WO2020258679A1 - Forming mold for thin-wall multi-cavity plastic part - Google Patents

Forming mold for thin-wall multi-cavity plastic part Download PDF

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Publication number
WO2020258679A1
WO2020258679A1 PCT/CN2019/118769 CN2019118769W WO2020258679A1 WO 2020258679 A1 WO2020258679 A1 WO 2020258679A1 CN 2019118769 W CN2019118769 W CN 2019118769W WO 2020258679 A1 WO2020258679 A1 WO 2020258679A1
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WO
WIPO (PCT)
Prior art keywords
mold
sub
hole
thin
cavity
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PCT/CN2019/118769
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French (fr)
Chinese (zh)
Inventor
郭秋盛
郭秋波
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郭秋盛
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Publication of WO2020258679A1 publication Critical patent/WO2020258679A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2602—Mould construction elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/43—Removing or ejecting moulded articles using fluid under pressure
    • B29C45/435—Removing or ejecting moulded articles using fluid under pressure introduced between a mould core and a hollow resilient undercut article, e.g. bellows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C2045/2683—Plurality of independent mould cavities in a single mould

Definitions

  • the invention belongs to the technical field of injection molds, and particularly relates to a thin-walled multi-cavity plastic part forming mold.
  • Injection mold is a tool for producing plastic products. It is used to give plastic products a complete structure and precise dimensions. Thin-walled products are easy to cover on the mold core after molding, and it is difficult to demold.
  • the ejector ejection mechanism is adopted. The wall of the part is thin and easily damaged. Therefore, the thin-walled plastic parts are mostly used for air blow demolding.
  • the structure of the thin-walled multi-cavity plastic parts is complicated, and the fixed film moving film is required to form multiple cavities to form the plastic parts. Different cavities, the structure of the mold core is complex, and the opening space of the air flow channel is limited.
  • mold cores are mostly split structure. Since thin-walled plastic parts require higher injection pressure and molding accuracy than ordinary plastic parts, the strength and accuracy of the molding mold are required to be higher to ensure the product
  • the split structure of the mold core will reduce the structural strength, molding accuracy and surface finish of the mold, resulting in short mold life, mold cracking and water leakage, low matching accuracy, unguaranteed quality of plastic parts, and high defect rate.
  • the present invention provides a thin-wall multi-cavity plastic injection mold.
  • a thin-walled multi-cavity plastic part forming mold comprising a fixed mold, a movable mold, a guide mechanism and a pouring system, characterized in that a cavity is formed in the middle of the fixed mold, and a mold core is formed in the middle of the movable mold.
  • the mold core is One-piece structure, combined with the structure of the thin-walled multi-cavity plastic part to form multiple sub-mold cores, the cavity and the structure of the thin-walled multi-cavity plastic part form multiple sub-mold cavities, and the corresponding sub-mold cores are matched with the sub-mold A plurality of sub-cavities forming each cavity of the molded plastic part; each of the sub-mold cores is provided with at least one side blow hole on the outer side, and a pin plug is detachably installed in the side blow hole.
  • the pin plug and the side blow hole The installation gap between the two sides forms a blowing gap, and the side blowing holes are respectively connected with the corresponding air flow channels, and the air flow channels are formed at intervals in the sub-mold core; the pin plug is provided with a through positioning hole, and the axial direction of the positioning hole is aligned with the sub-mold The height direction of the core is the same.
  • the sub-mold core is provided with pin holes and thimble holes on the upper and lower sides of the side blow holes.
  • the pin holes extend upward through the upper end surface of the sub-mold core, and the thimble holes extend downward through the movable mold
  • the positioning hole, the pin hole, and the thimble hole are arranged coaxially, and the positioning pin is installed in the pin hole and extends downward to the positioning hole to fix the pin plug.
  • each sub-mold core is provided with an air cap hole, an air jet valve is installed in the air cap hole, and the air cap hole is respectively communicated with a corresponding air flow channel.
  • the integral structure of the mold core structure has high strength and stability, can prolong the service life of the mold, and has a smooth surface, high precision in matching with the mold cavity, and can improve the product quality of thin-walled multi-cavity plastic parts and avoid excessive production. Injection impression; each sub-mold core is provided with air top holes and side blowing holes.
  • the compressed gas can blow to the top and side walls of the different cavities of the thin-walled multi-cavity plastic part to make the thin-walled multi-cavity plastic
  • a uniform air layer is formed between the part and the mold core to facilitate the demolding of the plastic part, and the pressure of the compressed gas can be adjusted according to the shape and wall thickness of the thin-walled multi-cavity plastic part to ensure the demolding effect while ensuring the product quality;
  • the arrangement of pin holes and thimble holes can effectively solve the problems of fixing, dismounting and replacing pin plugs without destroying the integrity of the mold core.
  • the air output of the side blowing holes can be adjusted by replacing pin plugs of different sizes.
  • the movable mold is formed with a concave guide cone groove
  • the mold core is recessed in the guide cone groove
  • the fixed mold is formed with a convex guide cone
  • the mold cavity is recessed in the guide cone
  • the guide cone The inner conical surface of the groove cooperates with the outer conical surface of the guiding frustum to guide and position the clamping and opening of the movable mold and the fixed mold.
  • the guide cone groove and the guide cone table cooperate with other guide mechanisms to further improve the matching accuracy of the mold cavity and the mold core, thereby ensuring product quality.
  • the outer cone surface of the guide frustum is evenly provided with a plurality of installation grooves along the circumferential direction, the installation grooves are equipped with a wear block, the wear block is installed obliquely, and its inclination angle is the same as that of the outer cone surface.
  • the draft angle is the same.
  • the setting of the wear-resistant block can reduce the wear of the mating surface of the movable mold and the fixed mold and prolong the service life of the mold.
  • the shape of the wear-resistant block is matched with the installation groove, and is installed in the installation groove by bolts, the outer surface of the wear-resistant block protrudes from the outer conical surface, and the wear-resistant block can be installed between the groove bottom and the installation groove.
  • Adjusting shims are installed to adjust the matching accuracy of the movable mold and the fixed mold. After the fixed mold and the movable mold are worn out, the mating degree of the movable mold and the fixed mold can be adjusted by the gasket to prevent the molten material from overflowing and causing flash.
  • the movable mold is fixed on the movable mold seat plate, and parallel pads are installed on the bottom surface of the movable mold seat plate, and the strength of the parallel pads is higher than that of the movable mold seat plate.
  • thin-walled multi-cavity plastic parts are thin-walled injection products, in order to ensure product quality, very large injection pressure and clamping force are required.
  • the movable mold seat plate will be concave under the action of injection pressure and clamping force, which affects the dynamic
  • the matching of the fixed mold and the mold is easy to produce flash.
  • the adjustment pads can be installed by the pad to adjust the matching accuracy of the movable mold and the fixed mold to ensure product quality .
  • the side blowing hole is a gradually expanding hole, the diameter of which gradually increases from the inlet end to the outlet end.
  • the side blowing hole is set as a gradual reaming hole, which facilitates the installation and disassembly of the pin plug and ensures smooth air outlet.
  • the pin plug has a cylindrical structure with a first end surface, a second end surface and an annular side wall, wherein the annular side wall is adapted to the inner wall of the side blow hole, and the first end surface is located at the air outlet end of the side blow hole , And matched with the side molding surface of the sub-mold core to form an auxiliary molding surface.
  • the side molding surface so as to ensure the appearance quality of the injection molded product.
  • the second end surface is located at the air inlet end of the side blowing hole, and the outer edge of the second end surface is formed with a circular arc chamfer.
  • the arc-shaped chamfer can effectively avoid stress concentration and ensure the smooth flow of compressed gas.
  • annular groove is provided on the annular side wall of the pin plug along the circumferential direction, and the annular groove is arranged close to the first end surface.
  • the setting of the annular groove can avoid the poor air outflow caused by the thermal expansion of the mold core and the pin plug.
  • an air guiding groove is formed on the annular side wall of the pin plug along the length direction of the pin plug, and the air guiding groove extends from the outer edge of the second end surface into the annular groove.
  • the setting of the air guide groove can ensure the smooth air outlet from the side blowing hole, and prevent the mold core and pin plug from being locked after thermal expansion, hindering the flow of compressed gas; and the air guide groove is connected with the annular groove, which can redistribute the compressed gas in the annular groove , Blowing evenly along the outer peripheral surface of the pin plug towards the injection molded product, the demolding effect is better, and the phenomenon of whitening and cracking due to excessive pressure is avoided, and the quality of the plastic part is guaranteed.
  • a plurality of vertical cooling water channels are formed at intervals within each of the sub-mold cores, and the axial direction of the vertical cooling water channels is consistent with the axial direction of the air flow channel, and they are all opened along the height direction of the mold core.
  • a horizontal cooling water channel is opened on the lower end surface, and the vertical cooling water channel extends downward and communicates with the horizontal cooling water channel.
  • the vertical cooling water channel is consistent with the axial direction of the air flow channel, which can increase the cooling stroke of the cooling water, and the vertical cooling water channel can avoid the air flow channel, so that there is enough space inside the sub-mold core to ensure the number of cooling water channels. Its cooling effect improves the quality of injection molded products.
  • the horizontal cooling water channel opened on the lower end of the movable mold can further improve the cooling effect, and can connect multiple vertical cooling water channels into a continuous water channel, improving cooling efficiency.
  • a safe distance is set between the vertical cooling water passages and between the vertical cooling water passage and the air flow channel, and the safe distance is greater than 6 mm. Since the cooling water channel needs to be cleaned with strong acid regularly, a safety distance of 6mm or more can effectively avoid the cooling channel perforation and ensure the structural strength of the mold core.
