WO2020164381A1 - Heat conduction structure for hot runner injection molding - Google Patents
Heat conduction structure for hot runner injection molding Download PDFInfo
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- WO2020164381A1 WO2020164381A1 PCT/CN2020/073520 CN2020073520W WO2020164381A1 WO 2020164381 A1 WO2020164381 A1 WO 2020164381A1 CN 2020073520 W CN2020073520 W CN 2020073520W WO 2020164381 A1 WO2020164381 A1 WO 2020164381A1
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- Prior art keywords
- feed nozzle
- insulation sleeve
- feed
- channel
- heat conduction
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 18
- 238000009413 insulation Methods 0.000 claims abstract description 49
- 230000007704 transition Effects 0.000 claims abstract description 46
- 238000009434 installation Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims description 40
- 239000002184 metal Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 10
- 239000000806 elastomer Substances 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 239000012768 molten material Substances 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
Definitions
- the invention relates to the technical field of hot runner molds, in particular to a heat conduction structure for hot runner injection molding.
- the hot runner mold will produce thermal expansion due to the material and mold temperature during the production process, especially after the thermal expansion and deformation of the feed nozzle, the corresponding part of the feed nozzle will have radial clearance and axial clearance, which affects the accuracy of the fit.
- the discharge port of the material nozzle will be offset, which will affect the accuracy of the feed, and the material will leak. What is more, it will cause unqualified injection products and damage to the mold.
- the present invention provides a heat conduction structure for hot runner injection molding.
- a heat conduction structure for hot runner injection molding including a hot runner body, a feed nozzle, an elastic heat insulation sleeve and a cavity body; the heating runner body is arranged at In the cavity body, the heating channel body is cylindrical, and the heating channel body is provided with a main transition channel and more than one branch transition channel that are connected to each other.
- the main transition channel is along the heating channel body.
- the central axis is arranged, the branch transition flow passage is arranged along the radial direction of the heating forehearth body; the side surface of the heating passage body is provided with more than one feed nozzle, and the feed nozzle and the branch transition flow passage correspond one-to-one Set, the tail of the feed nozzle is in the shape of a disc, and the end surface of the tail is closely attached to the side of the heating channel body.
- the head and middle of the feed nozzle extend into the cavity body, and the middle of the feed nozzle is cylindrical
- the outer jacket has an elastic heat insulation sleeve, the inner side of the elastic heat insulation sleeve is matched with the side surface of the middle part of the feed nozzle, and the tail end surface of the elastic heat insulation sleeve is matched with the head end surface of the tail part of the feed nozzle;
- the cavity body There are more than one installation grooves, the installation groove and the elastic heat insulation sleeve in the middle of the feed nozzle are arranged one by one, the groove wall of the installation groove matches the outer surface of the elastic heat insulation sleeve, and the groove bottom surface of the installation groove matches the elastic The head and end surfaces of the heat insulation sleeve are matched.
- one end of the main transition flow channel is connected to one end surface of the heating material passage body, one end of the branch transition flow channel is communicated with the other end of the main transition flow channel, and the other end of the branch transition flow channel is connected to the heating On the side of the material channel body.
- branch transition flow passages are evenly distributed along the circumference of the heating forehearth body.
- the heating forehearth body is in the shape of a regular prism, and the number of the branch transition channels and the side surfaces of the hot forehearth body are the same and arranged in one-to-one correspondence.
- the central axis of the feed nozzle is coaxially arranged with the central axis of the corresponding branch transition flow channel, the head of the feed nozzle is tapered, and the flow channel of the feed nozzle leads from the tail of the feed nozzle to At the head, the tail of the flow channel of the feed nozzle communicates with the corresponding branch transition channel, and the head port of the flow channel of the feed nozzle is the discharge port of the feed nozzle.
- the head of the flow channel of the feed nozzle is arranged off-axis; the cavity body is provided with more than one storage bin, and the storage bin and the head of the feed nozzle are arranged in one-to-one correspondence , And the storage bin is in communication with the discharge port of the corresponding feed nozzle, and the storage bin is provided with a feed port communicating with the product molding cavity of the cavity body, and the feed port is connected to the feed nozzle
- the cone tip of the head corresponds with the feeding gap between the two.
- the elastic heat insulation sleeve is made of non-metallic materials.
- the elastic heat insulation sleeve includes a metal framework and an elastic body, the metal framework is in the shape of a loop sleeve, and the metal framework wraps the elastic body.
- the elastic heat insulation sleeve includes an elastic body and two metal skeletons, the elastic body is in the shape of a ring sleeve, two end faces of the elastic body are respectively provided with an annular groove, and an annular groove is provided in the annular groove. And matching metal framework.
- the elastic heat insulation sleeve includes a metal sleeve and an elastomer sleeve, and the elastomer sleeve is sleeved on the outer peripheral side of the metal sleeve.
- the present invention has the beneficial effects: by heating the side surface of the forehearth body and the end surface of the tail of the feed nozzle closely to form a heat conduction plane, and conduct plane heat conduction; when the feed nozzle generates high temperature passively, the diameter is generated.
- the elastic heat insulation sleeve will produce elastic deformation to eliminate the radial and axial thermal expansion gap, ensure the matching accuracy at the feed nozzle, ensure that the feed is accurate and leak-free, and improve the mold The reliability guarantees the quality of injection products.
