Multi-directional positioning stamping die for plastic product and forming method

Abstract

The invention relates to the field of plastic product forming, in particular to a multi-directional positioning stamping die for a plastic product and a forming method. The device further comprises a hydraulic cylinder. The fixing frame is fixedly connected with a hydraulic cylinder; the telescopic end of the hydraulic cylinder is fixedly connected with an upper die; the upper mold is fixedly connected with an injection pipe; the fixing frame is rotationally connected with a bearing plate and connected with a motor, and an output shaft of the motor is fixedly connected with the bearing plate. A motor is controlled to drive a bearing plate and parts on the bearing plate to turn over by 180 degrees, so that a spray pipe faces upwards and is aligned to the lower side of an upper mold, a lower mold faces downwards at the moment, then an electric lifting type soaking hopper is controlled to move upwards till the lower surface of the lower mold completely enters a liquid release agent in the soaking hopper, and the lower surface of the lower mold is evenly covered with the release agent; then, an external pump is controlled to spray out a liquid release agent upwards through a spray pipe, the lower side of the upper mold is covered with the release agent, the lower mold faces downwards at the moment, so that the release agent cannot fall onto the lower mold, and it is ensured that the upper mold and the lower mold are evenly covered with the release agent.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of plastic product forming, in particular to a multi-directional positioning stamping die for plastic products and a forming method. BACKGROUND

[0002] Plastic products need to be subjected to stamping injection molding during production. Before injection molding, in order to ensure smooth demolding without sticking to the mold, a demolding agent needs to be sprayed onto the upper mold and the lower mold. In the prior art, when the demolding agent is sprayed, the excess demolding agent that falls off the upper mold will fall onto the lower mold below, resulting in uneven spraying of the demolding agent and affecting the demolding effect. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, in which the excess demolding agent that falls off the upper mold will fall onto the lower mold below when the demolding agent is sprayed, resulting in uneven spraying of the demolding agent and affecting the demolding effect, the present application provides a multi-directional positioning stamping die for plastic products and a forming method.

[0004] The technical implementation of the present application is as follows: a multi-directional positioning stamping die for plastic products, comprising a fixing frame, a hydraulic cylinder, the fixing frame being fixedly connected with the hydraulic cylinder, the hydraulic cylinder being fixedly connected with an upper mold at the extension end thereof, the upper mold being fixedly connected with an injection pipe, the fixing frame being rotatably connected with a supporting plate, the fixing frame being connected with a motor, the output shaft of the motor being fixedly connected with the supporting plate, the supporting plate being fixedly connected with a lower mold, the lower mold being below the upper mold, a mold cavity being formed between the upper side of the upper mold and the lower side of the lower mold when the upper mold moves downward and contacts the supporting plate, the fixing frame being fixedly connected with an electrically-operated lifting type soaking pot, the soaking pot being below the lower mold, the lower mold being fixedly connected with a spray pipe, the upper mold being connected with a demolding assembly for demolding a mobile phone shell, the demolding assembly being connected with the lower mold.

[0005] More preferably, the multi-directional positioning stamping die further comprises a cleaning pipe and a cleaning brush, the lower mold is fixedly connected with a plurality of spray pipes, and the supporting plate is fixedly connected with a plurality of cleaning brushes.

[0006] More preferably, the multi-directional positioning stamping die further comprises an electric push rod I and a steel stamp head, the lower mold is fixedly connected with the electric push rod I, the extension end of the electric push rod I is detachably connected with the steel stamp head, and the steel stamp head is internally provided with an electric heating module.

[0007] More preferably, the multi-directional positioning stamping die further comprises a rubber sheet and an elastic cloth, the lower mold is fixedly connected with a plurality of elastic cloths, and the lower side of the lower mold is fixedly connected with a plurality of rubber sheets, the rubber sheets covering the surface of the steel stamp head.

[0008] More preferably, the demolding assembly comprises electric push rod II, push plate, elastic plate, electric push rod III, rectangular plate I, convex pipe I, electric push rod IV, rectangular plate II and convex pipe II; a plurality of electric push rod II are fixedly connected to the lower mold; the telescopic ends of all electric push rod II are fixedly connected with the push plate, and the push plate is in contact with the lower mold; the supporting plate is fixedly connected with the elastic plate; the upper mold is provided with an outer channel; the upper mold is fixedly connected with the air inlet pipe, and the air inlet pipe is in communication with the outer channel; the upper mold is fixedly connected with the air outlet pipe, and the air outlet pipe is in communication with the outer channel; the upper mold is fixedly connected with the electric push rod III; the telescopic end of the electric push rod III is connected with the rectangular plate I, and the rectangular plate I slides in the outer channel; the rectangular plate I is fixedly connected with the convex pipe I; the upper mold is fixedly connected with the electric push rod IV; the telescopic end of the electric push rod IV is connected with the rectangular plate II; the rectangular plate II is fixedly connected with the convex pipe II.