  • the mold core is an integrated structure, which has high structural stability, can prolong the service life of the mold, and has high matching accuracy with the mold cavity, thereby ensuring thin-walled multi-cavity plastics
  • the product quality of the parts; each sub-mold core is provided with an air top hole and a side blowing hole.
  • the compressed gas can blow the top and side walls of the different cavities of the thin-walled multi-cavity plastic part to make the plastic part and the core A uniform air layer is formed between them to facilitate the demolding of the plastic parts, and the pressure of the compressed gas can be adjusted according to the shape and wall thickness of the thin-walled multi-cavity plastic parts, while ensuring the demolding effect and product quality; pin holes and thimble holes
  • the setting can effectively solve the problem of pin plug installation, fixing, disassembly and replacement without damaging the integrity of the mold core; the distribution of air flow channels and cooling water channels is reasonable and effective, which can ensure the strength of the sub-mold core while ensuring the demolding effect and Cooling effect; the setting of wear-resistant blocks and parallel pads can effectively extend the service life of the mold, and can adjust the matching accuracy of the movable mold and the fixed mold to ensure the quality of thin-walled multi-cavity plastic parts.
  • Figure 1 is a schematic diagram of the internal structure of the present invention.
  • Figure 2 is a schematic diagram of the structure of the movable mold in the present invention.
  • Figure 3 is a schematic diagram of the internal structure of the movable mold in the present invention.
  • Figure 4 is a schematic diagram of the pin plug structure of the present invention.
  • Figure 5 is a schematic diagram of another structure of the pin plug in the present invention.
  • Figure 6 is a schematic diagram of the bottom structure of the movable mold in the present invention.
  • Figure 7 is a schematic diagram of the fixed mold structure of the present invention.
  • Figure 8 is a schematic diagram of the bottom wall structure of the movable mold seat plate in the present invention.
  • Figure 9 is a schematic diagram of the structure of a multi-cavity lunch box
  • this embodiment discloses a thin-walled multi-cavity plastic molding mold, which includes a fixed mold 12, a movable mold 11, a guiding mechanism, and a pouring system.
  • a mold core is formed in the middle of the movable mold 11.
  • the middle part of the fixed mold 12 is formed with a mold cavity
  • the mold core is an integral structure
  • the structure of the thin-walled multi-cavity plastic part has a plurality of sub-mold cores 110, and the mold cavity is matched with the thin-walled multi-cavity plastic part.
  • Multiple sub-mold cavities 120, corresponding sub-mold core 110 and sub-mold 120 cooperate to form multiple sub-cavities of each cavity of the molded plastic part.
  • the integrated structure of the mold core has high strength and stability, which can prolong the service life of the mold , And the surface is smooth, and the matching accuracy with the mold cavity is high, which can improve the product quality of thin-walled multi-cavity plastic parts and avoid excessive injection marks; the thin-walled multi-cavity plastic parts in this embodiment are multi-cavity
  • the lunch box 40 has four cavities. See Figure 9 for its structure.
  • the sub-mold core 110 and the sub-mold 120 are matched with the multi-cavity lunch box 40. Each has four structures and cooperates to form four cavities; the casting system is set in
  • the hot runner plate 13 includes a main runner and a runner. The runner communicates with the injection molding machine to send the melt to each runner.
  • the mechanism includes a guide sleeve installed on the fixed mold 12 and a guide post installed on the movable mold 11.
  • the guide sleeve and the guide post cooperate to guide the opening and closing of the fixed mold 12 and the movable mold 11 to ensure the mold cavity and core Matching accuracy.
  • each sub-mold core 110 is provided with an air cap hole 112 at the top, and an air jet valve is installed in the air cap hole 112.
  • the model of the air jet valve in this embodiment is C-AJVSS6- 12. Its outer diameter is 6mm and it is made of stainless steel, including the body, piston rod, spring, and elastic split pin.
  • the gas top hole 112 is respectively connected with the corresponding air flow channel 113; in order to further improve the demolding effect, each sub-mold core
  • the outer part of 110 is also provided with a side blow hole 111, the side blow hole 111 is detachably installed with a pin plug 20, the installation gap between the pin plug 20 and the side blow hole 111 forms a blow gap, the air top hole 112 and The side blowing holes 111 are respectively communicated with the corresponding airflow channels 113.
  • the airflow channels 113 are formed inside the sub-mold core 110 at intervals, and their axial directions are consistent with the height direction of the sub-mold core 110.
  • the height direction of the sub-mold core 110 Refers to the moving direction of the sub-mold core 110 when the mold is closed. Since the multi-cavity lunch box 40 is easily covered in the sub-mold core 110 after being molded, each sub-mold core 110 is provided with an air top hole 112 and a side blow hole 111, The compressed air can blow air to the top and side walls of the different cavities of the multi-cavity lunch box 40, so that a uniform air layer is formed between the multi-cavity lunch box 40 and the mold core, which facilitates the demolding of the multi-cavity lunch box 40 and can According to the shape and wall thickness of the multi-cavity lunch box 40, the pressure of the compressed gas is adjusted to ensure the demolding effect while ensuring product quality.
  • the pin plug 20 is provided with a through positioning hole 21.
  • the axial direction of the positioning hole 21 is consistent with the height direction of the sub-mold core 110.
  • the sub-sub-mold core 110 is provided with pin holes 114 and 114 on the upper and lower sides of the side blowing holes 111, respectively.
  • the thimble hole 115, the pin hole 114 extends upward through the upper end surface of the sub-mold core 110, and the thimble hole 115 extends downward through the lower end surface of the movable mold 11.
  • the positioning hole 21, the pin hole 114, and the thimble hole 115 are the same
  • the pin hole 114 is a stepped hole.
  • the positioning pin is installed in the pin hole 114 and extends downward to the positioning hole 21 to fix the pin plug 20.
  • the pin hole 114 and the thimble hole 115 can be set without destroying the Under the premise of the integrity of the core 110, the problem of installation, fixing, disassembly and replacement of the pin plug 20 can be effectively solved.
  • the positioning pin installed in the pin hole 114 can fix the pin plug 20 to prevent it from loosening and falling off under the action of compressed gas.
  • disassembling and replacing the pin plug 20 first remove the positioning pin, then extend the thimble from the lower end of the thimble hole 115, use the thimble to pull the pin plug 20 out, and adjust the side blowing hole 111 by replacing the pin plug 20 of a different size. Blow volume.
  • the side blowing hole 111 is a gradually expanding hole whose diameter gradually increases from the inlet end to the outlet end.
  • the side blowing hole 111 is set as a gradually expanding hole to facilitate the installation and disassembly of the pin plug 20 and is formed on the side close to the outlet end.
  • the pin plug 20 has a cylindrical structure, and its outer contour is adapted to the inner wall of the side blowing hole 111.
  • the pin plug 20 has a first end surface 22 and a second end surface 22. The end surface 23.
  • the first end surface 22 is located at the air outlet end of the side blow hole 111 and matches the side molding surface of the sub-mold core 110 to form an auxiliary molding surface to improve the integrity and smoothness of the side molding surface, thereby ensuring injection molding
  • the appearance quality of the product is located at the inlet end of the side blowing hole 111, and the outer edge of the second end surface 23 is formed with an arc-shaped chamfer.
  • the arc-shaped chamfer can effectively avoid stress concentration and improve the pin plug.
  • the installation stability of 20 is stable, and the compressed gas is smoothly discharged;
  • the annular side wall of the pin plug 20 is provided with an annular groove 24 along the circumferential direction, and the annular groove 24 is arranged close to the first end surface 22.
  • an air guide groove 25 is also provided on the annular side wall along the axial direction of the pin plug 20.
  • the air guide groove 25 extends from the outer edge of the second end surface 23 to the annular recess In the groove 24, the arrangement of the annular groove 24 and the air guide groove 25 can ensure that the side blowing hole 111 is smoothly discharged, avoid the mold core and the pin plug 20 from being locked after being heated and expanded, and hinder the flow of compressed gas, and the air guide groove 25 and the annular recess
  • the groove 24 is connected to enable the compressed gas to be redistributed in the annular groove 24, and evenly blows toward the injection molded product along the outer peripheral surface of the pin plug 20, which has a better demolding effect and prevents excessive compressed gas pressure from damaging the injection molded product and causing perforation And top white; in this embodiment, the pin plug 20 and the pin are made of the same material as the sub-mold core 110 to ensure that they have a consistent coefficient of thermal expansion and
  • the movable mold 11 is formed with a concave guide cone groove 118, the core is sunken in the guide cone groove 118, and the fixed mold 12 is formed with a convex guide cone 121, the cavity is sunken in the guide cone 121, and the guide cone
  • the inner cone surface of the groove 118 cooperates with the outer cone surface of the guide frustum 121 to position and guide the clamping and opening of the movable mold 11 and the fixed mold 12, thereby further improving the matching accuracy of the mold cavity and the mold core, and is advantageous for injection molding
  • the pressure is maintained when the parts are formed to ensure product quality; the parting surface on the movable mold 11 is also provided with an annular exhaust groove for exhaust during injection molding; the outer cone of the guide frustum 121 is evenly provided in the circumferential direction Four installation grooves.
  • Wear blocks 122 are installed in the installation grooves.
  • the wear blocks 122 are installed obliquely, and the inclination angle is consistent with the draft angle of the outer cone.
  • the outer surface of the wear blocks 122 protrudes from the outside Since the movable mold 11 and the fixed mold 12 need to be opened and closed reciprocally, the matching surface is very easy to wear, which affects the matching accuracy of the mold.
