CN109551715B - Structure and design method of injection molding part sprue position - Google Patents
Structure and design method of injection molding part sprue position Download PDFInfo
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- CN109551715B CN109551715B CN201811283687.9A CN201811283687A CN109551715B CN 109551715 B CN109551715 B CN 109551715B CN 201811283687 A CN201811283687 A CN 201811283687A CN 109551715 B CN109551715 B CN 109551715B
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 164
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000007704 transition Effects 0.000 claims abstract description 9
- 230000004927 fusion Effects 0.000 claims description 21
- 230000001965 increasing effect Effects 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 27
- 239000012530 fluid Substances 0.000 abstract description 26
- 230000006378 damage Effects 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Classifications
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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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The structure of injection molding runner position, the runner position of its characterized in that injection molding is outside bellied protruding structure, just protruding structure for from top to bottom diameter crescent and the hollow tubulose of wall body smooth transition no edges and corners, the injection molding runner is located the top of protruding structure. The invention aims to provide a structure at the sprue position of an injection molding part aiming at the problem of low strength of the sprue position of an injection molding structure part, so that the structural strength of the sprue position of the injection molding part is improved, the structure at the sprue position of the injection molding part is not easy to deform and damage in the bearing process, the use reliability of the injection molding part is improved, the service life of the injection molding part is prolonged, the fluidity of a fluid material at the sprue position is effectively improved, and the injection molding process performance of the injection molding part is improved. The invention also provides a structural design method of the injection molding part sprue position.
Description
Technical Field
The invention relates to a structure and a design method of a gate position of an injection molding part, which are used for enhancing the bearing strength of the gate position of the injection molding part and improving the injection molding process performance of the injection molding part.
Background
In the light application field, an injection molding structure is often used to replace a metal structure, and an injection molding gate is low in strength and generally not suitable for bearing excessive load. However, in the actual structure design, under the comprehensive consideration of economy and formability, the sprue position of some injection molding structural parts needs to bear large load, and even inevitably occurs on the main force transmission path of the structure.
The prior art to injection structure runner often improves the mould runner, promotes the manufacturability of moulding plastics, and is less to the prior art who solves structure runner department intensity defect problem. The prior art to the improvement of injection molding structural strength mainly is towards the improvement of the material of moulding plastics to effectively promote the holistic intensity of injection molding, but can't overcome the intensity defect that runner position manufacturability brought.
The prior patent documents of the detected gate structure of the related injection molding part are as follows:
CN 201210443311-product gate structure with thinner wall thickness;
CN 201520506291-a gate structure of injection molding die;
CN 201610379259-sprue structure and molding method of injection mold for soft rubber watchband products;
CN201620173304 — high strength injection molding;
CN201721192363, an injection mold for improving a gate structure;
CN 201721855523-a mold for preventing sticking mold from breaking the gate structure;
CN201810265563, a gate structure of a car casting machine;
CN 201820229944-a lost foam flow coating process protects the ingate structure.
In the above-mentioned prior art patent documents, the prior art of the injection gate position is mainly focused on the mold, and the purpose of improving the manufacturability of the injection molded part is to be achieved. The prior art aiming at improving the strength of the injection molding structure mainly focuses on the improvement of the material technology and the optimized arrangement of the whole structure. No solution and structure for the problem of strength defect at the position of a sprue of an injection molding structural part exist. The invention mainly solves the problems that the injection molding structural part, particularly the bearing structural part, has insufficient strength at the injection gate position and is easy to damage under certain load.
Disclosure of Invention
The invention aims to provide a structure at the sprue position of an injection molding part aiming at the problem of low strength of the sprue position of an injection molding structure part, so that the structural strength of the sprue position of the injection molding part is improved, the structure at the sprue position of the injection molding part is not easy to deform and damage in the bearing process, the use reliability of the injection molding part is improved, the service life of the injection molding part is prolonged, the fluidity of a fluid material at the sprue position is effectively improved, and the injection molding process performance of the injection molding part is improved. The invention also provides a structural design method of the injection molding part sprue position.
In order to achieve the purpose, the invention adopts the technical scheme that:
the structure of injection molding runner position, the runner position of its characterized in that injection molding is outside bellied protruding structure, just protruding structure for from top to bottom diameter crescent and the hollow tubulose of wall body smooth transition no edges and corners, the injection molding runner is located the top of protruding structure.
Preferably, the top of the convex structure is a plane, and the injection molding part gate is located at the center of the top surface of the convex structure.
