PP sheet forming mold

Abstract

This application relates to a PP sheet molding die, including a molding module. The molding module has a main flow channel and at least two auxiliary flow channels. One end of the molding module has a main material inlet and an auxiliary material inlet, and the other end has a discharge outlet. The amount of auxiliary material dissolved in the auxiliary flow channels is higher than that of the main material dissolved in the main flow channel. The main flow channel and at least two auxiliary flow channels in this application ensure that when the auxiliary material coats the main material and is discharged from the discharge outlet, the end face of the main material is less likely to tear when it cools and solidifies to form a sheet, thereby accelerating the travel speed and increasing the production speed of PP sheets. The adjustable components eliminate the need to replace the molding module, enabling the production of PP sheets of different thicknesses with a single molding module. The guide surface reduces the pressure caused by thermal expansion and contraction blocks driving the module's deformation, further facilitating the operator's adjustment of the discharge outlet diameter.

Description

Technical Field

[0001] This application relates to the field of molds, and more particularly to a PP sheet molding mold. Background Technology

[0002] PP sheets are one of the main types of general-purpose thermoplastics, possessing excellent overall performance. PP sheets are characterized by high transparency, good barrier properties, low density, and non-toxicity. Furthermore, PP sheets do not produce toxic or harmful gases when heated or burned, posing no threat to human health or corrosion to equipment.

[0003] When PP sheets are used as lithium battery separators, workers need to inject PP material into the mold cavity through the injection port and discharge it through the outlet. The PP material discharged from the outlet cools and solidifies to form PP sheets.

[0004] The low solubility of PP rubber compounds results in a higher shrinkage rate during cooling and solidification. When the PP rubber compound is discharged from the outlet, the end faces of the PP sheets are easily torn and pulled apart, making it difficult for the PP sheets produced by the mold to travel at a high speed, thereby reducing the PP sheet production rate. Summary of the Invention

[0005] To address the issue of low production rate of PP sheets, this application provides a PP sheet molding die.

[0006] This application provides a PP sheet molding die, which adopts the following technical solution:

[0007] A PP sheet molding die includes a molding module, which has a main flow channel and at least two auxiliary flow channels located on both sides of the main flow channel. One end of the molding module has a main material inlet and an auxiliary material inlet, and the other end has a discharge outlet. One end of the main flow channel is connected to the main material inlet, and the other end is connected to the discharge outlet. One end of each of the at least two auxiliary flow channels is connected to the auxiliary material inlet, and the other end is connected to the discharge outlet. The melt concentration of the auxiliary material in the auxiliary flow channels is higher than that of the main material in the main flow channel. When the main material and auxiliary material are injected into the main material inlet and the auxiliary material inlet respectively, the main material enters the discharge outlet from the main flow channel and is discharged, while the auxiliary material enters the discharge outlet from the auxiliary flow channel and adheres to the end face of the main material before being discharged.

[0008] By adopting the above technical solution, when producing PP sheets, workers inject the main adhesive and auxiliary adhesive into the main material inlet and auxiliary material inlet respectively. The main adhesive enters the outlet along the main flow channel and is discharged, while the auxiliary adhesive enters the outlet along the auxiliary flow channel. At least two auxiliary flow channels are located on both sides of the main flow channel, causing the auxiliary adhesive in the outlet to adhere to both sides of the main adhesive, achieving coating of the main adhesive with the auxiliary adhesive. Furthermore, the solvent content of the auxiliary adhesive is higher than that of the main adhesive, resulting in a lower shrinkage rate when the auxiliary adhesive cools and solidifies to form a sheet. When the auxiliary adhesive coats the main adhesive and is discharged from the outlet, the end face of the main adhesive is less likely to tear or separate when it cools and solidifies to form a sheet. This increases the travel speed and improves the production speed of PP sheets.

[0009] Optionally, the molding module includes module one, module two, module three, and module four, and modules three, one, two, and four are detachably connected at their ends in sequence; the main flow channel is located between module one and module two, and at least two auxiliary flow channels are located one-to-one between module three and module one, and between module two and module four.

