WO2017023959A1 - Procédé et outil de moulage par injection - Google Patents

Procédé et outil de moulage par injection Download PDF

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Publication number
WO2017023959A1
WO2017023959A1 PCT/US2016/045224 US2016045224W WO2017023959A1 WO 2017023959 A1 WO2017023959 A1 WO 2017023959A1 US 2016045224 W US2016045224 W US 2016045224W WO 2017023959 A1 WO2017023959 A1 WO 2017023959A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
segment
tool
segments
seal
Prior art date
Application number
PCT/US2016/045224
Other languages
English (en)
Inventor
Thomas Murdoch
Original Assignee
Illinois Tool Works Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from AU2015903128A external-priority patent/AU2015903128A0/en
Priority claimed from AU2016210598A external-priority patent/AU2016210598B9/en
Application filed by Illinois Tool Works Inc. filed Critical Illinois Tool Works Inc.
Priority to NZ739038A priority Critical patent/NZ739038A/en
Priority to US15/746,272 priority patent/US11305308B2/en
Priority to EP16756833.6A priority patent/EP3331649B1/fr
Publication of WO2017023959A1 publication Critical patent/WO2017023959A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00576—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container
    • 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
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • 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
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/0005—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components
    • B05C17/00559—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components the different components being stored in coaxial chambers
    • 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
    • B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
    • B29C2045/338—Mould parts with combined axial and transversal movements

