CN100548619C - A kind of injection transfer moulding method of thermosetting plastics and mould thereof - Google Patents
A kind of injection transfer moulding method of thermosetting plastics and mould thereof Download PDFInfo
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- CN100548619C CN100548619C CNB2006101187913A CN200610118791A CN100548619C CN 100548619 C CN100548619 C CN 100548619C CN B2006101187913 A CNB2006101187913 A CN B2006101187913A CN 200610118791 A CN200610118791 A CN 200610118791A CN 100548619 C CN100548619 C CN 100548619C
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Abstract
The invention provides a kind of injection transfer moulding method and mould thereof of thermosetting plastics, belong to the mechanical chemical industry technical field.The injection transfer moulding method that it has solved existing thermosetting plastics exists remaining waste material in runner and the cast gate, waste serious problem.The injection transfer moulding method of this thermosetting plastics may further comprise the steps: A, fusion; B, preliminary matched moulds; C, injection; D, pressurization matched moulds; E, crosslinking curing, die sinking ejects product behind the crosslinking curing.The present invention also provides this thermoset plastic forming method used mould, it comprises upper die and lower die and guiding mechanism, between counterdie tube and lower bolster, be provided with an ejecting mechanism that is used to eject product, lateral surface in described upper mold core and lower mold core contact position is provided with edge ring, and edge ring, upper mold core, lower mold core three surround the reinforced chamber of mould.This method stock utilization height, production efficiency height, the long service life of this mould, compact conformation, easy to process.
Description
Technical field
The present invention relates to a kind of forming method of plastics and used mould thereof, be aimed at a kind of forming method of thermosetting plastics and used mould thereof.
Background technology
Thermosetting plastics applies in cooker, electrical equipment, the auto parts machinery widely at present.The production technology of thermosets has only two kinds usually, and a kind of is compression moulding, and another kind is injection moulding, this two kinds of each have their own advantages of technology and shortcoming.Compression moulding is to join after the raw material weighing in the reinforced chamber of compacting tool set, the closed heating of mould, and the material melt-flow, equipment further pressurizes, the crosslinking curing moulding of being heated of thermosets pressurized in the mold cavity of heating.Its advantage is: equipment, mould, technology are simple, because mould does not have the runner cast gate, and weighing is reinforced, and there are not cast gate in stock utilization height, product, and be specious.But also there is very big shortcoming in this technology: because the artificial weighing of material require is reinforced, and material also has a thermoplastic process in die cavity, causes molding cycle long, production efficiency is low, the workman is long period of operation before die material, and working condition is abominable, and labour intensity is big.Thermosetting injection moulding is to finish on the injector of special use, raw material are heating and melting in the barrel of injector, under the effect of screw rod rotational pressure, the thermosetting plastics of fusion sprays from nozzle, main running channel, runner, cast gate through mould inject mold cavity, crosslinking curing moulding in the heated mold die cavity.Injection molding advantage is obvious: saved the cycle of the fusion of feeding in raw material, heat, molding cycle is short, the productivity ratio height, and labour intensity descends.But also there is certain shortcoming: the mold cavity because the thermosetting plastics of fusion will reinject through main running channel, runner, the cast gate of mould, the solidifying substance in main running channel, the runner has just slatterned, to such an extent as to the utilization rate of material is low; Because the existence of cast gate makes product surface have defective, influences outward appearance; Because material enters from cast gate, there is tangible directionality in materials flow, and the product internal stress is big; Because the materials flow at cast gate place speed is big, mould is very easily wearing and tearing herein.Ben be thermosetting plastics be cannot be recycling material, solidify the waste disposal difficulty, deal with improperly and can cause environmental pollution.Research and develop a kind of both stock utilizations height that can learn from other's strong points to offset one's weaknesses, the production that is used for thermosets of the comprehensive process that production efficiency is high-injection moulding technology is very important again.
Application number is that the Chinese patent application of CN200410051751.2 discloses a kind of plastics injection-compacting composite molding technique, and it includes following steps: (1) plastic raw materials heating plasticizing in the injector barrel; (2) under the effect of two-stage mold closing die opening mechanism, mould one-level matched moulds forms near closed hollow ring; (3) under the injection pressure effect, molten plastic is from the ejection of the nozzle of barrel front end, is injected into the near closed hollow ring of mould through running gate system, realizes the die cavity quantitative filling; (4) mould secondary matched moulds makes between punch and the die die joint apart from further reducing realization compression moulding; (5) the plastic melt temperature drops to below the softening point in the mould of cooling, finishes cooling and shaping; (6) under the effect of two-stage mold closing die opening mechanism, mold cavity is opened along die joint; Under the mould emptier effect, finish the plastic demoulding.This patent application also discloses the structure of a kind of mould of finishing this technology, this technology will be injected and pressing process combines together, but still there are runner and a cast gate, once to discard waste material remaining in the running channel after the circulation, waste is serious, simultaneously described as can be seen plastics are thermoplastic in its technical scheme, and the forming method of it and thermosetting plastics has very big difference.