[0010] By adopting the above technical solution, when workers need to clean or repair the main flow channel and auxiliary flow channel, they can disassemble and separate Module 3, Module 1, Module 2 and Module 3, so that workers can directly clean or repair the inner wall of the main flow channel and auxiliary flow channel, thereby ensuring the stability of PP sheet production by the molding module and extending the service life of the molding module.

[0011] Optionally, the inner diameter of the discharge port is larger than the inner diameter of the main channel.

[0012] By adopting the above technical solution, when the main rubber material in the main flow channel enters the outlet and the auxiliary rubber material enters the outlet from the auxiliary flow channel, the inner diameter of the outlet is larger than the inner diameter of the main flow channel. This makes it difficult for the main rubber material to completely cover the outlet, providing space for the auxiliary rubber material to enter the outlet. This allows the auxiliary rubber material to completely cover the main rubber material, making it less likely for the end face of the sheet to tear when the main rubber material is discharged from the outlet and cooled to form a sheet. This improves the production quality of PP sheets.

[0013] Optionally, the two ends of the auxiliary channel in the width direction correspond one-to-one with the two ends of the main channel in the width direction.

[0014] By adopting the above technical solution, the auxiliary material coats the main material and is discharged from the outlet. The two ends of the auxiliary flow channel protrude one-to-one from the two ends of the main flow channel in the width direction, so that the main material discharged from the outlet is coated with auxiliary material on both sides, further improving the completeness of the auxiliary material's coating on the main material. At the same time, the solvent content of the auxiliary material is greater than that of the main material, so that the flow rate of the auxiliary material is greater than that of the main material. The auxiliary material is located on both sides of the main material and drives the main material to be discharged from the outlet, further accelerating the discharge speed of the main material from the outlet, thereby increasing the production speed of PP sheets.

[0015] Optionally, the fourth module is connected to an adjustment component, which is used to control the size of the discharge port diameter.

[0016] By adopting the above technical solution, when workers need to produce PP sheets of different thicknesses, they can control the size of the discharge port by adjusting the components, without having to replace the new molding module, thus enabling one molding module to produce PP sheets of different thicknesses.

[0017] Optionally, the adjustment component includes a thermal expansion and contraction block and a heating tube. One end of the thermal expansion and contraction block abuts against the end of module four near the discharge port, and the other end of the thermal expansion and contraction block is connected to the heating end of the heating tube. When the heating end of the heating tube heats the thermal expansion and contraction block, the thermal expansion and contraction block heats up and expands, squeezing module four and deforming it towards module three, thereby adjusting the size of the discharge port.

[0018] By adopting the above technical solution, when the discharge port diameter needs to be reduced, the heating end of the heating tube heats the thermal expansion and contraction block, and the thermal expansion and contraction block expands and drives module four to deform in the direction closer to module three, so that the gap between module four and module three becomes smaller, thereby achieving the reduction of the discharge port diameter.

[0019] Optionally, the end face of module four that abuts against the thermal expansion and contraction block is provided with a guide surface, and the inclination height of the guide surface increases as the distance to module two decreases.

[0020] By adopting the above technical solution, the tilt height of the guide surface increases as the distance to module two decreases, thereby reducing the gap between the end of the thermal expansion and contraction block and the discharge port, thus reducing the pressure of the thermal expansion and contraction block driving the deformation of module four, and further facilitating the staff to change the size of the discharge port.

[0021] Optionally, multiple adjustment components are provided, and the arrangement direction of the adjustment components is parallel to the width direction of the discharge port.

[0022] By adopting the above technical solution, multiple adjustment components are evenly spaced along the width direction of the discharge port, so that multiple thermal expansion and contraction blocks are evenly stressed on module four, thereby ensuring the consistency of the discharge port diameter.

[0023] Optionally, a prompting cavity is provided on the end face of module three away from module one. The prompting cavity extends through module three towards module one. A prompting rod is connected to module three. The prompting rod is slidably connected to the inner wall of the prompting cavity. The sliding direction of the prompting rod is towards or away from module one, and the end of the prompting rod protrudes from the end face of module three and faces module one. When module three is connected to module one, the end face of module one abuts against the end of the prompting rod and drives the prompting rod to slide away from module three. The end of the prompting rod is flush with the end face of module three.

