WO2020258680A1 - 一种镶块式脱模机构 - Google Patents

一种镶块式脱模机构 Download PDF

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Publication number
WO2020258680A1
WO2020258680A1 PCT/CN2019/118774 CN2019118774W WO2020258680A1 WO 2020258680 A1 WO2020258680 A1 WO 2020258680A1 CN 2019118774 W CN2019118774 W CN 2019118774W WO 2020258680 A1 WO2020258680 A1 WO 2020258680A1
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WIPO (PCT)
Prior art keywords
insert
hole
core
cooling water
demolding mechanism
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PCT/CN2019/118774
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English (en)
French (fr)
Inventor
郭秋盛
郭秋波
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郭秋盛
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Publication of WO2020258680A1 publication Critical patent/WO2020258680A1/zh

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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
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C45/7312—Construction of heating or cooling fluid flow channels

Definitions

  • the invention belongs to the technical field of injection molds, and particularly relates to a block-type demolding mechanism.
  • Injection molds are widely used in the production and manufacturing of plastic products. After cooling and forming, the plastic parts need to be demolded under the action of the demolding structure.
  • the demolding mechanisms that are currently used are push plates and ejectors. For thin-walled deep cavity plastic parts, Thin and easy to damage, and the adsorption force of the injection molded product on the core is large, it is difficult to demold. If the above demolding mechanism is used for demolding, it is not only easy to damage the plastic part, but also in order to completely eject the plastic part from the core, it is generally required The height of the mold foot is greater than the depth of the product to meet the needs of the ejection stroke.
  • the steel consumption of the mold and the processing cost increase, the working stroke required for opening and closing the mold becomes longer, and the injection pressure of thin-walled products is large, so large
  • the injection molding machine with tonnage clamping force is matched with injection molding, resulting in high energy consumption, low efficiency, and high defective rate of the injection molding process of thin-walled deep cavity products.
  • blowing and demolding methods are now used for thin-walled plastic parts.
  • the mold cores mostly adopt a split structure, which causes the accuracy and strength of the mold to be reduced, and the cooling water channel leaks, which affects the service life and product quality of the mold.
  • the purpose of the present invention is to solve the problems of difficulty in demolding the existing thin-walled and deep cavity plastic parts, the quality cannot be guaranteed, and the difficulty in processing the forming mold, high cost, and short service life, and to provide an insert demoulding mechanism.
  • a block-type demolding mechanism includes a core formed in a movable mold, and is characterized in that the core is an integrated structure, and a straight side blow hole is arranged inside the core, and the side blow hole penetrates the entire core transversely. And communicate with the corresponding air flow channel, the air flow channel is formed inside the core; the side blowing hole is embedded with inserts, the inserts have a first end surface, a second end surface and an annular side wall, the annular side wall Compatible with the inner wall of the side blow hole, the installation gap between the insert and the side blow hole forms an air gap, and the outer edges of the first end surface and the second end face opposite to each other cooperate with the two ports of the side blow hole to form two Two annular blowing ports are distributed on the side molding surface of the core, and the first end surface and the second end surface are matched with the side molding surface of the core to form an auxiliary molding surface.
  • two annular blowing ports can be formed on the side molding surface of the core, which reduces the processing difficulty and manufacturing cost of the mold; the compressed gas flows into the thin-walled deep cavity through the annular blowing port
  • the side wall of the plastic part is blown to form an air layer between the plastic part and the core, which facilitates 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 injection molded product to avoid excessive pressure damaging the plastic part
  • the integral structure of the core can effectively avoid the problems of water leakage in the cooling channel and cracking of the movable mold, prolong the service life of the mold, and ensure the structural stability of the core, improve the appearance quality of injection molded products, and avoid excessive injection marks.
  • the lower side of the side blowing hole is provided with a mounting hole for installing fasteners
  • the axial direction of the mounting hole is perpendicular to the length direction of the side blowing hole
  • the mounting hole is coaxially provided with a mounting hole below the mounting hole.
  • the upper end of the hole communicates with the mounting hole, and the lower end of the mounting hole extends downward and penetrates the lower end surface of the movable mold.
