ES2595099A1 - Procedure for the design of the system of expulsion rods for a mold (Machine-translation by Google Translate, not legally binding) - Google Patents
Procedure for the design of the system of expulsion rods for a mold (Machine-translation by Google Translate, not legally binding) Download PDFInfo
- Publication number
- ES2595099A1 ES2595099A1 ES201631252A ES201631252A ES2595099A1 ES 2595099 A1 ES2595099 A1 ES 2595099A1 ES 201631252 A ES201631252 A ES 201631252A ES 201631252 A ES201631252 A ES 201631252A ES 2595099 A1 ES2595099 A1 ES 2595099A1
- Authority
- ES
- Spain
- Prior art keywords
- points
- pijr
- procedure
- pijexp
- design
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title abstract description 5
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3835—Designing moulds, e.g. using CAD-CAM
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Procedimiento para el diseño del sistema de varillas de expulsión para un molde de inyección que comprende: crear una cuadrícula de nodos (Nk) plana sobre un plano perpendicular al movimiento de la cavidad del molde; determinar los puntos (Pij) de la pieza (M') correspondientes a la intersección con una recta (Rt) perpendicular al plano que pasa por cada nodo (Nk); calcular el espesor (Eij) correspondiente a cada punto (Pij); identificar los puntos donde existen (Pijr) y donde no existen (Pijv) cambios de espesor; determinar como puntos (Pijexp) candidatos aquellos puntos (Pijv) cuya primera superficie circundante no contenga ningún punto (Pijr); calcular el número de puntos (Pijr) contenidos en una segunda superficie circundante a cada punto (Pijexp), donde la segunda superficie es mayor que la primera superficie; y seleccionar como puntos (Pijexpo) de expulsión aquellos puntos (Pijexp) cuyo número de puntos (Pijr) contenidos en la segunda superficie constituya un máximo local.Procedure for the design of the ejection rod system for an injection mold comprising: creating a flat node grid (Nk) on a plane perpendicular to the movement of the mold cavity; determine the points (Pij) of the piece (M ') corresponding to the intersection with a line (Rt) perpendicular to the plane that passes through each node (Nk); calculate the thickness (Eij) corresponding to each point (Pij); identify the points where (Pijr) exist and where there are no (Pijv) thickness changes; determine as candidate points (Pijexp) those points (Pijv) whose first surrounding surface does not contain any points (Pijr); calculate the number of points (Pijr) contained in a second surface surrounding each point (Pijexp), where the second surface is greater than the first surface; and select as expulsion points (Pijexpo) those points (Pijexp) whose number of points (Pijr) contained in the second surface constitutes a local maximum.
Description
La Fig. 9 muestra una representación de los nodos Pijv y Pijr sobre Ʃ’. Fig. 9 shows a representation of the nodes Pijv and Pijr on Ʃ ’.
La Fig. 10 muestra la localización de los puntos Pijexp. Fig. 10 shows the location of the Pijexp points.
5 La Fig. 11 muestra la representación de los puntos Pijexp. 5 Fig. 11 shows the representation of the Pijexp points.
La Fig. 12 muestra el procedimiento para la localización de los expulsores sobre Ʃ’. Fig. 12 shows the procedure for locating ejectors on Ʃ ’.
La Fig. 13 muestra un ejemplo de la estimación del número de nodos Pijr por nodo Pijexp. Fig. 13 shows an example of the estimation of the number of Pijr nodes per Pijexp node.
10 La Fig. 14 muestra la concentración de nodos Pijr por nodo Pijexp indicada en escala de grises en un análisis realizado con precisión λ/2 y donde los p untos de expulsión se representan mediante esferas blancas sobre la pieza M’. 10 Fig. 14 shows the concentration of Pijr nodes per Pijexp node indicated in grayscale in an analysis with precision λ / 2 and where the ejection points are represented by white spheres on the M ’piece.