Summary of the invention
The present invention is directed to the existing in prior technology problem a kind of novel thermosetting plastic forming method is provided, it is innovated based on the another kind on the thermoplastic injection-compacting composite molding theoretical foundation, the stock utilization height, the production efficiency height, be equal to injection molding working environment, mechanical performance of products and outward appearance all are better than injection molding product.
Another goal of the invention of the present invention has provided the mould of this thermoset plastic forming method, the long service life of this mould, compact conformation, easy to process.
First purpose of the present invention can realize by following technical proposal: a kind of injection transfer moulding method of thermosetting plastics may further comprise the steps:
A, fusion: the raw material of thermosetting plastics is heating and melting in the injector barrel;
B, preliminary matched moulds: the push rod slide block with mould behind the complete matched moulds resets, and crack mould makes the upper mold core and the lower mold core of mould and expects that chamber edge ring forms the reinforced chamber of closure;
C, injection: the thermosetting plastics raw material of fusion is injected into reinforced chamber through the injector nozzle;
D, pressurization matched moulds: make the upper mold core of mould and the plastics in the closed fully chamber of will feeding in raw material again of lower mold core be pressed in the die cavity by the pressurization matched moulds;
E, crosslinking curing: the raw material of thermosetting plastics is incubated, pressurize is to crosslinked curing in die cavity; Die sinking ejects product behind the crosslinking curing.
At first allow thermosetting plastics fusion in the barrel of injector, described injector can be that screw of injection also can be the piston injecting type, the raw material of described heating and melting should conform with the performance of the thermosetting plastics that is adopted, and notes stand-by period and the temperature of control plastics in barrel.The general type that adopts is a screw-type injection machine.
Behind the preliminary matched moulds, have certain distance up and down between two core rods, this distance should be relevant with the area that material chamber edge ring is enclosed with the size of products obtained therefrom.Material chamber edge ring and upper mold core and lower mold core form closed reinforced chamber, make the thermosetting plastics raw material that is injected among the step C fully join reinforced chamber, the thermosetting plastics raw material in the time of also will guaranteeing the pressurization matched moulds among the step D simultaneously in all material chambeies all is squeezed in the die cavity.Thermosetting plastics raw material of the present invention nozzle by injector when injection is injected in the reinforced chamber with the main running channel of being located at the mould middle part.
In the injection transfer moulding method of above-mentioned thermosetting plastics, the distance between upper mold core described in the step B and lower mold core is 4～10mm, can be according to the size of product, material flowability, the size of mould is done suitable adjustment.Particularly, the product gross weight is heavy more, and the distance between big, the relative more core rod of mould is big more, and the scope that the good more core rod spacing of the flowability of material is regulated is just big more, regulates more convenient.
In the injection transfer moulding method of above-mentioned thermosetting plastics, the heat preservation solidification time of thermosetting plastics in die cavity is 30～120 seconds in the step e, and holding temperature is 150 ℃～190 ℃.Be provided with heating temperature-control system in core rod, the temperature of control thermosetting plastics in die cavity is 150 ℃～200 ℃.Described temperature control system can be an electric heater unit, and temperature sensor is set in two moulds up and down controls temperature in the die cavity, can utilize simultaneously clamp force to guarantee pressure in the die cavity, difference according to the plastics of being processed allows plastics heat-insulation pressure keeping a period of time in die cavity, and thermosetting plastics is finished cross-linking reaction in during this period of time.
In addition, the present invention also provides this thermoset plastic forming method used mould, it comprises upper die and lower die and guiding mechanism, and wherein patrix comprises cope match-plate pattern, is fixedly connected on patrix tube on the cope match-plate pattern, is set in the upper mold core on the patrix tube, and the middle part of patrix studs with sprue bush; Counterdie comprises lower bolster, be fixedly connected on counterdie tube on the lower bolster, be set in the lower mold core on the counterdie tube, between counterdie tube and lower bolster, be provided with an ejecting mechanism that is used to eject product, it is characterized in that, lateral surface in described upper mold core and lower mold core contact position is provided with the edge ring, all be sealed and matched between edge ring and upper mold core, edge ring and the lower mold core, and inlay the reinforced chamber that ring, upper mold core, lower mold core three surround mould.
