CN109111089A

CN109111089A - Molding machine and forming method

Info

Publication number: CN109111089A
Application number: CN201811244202.5A
Authority: CN
Inventors: 陈超
Original assignee: Dongguan Xuan Chi Intelligent Technology Co Ltd
Current assignee: Dongguan Xuan Chi Intelligent Technology Co Ltd
Priority date: 2018-07-30
Filing date: 2018-10-24
Publication date: 2019-01-01
Anticipated expiration: 2038-10-24
Also published as: CN109111089B

Abstract

The present invention discloses a kind of molding machine, which includes: fixing seat, forms the inner cavity of recording quantity, the inner cavity is connected to the air pipeline of evacuator or air compressor；Fixed frame is adapted with the open surface of the fixing seat and can form sealing cooperation, and is circumferentially with a circle fixed part along it；Fixed model is located in the range of the fixed frame, and to be used to support workpiece, the inside of the inner cavity is arranged in the fixed model or the fixed model is arranged in the outside of the inner cavity and is located in an enclosure space with the workpiece；Flexible Model about Ecology, edge part are fixed on the fixed part and are formed sealing cooperation, and the Flexible Model about Ecology, the fixed frame and the fixing seat are enclosed sealing structure.Invention additionally discloses a kind of forming methods.Present invention reduces the fraction defectives and production cost of upper and lower male and female mold shaped article.

Description

Molding machine and forming method

Technical field

The present invention relates to molding equipment technical field, in particular to a kind of molding machine and forming method.

Background technique

The moulding process of the workpiece such as glass is that concave-convex graphite jig carries out die mould, but this way one above and below taking at present It is confidential to use 10-20 mold, and the precision of multiple sets of molds not can guarantee unanimously, so that the ruler of product can not be managed accurately Very little, effect.Upper/lower die mismachining tolerance will lead to product can not fit in certain one side completely, not conform to so as to cause product size A series of undesirable elements such as lattice, size side, folding line generate.For composite molding field, shape before only needing well cutting to form, Secondary operation is gone again after being not required to molding, can process finished product；It reduces technique, optimize the reduction that technique bring is production equipment With the raising of efficiency etc.；Forming field is not limited only to above several points, can also be applied to molding all spectra.

Meanwhile mold needs are constantly heated and are cooled down, and will affect processing efficiency, loss of energy；Mold passes through repeatedly It has the environment of oxygen, anaerobic, high temperature and room temperature all through the ages, mold oxidation can be made to accelerate, increase the manufacturing cost of mold.

Summary of the invention

The main object of the present invention is to propose a kind of molding machine and forming method, it is intended to be solved upper recessed in the prior art The problem of convex mold shaped article fraction defective height, high production cost.

To achieve the above object, the present invention proposes a kind of molding machine.The device includes:

Fixing seat forms the ventilation duct of the inner cavity of recording quantity, the inner cavity and evacuator or air compressor Road connection；

Fixed frame is adapted with the open surface of the fixing seat and can form sealing cooperation, and is circumferentially with a circle along it Fixed part；

Fixed model is located in the range of the fixed frame, and to be used to support workpiece, the fixed model is arranged in institute The inside or the fixed model for stating inner cavity are arranged in the outside of the inner cavity and are located at an enclosure space with the workpiece It is interior；

Flexible Model about Ecology, edge part is fixed on the fixed part and is formed sealing cooperation, the Flexible Model about Ecology, described solid Determine frame and the fixing seat is enclosed sealing structure.

Preferably, the bottom of the inner cavity is equipped with multiple ventilation openings, the ventilation opening and evacuator or air compresses The air pipeline of machine is connected to.

Preferably, the surrounding edge of the open surface of the fixing seat is circumferentially with a circle groove, the fixed frame along it Circle protrusion compatible with the groove is equipped with the contact portion of the fixing seat.

Preferably, further include primary heater for heating the inner cavity or the enclosure space.

Preferably, the Flexible Model about Ecology is high temperature flexible membrane.

Preferably, the fusing point of the fixed model is higher than 1~5 times of the forming temperature of workpiece.