[0009] More preferably, the outer side surface of the push plate is smooth.

[0010] More preferably, it further comprises a telescopic ring; the lower mold is fixedly connected with a high-temperature-resistant telescopic ring, and the telescopic ring is fixedly connected with the push plate.

[0011] More preferably, the convex pipe I and the convex pipe II are both hollow.

[0012] More preferably, it further comprises spring plate I, round rod I, spring sealing plate I, spring plate II, spring sealing plate II and round rod II; the telescopic end of the electric push rod III is fixedly connected with the spring plate I, and the spring of the spring plate I is fixedly connected with the rectangular plate; the lower mold is provided with an inner channel; the lower mold is slidingly connected with the spring sealing plate I, and the spring sealing plate I is located in the inner channel; the spring plate I is fixedly connected with the round rod I, and the round rod I passes through the convex pipe I; the telescopic end of the electric push rod IV is fixedly connected with the spring plate II, and the spring of the spring plate II is fixedly connected with the rectangular plate II; the lower mold is slidingly connected with the spring sealing plate II, and the spring sealing plate II is located in the inner channel; the spring plate II is fixedly connected with the round rod II, and the round rod II passes through the convex pipe II.

[0013] A forming method of a multi-directional positioning stamping die for plastic products comprises the following steps: one, by driving the supporting plate and the parts thereon to turn over by 180 degrees, the nozzle is aligned with the lower side of the upper mold upward, and the lower mold is downward at this time; two, control the electric lifting type soaking pot to move upward until the lower surface of the lower mold is completely immersed in the liquid release agent in the soaking pot, so that the lower surface of the lower mold is evenly covered with the release agent; three, control the external pump to spray liquid release agent upward through the nozzle, so that the release agent covers the lower side of the upper mold; four, control the electric lifting type soaking pot to move down to the initial position, then control the motor to drive the supporting plate and the parts thereon to turn over by 180 degrees again, so that the lower mold is upward; five, control the external delivery pump to inject high-temperature molten injection liquid into the cavity through the injection pipe, and then separate the injection-molded mobile phone shell from the upper mold and the lower mold after cooling through the demolding assembly.

[0014] Compared with the prior art, the present application has the following advantages: the present application controls the motor to drive the supporting plate and the parts thereon to overturn 180 degrees, so that the spray pipe is aligned with the upper side of the upper mold, while the lower mold is downward, then the electric lifting type soaking pot is controlled to move upward until the lower surface of the lower mold is completely immersed in the liquid release agent in the soaking pot, so that the lower surface of the lower mold is uniformly covered with the release agent, then the external pump sprays the liquid release agent upward through the spray pipe, so that the release agent covers the lower side of the upper mold, and since the lower mold is downward at this time, the release agent will not fall on the lower mold, ensuring that the upper mold and the lower mold are uniformly covered with the release agent.

[0015] After the injection molding is completed, the release assembly is controlled to drive the hydraulic cylinder to move the upper mold and the mobile phone shell upward, so that the lower mold is separated from the mobile phone shell, then the motor is controlled to drive the supporting plate and the parts thereon to overturn 180 degrees, so that the stamp head is aligned with the inner lower side of the mobile phone shell, then the electric heating module in the stamp head is powered, so that the electric heating module heats the stamp head, then the electric push rod I is controlled to drive the stamp head to move upward until the stamp head is tightly attached to the specified position on the inner lower side of the mobile phone shell, and the stamp head marks the stamp on the inner lower side of the mobile phone shell, when the stamp is replaced, the stamp head can be simply replaced, and since the stamp head is on the lower side of the lower mold, the integrity of the upper surface of the lower mold is not damaged, ensuring the molding effect of the mobile phone shell.