15 REALIZACIÓN PREFERENTE DE LA INVENCIÓN 15 PREFERRED EMBODIMENT OF THE INVENTION
A continuación, se describe con mayor detalle la presente invención haciendo referencia a las figuras adjuntas. In the following, the present invention is described in more detail with reference to the attached figures.
20 Datos iniciales 20 Initial data
El procedimiento que se describe en este documento toma tres datos como entrada: The procedure described in this document takes three data as input:
1) Una geometría discreta de una pieza M’ que está formada por un conjunto de 1) A discrete geometry of a piece M ’that is formed by a set of
25 elementos planos triangulares y nodos, como se muestra en la Fig. 1b. En este ejemplo concreto, la geometría discreta de la pieza M’ ha sido obtenida mediante un proceso de escaneado digital de una pieza real M representada en la Fig. 1a. En cualquier caso, como se ha comentado con anterioridad en este documento, también sería posible obtener la geometría discreta de la pieza M’ a partir de una 25 triangular flat elements and nodes, as shown in Fig. 1b. In this specific example, the discrete geometry of part M ’has been obtained by a digital scanning process of a real part M represented in Fig. 1a. In any case, as mentioned earlier in this document, it would also be possible to obtain the discrete geometry of the M ’piece from a
30 geometría de la pieza M generada mediante CAD en formato continuo B-Rep. 30 geometry of the M part generated by CAD in continuous B-Rep format.
2) Un conjunto de superficies Σ’ en formato discreto en una realización preferente pertenecientes a la pieza M’ que serán moldeables por la cavidad inferior del molde, figura 2. 2) A set of surfaces Σ ’in discrete format in a preferred embodiment belonging to part M’ that will be moldable by the lower mold cavity, figure 2.
35 3) Un valor λ que determina la precisión de la malla nodal bidimensional (distancia 9 35 3) A value λ that determines the precision of the two-dimensional nodal mesh (distance 9
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES201631252A ES2595099B2 (en) | 2016-09-27 | 2016-09-27 | Procedure for the design of the ejection rod system for a mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES201631252A ES2595099B2 (en) | 2016-09-27 | 2016-09-27 | Procedure for the design of the ejection rod system for a mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2595099A1 true ES2595099A1 (en) | 2016-12-27 |
| ES2595099B2 ES2595099B2 (en) | 2017-05-04 |
Family
ID=57624228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES201631252A Active ES2595099B2 (en) | 2016-09-27 | 2016-09-27 | Procedure for the design of the ejection rod system for a mold |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES2595099B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5641448A (en) * | 1996-03-11 | 1997-06-24 | National Research Council Of Canada | Method of producing plastic injection molds for prototype parts |
| US20030126038A1 (en) * | 2001-12-27 | 2003-07-03 | The Protomold Company, Inc. | Automated quoting of molds and molded parts |
| ES2206303T3 (en) * | 1999-09-24 | 2004-05-16 | Moldflow Corporation | METHOD AND APPLIANCE FOR MODELING THE INJECTION OF A FLUID IN THE CAVITY OF A MOLD. |
| WO2010127772A2 (en) * | 2009-05-07 | 2010-11-11 | Magma Giessereitechnologie Gmbh | Simulation of ejection after mold filling |
-
2016
- 2016-09-27 ES ES201631252A patent/ES2595099B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5641448A (en) * | 1996-03-11 | 1997-06-24 | National Research Council Of Canada | Method of producing plastic injection molds for prototype parts |
| ES2206303T3 (en) * | 1999-09-24 | 2004-05-16 | Moldflow Corporation | METHOD AND APPLIANCE FOR MODELING THE INJECTION OF A FLUID IN THE CAVITY OF A MOLD. |
| US20030126038A1 (en) * | 2001-12-27 | 2003-07-03 | The Protomold Company, Inc. | Automated quoting of molds and molded parts |
| WO2010127772A2 (en) * | 2009-05-07 | 2010-11-11 | Magma Giessereitechnologie Gmbh | Simulation of ejection after mold filling |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2595099B2 (en) | 2017-05-04 |
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