WO2017135625A1 - Dispositif d'injection pour matériau mélangé de résine synthétique comprenant un corps de poids - Google Patents

Dispositif d'injection pour matériau mélangé de résine synthétique comprenant un corps de poids Download PDF

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Publication number
WO2017135625A1
WO2017135625A1 PCT/KR2017/000808 KR2017000808W WO2017135625A1 WO 2017135625 A1 WO2017135625 A1 WO 2017135625A1 KR 2017000808 W KR2017000808 W KR 2017000808W WO 2017135625 A1 WO2017135625 A1 WO 2017135625A1
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Prior art keywords
synthetic resin
injection
mixer
mixed
frequency heater
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PCT/KR2017/000808
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English (en)
Korean (ko)
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송용재
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송용재
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Publication of WO2017135625A1 publication Critical patent/WO2017135625A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
    • B29C31/06—Feeding of the material to be moulded, e.g. into a mould cavity in measured doses, e.g. by weighting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/03—Injection moulding apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the present invention relates to a synthetic resin mixture material injection apparatus containing a non-body, more specifically, a non-composite composed of a mixer for mixing the synthetic resin and the non-polymer, and a molding machine for injection molding the synthetic resin and the non-solid polymer mixed in the mixer It relates to a synthetic resin material injection device included.
  • the counterweight to balance the weight is the balance weight (Balance Weight) produced by the extrusion method using the concrete as the main material and the counter balance (Counter Balance) manufactured by the casting method using the metal.
  • This conventional manufacturing method is low in productivity, high production costs due to the high cost of raw materials, and products that are manufactured and sold in the market are also detected harmful substances.
  • the balance weights are used for home appliances such as washing machines and dishwashers, and the counter balances are used for elevators, cranes, forklifts and other heavy equipment, and construction, building materials (brick, sidewalk blocks, tiles, ceiling materials), automobile industry, marine industry ( It can be applied to various industries such as aquaculture and fishery products.
  • balance weights and counter balances contain a non-body.
  • the non-body is added to give weight to the synthetic resin products.
  • the present technology is to manufacture and supply a substitute as a concrete substitute raw material.
  • Raw materials renewable energy resources iron ore sludges discarded in the iron ore industry, and various plastic resins (PP, PE, PC) to be discarded in the plastics industry) are utilized.
  • the product mold is installed in front of the nozzle formed in the front end of the injection plunger body in Korea Patent Publication No. 2005-0004709 and the plunger piston rod at the rear end
  • a connected hydraulic (pneumatic) cylinder (or injection sub-motor) is installed, and an inlet is formed in the upper side of the inlet, wherein the inlet is equipped with a heater attached to the main wall installed in the vertical direction and rotated by a low speed motor.
  • the outlet of the resistant mixed transfer cylinder is connected, and the inlet formed at the upper part of the mixed transfer cylinder is connected to the transfer pipe connected to the plastic extrusion cylinder with the heater attached to the main surface and the transfer pipe connected to the iron powder hopper attached to the heater on the main surface.
  • the extrusion cylinder is installed in the horizontal direction, the equal intervals are installed therein
  • An injection molding apparatus for a balance product in which iron powder is mixed with plastic raw materials characterized in that a hydraulic raw material (or pneumatic) cylinder (or injection sub-motor) is installed on the rod of the crew and a plastic raw material hopper having a feed amount adjustment device is installed on one side thereof.
  • Another conventional technique is to prepare a ceramic injection material having a high specific gravity used as fishing weight, fishing net weight, etc. in Korean Patent Publication No. 0332997;
  • the injection material is prepared by 24% of PVC, 20% of powder ceramics containing aluminum oxide, 50% of barium, 4% of DOA (Dioctyl Adipate), and 2% of stabilizer. While the DOA is introduced into the secondary at an internal temperature of about 100 ° C., the ceramic, barium, and stabilizer are added and mixed at a temperature of about 100 to 120 ° C., and the blended material is mixed at an internal temperature of about 195 ° C.
  • DOA Dioctyl Adipate
  • Method of manufacturing a ceramic injection material having a high specific gravity characterized in that it is added to the extruder to maintain the melt, mixer to extrude, and the extrudate extruded from the extruder to obtain a plate of a certain thickness, cooled, and pulverized It is open.
  • the synthetic resin mixed material containing the non-condensate of the prior art is difficult to manufacture because of the complex shape, and also has a disadvantage in that the productivity is low because the manufacturing process due to the complex shape takes a long time to manufacture the finished product.