Preferably, protruding structure constitute by annular side wall and the plane roof that closes annular side wall top, annular side wall be from last loudspeaker flaring shape that the diameter is crescent to down, annular side wall and plane roof between pass through the fillet transition, the central point that sets up at the plane roof is put to the injection molding runner.
Preferably, the annular side wall is a circular arc surface, and the radius of the circular arc surface of the annular side wall is at least 10 times of the radius of a fillet between the annular side wall and the plane top wall.
Preferably, the bottom edge of the protruding structure is an annular edge designed in the axial direction, the height of the bottom edge is equal to the thickness of the protruding structure, and the bottom edge is connected with other parts of the injection molding part in a fusion mode.
Preferably, the bulge structure is provided with a shunting rib connected with other parts of the injection molding part.
Preferably, the shunting rib penetrates through the protruding structure from any direction, two ends of the shunting rib are respectively connected with other parts of the injection molding part in a fusion mode, or one end of the shunting rib is connected with the protruding structure in a fusion mode, and the other end of the shunting rib is connected with other parts of the injection molding part in a fusion mode.
The structural design method of the injection molding part sprue position is characterized in that the shape and the size of the protruding structure are designed according to the bearing requirement and the injection molding flow requirement of the injection molding part sprue position, then the position of the injection molding part sprue on the protruding structure is designed according to the shape of the protruding structure, and the size of the injection molding part sprue is designed according to the size of the protruding structure.
Preferably, "designing the shape of the convex structure" refers to designing the shape of the top surface of the convex structure and the shape of the side wall of the convex structure, and designing the size of the convex structure refers to designing the axial height, the top radius, the radius of the side wall, the bottom radius and the thickness of the convex structure.
Preferably, the number of the shunting ribs on the protruding structure, the connecting positions of the two ends and the diameter are designed according to the bearing requirement and the injection molding flow requirement of the injection molding part sprue position.
The invention has the beneficial effects that:
1. the gate position of the injection molding part is designed into an outward convex structure, the convex structure is a hollow tubular structure with the diameter gradually increasing from the top to the bottom and the wall body smoothly transited without edges, namely the cross section area of the convex structure close to other parts of the injection molding part is the largest, the cross section area is gradually reduced towards the convex direction, a tubular structure with different sections from top to bottom is formed, the top of the convex structure is contacted with a carried body during bearing, the stress area of the convex structure from the top to the bottom is gradually increased, the bearing strength is increased, the structural strength of the gate position of the injection molding part is improved, the structure of the gate position of the injection molding part is ensured not to be easily deformed and damaged during bearing, the use reliability of the injection molding part is improved, and the service life of the injection.
2. The injection molding runner is designed at the protruding top, so that when injection molding glue injection molding of the injection molding is guaranteed, the fluid material flows downwards along the protruding structure from the top of the protruding structure, the flow area of the fluid material is gradually increased from top to bottom in the protruding structure, a good flow channel is formed, the injection molding flow demand of the injection molding is met, the flowability of the fluid material at the runner position is effectively improved, and the injection molding process performance of the injection molding is improved.
3. The top surface of the protruding structure is designed into a plane top wall, the annular side wall of the protruding structure is designed into a horn flaring shape with the diameter gradually increasing from top to bottom, the plane top wall and the annular side wall can be transited by a round angle, the flow path of a fluid material is ensured to be a plane or a circular arc surface in the injection molding process, the flow speed stability of the fluid material is better, and the fluid pressure is more stable; the bottom edge of the protruding structure is designed to be an axially designed annular edge, and fluid materials flow out from the bottom edge to form other parts of the injection molding part which are connected with the bottom edge in a fusion mode, so that the flow channel area of the other parts of the injection molding part in the injection molding process is larger, the distribution uniformity, the flow speed stability and the pressure stability of the fluid materials in the injection molding process of the injection molding part can be effectively improved, and the technological performance of the injection molding part is further improved.
4. The flow distribution ribs connected with other parts of the injection molding part are designed on the convex structure, so that on one hand, the number of flow channels between the convex structure and other parts of the injection molding part is increased in the injection molding process, and fluid materials at the parts are effectively distributed from the convex structure through the flow distribution ribs, and the injection molding efficiency is improved; on the other hand, the shunting rib penetrates through the protruding structure or one end of the shunting rib is connected with the protruding structure in a fusion mode, and the other end of the shunting rib is connected with other parts of the injection molding piece in a fusion mode, so that the protruding structure is supported, the strength of the protruding structure is further improved, and the structural strength of a sprue position of the injection molding piece is further improved.