- Figure 1 is a cross-sectional view of an embodiment of the present invention.
- Fig. 2 is a partial enlarged view of A in Fig. 1.
- Fig. 3 is a top view of a cavity body removed according to an embodiment of the present invention.
- 4 to 7 are schematic diagrams of the structure of different elastic heat insulation sleeves in the present invention.
- a heat conduction structure of hot runner injection molding includes a heating channel body 1, a feed nozzle 2, an elastic insulation sleeve 3 and a cavity body 4.
- the heating sprue body 1 is arranged in the cavity body 4, and the heating sprue body 1 is used to distribute the molten material entering the main runner of the hot nozzle to each feed nozzle 2, and the heating sprue body 1 is in the shape of a right prism.
- the heating channel body 1 is provided with a main transition channel 101 and more than one branch transition channel 102.
- the main transition channel 101 is used to connect the hot nozzle main channel, and the main transition channel 101 runs along the heating channel body 1.
- the central axis of the main transition channel 101 is set, and one end of the main transition flow channel 101 is connected to one end surface of the heating channel body 1.
- the transition flow channel 102 is used to connect the flow channel of the feed nozzle 2, and the transition flow channel 102 is heated along
- the runner body 1 is arranged radially, one end of the branch transition runner 102 is connected to the other end of the main transition runner 101, and the other end of the branch transition runner 102 is connected to the side surface of the heating runner body 1.
- two or more sub-transition runners 102 can be evenly distributed along the circumferential direction of the heating forehearth body 1, and further, the number of the sub-transition runners 102 and the side surfaces of the hot runner body 1 are the same and arranged in one-to-one correspondence.
- More than one feed nozzle 2 is provided on the side surface of the heating feed channel body 1, and the feed nozzle 2 and the branch transition channel 102 are arranged in one-to-one correspondence.
- the central axis of the feed nozzle 2 corresponds to the corresponding branch transition channel.
- the central axis of 102 is arranged coaxially, the tail of the feed nozzle 2 is in the shape of a disk, and the tail end surface of the tail is closely attached to the side of the heating channel body 1, and the head and middle of the feed nozzle 2 extend into the cavity body 4 Inside, the head of the feed nozzle 2 is cone-shaped, the middle of the feed nozzle 2 is cylindrical, and an elastic heat insulation sleeve 3 is sheathed.
- the inner side surface 301 of the elastic heat insulation sleeve and the side surface of the middle part of the feed nozzle 2 In cooperation, the tail end surface 302 of the elastic heat insulation sleeve is matched with the head end surface of the tail of the feed nozzle 2.
- the flow path of the feed nozzle 2 leads from the tail to the head of the feed nozzle 2, and the tail of the flow path of the feed nozzle 2 communicates with the other end of the corresponding branch transition flow path 102.
- the head of the flow channel is set off-axis and the head port of the flow channel is used as the discharge port of the nozzle.
- the cavity body 4 is provided with more than one storage bin 401 and more than one installation groove.
- the storage bin 401 and the head of the feed nozzle 2 are arranged in one-to-one correspondence.
- the installation groove and the feed nozzle 2 The elastic heat insulation sleeve 3 in the middle part is arranged in one-to-one correspondence; the storage bin 401 is connected with the discharge port of the corresponding feed nozzle 2, and the storage bin 401 is provided with the product molding of the cavity body 4
- the cavity is connected with a feed port 402, the feed port 402 corresponds to the cone tip of the head of the feed nozzle 2 and there is a feed gap between the two, and the molten material enters the cavity from the feed gap
- the product molding cavity of the body 4; the groove wall of the installation groove is matched with the outer side surface 303 of the elastic heat insulation sleeve, and the groove bottom surface of the installation groove is matched with the head end surface 304 of the elastic heat insulation sleeve.
- this embodiment shows six molded products 5, the heating channel body 1 is in the shape of a regular hexagonal prism, the feed nozzle 2, the elastic heat insulation sleeve 3, and the transition flow channel 102 of the heating channel body 1 (in the figure The number of (not shown) is six.
- Hot runner injection molding process the molten material is distributed to each feed nozzle 2 through the main transition channel 101 and the branch transition channel 102 of the heating channel body 1, and then enters the storage bin through the flow channel of the feed nozzle 2 401, finally enter the product molding cavity of the cavity body 4 from the feed gap between the feed port 402 of the storage bin 401 and the cone tip of the head of the feed nozzle 2, and the molded product 5 is injection molded.
- the function of the heat conduction structure is reflected in: the side surface of the heating channel body 1 closely adheres to the tail end surface 201 of the tail of the feed nozzle to form a heat conduction plane for planar heat conduction; the feed nozzle 2 will be affected by materials and molds
- the temperature passively generates high temperature, which produces thermal expansion and deformation in the radial direction and the axial direction, and then between the inner side surface 301 of the elastic heat insulation sleeve and the side surface of the middle part of the feed nozzle 2, the tail end surface 302 of the elastic heat insulation sleeve and the feed nozzle 2
- the elastic heat insulation sleeve 3 will be elastically deformed to eliminate the radial and axial thermal expansion
- the elastic heat insulation sleeve 3 may be made of the non-metallic material shown in FIG. 4, or may be formed by a combination of the metal structure and the non-metal structure shown in FIGS. 5-7.
