A forming device for producing electronic pallets based on plastic recycling

Abstract

The present application relates to the technical field of plastic recycling, and discloses a forming device for electronic tray production based on plastic recycling and reuse, which comprises a fixed mold and a sliding mold, a cavity is respectively formed between the fixed mold and the sliding mold, and a pouring pipe is arranged on the fixed mold, further comprising an isolation unit arranged in the pouring pipe, wherein the isolation unit comprises a closing part and a dredging part arranged in the pouring pipe; the isolation unit can fill the gap between the pouring pipe and the cavity, and can isolate the inside of the pouring pipe from the inside of the cavity, so that the residual raw materials in the pouring pipe are not cooled synchronously with the molten material in the cavity during the cooling process, and the internal plug is prevented from being formed; after the pouring pipe is closed, the liquid pump can absorb the residual raw materials in the pouring pipe in the first time, so that waste and secondary use are prevented.

Description

Technical Field

[0001] This invention relates to the technical field of plastic recycling, and more particularly to a molding equipment for the production of electronic trays based on plastic recycling. Background Technology

[0002] Using recycled waste plastics as raw materials, after pretreatment such as recycling, sorting, crushing, washing, granulation and modification, electronic trays that meet the requirements of the electronics industry are manufactured through injection molding. This is a typical technical direction that combines resource recycling with lightweight electronic packaging. It not only solves the environmental pollution problem of waste plastics, but also reduces the raw material cost of electronic tray production, which is in line with the industry trend of carbon neutrality and green development of the electronics manufacturing industry. Injection molding is the core link in transforming modified recycled plastic particles into electronic trays. By injecting molten modified recycled plastic into a precision mold, and after cooling and molding, the electronic tray that meets the size and performance requirements is obtained after demolding. The whole process is a continuous and automated production.

[0003] The existing injection molding machines have the following problems in the production and molding of electronic trays: After the injection molding machine completes the pouring process, the molten material remaining inside the pouring tube will have multiple negative effects if it is not treated before cooling. The material will solidify inside the tube, forming solid plugs that block the pouring tube channel. Higher pressure is required to push the plugs during subsequent injections, which not only increases the load on the injection molding machine's hydraulic system and increases energy consumption, but also causes a sharp increase in melt flow resistance, resulting in uneven mold filling. In addition, there are unavoidable gaps between the cavity and the pouring tube during actual assembly and use. When the molten material inside the cavity is cooled, the molten material in the pouring tube and the gaps will be cooled simultaneously. The molten material in these gaps will directly affect the overall appearance quality of the product, requiring subsequent grinding operations. Summary of the Invention

[0004] In view of the problems in the existing technology where some molten material remains in the injection pipe during the injection process and the gap between the injection nozzle and the cavity causes changes in the overall shape of the product, a molding equipment for the production of electronic trays based on plastic recycling is proposed.

[0005] This application provides a molding equipment for the production of electronic trays based on plastic recycling. The purpose is to: fill the gap between the pouring pipe and the cavity by setting an isolation unit, and isolate the inside of the pouring pipe from the inside of the cavity. This prevents the residual raw material inside the pouring pipe from cooling synchronously during the cooling process of the molten material inside the cavity, which would cause material plugs to form inside. After the pouring pipe is sealed, the liquid pump can absorb the residual raw material inside the pouring pipe as soon as possible, preventing waste and reuse.

[0006] The technical solution of the present invention is as follows: a molding equipment for producing electronic trays based on plastic recycling, comprising a fixed mold and a sliding mold, cavities respectively opened between the fixed mold and the sliding mold, a pouring pipe disposed in the fixed mold, and an isolation unit disposed inside the pouring pipe, wherein the isolation unit comprises a sealing component and a unblocking component disposed inside the pouring pipe. The sealing component includes a first mating ring disposed on the inner wall of the pouring pipe near the sliding mold, a second mating ring disposed on the inner wall of the pouring pipe away from the sliding mold, an mounting ring disposed on the inner wall of the pouring pipe, a drive pipe disposed inside the mounting ring, a bidirectional telescopic rod disposed inside the drive pipe, a first sealing plate disposed on the telescopic end of the bidirectional telescopic rod near the first mating ring, and a second sealing plate disposed on the telescopic end of the other side. In the initial state, there is a gap between the first sealing plate and the first mating ring, and there is also a gap between the second sealing plate and the second mating ring to allow the molten material to flow normally into the cavity. The end face shape and size of the first sealing plate are exactly the same as the end face shape and size of the inner wall of the first mating ring, and the end face shape and size of the second sealing plate are also exactly the same as the end face shape and size of the inner wall of the second mating ring. The drive tube is in a sealed state, and the telescopic ends of the bidirectional telescopic rods are sealed and slide through the corresponding side walls. A drain assembly is installed on the first mating ring.

