CN105563733A - Composite pipe injection mold and injection molding technique for five-layer composite pipe using same - Google Patents
Composite pipe injection mold and injection molding technique for five-layer composite pipe using same Download PDFInfo
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- CN105563733A CN105563733A CN201610141310.4A CN201610141310A CN105563733A CN 105563733 A CN105563733 A CN 105563733A CN 201610141310 A CN201610141310 A CN 201610141310A CN 105563733 A CN105563733 A CN 105563733A
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- adhesive layer
- composite pipe
- injection
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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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
- B29C45/1643—Making multilayered or multicoloured articles having a "sandwich" structure from at least three different materials or with at least four layers
-
- 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
- B29C45/0003—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor of successively moulded portions rigidly joined to each other
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
- B29C45/14491—Injecting material between coaxial articles, e.g. between a core and an outside sleeve for making a roll
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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
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
-
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76498—Pressure
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76551—Time
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/003—PET, i.e. poylethylene terephthalate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/006—PBT, i.e. polybutylene terephthalate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2223/00—Use of polyalkenes or derivatives thereof as reinforcement
- B29K2223/04—Polymers of ethylene
- B29K2223/08—Use of copolymers of ethylene as reinforcement
- B29K2223/086—EVOH, i.e. ethylene vinyl alcohol copolymer
Abstract
The invention discloses a composite pipe injection mold and an injection molding technique for a five-layer composite pipe using the same. By the adoption of the composite pipe injection mold and the injection molding technique, injection molding of each layer of the five-layer composite pipe is sequentially achieved from outside to inside. The composite pipe injection mold comprises a fixed mold. A movable mold is arranged below the fixed mold. The movable mold is provided with a support. The support is provided with a mold foot. The movable mold is provided with an outer molding cavity. A detachable molding core is installed in the outer molding cavity. An inner molding core body and a molding core body are arranged in the detachable molding core. The fixed mold is provided with a positioning sleeve. The positioning sleeve is provided with a sprue sleeve. The sprue sleeve is provided with a main flow pass. The mold foot is provided with an ejecting cushion plate. The ejecting cushion plate is provided with an ejecting plate. The ejecting plate is provided with a sprue puller and an ejector rod. A sprue pulling hole is formed in the molding core body. The upper end of the sprue puller stretches into the sprue pulling hole. The upper end of the ejector rod stretches to the bottom end of the inner molding cavity. A guiding device is arranged between the movable mold and the fixed mold. The ejecting plate is connected with a reset device. The composite pipe injection mold is simple in structure, the molding core body can be detached conveniently, operation is convenient, the injection molding technique is easy to adjust, injection molding of each layer of the composite pipe, especially a composite pipe with the thin inner wall, can be sequentially achieved from outside to inside, the injection molding quality is high, and the injection molding time is short.
Description
Technical field
The present invention relates to a kind of injecting products technical field, particularly relate to a kind of composite pipe injection mold and utilize this mold injection five layers of composite pipe technique.
Background technology
Current Multi-layer injection mold design mostly is from inside to outside injection moulding, this design for each layer uniform wall thickness or from inside to outside wall thickness do not have problems when thinning or internal layer wall thickness is not very thin gradually, but when internal layer wall thickness very thin (lower than 1mm) or very soft or wall thickness variation is excessive when, the easy all kinds of problems of injection moulding from inside to outside, outer injection pressure very easily causes internal layer thin-walled to produce distortion, thus affect the regularity of pipe fitting inner circle, pipe fitting injection moulding is of poor quality.And current Multi-layer injection mold complex structure, operation inconvenience during use, Shooting Technique not easily adjusts, injection time is long.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of structure simple, core dismounting is easy, save mold materials, easy to operate, Shooting Technique adjustment easily, can realize the injection moulding of each layer of composite pipe successively by ecto-entad, pipe fitting injection moulding quality is high, the composite pipe injection mold that injection time is short and utilize this mold injection five layers of composite pipe technique.