  • the present invention has been made in order to solve the above problems, the production time is short, the production quantity can be increased, labor costs required for the existing mortar injection and extrusion method can be reduced, production time can be reduced, and when the failure occurs crushed and reused Therefore, it is possible to provide a synthetic resin injection molding apparatus containing a non-combustible material with high cost competitiveness by reducing product cost.
  • the present invention is a manufacturing method that uses the eco-friendly materials and renewable energy resources to inject into the production method compared to the conventional mortar injection extrusion injection method to increase the productivity, and to simplify the process steps to reduce labor costs, quality improvement due to reduced defect rate Has the effect of.
  • Figure 1 is a front view of the mixer installed in the synthetic resin mixture injection device containing the present invention non-body.
  • Figure 2 is a side view of the injection molding machine is installed in the synthetic resin mixture injection device containing the present invention non-body.
  • Figure 3 is a front view of the injection machine installed in the synthetic resin mixture injection device containing the present invention non-body.
  • Figure 4 is a schematic diagram showing an extrusion heating unit of the injection machine installed in the synthetic resin mixture injection device containing the present invention non-body.
  • Figure 5 is a perspective view of a preheater installed in the synthetic resin mixture injection device containing the present invention non-body.
  • Figure 6 is a side view of the preheater installed in the synthetic resin mixture injection device containing the present invention non-body.
  • Figure 7 is a schematic cross-sectional view according to another embodiment of the preheater installed in the synthetic resin material injection device containing a non-body present invention.
  • Figure 8 is a synthetic resin mixture injection device manufacturing process drawing containing the present invention non-body.
  • Synthetic resin mixture injection device comprising a non-body added to the synthetic resin to add weight to the present invention is a mixer 100 for mixing the synthetic resin and the non-body, and an injection molding machine for injection molding the synthetic resin and the non-body mixed in the mixer 100 Composed of 300, the mixer 100 is formed of an internal space is mixed with the synthetic resin and the non-hydrogen supplied in the inner space of the mixing tank 110, and the mixing tank 110, the amount of synthetic resin and specific gravity Composed of a pair of metering tank 120 for supplying a sieve, the injection machine 300 is an extrusion heating unit 310 for heating and melting a synthetic resin and a non-body mixed in a fixed amount, and the extrusion heating unit 310 It is characterized in that the molded part 320 for molding the molten synthetic resin and the non-body in the mold.
  • the extruder heating unit 210 of the injection machine 200 is a liquid state of the synthetic resin by heating the first hopper 211 and the first and second synthetic resin and the non-injector is injected into the first hopper 211 at a high frequency It consists of a first high-frequency heater 212, the first hopper 211 and the first high-frequency heater 212 between the synthetic resin and the non-body in the first hopper 311 the first high frequency heater A first transfer pipe 214 is installed to move to 212, and one end of the first high frequency heater 212 drives a transfer screw installed inside the first high frequency heater 212.
  • the first driving motor 213 is mounted to transport the synthetic resin melted in the non-body and the liquid phase.
  • a preheater 300 is formed between the mixer 100 and the injection machine 200 to melt the synthetic resin in a semi-solid state.
  • the preheater 300 is a synthetic resin mixed in a quantitative manner in the mixer 100.
  • a second hopper 310 into which the non-body is injected, and a second high frequency heater 330 to melt the synthetic resin in a semi-solid state by heating the non-body and the synthetic resin into the second hopper 310 at a high frequency.
  • the second transfer pipe may move between the second hopper 310 and the second high frequency heater 330 so that the synthetic resin and the non-solid resin in the semi-solid state in the second hopper 310 may move to the second high frequency heater 330.
  • 320 is installed, and the second driving motor 340 for driving the feed screw installed in the second high-frequency heater 330 is mounted on one end of the second high-frequency heater 230, specific gravity Transfer molten synthetic resin in sieve and semi-solid state The.
  • the metering tank 120 is installed on top of the mixing tank 110, consisting of a resin storage tank 121 for discharging the synthetic resin in a quantitative manner and a non-hydrogen storage tank 122 for discharging the non-hydrogen quantitatively
  • the resin storage tank 121 and the non-hydrogen storage tank 122 is installed so that a plurality of spaced apart a predetermined interval in the vertical direction so that the synthetic resin and the non-hydrogen by the resin storage tank 121 and the non-hydrogen storage tank 122 Characterized by the mixed tank 110 through a plurality of quantification steps.