  • the setting of the wear block 122 can reduce the wear of the movable mold 11 and the fixed mold 12 and extend the mold.
  • the shape of the wear block 122 matches the installation groove, and is installed in the installation groove by bolts, and an adjustment pad can be installed between the wear block 122 and the bottom of the installation groove to adjust the movable mold 11
  • the mating degree of the movable mold 11 and the fixed mold 12 can be adjusted by pads to prevent the molten material from overflowing and flashing; the movable mold 11 is fixed on On the movable mold seat plate 14, a parallel pad 30 is installed on the bottom surface of the movable mold seat plate 14.
  • the parallel pad 30 is located in the center of the bottom surface of the movable mold seat plate 14, because the thin-walled multi-cavity plastic part is in the molding process . In order to ensure product quality, very large injection pressure and clamping force are required.
  • the movable mold seat plate 14 will be concave under the repeated action of injection pressure and clamping force, which affects the cooperation of the movable mold 11 and the fixed mold 12.
  • the movable mold seat plate 14 can be compensated by setting the parallel spacer block 30 to improve its strength, and the matching accuracy of the movable mold 11 and the fixed mold 12 can be adjusted by the cushioning adjustment spacer to ensure product quality.
  • Each of the sub-mold cores 110 is formed with a plurality of vertical cooling water channels 116 at intervals.
  • the axial direction of the vertical cooling water channels 116 is consistent with the axial direction of the air flow channel 113, and they are all opened along the height direction of the mold core.
  • the lower end surface of 11 is provided with a horizontal cooling water channel 117.
  • the vertical cooling water channel 116 extends downward and communicates with the horizontal cooling water channel 117.
  • Each vertical cooling water channel 116 is provided with a water barrier along its axial direction. The water fins separate the cooling water channel into water inlet and outlet channels.
  • the vertical cooling water channel 116 and the air flow channel 113 have the same axial direction, which can increase the cooling stroke of the cooling water, and the vertical cooling water channel 116 can avoid the air flow channel 113, so that There is enough space inside the sub-mold core 110 to ensure the number of cooling water channels, ensure its cooling effect, and improve the quality of injection molded products.
  • the horizontal cooling water channels 117 opened on the lower end surface of the movable mold 11 can further improve the cooling effect and make more Two vertical cooling water channels 116 are connected to become a continuous water channel, which improves cooling efficiency and facilitates communication with external water supply devices; due to the high injection pressure of thin-walled multi-cavity plastic parts, the upper end surface of the sub-mold core 110 is the main pressure-bearing part.
  • the reserved distance between the upper end surface of the vertical cooling water channel 116 and the upper end surface of the sub-mold core 110 should be greater than 9 mm.
  • the above-mentioned reserved spacing is 11mm; since the vertical cooling water channel 116 needs to be cleaned with strong acid regularly, in order to avoid perforation, safety is set between the vertical cooling water channel 116 and between the vertical cooling water channel 116 and the air flow channel 113 The safety distance is greater than 6mm.
  • the setting of the reserved distance and the safety distance not only ensures the cooling effect of the cooling water channel, but also ensures the structural strength of the mold core, thereby effectively solving the problems of water leakage in the cooling water channel and cracking of the movable mold 11. Tool life.
  • the thin-walled multi-cavity plastic molding mold disclosed in the present invention has compact structure and convenient processing.
  • the mold core adopts an integrated structure, has high structural strength and stability, and has a long service life.
  • the mold core and mold cavity are under the action of multiple guiding and positioning mechanisms.
  • each sub-mold core 110 is provided with air cap holes 112 and side blow holes 111, which can form a uniform air layer between each cavity of the plastic part and the sub-mold core ,
  • the distribution of the air flow channel 113 and the cooling water channel is reasonable and effective, which can ensure the demolding effect and cooling effect while ensuring the structural strength of the sub-mold core 110.

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  • Mechanical Engineering (AREA)
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Abstract

Provided is a forming mold for a thin-wall multi-cavity plastic part, the forming mold comprising a fixed mold (12), a movable mold (11), a guide mechanism and a pouring system. A mold core is of an integrated structure and is provided with a plurality of sub-mold cores (110), a plurality of sub-mold cavities (120) are provided in a mold cavity, and the corresponding sub-mold cores (110) match the sub-mold cavities (120) to form a plurality of sub-cavities for forming plastic part cavities; at least one side blowing hole (111) is provided in an outer side part of each of the sub-mold cores (110), a pin plug (20) is detachably mounted in the side blowing hole (111), and a blowing clearance is formed by a mounting clearance between the pin plug (20) and the side blowing hole (111); and a through positioning hole (21) is formed in the pin plug (20), a pin hole (114) and an ejector pin hole (115) are provided at positions, located in an upper side and a lower side of the side blowing hole (111) respectively, inside the sub-mold core (110), the pin hole (114) extends upwards to penetrate an upper end face of the sub-mold core (110), the ejector pin hole (115) extends downwards to penetrate a lower end face of the movable mold (11), and the positioning hole (21), the pin hole (114) and the ejector pin hole (115) are arranged coaxially. The forming mold for the thin-wall multi-cavity plastic part is stable in terms of structure, convenient to machine and has a high matching precision, and the problems of the thin-wall multi-cavity plastic part being difficult to demold and the fact that the quality cannot be guaranteed can be effectively solved.

Description

一种薄壁多腔型塑件成型模具Thin-walled multi-cavity plastic part forming mould 技术领域Technical field
本发明属于注塑模具技术领域，特别涉及一种薄壁多腔型塑件成型模具。The invention belongs to the technical field of injection molds, and particularly relates to a thin-walled multi-cavity plastic part forming mold.
背景技术Background technique
注塑模具是一种生产塑胶制品的工具，用于赋予塑胶制品完整的结构和精确的尺寸，薄壁产品成型后易包覆在模芯上，脱模困难，采用顶杆脱模机构，由于塑件壁薄，极易受损，因此对薄壁塑件多采用气吹脱模，但是薄壁多腔型塑件结构复杂，需要定膜动膜配合形成多个型腔，以成型塑件的不同腔体，模芯的结构复杂，气流通道的开设空间受限，压缩气体很难均匀的到达塑件的各腔体，导致脱模效果不佳，且为方便气流通道及冷却水道的开设，降低模具加工难度及制造成本，模芯多采用分体式结构，由于薄壁塑件较普通塑件需要更高的注塑压力及成型精度，因此对成型模具的强度和精度要求更高，以保证产品的品质，但是分体式结构的模芯会降低模具的结构强度、成型精度以及表面光洁度，导致模具使用寿命短，模具开裂漏水，配合精确度不高，塑件品质无法保证，次品率高。Injection mold is a tool for producing plastic products. It is used to give plastic products a complete structure and precise dimensions. Thin-walled products are easy to cover on the mold core after molding, and it is difficult to demold. The ejector ejection mechanism is adopted. The wall of the part is thin and easily damaged. Therefore, the thin-walled plastic parts are mostly used for air blow demolding. However, the structure of the thin-walled multi-cavity plastic parts is complicated, and the fixed film moving film is required to form multiple cavities to form the plastic parts. Different cavities, the structure of the mold core is complex, and the opening space of the air flow channel is limited. It is difficult for the compressed gas to reach the cavities of the plastic part uniformly, resulting in poor demolding effect, and to facilitate the opening of air flow channels and cooling water channels. To reduce the difficulty of mold processing and manufacturing cost, mold cores are mostly split structure. Since thin-walled plastic parts require higher injection pressure and molding accuracy than ordinary plastic parts, the strength and accuracy of the molding mold are required to be higher to ensure the product However, the split structure of the mold core will reduce the structural strength, molding accuracy and surface finish of the mold, resulting in short mold life, mold cracking and water leakage, low matching accuracy, unguaranteed quality of plastic parts, and high defect rate.
发明内容Summary of the invention
本发明针对现有的薄壁多腔型塑件注塑模具结构稳定性差，配合精确度低，成品脱模困难，无法保证产品品质的问题，提供一种薄壁多腔型塑件成型模具。Aiming at the problems of poor structural stability of the existing thin-wall multi-cavity plastic injection mold, low matching accuracy, difficult product demolding, and inability to guarantee product quality, the present invention provides a thin-wall multi-cavity plastic injection mold.
本发明的目的可通过下列技术方案来实现：The purpose of the present invention can be achieved through the following technical solutions:
一种薄壁多腔型塑件成型模具，包括定模、动模、导向机构及浇注***，其特征在于，定模的中部成型有模腔，动模的中部成型有模芯，模芯为一体式结构，并配合薄壁多腔型塑件的结构形成多个子模芯，模腔配合 薄壁多腔型塑件的结构形成多个子模腔，相对应的子模芯与子模腔配合形成成型塑件各腔体的多个子型腔；每个所述子模芯的外侧部至少开设有一个侧吹孔，侧吹孔中可拆卸的安装有销塞，销塞与侧吹孔之间的安装间隙形成吹气间隙，侧吹孔分别与相应的气流通道连通，气流通道间隔成型于子模芯内部；所述销塞上开设有贯穿的定位孔，定位孔的轴向与子模芯的高度方向一致，子模芯内部在侧吹孔的上下两侧分别开设有销钉孔和顶针孔，销钉孔向上延伸贯穿子模芯的上端面，顶针孔向下延伸贯穿动模的下端面，所述定位孔、销钉孔、顶针孔同轴设置，定位销钉安装于销钉孔中并向下延伸至定位孔中，对销塞进行固定。A thin-walled multi-cavity plastic part forming mold, comprising a fixed mold, a movable mold, a guide mechanism and a pouring system, characterized in that a cavity is formed in the middle of the fixed mold, and a mold core is formed in the middle of the movable mold. The mold core is One-piece structure, combined with the structure of the thin-walled multi-cavity plastic part to form multiple sub-mold cores, the cavity and the structure of the thin-walled multi-cavity plastic part form multiple sub-mold cavities, and the corresponding sub-mold cores are matched with the sub-mold A plurality of sub-cavities forming each cavity of the molded plastic part; each of the sub-mold cores is provided with at least one side blow hole on the outer side, and a pin plug is detachably installed in the side blow hole. The pin plug and the side blow hole The installation gap between the two sides forms a blowing gap, and the side blowing holes are respectively connected with the corresponding air flow channels, and the air flow channels are formed at intervals in the sub-mold core; the pin plug is provided with a through positioning hole, and the axial direction of the positioning hole is aligned with the sub-mold The height direction of the core is the same. The sub-mold core is provided with pin holes and thimble holes on the upper and lower sides of the side blow holes. The pin holes extend upward through the upper end surface of the sub-mold core, and the thimble holes extend downward through the movable mold On the lower end surface, the positioning hole, the pin hole, and the thimble hole are arranged coaxially, and the positioning pin is installed in the pin hole and extends downward to the positioning hole to fix the pin plug.