The present invention also proposes a kind of forming method, which makes workpiece shaping using above-mentioned molding machine, the molding Method the following steps are included:

Room temperature or the workpiece for being heated to preheating temperature are placed on fixed model；

Flexible Model about Ecology is fixed in the fixed part of fixed frame, is laid in the Flexible Model about Ecology in the fixed frame；

The fixed frame for being equipped with the Flexible Model about Ecology is installed in fixing seat；

Inner cavity or enclosure space are heated to preset forming temperature and kept the temperature；

The inner cavity is vacuumized at a temperature of keeping molding or is inflated to the inner cavity, the Flexible Model about Ecology occurs Deformation is simultaneously pressed on workpiece, so that workpiece generates deformation and fits on the fixed model；

Stop heating, and when workpiece is cooled to preset calcining temperature, stopping is vacuumized or inflated to the inner cavity.

Preferably, the step of workpiece being heated to preheating temperature include:

Workpiece is put into secondary heater and is heated；

Stop heating when the temperature of workpiece is increased to preheating temperature.

Preferably, the inner cavity is vacuumized or includes: the step of inflation to the inner cavity

When vacuumizing the inner cavity, start evacuator, it will be described interior by preset atmospheric pressure value under forming temperature Chamber vacuumizes；

When inflating to the inner cavity, start air compressor, by preset atmospheric pressure value to described interior under forming temperature Chamber inflation；

After preset atmospheric pressure value to be achieved, pressure maintaining is carried out to the inner cavity by the preset dwell time.

Preferably, the mode that the fixed frame for being equipped with the Flexible Model about Ecology is installed in the fixing seat is Cylinder driving.

The present invention is enclosed sealing structure by setting Flexible Model about Ecology, fixed frame and fixing seat, to inner cavity or closing It is vacuumized after space heating to forming temperature or is inflated to inner cavity, Flexible Model about Ecology distribution deformation is made gradually to press workpiece simultaneously It fits on fixed model, stops heating, after workpiece is cooled to calcining temperature, stopping is vacuumized or inflated to inner cavity, is obtained Shaped article is obtained, to solve the problems, such as male and female mold shaped article fraction defective height, high production cost above and below in the prior art.

Detailed description of the invention

Fig. 1 is the structural schematic diagram in one embodiment of molding machine of the present invention before workpiece die mould；

Fig. 2 is the structural schematic diagram in the another embodiment of molding machine of the present invention before workpiece die mould；

Fig. 3 is the step flow chart of one embodiment of forming method of the present invention；

Fig. 4 is the structural schematic diagram in Fig. 1 after workpiece die mould；

Fig. 5 is the structural schematic diagram in Fig. 2 after workpiece die mould；

Fig. 6 is the step flow chart that workpiece is heated to preheating temperature in mono- embodiment of Fig. 3；

Fig. 7 is the step flow chart that inner cavity is vacuumized or inflated to inner cavity in mono- embodiment of Fig. 3.

Specific embodiment

The embodiment of the present invention is described more fully below, the example of embodiment is shown in the accompanying drawings, wherein phase from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached drawing The embodiment of description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention, be based on this hair Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts Example, shall fall within the protection scope of the present invention.

In order to solve the above technical problems, the present invention proposes a kind of molding machine, and referring to Figures 1 and 2, the molding machine packet Include: fixing seat 10 forms the inner cavity of recording quantity, and inner cavity is connected to the air pipeline of evacuator or air compressor； Fixed frame 20 is adapted with the open surface of fixing seat 10 and can form sealing cooperation, and is circumferentially with a circle fixed part 21 along it； Fixed model 30 is located in the range of fixed frame 20, and to be used to support workpiece 40, fixed model 30 is arranged in inner cavity Portion or fixed model 30 are arranged in the outside of inner cavity and are located in an enclosure space with workpiece 40；Flexible Model about Ecology 50, side Edge is fixed on fixed part 21 and is formed sealing cooperation, and Flexible Model about Ecology 50, fixed frame 20 and fixing seat 10 are enclosed sealing Structure.

In the present embodiment, fixing seat 10 can be made of materials such as ceramics, stainless steel and iron, and high temperature resistant temperature needs Much higher than the forming temperature for being formed object.Cuboid, cylindrical body or other shapes can be set into fixing seat 10, correspondingly, Fixed frame 20 is also provided with into shape compatible with the top of fixing seat 10.

Fixed frame 20 can be a metal frame, can be made of metal materials such as copper, and circumferentially arranged have a circle Fixed part 21, the fixed part 21 can be made of upper and lower two clamping parts, and lower clamping part is fixedly connected with fixed frame 20, and weldering can be used The modes such as connect, be bolted, alternatively, lower clamping part can also be integrally formed with fixed frame 20.Upper clamping part can be one piece with The lower consistent strip framework of clamping part size can lock to be formed to seal by bolt and match between upper clamping part and lower clamping part It closes.

