CN105563733B - Composite pipe injection mold and utilization five layers of composite pipe technique of the mold injection - Google Patents

Composite pipe injection mold and utilization five layers of composite pipe technique of the mold injection Download PDF

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Publication number
CN105563733B
CN105563733B CN201610141310.4A CN201610141310A CN105563733B CN 105563733 B CN105563733 B CN 105563733B CN 201610141310 A CN201610141310 A CN 201610141310A CN 105563733 B CN105563733 B CN 105563733B
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China
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core
layer
adhesive layer
injection
composite pipe
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CN201610141310.4A
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CN105563733A (en
Inventor
杜华
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Shandong Juxing Plastic Industry Co Ltd
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Shandong Juxing Plastic Industry Co Ltd
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention discloses composite pipe injection mold and utilization five layers of composite pipe technique of the mold injection, ecto-entad is realized successively is provided with dynamic model below each layer injection of five layers of composite pipe, including cover half, cover half, dynamic model is provided with support, support is provided with support block, and dynamic model is provided with outer die cavity, and external form intracavitary installs detachable core, detachable core is provided with interior die cavity and core, cover half is provided with positioning sleeve, and positioning sleeve is provided with sprue bush, and sprue bush is provided with sprue；Support block is provided with liftout plate provided with ejection backing plate, ejection backing plate, and liftout plate is provided with sprue puller and push rod, core is provided with material hole is drawn, and drawing material hole is stretched into sprue puller upper end, and push rod upper end extends inner mold bottom of chamber end, there are guider, liftout plate connection resetting means between dynamic model and cover half.The present invention is simple in construction, and core dismounting is easy, and easy to operate, Shooting Technique is easily adjusted, and energy ecto-entad realizes each layer injection of composite pipe, the especially composite pipe relatively thin to inner layer wall successively, and injection quality is high, and injection time is short.

Description

Composite pipe injection mold and utilization five layers of composite pipe technique of the mold injection
Technical field
The present invention relates to a kind of injecting products technical field, more particularly to a kind of composite pipe injection mold and utilization Five layers of composite pipe technique of the mold injection.
Background technology
Current Multi-layer injection mold design is mostly molded from inside to outside, this design method for each layer uniform wall thickness or From inside to outside wall thickness be gradually thinned or internal layer wall thickness be not it is very thin in the case of there is no problem, but when internal layer wall thickness is very thin It is (be less than 1mm) or very soft or in the case that wall thickness variation is excessive, easy all kinds of problems, outer injection pressure are molded from inside to outside Internal layer thin-walled is easily caused to be deformed, so as to influence the regularity of pipe fitting inner circle, pipe fitting injection of poor quality.And current is more Layer injection mold structure is complicated, operates inconvenience when using, and it is long that Shooting Technique is difficult adjustment, injection time.
The content of the invention
The technical problems to be solved by the invention are：Simple in construction there is provided one kind, core dismounting is easy, has saved mould Material, easy to operate, Shooting Technique adjustment is easy, can ecto-entad realize the injection of each layer of composite pipe, pipe fitting note successively Polymer amount is high, injection time short composite pipe injection mold and utilizes five layers of composite pipe technique of the mold injection.
In order to solve the above technical problems, the technical scheme is that：Composite pipe injection mold, including cover half, it is described The lower section of cover half is provided with dynamic model, and the lower section of the dynamic model is provided with support, and the lower section of the support, which is provided with support block, the dynamic model, to be set There is outer die cavity, the external form intracavitary is provided with detachable core, and the detachable core is provided with interior die cavity and core, described fixed It is provided with the upside of mould in positioning sleeve, the positioning sleeve and is arranged with sprue bush, the sprue bush is provided with sprue, the sprue connects It is connected with runner and cast gate；Provided with ejection backing plate above the support block, liftout plate, the ejection are provided with above the ejection backing plate Plate, which is provided with sprue puller and push rod, the core to be located at below the sprue, is correspondingly provided with drawing material hole, the sprue puller Upper end stretches into described draw through the dynamic model and expects hole internal upper part, and the push rod upper end passes through the dynamic model and the detachable core Inner mold bottom of chamber end is extended, guider is provided between the dynamic model and the cover half, the liftout plate is connected with reset dress Put.
