CN107253313A - A kind of die sinking method of gas-assist mold - Google Patents
A kind of die sinking method of gas-assist mold Download PDFInfo
- Publication number
- CN107253313A CN107253313A CN201710289644.0A CN201710289644A CN107253313A CN 107253313 A CN107253313 A CN 107253313A CN 201710289644 A CN201710289644 A CN 201710289644A CN 107253313 A CN107253313 A CN 107253313A
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- China
- Prior art keywords
- discharge
- regulating block
- discharge regulating
- latch segment
- gas
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
-
- 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
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/67—Mould opening, closing or clamping devices hydraulic
Abstract
The invention discloses a kind of die sinking method of gas-assist mold, comprise the following steps：It is molded and tentatively cools down；Air blowing agent material；Product pressurize is cooled down；The demoulding.Wherein, the folding of discharge envelope pin is controlled by envelope pin cylinder；Pulling and pushing for discharge regulating block is controlled by discharge regulating block control cylinder, and the space of discharge regulating block insertion end under matched moulds state opposing seal.The beneficial effects of the invention are as follows：The air-blowing quantity of compressed nitrogen can accurately be controlled, so as to so that extrusion material quantity keep it is constant, be conducive to the stabilization of product quality.
Description
Technical field
The invention belongs to plastic mould field, the die sinking method of specifically a kind of gas-assist mold.
Background technology
The production method of plastic cement products has a blow moulding and injection moulding, and blow moulding, entity knot are used the product of hollow-core construction more
Injection moulding being used the product of structure more.For the Shooting Technique of some heavy wall products, need to expend big content of starting materials in its heavy wall
To fill.As a result, thick wall part cooling is slow, injection time extension, production efficiency reduction, cost of material is higher,
Local contraction is uneven to cause product size deviation larger.To solve these problems, gas-assisted injection molding method is occurred in that, by thick wall part
Raw material is first full of, compressed nitrogen is reinjected after the part cooling of contact mould, the still uncooled raw material extrusion heavy wall in part makes
Heavy wall turns into hollow body, can quickly cool down, can improve production efficiency, raw material can be saved again.Such as Chinese patent literature
CN202572847U, was disclosed " gas-assist mold and the injection mold comprising the gas-assist mold " on December 5th, 2012, including
Front template, the preceding mould mold insert of the auxiliary structure of the gas being fixedly arranged in the front template, rear pattern plate and the gas that is fixedly arranged in rear pattern plate are auxiliary
Preceding mould mold insert in the rear mold mold insert of structure, front template passes through injection with the rear mold mold insert in rear pattern plate on injection machine after matched moulds
Shaping, for shaped article wall thickness very thick die cavity.The traditional scheme of the similar patent, generally existing compressed nitrogen control not
Accurately, the problems such as extrusion raw material is non-constant, wall thickness numerical fluctuations are big, have impact on the quality of final products.
The content of the invention
The technical problem to be solved in the invention is that existing gas-assist mold is difficult to the air blowing of accurate control compressed nitrogen
Amount, so as to provide a kind of die sinking method of gas-assist mold, can accurately control the air-blowing quantity of compressed nitrogen, so as to so that extrusion
Material quantity keeps constant, is conducive to the stabilization of product quality.
To achieve these goals, the present invention is adopted the following technical scheme that：A kind of die sinking method of gas-assist mold, including such as
Lower step：
It is molded and tentatively cools down：Discharge regulating block is in insertion position, and matched moulds is molded to mould, by the heavy section of product
Divide and filled with the raw material of thawing, the raw material of contact mould is tentatively cooled down；
Air blowing agent material：The outlet side of discharge envelope pin is opened on thick wall part, and compressed gas is injected for thick wall part by discharge envelope
Body, and continue to keep air pressure, the raw material of isometric thawing is extruded into inserting to discharge regulating block out of mould along extrusion manifold
Enter in the end space in direction；Synchronizing moving is to insertion position while discharge seals needle insufflation for discharge regulating block, and after moving
The spatial variations amount of the insertion end of discharge regulating block is consistent with the volume for the raw material that product thick wall part is extruded；
Product pressurize is cooled down：Make the remaining uncolled part cooling and solidifying of product；
The demoulding：Discharge envelope pin closure, stops compressed gas injection, die sinking, while discharge regulating block is reset to insertion position, will squeeze
The raw material ejection gone out；
Wherein, the folding of discharge envelope pin is controlled by envelope pin cylinder；Discharge regulating block is pulled and pushed by discharge regulating block control cylinder
Control, and the space of discharge regulating block insertion end under matched moulds state opposing seal.