  • the fastener can further improve the installation stability of the insert, avoid its loosening and displacement under the action of compressed gas, and through the arrangement of the assembly hole, the assembly of the fastener can be completed without damaging the integrated core structure.
  • the hole diameter of the mounting hole is larger than the hole diameter of the mounting hole, the connecting position forms a stepped edge, the wall of the mounting hole is provided with internal threads, and the fastener is an inner hexagonal fastening bolt.
  • the fastening bolt is installed In the mounting hole, the upper end surface abuts against the side wall of the insert.
  • the cross section of the insert is rectangular, and its annular side wall is enclosed by four side walls of a planar structure.
  • the side wall of the planar structure can provide a reliable force position for the fastening bolts, ensure the fastening effect of the fastening bolts, and provide interaction forces in different directions at the matching positions of the insert and the side blow hole to improve the installation of the insert Stability.
  • the four end corners of the insert are all arc-shaped chamfers, and the four end corners of the side blow holes are also chamfers that match the end corners of the insert.
  • the end angles of the insert and the side blow hole are set to an arc chamfer relative to the right angle, which can effectively avoid the thermal expansion of the insert.
  • the right angle end angle directly acts on the inner wall of the side blow hole, causing stress concentration, causing damage to the mold, and causing the mold Cracking, while avoiding damage to the insert, thereby effectively improving the strength and service life of the insert and the mold.
  • At least one air cap hole is provided on the top of the core, an air jet valve is installed in the air cap hole, and the air cap hole communicates with a corresponding air flow channel.
  • the setting of the air cap hole can blow air to the top wall, which is beneficial to demolding the injection molded product.
  • the air cap holes there are two air cap holes, and they are diagonally distributed on the top of the core.
  • the diagonal arrangement of the air cap holes can improve the effectiveness of air blowing, so that the effective area of the compressed gas blown by the air cap holes is larger, and the demolding effect is improved.
  • the air flow channels are formed inside the core at intervals, and a plurality of vertical cooling water channels are formed at intervals in the core, and the axial direction of the vertical cooling water channels is consistent with the axial direction of the air flow channels, all along the height of the core.
  • the axial direction of the vertical cooling water channel is consistent with the air flow channel, which can increase the cooling stroke of the cooling water, and the cooling water channel can effectively avoid the air flow channel to avoid interference between the air flow channel and the cooling water channel, so that there is enough space inside the core to ensure The number of cooling water channels can ensure the cooling effect and improve the quality of plastic parts.
  • the lower end surface of the movable mold is provided with a horizontal cooling water channel, and the vertical cooling water channel extends downward to communicate with the horizontal cooling water channel.
  • the above arrangement can further improve the cooling effect, and can connect a plurality of vertical cooling water channels to form a through water channel, improve the cooling effect, and facilitate the communication with the external water channel.
  • 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 water channel perforation and ensure the structural strength of the core.
  • the mold release effect of thin-walled deep cavity plastic parts can be effectively improved through the cooperation of inserts and side blow holes; the inserts can be easily installed and disassembled without damaging the overall structure of the core
  • the structure design of the insert is reasonable, and the setting of the arc chamfer can effectively avoid stress concentration, prolong the service life of the insert and the mold, and can ensure smooth and uniform air outlet under high temperature environment, thereby ensuring the demolding effect and product quality;
  • the core is a one-piece structure, which is easy to process and manufacture.
  • the distribution of air flow channels and cooling water channels is reasonable and effective. It can ensure the strength of the core structure while ensuring the demolding effect and cooling effect, thereby improving the quality of injection products and extending the service life of the mold.
  • Figure 1 is a schematic diagram of the structure of the present invention
  • Figure 2 is a schematic diagram of the internal structure of the present invention.
  • Figure 3 is a schematic diagram of the structure of the insert in the present invention.
  • FIG. 4 is a schematic diagram of the bottom structure of the movable mold in the present invention.
  • the movable mold 11 the core 110; the air top hole 111; the first airflow channel 112; the vertical cooling water channel 113; the horizontal cooling water channel 114; the second airflow channel 115; the assembly hole 116; the second airflow channel 115; Block 30; first end surface 31; annular side wall 32; curved chamfer 33.