As preferred technical scheme, the guider is that the dynamic model is provided with guide pillar, and the guide pillar insertion is described Cover half.
As preferred technical scheme, the resetting means is the release link that the liftout plate is provided with, the release link Upper end passes through the dynamic model and extends the bottom of the cover half.
As preferred technical scheme, the positioning sleeve is arranged on the cover half by connecting bolt；The dynamic model, institute State support and the support block is installed together by connecting bolt；The ejection backing plate and the liftout plate are pacified by connecting bolt It is fitted together.
As preferred technical scheme, the runner is arranged on the core and connects the interior die cavity.
As preferred technical scheme, the cast gate uses spot pouring mouth or sub-marine gate.
The composite pipe injection mold of the present invention, the detachable core installed by external form intracavitary, and on detachable core Provided with interior die cavity and core, so can at any time change core according to the requirement of Shooting Technique, realize each layer of composite pipe by outer Inside injection successively, the size of ecto-entad core moulding part is gradually reduced, and by ejecting backing plate and liftout plate, is driven and is drawn Expect the up and down motion of bar and push rod, the composite pipe that the condensate in sprue and inner mold intracavitary are molded is released, and realizes multiple tube The injection of each layer of part, realizes fixed half and moving half positioning and smoothly matched moulds by guider, push rod is realized by resetting means Resetted with sprue puller, simple in construction, core changes easy, has saved mold materials, easy to operate, and Shooting Technique adjustment is easy, Can ecto-entad realize the injection of each layer of composite pipe successively, pipe fitting injection quality is high, and injection time is short.
Present invention also offers be molded five layers of composite pipe technique, five layers of multiple tube using composite pipe injection mold Part ecto-entad is followed successively by polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer, the polyethylene layer, bonding Oxidant layer, impervious barrier, adhesive layer and static conductive layer be respectively adopted polyethylene layer core, outer adhesive layer core, impervious barrier core, Together with interior adhesive layer core and static conductive stratotype core are successively molded by injection mold ecto-entad, including step：
Step one, first using polyethylene layer core, polyethylene barrel temperature is 190-220 DEG C, injection pressure 70- 85MPa, dwell pressure 60-67MPa, dwell time are 15-20s, cool time 25-35s, complete polyethylene layer injection, obtain poly- Pvdf layer pipe fitting；
Step 2, outer adhesive layer core is replaced by by polyethylene layer core, and step one is made into pipe fitting is inserted in positioning, is sticked Mixture material cartridge temperature is 210-235 DEG C, and injection pressure 65-75MPa, dwell pressure 60-70MPa, dwell time are 10- 15s, cool time 15-25s, complete the injection of second layer adhesive layer, obtain polyethylene layer and adhesive layer pipe fitting；
Step 3, impervious barrier core is replaced by by outer adhesive layer core, and step 2 is made into pipe fitting is inserted in positioning, antiseepage Material cartridge temperature is 210-230 DEG C, and injection pressure 75-85MPa, dwell pressure 65-75MPa, dwell time are 5-10s, cold But time 10-15s, completes the injection of third layer impervious barrier, obtains polyethylene layer, adhesive layer and impervious barrier pipe fitting；
Step 4, interior adhesive layer core is replaced by by impervious barrier core, and step 3 is made into pipe fitting is inserted in positioning, binds Agent material barrel temperature be 220-235 DEG C, injection pressure 65-75MPa, dwell pressure 60-70MPa, the dwell time be 10-15s, Cool time 15-25s, completes the 4th layer of adhesive layer injection, obtains polyethylene layer, adhesive layer, impervious barrier and adhesive layer pipe Part；
Step 5, static conductive stratotype core is replaced by by interior adhesive layer core, and step 4 is made into pipe fitting is inserted in positioning, leads Electrostatic material barrel temperature is 185-225 DEG C, and injection pressure 70-80MPa, dwell pressure 60-70MPa, dwell time are 20- 25s, cool time 10-15s, complete the layer injection of layer 5 static conductive, obtain polyethylene layer, adhesive layer, impervious barrier, adhesive layer With static conductive five layers of composite pipe of layer.
