Precise plastic mold with exhaust structure

Abstract

The utility model relates to the technical field of plastic molds, and discloses a precise plastic mold with an exhaust structure, which comprises a mold base, a lower mold, a support top plate and an upper mold, the top of the mold base is in sliding connection with the lower mold through a plurality of positioning columns, the lower mold is driven to lift by a cylinder positioned at the center, and a rectangular exhaust inner cavity is arranged in the upper mold. Four connecting holes which are symmetrical about the center axis are connected with an exhaust pipe, a plurality of exhaust holes are formed in the cylindrical surface of the exhaust pipe, and an air suction hole is formed in the left end of the upper mold and connected with an air suction pump at the top end of the supporting top plate through a conveying pipe. After forming, the air cylinder drives the lower mold to descend and demold, the supporting top plate rotates to facilitate part taking, stable and smooth rotation is guaranteed through the structures such as the plastic bait ring, and efficient and precise plastic forming is achieved through cooperation of all the components.

Description

TECHNICAL FIELD

[0001] The utility model relates to plastic mould technical field, concretely is a precise plastic mould with exhaust structure. BACKGROUND

[0002] Injection mould is a tool for manufacturing plastic products, through injection molding machine, melt plastic material is injected into the mould cavity, and the required plastic product is formed after cooling and solidification, and the design and manufacturing precision of injection mould have important influence on the quality of plastic products.

[0003] The traditional technology exhaust effect is poor, when injection molding, cavity gas is difficult to exhaust, and product porosity, surface defects are easy to cause, reduce product precision and appearance quality, wherein, the operation stability is low, the lower mould lifting is easy to deviate, the mould opening and closing precision is insufficient, the forming quality is affected, and the demoulding is inconvenient, part of technology adopts the worker to take the piece difficultly, production efficiency is low, and the labor intensity is big, for this, we provide a precise plastic mould with exhaust structure. UTILITY MODEL CONTENTS

[0004] (I) technical problem solved

[0005] In view of the deficiencies of prior art, the utility model provides a precise plastic mould with exhaust structure, and solves the above problems.

[0006] (II) technical scheme

[0007] In order to realize the above purpose, the utility model provides the following technical scheme: a precise plastic mould with exhaust structure, including mould base, lower mould, support top plate and upper mould, the top of mould base is fixed with a plurality of positioning columns, the top end inside positioning column is slidably inserted with lower mould, the bottom end of lower mould is fixed with the piston shaft of cylinder, and the cylinder is installed at the top center of mould base, the bottom end left side of support top plate is fixed with support column, the tail end of support column is sleeved with shaft sleeve, the tail end of shaft sleeve and support column is installed in the left top end inside mould base, the bottom end of support top plate is screw mounted with upper mould, the inside of upper mould is provided with exhaust inner cavity, four center axis symmetrical exhaust pipes are installed in the inside of exhaust inner cavity, the top end of upper mould is fixed with injection pipe, and the injection pipe penetrates the top end of support top plate, the top end of support top plate is screw mounted with nut, the top end of support top plate is installed with air suction pump, and the air suction pump is connected with upper mould through the conveying pipe.

[0008] Preferably, the top right side of the mould base is fixed with four center axis symmetrical positioning columns, the inside of the positioning column is a hollow structure, four center axis symmetrical guide columns are fixed at the bottom end of the lower mould, the guide column is slidably inserted into the inside of the positioning column, and the center of the four positioning columns is installed with a cylinder, and the piston shaft of the cylinder is fixedly connected with the bottom end of the lower mould.

[0009] Preferably, the left top end of the mold base is provided with a rotating groove, an axle sleeve is arranged in the rotating groove, the bottom end of the supporting top plate is fixed with a supporting column, the end of the supporting column is inserted into the rotating groove, and the end of the supporting column is in clamping connection with the axle sleeve.

[0010] Preferably, the cylindrical surface of the supporting column is fixed with a glue bait ring, the bottom end of the glue bait ring is fixed with four connection columns which are symmetrically arranged around the center, the top end of the rotating groove is fixed with a connecting ring, a circular groove is arranged in the connecting ring, the connection columns are arranged in the circular groove and rotate in the circular groove, and the two ends of the glue bait ring are fixed to the outer side of the connecting ring through the fixing rods.

[0011] Preferably, the center of the supporting top plate is provided with a through hole, the top end of the upper mold is fixed with an injection pipe, the top end of the injection pipe is provided with external threads, the injection pipe is connected to the through hole, a nut is screwed on the threads of the injection pipe, and the upper mold is fixed to the bottom end of the supporting top plate through bolts.