  • this embodiment discloses a block-type demolding mechanism, which includes a movable mold 11 and a core 110 formed in the middle of the movable mold 11.
  • the core 110 is used to form a disposable rectangular lunch box ,
  • the lunch box is a thin-walled deep cavity plastic part
  • the core 110 is an integrated structure, and a straight side blow hole is opened inside it.
  • the side blow hole penetrates the entire core 110 transversely and communicates with the corresponding air flow channel.
  • the air flow channel is formed Inside the core 110, and its axial direction is consistent with the height direction of the core 110.
  • the height direction of the core 110 refers to the moving direction of the core 110 when the mold is closed, and the length direction of the side blow hole and the air flow channel
  • the axial direction is vertical; an insert 30 is embedded in the side blow hole, the insert 30 has a first end surface 31, a second end surface and an annular side wall 32, the annular side wall 32 is adapted to the inner wall of the side blow hole,
  • the installation gap between the insert 30 and the side blowing hole forms an air gap.
  • the outer edges of the first end face 31 and the second end face opposite to each other cooperate with the two ports of the side blowing hole to form two annular blowing ports.
  • the annular blowing ports are all distributed on the side molding surface of the core 110, and the first end surface 31 and the second end surface are matched with the side molding surface of the core 110 to form an auxiliary molding surface, and the side blow holes are connected through the insert 30 With cooperation, two annular blowing ports can be formed on the side molding surface of the core 110.
  • the insert 30 and the core 110 are made of the same material to ensure that they have the same coefficient of thermal expansion and contraction, which improves the insert
  • the degree of fit between 30 and core 110 compressed air blows to the side wall of the thin-walled deep cavity plastic part through the annular blowing port, so that an air layer is formed between the plastic part and the core 110, which facilitates the demolding of the plastic part and can Adjust the pressure of the compressed gas according to the shape and wall thickness of the injection molded product to avoid excessive pressure damaging the plastic parts
  • the core 110 is an integrated structure that is easy to process and has high strength, which can effectively avoid the problems of water leakage in the cooling water channel and cracking of the movable mold 11, extending The service life of the mold, the stable structure of the core 110 and the smooth surface can effectively improve the appearance quality of injection molded products and avoid excessive injection impressions.
  • the top of the core 110 is also provided with two gas top holes 111, and the two gas top holes 111 are distributed diagonally.
  • a jet valve is installed in the top hole 111.
  • the model of the jet valve is C-AJVSS6-12, and its outer diameter is 6mm. It is made of stainless steel, including a body, a piston rod, a spring, and an elastic split pin.
  • the holes 111 are respectively connected to the corresponding air flow channels.
  • the diagonal arrangement of the gas cap holes 111 can improve the effectiveness of blowing, so that the effective area of the compressed gas blown by the gas cap holes 111 is larger, and the demolding effect is improved.
  • the two first air flow channels 112 communicated with the hole 111 and the second air flow channel 115 communicated with the side blowing holes are opened at intervals inside the core 110 and communicated with the main air passage, which communicates with an external compressed gas source.
  • the combination of the blowing hole and the air top hole 111 can generate a uniform air layer between the lunch box and the core 110, facilitate the demolding of the lunch box, and reduce the defective rate caused by demolding.
  • the first air flow channel 112 and the second air flow The channels 115 are all opened along the height direction of the core 110, and the distribution positions are reasonable, which can provide sufficient opening space for the cooling water channel, and facilitate mold manufacturing and processing.
  • the lower side of the side blow hole is provided with a mounting hole for installing fasteners, and the axial direction of the mounting hole is perpendicular to the length of the side blow hole In the direction, the mounting hole 116 is coaxially provided with a mounting hole 116 below the mounting hole. The upper end of the mounting hole 116 communicates with the mounting hole.