- the elastic heat insulation sleeve 3 includes a metal frame 305 and an elastic body 306, the metal frame 305 is in the shape of a ring sleeve, and the metal frame 305 wraps the elastic body 306.
- the elastic heat insulation sleeve 3 includes an elastic body 306 and two metal skeletons 305.
- the elastic body 306 is in the shape of a ring sleeve.
- the two end surfaces of the elastic body 306 are respectively provided with an annular groove concentrically.
- the elastic heat insulation sleeve 3 includes a metal sleeve 307 and an elastomer sleeve 308, and the elastomer sleeve 308 is sleeved on the outer peripheral side of the metal sleeve 307.
Abstract
Disclosed is a heat conduction structure for hot runner injection molding, comprising a hot feed channel body, a feed nozzle, an elastic insulation sleeve and a cavity body; wherein the hot feed channel body is disposed inside the cavity body, the hot feed channel body has a primary transition runner and a secondary transition runner configured thereon, the hot feed channel body has the feed nozzle corresponding to the secondary transition runner configured on a side face thereof, an end face of an end of the feed nozzle is tightly fitted against a side face of the hot feed channel body, forming a heat conduction surface that allows surface heat conduction; and wherein a head portion and a middle portion of the feed nozzle are positioned inside the cavity body, the middle portion of the feed nozzle is cylindrical in shape and sleeved with the elastic insulation sleeve, and an installation recess corresponding to the elastic insulation sleeve is configured on the cavity body. When the feed nozzle undergoes thermal expansion deformation in radial and axial directions, the elastic insulation sleeve deforms elastically to eliminate any gap resulting from the thermal expansion in radial and axial directions, which guarantees a precise fitting at the feed nozzle, ensures accurate feeding without leakage, increases reliability of a mold, and guarantees high quality of an injection molded product.
Description
本发明涉及热流道模具技术领域，特别涉及一种热流道注塑成型的热传导结构。The invention relates to the technical field of hot runner molds, in particular to a heat conduction structure for hot runner injection molding.
目前热流道模具在生产过程中会因物料、模温产生热膨胀，特别是进料嘴热膨胀变形后，进料嘴的对应处会产生径向间隙和轴向间隙，影响配合精度，进料嘴的料嘴出料口会偏移，影响进料准确性，物料会有泄漏，更有甚者会造成注塑产品不合格、模具损坏。At present, the hot runner mold will produce thermal expansion due to the material and mold temperature during the production process, especially after the thermal expansion and deformation of the feed nozzle, the corresponding part of the feed nozzle will have radial clearance and axial clearance, which affects the accuracy of the fit. The discharge port of the material nozzle will be offset, which will affect the accuracy of the feed, and the material will leak. What is more, it will cause unqualified injection products and damage to the mold.
发明内容Summary of the invention
本发明针对上述问题，提供一种热流道注塑成型的热传导结构。In view of the above problems, the present invention provides a heat conduction structure for hot runner injection molding.
本发明的目的可以通过下述技术方案来实现：一种热流道注塑成型的热传导结构，包括热料道本体、进料嘴、弹性隔热套和型腔本体；所述加热料道本体设置于型腔本体内，加热料道本体呈柱体状，加热料道本体上设有相连通的一个主过渡流道和一个以上的分过渡流道，所述主过渡流道沿加热料道本体的中心轴线设置，所述分过渡流道沿加热料道本体的径向设置；所述加热料道本体的侧面设有一个以上的进料嘴，所述进料嘴和分过渡流道一一对应设置，进料嘴的尾部呈盘体状且尾部的尾端面与加热料道本体的侧面紧密贴合，进料嘴的头部和中部伸入型腔本体内，进料嘴的中部呈圆柱状且外套有弹性隔热套，所述弹性隔热套的内侧面与进料嘴中部的侧面相配合，弹性隔热套的尾端面与进料嘴尾部的头端面相配合；所述型腔本体上设有一个以上的安装槽，所述安装槽和进料嘴中部的弹性隔热套一一对应设置，安装槽的槽壁与弹性隔热套的外侧面相配合，安装槽的槽底面与弹性隔热套的头端面相配合。The object of the present invention can be achieved by the following technical solutions: a heat conduction structure for hot runner injection molding, including a hot runner body, a feed nozzle, an elastic heat insulation sleeve and a cavity body; the heating runner body is arranged at In the cavity body, the heating channel body is cylindrical, and the heating channel body is provided with a main transition channel and more than one branch transition channel that are connected to each other. The main transition channel is along the heating channel body. The central axis is arranged, the branch transition flow passage is arranged along the radial direction of the heating forehearth body; the side surface of the heating passage body is provided with more than one feed nozzle, and the feed nozzle and the branch transition flow passage correspond one-to-one Set, the tail of the feed nozzle is in the shape of a disc, and the end surface of the tail is closely attached to the side of the heating channel body. The head and middle of the feed nozzle extend into the cavity body, and the middle of the feed nozzle is cylindrical And the outer jacket has an elastic heat insulation sleeve, the inner side of the elastic heat insulation sleeve is matched with the side surface of the middle part of the feed nozzle, and the tail end surface of the elastic heat insulation sleeve is matched with the head end surface of the tail part of the feed nozzle; the cavity body There are more than one installation grooves, the installation groove and the elastic heat insulation sleeve in the middle of the feed nozzle are arranged one by one, the groove wall of the installation groove matches the outer surface of the elastic heat insulation sleeve, and the groove bottom surface of the installation groove matches the elastic The head and end surfaces of the heat insulation sleeve are matched.
