CN112172008A

CN112172008A - Temperature difference impact-resistant anti-cracking PC injection molding process

Info

Publication number: CN112172008A
Application number: CN202010926507.5A
Authority: CN
Inventors: 孙喜杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2021-01-05

Abstract

The invention discloses a temperature difference impact resistant anti-cracking PC injection molding process, which belongs to the technical field of injection molding, and can creatively introduce inversion cracking balls into raw materials after injection molding on the basis of the traditional injection molding process, the raw materials are secondarily stirred under the action of an external magnetic field so as to improve the fluidity of the PC raw materials, silicon carbide powder is added to effectively resist the external temperature difference and improve the contractility of the PC raw materials, the inversion cracking balls are directly reserved in a product after cooling molding, the external temperature change is accurately sensed by utilizing the heat absorption characteristics of the inversion cracking balls, then opposite actions are triggered, the inversion cracking balls are integrally shrunk when the product is heated and expanded, the inversion cracking balls are integrally expanded when the product is cooled and contracted, the internal stress cracking phenomenon of the product caused by the temperature difference change is effectively counteracted, and the strength of the product under different environments is obviously improved, the service life of the product is prolonged.

Description

Temperature difference impact-resistant anti-cracking PC injection molding process

Technical Field

The invention relates to the technical field of injection molding, in particular to a temperature difference impact resistant anti-cracking PC injection molding process.

Background

With the rapid development of the plastic industry and the automobile industry, the variety and application range of the plastic for automobiles are continuously expanded due to the consideration of economy, safety and environmental protection. Due to the excellent performance of the plastic, the plastic is adopted in the automobile design in a large amount, so that the requirements of design performances such as light weight, safety, corrosion resistance, shape, comfort and the like of the automobile structure can be met, the cost is facilitated, and the energy is saved. The applications of plastics in automobiles are mainly divided into three categories: exterior trimming parts, interior trimming parts and functional structural parts. Exterior trimming parts: the plastic replaces steel, so that the weight of the automobile can be reduced, and the aim of saving energy is fulfilled; interior trim parts: the safety, environmental protection and comfort are taken as application characteristics, and the elastic body and the foamed plastic which can absorb impact energy and vibration energy are used for manufacturing products such as instrument boards, seats, headrests and the like, so that the damage to a human body in collision can be reduced, and the safety factor of an automobile is improved; functional structure spare: high-strength engineering plastics are mostly adopted to manufacture parts on a fuel tank, an engine and a chassis so as to reduce weight, reduce cost and simplify process.

The PC material can meet the requirements of high performance of automobile parts on toughness, strength, heat resistance, light transmission and the like of the material, is widely applied to automobile industrial parts, and is generally replaced by the PC material for thick-wall parts such as automobile lamp light guides, inner lamp covers and the like.

The annealing treatment method adopted in the prior art can effectively eliminate the cracking caused by the internal stress of the PC injection molding product with relatively uniform wall thickness, but the internal stress of the PC injection molding product with non-uniform wall thickness can not be well eliminated in the prior art, the cracking phenomenon can still occur in the environment with larger temperature difference, the product quality is seriously influenced, and the service life is shortened.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a temperature difference impact resistant and crack resistant PC injection molding process, which can creatively introduce an inversion cracking ball into a raw material after injection molding on the basis of the traditional injection molding process, carry out secondary stirring on the raw material based on the action of an external magnetic field so as to improve the fluidity of the PC raw material, and mix silicon carbide powder to effectively resist the external temperature difference so as to improve the shrinkage of the PC raw material, the inversion cracking ball is directly reserved in a product after cooling molding, and accurately senses the external temperature change by utilizing the heat absorption characteristic of the inversion cracking ball, then triggers the opposite action, the inversion cracking ball shrinks integrally when the product is heated and expands, the inversion cracking ball expands integrally when the product is cooled and contracts, thereby effectively offsetting the internal stress cracking phenomenon of the product caused by the temperature difference change and obviously improving the strength of the product in different environments, the service life of the product is prolonged.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A temperature difference impact and crack resistant PC injection molding process comprises the following steps:

s1, drying the PC raw material under the heating condition of 60-80 ℃ until the water content is lower than 0.3%;

s2, setting the temperature of a charging barrel of the injection molding machine at 230 ℃ and 250 ℃, setting the injection pressure at 50-80MPa, setting the mold temperature at 120 ℃ and 130 ℃, and maintaining the pressure for 1-3 seconds;

s3, putting 5-10% inverted cracking balls in volume ratio into a newly arranged feeding port on the injection mold, and applying a rotating uniform magnetic field to force the inverted cracking balls to be uniformly distributed after secondary stirring in the raw materials;

s4, cooling the mixture in a mode of firstly cooling the mixture to 80 ℃ by water and then cooling the mixture by air, wherein the cooling forming time is 40-50S;

and S5, cooling, forming, then automatically demoulding, taking out the product, and trimming to obtain the finished product.