  • the lower end of the mounting hole 116 extends downward and penetrates the lower end surface of the movable mold 11, through the setting of the mounting hole 116,
  • the assembly of the fasteners can be completed without damaging the integral structure of the core 110;
  • the aperture of the assembly hole 116 is larger than the aperture of the mounting hole, the connecting position forms a stepped edge, and the wall of the mounting hole is provided with internal threads
  • the fastener is an inner hexagonal fastening bolt 20, the fastening bolt 20 is installed in the mounting hole, and its upper end is against the side wall of the insert 30, and the inner hexagonal bolt is used as the fastener, which is convenient for assembly ;
  • the cross section of the insert 30 is rectangular, the annular side wall 32 is enclosed by four side walls of a planar structure, the upper end surface of the fastening bolt 20 acts on the lower side wall, and the side wall of the planar structure can Provide a reliable force position for the fastening bolt 20, ensure the fastening effect of the fastening bolt 20, and the insert 30 of
  • the four end corners of the side blow hole are also chamfered to match the end corners of the insert 30. Compared with the right angle, it can effectively avoid the thermal expansion of the insert 30.
  • the right angle end angle directly acts on the inner wall of the side blow hole, causing stress Concentration can cause damage to the mold and cause the mold to crack. At the same time, the insert 30 is also easily damaged, which effectively improves the strength and service life of the insert 30 and the mold.
  • a plurality of vertical cooling water channels 113 are formed at intervals within the core 110.
  • the axial direction of the vertical cooling water channels 113 is consistent with the axial direction of the air flow channel, and they are all opened along the height direction of the core 110.
  • the lower end surface of the movable mold 11 A horizontal cooling water channel 114 is provided.
  • the vertical cooling water channel 113 extends downward and communicates with the horizontal cooling water channel 114.
  • a water barrier is installed in each cooling water channel along its axial direction.
  • the water barrier divides the cooling water channel into The water channel and the water outlet channel, the vertical cooling water channel 113 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 113 can avoid the air flow channel, so that there is enough open space inside the core 110 Guarantee the number of cooling water channels, ensure the cooling effect, and improve the quality of injection products.
  • the horizontal cooling water channel 114 opened on the lower end of the movable mold 11 can further improve the cooling effect, and can connect multiple vertical cooling water channels 113 to form a continuous water channel.
  • the reserved distance between the upper end surface of the vertical cooling water channel 113 and the upper end surface of the core 110 should be greater than 9 mm.
  • the reserved distance is 10 mm; because of the vertical cooling water channel 113 It needs to be cleaned with strong acid regularly.
  • a safe distance is set between the vertical cooling water channel 113 and between the vertical cooling water channel 113 and the air flow channel. The safe distance is greater than 6mm.
  • the reserved distance and the safe distance are set at While ensuring the cooling effect of the cooling water channel, the structural strength of the core 110 is also ensured, thereby effectively solving the problems of water leakage in the cooling water channel and cracking of the movable mold 11 and extending the service life of the mold.
  • the core 110 is an integrated structure. After the core 110 is formed, the core 110 is provided with side blow holes, air top holes 111, air flow channels, and vertical cooling water channels 113 according to the size. , Horizontal cooling channel 114, mounting holes, mounting holes 116, then insert the insert 30 into the side blow hole, and install the fastening bolt 20 into the mounting hole from the lower end of the mounting hole 116 to fix the insert 30, Then the air jet valve is embedded in the air top hole 111 to complete the processing and assembly of the insert-type demolding mechanism.