For solving the problems of the technologies described above, technical scheme of the present invention is: composite pipe injection mold, comprise cover half, the below of described cover half is provided with dynamic model, the below of described dynamic model is provided with support, the below of described support is provided with mould pin, described dynamic model is provided with outer die cavity, in described outer die cavity, detachable core is installed, described detachable core is provided with interior die cavity and core, is provided with positioning sleeve on the upside of described cover half, is arranged with sprue bush in described positioning sleeve, described sprue bush is provided with sprue, and described sprue is communicated with runner and cast gate; Be provided with above described mould pin and eject backing plate, described ejecting above backing plate is provided with liftout plate, described liftout plate is provided with sprue puller and push rod, the below correspondence described core being positioned at described sprue is provided with draws material hole, material hole internal upper part is drawn described in stretching into through described dynamic model in described sprue puller upper end, described push rod upper end extends described interior die cavity bottom through described dynamic model and described detachable core, and be provided with guider between described dynamic model and described cover half, described liftout plate is connected with resetting means.
As preferred technical scheme, described guider is that described dynamic model is provided with guide pillar, and described guide pillar inserts described cover half.
As preferred technical scheme, described resetting means is the release link that described liftout plate is provided with, and described release link upper end is passed described dynamic model and extended the bottom of described cover half.
As preferred technical scheme, described positioning sleeve is arranged on described cover half by connecting bolt; Described dynamic model, described support and described mould pin are installed together by connecting bolt; Describedly eject backing plate and described liftout plate is installed together by connecting bolt.
As preferred technical scheme, described runner to be arranged on described core and to be communicated with described interior die cavity.
As preferred technical scheme, described cast gate adopts spot pouring mouth or sub marine gate.
Composite pipe injection mold of the present invention, by the detachable core installed in outer die cavity, and detachable core is provided with interior die cavity and core, so can according to the requirement of Shooting Technique, core can be changed at any time, realize the injection moulding successively of each layer ecto-entad of composite pipe, the size of ecto-entad core moulding part reduces gradually, by ejecting backing plate and liftout plate, drive moving up and down of sprue puller and push rod, the composite pipe of injection moulding in the solidifying material in sprue and interior die cavity is released, realize the injection moulding of each layer of composite pipe, fixed half and moving half location and smooth matched moulds is realized by guider, push rod and sprue puller reset is realized by resetting means, structure is simple, core is changed easy, save mold materials, easy to operate, Shooting Technique adjustment easily, the injection moulding of each layer of composite pipe can be realized successively by ecto-entad, pipe fitting injection moulding quality is high, injection time is short.
Present invention also offers and utilize composite pipe injection mold injection moulding five layers of composite pipe technique, described five layers of composite pipe ecto-entad are followed successively by polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer, described polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer adopt together with polyethylene layer core, outer adhesive layer core, impervious barrier core, interior adhesive layer core and static conductive stratotype core be successively injection-moulded in by injection mold ecto-entad respectively, comprise step:
Step one, first adopt polyethylene layer core, polyethylene barrel temperature is 190-220 DEG C, injection pressure 70-85MPa, dwell pressure 60-67MPa, dwell time be 15-20s, cool time 25-35s, complete polyethylene layer injection moulding, obtain polyethylene layer pipe fitting;
Step 2, polyethylene layer core is replaced by outer adhesive layer core, step one is obtained pipe fitting and is inserted in location, binder materials barrel temperature is 210-235 DEG C, injection pressure 65-75MPa, dwell pressure 60-70MPa, dwell time be 10-15s, cool time 15-25s, complete the injection moulding of second layer adhesive layer, obtain polyethylene layer and adhesive layer pipe fitting;
Step 3, outer adhesive layer core is replaced by impervious barrier core, step 2 is obtained pipe fitting and is inserted in location, impervious material barrel temperature is 210-230 DEG C, injection pressure 75-85MPa, dwell pressure 65-75MPa, dwell time be 5-10s, cool time 10-15s, complete the injection moulding of third layer impervious barrier, obtain polyethylene layer, adhesive layer and impervious barrier pipe fitting;
Step 4, impervious barrier core is replaced by interior adhesive layer core, step 3 is obtained pipe fitting and is inserted in location, binder materials barrel temperature is 220-235 DEG C, injection pressure 65-75MPa, dwell pressure 60-70MPa, dwell time be 10-15s, cool time 15-25s, complete the 4th layer of adhesive layer injection moulding, obtain polyethylene layer, adhesive layer, impervious barrier and adhesive layer pipe fitting;
Step 5, interior adhesive layer core is replaced by static conductive stratotype core, step 4 is obtained pipe fitting and is inserted in location, conducting electrostatic materials barrel temperature is 185-225 DEG C, injection pressure 70-80MPa, dwell pressure 60-70MPa, dwell time be 20-25s, cool time 10-15s, complete the injection moulding of layer 5 static conductive layer, obtain polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer five layers of composite pipe.