Workpiece 40 can be the product that glass, acrylic board etc. need thermoforming, will select glass in the embodiment of the present invention Technological parameter come illustrate the technical program specific embodiment party examination.

When in use, its edge part is placed on lower clamping part for Flexible Model about Ecology 50, covers clamping part, then use bolt lock Tightly.Fixed model 30 is the mold for workpieces processing 40, can be fixed on the bottom of inner cavity.

In a preferred embodiment, the bottom of inner cavity is equipped with multiple ventilation openings 11, ventilation opening 11 and evacuator or sky The air pipeline of air compressor is connected to.

In the present embodiment, ventilation opening 11 is connected to inner cavity and air pipeline, quantity can be set to 2 it is even more.It is logical Starting evacuator or air compressor are crossed, inner cavity can be made to reach required atmospheric pressure value (including positive pressure and negative pressure).

Furthermore it is also possible to can satisfy using positive pressure and negative pressure integral mechanism and vacuumize inner cavity and inflated to inner cavity The needs of two kinds of usage scenarios, for example can be using the exhibition positive and negative press of letter TM2680F.

In a preferred embodiment, the surrounding edge of the open surface of fixing seat 10 is circumferentially with a circle groove along it, Gu Determine frame 20 and is equipped with circle protrusion compatible with groove with the contact portion of fixing seat 10.

It in the present embodiment, picks and places from fixing seat 10 for the ease of fixed frame 20, is set at 10 top of fixing seat along its circumferential direction A circle groove is set, while one circle of contact portion setting at fixed frame 20 with 10 top of fixing seat is compatible with aforementioned grooves convex It rises.

When inner cavity is vacuumized, although fixed frame 20 is flexibly connected with fixing seat 10, since pull of vacuum inflexibly will Fixed frame 20 is fitted in fixing seat 10, so and not having to the problem of worrying the stability of fixed frame 20.

To inner cavity inflate when, fixed frame 20 is fallen from fixing seat 10 in order to prevent, can fixed frame 20 framework with The corresponding position of fixing seat 10 opens up screw hole, and the two is fixed together by bolt.

In addition, in order to obtain better seal effect, avoid between fixed frame 20 and fixing seat 10 there are gap, it can be with The one circle sealing ring of setting in the groove of fixing seat 10.

In a preferred embodiment, which further includes the first heating for heating bore or enclosure space Device.

In the present embodiment, the profiling operation of workpiece 40 needs to carry out under high temperature environment, in addition to workpiece 40 can be maintained good Good ductility, can also influence the flexibility of Flexible Model about Ecology 50, so that deformation occurs and presses workpiece 40 for Flexible Model about Ecology 50.Therefore This, needs to heat inner cavity or enclosure space, and primary heater can be heating furnace, micro-wave oven, infrared ray (IR) and add Thermal etc..

In a preferred embodiment, Flexible Model about Ecology 50 is high temperature flexible membrane.

In the present embodiment, high temperature flexible membrane can be made of high temperature resistant silicon glue material, and surface is smooth under high temperature environment, Have the characteristics that flexible, anti-oxidant, plastic deformation is resilient, surface is smooth under high temperature and pressure.

In a preferred embodiment, the fusing point of fixed model 30 is higher than 1~5 times of the forming temperature of workpiece 40.

In the present embodiment, fixed model 30 is used to support workpiece 40.Fixed model 30 can use to be become at high operating temperatures The hard material that shape amount is small, heat transfer efficiency is good, for example, graphite, metal, ceramics, silicon carbide or stainless steel etc..30 material of fixed model Selection to refer to the forming temperature of workpiece 40, the fusing point of fixed model 30 be preferably higher than the 1~5 of the forming temperature of workpiece 40 Times.

The present invention also proposes a kind of forming method, referring to Fig. 3, the forming method using above-mentioned molding machine make workpiece at Type, the forming method the following steps are included:

Room temperature or the workpiece 40 for being heated to preheating temperature are placed on fixed model 30 by step S100.

In this step, manipulator or other modes can be used to grab workpiece 40 and be placed on fixed model 30.

Flexible Model about Ecology 50 is fixed in the fixed part 21 of fixed frame 20 by step S200, is laid in Flexible Model about Ecology 50 solid Determine in frame 20.At this point, inner cavity is consistent with external pressure value.

The fixed frame 20 for being equipped with Flexible Model about Ecology 50 is installed in fixing seat 10 by step S300.To Flexible Model about Ecology 50 Sealing structure is formed with fixing seat 10.