Binder materials, impervious material and static conductive material for being molded the adhesive layer, impervious barrier and static conductive layer Material is using the material commonly used in current Injection Industry, and such as binder materials can use PE-g-MAH, PP-g-MAH, PE-g- GMA, POE-g-MAH, EPDM-g-MAH, SBS-g-MAH or EVA etc.；Impervious material can use polyester material (PET), polyamides Amine material (PA), ethylene-vinyl alcohol copolymer (EVOH)；Conducting electrostatic materials can use static conductive polyamide material (PA), lead Electrostatic polyester material (PBT, PET), static conductive polythene material (PE), static conductive polypropylene material (PP) etc., and polyethylene can To use extrusion level high-density polyethylene Midst density as 950-960kg/m3, melt index (MI) is all of 0.2-0.35g/10min The trade mark, is no longer introduced herein.
As preferred technical scheme, the material for being molded the adhesive layer, impervious barrier and static conductive layer is carried out Dry, 85-100 DEG C of drying temperature, drying time 2-3 hour.
As preferred technical scheme, the static conductive thickness degree 0.3-1.0mm, impervious barrier thickness are in 0.5-1.0mm, glutinous Mixture layer thickness 0.25-1.0mm.
The present invention by using composite pipe injection mold ecto-entad be molded successively five layers of composite pipe polyethylene layer, Adhesive layer, impervious barrier, adhesive layer and static conductive layer, by polyethylene layer, adhesive layer, impervious barrier, adhesive layer and lead The injection respectively of electrostatic layer, it is to avoid internal layer thin-walled is deformed, influences the phenomenon of pipe fitting inner circle regularity, pipe fitting injection quality Height, injection time is short, easy to operate.
Brief description of the drawings
The following drawings is only intended to, in doing schematic illustration and explanation to the present invention, 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 that the present invention is molded.
In figure：1- positioning sleeves；2- composite pipes；21- polyethylene layers, 22,24- adhesive layers；23- impervious barriers；25- leads quiet Electric layer；3- dynamic models；The detachable cores of 4-；5- supports；6- liftout plates；7- ejects backing plate；8- support blocks；9th, 12,16,17- connection spiral shells Bolt；10- cover half；11- push rods；13- guide pillars；14- sprue pullers；15- release links；18- sprue bush.
Embodiment
With reference to the accompanying drawings and examples, the present invention is expanded on further.In the following detailed description, only explanation is passed through Mode describes some one exemplary embodiments of the present invention.Undoubtedly, one of ordinary skill in the art will recognize, In the case of without departing from the spirit and scope of the present invention, described embodiment can be repaiied with a variety of modes Just.Therefore, accompanying drawing and description are inherently illustrative, are not intended to limit the scope of the claims.