进一步地，所述主过渡流道的一端通至加热料道本体的一端面上，所述分 过渡流道的一端与主过渡流道的另一端连通，分过渡流道的另一端通至加热料道本体的侧面上。Further, one end of the main transition flow channel is connected to one end surface of the heating material passage body, one end of the branch transition flow channel is communicated with the other end of the main transition flow channel, and the other end of the branch transition flow channel is connected to the heating On the side of the material channel body.
更进一步地，两个以上的分过渡流道沿加热料道本体的周向均布设置。Furthermore, two or more branch transition flow passages are evenly distributed along the circumference of the heating forehearth body.
再进一步地，所述加热料道本体呈正棱柱状，所述分过渡流道和热料道本体的侧面的数量相同且一一对应设置。Still further, the heating forehearth body is in the shape of a regular prism, and the number of the branch transition channels and the side surfaces of the hot forehearth body are the same and arranged in one-to-one correspondence.
进一步地，所述进料嘴的中心轴线与对应的分过渡流道的中心轴线共轴线设置，进料嘴的头部呈锥尖状，进料嘴的流道从进料嘴的尾部通至头部，进料嘴的流道的尾部与对应的分过渡流道连通，进料嘴的流道的头部端口为料嘴出料口。Further, the central axis of the feed nozzle is coaxially arranged with the central axis of the corresponding branch transition flow channel, the head of the feed nozzle is tapered, and the flow channel of the feed nozzle leads from the tail of the feed nozzle to At the head, the tail of the flow channel of the feed nozzle communicates with the corresponding branch transition channel, and the head port of the flow channel of the feed nozzle is the discharge port of the feed nozzle.
更进一步地，所述进料嘴的流道的头部偏轴设置；所述型腔本体上设有一个以上的储料仓，所述储料仓和进料嘴的头部一一对应设置，并且储料仓与相对应的进料嘴的料嘴出料口连通，储料仓上设有与型腔本体的产品成型腔体连通的进料口，所述进料口与进料嘴头部的锥尖端相对应且两者之间设有进料间隙。Further, the head of the flow channel of the feed nozzle is arranged off-axis; the cavity body is provided with more than one storage bin, and the storage bin and the head of the feed nozzle are arranged in one-to-one correspondence , And the storage bin is in communication with the discharge port of the corresponding feed nozzle, and the storage bin is provided with a feed port communicating with the product molding cavity of the cavity body, and the feed port is connected to the feed nozzle The cone tip of the head corresponds with the feeding gap between the two.
进一步地，所述弹性隔热套采用非金属材料制成。或，所述弹性隔热套包括金属骨架和弹性体，所述金属骨架呈环套状，金属骨架外包裹弹性体。或，所述弹性隔热套包括弹性体和两个金属骨架，所述弹性体呈环套状，弹性体的两个端面上分别同心设有一环形槽，所述环形槽内设有一个环状且相配的金属骨架。或，所述弹性隔热套包括金属套和弹性体套，所述弹性体套套于金属套的外周侧。Further, the elastic heat insulation sleeve is made of non-metallic materials. Or, the elastic heat insulation sleeve includes a metal framework and an elastic body, the metal framework is in the shape of a loop sleeve, and the metal framework wraps the elastic body. Or, the elastic heat insulation sleeve includes an elastic body and two metal skeletons, the elastic body is in the shape of a ring sleeve, two end faces of the elastic body are respectively provided with an annular groove, and an annular groove is provided in the annular groove. And matching metal framework. Or, the elastic heat insulation sleeve includes a metal sleeve and an elastomer sleeve, and the elastomer sleeve is sleeved on the outer peripheral side of the metal sleeve.
与现有技术相比，本发明的有益效果：通过加热料道本体的侧面与进料嘴尾部的尾端面紧密贴合形成热传导平面，进行平面热传导；当进料嘴因被动产生高温，产生径向方向和轴向方向的热膨胀变形时，弹性隔热套会产生弹性变形来消除径向和轴向的热膨胀间隙，保证了进料嘴处的配合精度，确保进料准确无泄漏，提高了模具的可靠性，保证了注塑产品的质量。Compared with the prior art, the present invention has the beneficial effects: by heating the side surface of the forehearth body and the end surface of the tail of the feed nozzle closely to form a heat conduction plane, and conduct plane heat conduction; when the feed nozzle generates high temperature passively, the diameter is generated. When the thermal expansion and deformation in the direction and the axial direction, the elastic heat insulation sleeve will produce elastic deformation to eliminate the radial and axial thermal expansion gap, ensure the matching accuracy at the feed nozzle, ensure that the feed is accurate and leak-free, and improve the mold The reliability guarantees the quality of injection products.
图1为本发明一实施例的剖视图。Figure 1 is a cross-sectional view of an embodiment of the present invention.
图2为图1中A处的局部放大图。Fig. 2 is a partial enlarged view of A in Fig. 1.
图3为本发明一实施例的去除型腔本体的俯视图。Fig. 3 is a top view of a cavity body removed according to an embodiment of the present invention.