  • Synthetic resin mixture manufacturing method containing a non-polymer is a step of injecting the synthetic resin and the non-polymer to the mixer 100; Step 2 of mixing the synthetic resin and the non-body in the mixer 100; Discharging the synthetic resin and non-hydrogen mixed in the mixer 100 in a quantitative manner; 4 steps of melting the synthetic resin discharged from the mixer (100); Forming a molten synthetic resin including a non-body into a finished product shape in an injection molding machine (300) equipped with a mold; Characterized in that it comprises a; six steps for cooling the molded finished product.
  • FIG. 1 is a front view of the mixer installed in the synthetic resin mixture injection apparatus containing the present invention non-body
  • Figure 2 is a side view of the injection molding machine is installed in the synthetic resin mixture injection apparatus including the present invention
  • Figure 3 is 4 is a schematic front view of an injection machine installed in a synthetic resin mixture injection apparatus including a non-inventive polymer
  • FIG. 4 is a schematic view showing an extrusion heating unit of an injection machine installed in a synthetic resin mixture injection apparatus including a non-polymer
  • Figure 6 is a side view of the preheater installed in a synthetic resin mixture injection device containing a non-polymer.
  • the injection device of the present invention comprises a mixer 100 for mixing a synthetic resin and a non-body, and an injection machine 300 for injection molding the synthetic resin and a non-body mixed in the mixer 100 have.
  • the mixer 100 has a mixing tank 110 in which an inner space is formed and mixed with a synthetic resin and a non-body supplied in the inner space, and a pair for supplying a fixed amount of synthetic resin and a non-body to the mixing tank 110.
  • a mixing tank 110 in which an inner space is formed and mixed with a synthetic resin and a non-body supplied in the inner space, and a pair for supplying a fixed amount of synthetic resin and a non-body to the mixing tank 110.
  • the injection molding machine 200 is an extruded heating unit 210 for heating and melting a synthetic resin and a non-hydrogen mixed in a fixed amount, and the synthetic resin and specific gravity melted in the extrusion heating unit 210
  • It is characterized by consisting of a molding unit 220 for molding a sieve from a mold.
  • the metering tank 120 is installed on the upper portion of the mixing tank 110, and is composed of a resin storage tank 121 for discharging the synthetic resin in a quantitative manner and a non-hydrogen storage tank 122 for discharging the non-liquid quantitatively. will be.
  • the resin storage tank 121 and the non-body storage tank 122 is a synthetic resin and the non-injection is added to the mixing tank 110, because the plurality is installed so as to be spaced apart a predetermined interval in the vertical direction resin storage tank 121 ) And the non-liquid storage tank 122 is subjected to a number of quantification steps.
  • the extruder heating unit 210 of the injection machine 200 is a liquid state of the synthetic resin by heating the first hopper 211 and the first and second synthetic resin and the non-injector is injected into the first hopper 211 at a high frequency Characterized in that it is composed of a first high-frequency heater 212 to be dissolved in.
  • a first transfer pipe 214 may move between the first hopper 211 and the first high frequency heater 212 to move the synthetic resin and the non-body in the first hopper 311 to the first high frequency heater 212.
  • one end of the first high-frequency heater 212 is equipped with a first drive motor 213 for driving the transfer screw installed in the inside of the first high-frequency heater 212 non-body and liquid The molten synthetic resin is transferred.
  • a preheater 300 for melting the synthetic resin in a semi-solid state.
  • the preheater 300 is a second hopper 310 to which the synthetic resin and the non-body is mixed quantitatively mixed in the mixer 100, and the non-hydrogen and the synthetic resin injected into the second hopper 310 by high frequency heating Characterized in that the second high-frequency heater 330 for melting the synthetic resin in a semi-solid state.
  • a second transfer between the second hopper 310 and the second high frequency heater 330 to move the synthetic resin and the non-solid body of the semi-solid state in the second hopper 310 to the second high frequency heater 330 A pipe 320 is installed, and a second driving motor 340 is installed at one end of the second high frequency heater 330 to drive a transfer screw installed in the second high frequency heater 330.
  • the molten synthetic resin is transferred to the non-solid and semi-solid state.
  • the injection molding machine 200 is able to injection molding products very quickly.
  • the first high frequency heater 212 and the second high frequency heater 330 are heated so that the internal temperature is 300 ⁇ 400 °C, the non-metal material is not melted, only the synthetic resin is melted.