Material conventional in current Injection Industry is all adopted, as binder materials can adopt PE-g-MAH, PP-g-MAH, PE-g-GMA, POE-g-MAH, EPDM-g-MAH, SBS-g-MAH or EVA etc. for the binder materials of adhesive layer, impervious barrier and static conductive layer described in injection moulding, impervious material and conducting electrostatic materials; Impervious material can adopt polyester material (PET), polyamide material (PA), ethylene-vinyl alcohol copolymer (EVOH); Conducting electrostatic materials can adopt static conductive polyamide material (PA), static conductive polyester material (PBT, PET), static conductive polythene material (PE), static conductive polypropylene material (PP) etc., and polyethylene can adopt extrusion grade high density polyethylene (HDPE) Midst density to be 950-960kg/m
3, melt index (MI) is all trades mark of 0.2-0.35g/10min, is no longer introduced herein.
As preferred technical scheme, all carry out drying for the material of adhesive layer, impervious barrier and static conductive layer described in injection moulding, baking temperature 85-100 DEG C, drying time 2-3 hour.
As preferred technical scheme, described static conductive layer thickness 0.3-1.0mm, impervious barrier thickness are at 0.5-1.0mm, adhesive layer thickness 0.25-1.0mm.
The present invention is by utilizing the composite pipe injection mold ecto-entad polyethylene layer of injection moulding five layers of composite pipe, adhesive layer, impervious barrier, adhesive layer and static conductive layer successively, by the difference injection moulding of polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer, avoid internal layer thin-walled and produce distortion, affect the phenomenon of pipe fitting inner circle regularity, pipe fitting injection moulding quality is high, injection time is short, easy to operate.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein:
Fig. 1 is the structural representation of composite pipe injection mold of the present invention;
Fig. 2 is five layers of composite pipe structural representation of injection moulding of the present invention.
In figure: 1-positioning sleeve; 2-composite pipe; 21-polyethylene layer, 22,24-adhesive layer; 23-impervious barrier; 25-static conductive layer; 3-dynamic model; The detachable core of 4-; 5-support; 6-liftout plate; 7-ejects backing plate; 8-mould pin; 9,12,16,17-connecting bolt; 10-cover half; 11-push rod; 13-guide pillar; 14-sprue puller; 15-release link; 18-sprue bush.
Embodiment
Below in conjunction with drawings and Examples, set forth the present invention further.In the following detailed description, the mode only by illustrating describes some one exemplary embodiment of the present invention.Undoubtedly, those of ordinary skill in the art can recognize, when without departing from the spirit and scope of the present invention, can revise by various different mode to described embodiment.Therefore, accompanying drawing is illustrative with being described in essence, instead of for limiting the protection domain of claim.
