach the movable mold 100, the mounting plate 120 contacts the driving plate 220 and compresses the first spring 222, because the driving plate 220 moves in the guide groove on the connecting plate 210, the driving plate 220 starts to move along the inclined part of the guide groove;

[0054] Step four: when the driving plate 220 moves to the connection of the inclined part and the vertical part of the guide groove, the shovel plate 224 moves along the middle inclined surface structure of the mold core 160 smoothly and closely adheres to the edge of the mobile phone cover injection molding part, and then demolding is performed;

[0055] Step five: when the driving plate 220 is completely moved into the vertical part of the guide groove as the distance between the mounting plate 120 and the movable mold 100 continues to decrease, the shovel plate 224 shovels the mobile phone cover injection molding part from the mold core 160 and removes it, at this time, the injection molding product maintains the complete shape and the surface is not obviously damaged due to uniform stress, and finally, through the contraction of the clamping cylinder 130, the movable mold 100 and the fixed mold 110 are re-clamped, and the mold parts are reset, preparing for the next injection molding cycle.

[0056] The technical solutions in the embodiments of the application have at least the following technical effects or advantages:

[0057] The technical problems of uneven pressure distribution, increased risk of scratching or extruding the product surface, low demolding efficiency, poor stability and affected production efficiency in the prior art are solved, and the technical effects of uniform pressure distribution, reduced risk of scratching or extruding the product surface, improved demolding efficiency, improved stability and improved production efficiency are achieved.

[0058] Embodiment two: in order to further improve the demolding effect of the shovel plate 224 on the product and improve the smoothness of the demolding process, while avoiding the phenomenon of jamming, the application proposes the following technical solutions to solve the above technical problems, specifically:

[0059] As shown in Figure 4 and Figure 5 , four air bags 170 are fixed on the outside of the middle part of the mold core 160, the air bags 170 form a square structure after splicing, and the longitudinal section of the air bag 170 in the fully inflated state is a semicircular structure, which is used to provide a guiding effect for the shovel plate 224.

[0060] In this embodiment, a plurality of air bags 170 are arranged outside the middle part structure of the mold core 160, and the guiding effect of the air bag 170 makes the shovel plate 224 move more smoothly during demolding, effectively improving the smoothness during demolding and avoiding the phenomenon of jamming that may occur in the traditional demolding method. At the same time, the guiding effect of the air bag 170 makes the shovel plate 224 more accurately demold along the conical structure of the mold core 160, improves the demolding efficiency and product quality, and avoids product damage. In addition, the cooling effect of the cold air provided by the air pump 180 further protects the shape and performance of the injection molding product from being affected by heat, achieving an efficient and damage-free demolding process.

[0061] In order to avoid product damage and improve the quality of the molded product, the present application proposes the following technical solutions to solve the above technical problems, specifically:

[0062] As shown in Figures 4-7 The air bag 170 is made of flexible rubber material and is uniformly provided with a plurality of gas outlets 172 at the top end and a gas inlet 171 at the bottom end.

[0063] The movable mold 100 is fixed at the bottom of the air pump 180, which is communicated with the gas inlet 171 of the air bag 170 through a pipeline, and is used to provide gas power for the air bag 170.

[0064] The air pump 180 outputs cold gas inside, which is used for blow cooling of the molded product.

[0065] By adding the air pump 180 and the air bag 170, the molded product is cooled by cold gas, effectively solving the problem of easy deformation of the molded product under high temperature, improving the demolding efficiency and product quality, and reducing the need for manual intervention in the automatic demolding process, speeding up the production cycle and reducing the risk of work accidents.

[0066] In order to make the product more easily and easily separated from the mold, while reducing the manufacturing cost and maintenance difficulty, the present application proposes the following technical solutions to solve the above technical problems, specifically:

[0067] As shown in Figures 6-9 The air bag 170 is provided with a plurality of blocking blocks 173 inside, the blocking blocks 173 correspond to the gas outlets 172 one by one, the blocking blocks 173 are connected with the inner wall of the air bag 170 by hinged way, and the blocking blocks 173 are made of magnetic material.

[0068] The bottom of the shovel plate 224 is uniformly connected with a plurality of magnetic balls 225 by hinged way, and the magnetic balls 225 are opposite to the blocking blocks 173 in magnetic property.

[0069] Before demolding, the air bag 170 is in a dynamic synchronous inflation and deflation state; when the shovel plate 224 starts to demold the product, the shovel plate 224 moves along the mold core 160 and extrudes the air bag 170, the magnetic ball 225 moves on the air bag 170 along with the shovel plate 224, the magnetic ball 225 cooperates with the blocking block 173, during the extrusion of the air bag 170, the blocking block 173 moves to the position corresponding to the air outlet 172 and blocks the corresponding air outlet 172, at this time, the air bag 170 is in a cold gas inflation state, which is convenient for demolding; after demolding, the shovel plate 224 moves upward to be not in contact with the air bag 170, the magnetic ball 225 cooperates with the blocking block 173, the blocking block 173 is separated from the air outlet 172, at this time, the air bag 170 is in a dynamic synchronous inflation and deflation state.