In order to guarantee the temperature of product when being shaped, in above-mentioned mould, described patrix tube and counterdie tube are provided with some pores that are used to install heater block.Respectively be provided with thermocouple to detect the temperature of core rod in the core rod up and down simultaneously.
In above-mentioned mould, described edge ring is to be fixed on the counterdie tube.Usually, the edge ring is fixed on the counterdie tube by screw.This mould in use, the edge ring all seals with lower mold core with upper mold core and contacts, easily wearing and tearing cause seal bad.In order to improve the wearability of edge ring, but that the hardness of edge ring requires is above and will inlay ring and be designed to detaching structure for HRC50, for making and maintenance provides convenience.
In above-mentioned mould, be provided with two cushion blocks between described counterdie tube and the lower bolster, above-mentioned ejecting mechanism is located in two cushion blocks.
In above-mentioned mould, at the counterdie position installing sprue puller corresponding with cast gate, the nearly gate end of described sprue puller is hook-shaped.After once circulation annotate to be pressed, by sprue puller the solidifying substance in the sprue bush is pulled out and to empty.
In above-mentioned mould, described counterdie nozzle is offered groove along the inboard, and described material chamber edge ring is arranged in the groove; Described material chamber edge ring can be fixed on the counterdie tube by screw.
In above-mentioned mould, described ejecting mechanism comprises some push rods that are arranged on the push pedal on the lower bolster and are arranged on push pedal top and the push rod that is arranged on the push pedal bottom, described push rod one end is a stiff end, the other end is the working end, above-mentioned stiff end is fixed in the push pedal, above-mentioned working end is passed described counterdie tube and can be entered in the reinforced chamber, and described push rod one end is fixed on the push pedal bottom, and the other end is connected with actuating unit.
After formed product, finish product by actuating unit control ejecting mechanism and eject the work that mould and ejecting mechanism reset.When actuating unit makes push rod in mould when mobile, the push pedal that is connected with push rod and also move with push rod that push pedal is connected is deviate from mould up to product; When ejecting mechanism need reset, actuating unit made push rod move toward mould outward, and the push pedal that is connected with push rod and also move with push rod that push pedal is connected resets up to ejecting mechanism.Ejecting mechanism is finished the working cycles that begins to enter after product ejects the work that mould and ejecting mechanism reset next time.
In above-mentioned mould, described push pedal top is provided with a fixed head, and described push rod passes fixed head, is provided with convex shoulder at the stiff end of push rod, and fixed head is pressed on the stiff end of push rod in the push pedal and with push pedal and is connected.By such structure, make push rod and push pedal form continuous action relation, move thereby drive push rod by push rod.
Therefore, thermoset plastic forming method of the present invention and mould thereof compared with prior art have the following advantages:
(1), thermoset plastic forming method of the present invention is fusion raw material directly enters the mold cavity of semi-closed by nozzle through main running channel that the injection resistance is little, it is the fastest that injection speed can reach, and saved the material feeding time.Mould matched moulds after material feeding is finished produces the TRANSIENT HIGH TEMPERATURE high pressure, accelerates the curing molding of material, shortens molding cycle.When thermosetting plastics was produced in batches, injection moulding shortened about 25% than total moulding cycle of injection;
(2), thermoset plastic forming method of the present invention does not have runner when injection moulding do not have cast gate, has saved raw-material loss greatly, utilization rate of raw materials rises about 5%;
(3), do not have the cast gate defective, product is elegant in appearance by the thermosetting plastics outward appearance of thermoset plastic forming method of the present invention preparation;
(4), thermoset plastic forming method of the present invention in the end fills by compression moulding, prepared thermosetting plastics weld mark can not occur, density is big, dimensionally stable, mechanical strength height, inherent quality increases substantially.
(5), utilizing the raw material of the thermosetting plastics of mould fusion of the present invention is low head injection under the situation of preliminary matched moulds, not only the wearing and tearing to the die cavity of barrel, screw rod, mould can significantly reduce, and mould of the present invention does not have runner and does not have cast gate, there are not the wearing and tearing of when injection to mold cavity, the particularly wearing and tearing at cast gate place, the service life of having improved mould greatly;
(6), mould of the present invention does not have runner does not have cast gate, annotates binder and injects the semi-closed mould, easily the gas in the mold cavity is discharged, and has simplified the mould of the exhaust gear, particularly a multi-cavity mold of mould, and is compacter than injection mould structure, processes simpler.