[0007] Furthermore, the drainage assembly includes a sliding groove formed on the inner wall of the mating ring, a drainage groove formed on the bottom wall of the sliding groove, a sealing plate set on the inner wall of the drainage groove, a flow hole formed on the upper end of the sealing plate, and a one-way element installed at the lower end of the sealing plate.

[0008] Furthermore, the one-way element includes a support plate disposed at the lower end of the sealing plate, a pressure spring disposed at the upper end of the support plate, and a one-way plate disposed at the upper end of the pressure spring. The one-way plate is located directly below the flow hole. In the initial state, the pressure spring is in a compressed state and exerts upward pressure on the one-way plate, so that the one-way plate is tightly pressed against the lower part of the flow hole to seal it.

[0009] Furthermore, the unblocking component includes an unblocking block disposed inside the irrigation pipe, an unblocking groove formed at the upper end of the unblocking block, the lower end of the unblocking groove being connected to a liquid pump, and an opening and closing assembly installed between the unblocking groove and the sealing plate.

[0010] Furthermore, the opening and closing assembly includes a sliding block disposed at the lower end of the closing plate and an opening and closing plate disposed at the lower end of the sliding block. The opening and closing plate is located inside the unblocking groove. In the initial state, the opening and closing plate is used to close the unblocking groove.

[0011] Furthermore, the lower end of the drainage trough is connected to the interior of the irrigation pipe.

[0012] Furthermore, the telescopic end, drive tube, mounting ring, sealing plate one, and sealing plate two of the bidirectional telescopic rod are all made of high-temperature resistant alloy.

[0013] The beneficial effects of this invention are: By setting up a sealing component, after the molten material is completely injected into the cavity, the two sides of the pouring pipe can be sealed by the bidirectional telescopic rod. During the sealing process, the temperature change inside the cavity can be isolated, effectively preventing the temperature of the molten material inside the cavity from cooling down and causing the molten material inside the pouring pipe to cool down simultaneously, forming a plug, which would affect the subsequent pouring quality and efficiency. After cooling is completed, the sealing plate one and the sealing plate two are reset, and pouring can be completed normally afterwards.

[0014] By setting up a drainage component, when the sealing plate moves horizontally to the inner wall of the mating ring, the sealing plate fills the gap between the pouring pipe and the cavity during the movement. Since the cavity is closed at this time, in order to ensure that the sealing plate can overcome the pressure of the molten material inside the cavity and move normally, the drainage component can overcome the resistance encountered by the sealing plate during the movement. The molten material at the assembly gap between the cavity and the pouring pipe is squeezed and discharged into the pouring pipe through the drainage component, thereby eliminating the gap between the cavity and the pouring pipe and effectively improving the product molding quality and production efficiency.

[0015] By setting up a dredging component, when the sealing component seals the space inside the pouring pipe, the dredging channel changes from a closed state to an open state. To prevent the waste of residual molten material inside, the dredging channel can recycle the residual molten material inside the pouring pipe after it is opened. The recycled molten material can be reused, effectively reducing material waste in the production process and reducing production costs. At the same time, it can ensure that there are no large amounts of residue in the pouring pipe that will affect subsequent molding and pouring. Attached Figure Description

[0016] Figure 1 This is a first-view three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the fixed mold structure of the present invention; Figure 3 This is a schematic diagram of the pouring cylinder structure of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of partial cross-section structure; Figure 5 For the present invention Figure 3 Top view of the planar structure; Figure 6 For the present invention Figure 3 Side view plan view of the structure; Figure 7 This is a schematic diagram of the drive tube mounting structure of the present invention; Figure 8 This is a schematic diagram of the unidirectional element structure of the present invention.