[0012] Preferably, the inside of the upper mold is provided with a rectangular exhaust inner cavity, the lower end of the exhaust inner cavity is provided with connection holes which penetrate through the bottom end of the upper mold and are symmetrically arranged around the center, exhaust pipes are inserted into the connection holes, and a plurality of exhaust holes are arranged on the cylindrical surface of the exhaust pipes.

[0013] Preferably, the left end of the upper mold is provided with an air extraction hole which penetrates into the exhaust inner cavity, an air extraction pump is arranged on the top of the supporting top plate, the air extraction pump is connected to the air extraction hole of the left end of the upper mold through a conveying pipe.

[0014] (Three) beneficial effects

[0015] Compared with the prior art, the utility model provides a precise plastic mold with exhaust structure has the following beneficial effects:

[0016] 1、 the precise plastic mold with exhaust structure, the inside of the upper mold is provided with a rectangular exhaust inner cavity, the exhaust inner cavity is connected to the exhaust pipes through four connection holes which are symmetrically arranged around the center, a plurality of exhaust holes are arranged on the cylindrical surface of the exhaust pipes, in the injection process, the air originally existing in the cavity and the air wrapped in the plastic melt in the flowing process can enter the exhaust pipes through the exhaust holes and then gather in the exhaust inner cavity, at the same time, the air extraction pump on the top of the supporting top plate is connected to the air extraction hole of the left end of the upper mold through a conveying pipe, the air in the exhaust inner cavity is quickly extracted, a negative pressure is formed in the cavity, and the air extraction is accelerated, which effectively avoids the quality problems such as air holes and surface defects of products caused by air residues, ensures that the plastic melt can smoothly fill every corner of the cavity, and thus the precision and surface quality of the plastic product are remarkably improved.

[0017] 2、The precise plastic mold with exhaust structure, the positioning column on the top of the mold base and the guide column at the bottom end of the lower mold are in sliding fit, and the lower mold is driven to lift by the air cylinder, so that the mold opening and closing process is more accurate and stable, when the plastic injection is completed and cooled and solidified, the piston shaft of the air cylinder is contracted, the lower mold is pushed to move upwards along the positioning column, the product is gradually separated from the upper mold, the demolding is convenient, on the other hand, the support top plate is installed in the rotating groove at the top of the left side of the mold base through the support column and the shaft sleeve, and the rubber ring on the cylindrical surface of the support column and its related connecting structure ensure the stability and smoothness of the support top plate when rotating in the rotating groove with the support column as the shaft, the operator can take out the formed product more conveniently by rotating the support top plate, the production efficiency is improved, and the labor intensity is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of the utility model;

[0019] Figure 2 It is a structure sectional view schematic view of the utility model;

[0020] Figure 3 It is a structure split schematic view of the utility model;

[0021] Figure 4 It is a structure schematic view of the mold base of the utility model;

[0022] Figure 5 It is a structure schematic view of the support top plate of the utility model;

[0023] Figure 6 It is a structure sectional view schematic view of the upper mold of the utility model.

[0024] In the drawing: 1, mold base; 2, air cylinder; 3, lower mold; 4, conveying pipe; 5, air pump; 6, nut; 7, support top plate; 8, upper mold; 9, exhaust pipe; 10, injection pipe; 11, support column; 12, shaft sleeve; 13, positioning column; 14, rotating groove; 15, rubber ring; 16, exhaust inner cavity; 17, connecting hole; 18, air extraction hole. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0026] Please refer to Figures 1-6The utility model provides a precise plastic mold with exhaust structure, including mold base 1, lower mould 3, support top plate 7 and upper mould 8, the top of mold base 1 is fixed with a plurality of positioning column 13, the top end inside of positioning column 13 is slidably inserted with lower mould 3, the bottom end surface of lower mould 3 is fixed with the piston axle of cylinder 2, and the cylinder 2 is installed at the top center of mold base 1, the bottom end left side of support top plate 7 is fixed with support column 11, the end sleeve of support column 11 is sleeved with shaft sleeve 12, and the end of shaft sleeve 12 and support column 11 is installed in the left top inside of mold base 1, the bottom end of support top plate 7 is fixed with upper mould 8, the inside of upper mould 8 is provided with exhaust inner chamber 16, four center axis symmetries exhaust pipe 9 are installed in the inside of exhaust inner chamber 16, the top of upper mould 8 is fixed with injection tube 10, and injection tube 10 penetrates the top of support top plate 7, the top of support top plate 7 is fixed with nut 6, the top of support top plate 7 is installed with air pump 5, and air pump 5 is connected with upper mould 8 through the conveying pipe 4.