Drawings
FIG. 1 is a schematic diagram of a configuration of an injection molding gate location in an embodiment.
Fig. 2 is a cross-sectional view of fig. 1.
FIG. 3 is a front cross-sectional view of an embodiment injection molded stem.
Fig. 4 is a sectional view taken along line a-a of fig. 3.
Detailed Description
The following describes an embodiment of the present invention in detail with reference to fig. 1 to 4.
The structure of injection molding runner position, the runner position of its characterized in that injection molding is outside bellied protruding structure 1, just protruding structure 1 for from top to bottom diameter crescent and the hollow tube form of wall body smooth transition no edges and corners, the injection molding runner is located protruding structure 1's top.
As shown in the figure, be outside bellied protruding structure 1 with the design of runner position of injection molding, and protruding structure 1 is from top to bottom diameter crescent and the hollow tube form of wall body smooth transition no edges and corners, the cross-sectional area that protruding structure 1 is close to other positions of injection molding is the biggest promptly, to protruding direction cross sectional area reduce gradually, form from last unequal tubular structure of cross-section down, the top of protruding structure with by the carrier contact when bearing, the lifting surface area of protruding structure from top to bottom surface crescent, bearing strength increases, improve the structural strength of injection molding runner position, guarantee that the structure of injection molding runner position is difficult for taking place deformation and destruction at the bearing in-process, improve the reliability in use of injection molding, the life of extension injection molding. The injection molding runner A is designed at the protruding top, so that when injection molding glue injection molding of the injection molding is guaranteed, the fluid material flows downwards along the protruding structure from the top of the protruding structure, the flow area of the fluid material in the protruding structure is gradually increased from top to bottom, a good flow channel is formed, the injection molding flow demand of the injection molding is met, the flowability of the fluid material at the runner position is effectively improved, and the injection molding process performance of the injection molding is improved.
The top of the convex structure 1 is a plane, and the injection molding part gate is located at the center of the top surface of the convex structure 1. The top of the protruding structure 1 is a plane, when the fluid material is formed, the fluid material flows from the center of the top of the protruding structure 1 to the periphery, the flow channel area is larger, the flowing material is uniformly dispersed, and the flowing performance is better.
Wherein, protruding structure 1 constitute by annular side wall 11 and with annular side wall 11 top confined plane roof 12, annular side wall 12 be from last loudspeaker flaring shape that the diameter is crescent to lower, annular side wall 11 and plane roof 12 between through fillet transition, the central point that injection molding runner was seted up at plane roof 12 puts.
Annular lateral wall 11 be the cambered surface, just the cambered surface radius of annular lateral wall 11 is at least 10 times of fillet radius between annular lateral wall and the plane roof 12.
The top surface of the protruding structure 1 is designed into a plane top wall 12, the annular side wall 11 of the protruding structure is designed into a horn flaring shape with the diameter gradually increasing from top to bottom, the plane top wall 12 and the annular side wall 11 can be in fillet transition, the flow path of the fluid material in the injection molding process is guaranteed to be a plane or a circular arc surface, the flow speed stability of the fluid material is better, and the fluid pressure is more stable.
The bottom end edge 11.1 of the protruding structure 1 is an annular edge designed in the axial direction, the height of the bottom end edge 11.1 is equal to the thickness of the protruding structure 1, and the bottom end edge 11.1 is connected with other parts of the injection molding part in a fusion mode. The bottom end edge 11.1 of the protruding structure is designed to be an axially designed annular edge, and fluid materials flow out from the bottom end edge 11.1 along the radial direction to form other parts of the injection molding part which are connected with the bottom end edge in a fusion mode, so that the flow channel area of the other parts of the injection molding part in the injection molding process is larger, the distribution uniformity, the flow speed stability and the pressure stability of the fluid materials in the injection molding process of the injection molding part can be effectively improved, and the technological performance of the injection molding part is further improved.
The convex structure 1 is provided with a shunt rib 13 connected with other parts of the injection molding part.
The shunting bar 13 penetrates through the convex structure 1 from any direction, two ends of the shunting bar are respectively connected with other parts of the injection molding part in a fusion mode, or one end of the shunting bar 13 is connected with the convex structure 11 in a fusion mode, and the other end of the shunting bar is connected with other parts of the injection molding part in a fusion mode.