[0017] In the picture: 1. Fixed mold; 2. Sliding mold; 3. Pouring pipe; 101. Mating ring one; 102. Mating ring two; 103. Mounting ring; 104. Drive pipe; 105. Bidirectional telescopic rod; 106. Sealing plate one; 107. Sealing plate two; 201. Sliding groove; 202. Drainage groove; 203. Sealing plate; 204. Flow hole; 205. Bearing plate; 206. Pressure spring; 207. One-way plate; 301. Unblocking block; 302. Unblocking groove; 303. Sliding block; 304. Opening and closing plate. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] Example 1, referring to Figures 1-6 The first embodiment of the present invention provides a molding device for producing electronic trays based on plastic recycling, including a fixed mold 1 and a sliding mold 2, a cavity respectively opened between the fixed mold 1 and the sliding mold 2, a pouring pipe 3 fixedly installed in the fixed mold 1, and an isolation unit installed inside the pouring pipe 3. The isolation unit includes a sealing component and a unblocking component installed inside the pouring pipe 3.

[0020] The sealing components include a first mating ring 101 fixedly installed on the inner wall of the pouring pipe 3 near the sliding mold 2, a second mating ring 102 fixedly installed on the inner wall of the pouring pipe 3 away from the sliding mold 2, a mounting ring 103 fixedly installed on the inner wall of the pouring pipe 3, a drive pipe 104 fixedly installed inside the mounting ring 103, a bidirectional telescopic rod 105 fixedly installed inside the drive pipe 104, a first sealing plate 106 fixedly installed on the telescopic end of the bidirectional telescopic rod 105 near the first mating ring 101, and a second sealing plate 107 fixedly installed on the other telescopic end.

[0021] In the initial state, there is a gap between the sealing plate 106 and the mating ring 101, and there is also a gap between the sealing plate 107 and the mating ring 102 to allow the molten material to flow normally into the cavity. The end face shape and size of the sealing plate 106 are exactly the same as the end face shape and size of the inner wall of the mating ring 101, and the end face shape and size of the sealing plate 107 are also exactly the same as the end face shape and size of the inner wall of the mating ring 102. The drive tube 104 is in a sealed state, and the telescopic ends of the bidirectional telescopic rod 105 are sealed and slide through the corresponding side walls. A drain assembly is installed on the mating ring 101.

[0022] Specifically, after the molten material is injected into the mold cavity through the gating pipe 3 until the cavity is full, to prevent the molten material inside the gating pipe 3 from cooling and forming plugs due to temperature fluctuations during the cooling process, the presence of plugs will affect the smoothness of subsequent pouring processes. If too many plugs accumulate and cause blockages, the machine needs to be stopped for cleaning, which not only wastes molten material but also affects the efficiency of product molding. Therefore, a sealing component is designed. The main purpose of the sealing component is to seal both sides of the gating pipe 3 immediately after it has been injected into the mold cavity. This prevents temperature changes inside the mold cavity from affecting the molten material inside the gating pipe 3 and also prevents the backflow of residual molten material inside the gating pipe 3 from affecting the quality of subsequent molten materials.

[0023] The mating ring 101 and the sealing plate 106 cooperate with each other, and the mating ring 102 and the sealing plate 107 cooperate with each other. In the initial state (when the telescopic end of the bidirectional telescopic rod 105 is in the retracted state), there is a gap between the mating ring 101 and the sealing plate 106. At this time, the molten material can be injected into the cavity through the gap between the two. When the cavity is filled with molten material, the bidirectional telescopic rod 105 drives the sealing plate 106 and the sealing plate 107 to move horizontally through the telescopic end. During the movement, the two sides of the pouring pipe 3 can be sealed. The advantage of this sealing is that, compared with the traditional pouring method, this method can isolate the pouring pipe 3 from the temperature inside the cavity, and ensure that when the sealing plate 106 is completely closed, there is no gap between the cavity and the pouring pipe 3 during the assembly process, ensuring that the cavity is a complete product shape.