Definitions

  • the present invention relates to a tool for forming a cartridge piston and method.
  • Sealing of cartridges used for multi-part fluids such as adhesives having a resin and catalyst, for example a masonry anchor cement, can be difficult as highly fluid components of resin and/or catalyst can be very fine in nature and find a path through the smallest gap between a seal and cartridge wall. As such, it is important that seals formed on the piston are optimally formed. To provide a piston having such seals has previously been difficult and expensive as previous pistons have been formed by injection moulding processes and then subjected to post-forming machining operations to obtain a piston having sealing edges which are formed of sufficient accuracy. Examples of the invention seek to solve, or at least ameliorate, one or more disadvantages of previous pistons.
  • a piston for use in a cartridge for dispensing multi-part fluids, the piston being injection moulded and having integrally formed circumferential seals, wherein the piston is moulded in the absence of a longitudinal parting line across the seals.
  • the piston has forward and rearward circumferential seals and the forward seal has an annular deflection member extending therefrom, the deflection member being configured to deflect radially inward to inwardly deflect the forward seal to assist in removal from an injection moulding tool.
  • a tool for forming a piston having a plurality of circumferential seals for use in a cartridge for dispensing multipart fluids comprising a plurality of segments together defining a piston cavity corresponding to an outer periphery of the piston, the segments including:
  • a central segment defining a generally cylindrical main body cavity for forming a circumferential portion of the piston, wherein a longitudinal axis of the central segment defines a tool draw axis;
  • a rearward segment for forming at least a rear end of the piston, the rearward segment being configured to engage the central segment to at least partially form a rearward sealing edge of a rearward seal on the piston;
  • forward, rearward and intermediate segments are axially movable along the longitudinal axis with respect to each other, and
  • first intermediate segment is configured to extend behind the deflection member in the tool draw axis to form an undercut.
  • the deflection member is annular and extends from the forward seal.
  • a portion of the second intermediate segment is configured to extend behind the first sealing edge in the tool draw axis to form an undercut.
  • the first and second intermediate segments are separable in the longitudinal direction to facilitate removal of a formed piston by allowing for deflection of the first sealing edge during removal of the piston from the tool.
  • the central segment is formed in two parts that meet in a longitudinal plane.
  • the rearward segment is formed in two parts that are separable to facilitate ejection of a formed piston from the tool.
  • the first intermediate section urges the deflection member radially inward to deflect the forward seal inwardly to allow removal of the second intermediate segment over the forward seal.
  • a method of forming a cartridge piston seal comprising the steps of:
  • the method can include the step of removing the forward and intermediate segments while the material is still elastically deformable to allow for flexing of portions of the piston formed with an undercut to permit passage of the intermediate sections.
  • the method can further comprise the step of separating the first and second intermediate segments by advancing the first intermediate segment a small distance to deflect the deflection member before together removing the first and second intermediate segments to allow removal of the formed piston.
  • Figure 1 is a perspective view of an outer piston formed with a tool and method of one embodiment of the invention
  • Figure 2 is a side view of the piston of Figure 1;
  • Figure 3 is a close partial section view of the piston of Figure 1;
  • Figure 4 is a perspective view of an inner piston formed with a tool and method of one embodiment of the invention.
  • Figure 5 is a side view of the piston of Figure 4;
  • Figure 6 is a side sectional view of a tool of one embodiment of the invention, the tool being in an expanded state;
  • Figure 7 is a side sectional view of the tool in a closed state
  • Figure 8 is another side sectional view of the tool showing the piston in a sectioned form
  • Figure 9 is a side sectional view of the tool showing a forward segment in a partially advanced state
  • Figure 10 is a side sectional view of the tool showing first and second intermediate segments separated
  • Figure 11 is a side sectional view of the tool showing first and second intermediate segments in a partially advanced state
  • Figure 12 is a side sectional view of the tool with forward and intermediate segments removed and showing central sections parted and a rearward segment being separated to eject a formed piston.
  • a piston 10 according to a preferred embodiment of the present invention.
  • the piston 10 is configured for use in a cartridge for dispensing multi-part fluids such as two-part adhesive masonry cement mixtures.
  • the piston 10 is injection moulded, has integrally formed circumferential seals and is moulded in the absence of a longitudinal parting line across the seals.
  • the piston 10 can formed without parting lines that have an adverse effect on the sealing performance of the piston 10. Also, the piston 10 be manufactured without post-forming machining being required, thereby reducing manufacturing costs.
  • the piston 10 has a forward end 11 which is forwardmost when used in a cartridge, and a rearward end 13 which is rearmost in use.
  • the piston has, on an outer peripheral portion 17, a deflection member 12, a forward seal 14 and a rear seal 16, which can be more clearly seen in Figures 2 and 3.
  • the piston 10 is configured for use as an outer piston in a cartridge having coaxial reservoirs and has an inner portion 19 for engagement with a wall of the cartridge.
  • the inner sealing portion 19 includes a deflection member 18, a forward seal 20 and a rear seal 22, each of which are similarly configured to seals 12, 14 and 16 on the outer peripheral portion 17.
  • the rear seal 22 or rear seal 16 could be omitted and the surface radiused.
  • the deflection member 18 is annular and extends from the forward seal 20.
  • the deflection member 18 is configured to deflect radially inward to inwardly deflect the forward seal 20 to assist in removal from an injection moulding tool.
  • Figures 4 and 5 illustrate a second piston 30, configured for use as an inner piston in a cartridge having coaxial reservoirs.
  • the piston 30 also includes a deflection member 32, a forward seal 34 and a rear seal 36.
  • the tool 50 is configured for forming a piston having a plurality of circumferential seals for use in a cartridge for dispensing multi-part fluids.
  • the tool 50 is configured for forming piston 10 and in another embodiment, tool 50 is configured for forming piston 30.
  • the following description is in respect of forming piston 10, though it will be appreciated that it equally applies to piston 30.
  • the tool 10 comprises a plurality of segments together defining a piston cavity corresponding to an outer periphery of the piston 12.
  • the segments include central segments 52a, 52b, rearward segments 56a, 56b, a forward segment 54, and at least a pair of intermediate segments 58, 60.
  • the central segments 52a, 52b are transversely movable and meet in a longitudinal plane so as to together define a generally cylindrical main body cavity for forming a circumferential outer portion of the piston 10.