Inner cavity or enclosure space are heated to preset forming temperature and kept the temperature by step S400.

In this step, forming temperature can be 700 DEG C~800 DEG C.The selection of forming temperature can be with reference to workpiece 40 Material composition is arranged.For example, the crystallinity of workpiece 40 is higher when the silica composition content of workpiece 40 is higher, destroy Energy required for it is crystallized is bigger, and the softening point of workpiece 40 is higher, therefore selects higher 800 DEG C of forming temperature；Work as work When the silica composition content of part 40 is lower, 700 DEG C of lower forming temperature can choose；Under normal circumstances, it preferably forms Temperature is 750 DEG C.

Inner cavity is vacuumized at a temperature of keeping molding or is inflated to inner cavity, makes Flexible Model about Ecology that shape occur by step S500 Become and be pressed on workpiece, so that workpiece generates deformation and fits on fixed model.

In this step, referring to Fig. 4 and Fig. 5, as inner cavity is evacuated or inner cavity is gradually filled with gas, high temperature is flexible Deformation occurs for film 50, pushes heated workpiece 40, is pressed by high temperature flexible membrane to workpiece 40, to make workpiece 40 It is squeezed and deformed, fits on fixed model 30.This mode can be such that workpiece 40 is bonded completely with fixed model 30；It will not be because of upper Lower mold mismachining tolerance and cause workpiece that can not fit in certain one side completely, so that shaped article be made to generate off-dimension, big A series of undesirable elements such as small side, folding line generate.

Step S600 stops heating, and when workpiece 40 is cooled to preset calcining temperature, stopping vacuumizes or stops It is inflated to inner cavity.

In this step, since workpiece 40 and Flexible Model about Ecology 50, fixed model 30 are unlike material, do not melt at high temperature It closes, after workpiece 40 is cooled to calcining temperature, stops vacuumizing, keep internal and external pressure difference consistent, can be easy to shaped article It takes out, can also apply some release agents helps to demould.

In a preferred embodiment, the step of workpiece 40 being heated to preheating temperature in reference Fig. 6, abovementioned steps S100 packet It includes:

Workpiece 40 is put into secondary heater and heats by step S110.

In this step, secondary heater can be heating furnace, and workpiece 40 is put into heating furnace and is heated, preheating here Temperature can be 300~400 DEG C.The selection of preheating temperature can be arranged with reference to the material composition of workpiece 40.For example, working as workpiece When 40 silica composition content is higher, the crystallinity of workpiece 40 is higher, destroy its crystallize required for energy it is bigger, work The softening point of part 40 is higher, therefore selects higher 400 DEG C of preheating temperature；When the silica composition content of workpiece 40 is lower When, it can choose 300 DEG C of lower preheating temperature；Under normal circumstances, preferably preheating temperature is 350 DEG C.Workpiece is first preset Benefit is on the one hand can to directly heat forming temperature to avoid workpiece 40 to may result in the anxious heat of workpiece and damaged, another party Face can also make workpiece 40 obtain good ductility.Secondary heater can also be infrared ray (IR) heating device, micro-wave oven Or other heating methods.

Step S120 stops heating when the temperature of workpiece 40 is increased to preheating temperature.

In this step, by that workpiece 40 can be made to obtain better ductility to the preheating of workpiece 40, meanwhile, it can also It entire inner cavity is heated on fixed model 30 and expends more energy to avoid the workpiece 40 of room temperature to be placed directly on And the time.

In a preferred embodiment, the step for inner cavity being vacuumized or being inflated to inner cavity in reference Fig. 7, abovementioned steps S500 Suddenly include:

Step S510 starts evacuator when vacuumizing inner cavity, will be interior by preset atmospheric pressure value under forming temperature Chamber vacuumizes.

In this step, the atmospheric pressure value of vacuum environment is -0.1~-0.9Mp when vacuumizing, and size can be according to aforementioned The height of forming temperature is arranged.For example, the ductility of workpiece 40 is very strong when aforementioned forming temperature is higher, its deformation is forced Required pressure is smaller, therefore selects lower -0.1~-0.5Mp of atmospheric pressure value；When aforementioned forming temperature is lower, can choose Higher -0.5~-0.9Mp of atmospheric pressure value, under normal circumstances, preferably atmospheric pressure value is -0.8Mp.

Step S520 starts air compressor when inflating to inner cavity, inside by preset atmospheric pressure value under forming temperature Chamber inflation.