As shown in Figure 1, composite pipe injection mold, comprise cover half 10, the below of described cover half 10 is provided with dynamic model 3, the below of described dynamic model 3 is provided with support 5, the below of described support 5 is provided with mould pin 8, described dynamic model 3 is provided with outer die cavity, in described outer die cavity, detachable core 4 is installed, detachable core 4 can be arranged in described outer die cavity with connecting bolt 12 is dismountable, described detachable core 4 is provided with interior die cavity and core, positioning sleeve 1 is provided with on the upside of described cover half 10, sprue bush 18 is arranged with in described positioning sleeve 1, described sprue bush 18 is provided with sprue, described sprue is communicated with runner and cast gate, be provided with above described mould pin 8 and eject backing plate 7, described ejecting above backing plate 7 is provided with liftout plate 6, described liftout plate 6 is provided with sprue puller 14 and push rod 11, the below correspondence described core being positioned at described sprue is provided with draws material hole, material hole internal upper part is drawn described in stretching into through described dynamic model 3 in described sprue puller 14 upper end, described push rod 11 upper end extends described interior die cavity bottom through described dynamic model 3 and described detachable core 4, be provided with guider between described dynamic model 3 and described cover half 10, described liftout plate 6 is connected with resetting means.By the detachable core 4 installed in outer die cavity, and detachable core 4 is provided with interior die cavity and core, so can according to the requirement of Shooting Technique, core can be changed at any time, realize the injection moulding successively of composite pipe 2 each layers of ecto-entad, the size of ecto-entad core moulding part reduces gradually, by ejecting backing plate 7 and liftout plate 6, drive moving up and down of sprue puller 14 and push rod 11, the composite pipe 2 of injection moulding in the solidifying material in sprue and interior die cavity is released, realize the injection moulding of each layer of composite pipe 2, cover half 10 is realized and dynamic model 3 is located and smooth matched moulds by guider, push rod 11 is realized and sprue puller 14 resets by resetting means, structure is simple, core is changed easy, save mold materials, easy to operate, Shooting Technique adjustment easily.Described guider is that described dynamic model 3 is provided with guide pillar 13, and described guide pillar 13 inserts described cover half 10.Described resetting means is the release link 15 that described liftout plate 6 is provided with, and described release link 15 upper end is passed described dynamic model 3 and extended the bottom of described cover half 10.Described positioning sleeve 1 is arranged on described cover half 10 by connecting bolt 9; Described dynamic model 3, described support 5 and described mould pin 8 are installed together by connecting bolt 16; Describedly eject backing plate 7 and described liftout plate 6 is installed together by connecting bolt 17.Described runner to be arranged on described core and to be communicated with described interior die cavity.Described cast gate adopts spot pouring mouth or sub marine gate.
This composite pipe injection mold structure is suitable for all multi-layer injection molding pipe fittings, comprises straight-through, elbow, threeway, loose joint etc., is equally applicable to the injection moulding of other MULTILAYER COMPOSITE injecting products that ectonexine Wall-Thickness Difference is excessive or ectonexine soft durometer difference is excessive.
Embodiment one
As shown in Figure 2, utilize composite pipe injection mold injection moulding five layers of composite pipe technique, described five layers of composite pipe ecto-entad are followed successively by polyethylene layer 21, adhesive layer 22, impervious barrier 23, adhesive layer 24 and static conductive layer 25, described polyethylene layer 21, adhesive layer 22, impervious barrier 23, adhesive layer 24 and static conductive layer 25 adopt polyethylene layer core respectively, outer adhesive layer core, impervious barrier core, together with interior adhesive layer core and static conductive stratotype core are successively injection-moulded in by injection mold ecto-entad, obtain antiseepage static conductive five layers of composite pipe, comprise step:
Step one, first adopt polyethylene layer core, polyethylene barrel temperature is 190-220 DEG C, injection pressure 70-85MPa, dwell pressure 60-67MPa, dwell time be 15-20s, cool time 25-35s, complete polyethylene layer injection moulding, obtain polyethylene layer pipe fitting;
Step 2, polyethylene layer core is replaced by outer adhesive layer core, step one is obtained pipe fitting and is inserted in location, binder materials barrel temperature is 210-235 DEG C, injection pressure 65-75MPa, dwell pressure 60-70MPa, dwell time be 10-15s, cool time 15-25s, complete the injection moulding of second layer adhesive layer, obtain polyethylene layer and adhesive layer pipe fitting;
Step 3, outer adhesive layer core is replaced by impervious barrier core, step 2 is obtained pipe fitting and is inserted in location, impervious material barrel temperature is 210-230 DEG C, injection pressure 75-85MPa, dwell pressure 65-75MPa, dwell time be 5-10s, cool time 10-15s, complete the injection moulding of third layer impervious barrier, obtain polyethylene layer, adhesive layer and impervious barrier pipe fitting;
Step 4, impervious barrier core is replaced by interior adhesive layer core, step 3 is obtained pipe fitting and is inserted in location, binder materials barrel temperature is 220-235 DEG C, injection pressure 65-75MPa, dwell pressure 60-70MPa, dwell time be 10-15s, cool time 15-25s, complete the 4th layer of adhesive layer injection moulding, obtain polyethylene layer, adhesive layer, impervious barrier and adhesive layer pipe fitting;
Step 5, interior adhesive layer core is replaced by static conductive stratotype core, step 4 is obtained pipe fitting and is inserted in location, conducting electrostatic materials barrel temperature is 185-225 DEG C, injection pressure 70-80MPa, dwell pressure 60-70MPa, dwell time be 20-25s, cool time 10-15s, complete the injection moulding of layer 5 static conductive layer, obtain polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer five layers of composite pipe.