Further, in the step S1, silicon carbide powder is mixed in the PC raw material in an amount of 1.2 to 1.5% by mass.

Further, the injection machine in the step S2 is provided with four sets of hot runners, the temperatures of the four sets of hot runners are 190 ℃, 210 ℃ and 180 ℃, and the corresponding injection pressures of the four sets of hot runners are 60MPa, 80MPa, 75MPa and 65MPa, respectively.

Further, the injection mold in step S2 is cleaned with acetone and coated with a release agent before injection molding.

Further, contravariant rupture ball includes magnetism moving ball and connects a plurality of contravariant sticks on magnetism moving ball, and the contravariant stick evenly inserts and locates on magnetism moving ball, set up a plurality of temperature change grooves corresponding with the contravariant stick in the magnetism moving ball, inlay in the temperature change groove and be connected with the temperature sensing and trade the balloon, magnetism moving ball outer end is seted up a plurality of migration holes that communicate with the temperature change groove, and the contravariant stick runs through the migration hole and is connected with the temperature sensing ball of taking a breath, and magnetism moving ball improves the cohesion with the PC raw materials as the base member, provides the support for the flexible of contravariant stick simultaneously, and the contravariant stick then is used for showing the opposite action that temperature sensing ball temperature variation brought, and the contravariant stick contracts when the product is heated to expand, and the contravariant stick expands when the product is cooled to supplementary product effectively offsets the internal stress fracture phenomenon that the product brought because of the difference in temperature change.

Further, the ball is taken a breath to temperature sensing includes the gas of body coupling becomes hemisphere and stationary state hemisphere, and the gas becomes hemisphere and is connected with the contravariant stick and keeps aerifing the inflation state, can trigger the inflation and the shrink action of gas change hemisphere through the control to gas, and then control the flexible action of contravariant stick.

Further, the parcel of attitude hemisphere outer end has a pair of accuse gas piece rather than laminating mutually, be connected with the gas storage package between accuse gas piece and the attitude hemisphere, set up in the attitude hemisphere and control the growth slot hole of gas piece looks vertically, it is connected with the trigger package to inlay in the growth hole, both ends all are connected with the migration ejector pin about the trigger package, and are connected between migration ejector pin and the accuse gas piece, still set up a pair of air vent that is linked together with the gas change hemisphere on the attitude hemisphere, trigger the package and can be based on the temperature perception to trigger the action of expend with heat and contract with cold, thereby utilize the migration ejector pin to control the intercommunication between gas change hemisphere and the gas storage package, realize the flexible action of contravariant stick based on the round trip flow of gas between gas change hemisphere and gas storage package.

Furthermore, be connected with synchronous wire drawing between accuse gas piece and the gas becomes the hemisphere, be connected with interior pole of stabilizing between roof and the stationary state hemisphere in the gas becomes the hemisphere, synchronous wire drawing and interior pole of stabilizing all play the effect that improves synchronous wire drawing stability, assist it to carry out the double-forming action simultaneously.

Further, the hollow structure who makes for adopting elastic material in the pole in the stability, and inside packing has shear thickening liquid, and pole in the stability can also support the contravariant stick, receiving instantaneous impact force, shear thickening liquid can become hard rapidly and support external force to the contravariant stick, under normal condition or under slow effort, shear thickening liquid still can keep the flow characteristic to satisfy the deformation of pole in the stability.