As shown in figure 1, composite pipe injection mold, including cover half 10, the lower section of the cover half 10 is provided with dynamic model 3, described The lower section of dynamic model 3 is provided with support 5, and the lower section of the support 5 is provided with support block 8, and the dynamic model 3 is provided with outer die cavity, the external form Intracavitary is provided with detachable core 4, and detachable core 4 can be detachably arranged in the external form intracavitary with connecting bolt 12, The detachable core 4 is provided with interior die cavity and core, and the upside of cover half 10, which is provided with positioning sleeve 1, the positioning sleeve 1, to be arranged There is sprue bush 18, the sprue bush 18 is provided with sprue, and the sprue is communicated with runner and cast gate；On the support block 8 Side is provided with liftout plate 6 provided with ejection backing plate 7, the top of ejection backing plate 7, and the liftout plate 6 is provided with sprue puller 14 and push rod 11, it is located on the core below the sprue and is correspondingly provided with drawing material hole, the upper end of sprue puller 14 passes through the dynamic model 3 Stretch into described draw and expect hole internal upper part, the upper end of push rod 11 extends the inner mold through the dynamic model 3 and the detachable core 4 Bottom of chamber end, is provided with guider between the dynamic model 3 and the cover half 10, the liftout plate 6 is connected with resetting means.By outer The detachable core 4 installed in die cavity, and detachable core 4 is provided with interior die cavity and core, so can be according to Shooting Technique It is required that, core can be changed at any time, realize the injection successively of 2 each layers of ecto-entad of composite pipe, ecto-entad core moulding part Size be gradually reduced, by ejecting backing plate 7 and liftout plate 6, the up and down motion of sprue puller 14 and push rod 11 is driven, by sprue Interior condensate and the composite pipe 2 of inner mold intracavitary injection are released, and realize the injection of each layer of composite pipe 2, real by guider Existing cover half 10 and dynamic model 3 are positioned and smooth matched moulds, realize that push rod 11 and sprue puller 14 reset by resetting means, structure letter Single, core changes easy, has saved mold materials, easy to operate, and Shooting Technique adjustment is easy.The guider is described dynamic Mould 3 is provided with guide pillar 13, and the guide pillar 13 inserts the cover half 10.The resetting means is answering that the liftout plate 6 is provided with Position bar 15, the upper end of release link 15 passes through the dynamic model 3 and extends the bottom of the cover half 10.The positioning sleeve 1 passes through even Connecting bolt 9 is arranged on the cover half 10；The dynamic model 3, the support 5 and the support block 8 are arranged on by connecting bolt 16 Together；The ejection backing plate 7 and the liftout plate 6 are installed together by connecting bolt 17.The runner is arranged in described On core and connect the interior die cavity.The cast gate uses spot pouring mouth or sub-marine gate.
The composite pipe injection mold structure is suitable for all multi-layer injection molding pipe fittings, including straight-through, elbow, threeway, loose joint Deng being equally applicable to the note of other MULTILAYER COMPOSITE injecting products that ectonexine Wall-Thickness Difference is excessive or ectonexine soft durometer difference is excessive Modeling.
Embodiment one
As shown in Fig. 2 using composite pipe injection mold be molded five layers of composite pipe technique, five layers of composite pipe by Polyethylene layer 21, adhesive layer 22, impervious barrier 23, adhesive layer 24 and static conductive layer 25, the polyethylene are followed successively by outside to inside Polyethylene layer core, outer binder is respectively adopted in layer 21, adhesive layer 22, impervious barrier 23, adhesive layer 24 and static conductive layer 25 Stratotype core, impervious barrier core, interior adhesive layer core and static conductive stratotype core are successively moulded in by injection mold ecto-entad Together, five layers of composite pipe of antiseepage static conductive, including step are obtained：
Step one, first using polyethylene layer core, polyethylene barrel temperature is 190-220 DEG C, injection pressure 70- 85MPa, dwell pressure 60-67MPa, dwell time are 15-20s, cool time 25-35s, complete polyethylene layer injection, obtain poly- Pvdf layer pipe fitting；
Step 2, outer adhesive layer core is replaced by by polyethylene layer core, and step one is made into pipe fitting is inserted in positioning, is sticked Mixture material cartridge temperature is 210-235 DEG C, and injection pressure 65-75MPa, dwell pressure 60-70MPa, dwell time are 10- 15s, cool time 15-25s, complete the injection of second layer adhesive layer, obtain polyethylene layer and adhesive layer pipe fitting；
Step 3, impervious barrier core is replaced by by outer adhesive layer core, and step 2 is made into pipe fitting is inserted in positioning, antiseepage Material cartridge temperature is 210-230 DEG C, and injection pressure 75-85MPa, dwell pressure 65-75MPa, dwell time are 5-10s, cold But time 10-15s, completes the injection of third layer impervious barrier, obtains polyethylene layer, adhesive layer and impervious barrier pipe fitting；
Step 4, interior adhesive layer core is replaced by by impervious barrier core, and step 3 is made into pipe fitting is inserted in positioning, binds Agent material barrel temperature be 220-235 DEG C, injection pressure 65-75MPa, dwell pressure 60-70MPa, the dwell time be 10-15s, Cool time 15-25s, completes the 4th layer of adhesive layer injection, obtains polyethylene layer, adhesive layer, impervious barrier and adhesive layer pipe Part；
Step 5, static conductive stratotype core is replaced by by interior adhesive layer core, and step 4 is made into pipe fitting is inserted in positioning, leads Electrostatic material barrel temperature is 185-225 DEG C, and injection pressure 70-80MPa, dwell pressure 60-70MPa, dwell time are 20- 25s, cool time 10-15s, complete the layer injection of layer 5 static conductive, obtain polyethylene layer, adhesive layer, impervious barrier, adhesive layer With static conductive five layers of composite pipe of layer.