[0070] The application realizes automatic opening and closing of the air outlet 172 through magnetic interaction, simplifies the equipment structure, and reduces the cost. The cooperation of the magnetic blocking block 173 and the magnetic ball 225 is a non-contact connection mode, which reduces mechanical wear and failure rate. Meanwhile, the magnetic control mechanism has strong adaptability to the environment and is not easily affected by external factors such as temperature and humidity, thereby improving the reliability and durability of the mold.

[0071] The above only describes the preferred embodiments of the application and is not used to limit the application. The application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A demolding device for injection molds of plastic products, characterized in that, It comprises a movable mold (100), a fixed mold (110), a mounting plate (120), a mold closing cylinder (130), a mounting frame (140), a mold core (160) and a demolding unit (200); The mounting plate (120) is fixed on an injection molding machine and used for mounting and fixing other components; the mold closing cylinder (130) is fixed on the mounting plate (120) and used for driving the movement of the movable mold (100) and realizing the opening and closing of the mold; the mounting frame (140) is fixed on the piston rod end of the mold closing cylinder (130) and four guide rods (150) are fixed on the four corners of the mounting frame (140); the guide rods (150) pass through the mounting plate (120) and are fixedly connected with the movable mold (100); the mold core (160) is arranged in the cavity of the movable mold (100) and the middle part of the mold core (160) is a conical structure, which is used for shaping the injection molding product; The demolding unit (200) is provided with circumferentially arranged shovel plates (224) outside the mold core (160) and is used for demolding the injection molded product; Four air bags (170) are fixed outside the middle part of the mold core (160); the air bags (170) are connected in series to form a square structure; the longitudinal section of the air bag (170) in the fully inflated state is a semicircular structure, which is used for providing a guiding effect for the shovel plate (224).

2. The demolding device for a plastic product injection mold according to claim 1, wherein The demolding unit (200) is used for realizing the rapid demolding of the product and comprises a connecting plate (210), a driving plate (220) and a sliding sleeve rod (230); The connecting plate (210) is provided with two mirror image connecting plates (210) and is fixed on the movable mold (100); the driving plate (220) is provided with four driving plates (220), each group of driving plates (220) comprises two driving plates (220) which are slidingly connected inside the connecting plate (210) and the movable mold (100); the sliding sleeve rod (230) is slidingly arranged inside the movable mold (100) and located in the middle part of the movable mold (100) and is used for driving the mold core (160) to move in the cavity.

3. The demolding device for a plastic product injection mold according to claim 2, wherein The sliding sleeve rod (230) is slidingly connected with a sliding rod (234) above; one end of the sliding rod (234) is connected with the mold core (160) and the other end is connected with a limiting plate (232); the limiting plate (232) is fixed on the sliding rod (234); a third spring (233) is arranged between the outside of the sliding rod (234) and the movable mold (100) and the limiting plate (232); a second spring (231) is arranged between the outside of the sliding rod (234) and the sliding sleeve rod (230) and the limiting plate (232); the end of the sliding sleeve rod (230) is matched with the mounting plate (120) and the end of the limiting plate (232) is matched with the movable mold (100).

4. The demolding device for a plastic product injection mold according to claim 3, wherein The driving plate (220) is an L-shaped structure and the vertical section of the driving plate (220) is slidingly connected with a limiting rod (221) through a first spring (222); a contact ball (223) is fixed on the end of the limiting rod (221) close to the movable mold (100); the contact ball (223) is an elastic ball and is used for limiting the demolding process and the movable mold (100). The driving plate (220) is connected with a shovel plate (224) through a hinged way, the shovel plate (224) is an arc structure and is a pointed end structure near one end of the product, is used for directly contacting and shoveling the injection molding product, and realizes demolding.

5. The demolding device for a plastic product injection mold according to claim 1, wherein The air bag (170) is made of flexible rubber material and is uniformly provided with a plurality of gas outlets (172) at the top end and a gas inlet (171) at the bottom end.

6. A demolding device for a plastic product injection mold according to claim 5, wherein The movable mold (100) is fixed with an air pump (180) at the bottom, the air pump (180) is communicated with the gas inlet (171) on the air bag (170) through a pipeline, and is used for providing gas power for the air bag (170).

7. A demolding device for a plastic injection mold according to claim 6, characterized in that The air pump (180) outputs cold gas inside, and is used for blow cooling of the formed product.

8. The demolding device for a plastic product injection mold according to claim 6, wherein The air bag (170) is provided with a plurality of plug blocks (173) inside, the plug blocks (173) correspond to the gas outlets (172) one by one, the plug blocks (173) are connected with the inner wall of the air bag (170) through a hinged way, and the plug blocks (173) are magnetic materials.

9. The demolding device for a plastic injection mold according to claim 8, wherein The bottom of the shovel plate (224) is uniformly connected with a plurality of magnetic balls (225) through a hinged way, and the magnetic balls (225) are opposite to the plug blocks (173) in magnetic property.

Images