[0024] The sealing component is the first step. Its purpose is to ensure that the pouring pipe 3 and the mold cavity are mutually sealed and do not interfere with each other. While the sealing plate 106 is sealing both, the lower end of the pouring pipe 3 is opened to facilitate the subsequent collection and reuse of any molten material remaining inside the pouring pipe 3, thereby improving production efficiency and reducing production costs. The sealing plate 107 seals the pouring pipe 3 and the channels of molten material connected to its side, ensuring that the molten material within the channels will not be affected during subsequent molten material recovery.

[0025] During use, the molten material, under pressure, flows through the pouring pipe 3 as a medium into the cavity and fills the space inside the cavity. After filling, the bidirectional telescopic rod 105 opens, and the telescopic ends of the bidirectional telescopic rod 105 move horizontally. During the movement, the sealing plate 106 and the sealing plate 107 are respectively driven into the inner walls of the mating ring 101 and the mating ring 102, and move horizontally along the inner walls. At the same time, since the end face shape of the sealing plate 106 is equal to the inner wall of the mating ring 101, when the sealing plate 106 enters the mating ring 101, the sealing plate 106 seals the inside of the mating ring 101, and the sealing plate 107 seals the mating ring 102, thereby completing the sealing of the channels on both sides of the pouring pipe 3. (If it is necessary to fill the gap between the pouring pipe 3 and the cavity, the sealing plate 106 needs to continue to slide horizontally until the side wall of the sealing plate 106 and the outer wall plane of the pouring pipe 3 are on the same plane to ensure that there is no gap between them.)

[0026] Example 2, refer to Figures 5-8 This is the second embodiment of the present invention, which differs from the first embodiment in that: the drainage assembly includes a sliding groove 201 formed on the inner wall of the mating ring 101, a drainage groove 202 formed on the bottom wall of the sliding groove 201, a sealing plate 203 fixedly installed on the inner wall of the drainage groove 202, a flow hole 204 formed on the upper end of the sealing plate 203, and a one-way element installed on the lower end of the sealing plate 203. The one-way element includes a support plate 205 fixedly installed on the lower end of the sealing plate 203, a pressure spring 206 fixedly installed on the upper end of the support plate 205, and a one-way plate 207 fixedly installed on the upper end of the pressure spring 206, with the one-way plate 207 located directly below the flow hole 204. In the initial state, the pressure spring 206 is in a compressed state and exerts upward pressure on the one-way plate 207, causing the one-way plate 207 to tightly seal the flow hole 204 below it.

[0027] Specifically, the drainage component is used to balance the pressure inside the cavity. Because the cavity is in a closed state, when the sealing plate 106 moves inside the mating ring 101, it will generate pressure inside the cavity. This pressure will act on the sealing plate 106, preventing it from moving normally in the horizontal direction. Therefore, a drainage component is needed. Under normal pressure, the drainage component is in the closed state to ensure normal pouring. When the sealing plate 106 moves in the horizontal direction, it squeezes the molten material in the gap into the drainage tank 202 through pressure, and discharges the molten material in the closed area through the one-way element. This ensures that the sealing plate 106 can fill the gap while ensuring that the molten material in the gap is discharged smoothly.

[0028] The function of the one-way element is to seal the drain trough 202. During normal pouring, the sealing plate 203 in the one-way element can seal the drain trough 202 to ensure normal pouring. When the pressure inside the cavity increases, the pressure of the molten material will exert downward pressure on the sealing plate 203. Under pressure, the sealing plate 203 moves downward, creating a gap between the sealing plate 203 and the flow hole 204. This allows excess molten material to flow into the drain trough 202 through the gap and flow back into the pouring pipe 3, facilitating subsequent recycling. When the pressure inside the cavity returns to normal, the sealing plate 203 resets and reseals the flow hole 204.