Material for being molded the adhesive layer, impervious barrier and static conductive layer is dried, drying temperature 85-100 DEG C, drying time 2-3 hour.
The static conductive thickness degree 0.3-1.0mm, impervious barrier thickness are in 0.5-1.0mm, adhesive layer thickness 0.25- 1.0mm.And polyethylene layer wall thickness according to the requirement of product and can need to use national standard《GB/T13663 feedwater polyethylene (PE) tubing》The 85% of middle specification wall thickness.
Embodiment two
As shown in Fig. 2 using composite pipe injection mold be molded five layers of composite pipe technique, five layers of composite pipe by Polyethylene layer 21, adhesive layer 22, impervious barrier 23, adhesive layer 24 and static conductive layer 25, the polyethylene are followed successively by outside to inside Polyethylene layer core, outer binder is respectively adopted in layer 21, adhesive layer 22, impervious barrier 23, adhesive layer 24 and static conductive layer 25 Stratotype core, impervious barrier core, interior adhesive layer core obtain antiseepage together with being successively molded with static conductive stratotype core ecto-entad Five layers of composite pipe of static conductive, including step：
Step one, first using polyethylene layer core, polyethylene barrel temperature is 220 DEG C, injection pressure 85MPa, pressurize Pressure 67MPa, dwell time are 20s, cool time 35s, complete polyethylene layer injection, obtain polyethylene layer pipe fitting；
Step 2, outer adhesive layer core is replaced by by polyethylene layer core, and step one is made into pipe fitting is inserted in positioning, is sticked Mixture material cartridge temperature is 235 DEG C, and injection pressure 75MPa, dwell pressure 70MPa, dwell time are 15s, cool time 25s, completes the injection of second layer adhesive layer, obtains polyethylene layer and adhesive layer pipe fitting；
Step 3, impervious barrier core is replaced by by outer adhesive layer core, and step 2 is made into pipe fitting is inserted in positioning, antiseepage Material cartridge temperature be 230 DEG C, injection pressure 85MPa, dwell pressure 75MPa, the dwell time be 10s, cool time 15s, it is complete Into the injection of third layer impervious barrier, polyethylene layer, adhesive layer and impervious barrier pipe fitting are obtained；
Step 4, interior adhesive layer core is replaced by by impervious barrier core, and step 3 is made into pipe fitting is inserted in positioning, binds Agent material barrel temperature be 235 DEG C, injection pressure 75MPa, dwell pressure 70MPa, the dwell time be 15s, cool time 25s, The 4th layer of adhesive layer injection is completed, polyethylene layer, adhesive layer, impervious barrier and adhesive layer pipe fitting is obtained；
Step 5, static conductive stratotype core is replaced by by interior adhesive layer core, and step 4 is made into pipe fitting is inserted in positioning, leads Electrostatic material barrel temperature is 225 DEG C, and injection pressure 80MPa, dwell pressure 70MPa, dwell time are 25s, cool time 15s, completes the layer injection of layer 5 static conductive, obtains five layers of polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer Composite pipe.
Material for being molded the adhesive layer, impervious barrier and static conductive layer is dried, drying temperature 85-100 DEG C, 3 hours drying times.
The static conductive thickness degree 0.3-1.0mm, impervious barrier thickness are in 0.5-1.0mm, adhesive layer thickness 0.25- 1.0mm.And polyethylene layer wall thickness according to the requirement of product and can need to use national standard《GB/T13663 feedwater polyethylene (PE) tubing》The 85% of middle specification wall thickness.