[0027] Further, the top right side of the mold base 1 is fixed with four center axis symmetrical positioning columns 13, the inside of the positioning column 13 is a hollow structure, the bottom end of the lower mold 3 is fixed with four center axis symmetrical guide columns, the guide columns are slidably inserted into the inside of the positioning column 13, and the center of the four positioning columns 13 is installed with a cylinder 2, the piston shaft of the cylinder 2 is fixedly connected with the bottom end of the lower mold 3, which realizes the precise lifting of the lower mold 3 along the positioning column 13 driven by the cylinder 2, guarantees the stability and accuracy of the mold opening and closing process, and provides a stable and reliable basis action for plastic forming.

[0028] Further, the left top end of the mold base 1 is provided with a rotating groove 14, the rotating groove 14 is installed with a shaft sleeve 12, the bottom end left side of the support top plate 7 is fixed with a support column 11, the end of the support column 11 is inserted into the inside of the rotating groove 14, and the end of the support column 11 is engaged with the shaft sleeve 12, which can rotate flexibly, facilitating the operator to take out the formed product, and improving the convenience of production operation.

[0029] Further, the cylindrical surface of the support column 11 is fixed with a rubber bait ring 15, the bottom end of the rubber bait ring 15 is fixed with four center axis symmetrical connecting columns, the top end of the rotating groove 14 is fixed with a connecting ring, the inside of the connecting ring is provided with a circular groove, the connecting column is installed in the inside of the circular groove, and the connecting column rotates in the inside of the circular groove, the two ends of the rubber bait ring 15 are fixed to the outside of the connecting ring through the fixing rod, which guarantees the stability and fluency of the support top plate 7 during rotation, avoids shaking or jamming during rotation, and improves the smoothness and efficiency of product taking operation.

[0030] Further, the center of the support top plate 7 is provided with a through hole, the top end of the upper mold 8 is fixed with an injection tube 10, the top of the injection tube 10 is provided with external threads, the injection tube 10 is connected through the through hole, the screw cap 6 is screwed with the top of the injection tube 10, and the upper mold 8 is fixed to the bottom end of the support top plate 7 through bolts, so that the upper mold 8 is stably connected with the support top plate 7, the stability of the position of the upper mold 8 during injection is guaranteed, and the installation and disassembly of the upper mold 8 are facilitated, and the maintenance and replacement of the mold are facilitated.

[0031] Further, the inside of the upper mold 8 is provided with a rectangular exhaust inner cavity 16, the lower end of the exhaust inner cavity 16 is provided with a connecting hole 17 penetrating the bottom end of the upper mold 8, the connecting hole 17 is symmetrically distributed around four central axes, the exhaust pipe 9 is inserted and fixed on the connecting hole 17, and a plurality of exhaust holes are formed in the cylindrical surface of the exhaust pipe 9. The exhaust pipe 9 can effectively collect and discharge the gas generated in the cavity during injection, avoid the product from having air holes, surface defects and other problems caused by gas remaining, and improve the quality and precision of the plastic product.

[0032] Further, the left end of the upper mold 8 is provided with an air extraction hole 18, and the air extraction hole 18 penetrates into the inside of the exhaust inner cavity 16. The top of the support top plate 7 is provided with an air extraction pump 5, the air extraction pump 5 corresponds to the air extraction hole 18 at the left end of the upper mold 8, and is connected through the delivery pipe 4. A negative pressure is formed in the cavity to accelerate the discharge of gas, effectively avoiding the product from having air holes, surface defects and other problems caused by gas remaining, and improving the forming quality of the plastic product.

[0033] Structure description:

[0034] Mold base 1: as the basic support structure of the whole mold, the top is fixed with a plurality of positioning columns 13, which is used for installing the lower mold 3 and the air cylinder 2, bearing the weight of each component of the mold, and ensuring the overall stability;

[0035] Air cylinder 2: installed on the top center of the mold base 1, the piston shaft is fixed with the bottom end of the lower mold 3, and the lower mold is driven to rise and fall through the telescopic drive, realizing the opening and closing action of the mold;

[0036] Lower mold 3: cooperates with the upper mold 8 to form a cavity, and is slidably connected with the positioning column 13 at the bottom end through a guide column, and is driven by the air cylinder 2, and is used for forming the lower half of the plastic product;

[0037] Delivery pipe 4: connecting the air extraction pump 5 and the air extraction hole of the upper mold 8, responsible for transmitting gas, quickly extracting the gas in the exhaust inner cavity, and realizing the negative pressure exhaust of the cavity;