  • the second hopper in the first transfer pipe 214 and the preheater 300 installed between the first hopper 211 and the first high frequency heater 212 of the extrusion heating unit 210 in the injection molding machine 200.
  • the second transport pipe 320 installed between the 320 and the second high frequency heater 330 is installed to be inclined so as to be able to move smoothly to the first high frequency heater 212 and the second high frequency heater 330. .
  • FIG. 7 is a schematic cross-sectional view according to another embodiment of the preheater installed in the apparatus for injecting a synthetic resin mixed material including the non-body of the present invention.
  • the second high-frequency heater 330 of the preheater 300 includes an upper tube 331 and a lower portion where the pair of upper flanges 333 and lower flanges 334 are contacted with each other. Consists of a tube 332, the end of the upper tube 331 protrudes further downward than the upper flange 333 is inserted into the inner diameter of the lower tube (332).
  • the outer diameter of the upper tube 331 and the inner diameter of the lower tube 332 is in contact with each other.
  • the protruding piece 335 protruding upward is formed at the edge of the lower flange 334 formed at the end of the lower tube 332, and the rotating piece 336 is formed at the upper end of the protruding piece 335. It is hinged to rotate up and down.
  • a ring-shaped latching jaw 337 is formed on the inner circumferential surface of the lower tube 332 so as to contact the end of the upper tube 331.
  • the upper flange 333, the lower flange 334 and the rotating piece 335 is formed with a through hole penetrating up and down, respectively, when the upper flange 333 and the lower flange 334 and the rotating piece 335
  • the through hole is located on the same vertical line.
  • the rotating piece 336 is divided into a plurality of fan-shaped, and each of the divided rotating piece is hinged to the protrusion piece 335, so that it can be rotated smoothly up and down by the hinge axis.
  • the upper tube 331 can be stably rotated in the desired direction while being inserted into the lower tube 332, the upper flange 333 and the lower flange 334 by rotating the upper tube 331 in the proper direction After matching the through-holes formed in each other, the screw is inserted into the through-hole and fastened with a nut, the upper tube 331 is to be more securely fastened to the lower tube (332).
  • the above-described configuration is not limited to the second high frequency heater 330 of the preheater 300, but may also be applied to the first high frequency heater 212 of the injection machine 200, and the upper tube 331 and the lower tube ( 332) is not composed of only a pair, but consists of a plurality of dogs, and when compared with a pair, the upper tube and the lower tube are located at a relatively higher side.
  • Figure 8 is a synthetic resin mixture manufacturing process chart containing the present invention non-body.
  • the synthetic resin mixture including the non-polymer added to the synthetic resin to add weight is a manufacturing method.
  • the synthetic resin and the non-polymer are introduced into the mixer 100.
  • the synthetic resin is to use any one of recycled polypropylene (PP: Polypropylen) and recycled polyethylene (PE: Polyethylene).
  • the synthetic resin mixture may further include a colorant, a filler, a processing aid, an antioxidant, and a compound, by weight% of a coloring agent of 0.3 to 5%, a filler of 10 to 20%, a processing aid of 0.2 to 1%, and an antioxidant of 0.2 to 0.5%.
  • Compound is 0.3 ⁇ 5% and made of synthetic resin.
  • non-body weight is 10 to 75% of the total weight of the synthetic resin mixture.
  • the non-body is to use either iron oxide or alumina oxide.
  • Colorants, fillers, processing aids, antioxidants, and compounds are conventional ones for PP or PE materials.
  • a colorant is a material used for coloring a colorant (plastic, rubber, paper, fiber, leather, etc.), and a filler is mainly used for the purpose of reducing costs, forming a viscosity of a synthetic resin, and preventing cracking of a cured resin.
  • the chemically inert substance to be added does not contribute to adhesion.
  • the coloring is not good, and if it is added in excess of 5% by weight, the effect of the coloring is not so large economically inefficient.
  • Pigments and dyes are used for coloring, and pigments include carbon black, titanium white, chromium furnace, and the like and oil-soluble dyes such as oil yellow, oil blue, and oil red.
  • the processing aid is to improve the processability of the synthetic resin and to facilitate the process of mixing molding, etc., when the addition is less than 0.2% by weight, the workability is inferior, when added in excess of 1% by weight is less effective than the amount added.
  • a processing aid a mixture of silica and silicon is used.
  • Fillers are added to improve the physical properties of the product to be molded, if less than 10% by weight is not effective, when added in excess of 20% by weight will change the original properties.