图4至图7为本发明中的不同的弹性隔热套的结构示意图。4 to 7 are schematic diagrams of the structure of different elastic heat insulation sleeves in the present invention.
图中部件标号如下：The part numbers in the figure are as follows:
1 加热料道本体1 Heating material channel body
101 主过渡流道101 Main transition channel
102 分过渡流道102 Sub-transition runner
2 进料嘴2 Feeding nozzle
201 进料嘴尾部的尾端面201 The end face of the tail of the feed nozzle
3 弹性隔热套3 Elastic heat insulation sleeve
301 弹性隔热套的内侧面301 The inner side of the elastic heat insulation sleeve
302 弹性隔热套的尾端面302 The end face of the elastic heat insulation sleeve
303 弹性隔热套的外侧面303 Outer side of elastic heat insulation sleeve
304 弹性隔热套的头端面304 The head end of the elastic heat insulation sleeve
305金属骨架305 metal frame
306 弹性体306 Elastomer
307 金属套307 Metal sleeve
308 弹性体套308 elastomer sleeve
4 型腔本体4 Cavity body
401 储料仓401 Storage Silo
402 进料口402 Feed inlet
5 成型产品。5 Molded products.
以下结合附图详细说明本发明的具体实施方式，使本领域的技术人员更清楚地理解如何实践本发明。尽管结合其优选的具体实施方案描述了本发明，但这些实施方案只是阐述，而不是限制本发明的范围。The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand how to practice the present invention. Although the present invention has been described in conjunction with its preferred specific embodiments, these embodiments are only illustrations, and do not limit the scope of the present invention.
参见图1和图2，一种热流道注塑成型的热传导结构，包括加热料道本体1、进料嘴2、弹性隔热套3和型腔本体4。1 and FIG. 2, a heat conduction structure of hot runner injection molding includes a heating channel body 1, a feed nozzle 2, an elastic insulation sleeve 3 and a cavity body 4.
所述加热料道本体1设置于型腔本体4内，加热料道本体1用于将进入热嘴主流道的熔融状态的物料分配给各个进料嘴2，加热料道本体1呈正棱柱状，加热料道本体1上设有一个主过渡流道101和一个以上的分过渡流道102，所述主过渡流道101用于衔接热嘴主流道，主过渡流道101沿加热料道本体1的中心轴线设置，并且主过渡流道101的一端通至加热料道本体1的一端面上，所述分过渡流道102用于衔接进料嘴2的流道，分过渡流道102沿加热料道本体1的径向设置，分过渡流道102的一端与主过渡流道101的另一端连通，分过渡流道102的另一端通至加热料道本体1的侧面上。其中，两个以上的分过渡流道102可沿加热料道本体1的周向均布设置，进一步地，分过渡流道102和热料道本体1的侧面的数量相同且一一对应设置。The heating sprue body 1 is arranged in the cavity body 4, and the heating sprue body 1 is used to distribute the molten material entering the main runner of the hot nozzle to each feed nozzle 2, and the heating sprue body 1 is in the shape of a right prism. The heating channel body 1 is provided with a main transition channel 101 and more than one branch transition channel 102. The main transition channel 101 is used to connect the hot nozzle main channel, and the main transition channel 101 runs along the heating channel body 1. The central axis of the main transition channel 101 is set, and one end of the main transition flow channel 101 is connected to one end surface of the heating channel body 1. The transition flow channel 102 is used to connect the flow channel of the feed nozzle 2, and the transition flow channel 102 is heated along The runner body 1 is arranged radially, one end of the branch transition runner 102 is connected to the other end of the main transition runner 101, and the other end of the branch transition runner 102 is connected to the side surface of the heating runner body 1. Wherein, two or more sub-transition runners 102 can be evenly distributed along the circumferential direction of the heating forehearth body 1, and further, the number of the sub-transition runners 102 and the side surfaces of the hot runner body 1 are the same and arranged in one-to-one correspondence.
所述加热料道本体1的侧面设有一个以上的进料嘴2，所述进料嘴2和分过渡流道102一一对应设置，进料嘴2的中心轴线与对应的分过渡流道102的中心轴线共轴线设置，进料嘴2的尾部呈盘体状且尾部的尾端面与加热料道本体1的侧面紧密贴合，进料嘴2的头部和中部伸入型腔本体4内，进料嘴2的头部呈锥尖状，进料嘴2的中部呈圆柱状且外套有弹性隔热套3，所述弹性隔热套的内侧面301与进料嘴2中部的侧面相配合，弹性隔热套的尾端面302与进料嘴2尾部的头端面相配合。其中，所述进料嘴2的流道从进料嘴2的尾部通至头部，进料嘴2的流道的尾部与对应的分过渡流道102的另一端连通，进料嘴2的流道的头部偏轴设置且流道的头部端口作为料嘴出料口。More than one feed nozzle 2 is provided on the side surface of the heating feed channel body 1, and the feed nozzle 2 and the branch transition channel 102 are arranged in one-to-one correspondence. The central axis of the feed nozzle 2 corresponds to the corresponding branch transition channel. The central axis of 102 is arranged coaxially, the tail of the feed nozzle 2 is in the shape of a disk, and the tail end surface of the tail is closely attached to the side of the heating channel body 1, and the head and middle of the feed nozzle 2 extend into the cavity body 4 Inside, the head of the feed nozzle 2 is cone-shaped, the middle of the feed nozzle 2 is cylindrical, and an elastic heat insulation sleeve 3 is sheathed. The inner side surface 301 of the elastic heat insulation sleeve and the side surface of the middle part of the feed nozzle 2 In cooperation, the tail end surface 302 of the elastic heat insulation sleeve is matched with the head end surface of the tail of the feed nozzle 2. Wherein, the flow path of the feed nozzle 2 leads from the tail to the head of the feed nozzle 2, and the tail of the flow path of the feed nozzle 2 communicates with the other end of the corresponding branch transition flow path 102. The head of the flow channel is set off-axis and the head port of the flow channel is used as the discharge port of the nozzle.