[0038] Air extraction pump 5: installed at the top end of the support top plate 7, providing power for exhaust, quickly extracting the gas in the exhaust inner cavity through the delivery pipe 4, and avoiding defects caused by gas remaining in the product;

[0039] Nut 6: Threaded with the top of injection tube 10, matched with through hole and bolt, firmly fixed the upper mold 8 at the bottom end of support top plate 7, to ensure the stability of the upper mold 8 during injection;

[0040] Support top plate 7: The bottom end is installed on the mold base 1 through the support column 11 and the shaft sleeve, used to install the upper mold 8, and provides installation position for components such as air pump 5;

[0041] Upper mold 8: The inside is provided with an exhaust inner cavity, and the top end is fixed with the injection tube 10, which is combined with the lower mold 3 to form a mold cavity, used to form the upper half of the plastic product;

[0042] Exhaust pipe 9: Fixed at the bottom end of the upper mold 8 through the connecting hole, the cylindrical surface has a plurality of exhaust holes, which guide the cavity gas to the exhaust inner cavity, and assist in exhaust;

[0043] Injection tube 10: Fixed at the top end of the upper mold 8, penetrating through the support top plate 7, the top has external threads, used to inject molten plastic into the mold cavity;

[0044] Support column 11: Fixed at the bottom end of the left side of the support top plate 7, the end is connected with the shaft sleeve 12, the support top plate 7 rotates in the rotating groove with it as the shaft, facilitating the taking of parts;

[0045] Shaft sleeve 12: Installed in the rotating groove at the top end of the left side of the mold base 1, matched with the end of the support column 11, to ensure smooth and stable rotation of the support top plate 7;

[0046] Positioning column 13: Fixed on the top of the mold base 1, slidingly matched with the guide column of the lower mold 3, to ensure accurate lifting of the lower mold and precision of mold opening and closing;

[0047] Rotating groove 14: Opened at the top end of the left side of the mold base 1, the inside is installed with the shaft sleeve 12, to provide rotation space for the support top plate 7, facilitating the operation of taking out the product;

[0048] Bait ring 15: Fixed on the cylindrical surface of the support column 11, matched with the connecting ring at the top end of the rotating groove, to ensure stable and smooth rotation of the support top plate 7;

[0049] Exhaust inner cavity 16: Located inside the upper mold 8 in a rectangular shape, connected with the exhaust pipe through the connecting hole, to collect and discharge the cavity gas, improving the product quality;

[0050] Connecting hole 17: Four central axes are symmetrically distributed at the bottom end of the upper mold 8, used to insert and fix the exhaust pipe, so that the gas can flow into the exhaust inner cavity;

[0051] Exhaust hole 18: Located at the left end of the upper mold 8, penetrating to the exhaust inner cavity 16, connected with the conveying pipe 4, matched with the air pump 5 to realize rapid exhaust.

[0052] Working principle: mold preparation stage, cylinder 2 is in the initial extension state, the lower mold 3 is in the low position under the guidance of the positioning column 13, at this time, the support top plate 7 is stably installed in the rotating groove 14 at the left top end of the mold base 1 through the support column 11 and the shaft sleeve 12, the upper mold 8 has also been firmly installed at the bottom end of the support top plate 7 through the nut 6, and the injection pipe 10 penetrates the top end of the support top plate 7, everything is ready, waiting for the injection process to start, when the injection starts, the molten plastic is injected into the cavity formed by the upper mold 8 and the lower mold 3 through the injection pipe 10, if the air originally existing in the cavity and the gas wrapped in the plastic melt in the flow process are not discharged in time, it will cause quality problems such as air holes and surface defects of the product, at this time, the exhaust structure of the mold starts to play a role, the rectangular exhaust inner cavity 16 in the upper mold 8 is connected with the exhaust pipe 9 fixed at the lower end through four center axis symmetrical distribution connecting holes 17, the exhaust holes opened on the cylindrical surface of the exhaust pipe 9 can guide the gas in the cavity to the exhaust inner cavity 16, at the same time, the air pump 5 installed at the top end of the support top plate 7 starts to work, the air pump 5 is connected with the air exhaust hole 18 at the left end of the upper mold 8 through the conveying pipe 4, the gas in the exhaust inner cavity 16 is quickly exhausted, a negative pressure is formed in the cavity to accelerate the exhaust of the gas, and it is ensured that the plastic melt can smoothly fill every corner of the cavity, when the plastic injection is completed and cooled and solidified, the piston shaft of the cylinder 2 starts to shrink downward, pushes the lower mold 3 to move upward along the positioning column 13, because the lower mold 3 is in close contact with the product, in the shrinking process, the product gradually separates from the upper mold 8, at the same time, the support top plate 7 rotates in the rotating groove 14 with the support column 11 as the shaft, a certain angle is rotated, which is convenient for the operator to take out the molded product, the rubber bait ring 15 and its related connecting structure ensure the stability and smoothness of the rotation of the support top plate 7, in the whole process, the structures of the mold are matched with each other, and accurate mechanical movement and efficient exhaust design are realized.