  • the processing technology is simple; the core 110 is an integrated structure, which can ensure its dimensional accuracy and surface finish, and high strength , Can effectively solve the problem of water leakage in the cooling water channel and cracking of the movable mold 11, and extend the service life of the mold; the structure design of the insert 30 is reasonable, and the setting of the arc chamfer 33 can effectively avoid stress concentration and extend the use of the insert 30 and the mold Life, and can ensure smooth and uniform air output in a high temperature environment, thereby ensuring the demolding effect and product quality; the distribution of air flow channels and cooling water channels is reasonable and effective, which can ensure the demolding effect and cooling effect while ensuring the structural strength of the core 110, thereby Improve the quality of injection molded products and extend the service life of the mold.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

一种镶块式脱模机构，包括成型于动模（11）的型芯（110），型芯（110）为一体式结构，且其内部开设一直道侧吹孔，侧吹孔横向贯穿整个型芯（110），并与相应的气流通道连通，侧吹孔中嵌装有镶块（30），镶块（30）的环形侧壁与侧吹孔的内壁相适应，镶块（30）与侧吹孔之间的安装间隙形成过气间隙，镶块（30）相对设置第一端面及第二端面的外缘分别与侧吹的两个端口配合形成两个环形吹气端口，第一端面及第二端面均与型芯（110）的侧部成型面相匹配形成辅助成型面。该镶块式脱模机构能够有效解决薄壁深腔型塑件脱模困难，品质无法保证的问题，且模具加工难度小，成本低，使用寿命长。

Description

一种镶块式脱模机构 技术领域
本发明属于注塑模具技术领域，特别涉及一镶块式脱模机构。
背景技术
注塑模具广泛应用于塑料制品的生产制造，塑件冷却成型后需要在脱模结构的作用下进行脱模，现多采用的脱模机构为推板、顶杆，对于薄壁深腔型塑件，壁薄易受损，且注塑制品在型芯上的吸附力大，脱模困难，若采用以上脱模机构进行脱模不仅易损坏塑件，且为了能够把塑件完全顶出型芯，一般要求模脚的高度大于制品的深度，以满足顶出行程的需要，故模具耗钢量及加工成本增加，开模、闭模需要的工作行程变长，薄壁制品的注塑压力大，因此需要大吨位锁模力的注塑机来配套注塑，导致薄壁深腔制品的注塑工艺能耗大、效率低、次品率高；为解决以上技术问题，针对薄壁塑件现多采用吹气脱模的方式，但是为方便气流通道及冷却水道的开设，降低制模难度和制模成本，模芯多采用分体式结构，导致模具配合精度和强度降低，冷却水道漏水，从而影响模具使用寿命和产品品质。
发明内容
本发明的目的是针对现有的薄壁深腔型塑件脱模困难，品质无法保证，且其成型模具加工难度大，成本高，使用寿命短的问题，提供一种镶块式脱模机构。
本发明的目的可通过下列技术方案来实现：