作为优选，每个所述子模芯的顶部均开设有一个气顶孔，气顶孔中安装有喷气阀，所述气顶孔分别与相应的气流通道连通。Preferably, the top of each sub-mold core is provided with an air cap hole, an air jet valve is installed in the air cap hole, and the air cap hole is respectively communicated with a corresponding air flow channel.
一体式结构的模芯结构强度及稳定性高，能够延长模具使用寿命，且表面光洁，与模腔的配合精确度高，能够提高薄壁多腔型塑件的产品品质，避免产生过多的注塑印痕；每个子模芯上均开设有气顶孔和侧吹孔，压缩气体能够向薄壁多腔型塑件不同腔体的顶壁和侧壁进行吹气，使薄壁多腔型塑件与模芯之间形成均匀的空气层，方便塑件脱模，且可根据薄壁多腔型塑件的形状、壁厚调节压缩气体的气压，在保证脱模效果的同时保证产品品质；销钉孔和顶针孔的设置可在不破坏模芯整体性的前提下有效解决销塞的安装固定及拆卸更换的问题，通过更换不同的大小的销塞可调节侧吹孔的出气量。The integral structure of the mold core structure has high strength and stability, can prolong the service life of the mold, and has a smooth surface, high precision in matching with the mold cavity, and can improve the product quality of thin-walled multi-cavity plastic parts and avoid excessive production. Injection impression; each sub-mold core is provided with air top holes and side blowing holes. The compressed gas can blow to the top and side walls of the different cavities of the thin-walled multi-cavity plastic part to make the thin-walled multi-cavity plastic A uniform air layer is formed between the part and the mold core to facilitate the demolding of the plastic part, and the pressure of the compressed gas can be adjusted according to the shape and wall thickness of the thin-walled multi-cavity plastic part to ensure the demolding effect while ensuring the product quality; The arrangement of pin holes and thimble holes can effectively solve the problems of fixing, dismounting and replacing pin plugs without destroying the integrity of the mold core. The air output of the side blowing holes can be adjusted by replacing pin plugs of different sizes.
作为优选，所述动模上成型有内凹的导向锥槽，模芯内陷于导向锥槽中，所述定模上成型有外凸的导向锥台，模腔内陷于导向锥台中，导向锥槽的内锥面与导向锥台的外锥面相配合对动模与定模的合模及开模进行导向定位。导向锥槽和导向锥台配合其它导向机构能够进一步提高模腔和模芯的配合精确度，从而保证产品品质。Preferably, the movable mold is formed with a concave guide cone groove, the mold core is recessed in the guide cone groove, the fixed mold is formed with a convex guide cone, the mold cavity is recessed in the guide cone, and the guide cone The inner conical surface of the groove cooperates with the outer conical surface of the guiding frustum to guide and position the clamping and opening of the movable mold and the fixed mold. The guide cone groove and the guide cone table cooperate with other guide mechanisms to further improve the matching accuracy of the mold cavity and the mold core, thereby ensuring product quality.
作为优选，所述导向锥台的外锥面沿周向均匀开设有多个安装槽，所述安装槽中安装有耐磨块，所述耐磨块倾斜安装，其倾斜角度与外锥面的拔模斜度一致。耐磨块的设置能够减少动模定模配合面的磨损，延长模具 使用寿命。Preferably, the outer cone surface of the guide frustum is evenly provided with a plurality of installation grooves along the circumferential direction, the installation grooves are equipped with a wear block, the wear block is installed obliquely, and its inclination angle is the same as that of the outer cone surface. The draft angle is the same. The setting of the wear-resistant block can reduce the wear of the mating surface of the movable mold and the fixed mold and prolong the service life of the mold.
作为优选，所述耐磨块的形状与安装槽配合，并通过螺栓安装于安装槽中，耐磨块的外表面突出于外锥面设置，且耐磨块与安装槽的槽底之间能垫装调整垫片，以调整动模和定模的配合精度。定模动模发生磨损后，可通过垫装垫片调整动模定模的配合度，防止熔料外溢产生飞边。Preferably, the shape of the wear-resistant block is matched with the installation groove, and is installed in the installation groove by bolts, the outer surface of the wear-resistant block protrudes from the outer conical surface, and the wear-resistant block can be installed between the groove bottom and the installation groove. Adjusting shims are installed to adjust the matching accuracy of the movable mold and the fixed mold. After the fixed mold and the movable mold are worn out, the mating degree of the movable mold and the fixed mold can be adjusted by the gasket to prevent the molten material from overflowing and causing flash.
作为优选，所述动模固定在动模座板上，所述动模座板的底面安装有平行垫块，平行垫块的强度高于动模座板的强度。由于薄壁多腔型塑件属于薄壁注塑制品，为保证产品品质，需要非常大的注塑压力和锁模力，动模座板在注塑压力和锁模力的作用下会内凹，影响动模定模的配合，易产生飞边，通过设置平行垫块可对动模座板进行补偿，提高其强度，并可通过垫装调整垫片，调节动模定模的配合精度，保证产品品质。Preferably, the movable mold is fixed on the movable mold seat plate, and parallel pads are installed on the bottom surface of the movable mold seat plate, and the strength of the parallel pads is higher than that of the movable mold seat plate. Since thin-walled multi-cavity plastic parts are thin-walled injection products, in order to ensure product quality, very large injection pressure and clamping force are required. The movable mold seat plate will be concave under the action of injection pressure and clamping force, which affects the dynamic The matching of the fixed mold and the mold is easy to produce flash. By setting the parallel pads, the movable mold seat plate can be compensated to improve its strength. The adjustment pads can be installed by the pad to adjust the matching accuracy of the movable mold and the fixed mold to ensure product quality .
作为优选，所述侧吹孔为一渐扩孔，其孔径由进气端向出气端逐渐变大。侧吹孔设置为渐扩孔，方便销塞的安装拆卸，保证出气顺畅。Preferably, the side blowing hole is a gradually expanding hole, the diameter of which gradually increases from the inlet end to the outlet end. The side blowing hole is set as a gradual reaming hole, which facilitates the installation and disassembly of the pin plug and ensures smooth air outlet.
作为优选，所述销塞为柱形结构，具有第一端面、第二端面及环形侧壁，其中环形侧壁与侧吹孔的内壁相适应，所述第一端面位于侧吹孔的出气端，并与子模芯的侧部成型面相匹配形成辅助成型面。以提高侧部成型面的整体性，从而保证注塑制品的外观品质。Preferably, the pin plug has a cylindrical structure with a first end surface, a second end surface and an annular side wall, wherein the annular side wall is adapted to the inner wall of the side blow hole, and the first end surface is located at the air outlet end of the side blow hole , And matched with the side molding surface of the sub-mold core to form an auxiliary molding surface. To improve the integrity of the side molding surface, so as to ensure the appearance quality of the injection molded product.
作为优选，所述第二端面位于侧吹孔的进气端，第二端面的外缘形成有圆弧形倒角。圆弧形倒角能够有效避免应力集中，保证压缩气体的出气顺畅性。Preferably, the second end surface is located at the air inlet end of the side blowing hole, and the outer edge of the second end surface is formed with a circular arc chamfer. The arc-shaped chamfer can effectively avoid stress concentration and ensure the smooth flow of compressed gas.
作为优选，所述销塞的环形侧壁上沿周向开设有环形凹槽，所述环形凹槽靠近第一端面设置。环形凹槽的设置能够避免模芯及销塞受热膨胀导致的出气不畅。Preferably, an annular groove is provided on the annular side wall of the pin plug along the circumferential direction, and the annular groove is arranged close to the first end surface. The setting of the annular groove can avoid the poor air outflow caused by the thermal expansion of the mold core and the pin plug.
作为优选，所述销塞的环形侧壁上沿销塞的长度方向开设有导气槽，所述导气槽由第二端面的外缘延伸至环形凹槽内。导气槽的设置能够保证侧吹孔出气顺畅，避免模芯及销塞受热膨胀后抱死，阻碍压缩气体流通；且导气槽与环形凹槽连通，能够使压缩气体在环形凹槽重新分配，均匀的沿销塞的外周面吹向注塑制品，脱模效果更好，并避免压强过大出现顶白 和开裂的现象，保证塑件的质量。Preferably, an air guiding groove is formed on the annular side wall of the pin plug along the length direction of the pin plug, and the air guiding groove extends from the outer edge of the second end surface into the annular groove. The setting of the air guide groove can ensure the smooth air outlet from the side blowing hole, and prevent the mold core and pin plug from being locked after thermal expansion, hindering the flow of compressed gas; and the air guide groove is connected with the annular groove, which can redistribute the compressed gas in the annular groove , Blowing evenly along the outer peripheral surface of the pin plug towards the injection molded product, the demolding effect is better, and the phenomenon of whitening and cracking due to excessive pressure is avoided, and the quality of the plastic part is guaranteed.