[0024] By adopting the above technical solution, when the staff assembles the molding module, module three is connected to module one, the end face of module one is pressed against the end of the indicator rod, and the indicator rod is driven to slide away from module one until the end of the indicator rod is flush with the end face of module three, so that the staff can directly observe the tightness between module one and module three.

[0025] Optionally, an elastic element is connected between the indicator rod and module three. The elastic element has the elastic force to drive the indicator rod to slide closer to module three, and the end of the indicator rod tends to protrude from the end face of module three.

[0026] By adopting the above technical solution, when the staff disassembles the molding module, module three separates from module one, the clamping force between the end face of module three and the indicator rod disappears, the elastic force of the elastic element drives the indicator rod to slide towards module one, and the end of the indicator rod protrudes from the end face of module three, realizing the automatic reset of the indicator rod.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The setting of a main flow channel and at least two auxiliary flow channels ensures that when the auxiliary material covers the main material and is discharged from the outlet, the end face of the main material is not easily torn when it cools and solidifies to form a sheet, thereby speeding up the travel speed and increasing the production speed of PP sheets.

[0029] 2. By adjusting the component settings, a single molding module can be used to produce PP sheets of different thicknesses without replacing the original molding module;

[0030] 3. The guide surface design reduces the pressure on the module caused by thermal expansion and contraction blocks, further facilitating the adjustment of the outlet diameter by staff. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0032] Figure 2 This is a cross-sectional view of the molding module in an embodiment of this application.

[0033] Figure 3This is a partial structural schematic diagram of the molding module in an embodiment of this application.

[0034] Figure 4 This is a cross-sectional view of the material injection module in an embodiment of this application, mainly showing the main material inlet and the auxiliary material inlet.

[0035] Figure 5 This is a cross-sectional view of the injection module in an embodiment of this application, mainly showing the through flow channel.

[0036] Explanation of reference numerals in the attached diagram: 1. Molding module; 11. Injection module; 111. Main material inlet; 112. Auxiliary material inlet; 113. Through-flow channel; 12. Connecting module; 121. Connecting hole one; 122. Connecting hole two; 123. Connecting hole three; 13. Module one; 131. Main flow channel; 132. Auxiliary flow channel; 133. Injection flow channel one; 134. Injection flow channel three; 14. Module two; 141. Injection flow channel two; 15. Module three; 151. Outlet; 152. Indication cavity; 16. Module four; 161. Guide surface; 2. Base; 3. Indication rod; 4. Elastic component; 5. Adjustment component; 51. Thermal expansion and contraction block; 52. Heating tube; 6. Protective cover. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0038] This application discloses a PP sheet molding die. (Refer to...) Figure 1 The PP sheet forming mold includes a forming module 1 and a base 2. The forming module 1 is fixed on the end face of the base 2 and is used to produce PP sheets.

[0039] Reference Figure 1 The molding module 1 includes an injection module 11, a connecting module 12, a module 13, a module 2 14, a module 3 15, and a module 4 16. Modules 13, 24, 35, and 46 are all strip plates, and their ends are connected by bolts.

[0040] Reference Figure 1 A prompting cavity 152 is provided on the end face of module 3 15 away from module 1 13. The prompting cavity 152 penetrates module 3 15 in the direction of approaching module 1 13. A prompting rod 3 is connected to module 3 15. The prompting rod 3 is slidably connected to the inner wall of the prompting cavity 152. The prompting rod 3 approaches module 1 13 along the inner wall of the prompting cavity 152 and abuts against the end face of module 1 13.

[0041] Reference Figure 1An elastic element 4 is connected between the indicator rod 3 and module 3 15. The elastic element 4 is a compression spring with a certain deformation capacity. The indicator cavity 152 is a cylindrical cavity with an elastic cavity coaxially formed. The elastic element 4 is coaxially sleeved on the outer wall of the indicator rod 3 and located inside the elastic cavity. The two ends of the elastic element 4 in the elastic direction are welded and fixed to the inner wall of the elastic cavity and the outer wall of the indicator rod 3 respectively. The elastic element 4 has the elastic force to drive the end of the indicator rod 3 to slide towards module 13, and the end of the indicator rod 3 tends to protrude from the end face of module 3 15.