All carry out drying for the material of adhesive layer, impervious barrier and static conductive layer described in injection moulding, baking temperature 85-100 DEG C, drying time 2-3 hour.
Described static conductive layer thickness 0.3-1.0mm, impervious barrier thickness are at 0.5-1.0mm, adhesive layer thickness 0.25-1.0mm.And polyethylene layer wall thickness and can need to adopt 85% of specification wall thickness in GB " GB/T13663 feedwater polyethylene (PE) tubing " according to the requirement of product.
Embodiment two
As shown in Figure 2, utilize composite pipe injection mold injection moulding five layers of composite pipe technique, described five layers of composite pipe ecto-entad are followed successively by polyethylene layer 21, adhesive layer 22, impervious barrier 23, adhesive layer 24 and static conductive layer 25, described polyethylene layer 21, adhesive layer 22, impervious barrier 23, adhesive layer 24 and static conductive layer 25 adopt together with polyethylene layer core, outer adhesive layer core, impervious barrier core, interior adhesive layer core be successively injection-moulded in static conductive stratotype core ecto-entad respectively, obtain antiseepage static conductive five layers of composite pipe, comprise step:
Step one, first adopt polyethylene layer core, polyethylene barrel temperature is 220 DEG C, injection pressure 85MPa, dwell pressure 67MPa, dwell time be 20s, cool time 35s, complete polyethylene layer injection moulding, obtain polyethylene layer pipe fitting;
Step 2, polyethylene layer core is replaced by outer adhesive layer core, step one is obtained pipe fitting and is inserted in location, binder materials barrel temperature is 235 DEG C, injection pressure 75MPa, dwell pressure 70MPa, dwell time be 15s, cool time 25s, complete the injection moulding of second layer adhesive layer, obtain polyethylene layer and adhesive layer pipe fitting;
Step 3, outer adhesive layer core is replaced by impervious barrier core, step 2 is obtained pipe fitting and is inserted in location, impervious material barrel temperature is 230 DEG C, injection pressure 85MPa, dwell pressure 75MPa, dwell time be 10s, cool time 15s, complete the injection moulding of third layer impervious barrier, obtain polyethylene layer, adhesive layer and impervious barrier pipe fitting;
Step 4, impervious barrier core is replaced by interior adhesive layer core, step 3 is obtained pipe fitting and is inserted in location, binder materials barrel temperature is 235 DEG C, injection pressure 75MPa, dwell pressure 70MPa, dwell time be 15s, cool time 25s, complete the 4th layer of adhesive layer injection moulding, obtain polyethylene layer, adhesive layer, impervious barrier and adhesive layer pipe fitting;
Step 5, interior adhesive layer core is replaced by static conductive stratotype core, step 4 is obtained pipe fitting and is inserted in location, conducting electrostatic materials barrel temperature is 225 DEG C, injection pressure 80MPa, dwell pressure 70MPa, dwell time be 25s, cool time 15s, complete the injection moulding of layer 5 static conductive layer, obtain polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer five layers of composite pipe.
All drying is carried out, baking temperature 85-100 DEG C, 3 hours drying times for the material of adhesive layer, impervious barrier and static conductive layer described in injection moulding.