Embodiment three
As shown in Fig. 2 using composite pipe injection mold be molded five layers of composite pipe technique, five layers of composite pipe by Polyethylene layer 21, adhesive layer 22, impervious barrier 23, adhesive layer 24 and static conductive layer 25, the polyethylene are followed successively by outside to inside Polyethylene layer core, outer binder is respectively adopted in layer 21, adhesive layer 22, impervious barrier 23, adhesive layer 24 and static conductive layer 25 Stratotype core, impervious barrier core, interior adhesive layer core obtain antiseepage together with being successively molded with static conductive stratotype core ecto-entad Five layers of composite pipe of static conductive, including step：
Step one, first using polyethylene layer core, polyethylene barrel temperature is 190 DEG C, injection pressure 70MPa, pressurize Pressure 60MPa, dwell time are 15s, cool time 25s, complete polyethylene layer injection, obtain polyethylene layer pipe fitting；
Step 2, outer adhesive layer core is replaced by by polyethylene layer core, and step one is made into pipe fitting is inserted in positioning, is sticked Mixture material cartridge temperature is 210 DEG C, and injection pressure 65MPa, dwell pressure 60MPa, dwell time are 10s, cool time 15s, completes the injection of second layer adhesive layer, obtains polyethylene layer and adhesive layer pipe fitting；
Step 3, impervious barrier core is replaced by by outer adhesive layer core, and step 2 is made into pipe fitting is inserted in positioning, antiseepage Material cartridge temperature is 210 DEG C, and injection pressure 75MPa, dwell pressure 65MPa, dwell time are 5s, cool time 10s, are completed Third layer impervious barrier is molded, and obtains polyethylene layer, adhesive layer and impervious barrier pipe fitting；
Step 4, interior adhesive layer core is replaced by by impervious barrier core, and step 3 is made into pipe fitting is inserted in positioning, binds Agent material barrel temperature be 220 DEG C, injection pressure 65MPa, dwell pressure 60MPa, the dwell time be 10s, cool time 15s, The 4th layer of adhesive layer injection is completed, polyethylene layer, adhesive layer, impervious barrier and adhesive layer pipe fitting is obtained；
Step 5, static conductive stratotype core is replaced by by interior adhesive layer core, and step 4 is made into pipe fitting is inserted in positioning, leads Electrostatic material barrel temperature is 185 DEG C, and injection pressure 70MPa, dwell pressure 60MPa, dwell time are 20s, cool time 10s, completes the layer injection of layer 5 static conductive, obtains five layers of polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer Composite pipe.
Material for being molded the adhesive layer, impervious barrier and static conductive layer is dried, drying temperature 85-100 DEG C, 2 hours drying times.
The static conductive thickness degree 0.3-1.0mm, impervious barrier thickness are in 0.5-1.0mm, adhesive layer thickness 0.25- 1.0mm。
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (9)

1. composite pipe injection mold, including cover half, it is characterised in that：The lower section of the cover half is provided with dynamic model, the dynamic model Lower section is provided with support, and the lower section of the support is provided with support block, and the dynamic model is provided with outer die cavity, and the external form intracavitary is provided with can Core is dismantled, the detachable core is provided with the upside of interior die cavity and core, the cover half and is provided with positioning sleeve, the positioning sleeve Sprue bush is arranged with, the sprue bush is provided with sprue, and the sprue is communicated with runner and cast gate；Above the support block Provided with ejection backing plate, liftout plate is provided with above the ejection backing plate, the liftout plate is provided with sprue puller and push rod, the core Upper that drawing material hole is correspondingly provided with below the sprue, the drawing material hole is stretched into the sprue puller upper end through the dynamic model Internal upper part, the push rod upper end extends inner mold bottom of chamber end through the dynamic model and the detachable core, the dynamic model and Guider is provided between the cover half, the liftout plate is connected with resetting means.