[0042] Reference Figure 1 When the end of module 13 and the end face of module 315 are bolted together, the end face of module 13 presses against the end of the indicator rod 3 and drives the indicator rod 3 to slide away from module 315. The other end of the indicator rod 3 is flush with the end face of module 315, so that the staff can directly observe the clamping force between module 315 and module 13.

[0043] Reference Figure 1 The end faces of modules 15 and 16, which are far apart from each other, are fixed to the end face of the base 2 by bolts, thereby fixing the molding module 1 on the base 2. The connecting module 12 is connected to the end faces of modules 13 and 14 by bolts, and the injection module 11 is connected to the end face of the connecting module 12 that is far away from module 13 by bolts.

[0044] Reference Figure 2 A main flow channel 131 is provided between the abutting end faces of module 13 and module 24, and the width direction of the main flow channel 131 is parallel to the length direction of module 13. Auxiliary flow channels 132 are provided between the abutting end faces of module 35 and module 13, and between the abutting end faces of module 24 and module 46, respectively. The width direction of the auxiliary flow channel 132 is parallel to the width direction of the main flow channel 131, and the two ends of the auxiliary flow channel 132 protrude from the two ends of the main flow channel 131 in the width direction.

[0045] Reference Figure 2 A discharge port 151 is provided between the abutting end faces of module 3 15 and module 4 16. The width direction of the discharge port 151 is parallel to the width direction of the main channel 131, and the inner diameter of the discharge port 151 is larger than the inner diameter of the main channel 131. The end of the main channel 131 near module 3 15 is connected to the discharge port 151, and the end of the auxiliary channel 132 near the main channel 131 is also connected to the discharge port 151.

[0046] Reference Figure 2 and Figure 3Module 13 has an injection runner 133 on its end face facing the connecting module 12. Injection runner 133 passes through module 13 towards module 3 15 and connects to the auxiliary runner 132 between module 3 15 and module 13. Module 2 14 has an injection runner 141 on its end face facing the connecting module 12. Injection runner 141 passes through module 2 14 towards module 4 16 and connects to the auxiliary runner 132 between module 2 14 and module 4 16. Injection runner 134 is located on the end face of module 13 that abuts against module 2 14. Injection runner 134 is located at the end of module 13 near the connecting module 12. One end of injection runner 134 faces the end face of the connecting module 12, and the other end of injection runner 134 connects to the main runner 131. The inner diameter of injection runner 134 is larger than the inner diameter of the main runner 131.

[0047] Reference Figure 2 The end face of the connecting module 12 facing the first module 13 has connecting holes 121, 122, and 123. Connecting hole 121 communicates with injection runner 133, connecting hole 122 communicates with injection runner 134, and connecting hole 123 communicates with injection runner 141. The axes of connecting hole 121, connecting hole 122, and connecting hole 123 are parallel to each other. Connecting hole 121, connecting hole 122, and connecting hole 123 all pass through the connecting module 12 in a direction close to the injection module 11.

[0048] Reference Figure 2 and Figure 4 The injection module 11 has a main material port 111 on its end face, and an auxiliary material port 112 on the end face of the main material module away from the main material port 111. The main material port 111 passes through the injection module 11 and connects to the second connection hole 122 in the direction close to the connection module 12.

[0049] Reference Figure 2 and Figure 5 The injection module 11 has a through flow channel 113 on its end face facing the connecting module 12. The through flow channel 113 is n-shaped and connects injection flow channel one 133 and injection flow channel two 141, and surrounds the main material port 111. The auxiliary material port 112 passes through the injection module 11 and connects to the through flow channel 113 in a direction close to the connecting module 12.

[0050] Reference Figure 4 The main material inlet 111 is used for the main rubber material to enter, and the auxiliary material inlet 112 is used for the auxiliary rubber material to enter. In the embodiments of this application, both the auxiliary rubber material and the main rubber material are made of PP material, and the solubility of the auxiliary rubber material is higher than that of the main rubber material, which makes the flow rate of the auxiliary rubber material faster than that of the main rubber material, and the tensile strength of the auxiliary rubber material is better than that of the main rubber material.