[0016] The electric push rod II is controlled to drive the push plate to move downward, the push plate pushes the convex edge outward, the convex edge is deformed under the action of its own elastic force, the push plate extrudes the elastic plate downward, the spring of the elastic plate is compressed, and the convex edge is temporarily separated from the lower mold, then the hydraulic cylinder is controlled to drive the upper mold, the rectangular plate I and the convex pipe I to move the mobile phone shell upward, so that the mobile phone shell is separated from the lower mold, then the electric push rod III is controlled to drive the rectangular plate I to drive the convex pipe I to shrink inward into the outer channel, so that the convex pipe I is separated from the mobile phone shell, at the same time, the electric push rod IV is controlled to drive the rectangular plate II to drive the convex pipe II to shrink inward into the outer channel, so that the convex pipe II is separated from the mobile phone shell, so that the mobile phone shell is separated from the lower surface of the lower mold under the action of its own gravity, and the demolding of the mobile phone shell is completed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure schematic view disclosed by the present application for the multi-directional positioning stamping die for plastic products and the molding method; Figure 2 The structure schematic view of the mobile phone shell disclosed by the present application for the multi-directional positioning stamping die for plastic products; Figure 3 The sectional view of the upper mold disclosed by the present application for the multi-directional positioning stamping die for plastic products and the molding method; Figure 4 The combined sectional view of the upper mold and the lower mold disclosed by the present application for the multi-directional positioning stamping die for plastic products and the molding method; Figure 5 The disclosed flip state diagram for the multi-directional positioning stamping die and molding method of plastic products of the present application; Figure 6 The disclosed flip state diagram for the multi-directional positioning stamping die and molding method of plastic products of the present application; Figure 7 The first partial structure diagram of the disclosed demolding assembly for the multi-directional positioning stamping die and molding method of plastic products of the present application; Figure 8 The combined partial structure diagram of the disclosed outer channel and inner channel for the multi-directional positioning stamping die and molding method of plastic products of the present application; Figure 9 The second partial structure diagram of the disclosed demolding assembly for the multi-directional positioning stamping die and molding method of plastic products of the present application.

[0018] Among them, the above-mentioned drawings include the following reference signs: 1 - fixed frame, 2 - mobile phone shell, 101 - hydraulic cylinder, 102 - upper die, 103 - injection pipe, 104 - supporting plate, 105 - lower die, 106 - soaking hopper, 107 - spray pipe, 108 - cleaning pipe, 109 - cleaning brush, 1010 - electric push rod I, 1011 - steel stamp head, 1012 - rubber sheet, 1013 - elastic cloth, 201 - electric push rod II, 202 - push plate, 203 - elastic plate, 204 - electric push rod III, 205 - rectangular plate I, 206 - convex pipe I, 207 - spring plate I, 208 - round rod I, 209 - spring sealing plate I, 2010 - electric push rod IV, 2011 - rectangular plate II, 2012 - convex pipe II, 2013 - spring plate II, 2014 - spring sealing plate II, 2015 - telescopic ring, 2016 - round rod II, 11 - cavity, 12 - outer channel, 13 - inner channel, 21 - convex edge, 22 - charging hole, 23 - round hole, 31 - air inlet pipe, 32 - exhaust pipe. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] Embodiment 1: A multi-directional positioning stamping die for plastic products, as shown in the figure, comprising a fixed frame 1; Figures 1-9 ​The utility model also includes hydraulic cylinder 101, upper die 102, injection pipe 103, support plate 104, lower die 105, soaking hopper 106, spray pipe 107 and demoulding assembly, fixed frame 1 is bolted with hydraulic cylinder 101, the telescopic end of hydraulic cylinder 101 is fixedly connected with upper die 102, upper die 102 is fixedly connected with injection pipe 103, fixed frame 1 is rotatably connected with support plate 104, fixed frame 1 is connected with motor, and the output shaft of motor is fixedly connected with support plate 104, support plate 104 is fixedly connected with lower die 105, and lower die 105 is below upper die 102, when upper die 102 is in contact with support plate 104, the cavity 11 is formed between the upper side of upper die 102 and the lower side of lower die 105, fixed frame 1 is fixedly connected with electric lifting type soaking hopper 106, and soaking hopper 106 is below lower die 105, the lower side of lower die 105 is fixedly connected with spray pipe 107, and upper die 102 is connected with.

[0021] The utility model also includes cleaning pipe 108 and cleaning brush 109, the lower side of lower die 105 is fixedly connected with two spray pipes 107, and the lower side of support plate 104 is fixedly connected with several cleaning brushes 109.

[0022] The utility model also includes electric push rod I 1010 and steel stamp head 1011, the recess of the lower side of lower die 105 is fixedly connected with electric push rod I 1010, the telescopic end of electric push rod I 1010 is detachably connected with steel stamp head 1011, and steel stamp head 1011 is internally provided with electric heating module.