  • a longitudinal axis of the main body cavity defines a tool draw axis for the rearward segments 56a, 56b, the forward segment 54, and the intermediate segments 58, 60, which are all axially movable along the longitudinal axis with respect to each other.
  • the rearward segments 56a, 56b are configured for forming at least a rear end of the piston 10. This may include a rearward face, along with internal cavities and strengthening ribs. Although a pair of rearward segments 56a, 56b are shown, it will be appreciated that a single rearward segment may also be used. Such an arrangement may include a plurality of ejector pins movable within the segment to facilitate ejection of the piston 10 from the tool 50.
  • Rearward segment 56b is configured to form a portion of the rear end that includes internal cavities and strengthening ribs.
  • Rearward segment 56a is configured to engage the central segments 52a, 52b to at least partially form the rear seal 16.
  • rearward segment 56a meets the central segments 52a, 52b at a forward end of the rear seal 16 to form a sealing edge.
  • the rear seal 16 is formed with a circumferential parting line at the forward end of the seal and any flashing that occurs at this point will not be detrimental to the sealing performance of the piston 10. This arrangement also provides that the rear seal 16 can be formed without transverse parting lines that require post forming machining operations to be performed to prevent leakage of the seal.
  • Forward segment 54 is configured for forming at least a forward end of the piston. This may include a forward face, along with internal cavities and strengthening ribs.
  • Intermediate segments 58 and 60 are disposed intermediate the forward segment 54 and the central segments 52a, 52b.
  • the first intermediate segment 58 is disposed adjacent the forward segment 54 and configured so that the forward segment 54 and the first intermediate segment 58 together form a deflection member 12.
  • the second intermediate segment 60 is disposed adjacent the central segments 52a, 52b and configured so that the second intermediate segment 60 and the central segments 52a, 52b together form a first or forward sealing edge on a periphery of a forward piston seal, i.e. the forward seal 14.
  • the forward seal 14 is formed with a circumferential parting line at the forward end of the seal and any flashing that occurs at this point will not be detrimental to the sealing performance of the piston 10.
  • This arrangement also provides that the forward seals 14 can be formed without transverse parting lines that require post forming machining operations to be performed to prevent leakage of the seal.
  • the first intermediate segment 58 is configured so that a portion thereof extends behind the deflection member 12 in the tool draw axis to form an undercut.
  • a portion of the second intermediate segment 60 is configured to extend behind the forward seal 14 in the tool draw axis to form an undercut.
  • the first and second intermediate segments 58, 60 are separable in the longitudinal direction a relatively small distance X (see Figure 11), which is preferably in the range of 0.1mm to 0.8mm.
  • the first intermediate section 58 urges the deflection member 12 radially inward to deflect the forward seal 14 inwardly to allow removal of the second intermediate segment 60 over the forward seal 14.
  • the piston 10 can easily be removed from the tool with minimal damage. Also, separation of the first and second intermediate segments 58, 60 allows for upward deflection of the forward seal 14 during removal of the piston 10 from the tool 50.
  • the tool 50 is brought into a closed state defining a piston cavity, as illustrated in Figures 7 and 8.
  • segments of the tool 50 are brought into engagement with each other and forcibly held in position while plastic material is injected into the cavity under pressure.
  • Moulding of the piston 10 is performed using moulding parameters common to best practices in the art. Following injection of the plastic material, the piston is allowed to at least partially cure. In some embodiments, while the material is still elastically deformable, yet has sufficient strength to maintain its physical form the forward segment 54 and intermediate segments 58, 60 are removed. In other embodiments, the forward segment 54 and intermediate segments 58, 60 are removed when the material is mostly set. By removing the intermediate segments 58, 60 while the material is still relatively hot and still elastically deformable, portions of the piston 10 formed with an undercut can flex to permit passage of the intermediate sections 58, 60. Accordingly, the intermediate sections 58, 60 can be removed from the tool, thereby allowing the piston 10 to be ejected once additional cooling has occurred. Furthermore, the time of performing a moulding cycle can be greatly reduced so that manufacturing productivity can be improved.
  • the piston can be allowed to completely cure before removal from the tool.
  • the piston cavity is configured so that the deflection member 12 curves from its base toward its tip at the end which is forward in use, which allows the deflection member 12 to engage the intermediate section 58 during removal to cause the deflection member 12 to flex radially inwardly during removal of the intermediate section 58, causing the forward seal to be drawn inwardly so that intermediate section 60 can pass over the forward seal 14.
  • the deflection member 12 is shown as having first and second curves, it will be appreciated that a single curve may be provided.
  • the first and second intermediate segments 58, 60 are separated a small amount by advancing the first intermediate segment 58 a small distance X (see Figure 11), which is preferably in the range of 0.1 to 0.8mm. This causes the intermediate section to come into contact with the deflection member 12 and urge it radially inwardly while providing a space above the forward seal 14 which allows it to flex in the forward direction so that the second intermediate segment 60 can pass over the forward seal 14.
  • the first and second intermediate segments 58, 60 are advanced a distance Y (see Figure 11) together to allow removal of the formed piston 10 from the tool 50.
  • the tool 50 can then move into a expanded condition to allow removal or ejection of the piston 10.
  • the forward segment 54 and the first and second intermediate segments 58, 60 are moved further away from the piston and the central segments 52a, 52b separated.
  • the rearward segments 56a, 6b are then separated by either advancing or retracting either of segments 56a, 56b to allow a rearward portion to be removed from the tool 50.
  • a plurality of ejection pins may be used to assist in removal of the rearward portion of the piston 10 being advance from the tool 50.
  • the piston 10 may be formed without parting lines on the circumferential seals.
  • forming the piston in this way allows removal of the segments of the tool while the material is either cured or largely elastically deformable, which allows the piston to be formed with undercuts yet still removable from the tool without causing damage.
  • piston 30 or an outer peripheral portion 17 of piston 10 is formed.
  • the inner sealing portion 19 which includes a deflection member 18, a forward seal 20 and a rear seal 22, can be similarly formed using a internal core (not shown) also comprising a number of segments that are axially movable to form forward and rear seals 20, 22.
  • a central section of the inner sealing portion 19 may be formed with a plurality of transversely collapsible segments that, in the collapsed state, can be removed without damaging seals 20, 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