[0051] Reference Figure 2 and Figure 5 The main rubber material flows from the main material inlet 111 through the connecting hole 2 122, the injection runner 3 134, and the main flow channel 131, and is discharged from the outlet 151. The auxiliary rubber material flows from the auxiliary material inlet 112 through the through flow channel 113, the connecting hole 121, the injection runner 133, and the auxiliary flow channel 132 between module 3 15 and module 1 13, and is discharged from the outlet 151. At the same time, the auxiliary rubber material in the through flow channel 113 flows through the connecting hole 3 123, the injection runner 2 141, and the auxiliary flow channel 132 between module 2 14 and module 4 16, and is discharged from the outlet 151. The main flow channel 131 is located between the two auxiliary flow channels 132. The auxiliary rubber material discharged from the two auxiliary flow channels 132 covers the end face of the main rubber material, so that the end face is not easily torn when the main rubber material cools and solidifies to form a sheet, thus speeding up the travel speed and improving the production speed of PP sheets.

[0052] Reference Figure 2 Multiple adjustment components 5 are connected to the forming module 1. The adjustment components 5 are used to control the size of the discharge port 151. The multiple adjustment components 5 are connected in sequence at even intervals on the end face of the fourth module 16 away from the third module 15, and the arrangement direction of the adjustment components 5 is parallel to the length direction of the fourth module 16.

[0053] Reference Figure 2 The end face of module 4 16 is connected to a protective cover 6. The protective cover 6 is fixed to the guide surface 161 by bolts and shields multiple adjustment components 5, so that the adjustment components 5 are not easily damaged by external environmental factors during operation, thereby improving the stability of the operation of the adjustment components 5.

[0054] Reference Figure 2 Module 4 16 has a guide surface 161 on its end face facing the adjustment component 5. The inclination height of the guide surface 161 increases as the distance to Module 2 14 decreases. The adjustment component 5 includes a thermal expansion and contraction block 51 and a heating tube 52. The heating tube 52 is fixed to the end face of Module 4 16 by bolts. In this embodiment, the thermal expansion and contraction block 51 is made of iron and has a certain coefficient of thermal expansion. One end of the thermal expansion and contraction block 51 is welded and fixed to the heating end of the heating tube 52, and the other end of the thermal expansion and contraction block 51 abuts against the guide surface 161 on the side away from Module 2 14.

[0055] Reference Figure 2 When the operator needs to reduce the size of the discharge port 151, the heating tube 52 operates and heats the thermal expansion and contraction block 51. The thermal expansion and contraction block 51 heats up and deforms, pressing against the guide surface 161 and driving module four 16 to slide closer to module three 15, thereby achieving automatic reduction of the discharge port 151. There is no need for the operator to adjust the position of module three 15 and module four 16, thus improving the ease of use of PP sheet molding mold.

[0056] The implementation principle of a PP sheet molding die according to an embodiment of this application is as follows: the main material flows from the main material port 111 through the connecting hole 122, the injection runner 134, and the main runner 131, and is discharged from the outlet 151; the auxiliary material flows from the auxiliary material port 112 through the through runner 113, the connecting hole 121, the injection runner 133, and the auxiliary runner 132 between module 3 15 and module 1 13, and is discharged from the outlet 151. At the same time, the auxiliary material in the through runner 113 flows through the through runner 113 in sequence. The auxiliary flow channel 132 connects the three holes 123, the two injection flow channels 141, the two modules 14 and the four modules 16 and discharges from the outlet 151; the main flow channel 131 is located between the two auxiliary flow channels 132, and the inner diameter of the outlet 151 is larger than the inner diameter of the main flow channel 131, providing space for the auxiliary material to enter the outlet 151, so that the auxiliary material discharged from the auxiliary flow channel 132 covers the end face of the main material, making it less likely to tear or pull apart when the main material cools and solidifies to form a sheet, speeding up the travel speed, thereby increasing the production speed of PP sheet.