作为优选，每个所述子模芯内部间隔成型有多个竖直冷却水道，所述竖直冷却水道的轴向与气流通道的轴向一致，均沿模芯的高度方向开设，动模的下端面上开设有水平冷却水道，所述竖直冷却水道向下延伸并与水平冷却水道连通。竖直冷却水道与气流通道的轴向一致，能够增加冷却水的冷却行程，且竖直冷却水道能够避开气流通道，使子模芯内部有足够的开设空间以保障冷却水道的开设数量，保证其冷却效果，提高注塑制品品质，动模下端面开设的水平冷却水道能够进一步提高冷却效果，且能够使多个竖直冷却水道连通成为一贯通水道，提高冷却效率。Preferably, a plurality of vertical cooling water channels are formed at intervals within each of the sub-mold cores, and the axial direction of the vertical cooling water channels is consistent with the axial direction of the air flow channel, and they are all opened along the height direction of the mold core. A horizontal cooling water channel is opened on the lower end surface, and the vertical cooling water channel extends downward and communicates with the horizontal cooling water channel. The vertical cooling water channel is consistent with the axial direction of the air flow channel, which can increase the cooling stroke of the cooling water, and the vertical cooling water channel can avoid the air flow channel, so that there is enough space inside the sub-mold core to ensure the number of cooling water channels. Its cooling effect improves the quality of injection molded products. The horizontal cooling water channel opened on the lower end of the movable mold can further improve the cooling effect, and can connect multiple vertical cooling water channels into a continuous water channel, improving cooling efficiency.
作为优选，所述竖直冷却水道之间及竖直冷却水道与气流通道之间设定有安全间距，所述安全间距大于6mm。由于冷却水道需要定期用强酸清洗，6mm以上的安全间距能够有效避免冷却水道穿孔，并保证模芯的结构强度。Preferably, a safe distance is set between the vertical cooling water passages and between the vertical cooling water passage and the air flow channel, and the safe distance is greater than 6 mm. Since the cooling water channel needs to be cleaned with strong acid regularly, a safety distance of 6mm or more can effectively avoid the cooling channel perforation and ensure the structural strength of the mold core.
与现有技术相比，本发明具有以下有益效果，模芯为一体式结构其结构稳定性高，能够延长模具使用寿命，且与模腔的配合精确度高，从而保证薄壁多腔型塑件的产品品质；每个子模芯上均开设有气顶孔和侧吹孔，压缩气体能够向薄壁多腔型塑件不同腔体的顶壁和侧壁进行吹气使塑件与模芯之间形成均匀的空气层，方便塑件脱模，且可根据薄壁多腔型塑件的形状、壁厚调节压缩气体的气压，同时保证脱模效果和产品品质；销钉孔和顶针孔的设置可在不破坏模芯整体性的前提下有效解决销塞的安装固定及拆卸更换的问题；气流通道与冷却水道分布合理有效，能够在保证子模芯结构强度的同时保证脱模效果和冷却效果；耐磨块和平行垫块的设置能够有效延长模具使用寿命，并能够调整动模定模的配合精度，保证薄壁多腔型塑件的品质。Compared with the prior art, the present invention has the following beneficial effects. The mold core is an integrated structure, which has high structural stability, can prolong the service life of the mold, and has high matching accuracy with the mold cavity, thereby ensuring thin-walled multi-cavity plastics The product quality of the parts; each sub-mold core is provided with an air top hole and a side blowing hole. The compressed gas can blow the top and side walls of the different cavities of the thin-walled multi-cavity plastic part to make the plastic part and the core A uniform air layer is formed between them to facilitate the demolding of the plastic parts, and the pressure of the compressed gas can be adjusted according to the shape and wall thickness of the thin-walled multi-cavity plastic parts, while ensuring the demolding effect and product quality; pin holes and thimble holes The setting can effectively solve the problem of pin plug installation, fixing, disassembly and replacement without damaging the integrity of the mold core; the distribution of air flow channels and cooling water channels is reasonable and effective, which can ensure the strength of the sub-mold core while ensuring the demolding effect and Cooling effect; the setting of wear-resistant blocks and parallel pads can effectively extend the service life of the mold, and can adjust the matching accuracy of the movable mold and the fixed mold to ensure the quality of thin-walled multi-cavity plastic parts.
附图说明Description of the drawings
图1为本发明内部结构示意图；Figure 1 is a schematic diagram of the internal structure of the present invention;
图2为本发明中动模结构示意图；Figure 2 is a schematic diagram of the structure of the movable mold in the present invention;
图3为本发明中动模内部结构示意图；Figure 3 is a schematic diagram of the internal structure of the movable mold in the present invention;
图4为本发明中销塞结构示意图；Figure 4 is a schematic diagram of the pin plug structure of the present invention;
图5为本发明中销塞另一结构示意图；Figure 5 is a schematic diagram of another structure of the pin plug in the present invention;
图6为本发明中动模底部结构示意图；Figure 6 is a schematic diagram of the bottom structure of the movable mold in the present invention;
图7为本发明中定模结构示意图；Figure 7 is a schematic diagram of the fixed mold structure of the present invention;
图8为本发明中动模座板底壁结构示意图；Figure 8 is a schematic diagram of the bottom wall structure of the movable mold seat plate in the present invention;
图9为多腔餐盒结构示意图；Figure 9 is a schematic diagram of the structure of a multi-cavity lunch box;
图中，动模11；定模12；热流道板13；动模座板14；子模芯110；侧吹孔111；气顶孔112；气流通道113；销钉孔114；顶针孔115；竖直冷却水道116；水平冷却水道117；导向锥槽118；销塞20；定位孔21；第一端面22；第二端面23；环形凹槽24；导气槽25；子模腔120；导向锥台121；耐磨块122；平行垫块30；多腔餐盒40。In the figure, the movable mold 11; the fixed mold 12; the hot runner plate 13; the movable mold seat plate 14; the sub-mold core 110; the side blow hole 111; the air top hole 112; the air flow channel 113; the pin hole 114; the thimble hole 115; Vertical cooling channel 116; horizontal cooling channel 117; guiding cone groove 118; pin plug 20; positioning hole 21; first end surface 22; second end surface 23; annular groove 24; air guide groove 25; sub-mold cavity 120; guide Frustum 121; Wear block 122; Parallel cushion block 30; Multi-cavity lunch box 40.
具体实施方式Detailed ways
以下是本发明的具体实施例，并结合附图对本发明的技术方案作进一步的描述，但本发明并不限于这些实施例。The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.
参见图1-9，本实施例公开一种薄壁多腔型塑件成型模具，其包括定模12、动模11、导向机构及浇注***，所述动模11的中部成型有模芯，所述定模12的中部成型有模腔，模芯为一体式结构，并配合薄壁多腔型塑件的结构具有多个子模芯110，模腔配合薄壁多腔型塑件的结构具有多个子模腔120，相对应的子模芯110与子模腔120配合形成成型塑件各腔体的多个子型腔，一体式结构的模芯结构强度及稳定性高，能够延长模具使用寿命，且表面光洁，与模腔的配合精确度高，能够提高薄壁多腔型塑件的产品品质，并避免产生过多的注塑印痕；本实施例中薄壁多腔型塑件为多腔餐盒40，具有四个腔体，其结构参见图9，子模芯110及子模腔120配合多腔餐盒40的结构均具有四个，并配合形成四个型腔；浇铸***设置于热流道板13中，包括主流道和分流道，主流道与注塑机连通将熔料送至各分流道，本实施例中分流道具有四个分别与四个子型腔连通，进行注胶； 导向机构包括安装于定模12的导向套及安装于动模11的导向柱，所述导向套与导向柱配合对定模12和动模11的开合进行导向，以保证模腔与模芯的配合精度。1-9, this embodiment discloses a thin-walled multi-cavity plastic molding mold, which includes a fixed mold 12, a movable mold 11, a guiding mechanism, and a pouring system. A mold core is formed in the middle of the movable mold 11. The middle part of the fixed mold 12 is formed with a mold cavity, the mold core is an integral structure, and the structure of the thin-walled multi-cavity plastic part has a plurality of sub-mold cores 110, and the mold cavity is matched with the thin-walled multi-cavity plastic part. Multiple sub-mold cavities 120, corresponding sub-mold core 110 and sub-mold 120 cooperate to form multiple sub-cavities of each cavity of the molded plastic part. The integrated structure of the mold core has high strength and stability, which can prolong the service life of the mold , And the surface is smooth, and the matching accuracy with the mold cavity is high, which can improve the product quality of thin-walled multi-cavity plastic parts and avoid excessive injection marks; the thin-walled multi-cavity plastic parts in this embodiment are multi-cavity The lunch box 40 has four cavities. See Figure 9 for its structure. The sub-mold core 110 and the sub-mold 120 are matched with the multi-cavity lunch box 40. Each has four structures and cooperates to form four cavities; the casting system is set in The hot runner plate 13 includes a main runner and a runner. The runner communicates with the injection molding machine to send the melt to each runner. In this embodiment, there are four runners communicating with four sub-cavities for glue injection; The mechanism includes a guide sleeve installed on the fixed mold 12 and a guide post installed on the movable mold 11. The guide sleeve and the guide post cooperate to guide the opening and closing of the fixed mold 12 and the movable mold 11 to ensure the mold cavity and core Matching accuracy.