[0029] During use, as the sealing plate 106 moves along the inner wall of the mating ring 101, it compresses the molten material between the cavity and the sealing plate 106. After being compressed, the molten material exerts downward pressure on the sealing plate 203 at the lower end of the flow hole 204. The sealing plate 203 moves downward under pressure, creating a gap between the sealing plate 203 and the flow hole 204 during the movement. At this time, excess molten material flows through the gap into the drain tank 202, thereby balancing the pressure inside the cavity and ensuring that the sealing plate 106 can move to the designated position to fill the assembly gap between the cavity and the pouring pipe 3.

[0030] The remaining structure is the same as that in Example 1.

[0031] Example 3, referring to Figures 5-6 This is the third embodiment of the present invention, which differs from the second embodiment in that: the unblocking component includes an unblocking block 301 fixedly installed inside the irrigation pipe 3, an unblocking groove 302 formed at the upper end of the unblocking block 301, the lower end of the unblocking groove 302 being connected to a pump, and an opening and closing assembly installed between the unblocking groove 302 and the sealing plate 106. The opening and closing assembly includes a sliding block 303 fixedly installed at the lower end of the sealing plate 106, and an opening and closing plate 304 fixedly installed at the lower end of the sliding block 303. The opening and closing plate 304 is located inside the unblocking groove 302, and in the initial state, the opening and closing plate 304 is used to close the unblocking groove 302. The lower end of the drainage trough 202 is in communication with the interior of the irrigation pipe 3. The telescopic end of the bidirectional telescopic rod 105, the drive pipe 104, the mounting ring 103, the sealing plate 106, and the sealing plate 107 are all made of high-temperature resistant alloy.

[0032] Specifically, the unblocking component is used to recover the molten material remaining inside the pouring pipe 3. When the sealing plate 106 seals one side of the pouring pipe 3 during its movement, the inside of the pouring pipe 3 is in a sealed space. At this time, the unblocking groove 302 opens, allowing it to recover the molten material remaining in the sealed space, ensuring the utilization rate of the molten material during production and reducing production costs. The recovery of internal residual molten material through the pressure difference generated by the pump is existing technology and will not be elaborated further.

[0033] During use, when the sealing plate 106 moves horizontally, the sliding block 303 at its lower end moves synchronously. During the movement of the sliding block 303, the opening and closing plate 304 on the side wall moves synchronously. When the sealing plate 106 just moves to the inner wall of the mating ring 101, the opening and closing plate 304 also opens the unblocking groove 302 synchronously. After the opening and closing plate 304 is opened, the inside of the pouring pipe 3 is only connected to the inside of the unblocking groove 302. At this time, the pump can discharge the residual molten material inside.

[0034] The remaining structure is the same as that in Example 2.

[0035] Based on embodiments 1-3, the working principle of the present invention is as follows: Under pressure, the molten material flows through the pouring pipe 3 as a medium into the cavity and fills the space inside the cavity. After filling, the bidirectional telescopic rod 105 opens, and the telescopic ends of the bidirectional telescopic rod 105 move horizontally. During the movement, the sealing plate 106 and the sealing plate 107 are respectively driven into the inner wall of the mating ring 101 and the mating ring 102, and move horizontally along the inner wall. At the same time, since the end face shape of the sealing plate 106 is equal to the inner wall of the mating ring 101, when the sealing plate 106 enters the mating ring 101, the sealing plate 106 seals the inside of the mating ring 101, and the sealing plate 107 seals the mating ring 102, thereby completing the sealing of the channels on both sides of the pouring pipe 3.