Description of drawings
Fig. 1 is the process chart of the injection transfer moulding method of thermosetting plastics of the present invention.
Fig. 2 is the structural representation of the mould that uses of the injection transfer moulding method of thermosetting plastics of the present invention.
Among the figure, 1, lower bolster; 11, material chamber edge ring; 12, patrix tube; 13, upper mold core; 14, cope match-plate pattern; 15, sprue puller; 16, centring ring; 17, sprue bush; 18, electrothermal tube; 2, push pedal; 21, guide pillar guide pin bushing; 22, screw; 23, push rod; 24, be and connect the hole; 3, cushion block; 4, fixed head; 5, push rod; 6, release link; 7, counterdie tube; 8, lower mold core.
The specific embodiment
Below be specific embodiments of the invention and in conjunction with the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
Embodiment 1:
One: the production process of the injection transfer moulding method of thermosetting plastics; Employed material is a phenolic resins.
(1): phenolic resin material is put into injector barrel heating and melting;
(2): the push rod slide block with mould behind the matched moulds resets, and crack mould makes upper mold core and the lower mold core and the closed reinforced chamber of edge ring formation, material chamber of mould; The distance of wherein controlling between the upper mold core lower bolster is about 4mm;
(3): the phenolic resin material of fusion is injected into reinforced chamber through the injector nozzle; The amount of the phenolic resins of injection is set according to the gross weight of product;
(4): the phenolic resin material that makes the upper mold core of mould and the complete closure of lower mold core will feed in raw material in the chamber by the pressurization matched moulds is pressed in the die cavity;
(5): make phenolic resin material insulation in die cavity under 190 ℃ of conditions, pressurize extremely crosslinked curing in 120 seconds;
(6): die sinking, eject product, clear up die cavity with air gun.Can carry out the work of next circulation.
Two: the structure of the thermosetting plastics injection molding die that said method is used as shown in Figure 1, pressure injection mold mainly partly is made up of shaped portion, guiding mechanism, ejecting mechanism, heating system, material feeding system, mould bases etc.Shaped portion mainly is made up of lower mold core 8, upper mold core 13.Guiding mechanism is made up of guide pillar guide pin bushing 21, centring ring 16.Liftout attachment is made up of push pedal 2, fixed head 4, push rod 5, push rod 23.Described push pedal 2 is arranged on the lower bolster, and three push rods 5 are arranged on push pedal 2 tops and a push rod 23 is arranged on push pedal 2 bottoms, and described fixed head 4 is connected in push pedal 2 tops.Above-mentioned push rod 5 one ends are stiff end, the other end is the working end, and this stiff end has convex shoulder, and fixed head is pressed on above-mentioned stiff end in the push pedal and with push pedal and is connected, and above-mentioned working end can enter in the reinforced chamber after passing described fixed head 4 and counterdie tube.The groove of described fixed head 4 is arranged on the side that contacts with push pedal 2 and matches with described stiff end shape, and described stiff end is arranged in the above-mentioned groove.The end face of stiff end withstands in the push pedal 2, and push pedal 2 can promote push rod 5 and moves in the mould when push pedal 2 is mobile in mould; The above-mentioned convex shoulder of fixed head 4 roof pressures moves described push rod 5 outside mould when push pedal 2 is mobile outside mould.Described push rod 23 1 ends are fixed on push pedal 2 bottoms, and the other end is connected with actuating unit.After formed product, actuating unit makes push rod 23 in the moulds when mobile, and the push pedal 2 that is connected with push rod 23 and also move with push rod 5 that push pedal 2 is connected is deviate from mould up to product; When ejecting mechanism need reset, actuating unit made push rod 23 move toward moulds outward, and the push pedal 2 that is connected with push rod 23 and also move with push rod 5 that push pedal 2 is connected resets up to ejecting mechanism.Ejecting mechanism is finished the working cycles that begins to enter after product ejects the work that mould and ejecting mechanism reset next time.