The flow distribution ribs 13 connected with other parts of the injection molding part are designed on the convex structure 1, so that on one hand, the number of flow channels between the convex structure and other parts of the injection molding part is increased in the injection molding process, and fluid materials at the parts are effectively distributed from the convex structure through the flow distribution ribs, so that the injection molding efficiency is improved; on the other hand, the shunting rib penetrates through the protruding structure or one end of the shunting rib is connected with the protruding structure in a fusion mode, and the other end of the shunting rib is connected with other parts of the injection molding piece in a fusion mode, so that the protruding structure is supported, the strength of the protruding structure is further improved, and the structural strength of a sprue position of the injection molding piece is further improved.
In the embodiment of the injection molding rod piece, as shown in fig. 3, the protrusion structure 1 is located on the centerline of the injection molding rod piece, as can be seen from the sectional view taken along the direction a-a shown in fig. 4, the diversion rib 13 is located on the centerline main rib of the injection molding rod piece, one end of the diversion rib is connected with the protrusion structure 11 in a fusion manner, and the other end of the diversion rib is connected with other parts of the injection molding piece in a fusion manner, so that the number of flow channels on the protrusion structure 1 in the injection molding process is increased, the protrusion structure 1 is supported, the strength of the protrusion structure is increased, and the bearing capacity.
The invention also provides a structural design method of the injection molding part sprue position, which is characterized in that the shape and the size of the convex structure 1 are designed according to the bearing requirement and the injection molding flow requirement of the injection molding part sprue position, so that the sprue position is ensured to have a flow passage area capable of meeting the effective and uniform flow of fluid materials in the injection molding process, and the structural strength of the sprue position after the injection molding part is molded is ensured to meet the bearing requirement; then, the position of the injection molding part sprue on the convex structure 1 is designed according to the shape of the convex structure 1, and the size of the injection molding part sprue is designed according to the size of the convex structure 1, so that the fluid material injected from the injection molding part sprue can be effectively, uniformly and stably distributed in the convex structure 1.
The "shape of the designed convex structure 1" refers to the shape of the top surface of the designed convex structure 1 and the shape of the side wall of the designed convex structure 1, and the size of the designed convex structure 1 refers to the axial height, the top radius, the radius of the side wall, the bottom radius and the thickness of the designed convex structure 1.
According to the bearing requirement and the injection molding flow requirement of the injection molding part sprue position, the number of the shunting ribs 13 on the protruding structure 1, and the connection positions and the diameters of the two ends of the protruding structure are designed. On one hand, the number of flow channels between the convex structure and other parts of the injection molding part in the injection molding process is increased through the diversion ribs 13, and the fluid material at the part is effectively diverted from the convex structure through the diversion ribs 13, so that the injection molding efficiency is improved; on the other hand, the shunting rib 13 penetrates through the protruding structure or one end of the shunting rib is connected with the protruding structure in a fusion mode, and the other end of the shunting rib is connected with other parts of the injection molding piece in a fusion mode, so that the protruding structure is supported, the strength of the protruding structure is further improved, and the structural strength of a sprue position of the injection molding piece is further improved.
According to the structural design method for the position of the river mouth of the injection molding part, the protruding structure 1 is designed according to the bearing requirement and the injection molding flow requirement of the sprue position of the injection molding part, and the protruding structure 1 has the flow passage area capable of meeting the effective and uniform flow of fluid materials in the injection molding process so as to improve the injection molding process performance of the injection molding part. And protruding structure 1 on the injection molding back injection molding has the intensity that can satisfy the runner position and bear the weight of the demand, improves the structural strength of injection molding runner position, guarantees that the structure of injection molding runner position is difficult for taking place deformation and destruction in bearing the weight of the in-process, improves the reliability in service of injection molding, prolongs the life of injection molding.
The technical solutions of the embodiments of the present invention are fully described above with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Claims (7)
1. An injection molding structural part is characterized in that a gate position of an injection molding part is an outward convex structure (1), the convex structure (1) is a hollow tube shape with the diameter gradually increasing from the top to the bottom and without edges and corners in smooth transition of a wall body, and the gate of the injection molding part is positioned at the top of the convex structure (1);
the top of the convex structure (1) is a plane, and the injection molding part gate is positioned at the center of the top surface of the convex structure (1);
the bulge structure (1) consists of an annular side wall (11) and a plane top wall (12) for sealing the top of the annular side wall (11), the annular side wall (11) is in a horn flaring shape with the diameter gradually increasing from top to bottom, the annular side wall (11) and the plane top wall (12) are in transition through a fillet, and a gate of an injection molding piece is arranged at the center of the plane top wall (12);
the bottom edge (11.1) of protruding structure (1) be the annular edge of axial design, the height on bottom edge (11.1) equals the thickness of protruding structure (1), bottom edge (11.1) fuses with other positions of injection molding and is connected.