一种镶块式脱模机构，包括成型于动模的型芯，其特征在于，所述型芯为一体式结构，且其内部开设一直道侧吹孔，侧吹孔横向贯穿整个型芯，并与相应的气流通道连通，所述气流通道成型于型芯内部；侧吹孔中嵌装有镶块，所述镶块具有第一端面、第二端面及环形侧壁，所述环形侧壁与 侧吹孔的内壁相适应，镶块与侧吹孔之间的安装间隙形成过气间隙，相对设置的第一端面及第二端面的外缘分别与侧吹孔的两个端口配合形成两个环形吹气端口，两个环形吹气端口均分布于型芯的侧部成型面，所述第一端面及第二端面均与型芯的侧部成型面相匹配形成辅助成型面。通过一块镶块与一个侧吹孔配合，即能够在型芯的侧部成型面成型两个环形吹气端口，降低了模具的加工难度和制造成本；压缩气体通过环形吹气端口向薄壁深腔型塑件的侧壁进行吹气，使塑件与型芯之间形成空气层，便于塑件脱模，且可根据注塑制品的形状、壁厚调节压缩气体的气压，避免气压过大损坏塑件；型芯为一体式结构可有效避免冷却水道漏水和动模开裂的问题，延长模具使用寿命，并能够保证型芯的结构稳固性，提高注塑制品的外观品质，避免产生过多的注塑印痕。
作为优选，所述侧吹孔的下侧开设有用于安装紧固件的安装孔，安装孔的轴向垂直于侧吹孔的长度方向，所述安装孔的下方同轴设置有装配孔，装配孔的上端与安装孔连通，装配孔的下端向下延伸并贯穿动模的下端面。紧固件能够进一步提高镶块的安装稳固性，避免其在压缩气体的作用下松脱位移，且通过装配孔的设置，能够在不破坏型芯一体结构的前提下，完成紧固件的装配。
作为优选，所述装配孔的孔径大于安装孔的孔径，其连接位形成一阶梯沿，安装孔的孔壁开设有内螺纹，所述紧固件为一内六角紧固螺栓，紧固螺栓安装于安装孔中，其上端面抵靠于镶块的侧壁。以上设置，方便装配。
作为优选，所述镶块的横截面为矩形，其环形侧壁由四个平面结构的侧壁围合而成。平面结构的侧壁能够为紧固螺栓提供可靠的着力位，保证紧固螺栓的紧固效果，同时可在镶块与侧吹孔的配合位提供不同方向的相互作用力，提高镶块的安装稳固性。
作为优选，所述镶块的四个端角均为弧形倒角，侧吹孔的四个端角也为与镶块端角配合的倒角。镶块及侧吹孔的端角设置为弧形倒角相对于直角可有效避免镶块受热膨胀时，直角端角直接作用于侧吹孔的内壁，造成 应力集中，对模具造成伤害，导致模具开裂，同时也避免镶块受损，从而有效提高了镶块和模具的强度和使用寿命。
作为优选，所述型芯的顶部至少开设有一个气顶孔，气顶孔中安装有喷气阀，所述气顶孔与相应的气流通道连通。对于具有顶壁的薄壁深腔注塑制品，气顶孔的设置能对顶壁进行吹气，利于注塑制品脱模。
作为优选，所述气顶孔具有两个，并呈对角分布于型芯的顶部。气顶孔呈对角设置能够提高吹气的有效性，使气顶孔吹出的压缩气体有效作用面积更大，提高脱模效果。
作为优选，所述气流通道间隔成型于型芯内部，型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，均沿型芯的高度方向开设。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，且冷却水道能够有效避开气流通道，避免气流通道和冷却水道相互干扰，使型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，提高塑件品质。
作为优选，动模的下端面开设有水平冷却水道，所述竖直冷却水道向下延伸与水平冷却水道连通。以上设置能够进一步提高冷却效果，且能将多个竖直冷却水道连通成一个贯通水道，提高冷却效果，且方便与外部水道连通。
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，并保证型芯的结构强度。
与现有技术相比，本发明具有以下有益效果，通过镶块与侧吹孔的配合能够有效提高薄壁深腔型塑件的脱模效果；镶块的安装拆卸方便，不破坏型芯的整体结构；镶块的结构设计合理，通过弧形倒角的设置能够有效避免应力集中，延长镶块及模具的使用寿命，且能够在高温环境下保证出气顺畅均匀，从而保证脱模效果和产品品质；型芯为一体式结构，加工制造方便，气流通道与冷却水道分布合理有效，能够在保证型芯结构强度的 同时保证脱模效果和冷却效果，从而提高注塑制品品质，延长模具使用寿命。
附图说明
图1为本发明结构示意图；
图2为本发明内部结构示意图；
图3为本发明中镶块结构示意图；
图4为本发明中动模底部结构示意图；
图中，动模11；型芯110；气顶孔111；第一气流通道112；竖直冷却水道113；水平冷却水道114；第二气流通道115；装配孔116；第二气流通道115；镶块30；第一端面31；环形侧壁32；弧形倒角33。
具体实施方式
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。