[0036] As the sealing plate 106 moves along the inner wall of the mating ring 101, it compresses the molten material between the cavity and the sealing plate 106. After being compressed, the molten material exerts downward pressure on the sealing plate 203 at the lower end of the flow hole 204. Under pressure, the sealing plate 203 moves downward, creating a gap between the sealing plate 203 and the flow hole 204. At this time, excess molten material flows through the gap into the drain tank 202, thereby balancing the pressure inside the cavity and ensuring that the sealing plate 106 can move to the designated position to fill the assembly gap between the cavity and the gating pipe 3. When the closing plate 106 moves horizontally, the sliding block 303 at its lower end moves synchronously. During the movement of the sliding block 303, the opening and closing plate 304 on the side wall moves synchronously. When the closing plate 106 just moves to the inner wall of the mating ring 101, the opening and closing plate 304 also opens the unblocking groove 302 synchronously. After the opening and closing plate 304 is opened, the inside of the pouring pipe 3 is only connected to the inside of the unblocking groove 302. At this time, the pump can discharge the residual molten material inside.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A molding device for producing electronic trays based on plastic recycling, comprising a fixed mold (1) and a sliding mold (2), cavities respectively formed between the fixed mold (1) and the sliding mold (2), and a pouring pipe (3) disposed in the fixed mold (1), characterized in that, It also includes an isolation unit disposed inside the irrigation pipe (3), the isolation unit including a sealing component and a dredging component disposed inside the irrigation pipe (3); The sealing component includes a first mating ring (101) disposed on the inner wall of the pouring pipe (3) near the sliding mold (2), a second mating ring (102) disposed on the inner wall of the pouring pipe (3) away from the sliding mold (2), an mounting ring (103) disposed on the inner wall of the pouring pipe (3), a drive pipe (104) disposed inside the mounting ring (103), a bidirectional telescopic rod (105) disposed inside the drive pipe (104), a first sealing plate (106) disposed on the telescopic end of the bidirectional telescopic rod (105) near the first mating ring (101), and a second sealing plate (107) disposed on the other telescopic end. In the initial state, there is a gap between the first sealing plate (106) and the first mating ring (101), and there is also a gap between the second sealing plate (107) and the second mating ring (102) for the molten material to flow normally into the cavity. The end face shape and size of the first sealing plate (106) are exactly the same as the end face shape and size of the inner wall of the first mating ring (101), and the end face shape and size of the second sealing plate (107) are also exactly the same as the end face shape and size of the inner wall of the second mating ring (102). The drive tube (104) is in a sealed state, and the telescopic ends of the bidirectional telescopic rod (105) are sealed and slide through the corresponding side walls. A drain assembly is installed on the first mating ring (101).

2. The molding equipment for producing electronic trays based on plastic recycling as described in claim 1, characterized in that, The drainage assembly includes a sliding groove (201) on the inner wall of the mating ring (101), a drainage groove (202) on the bottom wall of the sliding groove (201), a sealing plate (203) on the inner wall of the drainage groove (202), a flow hole (204) on the upper end of the sealing plate (203), and a one-way element installed at the lower end of the sealing plate (203).

3. The molding equipment for producing electronic trays based on plastic recycling as described in claim 2, characterized in that, The one-way element includes a support plate (205) disposed at the lower end of the sealing plate (203), a pressure spring (206) disposed at the upper end of the support plate (205), and a one-way plate (207) disposed at the upper end of the pressure spring (206). The one-way plate (207) is located directly below the flow hole (204). In the initial state, the pressure spring (206) is in a compressed state and exerts upward pressure on the one-way plate (207), so that the one-way plate (207) is tightly pressed against the lower part of the flow hole (204) to seal it.

4. The molding equipment for producing electronic trays based on plastic recycling as described in claim 3, characterized in that, The unblocking component includes an unblocking block (301) disposed inside the irrigation pipe (3), an unblocking groove (302) opened at the upper end of the unblocking block (301), the lower end of the unblocking groove (302) being connected to the liquid pump, and an opening and closing component being installed between the unblocking groove (302) and the sealing plate (106).

5. The molding equipment for producing electronic trays based on plastic recycling as described in claim 4, characterized in that, The opening and closing assembly includes a sliding block (303) disposed at the lower end of the closing plate (106) and an opening and closing plate (304) disposed at the lower end of the sliding block (303). The opening and closing plate (304) is located inside the unblocking groove (302). In the initial state, the opening and closing plate (304) is used to close the unblocking groove (302).

6. The molding equipment for producing electronic trays based on plastic recycling according to claim 5, characterized in that, The lower end of the drainage trough (202) is connected to the interior of the irrigation pipe (3).

7. The molding equipment for producing electronic trays based on plastic recycling as described in claim 6, characterized in that, The telescopic end, drive tube (104), mounting ring (103), sealing plate one (106) and sealing plate two (107) of the bidirectional telescopic rod (105) are all made of high-temperature resistant alloy.

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