[0023] The utility model also includes rubber sheet 1012 and elastic cloth 1013, the recess of the lower side of lower die 105 is fixedly connected with two elastic cloths 1013, and the lower side of lower die 105 is fixedly connected with two rubber sheets 1012, and the rubber sheet 1012 covers the surface of steel stamp head 1011.

[0024] When using, the external delivery pump is communicated to injection pipe 103, the external pump machine is communicated with spray pipe 107, then liquid release agent is injected into soaking hopper 106, before injection molding, first control hydraulic cylinder 101 to drive upper die 102 to move up to the specified height, then control electric lifting type soaking hopper 106 to move down to the specified height, then control motor to drive support plate 104 and the parts thereon to overturn one hundred and eighty degrees, so that spray pipe 107 is upwardly aligned with the lower side of upper die 102, and lower die 105 is downward at this time, then control electric lifting type soaking hopper 106 to move up until the lower surface of lower die 105 is completely in the liquid release agent in soaking hopper 106, so that the lower surface of lower die 105 is evenly covered with release agent, then control external pump machine to spray liquid release agent upward through spray pipe 107, so that the release agent is covered on the lower side of upper die 102, since lower die 105 is downward at this time, therefore the release agent will not fall on lower die 105, ensure that upper die 102 and lower die 105 are evenly covered with release agent.

[0025] Subsequently, the electric lifting type soaking pot 106 is controlled to move down to the initial position, then the motor is controlled to drive the supporting plate 104 and the parts thereon to flip by 180 degrees again, so that the lower mold 105 faces upward, then the hydraulic cylinder 101 is controlled to drive the upper mold 102 to move down to contact the upper side of the supporting plate 104, so that the mold cavity 11 is formed between the upper mold 102 and the lower mold 105, then the external delivery pump is controlled to inject the high-temperature molten injection liquid into the mold cavity 11 through the injection pipe 103, and after cooling by the demolding assembly, the injection-molded mobile phone shell 2 is separated from the upper mold 102 and the lower mold 105 by the demolding assembly.

[0026] After the injection molding and demolding are completed, the upper side of the upper mold 102 and the lower side of the lower mold 105 will be attached with a lot of slag. In the prior art, when the slag on the lower side of the lower mold 105 is cleaned, the slag is easy to fall onto the upper side of the upper mold 102. Therefore, after the injection molding and demolding are completed, the hydraulic cylinder 101 is first controlled to drive the upper mold 102 to move up to a specified height, and then the electric lifting type soaking pot 106 is controlled to move down to a specified height, then the motor is controlled to drive the supporting plate 104 and the parts thereon to flip by 180 degrees, so that the cleaning pipe 108 and the cleaning brush 109 are aligned with the lower side of the upper mold 102, then the hydraulic cylinder 101 is controlled to drive the upper mold 102 to move down until the cleaning brush 109 completely enters the lower side of the upper mold 102, then the hydraulic cylinder 101 is controlled to drive the upper mold 102 to move vertically and reciprocally, and the moving distance is the depth of the lower side of the upper mold 102, so that the cleaning brush 109 moves relative to the lower side of the upper mold 102. The cleaning brush 109 brushes off the slag on the lower side of the upper mold 102, then the external air blowing pump is controlled to blow air to the lower side of the upper mold 102 through the cleaning pipe 108 to blow away the slag. Since the lower mold 105 faces downward at this time, the falling slag will not adhere to the lower mold 105. At this time, the operator only needs to clean the lower side of the lower mold 105.

[0027] In view of the need to stamp the batch date of the mobile phone shell 2 during injection molding, and the stamping in the prior art is engraved on the mold, when stamping mobile phone shells 2 of different batches, different molds need to be replaced, which reduces production efficiency. To solve this problem, after injection molding is completed, the demolding assembly is controlled to make the hydraulic cylinder 101 drive the upper mold 102 and the mobile phone shell 2 to move upwards, first separate the lower mold 105 from the mobile phone shell 2, then control the motor to drive the supporting plate 104 and the parts on it to flip 180 degrees, so that the stamping head 1011 is aligned upwards with the inner lower side of the mobile phone shell 2, then power the electric heating module inside the stamping head 1011 to heat the stamping head 1011, then control the electric push rod I 1010 to drive the stamping head 1011 to move upwards until the stamping head 1011 is tightly attached to the specified position on the inner lower side of the mobile phone shell 2, and then the stamping head 1011 stamps the stamp on the inner lower side of the mobile phone shell 2. When replacing the stamp, you only need to replace the stamping head 1011. At the same time, since the stamping head 1011 is below the lower mold 105, it will not damage the integrity of the upper surface of the lower mold 105, ensuring the molding effect of the mobile phone shell 2.