  • Fillers include glass fiber, calcium carbonate, talc, mica, silica, wood powder, chalk, and the like, and magnesium hydroxide (Mg (OH) 2) has recently been used.
  • Antioxidant is a substance that prevents the action of oxygen on various substances causing oxidation reaction at high temperature.
  • the antioxidant is added in less than 0.2% by weight, the oxidation reaction occurs well, and when it is added in excess of 0.5% by weight, the effect of the antioxidant is not great, so the cost-effectiveness is lowered.
  • the antioxidant is added in less than 0.2% by weight, the oxidation reaction occurs well, and when it is added in excess of 0.5% by weight, the effect of the antioxidant is not great, so the cost-effectiveness is lowered.
  • antioxidants pulmonary phenol, sulfur and phosphorus are mainly used, and FDA-approved phenolic antioxidants represented by BHT are mainly used.
  • the compound is a material that acts as a lubricant to help the synthetic resin and iron ore well mixed, if less than 0.3% by weight of the synthetic resin and iron ore is not mixed well, if more than 5% by weight is too thin.
  • the compound is made of lime powder, and silica (SiO 2 ) is added.
  • the synthetic resin and the non-hydrogen added to the mixer 100 are mixed in the mixer 100 as a two-step process.
  • the synthetic resin and the non-body mixed in the mixer 100 are quantitatively discharged in a three step process.
  • the synthetic resin discharged from the mixer 100 is melted in a four-step process.
  • Melting the synthetic resin and the non-body is carried out at 300 ⁇ 400 °C using a high frequency heater.
  • the non-body is a metal material, it does not melt.
  • the synthetic resin melted in the four-step process and the non-body is molded in the shape of the finished product in the injection molding machine 200 is equipped with a mold as a five-step process.
  • the present invention is a manufacturing method that uses the eco-friendly materials and renewable energy resources to inject into the production method compared to the conventional mortar injection extrusion injection method to increase the productivity, and to simplify the process steps to reduce labor costs, quality improvement due to reduced defect rate Has the effect of.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Robotics (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

La présente invention concerne un dispositif d'injection pour un matériau mélangé de résine synthétique qui comprend un corps de poids de manière à ajouter du poids à une résine synthétique et, plus spécifiquement, un dispositif d'injection, pour un matériau mélangé de résine synthétique qui comprend un corps de poids, comprenant : un mélangeur destiné à mélanger une résine synthétique et un corps de poids ; et une machine d'injection pour le moulage par injection de la résine synthétique et du corps de poids mélangés dans le mélangeur. Le mélangeur comprend : une cuve de mélange qui possède un espace intérieur et le corps de poids et la résine synthétique apportés mélangés dans l'espace intérieur ; et une paire de réservoirs de mesure qui servent à apporter une quantité fixe de la résine synthétique et du corps de poids au réservoir de mélange. La machine d'injection comprend : une unité de chauffage-extrusion qui sert à fondre la résine synthétique et le corps de poids, qui ont été mélangés dans la quantité fixe, par chauffage de ceux-ci ; et une unité de moulage qui sert au mouler, dans un moule, la résine synthétique et le corps de poids qui ont été fondus dans l'unité de chauffage-extrusion. La présente invention concerne une préparation par injection à l'aide d'un matériau écologique et de ressources énergétiques renouvelables et permet d'augmenter la productivité par réduction du temps de production par rapport à l'extrusion et l'injection de mortier existants. Et la présente invention permet une amélioration de la qualité du fait d'une réduction des coûts de main-d'oeuvre et du taux de pertes par simplification d'étapes de processus. En outre, la compétitivité des coûts du fait d'une réduction des coûts de traitement des déchets et des matières premières peut être obtenue par le broyage et la réutilisation d'un matériau traité en cas de défaut.
PCT/KR2017/000808 2016-02-04 2017-01-24 Dispositif d'injection pour matériau mélangé de résine synthétique comprenant un corps de poids WO2017135625A1 (fr)

Applications Claiming Priority (2)

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KR10-2016-0014516 2016-02-04
KR1020160014516A KR101699660B1 (ko) 2016-02-04 2016-02-04 비중체가 포함된 합성수지 혼합재료 사출장치

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Publication number Priority date Publication date Assignee Title
CN109605674A (zh) * 2018-11-24 2019-04-12 乐清市嘉得电子有限公司 一种塑件生产设备及其生产工艺
CN109605674B (zh) * 2018-11-24 2021-01-26 乐清市嘉得电子有限公司 一种塑件生产设备及其生产工艺

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