In the technical program, an envelope pin cylinder is designed with, for controlling discharge to seal pin, accurate folding is realized.It is logical
Cross solenoid valve control compressed air, it is possible to the action of accurate control envelope pin cylinder, and then the accurate folding for controlling discharge to seal pin
And air-blowing quantity, so as to be accurately controlled the volume that raw material is extruded out of thick wall part mould, it is possible to be accurately controlled heavy wall
Partial materials, so that the thickness of stable control thick wall part, it is ensured that the quality of product.Further, needle blow is sealed in discharge
While gas, discharge regulating block is mobile to extraction side.Because the mobile space of discharge regulating block is relatively closed, therefore in row
After material regulating block is moved to withdrawal end, the space of insertion end forms low-pressure area, to the raw material shape for the thawing extruded out of mould
Raw material, is transferred to after the movement of discharge regulating block by the pressure formed into suction, the compressed gas for coordinating discharge envelope needle blow to enter jointly
In the space of insertion end.In order to reach the requirement accurately controlled, move to after discharge regulating block moves to withdrawal end, insertion end is used for
The space of raw material is accommodated, its volume is just adapted to the volume that design needs the raw material of extrusion, makes the control of raw material extrusion capacity accurate
Du Genggao., it is necessary to again by solenoid valve control compressed air, make envelope pin cylinder close discharge envelope pin, stop in die sinking step
Only compressed gas is injected, and then molds again, while discharge regulating block is reset to insertion end, discharge regulating block will be deposited in after extrusion
The raw material ejection of insertion end, realizes product and extrusion raw material while being separated with mould structure.
Preferably, the piston movement direction of the discharge regulating block control cylinder and the reciprocating motion side of discharge regulating block
Angle is provided between；Discharge regulating block control cylinder control discharge adjusts latch segment along discharge regulating block control cylinder piston
The direction of motion is moved back and forth, and discharge regulation latch segment is provided with guide groove, corresponding on discharge regulating block to be provided with feather key, both
Be combined together can oblique movement, the piston movement direction of discharge regulating block control cylinder is converted into the reciprocal of discharge regulating block
The direction of motion.It is, in order to avoid oil cylinder directly drives to discharge regulating block, to make discharge regulating block using the purpose of present design
Movement it is more linear smoother, with discharge seal pin blowing action coordinate it is more perfect.Increase by one is needed for this by oil cylinder direct
The discharge regulation latch segment of control is connect, guide groove is designed with discharge regulation latch segment, what is be adapted on discharge regulating block sets
In respect of feather key, the direction of motion in the direction and cylinder piston motion direction and discharge regulating block of guide groove has angle, works as row
When material regulation latch segment is moved by hydraulic oil cylinder driving, feather key is interacted with guide groove, and discharge is adjusted to the motion of latch segment
Motion of the discharge regulating block on other direction is converted into, in this change, because motion of the feather key in guide groove is interval
Length be considerably longer than the interval length of motion of discharge regulating block, therefore equivalent to being exaggerated the control moved to discharge regulating block
Accuracy processed, contributes to the smoother more stable motion of discharge regulating block, contributes in the thick wall part mould to product to extrude
Raw material extrusion capacity and extruded velocity control.
Preferably, also including discharge adjusts latch segment bottom plate, discharge regulation latch segment stopper slot which is provided with；Discharge is adjusted
That saves latch segment adaptation adjusts latch segment bottom plate positive stop key, the bearing of trend and length of discharge regulation latch segment stopper slot provided with discharge
Spend consistent with length with the discharge direction of motion for adjusting latch segment.Stopper slot, discharge are devised on discharge regulation latch segment bottom plate
It is corresponding on regulation latch segment to devise positive stop key, form the spacing guiding mechanism that keyway coordinates, it can be ensured that discharge regulation lock
The moving direction of tight block and in the distance of bearing of trend for being limited in stopper slot all the time, so as to ensure discharge regulating block
Mobile stabilization it is smooth.
Preferably, the discharge regulating block control cylinder can be substituted with cylinder, linear bearing.Possess in dynamic condition
In the case of, oil cylinder can also use cylinder, linear bearing etc. to possess the equipment replacement of linear reciprocation function.
In summary, the beneficial effects of the invention are as follows：The air-blowing quantity of compressed nitrogen can be accurately controlled, so as to so as to squeeze
Go out material quantity and keep constant, be conducive to the stabilization of product quality.
Brief description of the drawings
Fig. 1 is the structural representation when present invention is combined together with product.
Fig. 2 is that Fig. 1 removes the structural representation after product.
Fig. 3 is Fig. 2 exploded sketch.