[0028] Further considering that when the cleaning pipe 108 and the cleaning brush 109 clean the lower side of the lower mold 105, debris will fall onto the surface of the stamping head 1011. Therefore, when the stamping head 1011 is not in use, the surface of the stamping head 1011 is covered with a rubber sheet 1012 for protection. When the stamping head 1011 moves upwards, the rubber sheet 1012 is pushed away. The rubber sheet 1012 deforms adaptively. To facilitate the stamping head 1011 to be covered by the rubber sheet 1012 when it moves downwards, the stamping head 1011 stretches the elastic cloth 1013 when it moves upwards, so that the elastic cloth 1013 always limits the rubber sheet 1012. After the stamping head 1011 moves upwards, the rubber sheet 1012 rebounds to the lower side of the stamping head 1011, which is not conducive to the reset of the stamping head 1011.

[0029] In example 2, based on example 1, Figures 7-9As shown, the demolding assembly comprises electric push rod II 201, push plate 202, elastic plate 203, electric push rod III 204, rectangular plate I 205, convex pipe I 206, electric push rod IV 2010, rectangular plate II 2011 and convex pipe II 2012; the lower mold 105 is fixedly connected with two electric push rod II 201; the telescopic ends of all electric push rod II 201 are fixedly connected with the push plate 202, and the push plate 202 is in contact with the lower mold 105; the supporting plate 104 is fixedly connected with the elastic plate 203; the upper mold 102 is provided with an annularly arranged outer channel 12; the upper mold 102 is fixedly connected with the air inlet pipe 31, and the air inlet pipe 31 is in communication with the outer channel 12; the upper mold 102 is fixedly connected with the air outlet pipe 32, and the air outlet pipe 32 is in communication with the outer channel 12; the upper mold 102 is bolted with the electric push rod III 204; the telescopic end of the electric push rod III 204 is connected with the rectangular plate I 205, and the rectangular plate I 205 slides in the outer channel 12; the rectangular plate I 205 is fixedly connected with the convex pipe I 206; the upper mold 102 is bolted with the electric push rod IV 2010; the telescopic end of the electric push rod IV 2010 is connected with the rectangular plate II 2011; the rectangular plate II 2011 is fixedly connected with the convex pipe II 2012.

[0030] The outer side surface of the push plate 202 is annularly and smoothly arranged.

[0031] Further comprising telescopic ring 2015; the lower mold 105 is fixedly connected with the telescopic ring 2015, and the telescopic ring 2015 is fixedly connected with the push plate 202.

[0032] The convex pipe I 206 and the convex pipe II 2012 are both hollowly arranged.

[0033] Further comprising spring plate I 207, round rod I 208, spring sealing plate I 209, spring plate II 2013, spring sealing plate II 2014 and round rod II 2016; the telescopic end of the electric push rod III 204 is fixedly connected with the spring plate I 207, and the spring of the spring plate I 207 is fixedly connected with the rectangular plate; the lower mold 105 is provided with an annularly arranged inner channel 13; the lower mold 105 is slidingly connected with the spring sealing plate I 209, and the spring sealing plate I 209 is located in the inner channel 13; the spring plate I 207 is fixedly connected with the round rod I 208, and the round rod I 208 passes through the convex pipe I 206; the telescopic end of the electric push rod IV 2010 is fixedly connected with the spring plate II 2013, and the spring of the spring plate II 2013 is fixedly connected with the rectangular plate II 2011; the lower mold 105 is slidingly connected with the spring sealing plate II 2014, and the spring sealing plate II 2014 is located in the inner channel 13; the spring plate II 2013 is fixedly connected with the round rod II 2016, and the round rod II 2016 passes through the convex pipe II 2012.

[0034] A forming method of a multi-directional positioning stamping die for plastic products includes the following steps: 1. The supporting plate 104 and the parts thereon are turned over by 180 degrees, so that the nozzle 107 is aligned with the upper die 102 on the lower side, and the lower die 105 is downward at this time; 2. The electric lifting type immersion tank 106 is controlled to move upward until the lower surface of the lower die 105 is completely immersed in the liquid release agent in the immersion tank 106, so that the lower surface of the lower die 105 is uniformly covered with the release agent; 3. The external pump machine sprays the liquid release agent upward through the nozzle 107, so that the release agent is covered on the lower side of the upper die 102; 4. The electric lifting type immersion tank 106 is controlled to move down to the initial position, and then the supporting plate 104 and the parts thereon are turned over by 180 degrees again by the motor, so that the lower die 105 is upward; 5. The external delivery pump injects the high-temperature molten injection liquid into the cavity 11 through the injection pipe 103, and then the injection-molded mobile phone shell 2 is separated from the upper die 102 and the lower die 105 through the demolding assembly after cooling.