[0057] Meanwhile, the two ends of the auxiliary flow channel 132 in the width direction correspond one-to-one with the two ends of the main flow channel 131 in the width direction. The auxiliary rubber material discharged from the discharge port 151 covers the two ends of the main rubber material in the width direction. The flow speed of the auxiliary rubber material is greater than that of the main rubber material, thereby driving the main rubber material to be discharged from the discharge port 151, further accelerating the speed at which the main rubber material is discharged from the discharge port 151, thereby increasing the production speed of PP sheets.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A PP sheet forming mold, characterized in that: The system includes a molding module (1), which has a main flow channel (131) and at least two auxiliary flow channels (132). The at least two auxiliary flow channels (132) are located on both sides of the main flow channel (131). One end of the molding module (1) has a main material inlet (111) and an auxiliary material inlet (112), and the other end of the molding module (1) has a discharge outlet (151). One end of the main flow channel (131) is connected to the main material inlet (111), and the other end of the main flow channel (131) is connected to the discharge outlet (151). One end of each of the at least two auxiliary flow channels (132) is connected to the auxiliary material inlet (112), and the other end of each of the at least two auxiliary flow channels (132) is connected to the discharge outlet (151). The auxiliary flow channels (132) contain... The number of molten rubber compounds in the auxiliary rubber compound is higher than that in the main rubber compound in the main channel (131). When the main rubber compound and the auxiliary rubber compound are injected into the main material port (111) and the auxiliary material port (112) respectively, the main rubber compound enters the outlet (151) from the main channel (131) and is discharged. At the same time, the auxiliary rubber compound enters the outlet (151) from the auxiliary channel (132) and adheres to the end face of the main rubber compound before being discharged. The molding module (1) includes module one (13), module two (14), module three (15) and module four (16). The ends of module three (15), module one (13), module two (14) and module four (16) are detachably connected in sequence. The main channel (131) is located between module one (13) and module two (14). Two auxiliary flow channels (132) are located one-to-one between module three (15) and module one (13) and between module two (14) and module four (16). The discharge port (151) is located between module three (15) and module four (16). An adjustment component (5) is connected to module four (16), which is used to control the size of the discharge port (151). A prompting cavity (152) is opened on the end face of module four (16) away from module two (14). The prompting cavity (152) penetrates module four (16) in the direction closer to module two (14). A prompting rod (3) is connected to module four (16). The prompting rod (3) is slidably connected to the inner wall of the prompting cavity (152). The sliding direction of the indicator rod (3) is closer to or further away from module two (14), and the end of the indicator rod (3) protrudes from the end face of module four (16) and faces module two (14); when module four (16) is connected to module two (14), the end face of module two (14) abuts against the end of the indicator rod (3) and drives the indicator rod (3) to slide away from module two (14), and the end of the indicator rod (3) is flush with the end face of module four (16); an elastic element (4) is connected between the indicator rod (3) and module four (16), and the elastic element (4) has the elastic force to drive the indicator rod (3) to slide closer to module two (14), and the end of the indicator rod (3) protrudes from the end face of module four (16).

2. The PP sheet forming mold according to claim 1, characterized in that: The inner diameter of the discharge port (151) is larger than the inner diameter of the main channel (131).

3. The PP sheet forming mold according to claim 1, characterized in that: The two ends of the auxiliary channel (132) in the width direction protrude one-to-one from the two ends of the main channel (131) in the width direction.

4. The PP sheet forming mold according to claim 1, characterized in that: The adjustment component (5) includes a thermal expansion and contraction block (51) and a heating tube (52). One end of the thermal expansion and contraction block (51) abuts against the end of module four (16) near the discharge port (151), and the other end of the thermal expansion and contraction block (51) is connected to the heating end of the heating tube (52). When the heating end of the heating tube (52) heats the thermal expansion and contraction block (51), the thermal expansion and contraction block (51) heats up and expands, and squeezes module four (16) to deform in the direction closer to module three (15), thereby realizing the adjustment of the size of the discharge port (151).

5. The PP sheet forming mold according to claim 4, characterized in that: The end face of module four (16) that abuts against the thermal expansion and contraction block (51) is provided with a guide surface (161), and the inclination height of the guide surface (161) increases as the distance to module two (14) decreases.

6. The PP sheet forming mold according to claim 4, characterized in that: Multiple adjustment components (5) are provided, and the arrangement direction of the adjustment components (5) is parallel to the width direction of the discharge port (151).

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