Wherein：1 discharge regulating block, 2 products, 3 discharges envelope pin, 4 envelope pin cylinders, 5 discharge regulating block control cylinders, 6 discharges
Adjust latch segment, 7 discharges regulation latch segment bottom plate, 11 feather keys, 61 guide grooves, 71 discharges regulation latch segment stopper slot.
Embodiment
The present invention will be further described with embodiment below in conjunction with the accompanying drawings.This example is a kind of gas-assist mold
Die sinking method, is applied in the Shooting Technique of the product with thick wall part.
As shown in Figure 1, Figure 2, Figure 3 shows, the die sinking method of the gas-assist mold of this example, comprises the following steps：
It is molded and tentatively cools down：Discharge regulating block 1 is in the top that insertion position is diagram, and matched moulds is molded to mould, will
The thick wall part of product 2 is filled with the raw material melted, the raw material of contact mould is tentatively cooled down；
Air blowing agent material：The outlet side of discharge envelope pin 3 is opened on thick wall part, and compressed gas is injected for thick wall part by discharge envelope
Body, this example selection be high pressure nitrogen, and continue keep air pressure, by the raw material of isometric thawing out of mould along extrusion manifold
In extrusion to the end space of the top of discharge regulating block；Discharge regulating block discharge seal needle insufflation while synchronizing moving to insert
Enter position, that is, the lower section illustrated, and the spatial variations amount of the upper end of discharge regulating block is extruded with product thick wall part after moving
The volume of raw material is consistent；
Product pressurize is cooled down：Make the remaining uncolled part cooling and solidifying of product；
The demoulding：Discharge envelope pin closure, stop compressed gas injection, die sinking, at the same discharge regulating block be reset to insertion position i.e. on
Side, the raw material of extrusion is ejected；
Wherein, control of the folding of discharge envelope pin by envelope pin cylinder 4；Discharge regulating block is pulled and pushed by discharge regulating block control cylinder
5 control, and the space of discharge regulating block upper end under matched moulds state opposing seal；Seal the connection compression of pin cylinder empty
Gas, is accurately controlled to seal the action of pin cylinder by magnetic valve.
In this example, the piston movement direction of discharge regulating block control cylinder is level to and the reciprocal fortune of discharge regulating block
Dynamic direction is above-below direction, therefore is also devised with discharge regulation latch segment 6 as movement transitions part.Discharge regulating block control oil
The direction of motion of the cylinder control discharge regulation latch segment along discharge regulating block control cylinder piston is moved back and forth.Discharge adjusts latch segment
Guide groove 61 is provided with, the direction of guide groove is oblique, and the shrinkage direction of control cylinder piston is higher, control cylinder piston
Direction of extension it is relatively low；On discharge regulating block it is corresponding be provided with feather key 11, both be combined together can oblique movement, by discharge
The horizontal movement direction of regulating block control cylinder piston is converted into the direction that pumps of discharge regulating block.
In order to which the horizontal movement progress that latch segment is preferably adjusted to discharge is spacing, discharge regulation locking is additionally provided with this example
Block bottom plate 7.Discharge adjusts latch segment bottom plate and is made up of 3 pieces of continuous fixed blocks being fixed in lower template, wherein two pieces of upper designs
There is the continuous dead slot of horizontal direction, form discharge regulation latch segment stopper slot 71；And the bottom adaptation of discharge regulation latch segment
Discharge regulation latch segment bottom plate positive stop key is designed with, positive stop key coordinates to be slided in stopper slot, discharge is adjusted the past of latch segment
The guiding of the strictly limited position groove of distance and direction moved again and spacing.
In the case where dynamic condition possesses, oil cylinder can also use cylinder, linear bearing etc. to possess linear reciprocation function
Equipment replacement.
Gas-assist mold is controlled using this method, the air-blowing quantity of compressed nitrogen can be accurately controlled, so as to so that extrusion is former
Doses keeps constant, is conducive to the stabilization of product quality.