[0035] In this embodiment, the external air pump is communicated with the air inlet pipe 31 and the air outlet pipe 32. When the demolding of the mobile phone shell 2 formed and cooled in Embodiment 1 is performed, the lower die 105 is not easy to separate from the mobile phone shell 2 due to the embedded convex edge 21 of the mobile phone shell 2. At this time, the electric push rod II 201 is controlled to drive the push plate 202 to move downward, the push plate 202 pushes the convex edge 21 outward, the convex edge 21 is deformed under the action of its own elastic force, the push plate 202 extrudes the elastic plate 203 downward, the spring of the elastic plate 203 is compressed, and then the convex edge 21 is temporarily separated from the lower die 105. Then, the upper die 102, the rectangular plate I 205 and the convex pipe I 206 drive the mobile phone shell 2 to move upward by controlling the hydraulic cylinder 101, so that the mobile phone shell 2 is separated from the lower die 105 first. Then, the rectangular plate I 205 drives the convex pipe I 206 to shrink inward into the outer channel 12 by controlling the electric push rod III 204, so that the convex pipe I 206 is separated from the mobile phone shell 2. At the same time, the rectangular plate II 2011 drives the convex pipe II 2012 to shrink inward into the outer channel 12 by controlling the electric push rod IV 2010, so that the convex pipe II 2012 is separated from the mobile phone shell 2. Since the release agent has been sprayed on the upper surface of the upper die 102 and the lower surface of the lower die 105 before injection molding, the mobile phone shell 2 is separated from the lower surface of the lower die 105 under the action of its own gravity, and the demolding of the mobile phone shell 2 is completed.

[0036] When the push plate 202 moves downward to push the convex edge 21 outward, there is a large friction between the outer side ring surface of the push plate 202 and the convex edge 21, which makes the convex edge 21 easy to be worn and affects the forming quality. Therefore, the outer side ring surface of the push plate 202 is made smooth, which greatly reduces the friction between the outer side ring surface of the push plate 202 and the convex edge 21 and reduces the wear of the convex edge 21.

[0037] In the process of pushing plate 202 pushing the convex edge 21 to separate the lower mold 105 from the mobile phone shell 2, the convex edge 21 is extruded outward, and after the pushing plate 202 is separated from the convex edge 21, there is a gap between the pushing plate 202 and the lower mold 105, so that the convex edge 21 enters the gap between the pushing plate 202 and the lower mold 105 under the action of its own elastic force, so that the convex edge 21 is stuck, affecting demolding. To solve this problem, when the pushing plate 202 moves downward, the high-temperature resistant telescopic ring 2015 is pulled downward to stretch, so that the stretched telescopic ring 2015 closes the gap between the pushing plate 202 and the lower mold 105, so that the telescopic ring 2015 continuously extrudes the convex edge 21 outward, avoiding the convex edge 21 rebounding under the action of its own elastic force.

[0038] Because when the convex tube I 206 is retracted into the outer channel 12 and separated from the charging hole 22 of the mobile phone shell 2, and when the convex tube II 2012 is retracted into the outer channel 12 and separated from the round hole 23 of the mobile phone shell 2, the outer surfaces of the convex tube I 206 and the convex tube II 2012 will have residual debris, which will then fall into the cavity 11, making it difficult to clean. Therefore, by making the convex tube I 206 and the convex tube II 2012 hollow, during the demolding process of the upper mold 102, the electric push rod III 204 is first controlled to make the rectangular plate I 205 drive the convex tube I 206 to retract into the outer channel 12, and at the same time, the electric push rod IV 2010 is controlled to make the rectangular plate II 2011 drive the convex tube II 2012 to retract into the outer channel 12. At this time, the convex tube I 206 and the upper mold 102 move relative to each other, and the convex tube II 2012 and the upper mold 102 move relative to each other, thereby scraping the debris on the outer surface of the convex tube I 206 and the outer surface of the convex tube II 2012 into the cavity 11. Then, the external air pump is controlled to suck the outer channel 12 through the exhaust pipe 32 and the air inlet pipe 31, so that the outer channel 12 sucks the cavity 11 through the hollow convex tube I 206 and the convex tube II 2012, and the fallen debris is sucked away.