Heating system mainly is made up of electrothermal tube 18 and thermocouple, and electrothermal tube is arranged in the pore of upper and lower mould tube.The reinforced chamber that ring 11 and it and upper impression, lower impressions are formed is mainly inlayed by sprue bush 17, sprue puller 15, material chamber by the material feeding system.Mould bases as standard component comprises lower bolster 1, push pedal 2, cushion block 3, ejector retainner plate 4, release link 6, counterdie tube 7, patrix tube 12, cope match-plate pattern 14, guide pillar guide pin bushing 21 and fixed screw.Pressure injection mold of the present invention does not have runner, and the material of fusion directly is injected in the material chamber of the semi-closed that is made of last lower impressions and material cavity insert by main cast gate.Patrix comprises cope match-plate pattern 14 and the patrix tube 12 that is fixedly connected on the cope match-plate pattern 14, the middle part of patrix tube 12 is equiped with upper mold core 13, counterdie comprises lower bolster 1 and the counterdie tube 7 that is fixedly connected on the lower bolster 1, be provided with two cushion blocks 3 in counterdie tube 7 and the lower bolster 1, between two cushion blocks 3, be provided with ejecting mechanism, 7 mouthfuls in counterdie tube is used for fit sealing upper mold core 13 and lower mold core 8 to form the reinforced chamber edge ring 11 in reinforced chamber along inboard being provided with, and the middle part of patrix studs with sprue bush 17.Patrix tube 12 and counterdie tube 7 are provided with some pores that are used to install heater block.
Installing sprue puller 15 on the counterdie position corresponding with cast gate, the nearly gate end of described sprue puller 15 is hook-shaped, when every mould finished, by the separation of two moulds up and down, sprue puller pulled away the clout that remains in the sprue bush by the hook-shaped position of end.
The counterdie tube is offered groove along the inboard for 7 mouthfuls, and described material chamber edge ring 11 is arranged in the groove, and material chamber edge ring is fixed in the groove of counterdie tube 7 by screw, and the inboard of material chamber edge ring is sealed and matched with the periphery of two cores up and down, forms the reinforced chamber of sealing.
Embodiment 2:
One: the production process of the injection transfer moulding method of thermosetting plastics; Employed material is a melamine.
(1): melamine material is put into injector barrel heating and melting;
(2): the push rod slide block with mould behind the matched moulds resets, and crack mould makes upper mold core and the lower mold core and the closed reinforced chamber of edge ring formation, material chamber of mould; The distance of wherein controlling between the upper mold core lower bolster is about 10mm;
(3): the melamine material of fusion is injected into reinforced chamber through the injector nozzle; The amount of the melamine of injection is set according to the gross weight of product;
(4): the melamine material that makes the upper mold core of mould and the complete closure of lower mold core will feed in raw material in the chamber by the pressurization matched moulds is pressed in the die cavity;
(5): make melamine material insulation in die cavity under 170 ℃ of conditions, pressurize extremely crosslinked curing in 60 seconds;
(6): die sinking, eject product, clear up die cavity with air gun.Can carry out the work of next circulation.
Two: the structure of the mould that is adopted in this technology will repeat no more with embodiment 1.
Embodiment 3:
One: the production process of the injection transfer moulding method of thermosetting plastics; Employed material is BMC (BMC is the abbreviation of bulk unsaturated polyester).
(1): the BMC material is put into injector barrel heating and melting;
(2): the push rod slide block with mould behind the matched moulds resets, and crack mould makes upper mold core and the lower mold core and the closed reinforced chamber of edge ring formation, material chamber of mould; The distance of wherein controlling between the upper mold core lower bolster is about 7mm;
(3): the BMC material of fusion is injected into reinforced chamber through the injector nozzle; The amount of the phenolic resins of injection is set according to the gross weight of product;
(4): the BMC material that makes the upper mold core of mould and the complete closure of lower mold core will feed in raw material in the chamber by the pressurization matched moulds is pressed in the die cavity;
(5): make the insulation in die cavity under 150 ℃ of conditions of BMC material, pressurize extremely crosslinked curing in 30 seconds;
(6): die sinking, eject product, clear up die cavity with air gun.Can carry out the work of next circulation.
Two: the structure of the mould that is adopted in this technology will repeat no more with embodiment 1.
Specific embodiment described herein only is that the present invention's spirit is illustrated.The technical staff of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has used terms such as lower bolster 1, material chamber edge ring 11, patrix tube 12, upper mold core 13, cope match-plate pattern 14, sprue puller 15, centring ring 16, sprue bush 17, electrothermal tube 18, push pedal 2 morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present invention more easily; They are construed to any additional restriction all is contrary with spirit of the present invention.