Claims (4)
1. a kind of die sinking method of gas-assist mold, it is characterized in that, comprise the following steps：
It is molded and tentatively cools down：Discharge regulating block（1）In insertion position, matched moulds is molded to mould, by product（2）'s
Thick wall part is filled with the raw material melted, the raw material of contact mould is tentatively cooled down；
Air blowing agent material：Discharge seals pin（3）Outlet side be opened on thick wall part, by discharge envelope for thick wall part inject compress
Gas, and continue to keep air pressure, the raw material of isometric thawing is extruded to discharge regulating block out of mould along extrusion manifold
In the end space of direction of insertion；Discharge regulating block synchronizing moving while discharge seals needle insufflation is and mobile to insertion position
The spatial variations amount of the insertion end of discharge regulating block is consistent with the volume for the raw material that product thick wall part is extruded afterwards；
Product pressurize is cooled down：Make the remaining uncolled part cooling and solidifying of product；
The demoulding：Discharge envelope pin closure, stops compressed gas injection, die sinking, while discharge regulating block is reset to insertion position, will squeeze
The raw material ejection gone out；
Wherein, the folding of discharge envelope pin is by envelope pin cylinder（4）Control；Pulling and pushing for discharge regulating block is controlled oil by discharge regulating block
Cylinder（5）Control, and the space of discharge regulating block insertion end under matched moulds state opposing seal.
2. a kind of die sinking method of gas-assist mold according to claim 1, it is characterized in that, the discharge regulating block control oil
Angle is provided between the piston movement direction of cylinder and the vibration-direction of discharge regulating block；Discharge regulating block control cylinder is controlled
Discharge adjusts latch segment（6）Moved back and forth along the direction of motion of discharge regulating block control cylinder piston, on discharge regulation latch segment
Provided with guide groove（61）, it is corresponding on discharge regulating block to be provided with feather key（11）, both be combined together can oblique movement, will arrange
The piston movement direction of material regulating block control cylinder is converted into the vibration-direction of discharge regulating block.
3. a kind of die sinking method of gas-assist mold according to claim 2, it is characterized in that, in addition to discharge regulation latch segment
Bottom plate（7）, which is provided with discharge regulation latch segment stopper slot（71）；Being adjusted provided with discharge for discharge regulation latch segment adaptation is locked
Block bottom plate positive stop key, bearing of trend and length and the discharge of discharge regulation latch segment stopper slot adjust the direction of motion of latch segment with
Length is consistent.
4. a kind of die sinking method of gas-assist mold according to claim 1 or 2 or 3, it is characterized in that, the discharge regulating block
Control cylinder can be substituted with cylinder, linear bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710289644.0A CN107253313A (en) | 2017-04-27 | 2017-04-27 | A kind of die sinking method of gas-assist mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710289644.0A CN107253313A (en) | 2017-04-27 | 2017-04-27 | A kind of die sinking method of gas-assist mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107253313A true CN107253313A (en) | 2017-10-17 |
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ID=60027285
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710289644.0A Pending CN107253313A (en) | 2017-04-27 | 2017-04-27 | A kind of die sinking method of gas-assist mold |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109366911A (en) * | 2018-12-17 | 2019-02-22 | 启东市亿方密封科技有限公司 | A kind of pick-off unit and its pickup method for injecting products |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1836880A (en) * | 2005-03-21 | 2006-09-27 | 北京中拓机械有限责任公司 | Method for forming hollow plastic products and device therefor |
| CN201900705U (en) * | 2010-07-21 | 2011-07-20 | 台州市新立模塑有限公司 | Air-assisted plastic cutting mechanism for storage box cover die of automobile instrument panel |
| CN104552745A (en) * | 2015-01-31 | 2015-04-29 | 长春中拓模塑科技有限公司 | Injection molding system for thermoplastic resin hollow tube products |
| CN106346695A (en) * | 2016-08-31 | 2017-01-25 | 江苏新泉汽车饰件股份有限公司 | Technology for forming instrument board with hollow structure |
-
2017
- 2017-04-27 CN CN201710289644.0A patent/CN107253313A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1836880A (en) * | 2005-03-21 | 2006-09-27 | 北京中拓机械有限责任公司 | Method for forming hollow plastic products and device therefor |
| CN201900705U (en) * | 2010-07-21 | 2011-07-20 | 台州市新立模塑有限公司 | Air-assisted plastic cutting mechanism for storage box cover die of automobile instrument panel |
| CN104552745A (en) * | 2015-01-31 | 2015-04-29 | 长春中拓模塑科技有限公司 | Injection molding system for thermoplastic resin hollow tube products |
| CN106346695A (en) * | 2016-08-31 | 2017-01-25 | 江苏新泉汽车饰件股份有限公司 | Technology for forming instrument board with hollow structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109366911A (en) * | 2018-12-17 | 2019-02-22 | 启东市亿方密封科技有限公司 | A kind of pick-off unit and its pickup method for injecting products |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 315408 788 Tanjialing West Road, Yuyao City, Ningbo City, Zhejiang Province Applicant after: Shentong Science and Technology Group Co., Ltd. Address before: 315408 788 Tanjialing West Road, Yuyao City, Ningbo City, Zhejiang Province Applicant before: Ningbo Shentong Mould & Plastic Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171017 |