[0039] In view of the fact that during the injection molding process of the mobile phone shell 2, the upper mold 102 and the lower mold 105 need to be cooled to quickly cool and shape the mobile phone shell 2 after injection, the prior art cannot keep the upper mold 102 and the lower mold 105 at the same cooling temperature, so that the temperature of the upper mold 102 and the lower mold 105 is inconsistent, thereby causing the cooling effect of the outside and the inside of the mobile phone shell 2 to be different, affecting the molding effect of the mobile phone shell 2. Based on this, before injection, the electric push rod III 204 is controlled to drive the spring plate I 207 and the parts thereon to move to the side close to the lower mold 105, after the convex tube I 206 contacts the lower mold 105, the electric push rod III 204 is controlled to drive the spring plate I 207 and the parts thereon to continue to move to the side close to the lower mold 105, and then the spring plate I 207 drives the round rod I 208 to move, the spring of the spring plate I 207 is compressed, so that the round rod I 208 pushes open the spring sealing plate I 209 inward, the spring of the spring sealing plate I 209 is compressed, so that the outer channel 12 and the inner channel 13 are communicated through the convex tube I 206.

[0040] At the same time, the electric push rod IV 2010 is controlled to drive the spring plate II 2013 and the parts thereon to move to the side close to the lower mold 105, after the convex tube II 2012 contacts the lower mold 105, the electric push rod IV 2010 is controlled to drive the spring plate II 2013 and the parts thereon to continue to move to the side close to the lower mold 105, and then the spring plate II 2013 drives the round rod II 2016 to move, the spring of the spring plate II 2013 is compressed, so that the round rod II 2016 pushes open the spring sealing plate II 2014 inward, the spring of the spring sealing plate II 2014 is compressed, so that the outer channel 12 and the inner channel 13 are communicated through the convex tube II 2012, and then after the injection is completed, the upper mold 102 and the lower mold 105 need to be cooled, the external air pump is controlled to deliver cooling gas through the air inlet pipe 31, the cooling gas enters the outer channel 12 to cool and cool the upper mold 102, part of the cooling gas enters the inner channel 13 through the convex tube I 206 to cool and cool the lower mold 105, and then flows back to the outer channel 12 from the inner channel 13 through the convex tube II 2012, and finally is discharged from the exhaust pipe 32 to form a cooling cycle, so that the upper mold 102 and the lower mold 105 always maintain the same cooling temperature and speed, thereby improving the molding efficiency of the mobile phone shell 2.

[0041] Although the present disclosure has been shown and described with respect to certain exemplary embodiments thereof, it should be understood by those skilled in the art that various changes in form and detail can be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-described embodiments, but should be determined by the appended claims and equivalents thereof.

Claims

1. A multi-directional positioning stamping die for plastic products, comprising a fixing frame (1), characterized in that, The hydraulic cylinder (101) is further included; the fixed frame (1) is fixedly connected with the hydraulic cylinder (101); the telescopic end of the hydraulic cylinder (101) is fixedly connected with the upper die (102); the upper die (102) is fixedly connected with the injection pipe (103); the fixed frame (1) is rotatably connected with the supporting plate (104), the fixed frame (1) is connected with the motor, and the output shaft of the motor is fixedly connected with the supporting plate (104); the supporting plate (104) is fixedly connected with the lower die (105), and the lower die (105) is below the upper die (102); when the upper die (102) moves downward and contacts the supporting plate (104), a cavity (11) is formed between the upper side of the upper die (102) and the lower side of the lower die (105); the fixed frame (1) is fixedly connected with the electric lifting type soaking hopper (106), and the soaking hopper (106) is below the lower die (105); the lower die (105) is fixedly connected with the spray pipe (107); the upper die (102) is connected with the demolding assembly for demolding the mobile phone shell (2), and the demolding assembly is connected with the lower die (105).

2. The multi-directional positioning punch die for plastic products according to claim 1, characterized in that, The cleaning pipe (108) and the cleaning brush (109) are further included; the lower die (105) is fixedly connected with a plurality of spray pipes (107); the supporting plate (104) is fixedly connected with a plurality of cleaning brushes (109).

3. The multi-directional positioning punch die for plastic products according to claim 1, wherein, The electric push rod I (1010) and the stamp head (1011) are further included; the lower die (105) is fixedly connected with the electric push rod I (1010); the telescopic end of the electric push rod I (1010) is detachably connected with the stamp head (1011), and the stamp head (1011) is internally provided with an electric heating module.