所述型腔本体4上设有一个以上的储料仓401和一个以上的安装槽，所述 储料仓401和进料嘴2的头部一一对应设置，所述安装槽与进料嘴2中部的弹性隔热套3一一对应设置；所述储料仓401与相对应的进料嘴2的料嘴出料口连通，储料仓401上设有与型腔本体4的产品成型腔体连通的进料口402，所述进料口402与进料嘴2头部的锥尖端相对应且两者之间设有进料间隙，熔融状态的物料从该进料间隙进入型腔本体4的产品成型腔体；所述安装槽的槽壁与弹性隔热套的外侧面303相配合，安装槽的槽底面与弹性隔热套的头端面304相配合。The cavity body 4 is provided with more than one storage bin 401 and more than one installation groove. The storage bin 401 and the head of the feed nozzle 2 are arranged in one-to-one correspondence. The installation groove and the feed nozzle 2 The elastic heat insulation sleeve 3 in the middle part is arranged in one-to-one correspondence; the storage bin 401 is connected with the discharge port of the corresponding feed nozzle 2, and the storage bin 401 is provided with the product molding of the cavity body 4 The cavity is connected with a feed port 402, the feed port 402 corresponds to the cone tip of the head of the feed nozzle 2 and there is a feed gap between the two, and the molten material enters the cavity from the feed gap The product molding cavity of the body 4; the groove wall of the installation groove is matched with the outer side surface 303 of the elastic heat insulation sleeve, and the groove bottom surface of the installation groove is matched with the head end surface 304 of the elastic heat insulation sleeve.
参见图3，本实施例示出了六个成型产品5，加热料道本体1呈正六棱柱状，进料嘴2、弹性隔热套3、加热料道本体1的分过渡流道102(图中未示出)的数量均为六个。Referring to Figure 3, this embodiment shows six molded products 5, the heating channel body 1 is in the shape of a regular hexagonal prism, the feed nozzle 2, the elastic heat insulation sleeve 3, and the transition flow channel 102 of the heating channel body 1 (in the figure The number of (not shown) is six.
热流道注塑成型的过程：熔融状态的物料经过加热料道本体1的主过渡流道101和分过渡流道102分配至各个进料嘴2，再经过进料嘴2的流道进入储料仓401，最后从储料仓401的进料口402与进料嘴2头部的锥尖端之间的进料间隙进入型腔本体4的产品成型腔体，注塑成型为成型产品5。在该注塑成型过程中，热传导结构的作用体现在：加热料道本体1的侧面与进料嘴尾部的尾端面201紧密贴合形成热传导平面，进行平面热传导；进料嘴2会因物料、模温被动产生高温，产生径向方向和轴向方向的热膨胀变形，进而弹性隔热套的内侧面301和进料嘴2中部的侧面之间、弹性隔热套的尾端面302和进料嘴2尾部的头端面之间会产生挤压，弹性隔热套的外侧面303和安装槽的槽壁之间、弹性隔热套的头端面304和安装槽的槽底面之间也会产生挤压，弹性隔热套3会产生弹性变形来消除径向和轴向的热膨胀间隙，保证进料嘴2处的配合精度，确保进料准确无泄漏。Hot runner injection molding process: the molten material is distributed to each feed nozzle 2 through the main transition channel 101 and the branch transition channel 102 of the heating channel body 1, and then enters the storage bin through the flow channel of the feed nozzle 2 401, finally enter the product molding cavity of the cavity body 4 from the feed gap between the feed port 402 of the storage bin 401 and the cone tip of the head of the feed nozzle 2, and the molded product 5 is injection molded. In the injection molding process, the function of the heat conduction structure is reflected in: the side surface of the heating channel body 1 closely adheres to the tail end surface 201 of the tail of the feed nozzle to form a heat conduction plane for planar heat conduction; the feed nozzle 2 will be affected by materials and molds The temperature passively generates high temperature, which produces thermal expansion and deformation in the radial direction and the axial direction, and then between the inner side surface 301 of the elastic heat insulation sleeve and the side surface of the middle part of the feed nozzle 2, the tail end surface 302 of the elastic heat insulation sleeve and the feed nozzle 2 There will be squeezing between the head end surfaces of the tail, and between the outer side surface 303 of the elastic heat insulation sleeve and the groove wall of the installation groove, and between the head end surface 304 of the elastic heat insulation sleeve and the bottom surface of the installation groove. The elastic heat insulation sleeve 3 will be elastically deformed to eliminate the radial and axial thermal expansion gaps, ensure the matching accuracy of the feed nozzle 2, and ensure that the feed is accurate and leak-free.