Furthermore, the magnetic moving ball is made of paramagnetic materials, the inversion rod is made of heat conduction materials with high thermal stability, the trigger bag is made of materials with thermal expansion coefficients larger than that of PC plastics, the magnetic moving ball can respond in a magnetic field to force the inversion rupture ball to be stirred and distributed in the raw materials, the magnetic moving ball does not show magnetism in a non-magnetic field state, the product performance is prevented from being interfered, the thermal stability of the inversion rod can resist size change caused by external temperature change, therefore, the triggering action of the temperature sensing balloon changing is accurately displayed, the triggering action of the temperature sensing balloon changing cannot be interfered by the temperature sensing balloon changing, meanwhile, heat on the product can be absorbed for transmission, and the action of the temperature sensing balloon changing is triggered quickly and accurately.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the scheme can realize that on the basis of the traditional injection molding process, the inversion cracking ball is innovatively introduced and mixed in the raw material after injection molding, the raw material is secondarily stirred under the action of an external magnetic field so as to improve the flowability of the PC raw material, silicon carbide powder is doped to effectively resist the external temperature difference and improve the contractility of the PC raw material, the inversion cracking ball is directly reserved in a product after cooling molding, the external temperature change is accurately sensed by utilizing the heat absorption characteristics of the inversion cracking ball, then opposite actions are triggered, the inversion cracking ball integrally shrinks when the product is heated to expand, and the inversion cracking ball integrally expands when the product is cooled to contract, so that the internal stress cracking phenomenon of the product caused by the temperature difference change is effectively counteracted, the strength of the product in different environments is obviously improved, and the service life of the product is prolonged.

(2) The contravariant disappearance ball includes the magnetism ball and connects a plurality of contravariant sticks on the magnetism ball, and the contravariant stick evenly inserts and locates on the magnetism ball, set up a plurality ofly in the magnetism ball with the corresponding temperature change groove of contravariant stick, inlay in the temperature change inslot and be connected with the temperature sensing and trade the balloon, the mobility hole of a plurality of and temperature change groove intercommunication is seted up to the magnetism ball outer end, and the contravariant stick runs through the mobility hole and is connected with the temperature sensing ball of taking a breath, the cohesion with the PC raw materials is improved as the base member to the magnetism ball, simultaneously for the flexible support that provides of contravariant stick, the contravariant stick then is used for showing the opposite action that the temperature change of temperature sensing ball of taking a breath brought, the contravariant stick shrink when the product is heated the inflation of being heated, thereby the contravariant stick inflation when the product is received cold, thereby auxiliary product.

(3) The ball is taken a breath to temperature sensing includes the gas of body coupling becomes hemisphere and stationary state hemisphere, and the gas becomes hemisphere and is connected with the contravariant stick and keeps aerifing the inflation state, can trigger the inflation and the shrink action of gas change hemisphere through the control to gas, and then the flexible action of control contravariant stick.

(4) The parcel of attitude hemisphere outer end has a pair of accuse gas piece rather than laminating mutually, be connected with the gas storage package between accuse gas piece and the attitude hemisphere, set up in the attitude hemisphere and grow the slot hole with accuse gas piece looks vertically, it is connected with the trigger package to inlay in the growth hole, both ends all are connected with the migration ejector pin about the trigger package, and be connected between migration ejector pin and the accuse gas piece, still set up a pair of air vent that is linked together with the gas change hemisphere on the attitude hemisphere, the trigger package can be based on the temperature perception, and trigger expend with heat and contract with cold's action, thereby utilize the migration ejector pin to control the intercommunication between gas change hemisphere and the gas storage package, realize the flexible action of contravariant stick based on the round trip flow of gas between gas change hemisphere and gas storage package.

(5) The synchronous wire drawing is connected between the gas control piece and the gas variable hemisphere, the stable inner rod is connected between the inner top wall of the gas variable hemisphere and the stationary hemisphere, the synchronous wire drawing and the stable inner rod both play a role in improving the stability of the synchronous wire drawing, and meanwhile, the synchronous wire drawing and the stable inner rod assist in the complex shape action.

(6) The hollow structure who makes for adopting elastic material in the pole in the stability, and inside packing has shear thickening liquid, and the pole can also support the contravariant stick in the stability, receiving instantaneous impact force, shear thickening liquid can become hard rapidly and support external force to the contravariant stick, under normal condition or under slow effort, shear thickening liquid still can keep the flow characteristic to satisfy the deformation of pole in the stability.