4. The multi-directional positioning punch die for plastic products according to claim 3, wherein, The rubber sheet (1012) and the elastic cloth (1013) are further included; the lower die (105) is fixedly connected with a plurality of elastic cloths (1013); a plurality of rubber sheets (1012) are fixedly connected to the lower side of the lower die (105), and the rubber sheets (1012) cover the surface of the stamp head (1011).

5. The multi-directional positioning punch die for plastic products according to claim 1, wherein The demolding assembly comprises electric push rod II (201), push plate (202), elastic plate (203), electric push rod III (204), rectangular plate I (205), convex pipe I (206), electric push rod IV (2010), rectangular plate II (2011) and convex pipe II (2012); the lower mold (105) is fixedly connected with a plurality of electric push rod II (201); the telescopic ends of all electric push rod II (201) are fixedly connected with the push plate (202) in common, and the push plate (202) is in contact with the lower mold (105); the supporting plate (104) is fixedly connected with the elastic plate (203); the upper mold (102) is provided with an outer channel (12); the upper mold (102) is fixedly connected with the air inlet pipe (31), and the air inlet pipe (31) is in communication with the outer channel (12); the upper mold (102) is fixedly connected with the air outlet pipe (32), and the air outlet pipe (32) is in communication with the outer channel (12); the upper mold (102) is fixedly connected with the electric push rod III (204); the telescopic end of the electric push rod III (204) is connected with the rectangular plate I (205), and the rectangular plate I (205) slides in the outer channel (12); the rectangular plate I (205) is fixedly connected with the convex pipe I (206); the upper mold (102) is fixedly connected with the electric push rod IV (2010); the telescopic end of the electric push rod IV (2010) is connected with the rectangular plate II (2011); the rectangular plate II (2011) is fixedly connected with the convex pipe II (2012).

6. The multi-directional positioning punch die for plastic products according to claim 5, wherein The outer side surface of the push plate (202) is smooth.

7. The multi-directional positioning punch die for plastic products according to claim 5, wherein, The telescopic ring (2015) is further included; the lower mold (105) is fixedly connected with the telescopic ring (2015) which is high temperature resistant, and the telescopic ring (2015) is fixedly connected with the push plate (202).

8. The multi-directional positioning punch die for plastic products according to claim 5, wherein, The convex pipe I (206) and the convex pipe II (2012) are both hollow.

9. The multi-directional positioning punch die for plastic products according to claim 8, wherein, The spring plate I (207), the round rod I (208), the spring sealing plate I (209), the spring plate II (2013), the spring sealing plate II (2014) and the round rod II (2016) are further included; the telescopic end of the electric push rod III (204) is fixedly connected with the spring plate I (207), and the spring of the spring plate I (207) is fixedly connected with the rectangular plate; the lower mold (105) is provided with an inner channel (13); the lower mold (105) is slidingly connected with the spring sealing plate I (209), and the spring sealing plate I (209) is located in the inner channel (13); the spring plate I (207) is fixedly connected with the round rod I (208), and the round rod I (208) passes through the convex pipe I (206); the telescopic end of the electric push rod IV (2010) is fixedly connected with the spring plate II (2013), and the spring of the spring plate II (2013) is fixedly connected with the rectangular plate II (2011); the lower mold (105) is slidingly connected with the spring sealing plate II (2014), and the spring sealing plate II (2014) is located in the inner channel (13); the spring plate II (2013) is fixedly connected with the round rod II (2016), and the round rod II (2016) passes through the convex pipe II (2012).

10. The multi-directional positioning punch die for plastic products according to claim 9, wherein, The forming method comprises the following steps: 1, by driving the support plate (104) and the parts on it to overturn 180 degrees, so that the nozzle (107) is aligned upward to the lower side of the upper die (102), and the lower die (105) is downward at this time; 2, control the electric lifting type soaking pot (106) to move upward until the lower surface of the lower die (105) is completely immersed into the liquid release agent in the soaking pot (106), so that the lower surface of the lower die (105) is evenly covered with the release agent; 3, control the external pump to spray the liquid release agent upward through the nozzle (107), so that the release agent is covered on the lower side of the upper die (102); 4, control the electric lifting type soaking pot (106) to move downward to the initial position, then control the motor to drive the support plate (104) and the parts on it to overturn 180 degrees again, so that the lower die (105) is upward; 5, control the external delivery pump to inject the high-temperature molten injection liquid into the cavity (11) through the injection pipe (103), and then after cooling through the demolding assembly, the injection molded mobile phone shell (2) is separated from the upper die (102) and the lower die (105) through the demolding assembly.

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