对于有顶壁的塑件，每个所述子模芯110的顶部均开设有一个气顶孔112，气顶孔112中安装有喷气阀，本实施例中喷气阀的型号为C-AJVSS6-12,其外径为6mm，采用不锈钢材质，包括本体、活塞杆、弹簧、弹性开口销，所述气顶孔112分别与相应的气流通道113连通；为进一步提高脱模效果，每个子模芯110的外侧部还开设有一个侧吹孔111，侧吹孔111中可拆卸的安装有销塞20，销塞20与侧吹孔111之间的安装间隙形成吹气间隙，气顶孔112及侧吹孔111分别与相应的气流通道113连通，气流通道113间隔成型于子模芯110内部，且其轴向与子模芯110的高度方向一致，本实施例中子模芯110的高度方向指模具合模时子模芯110的移动方向，由于多腔餐盒40成型后极易包覆于子模芯110，每个子模芯110上均开设有气顶孔112和侧吹孔111，压缩气体能够向多腔餐盒40不同腔体的顶壁和侧壁进行吹气，使多腔餐盒40与模芯之间形成均匀的空气层，方便多腔餐盒40脱模，且可根据多腔餐盒40的形状、壁厚调节压缩气体的气压，在保证脱模效果的同时保证产品品质。For plastic parts with a top wall, each sub-mold core 110 is provided with an air cap hole 112 at the top, and an air jet valve is installed in the air cap hole 112. The model of the air jet valve in this embodiment is C-AJVSS6- 12. Its outer diameter is 6mm and it is made of stainless steel, including the body, piston rod, spring, and elastic split pin. The gas top hole 112 is respectively connected with the corresponding air flow channel 113; in order to further improve the demolding effect, each sub-mold core The outer part of 110 is also provided with a side blow hole 111, the side blow hole 111 is detachably installed with a pin plug 20, the installation gap between the pin plug 20 and the side blow hole 111 forms a blow gap, the air top hole 112 and The side blowing holes 111 are respectively communicated with the corresponding airflow channels 113. The airflow channels 113 are formed inside the sub-mold core 110 at intervals, and their axial directions are consistent with the height direction of the sub-mold core 110. In this embodiment, the height direction of the sub-mold core 110 Refers to the moving direction of the sub-mold core 110 when the mold is closed. Since the multi-cavity lunch box 40 is easily covered in the sub-mold core 110 after being molded, each sub-mold core 110 is provided with an air top hole 112 and a side blow hole 111, The compressed air can blow air to the top and side walls of the different cavities of the multi-cavity lunch box 40, so that a uniform air layer is formed between the multi-cavity lunch box 40 and the mold core, which facilitates the demolding of the multi-cavity lunch box 40 and can According to the shape and wall thickness of the multi-cavity lunch box 40, the pressure of the compressed gas is adjusted to ensure the demolding effect while ensuring product quality.
销塞20上开设有贯穿的定位孔21，定位孔21的轴向与子模芯110的高度方向一致，子子模芯110内部在侧吹孔111的上下两侧分别开设有销钉孔114和顶针孔115，销钉孔114向上延伸贯穿子子模芯110的上端面，顶针孔115向下延伸贯穿动模11的下端面，所述定位孔21、销钉孔114、顶针孔115同轴设置，销钉孔114为阶梯孔，定位销钉安装于销钉孔114中并向下延伸至定位孔21中，对销塞20进行固定，销钉孔114和顶针孔115的设置可在不破坏子模芯110整体性的前提下有效解决销塞20的安装固定及拆卸更换的问题，安装于销钉孔114中的定位销钉可对销塞20进行固定，避免其在压缩气体作用下松动脱落，需要拆卸更换销塞20时，先取下定位销钉，然后将顶针从顶针孔115的下端伸入，利用顶针将销塞20拨出，通过更换不同的大小的销塞20可调节侧吹孔111的吹气量。The pin plug 20 is provided with a through positioning hole 21. The axial direction of the positioning hole 21 is consistent with the height direction of the sub-mold core 110. The sub-sub-mold core 110 is provided with pin holes 114 and 114 on the upper and lower sides of the side blowing holes 111, respectively. The thimble hole 115, the pin hole 114 extends upward through the upper end surface of the sub-mold core 110, and the thimble hole 115 extends downward through the lower end surface of the movable mold 11. The positioning hole 21, the pin hole 114, and the thimble hole 115 are the same The pin hole 114 is a stepped hole. The positioning pin is installed in the pin hole 114 and extends downward to the positioning hole 21 to fix the pin plug 20. The pin hole 114 and the thimble hole 115 can be set without destroying the Under the premise of the integrity of the core 110, the problem of installation, fixing, disassembly and replacement of the pin plug 20 can be effectively solved. The positioning pin installed in the pin hole 114 can fix the pin plug 20 to prevent it from loosening and falling off under the action of compressed gas. When disassembling and replacing the pin plug 20, first remove the positioning pin, then extend the thimble from the lower end of the thimble hole 115, use the thimble to pull the pin plug 20 out, and adjust the side blowing hole 111 by replacing the pin plug 20 of a different size. Blow volume.
所述侧吹孔111为一渐扩孔，其孔径由进气端向出气端逐渐变大，侧吹孔111设置为渐扩孔，方便销塞20的安装拆卸，在靠近出气端的一侧形成有一挡沿，以方便销塞20安装，提高装配精确性；所述销塞20为柱形结构，其外轮廓与侧吹孔111的内壁相适应，销塞20具有第一端面22及第二端面23，所述第一端面22位于侧吹孔111的出气端，并与子模芯110的侧部成型面相匹配形成辅助成型面，以提高侧部成型面的整体性和光洁度，从而保证注塑制品的外观品质；所述第二端面23位于侧吹孔111的进气端，第二端面23的外缘形成有圆弧形倒角，圆弧形倒角能够有效避免应力集中，提高销塞20的安装稳固性，并保证压缩气体出气顺畅；所述销塞20的环形侧壁上沿周向开设有环形凹槽24，环形凹槽24靠近第一端面22设置，进一步地，销塞20的环形侧壁上沿销塞20的轴向还开设有导气槽25，导气槽25具有两个，并对称开设，所述导气槽25由第二端面23的外缘延伸至环形凹槽24内，环形凹槽24和导气槽25的设置能够保证侧吹孔111出气顺畅，避免模芯及销塞20受热膨胀后抱死，阻碍压缩气体流通，且导气槽25与环形凹槽24连通，能够使压缩气体在环形凹槽24进行重新分配，均匀的沿销塞20的外周面吹向注塑制品，脱模效果更好，并避免压缩气体气压过大损害注塑制品，造成穿孔和顶白；本实施例中销塞20及销钉与子模芯110的材质一样，以保证它们有一致的热胀冷缩系数，提高销塞20与子模芯110的配合度。The side blowing hole 111 is a gradually expanding hole whose diameter gradually increases from the inlet end to the outlet end. The side blowing hole 111 is set as a gradually expanding hole to facilitate the installation and disassembly of the pin plug 20 and is formed on the side close to the outlet end. There is a retaining edge to facilitate the installation of the pin plug 20 and improve the accuracy of assembly; the pin plug 20 has a cylindrical structure, and its outer contour is adapted to the inner wall of the side blowing hole 111. The pin plug 20 has a first end surface 22 and a second end surface 22. The end surface 23. The first end surface 22 is located at the air outlet end of the side blow hole 111 and matches the side molding surface of the sub-mold core 110 to form an auxiliary molding surface to improve the integrity and smoothness of the side molding surface, thereby ensuring injection molding The appearance quality of the product; the second end surface 23 is located at the inlet end of the side blowing hole 111, and the outer edge of the second end surface 23 is formed with an arc-shaped chamfer. The arc-shaped chamfer can effectively avoid stress concentration and improve the pin plug The installation stability of 20 is stable, and the compressed gas is smoothly discharged; the annular side wall of the pin plug 20 is provided with an annular groove 24 along the circumferential direction, and the annular groove 24 is arranged close to the first end surface 22. Further, the pin plug 20 An air guide groove 25 is also provided on the annular side wall along the axial direction of the pin plug 20. There are two air guide grooves 25 and are opened symmetrically. The air guide groove 25 extends from the outer edge of the second end surface 23 to the annular recess In the groove 24, the arrangement of the annular groove 24 and the air guide groove 25 can ensure that the side blowing hole 111 is smoothly discharged, avoid the mold core and the pin plug 20 from being locked after being heated and expanded, and hinder the flow of compressed gas, and the air guide groove 25 and the annular recess The groove 24 is connected to enable the compressed gas to be redistributed in the annular groove 24, and evenly blows toward the injection molded product along the outer peripheral surface of the pin plug 20, which has a better demolding effect and prevents excessive compressed gas pressure from damaging the injection molded product and causing perforation And top white; in this embodiment, the pin plug 20 and the pin are made of the same material as the sub-mold core 110 to ensure that they have a consistent coefficient of thermal expansion and contraction and improve the fit between the pin plug 20 and the sub-mold core 110.