(7) The magnetic ball is made of paramagnetic materials, the inversion rod is made of heat conduction materials with high thermal stability, the trigger bag is made of materials with thermal expansion coefficients larger than that of PC plastics, the magnetic ball can respond in a magnetic field to force the inversion deglitching ball to be stirred and distributed in raw materials, the magnetic ball does not show magnetism in a non-magnetic field state, interference on product performance is avoided, the thermal stability of the inversion rod can resist size change caused by external temperature change, and therefore the triggering action of the temperature sensing balloon is accurately displayed, the triggering action of the temperature sensing balloon cannot be interfered by the inversion rod, meanwhile, heat on a product can be absorbed for transmission, and the action of the temperature sensing balloon is triggered quickly and accurately.

Drawings

FIG. 1 is a schematic structural view of the present invention when an inversion rupture ball is thrown;

FIG. 2 is a schematic diagram of an inverted blastomere of the present invention;

FIG. 3 is a schematic diagram of the internal structure of the inverted blastomere of the present invention;

FIG. 4 is a schematic view of the structure at A in FIG. 3;

FIG. 5 is a schematic structural view of the temperature-sensing balloon of the present invention in a low temperature state;

FIG. 6 is a schematic structural diagram of the temperature-sensing balloon of the present invention in a high temperature state.

The reference numbers in the figures illustrate:

1 inversion dehiscence ball, 11 magnetic dynamic balls, 12 inversion rods, 13 temperature sensing balloon changing, 131 air change hemispheres, 132 stationary hemispheres, 14 gas control sheets, 2 temperature change grooves, 3 synchronous wire drawing, 4 stable inner rods, 5 trigger packs, 6 migration ejector rods, 7 gas storage packs and 8 vent holes.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1, a temperature difference impact resistant and crack resistant PC injection molding process includes the following steps:

s1, drying the PC raw material under the heating condition of 60 ℃ until the water content is lower than 0.3%;

s2, setting the temperature of a charging barrel of the injection molding machine to 230 ℃, setting the injection pressure to 50-80MPa, setting the mold temperature to 120 ℃, and maintaining the pressure for 1 second;

s3, putting 5% inverted cracking balls 1 in volume ratio into a newly-arranged feeding port on the injection mold, and applying a rotary uniform magnetic field to force the inverted cracking balls 1 to be uniformly distributed after being secondarily stirred in the raw materials;

In step S1, silicon carbide powder is mixed with the PC raw material in an amount of 1.2% by mass.

In step S2, the injection machine is provided with four groups of hot runners, the temperature is 190 ℃, 210 ℃ and 180 ℃, and the corresponding four sections of injection pressure are 60MPa, 80MPa, 75MPa and 65MPa respectively.

The injection mold is cleaned with acetone and coated with a layer of release agent before injection molding in step S2.

Referring to fig. 2-4, the inversion splitting ball 1 includes a magnetic ball 11 and a plurality of inversion bars 12 connected to the magnetic ball 11, the inversion bar 12 is evenly inserted on the magnetic ball 11, a plurality of temperature change grooves 2 corresponding to the inversion bar 12 are arranged in the magnetic ball 11, a temperature sensing balloon 13 is embedded and connected in the temperature change grooves 2, a plurality of migration holes communicated with the temperature change grooves 2 are arranged at the outer end of the magnetic ball 11, the inversion rod 12 penetrates through the migration hole and is connected with the temperature sensing balloon 13, the magnetic moving ball 11 is used as a substrate to improve the bonding force with the PC raw material, meanwhile, the inversion bar 12 provides a support for the expansion and contraction of the inversion bar 12, the inversion bar 12 is used for displaying the opposite action caused by the temperature change of the temperature sensing air change balloon 13, the inversion rod 12 contracts when the product is heated and expanded, and the inversion rod 12 expands when the product is cooled and contracted, so that the auxiliary product can effectively counteract the phenomenon of internal stress cracking of the product caused by temperature difference change.

Referring to fig. 5-6, the temperature sensing balloon 13 includes an air-varying hemisphere 131 and a stationary hemisphere 132 integrally connected to each other, and the air-varying hemisphere 131 is connected to the inverter rod 12 and maintains an inflated state, so that the inflation and deflation of the air-varying hemisphere 131 can be triggered by controlling the gas, and the expansion and contraction of the inverter rod 12 can be controlled.