Claims (10)
1, a kind of injection transfer moulding method of thermosetting plastics may further comprise the steps:
A, fusion: the raw material of thermosetting plastics is heating and melting in the injector barrel;
B, preliminary matched moulds: the push rod slide block with mould behind the complete matched moulds resets, and crack mould makes the upper mold core and the lower mold core of mould and hardness is more than the HRC50 and removable lining material chamber edge encircles the reinforced chamber that forms closure;
C, injection: the thermosetting plastics raw material of fusion is injected into reinforced chamber through the injector nozzle;
D, pressurization matched moulds: make the upper mold core of mould and the plastics in the closed fully chamber of will feeding in raw material again of lower mold core be pressed in the die cavity by the pressurization matched moulds;
E, crosslinking curing: the raw material of thermosetting plastics is incubated, pressurize is to crosslinked curing in die cavity; Die sinking ejects product behind the crosslinking curing.
2, the injection transfer moulding method of thermosetting plastics according to claim 1 is characterized in that, the distance between upper mold core described in the described step B and lower mold core is 4～10mm.
3, the injection transfer moulding method of thermosetting plastics according to claim 1 and 2 is characterized in that, the hardening time of thermosetting plastics in die cavity is 30～120 seconds in the described step e, and solidification temperature is 150 ℃～190 ℃.
4, a kind of injection molding die of thermosetting plastics, it comprises upper die and lower die and guiding mechanism, and wherein patrix comprises cope match-plate pattern, is fixedly connected on patrix tube on the cope match-plate pattern, is set in the upper mold core on the patrix tube, and the middle part of patrix studs with sprue bush; Counterdie comprises lower bolster, be fixedly connected on counterdie tube on the lower bolster, be set in the lower mold core on the counterdie tube, between counterdie tube and lower bolster, be provided with an ejecting mechanism that is used to eject product, it is characterized in that, it is more than the HRC50 and removable lining material chamber edge ring that lateral surface in described upper mold core and lower mold core contact position is provided with hardness, expect all to be sealed and matched between chamber edge ring and upper mold core, material chamber edge ring and the lower mold core, and expect that chamber edge ring, upper mold core, lower mold core three surround the reinforced chamber of mould.
5, the injection molding die of thermosetting plastics according to claim 4 is characterized in that, described patrix tube and counterdie tube are provided with some pores that are used to install heater block.
According to the injection molding die of claim 4 or 5 described thermosetting plasticses, it is characterized in that 6, described material chamber edge ring is to be fixed on the counterdie tube.
According to the injection molding die of claim 4 or 5 described thermosetting plasticses, it is characterized in that 7, be provided with two cushion blocks between described counterdie tube and the lower bolster, above-mentioned ejecting mechanism is located in two cushion blocks.
8, the injection molding die of thermosetting plastics according to claim 6 is characterized in that, described counterdie nozzle is offered groove along the inboard, and described material chamber edge ring is arranged in the groove; Described material chamber edge ring is fixed on the counterdie tube by screw.
9, according to the injection molding die of claim 4 or 5 described thermosetting plasticses, it is characterized in that, described ejecting mechanism comprises some push rods that are arranged on the push pedal on the lower bolster and are arranged on push pedal top and the push rod that is arranged on the push pedal bottom, described push rod one end is a stiff end, the other end is the working end, above-mentioned stiff end is fixed in the push pedal, above-mentioned working end is passed described counterdie tube and can be entered in the reinforced chamber, described push rod one end is fixed on the push pedal bottom, and the other end is connected with actuating unit.
10, the injection molding die of thermosetting plastics according to claim 9, it is characterized in that described push pedal top is provided with a fixed head, described push rod passes fixed head, stiff end at push rod is provided with convex shoulder, and fixed head is pressed on the stiff end of push rod in the push pedal and with push pedal and is connected.
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| CNB2006101187913A CN100548619C (en) | 2006-11-27 | 2006-11-27 | A kind of injection transfer moulding method of thermosetting plastics and mould thereof |
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| CNB2006101187913A CN100548619C (en) | 2006-11-27 | 2006-11-27 | A kind of injection transfer moulding method of thermosetting plastics and mould thereof |
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| CN108621388B (en) * | 2018-05-02 | 2020-10-02 | 东莞信兴塑胶制品有限公司 | Injection mold protection device that resets |
| CN111264979A (en) * | 2018-12-05 | 2020-06-12 | 宁波卓艺家纺有限公司 | Magnetic buckle and its making equipment |
| CN110181763A (en) * | 2019-05-30 | 2019-08-30 | 开平市盈光机电科技有限公司 | A kind of positioning process of double cave molds |
-
2006
- 2006-11-27 CN CNB2006101187913A patent/CN100548619C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1962232A (en) | 2007-05-16 |
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