动模11上成型有内凹的导向锥槽118，模芯内陷于导向锥槽118中，定模12上成型有外凸的导向锥台121，模腔内陷于导向锥台121中，导向锥槽118的内锥面与导向锥台121的外锥面相配合对动模11与定模12的合模及开模进行定位导向，从而进一步提高模腔和模芯的配合精确度，并利于注塑件成型时保压，从而保证产品品质；位于动模11上的分型面还开设有环形排气槽，用于注塑成型时排气；导向锥台121的外锥面沿周向均匀开设有四个安装槽，所述安装槽中安装有耐磨块122，所述耐磨块122倾斜安装，其倾斜角度与外锥面的拔模斜度一致，耐磨块122的外表面突出于外锥面设置，由于动模11定模12需要往复开合，其配合面极易磨损， 影响模具的配合精度，耐磨块122的设置能够减少动模11定模12配合面的磨损，延长模具使用寿命；所述耐磨块122的形状与安装槽配合，并通过螺栓安装于安装槽中，且耐磨块122与安装槽的槽底之间能垫装调整垫片，以调整动模11和定模12的配合精度，定模12动模11发生磨损后，可通过垫装垫片调整动模11定模12的配合度，防止熔料外溢产生飞边；所述动模11固定在动模座板14上，所述动模座板14的底面安装有平行垫块30，所述平行垫块30位于动模座板14底面的中央，由于薄壁多腔型塑件成型过程中，为保证产品品质，需要非常大的注塑压力和锁模力，动模座板14在注塑压力和锁模力的反复作用下会内凹，影响动模11定模12的配合，倒置塑件产生飞边，通过设置平行垫块30可对动模座板14进行补偿，提高其强度，并可通过垫装调整垫片，调节动模11定模12的配合精度，保证产品品质。The movable mold 11 is formed with a concave guide cone groove 118, the core is sunken in the guide cone groove 118, and the fixed mold 12 is formed with a convex guide cone 121, the cavity is sunken in the guide cone 121, and the guide cone The inner cone surface of the groove 118 cooperates with the outer cone surface of the guide frustum 121 to position and guide the clamping and opening of the movable mold 11 and the fixed mold 12, thereby further improving the matching accuracy of the mold cavity and the mold core, and is advantageous for injection molding The pressure is maintained when the parts are formed to ensure product quality; the parting surface on the movable mold 11 is also provided with an annular exhaust groove for exhaust during injection molding; the outer cone of the guide frustum 121 is evenly provided in the circumferential direction Four installation grooves. Wear blocks 122 are installed in the installation grooves. The wear blocks 122 are installed obliquely, and the inclination angle is consistent with the draft angle of the outer cone. The outer surface of the wear blocks 122 protrudes from the outside Since the movable mold 11 and the fixed mold 12 need to be opened and closed reciprocally, the matching surface is very easy to wear, which affects the matching accuracy of the mold. The setting of the wear block 122 can reduce the wear of the movable mold 11 and the fixed mold 12 and extend the mold. Service life; the shape of the wear block 122 matches the installation groove, and is installed in the installation groove by bolts, and an adjustment pad can be installed between the wear block 122 and the bottom of the installation groove to adjust the movable mold 11 With the accuracy of the matching with the fixed mold 12, after the fixed mold 12 and the movable mold 11 are worn out, the mating degree of the movable mold 11 and the fixed mold 12 can be adjusted by pads to prevent the molten material from overflowing and flashing; the movable mold 11 is fixed on On the movable mold seat plate 14, a parallel pad 30 is installed on the bottom surface of the movable mold seat plate 14. The parallel pad 30 is located in the center of the bottom surface of the movable mold seat plate 14, because the thin-walled multi-cavity plastic part is in the molding process , In order to ensure product quality, very large injection pressure and clamping force are required. The movable mold seat plate 14 will be concave under the repeated action of injection pressure and clamping force, which affects the cooperation of the movable mold 11 and the fixed mold 12. When flash occurs, the movable mold seat plate 14 can be compensated by setting the parallel spacer block 30 to improve its strength, and the matching accuracy of the movable mold 11 and the fixed mold 12 can be adjusted by the cushioning adjustment spacer to ensure product quality.
每个所述子模芯110内部间隔成型有多个竖直冷却水道116，所述竖直冷却水道116的轴向与气流通道113的轴向一致，均沿模芯的高度方向开设，动模11的下端面上开设有水平冷却水道117，所述竖直冷却水道116向下延伸并与水平冷却水道117连通，每个竖直冷却水道116内均沿其轴向安装有隔水片，隔水片将冷却水道分隔为进水通道和出水通道，竖直冷却水道116与气流通道113的轴向一致，能够增加冷却水的冷却行程，且竖直冷却水道116能够避开气流通道113，使子模芯110内部有足够的开设空间以保障冷却水道的开设数量，保证其冷却效果，提高注塑制品品质，动模11的下端面开设的水平冷却水道117能够进一步提高冷却效果，且能够使多个竖直冷却水道116连通成为一贯通水道，提高冷却效率，并方便与外部供水装置连通；由于薄壁多腔型塑件的注塑压力大，子模芯110的上端面为主要承压部位，因此在增加冷却水道深度以提高其冷却效果的同时，要兼顾子模芯110的结构强度，因此竖直冷却水道116的上端面与子模芯110上端面之间的预留间距应大于9mm，本实施例中上述预留间距为11mm；由于竖直冷却水道116需要定期用强酸清洗，为避免穿孔，竖直冷却水道116之间及竖直冷却水道116与气流通道113之间设定有安全间距， 所述安全间距大于6mm，预留间距和安全间距的设置在保证冷却水道冷却效果的同时，还保证了模芯的结构强度，从而有效解决冷却水道漏水和动模11开裂的问题，延长模具使用寿命。Each of the sub-mold cores 110 is formed with a plurality of vertical cooling water channels 116 at intervals. The axial direction of the vertical cooling water channels 116 is consistent with the axial direction of the air flow channel 113, and they are all opened along the height direction of the mold core. The lower end surface of 11 is provided with a horizontal cooling water channel 117. The vertical cooling water channel 116 extends downward and communicates with the horizontal cooling water channel 117. Each vertical cooling water channel 116 is provided with a water barrier along its axial direction. The water fins separate the cooling water channel into water inlet and outlet channels. The vertical cooling water channel 116 and the air flow channel 113 have the same axial direction, which can increase the cooling stroke of the cooling water, and the vertical cooling water channel 116 can avoid the air flow channel 113, so that There is enough space inside the sub-mold core 110 to ensure the number of cooling water channels, ensure its cooling effect, and improve the quality of injection molded products. The horizontal cooling water channels 117 opened on the lower end surface of the movable mold 11 can further improve the cooling effect and make more Two vertical cooling water channels 116 are connected to become a continuous water channel, which improves cooling efficiency and facilitates communication with external water supply devices; due to the high injection pressure of thin-walled multi-cavity plastic parts, the upper end surface of the sub-mold core 110 is the main pressure-bearing part. Therefore, while increasing the depth of the cooling water channel to improve its cooling effect, it is necessary to take into account the structural strength of the sub-mold core 110. Therefore, the reserved distance between the upper end surface of the vertical cooling water channel 116 and the upper end surface of the sub-mold core 110 should be greater than 9 mm. In this embodiment, the above-mentioned reserved spacing is 11mm; since the vertical cooling water channel 116 needs to be cleaned with strong acid regularly, in order to avoid perforation, safety is set between the vertical cooling water channel 116 and between the vertical cooling water channel 116 and the air flow channel 113 The safety distance is greater than 6mm. The setting of the reserved distance and the safety distance not only ensures the cooling effect of the cooling water channel, but also ensures the structural strength of the mold core, thereby effectively solving the problems of water leakage in the cooling water channel and cracking of the movable mold 11. Tool life.
本发明公开的薄壁多腔型塑件成型模具结构紧凑，加工方便，模芯采用一体式结构，结构强度及稳定性高，使用寿命长，模芯与模腔在多重导向定位机构的作用下，配合精确度高，从而保证了薄壁多腔型塑件的产品品质；耐磨块122和平行垫块30的设置能够有效延长模具使用寿命，并能够调整动模11定模12的配合精度，进一步保证薄壁多腔型塑件的品质；每个子模芯110上均开设有气顶孔112和侧吹孔111，能够使塑件各腔体与子模芯之间形成均匀的空气层，方便塑件脱模；气流通道113与冷却水道分布合理有效，能够在保证子模芯110结构强度的同时保证脱模效果和冷却效果。The thin-walled multi-cavity plastic molding mold disclosed in the present invention has compact structure and convenient processing. The mold core adopts an integrated structure, has high structural strength and stability, and has a long service life. The mold core and mold cavity are under the action of multiple guiding and positioning mechanisms. , The matching accuracy is high, thus ensuring the product quality of thin-walled multi-cavity plastic parts; the setting of the wear block 122 and the parallel pad 30 can effectively extend the service life of the mold, and can adjust the matching accuracy of the movable mold 11 and the fixed mold 12 , To further ensure the quality of thin-walled multi-cavity plastic parts; each sub-mold core 110 is provided with air cap holes 112 and side blow holes 111, which can form a uniform air layer between each cavity of the plastic part and the sub-mold core , To facilitate the demolding of plastic parts; the distribution of the air flow channel 113 and the cooling water channel is reasonable and effective, which can ensure the demolding effect and cooling effect while ensuring the structural strength of the sub-mold core 110.
应该理解，在本发明的权利要求书、说明书中，所有“包括……”均应理解为开放式的含义，也就是其含义等同于“至少包含……”，而不应理解为封闭式的含义，即其含义不应该理解为“仅包含……”。It should be understood that in the claims and specification of the present invention, all "including..." should be understood as open-ended meaning, that is, its meaning is equivalent to "at least including...", and should not be understood as closed-ended Meaning, that is, its meaning should not be understood as "only containing...".
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，本技术领域的技术人员在本发明的实质范围内所做出的变化、改型、添加或替换，都应涵盖在发明的保护范围之内。The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to this, changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention , Should be covered within the scope of protection of the invention.