The outer end of the stationary hemisphere 132 is wrapped with a pair of air control sheets 14 attached to the stationary hemisphere, an air storage bag 7 is connected between the air control sheets 14 and the stationary hemisphere 132, a growth hole perpendicular to the air control sheets 14 is formed in the stationary hemisphere 132, a trigger bag 5 is connected in the growth hole in an embedded manner, migration ejector rods 6 are connected to the left end and the right end of the trigger bag 5, the migration ejector rods 6 are connected to the air control sheets 14, the migration ejector rods 6 are in a shape that the diameter of the migration ejector rods 6 is gradually reduced towards one end of the trigger bag 5, so that the vent holes 8 can be communicated with the growth holes along with the outward movement of the migration ejector rods 6, the air tightness under a normal state is improved, advanced air exchange action is not easy to occur, a pair of vent holes 8 communicated with the air variable hemisphere 131 is further formed in the stationary hemisphere 132, the trigger bag 5 can be based on temperature sensing and trigger the action of thermal expansion and cold contraction, so that the communication between the, the telescopic action of the inversion rod 12 is realized based on the back and forth flow of gas between the gas change hemisphere 131 and the gas storage bag 7.

Synchronous wire drawing 3 is connected with between accuse gas piece 14 and the gas becomes hemisphere 131, becomes to be connected with between hemisphere 131 inner roof and the stationary state hemisphere 132 and stabilize interior pole 4, and synchronous wire drawing 3 all plays the effect that improves synchronous wire drawing 3 stability with stabilizing interior pole 4, assists it to carry out the double-forming action simultaneously.

The hollow structure of pole 4 for adopting elastic material to make in the stability, and inside packing has shear thickening liquid, and pole 4 can also support contravariant stick 12 in the stability, receiving instantaneous impact force, shear thickening liquid can become hard rapidly and support contravariant stick 12 and resist external force, under normal condition or under slow effort, shear thickening liquid still can keep the flow characteristic to satisfy the deformation of pole 4 in the stability.

The magnetic ball 11 is made of paramagnetic materials, the inversion rod 12 is made of heat conduction materials with high thermal stability, the trigger pack 5 is made of materials with thermal expansion coefficients larger than that of PC plastics, the magnetic ball 11 can respond in a magnetic field to force the inversion cracking ball 1 to be stirred and distributed in raw materials, the magnetic ball 11 does not show magnetism in a non-magnetic field state, the product performance is prevented from being interfered, the thermal stability of the inversion rod 12 can resist the size change caused by the change of external temperature, the triggering action of the temperature sensing air changing balloon 13 is accurately displayed, the triggering action can not be interfered by the temperature sensing air changing balloon 13, meanwhile, heat on the product can be absorbed for transmission, and the action of the temperature sensing air changing balloon 13 is triggered quickly and accurately.

Example 2:

s1, drying the PC raw material under the heating condition of 70 ℃ until the water content is lower than 0.3%;

s2, setting the temperature of a charging barrel of the injection molding machine to 240 ℃, setting the injection pressure to 50-80MPa, setting the mold temperature to 125 ℃, and maintaining the pressure for 2 seconds;

s3, putting 8% inverted cracking balls 1 in the newly-arranged feeding port of the injection mold, and applying a rotating uniform magnetic field to force the inverted cracking balls 1 to be uniformly distributed after being secondarily stirred in the raw materials;

s4, cooling the mixture in a mode of firstly cooling the mixture to 80 ℃ by water and then cooling the mixture by air, wherein the cooling forming time is 45S;

In step S1, silicon carbide powder is mixed with the PC raw material in an amount of 1.3% by mass.

The remainder was in accordance with example 1.

Example 3:

s1, drying the PC raw material under the heating condition of 80 ℃ until the water content is lower than 0.3%;

s2, setting the temperature of a charging barrel of the injection molding machine to be 250 ℃, setting the injection pressure to be 50-80MPa, setting the mold temperature to be 130 ℃, and keeping the pressure for 3 seconds;

s3, putting the inversion anti-cracking balls 1 with the volume ratio of 10% into a newly-arranged feeding port on the injection mold, and applying a rotating uniform magnetic field to force the inversion anti-cracking balls 1 to be uniformly distributed after being secondarily stirred in the raw materials;

s4, cooling the mixture in a water cooling mode after the mixture is cooled to 80 ℃, wherein the cooling forming time is 50S;

In step S1, silicon carbide powder is mixed with the PC raw material in an amount of 1.5% by mass.

The remainder was in accordance with example 1.