参见图1-4，本实施例公开一种镶块式脱模机构，其包括动模11及成型于动模11中部的型芯110，本实施例中型芯110用于成型一次性矩形餐盒，餐盒为薄壁深腔类塑件，型芯110为一体式结构，其内部开设一直道侧吹孔，侧吹孔横向贯穿整个型芯110，并与相应的气流通道连通，所述气流通道成型于型芯110内部，且其轴向与型芯110的高度方向一致，本实施例中型芯110的高度方向指模具合模时型芯110的移动方向，侧吹孔的长度方向与气流通道的轴向垂直；侧吹孔中嵌装有镶块30，所述镶块30具有第一端面31、第二端面及环形侧壁32，所述环形侧壁32与侧吹孔的内壁相适应，镶块30与侧吹孔之间的安装间隙形成过气间隙，相对设置第一端面31及第二端面的外缘分别与侧吹孔的两个端口配合形成两个环形吹气端口，两个环形吹气端口均分布于型芯110的侧部成型面，所述第一端面31及第二端面均与型芯110的侧部成型面相匹配形成辅助成型面，通过镶块30与侧吹孔配合，能够在型芯110的侧部成型面成型两个环形吹气端口，本实施例中镶块30与型芯110的材质一样，以保证它们有一致的热 胀冷缩系数，提高镶块30与型芯110的配合度；压缩气体通过环形吹气端口向薄壁深腔型塑件的侧壁进行吹气，使塑件与型芯110之间形成空气层，便于塑件脱模，且可根据注塑制品的形状、壁厚调节压缩气体的气压，避免气压过大损坏塑件；型芯110为一体式结构加工方便，强度高，可有效避免冷却水道漏水和动模11开裂的问题，延长模具使用寿命，且型芯110的结构稳固，表面光洁，能够有效提高注塑制品的外观品质，避免产生过多的注塑印痕。
对于具有顶壁的塑件，为进一步提高脱模效果，利于餐盒脱模，所述型芯110的顶部还开设有两个气顶孔111，两个气顶孔111呈对角分布，气顶孔111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111分别与相应的气流通道连通，气顶孔111呈对角设置能够提高吹气的有效性，使气顶孔111吹出的压缩气体有效作用面积更大，提高脱模效果，分别与气顶孔111连通的两个第一气流通道112和与侧吹孔连通的第二气流通道115间隔开设于型芯110内部，并与主气道连通，主气道与外部的压缩气体源连通，侧吹孔与气顶孔111配合能够使餐盒与型芯110之间产生均匀的空气层，便于餐盒脱模，降低因脱模而造成的次品率，第一气流通道112和第二气流通道115均沿型芯110的高度方向开设，且分布位置合理，能够为冷却水道提供足够的开设空间，便于模具制造加工。
为提高镶块30的安装稳固性，避免其在压缩气体的作用下松脱位移，侧吹孔的下侧开设有用于安装紧固件的安装孔，安装孔的轴向垂直于侧吹孔的长度方向，所述安装孔的下方同轴设置有装配孔116，装配孔116的上端与安装孔连通，装配孔116的下端向下延伸并贯穿动模11的下端面，通过装配孔116的设置，能够在不破坏型芯110一体结构的前提下，完成紧固件的装配；所述装配孔116的孔径大于安装孔的孔径，其连接位形成一阶梯沿，安装孔的孔壁开设有内螺纹，所述紧固件为一内六角紧固螺栓20，紧固螺栓20安装于安装孔中，且其上端面抵靠于镶块30的侧壁，采 用内六角螺栓作为紧固件，装配方便；本实施例中镶块30的横截面为矩形，环形侧壁32由四个平面结构的侧壁围合而成，紧固螺栓20的上端面作用于下侧壁，平面结构的侧壁能够为紧固螺栓20提供可靠的着力位，保证紧固螺栓20的紧固效果，且此结构的镶块30加工方便；为避免应力集中，镶块30的四个端角均为弧形倒角33，侧吹孔的四个端角也为与镶块30端角配合的倒角，相对于直角可有效避免镶块30受热膨胀时，直角端角直接作用于侧吹孔的内壁，造成应力集中，对模具造成伤害，导致模具开裂，同时镶块30也易受损，有效提高了镶块30和模具的强度和使用寿命。
型芯110内部间隔成型有多个竖直冷却水道113，所述竖直冷却水道113的轴向与气流通道的轴向一致，均沿型芯110的高度方向开设，动模11的下端面上开设有水平冷却水道114，所述竖直冷却水道113向下延伸并与水平冷却水道114连通，每个冷却水道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113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113能够避开气流通道，使型芯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下端面开设的水平冷却水道114能够进一步提高冷却效果，且能够使多个竖直冷却水道113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；由于薄壁深腔型塑件的注塑压力大，型芯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，要兼顾型芯110的结构强度，因此竖直冷却水道113的上端面与型芯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10mm；由于竖直冷却水道113需要定期用强酸清洗，为避免穿孔，竖直冷却水道113之间及竖直冷却水道113与气流通道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，还保证了型芯110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。