Described static conductive layer thickness 0.3-1.0mm, impervious barrier thickness are at 0.5-1.0mm, adhesive layer thickness 0.25-1.0mm.And polyethylene layer wall thickness and can need to adopt 85% of specification wall thickness in GB " GB/T13663 feedwater polyethylene (PE) tubing " according to the requirement of product.
Embodiment three
As shown in Figure 2, utilize composite pipe injection mold injection moulding five layers of composite pipe technique, described five layers of composite pipe ecto-entad are followed successively by polyethylene layer 21, adhesive layer 22, impervious barrier 23, adhesive layer 24 and static conductive layer 25, described polyethylene layer 21, adhesive layer 22, impervious barrier 23, adhesive layer 24 and static conductive layer 25 adopt together with polyethylene layer core, outer adhesive layer core, impervious barrier core, interior adhesive layer core be successively injection-moulded in static conductive stratotype core ecto-entad respectively, obtain antiseepage static conductive five layers of composite pipe, comprise step:
Step one, first adopt polyethylene layer core, polyethylene barrel temperature is 190 DEG C, injection pressure 70MPa, dwell pressure 60MPa, dwell time be 15s, cool time 25s, complete polyethylene layer injection moulding, obtain polyethylene layer pipe fitting;
Step 2, polyethylene layer core is replaced by outer adhesive layer core, step one is obtained pipe fitting and is inserted in location, binder materials barrel temperature is 210 DEG C, injection pressure 65MPa, dwell pressure 60MPa, dwell time be 10s, cool time 15s, complete the injection moulding of second layer adhesive layer, obtain polyethylene layer and adhesive layer pipe fitting;
Step 3, outer adhesive layer core is replaced by impervious barrier core, step 2 is obtained pipe fitting and is inserted in location, impervious material barrel temperature is 210 DEG C, injection pressure 75MPa, dwell pressure 65MPa, dwell time be 5s, cool time 10s, complete the injection moulding of third layer impervious barrier, obtain polyethylene layer, adhesive layer and impervious barrier pipe fitting;
Step 4, impervious barrier core is replaced by interior adhesive layer core, step 3 is obtained pipe fitting and is inserted in location, binder materials barrel temperature is 220 DEG C, injection pressure 65MPa, dwell pressure 60MPa, dwell time be 10s, cool time 15s, complete the 4th layer of adhesive layer injection moulding, obtain polyethylene layer, adhesive layer, impervious barrier and adhesive layer pipe fitting;
Step 5, interior adhesive layer core is replaced by static conductive stratotype core, step 4 is obtained pipe fitting and is inserted in location, conducting electrostatic materials barrel temperature is 185 DEG C, injection pressure 70MPa, dwell pressure 60MPa, dwell time be 20s, cool time 10s, complete the injection moulding of layer 5 static conductive layer, obtain polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer five layers of composite pipe.
All drying is carried out, baking temperature 85-100 DEG C, 2 hours drying times for the material of adhesive layer, impervious barrier and static conductive layer described in injection moulding.
Described static conductive layer thickness 0.3-1.0mm, impervious barrier thickness are at 0.5-1.0mm, adhesive layer thickness 0.25-1.0mm.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (9)
1. composite pipe injection mold, comprise cover half, it is characterized in that: the below of described cover half is provided with dynamic model, the below of described dynamic model is provided with support, the below of described support is provided with mould pin, described dynamic model is provided with outer die cavity, is provided with detachable core in described outer die cavity, and described detachable core is provided with interior die cavity and core, positioning sleeve is provided with on the upside of described cover half, be arranged with sprue bush in described positioning sleeve, described sprue bush is provided with sprue, and described sprue is communicated with runner and cast gate; Be provided with above described mould pin and eject backing plate, described ejecting above backing plate is provided with liftout plate, described liftout plate is provided with sprue puller and push rod, the below correspondence described core being positioned at described sprue is provided with draws material hole, material hole internal upper part is drawn described in stretching into through described dynamic model in described sprue puller upper end, described push rod upper end extends described interior die cavity bottom through described dynamic model and described detachable core, and be provided with guider between described dynamic model and described cover half, described liftout plate is connected with resetting means.