The invention can creatively introduce the inversion cracking ball 1 to be mixed in the raw material after injection molding on the basis of the traditional injection molding process, the raw material is stirred for the second time under the action of an external magnetic field to improve the fluidity of the PC raw material, silicon carbide powder is doped to effectively resist the external temperature difference and improve the contractility of the PC raw material, the inversion cracking ball 1 is directly reserved in a product after cooling molding, the external temperature change is accurately sensed by utilizing the heat absorption characteristic of the inversion cracking ball, then opposite actions are triggered, the inversion cracking ball 1 is integrally shrunk when the product is heated and expanded, and the inversion cracking ball 1 is integrally expanded when the product is cooled and shrunk, so that the cracking internal stress phenomenon of the product caused by the temperature difference change is effectively counteracted, the strength of the product in different environments is obviously improved, and the service life of the product is prolonged.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. A temperature difference impact and crack resistant PC injection molding process is characterized in that: the method comprises the following steps:

s3, putting 5-10% inverted cracking balls (1) in volume ratio into a newly-arranged feeding port on the injection mold, and applying a rotary uniform magnetic field to force the inverted cracking balls (1) to be uniformly distributed after being secondarily stirred in the raw materials;

2. The injection molding process of PC with temperature difference impact resistance and crack resistance as claimed in claim 1, wherein: in the step S1, silicon carbide powder with the mass ratio of 1.2-1.5% is mixed in the PC raw material.

3. The injection molding process of PC with temperature difference impact resistance and crack resistance as claimed in claim 1, wherein: the injection machine in the step S2 is provided with four groups of hot runners, the temperature is 190 ℃, 210 ℃ and 180 ℃, and the corresponding four sections of injection pressure are 60MPa, 80MPa, 75MPa and 65MPa respectively.

4. The injection molding process of PC with temperature difference impact resistance and crack resistance as claimed in claim 1, wherein: the injection mold in step S2 is cleaned with acetone and coated with a release agent before injection molding.

5. The injection molding process of PC with temperature difference impact resistance and crack resistance as claimed in claim 1, wherein: the utility model discloses a temperature-sensing splitting ball, including magnetism moving ball (11) and a plurality of contravariant stick (12) of connecting on magnetism moving ball (11), and contravariant stick (12) evenly insert locate magnetism moving ball (11), set up a plurality of temperature change groove (2) corresponding with contravariant stick (12) in magnetism moving ball (11), inlay in temperature change groove (2) and be connected with temperature sensing and trade balloon (13), the migration hole of a plurality of and temperature change groove (2) intercommunication is seted up to magnetism moving ball (11) outer end, and contravariant stick (12) run through the migration hole and trade balloon (13) with temperature sensing and be connected.

6. The PC injection molding process of claim 5, wherein the PC injection molding process is characterized in that: the temperature sensing balloon (13) comprises an air-variable hemisphere (131) and a stationary hemisphere (132) which are integrally connected, and the air-variable hemisphere (131) is connected with the inversion rod (12) and keeps an inflation state.

7. The PC injection molding process of claim 6, wherein the PC injection molding process is characterized in that: the parcel of attitude hemisphere (132) outer end has a pair of accuse gas piece (14) rather than laminating mutually, be connected with gas storage package (7) between accuse gas piece (14) and attitude hemisphere (132), set up in attitude hemisphere (132) and grow the slot hole with accuse gas piece (14) looks vertically, it is connected with trigger package (5) to inlay in the growth hole, both ends all are connected with migration ejector pin (6) about trigger package (5), and are connected between migration ejector pin (6) and accuse gas piece (14), still set up a pair of air vent (8) that are linked together with gas change hemisphere (131) on attitude hemisphere (132).

8. The PC injection molding process of claim 7, wherein the PC injection molding process is characterized in that: the synchronous drawing device is characterized in that a synchronous drawing wire (3) is connected between the gas control sheet (14) and the gas variable hemisphere (131), and a stable inner rod (4) is connected between the inner top wall of the gas variable hemisphere (131) and the stationary hemisphere (132).

9. The PC injection molding process of claim 8, wherein the PC injection molding process is characterized in that: the stable inner rod (4) is of a hollow structure made of elastic materials, and shear thickening liquid is filled inside the stable inner rod.

10. The PC injection molding process of claim 7, wherein the PC injection molding process is characterized in that: the magnetic ball (11) is made of paramagnetic materials, the inversion rod (12) is made of heat conduction materials with high heat stability, and the trigger bag (5) is made of materials with thermal expansion coefficients larger than PC plastics.