[0053] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A precision plastic mold with exhaust structure, comprising a mold base (1), a lower mold (3), a support top plate (7) and an upper mold (8), characterized in that: The top of the mold base (1) is fixed with a plurality of positioning columns (13), the top end of the positioning column (13) is slidably inserted with a lower mold (3), the bottom end of the lower mold (3) is fixedly connected with the piston shaft of the air cylinder (2), and the air cylinder (2) is installed at the center of the top of the mold base (1). The bottom end of the supporting top plate (7) is fixed with a supporting column (11), the end of the supporting column (11) is sleeved with a shaft sleeve (12), the shaft sleeve (12) and the end of the supporting column (11) are installed inside the left top of the mold base (1), the bottom end of the supporting top plate (7) is threadedly installed with an upper mold (8), the inside of the upper mold (8) is provided with an exhaust inner cavity (16), the inside of the exhaust inner cavity (16) is installed with four exhaust pipes (9) which are symmetrically arranged around the center axis, the top end of the upper mold (8) is fixed with an injection pipe (10), and the injection pipe (10) penetrates the top end of the supporting top plate (7), the top end of the supporting top plate (7) is threadedly installed with a nut (6), the top end of the supporting top plate (7) is installed with a suction pump (5), and the suction pump (5) is connected with the upper mold (8) through a conveying pipe (4).

2. The precision plastic mold with exhaust structure according to claim 1, wherein: The top right side of the mold base (1) is fixed with four center axis symmetric positioning columns (13), the inside of the positioning column (13) is a hollow structure, the bottom end of the lower mold (3) is fixed with four center axis symmetric guide columns, the guide columns are slidably inserted into the inside of the positioning column (13), and the center of the four positioning columns (13) is installed with an air cylinder (2). The piston shaft of the air cylinder (2) is fixedly connected with the bottom end of the lower mold (3).

3. The precision plastic mold with exhaust structure according to claim 1, wherein: The left top of the mold base (1) is provided with a rotating groove (14), the inside of the rotating groove (14) is installed with a shaft sleeve (12), the bottom left side of the supporting top plate (7) is fixed with a supporting column (11), the end of the supporting column (11) is inserted into the inside of the rotating groove (14), and the end of the supporting column (11) is matched with the shaft sleeve (12).

4. The precision plastic mold with exhaust structure according to claim 3, wherein: The cylindrical surface of the supporting column (11) is fixed with a bait ring (15), the bottom end of the bait ring (15) is fixed with four center axis symmetric connecting columns, the top end of the rotating groove (14) is fixed with a connecting ring, the inside of the connecting ring is provided with a circular groove, the connecting columns are installed in the inside of the circular groove, and the connecting columns are rotationally matched in the inside of the circular groove. The two ends of the bait ring (15) are fixed to the outside of the connecting ring through fixing rods.

5. The precision plastic mold with exhaust structure according to claim 4, wherein: The center of the supporting top plate (7) is provided with a through hole, the top end of the upper mold (8) is fixed with an injection pipe (10), the top of the injection pipe (10) is provided with an external thread, the injection pipe (10) is connected through the through hole, the nut (6) is threadedly connected with the top of the injection pipe (10), and the upper mold (8) is fixed to the bottom end of the supporting top plate (7) through bolts.

6. The precision plastic mold with exhaust structure according to claim 5, wherein: The inside of the upper mold (8) is provided with a rectangular exhaust inner cavity (16), the lower end of the exhaust inner cavity (16) is provided with a connecting hole (17) penetrating the bottom end of the upper mold (8), and the connecting holes (17) are symmetrically distributed around the center axis, the exhaust pipes (9) are inserted and fixed in the connecting holes (17), and a plurality of exhaust holes are formed in the cylindrical surface of the exhaust pipe (9).

7. The precision plastic mold with exhaust structure according to claim 6, wherein: The left end of the upper mold (8) is provided with an air extraction hole (18) which penetrates to the inside of the exhaust inner cavity (16), and the top of the support top plate (7) is provided with an air extraction pump (5) which is connected with the air extraction hole (18) of the left end of the upper mold (8) in cooperation with the conveying pipe (4).

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