2. composite pipe injection mold as claimed in claim 1, is characterized in that: described guider is that described dynamic model is provided with guide pillar, and described guide pillar inserts described cover half.
3. composite pipe injection mold as claimed in claim 1, is characterized in that: described resetting means is the release link that described liftout plate is provided with, and described release link upper end is passed described dynamic model and extended the bottom of described cover half.
4. composite pipe injection mold as claimed in claim 1, is characterized in that: described positioning sleeve is arranged on described cover half by connecting bolt; Described dynamic model, described support and described mould pin are installed together by connecting bolt; Describedly eject backing plate and described liftout plate is installed together by connecting bolt.
5. composite pipe injection mold as claimed in claim 1, is characterized in that: described runner to be arranged on described core and to be communicated with described interior die cavity.
6. the composite pipe injection mold as described in claim 1,2,3,4 or 5, is characterized in that: described cast gate adopts spot pouring mouth or sub marine gate.
7. utilize composite pipe injection mold injection moulding five layers of composite pipe technique, it is characterized in that: described five layers of composite pipe ecto-entad are followed successively by polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer, described polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer adopt together with polyethylene layer core, outer adhesive layer core, impervious barrier core, interior adhesive layer core and static conductive stratotype core be successively injection-moulded in by injection mold ecto-entad respectively, comprise step:
Step one, first adopt polyethylene layer core, polyethylene barrel temperature is 190-220 DEG C, injection pressure 70-85MPa, dwell pressure 60-67MPa, dwell time be 15-20s, cool time 25-35s, complete polyethylene layer injection moulding, obtain polyethylene layer pipe fitting;
Step 2, polyethylene layer core is replaced by outer adhesive layer core, step one is obtained pipe fitting and is inserted in location, binder materials barrel temperature is 210-235 DEG C, injection pressure 65-75MPa, dwell pressure 60-70MPa, dwell time be 10-15s, cool time 15-25s, complete the injection moulding of second layer adhesive layer, obtain polyethylene layer and adhesive layer pipe fitting;
Step 3, outer adhesive layer core is replaced by impervious barrier core, step 2 is obtained pipe fitting and is inserted in location, impervious material barrel temperature is 210-230 DEG C, injection pressure 75-85MPa, dwell pressure 65-75MPa, dwell time be 5-10s, cool time 10-15s, complete the injection moulding of third layer impervious barrier, obtain polyethylene layer, adhesive layer and impervious barrier pipe fitting;
Step 4, impervious barrier core is replaced by interior adhesive layer core, step 3 is obtained pipe fitting and is inserted in location, binder materials barrel temperature is 220-235 DEG C, injection pressure 65-75MPa, dwell pressure 60-70MPa, dwell time be 10-15s, cool time 15-25s, complete the 4th layer of adhesive layer injection moulding, obtain polyethylene layer, adhesive layer, impervious barrier and adhesive layer pipe fitting;
Step 5, interior adhesive layer core is replaced by static conductive stratotype core, step 4 is obtained pipe fitting and is inserted in location, conducting electrostatic materials barrel temperature is 185-225 DEG C, injection pressure 70-80MPa, dwell pressure 60-70MPa, dwell time be 20-25s, cool time 10-15s, complete the injection moulding of layer 5 static conductive layer, obtain polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer five layers of composite pipe.
8. utilize composite pipe injection mold injection moulding five layers of composite pipe technique as claimed in claim 7, it is characterized in that: all carry out drying for the material of adhesive layer, impervious barrier and static conductive layer described in injection moulding, baking temperature 85-100 DEG C, drying time 2-3 hour.
9. utilize composite pipe injection mold injection moulding five layers of composite pipe technique as claimed in claim 7, it is characterized in that: described static conductive layer thickness 0.3-1.0mm, impervious barrier thickness are at 0.5-1.0mm, adhesive layer thickness 0.25-1.0mm.
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| CN105563733B (en) | 2017-08-25 |
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