本发明公开的镶块式脱模机构，型芯110为一体式结构，型芯110成型后，在型芯110上按尺寸开设侧吹孔、气顶孔111、气流通道、竖直冷 却水道113、水平冷却水道114、安装孔、装配孔116，然后将镶块30嵌装于侧吹孔中，并由装配孔116的下端将紧固螺栓20安装至安装孔中对镶块30进行固定，再将喷气阀嵌装于气顶孔111中，即完成了镶块式脱模机构的加工装配，加工工艺简单；型芯110为一体式结构，可保证其尺寸精度和表面光洁度，且强度高，能够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；镶块30的结构设计合理，通过弧形倒角33的设置能够有效避免应力集中，延长镶块30及模具的使用寿命，且能够在高温环境下保证出气顺畅均匀，从而保证脱模效果和产品品质；气流通道与冷却水道分布合理有效，能够在保证型芯110结构强度的同时保证脱模效果和冷却效果，从而提高注塑制品品质，延长模具使用寿命。
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……”。术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。
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。

Claims (10)

  1. 一种镶块式脱模机构，包括成型于动模(11)的型芯(110)，其特征在于，所述型芯(110)为一体式结构，且其内部开设一直道侧吹孔，侧吹孔横向贯穿整个型芯(110)，并与相应的气流通道连通，所述气流通道成型于型芯(110)内部；侧吹孔中嵌装有镶块(30)，所述镶块(30)具有第一端面(31)、第二端面及环形侧壁(32)，所述环形侧壁(32)与侧吹孔的内壁相适应，镶块(30)与侧吹孔之间的安装间隙形成过气间隙，相对设置的第一端面(31)及第二端面的外缘分别与侧吹孔的两个端口配合形成两个环形吹气端口，两个环形吹气端口均分布于型芯(110)的侧部成型面，所述第一端面(31)及第二端面均与型芯(110)的侧部成型面相匹配形成辅助成型面。
  2. 根据权利要求1所述的一种镶块式脱模机构，其特征在于，所述侧吹孔的下侧开设有用于安装紧固件的安装孔，安装孔的轴向垂直于侧吹孔的长度方向，所述安装孔的下方同轴设置有装配孔(116)，装配孔(116)的上端与安装孔连通，装配孔(116)的下端向下延伸并贯穿动模(11)的下端面。
  3. 根据权利要求2所述的一种镶块式脱模机构，其特征在于，所述装配孔(116)的孔径大于安装孔的孔径，其连接位形成一阶梯沿，安装孔的孔壁开设有内螺纹，所述紧固件为一内六角紧固螺栓(20)，紧固螺栓(20)安装于安装孔中，且其上端面抵靠于镶块(30)的侧壁。
  4. 根据权利要求1-3任一项所述的一种镶块式脱模机构，其特征在于，所述镶块(30的横截面为矩形，其环形侧壁(32)由四个平面结构的侧壁围合而成。
  5. 根据权利要求4所述的一种镶块式脱模机构，其特征在于，述镶块(30)的四个端角均为弧形倒角(33)，侧吹孔的四个端角也为与镶块(30)端角配合的倒角。
  6. 根据权利要求1所述的一种镶块式脱模机构，其特征在于，所述型芯(110)的顶部至少开设有一个气顶孔(111)，气顶孔(111)中安装有喷气阀，所述气顶孔(111)与相应的气流通道连通。
  7. 根据权利要求6所述的一种镶块式脱模机构，其特征在于，所述气顶孔(111)具有两个，并呈对角分布于型芯(110)的顶部。
  8. 根据权利要求1或2或3或6或7所述的一种镶块式脱模机构，其特征在于，所述所述气流通道间隔成型于型芯(110)内部，型芯(110)内部间隔成型有多个竖直冷却水道(113)，所述竖直冷却水道(113)的轴向与气流通道的轴向一致，均沿型芯(110)的高度方向开设。
  9. 根据权利要求8所述的一种镶块式脱模机构，其特征在于，动模(11)的下端面开设有水平冷却水道(114)，所述竖直冷却水道(113)向下延伸与水平冷却水道(114)连通。
  10. 根据权利要求8所述的一种镶块式脱模机构，其特征在于，所述竖直冷却水道(113)之间及竖直冷却水道(113)与气流通道之间设定有安全间距，所述安全间距大于6mm。
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