La présente invention concerne un piston (11) destiné à être utilisé dans une cartouche de distribution de fluides à plusieurs parties, le piston (11) étant moulé par injection et comportant des joints d'étanchéité (14) circonférentiels formés d'un seul tenant, le piston (11) étant moulé en l'absence d'une ligne de séparation longitudinale sur toute l'étendue des joints d'étanchéité (14). La présente invention concerne également un outil (10) servant à former un piston (11) comportant une pluralité de joints d'étanchéité (14) circonférentiels destinée à une utilisation dans une cartouche de distribution de fluides à plusieurs parties, l'outil (10) comprenant une pluralité de segments définissant ensemble une cavité de piston (11) correspondant à une périphérie extérieure dudit piston (11).
PCT/US2016/045224 2015-08-05 2016-08-03 Procédé et outil de moulage par injection WO2017023959A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NZ739038A NZ739038A (en) 2015-08-05 2016-08-03 Injection moulding tool and method
US15/746,272 US11305308B2 (en) 2015-08-05 2016-08-03 Injection molding tool and method
EP16756833.6A EP3331649B1 (fr) 2015-08-05 2016-08-03 Procédé et outil de moulage par injection

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AU2015903128A AU2015903128A0 (en) 2015-08-05 Tool for forming a cartridge piston and method
AU2015903128 2015-08-05
AU2016210598A AU2016210598B9 (en) 2015-08-05 2016-08-01 Tool for forming a cartridge piston and method
AU2016210598 2016-08-01

Publications (1)

Publication Number Publication Date
WO2017023959A1 true WO2017023959A1 (fr) 2017-02-09

Family

ID=56799538

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2016/045224 WO2017023959A1 (fr) 2015-08-05 2016-08-03 Procédé et outil de moulage par injection

Country Status (1)

Country Link
WO (1) WO2017023959A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107498754A (zh) * 2017-09-27 2017-12-22 奥克斯空调股份有限公司 一种出模机构、空调壳体模具及空调壳体
WO2019175361A1 (fr) * 2018-03-14 2019-09-19 Groupe Jbt Systeme de fabrication de pieces en polymere par injection et procede associe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4998461A (en) * 1988-03-08 1991-03-12 Nippon Air Brake Co., Ltd. Two-part plastic piston with excess resin receiving groove
WO1996026064A1 (fr) * 1995-02-21 1996-08-29 Siebolt Hettinga Appareil de moulage autonome et procede d'utilisation
FR2809229A1 (fr) * 2000-05-22 2001-11-23 St Microelectronics Sa Moule d'injection anti-bavure d'un materiau d'encapsulation d'une puce de circuits integres
EP2143662A1 (fr) * 2008-07-02 2010-01-13 Nordson Corporation Pistons avec un joint à lèvre et système de cartouche utilisant ces pistons

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4998461A (en) * 1988-03-08 1991-03-12 Nippon Air Brake Co., Ltd. Two-part plastic piston with excess resin receiving groove
WO1996026064A1 (fr) * 1995-02-21 1996-08-29 Siebolt Hettinga Appareil de moulage autonome et procede d'utilisation
FR2809229A1 (fr) * 2000-05-22 2001-11-23 St Microelectronics Sa Moule d'injection anti-bavure d'un materiau d'encapsulation d'une puce de circuits integres
EP2143662A1 (fr) * 2008-07-02 2010-01-13 Nordson Corporation Pistons avec un joint à lèvre et système de cartouche utilisant ces pistons

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107498754A (zh) * 2017-09-27 2017-12-22 奥克斯空调股份有限公司 一种出模机构、空调壳体模具及空调壳体
CN107498754B (zh) * 2017-09-27 2023-09-15 奥克斯空调股份有限公司 一种出模机构、空调壳体模具及空调壳体
WO2019175361A1 (fr) * 2018-03-14 2019-09-19 Groupe Jbt Systeme de fabrication de pieces en polymere par injection et procede associe

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