2. composite pipe injection mold as claimed in claim 1, it is characterised in that：The guider is to be set on the dynamic model There is guide pillar, the guide pillar inserts the cover half.
3. composite pipe injection mold as claimed in claim 1, it is characterised in that：The resetting means is on the liftout plate The release link being provided with, the release link upper end passes through the dynamic model and extends the bottom of the cover half.
4. composite pipe injection mold as claimed in claim 1, it is characterised in that：The positioning sleeve is installed by connecting bolt On the cover half；The dynamic model, the support and the support block are installed together by connecting bolt；It is described ejection backing plate and The liftout plate is installed together by connecting bolt.
5. composite pipe injection mold as claimed in claim 1, it is characterised in that：The runner is arranged on the core And connect the interior die cavity.
6. the composite pipe injection mold as described in claim 1,2,3,4 or 5, it is characterised in that：The cast gate uses hole irrigation Mouth or sub-marine gate.
7. it is molded five layers of composite pipe technique using composite pipe injection mold, it is characterised in that：Five layers of composite pipe by Polyethylene layer, adhesive layer, impervious barrier, adhesive layer and static conductive layer, the polyethylene layer, binder are followed successively by outside to inside Polyethylene layer core is respectively adopted in layer, impervious barrier, adhesive layer and static conductive layer, outer adhesive layer core, impervious barrier core, interior Together with adhesive layer core and static conductive stratotype core are successively molded by injection mold ecto-entad, including step：
Step one, first using polyethylene layer core, polyethylene barrel temperature is 190-220 DEG C, injection pressure 70-85MPa, guarantor Pressure pressure 60-67MPa, dwell time are 15-20s, cool time 25-35s, complete polyethylene layer injection, obtain polyethylene layer pipe Part；
Step 2, outer adhesive layer core is replaced by by polyethylene layer core, and step one is made into pipe fitting is inserted in positioning, binder Material cartridge temperature is 210-235 DEG C, and injection pressure 65-75MPa, dwell pressure 60-70MPa, dwell time are 10-15s, cold But time 15-25s, completes the injection of second layer adhesive layer, obtains polyethylene layer and adhesive layer pipe fitting；
Step 3, impervious barrier core is replaced by by outer adhesive layer core, and step 2 is made into pipe fitting is inserted in positioning, impervious material Barrel temperature is 210-230 DEG C, when injection pressure 75-85MPa, dwell pressure 65-75MPa, dwell time are 5-10s, cooling Between 10-15s, complete the injection of third layer impervious barrier, obtain polyethylene layer, adhesive layer and impervious barrier pipe fitting；
Step 4, interior adhesive layer core is replaced by by impervious barrier core, and step 3 is made into pipe fitting is inserted in positioning, binder material It is 220-235 DEG C to expect barrel temperature, and injection pressure 65-75MPa, dwell pressure 60-70MPa, dwell time are 10-15s, cooling Time 15-25s, completes the 4th layer of adhesive layer injection, obtains polyethylene layer, adhesive layer, impervious barrier and adhesive layer pipe fitting；
Step 5, static conductive stratotype core is replaced by by interior adhesive layer core, and step 4 is made into pipe fitting is inserted in positioning, static conductive Material cartridge temperature is 185-225 DEG C, and injection pressure 70-80MPa, dwell pressure 60-70MPa, dwell time are 20-25s, cold But time 10-15s, completes the layer injection of layer 5 static conductive, obtains polyethylene layer, adhesive layer, impervious barrier, adhesive layer and lead quiet Five layers of composite pipe of electric layer.
8. it is molded five layers of composite pipe technique using composite pipe injection mold as claimed in claim 7, it is characterised in that：With It is dried in the material for being molded the adhesive layer, impervious barrier and static conductive layer, 85-100 DEG C of drying temperature, drying time 2-3 hours.
9. it is molded five layers of composite pipe technique using composite pipe injection mold as claimed in claim 7, it is characterised in that：Institute Static conductive thickness degree 0.3-1.0mm, impervious barrier thickness are stated in 0.5-1.0mm, adhesive layer thickness 0.25-1.0mm.
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