In this step, when inflation, inner cavity atmospheric pressure value is then 0.1~1.0Mp.For example, glass needs in the state of 700 DEG C The atmospheric pressure value of 0.2~0.5Mp is wanted to go to press.

Step S530 after preset atmospheric pressure value to be achieved, carries out pressure maintaining to inner cavity by the preset dwell time.

In this step, after reaching corresponding atmospheric pressure value, it is also necessary to pressure maintaining is carried out, so that workpiece 40 can cool down knot Crystalline substance, vacuumizing the dwell time is 20~30s.Likewise, the selection of dwell time can be set with reference to the material composition of workpiece 40 It sets.For example, regularity is strong, and crystalline rate is fast when the silica composition content of workpiece 40 is higher, shorter guarantor can choose Press time 20s；When the silica composition content of workpiece 40 is lower, longer dwell time 30s can choose；Ordinary circumstance Under, the preferably dwell time is 25s.

In a preferred embodiment, the fixed frame 20 for being equipped with Flexible Model about Ecology 50 is installed to fixation in above mentioned step S3 00 Mode on seat 10 is cylinder driving

In the present embodiment, the piston rod of cylinder is fixedly connected with fixed frame 20, and cylinder piston rod moves up and down to drive Fixed frame 20 opens and closes.In addition to cylinder drives, the folding of fixed frame 20 can also be driven using driving motor or other modes.

Above is only part or preferred embodiment of the invention, therefore either text or attached drawing cannot all limit this The range of protection is invented to be made under all designs with an entirety of the invention using description of the invention and accompanying drawing content Equivalent structure transformation, or directly/be used in other related technical areas indirectly and be included in the scope of protection of the invention.

Claims

1. a kind of molding machine characterized by comprising

Fixing seat, the air pipeline for forming the inner cavity of recording quantity, the inner cavity and evacuator or air compressor connect It is logical；

Fixed frame is adapted with the open surface of the fixing seat and can form sealing cooperation, and is circumferentially with a circle along it and fixes Portion；

Fixed model is located in the range of the fixed frame, and to be used to support workpiece, the fixed model is arranged described interior The inside of chamber or the fixed model are arranged in the outside of the inner cavity and are located in an enclosure space with the workpiece；

Flexible Model about Ecology, edge part are fixed on the fixed part and form sealing cooperation, the Flexible Model about Ecology, the fixed frame Sealing structure is enclosed with the fixing seat.

2. molding machine according to claim 1, which is characterized in that the bottom of the inner cavity is equipped with multiple ventilation openings, institute Ventilation opening is stated to be connected to the air pipeline of evacuator or air compressor.

3. molding machine according to claim 1, which is characterized in that the surrounding edge edge of the open surface of the fixing seat It is circumferentially with a circle groove, and the fixed frame is compatible with the groove convex equipped with a circle with the contact portion of the fixing seat It rises.

4. molding machine according to claim 1, which is characterized in that further include for heating the inner cavity or the envelope Close the primary heater in space.

5. molding machine according to claim 1, which is characterized in that the Flexible Model about Ecology is high temperature flexible membrane.

6. molding machine according to claim 1, which is characterized in that the fusing point of the fixed model is higher than the molding of workpiece 1~5 times of temperature.

7. a kind of forming method, which is characterized in that using molding machine such as claimed in any one of claims 1 to 6 make workpiece at Type, the forming method the following steps are included:

The inner cavity is vacuumized at a temperature of keeping molding or is inflated to the inner cavity, making the Flexible Model about Ecology, deformation occurs And be pressed on workpiece, so that workpiece generates deformation and fits on the fixed model；

Stop heating, and when workpiece is cooled to preset calcining temperature, stopping vacuumizes or stops inflating to the inner cavity.

8. forming method according to claim 7, which is characterized in that the step of workpiece is heated to preheating temperature include:

Workpiece is put into secondary heater and is heated；

9. forming method according to claim 7, which is characterized in that vacuumize the inner cavity or filled to the inner cavity The step of gas includes:

When vacuumizing the inner cavity, starts evacuator, take out the inner cavity by preset atmospheric pressure value under forming temperature Vacuum；

When being inflated to the inner cavity, starts air compressor, filled by preset atmospheric pressure value to the inner cavity under forming temperature Gas；

10. forming method according to claim 7, which is characterized in that described to be equipped with described in the Flexible Model about Ecology Fixed frame is installed to the mode in the fixing seat as cylinder driving.