所述弹性隔热套3可以采用图4所示的非金属材料制成，还可以采用图5至图7所示的金属结构和非金属结构组合而成。参见图5，弹性隔热套3包括金属骨架305和弹性体306，所述金属骨架305呈环套状，金属骨架305外包 裹弹性体306。参见图6，弹性隔热套3包括弹性体306和两个金属骨架305，所述弹性体306呈环套状，弹性体306的两个端面上分别同心设有一环形槽，所述环形槽内置入有一个环状且相配合的金属骨架305。参见图7，弹性隔热套3包括金属套307和弹性体套308，所述弹性体套308套于金属套307的外周侧。The elastic heat insulation sleeve 3 may be made of the non-metallic material shown in FIG. 4, or may be formed by a combination of the metal structure and the non-metal structure shown in FIGS. 5-7. Referring to FIG. 5, the elastic heat insulation sleeve 3 includes a metal frame 305 and an elastic body 306, the metal frame 305 is in the shape of a ring sleeve, and the metal frame 305 wraps the elastic body 306. 6, the elastic heat insulation sleeve 3 includes an elastic body 306 and two metal skeletons 305. The elastic body 306 is in the shape of a ring sleeve. The two end surfaces of the elastic body 306 are respectively provided with an annular groove concentrically. A ring-shaped and matching metal frame 305 is inserted. Referring to FIG. 7, the elastic heat insulation sleeve 3 includes a metal sleeve 307 and an elastomer sleeve 308, and the elastomer sleeve 308 is sleeved on the outer peripheral side of the metal sleeve 307.
应当指出，对于经充分说明的本发明来说，还可具有多种变换及改型的实施方案，并不局限于上述实施方式的具体实施例。上述实施例仅仅作为本发明的说明，而不是对本发明的限制。总之，本发明的保护范围应包括那些对于本领域普通技术人员来说显而易见的变换或替代以及改型。It should be pointed out that for the fully explained present invention, there can also be various conversion and modified embodiments, which are not limited to the specific examples of the above-mentioned embodiments. The above-mentioned embodiments are merely illustrative of the present invention, rather than limiting the present invention. In short, the protection scope of the present invention should include those alterations or substitutions and modifications that are obvious to those of ordinary skill in the art.
Claims (10)
- 一种热流道注塑成型的热传导结构，其特征在于，包括加热料道本体、进料嘴、弹性隔热套和型腔本体；A heat conduction structure for hot runner injection molding, which is characterized in that it comprises a heating channel body, a feed nozzle, an elastic heat insulation sleeve and a cavity body;所述加热料道本体设置于型腔本体内，加热料道本体呈柱体状，加热料道本体上设有相连通的一个主过渡流道和一个以上的分过渡流道，所述主过渡流道沿加热料道本体的中心轴线设置，所述分过渡流道沿加热料道本体的径向设置；The heating material passage body is arranged in the cavity body, the heating material passage body is cylindrical, and the heating material passage body is provided with a main transition flow passage and more than one branch transition flow passages that are connected to each other. The runner is arranged along the central axis of the heating channel body, and the branch transition channel is arranged along the radial direction of the heating channel body;所述加热料道本体的侧面设有一个以上的进料嘴，所述进料嘴和分过渡流道一一对应设置，进料嘴的尾部呈盘体状且尾部的尾端面与加热料道本体的侧面紧密贴合，进料嘴的头部和中部伸入型腔本体内，进料嘴的中部呈圆柱状且外套有弹性隔热套，所述弹性隔热套的内侧面与进料嘴中部的侧面相配合，弹性隔热套的尾端面与进料嘴尾部的头端面相配合；There are more than one feed nozzles on the side of the heating feeder body, and the feed nozzles and the branch transition channels are arranged in one-to-one correspondence. The tail of the feed nozzle is in the shape of a disk and the tail end surface of the tail is connected to the heating feeder. The sides of the main body fit tightly, and the head and middle of the feed nozzle extend into the cavity body. The middle of the feed nozzle is cylindrical and is covered with an elastic heat insulation sleeve. The side faces of the middle part of the mouth are matched, and the end face of the elastic heat insulation sleeve is matched with the head end face of the tail part of the feed nozzle;所述型腔本体上设有一个以上的安装槽，所述安装槽和进料嘴中部的弹性隔热套一一对应设置，安装槽的槽壁与弹性隔热套的外侧面相配合，安装槽的槽底面与弹性隔热套的头端面相配合。The cavity body is provided with more than one installation groove, and the installation groove and the elastic heat insulation sleeve in the middle of the feed nozzle are arranged in one-to-one correspondence. The groove wall of the installation groove matches the outer side surface of the elastic heat insulation sleeve, and the installation groove The bottom surface of the groove is matched with the head end surface of the elastic heat insulation sleeve.
- 根据权利要求1所述的热流道注塑成型的热传导结构，其特征在于，所述主过渡流道的一端通至加热料道本体的一端面上，所述分过渡流道的一端与主过渡流道的另一端连通，分过渡流道的另一端通至加热料道本体的侧面上。The heat conduction structure for hot runner injection molding according to claim 1, wherein one end of the main transition flow channel is connected to an end surface of the heating channel body, and one end of the branch transition flow channel is connected to the main transition flow. The other end of the channel is connected, and the other end of the branch transition channel is connected to the side surface of the heating material channel body.