Claims (10)

  1. 一种薄壁多腔型塑件成型模具，包括定模(12)、动模(11)、导向机构及浇注***，其特征在于，定模(12)的中部成型有模腔，动模(11)的中部成型有模芯，模芯为一体式结构，并配合薄壁多腔型塑件的结构形成多个子模芯(110)，模腔配合薄壁多腔型塑件的结构形成多个子模腔(120)，相对应的子模芯(110)与子模腔(120)配合形成成型塑件各腔体的多个子型腔；每个所述子模芯(110)的外侧部至少开设有一个侧吹孔(111)，侧吹孔(111)中可拆卸的安装有销塞(20)，销塞(20)与侧吹孔(111)之间的安装间隙形成吹气间隙，侧吹孔(111)分别与相应的气流通道(113)连通，气流通道(113)间隔成型于子模芯(110)内部；所述销塞(20)上开设有贯穿的定位孔(21)，定位孔(21)的轴向与子模芯(110)的高度方向一致，子模芯(110)内部在侧吹孔(111)的上下两侧分别开设有销钉孔(114)和顶针孔(115)，销钉孔(114)向上延伸贯穿子模芯(110)的上端面，顶针孔(115)向下延伸贯穿动模(11)的下端面，所述定位孔(21)、销钉孔(114)、顶针孔(115)同轴设置，定位销钉安装于销钉孔(114)中并向下延伸至定位孔(21)中，对销塞(20)进行固定。A thin-walled multi-cavity plastic part forming mold, comprising a fixed mold (12), a movable mold (11), a guiding mechanism and a pouring system, characterized in that a cavity is formed in the middle of the fixed mold (12), and the movable mold ( 11) A mold core is formed in the middle of the mold core. The mold core is an integrated structure and forms multiple sub-mold cores (110) with the structure of the thin-walled multi-cavity plastic part. A plurality of sub-mold cavities (120), the corresponding sub-mold core (110) and the sub-mold cavity (120) cooperate to form multiple sub-cavities of each cavity of the molded plastic part; the outer part of each sub-mold core (110) At least one side blow hole (111) is provided, a pin plug (20) is detachably installed in the side blow hole (111), and the installation gap between the pin plug (20) and the side blow hole (111) forms a blowing gap , The side blowing holes (111) are respectively communicated with the corresponding air channels (113), and the air channels (113) are formed at intervals inside the sub-mold core (110); the pin plug (20) is provided with a through positioning hole (21) ), the axial direction of the positioning hole (21) is consistent with the height direction of the sub-mold core (110). The sub-mold core (110) is provided with pin holes (114) and top on the upper and lower sides of the side blowing holes (111). The pin hole (115), the pin hole (114) extends upward through the upper end surface of the sub-mold core (110), the thimble hole (115) extends downward through the lower end surface of the movable mold (11), the positioning hole (21) The pin hole (114) and the thimble hole (115) are coaxially arranged, and the positioning pin is installed in the pin hole (114) and extends downward to the positioning hole (21) to fix the pin plug (20).
  2. 根据权利要求1所述的一种薄壁多腔型塑件成型模具，其特征在于，所述动模(11)上成型有内凹的导向锥槽(118)，模芯内陷于导向锥槽(118)中，所述定模(12)上成型有外凸的导向锥台(121)，模腔内陷于导向锥台(121)中，导向锥槽(118)的内锥面与导向锥台(121)的外锥面相配合对动模(11)与定模(12)的合模及开模进行导向定位。The thin-walled multi-cavity plastic molding mold according to claim 1, wherein the movable mold (11) is formed with a concave guide cone groove (118), and the mold core is recessed in the guide cone groove In (118), the fixed mold (12) is formed with a convex guide frustum (121), the cavity is sunken in the guide frustum (121), the inner cone surface of the guide cone groove (118) and the guide cone The outer cone surface of the table (121) cooperates to guide and position the clamping and opening of the movable mold (11) and the fixed mold (12).
  3. 根据权利要求2所述的一种薄壁多腔型塑件成型模具，其特征在于，所述导向锥台(121)的外锥面沿周向均匀开设有多个安装槽，所述安装槽中安装有耐磨块(122)，所述耐磨块(122)倾斜安装，其倾斜角度与外锥面的拔模斜度一致。The thin-walled multi-cavity plastic molding mold according to claim 2, wherein the outer cone of the guide frustum (121) is evenly provided with a plurality of installation grooves along the circumferential direction, and the installation grooves A wear-resistant block (122) is installed in the center, and the wear-resistant block (122) is installed obliquely, and its inclination angle is consistent with the draft angle of the outer cone surface.
  4. 根据权利要求3所述的一种薄壁多腔型塑件成型模具，其特征在于，所述耐磨块(122)的形状与安装槽配合，并通过螺栓安装于安装槽中，耐磨块(122)的外表面突出于外锥面设置，且耐磨块(122)与安装槽的槽 底之间能垫装调整垫片，以调整动模(11)和定模(12)的配合精度。The thin-walled multi-cavity plastic molding mold according to claim 3, wherein the shape of the wear-resistant block (122) is matched with the installation groove, and is installed in the installation groove by bolts. The outer surface of (122) protrudes from the outer conical surface, and an adjustment gasket can be installed between the wear block (122) and the bottom of the installation groove to adjust the coordination of the movable mold (11) and the fixed mold (12) Accuracy.
  5. 根据权利要求1所述的一种薄壁多腔型塑件成型模具，其特征在于，所述动模(11)固定在动模座板(14)上，所述动模座板(14)的底面安装有平行垫块(30)，平行垫块(30)的强度高于动模座板(14)的强度。The thin-walled multi-cavity plastic molding mold according to claim 1, wherein the movable mold (11) is fixed on the movable mold seat plate (14), and the movable mold seat plate (14) Parallel pads (30) are installed on the bottom surface of the parallel pads, and the strength of the parallel pads (30) is higher than that of the movable mold seat plate (14).
  6. 根据权利要求1-5任一项所述的一种薄壁多腔型塑件成型模具，其特征在于，所述销塞(20)为柱形结构，具有第一端面(22)、第二端面(23)及环形侧壁，其中环形侧壁与侧吹孔(111)的内壁相适应，所述第一端面(22)位于侧吹孔(111)的出气端，并与子模芯(110)的侧部成型面相匹配形成辅助成型面。The thin-walled multi-cavity plastic molding mold according to any one of claims 1-5, wherein the pin plug (20) is a cylindrical structure with a first end surface (22), a second The end surface (23) and the annular side wall, wherein the annular side wall is adapted to the inner wall of the side blow hole (111), and the first end surface (22) is located at the air outlet end of the side blow hole (111) and is connected to the sub-mold core ( The side molding surface of 110) matches to form an auxiliary molding surface.
  7. 根据权利要求6所述的一种薄壁多腔型塑件成型模具，其特征在于，所述第二端面(23)位于侧吹孔(111)的进气端，第二端面(23)的外缘形成有圆弧形倒角。The thin-walled multi-cavity plastic molding mold according to claim 6, wherein the second end surface (23) is located at the air inlet end of the side blow hole (111), and the second end surface (23) The outer edge is formed with a circular arc chamfer.
  8. 根据权利要求6所述的一种薄壁多腔型塑件成型模具，其特征在于，所述销塞(20)的环形侧壁上沿周向开设有环形凹槽(24)，所述环形凹槽(24)靠近第一端面(22)设置。The thin-walled multi-cavity plastic molding mold according to claim 6, wherein the annular side wall of the pin plug (20) is provided with an annular groove (24) along the circumferential direction. The groove (24) is arranged close to the first end surface (22).
  9. 根据权利要求8所述的一种薄壁多腔型塑件成型模具，其特征在于，所述销塞(20)的环形侧壁上沿销塞(20)的长度方向开设有导气槽(25)，所述导气槽(25)由第二端面(23)的外缘延伸至环形凹槽(24)内。The thin-walled multi-cavity plastic molding mold according to claim 8, wherein the annular side wall of the pin plug (20) is provided with an air guide groove (20) along the length direction of the pin plug (20). 25), the air guide groove (25) extends from the outer edge of the second end surface (23) into the annular groove (24).
  10. 根据权利要求1-5任一项所述的一种薄壁多腔型塑件成型模具，其特征在于，每个所述子模芯(110)内部间隔成型有多个竖直冷却水道(116)，所述竖直冷却水道(116)的轴向与气流通道(113)的轴向一致，均沿模芯的高度方向开设，动模(11)的下端面上开设有水平冷却水道(117)，所述竖直冷却水道(116)向下延伸并与水平冷却水道(117)连通；所述竖直冷却水道(116)之间及竖直冷却水道(116)与气流通道(113)之间设定有安全间距，所述安全间距大于6mm。The thin-walled multi-cavity plastic molding mold according to any one of claims 1-5, wherein each sub-mold core (110) is formed with a plurality of vertical cooling channels (116) at intervals. ), the axial direction of the vertical cooling water channel (116) is consistent with the axial direction of the air flow channel (113), and both are opened along the height direction of the mold core, and the lower end surface of the movable mold (11) is provided with a horizontal cooling channel (117 ), the vertical cooling water channel (116) extends downward and communicates with the horizontal cooling water channel (117); between the vertical cooling water channels (116) and between the vertical cooling water channel (116) and the air flow channel (113) A safety distance is set between them, and the safety distance is greater than 6mm.
PCT/CN2019/118769 2019-06-28 2019-11-15 Forming mold for thin-wall multi-cavity plastic part WO2020258679A1 (en)

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CN110341122A (en) * 2019-06-28 2019-10-18 金华市利盛塑模有限公司 A kind of thin-walled multi-cavity plastic parts moulding mold
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