2. An injection molded structural part according to claim 1, wherein said annular side wall (11) is a circular arc surface, and the radius of the circular arc surface of said annular side wall (11) is at least 10 times the radius of the circular arc between the annular side wall and the flat top wall (12).
3. An injection moulded structure as claimed in claim 1, characterised in that the raised formation (1) has a diverter rib (13) which is connected to the remainder of the injection moulded part.
4. An injection-molded structural part according to claim 3, characterized in that the shunt rib (13) penetrates through the protrusion structure (1) from any direction, and both ends of the shunt rib are respectively connected with other parts of the injection-molded part in a fusion manner or one end of the shunt rib (13) is connected with the protrusion structure (1) in a fusion manner and the other end is connected with other parts of the injection-molded part in a fusion manner.
5. A structural design method of an injection molding structure part as claimed in any one of claims 1 to 4, characterized in that the shape and size of the protrusion structure (1) are designed according to the bearing requirement and injection molding flow requirement of the injection molding gate position, then the position of the injection molding gate on the protrusion structure (1) is designed according to the shape of the protrusion structure (1), and the size of the injection molding gate is designed according to the size of the protrusion structure (1).
6. The structural design method of an injection molding structural part according to claim 5, characterized in that "the shape of the design convex structure (1)" refers to the shape of the top surface of the design convex structure (1) and the shape of the side wall of the design convex structure (1), and the size of the design convex structure (1) refers to the axial height, the top radius, the radius of the side wall, the bottom radius and the thickness of the design convex structure (1).
7. The structural design method of the injection molding structural part according to claim 5, characterized in that the number of the shunting ribs (13), the connecting positions of the two ends and the diameters of the shunting ribs (13) on the convex structure (1) are designed according to the bearing requirements and the injection molding flow requirements of the sprue position of the injection molding part.
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| CN201811283687.9A CN109551715B (en) | 2018-10-31 | 2018-10-31 | Structure and design method of injection molding part sprue position |
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| CN201811283687.9A CN109551715B (en) | 2018-10-31 | 2018-10-31 | Structure and design method of injection molding part sprue position |
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| CN109551715B true CN109551715B (en) | 2021-04-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5588209A (en) * | 1994-05-04 | 1996-12-31 | The Tempered Spring Company Limited | Method and apparatus to manufacture stabilizer bars |
| US5946871A (en) * | 1994-05-18 | 1999-09-07 | Don De Cristo Concrete Accessories, Inc. | Reinforcing bar protective cover |
| CN104395114A (en) * | 2012-06-15 | 2015-03-04 | 日本发条株式会社 | Stabilizer link and manufacturing method therefor |
| CN206662201U (en) * | 2017-04-24 | 2017-11-24 | 无锡邦得机械有限公司 | Charge air cooler dextrad air chamber casting mould |
| CN206811086U (en) * | 2017-05-23 | 2017-12-29 | 西安秦鼎精铸制造有限公司 | A kind of sprue cup |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204322438U (en) * | 2014-11-24 | 2015-05-13 | 东莞劲胜精密组件股份有限公司 | A gate structure with a buffer zone |
| CN205148773U (en) * | 2015-11-27 | 2016-04-13 | 柳道（青岛）热流道系统有限公司 | Hot mouth of hot runner and hot mouth of hot runner |
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2018
- 2018-10-31 CN CN201811283687.9A patent/CN109551715B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5588209A (en) * | 1994-05-04 | 1996-12-31 | The Tempered Spring Company Limited | Method and apparatus to manufacture stabilizer bars |
| US5946871A (en) * | 1994-05-18 | 1999-09-07 | Don De Cristo Concrete Accessories, Inc. | Reinforcing bar protective cover |
| CN104395114A (en) * | 2012-06-15 | 2015-03-04 | 日本发条株式会社 | Stabilizer link and manufacturing method therefor |
| CN206662201U (en) * | 2017-04-24 | 2017-11-24 | 无锡邦得机械有限公司 | Charge air cooler dextrad air chamber casting mould |
| CN206811086U (en) * | 2017-05-23 | 2017-12-29 | 西安秦鼎精铸制造有限公司 | A kind of sprue cup |
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