- 根据权利要求2所述的热流道注塑成型的热传导结构，其特征在于，两个以上的分过渡流道沿加热料道本体的周向均布设置。The heat conduction structure for hot runner injection molding according to claim 2, wherein more than two branch transition runners are uniformly arranged along the circumference of the heating channel body.
- 根据权利要求3所述的热流道注塑成型的热传导结构，其特征在于，所述加热料道本体呈正棱柱状，所述分过渡流道和热料道本体的侧面的数量相同且一一对应设置。The heat conduction structure for hot runner injection molding according to claim 3, wherein the heating sprue body is in the shape of a right prism, and the number of side surfaces of the branch transition runner and the hot sprue body are the same and arranged in one-to-one correspondence. .
- 根据权利要求1所述的热流道注塑成型的热传导结构，其特征在于，所述进料嘴的中心轴线与对应的分过渡流道的中心轴线共轴线设置，进料嘴的头部呈锥尖状，进料嘴的流道从进料嘴的尾部通至头部，进料嘴的流道的尾部与对应的分过渡流道连通，进料嘴的流道的头部端口为料嘴出料口。The heat conduction structure for hot runner injection molding according to claim 1, wherein the central axis of the feed nozzle and the central axis of the corresponding branch transition channel are coaxially arranged, and the head of the feed nozzle is tapered. The flow channel of the feed nozzle leads from the tail to the head of the feed nozzle. The tail of the flow channel of the feed nozzle is connected with the corresponding branch transition channel. The head port of the flow channel of the feed nozzle is the outlet of the feed nozzle. Material mouth.
- 根据权利要求5所述的热流道注塑成型的热传导结构，其特征在于，所述进料嘴的流道的头部偏轴设置；所述型腔本体上设有一个以上的储料仓，所述储料仓和进料嘴的头部一一对应设置，并且储料仓与相对应的进料嘴的料嘴出料口连通，储料仓上设有与型腔 本体的产品成型腔体连通的进料口，所述进料口与进料嘴头部的锥尖端相对应且两者之间设有进料间隙。The heat conduction structure for hot runner injection molding according to claim 5, wherein the head of the runner of the feed nozzle is arranged off-axis; the cavity body is provided with more than one storage bin, so The storage bin and the head of the feed nozzle are arranged in a one-to-one correspondence, and the storage bin is connected with the discharge port of the corresponding feed nozzle, and the storage bin is provided with a product molding cavity with the cavity body A connected feed port, the feed port corresponds to the cone tip of the feed nozzle head and a feed gap is provided between the two.
- 根据权利要求1-6任一项所述的热流道注塑成型的热传导结构，其特征在于，所述弹性隔热套采用非金属材料制成。The hot runner injection molding heat conduction structure according to any one of claims 1-6, wherein the elastic heat insulation sleeve is made of non-metallic materials.
- 根据权利要求1-6任一项所述的热流道注塑成型的热传导结构，其特征在于，所述弹性隔热套包括金属骨架和弹性体，所述金属骨架呈环套状，金属骨架外包裹弹性体。The hot runner injection molding heat conduction structure according to any one of claims 1-6, wherein the elastic heat insulation sleeve comprises a metal frame and an elastomer, the metal frame is in the shape of a ring sleeve, and the metal frame is externally wrapped Elastomer.
- 根据权利要求1-6任一项所述的热流道注塑成型的热传导结构，其特征在于，所述弹性隔热套包括弹性体和两个金属骨架，所述弹性体呈环套状，弹性体的两个端面上分别同心设有一环形槽，所述环形槽内设有一个环状且相配的金属骨架。The hot runner injection molding heat conduction structure according to any one of claims 1-6, wherein the elastic heat insulation sleeve comprises an elastic body and two metal skeletons, the elastic body is in the shape of a ring sleeve, and the elastic body An annular groove is arranged concentrically on the two end surfaces of the, and an annular and matching metal skeleton is arranged in the annular groove.
- 根据权利要求1-6任一项所述的热流道注塑成型的热传导结构，其特征在于，所述弹性隔热套包括金属套和弹性体套，所述弹性体套套于金属套的外周侧。The hot runner injection molding heat conduction structure according to any one of claims 1 to 6, wherein the elastic heat insulation sleeve comprises a metal sleeve and an elastomer sleeve, and the elastomer sleeve is sleeved on the outer peripheral side of the metal sleeve.
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| DE102007029954A1 (en) * | 2007-06-28 | 2009-01-02 | Sfr Formenbau Gmbh | Arrangement of an injection nozzle for guiding melt mass in a plastic injection mold od. Like. |
| CN103786315A (en) * | 2008-04-29 | 2014-05-14 | 马斯特模具（2007）有限公司 | Injection molding apparatus having edge-gated runnerless nozzle and related method of tip removal |
| CN201544416U (en) * | 2009-12-15 | 2010-08-11 | 深圳市米高科技有限公司 | Side water-entering multi-point hot nozzle |
| CN108908860A (en) * | 2018-06-30 | 2018-11-30 | 深圳市麦士德福科技股份有限公司 | A kind of mold for injection molding thermoset plastics |
| CN109702967A (en) * | 2019-02-15 | 2019-05-03 | 贝普医疗科技有限公司 | A kind of heat conduction structure of hot channel injecting formation |
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| Publication number | Publication date |
|---|---|
| CN109702967A (en) | 2019-05-03 |
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