CN217553015U - Injection mold with fixed mold side hydraulic cylinder for first drawing and demolding - Google Patents

Abstract

The utility model discloses an injection mold who has cover half side pneumatic cylinder to take out earlier drawing of patterns relates to injection mold technical field, including the cover half fixed plate, the mouth of moulding plastics, movable mould fixed plate and guide pillar, the lower extreme fixed mounting of cover half fixed plate has the fixed die plate, and the fixed die plate right side is equipped with cover half and takes out mechanism and pneumatic cylinder earlier, and the top of movable mould fixed plate is fixed with the movable mould board through the cushion connection, and the fixed mounting of center department of movable mould board has the movable mould core, has worn oblique top mechanism and ejector pin in the movable mould board, and oblique top mechanism and ejector pin are all installed on the dough sheet, and dough sheet below fixed mounting has the dough needle bottom plate. The utility model discloses can utilize the pneumatic cylinder under the condition of a parting face mould, realize the core of cover half and take out the drawing of patterns earlier before the die sinking, avoid injection moulding's product to glue on the cover half at the die sinking in-process, reduce cost to overcome the condition that is not according to the die sinking in order now, reduce the cost of enterprise, and this stable in structure, the maintenance cycle is long, the batch production of especially adapted this type of product.

Description

Injection mold with fixed mold side hydraulic cylinder for first drawing and demolding

Technical Field

The utility model relates to an injection mold technical field specifically is an injection mold who has cover half side pneumatic cylinder to take out earlier drawing of patterns.

Background

More and more parts of present industry are the plastics material, consequently, the continuous development of the trade of moulding plastics, there is a big recess and inside casing that has the side recess on the present part, it is obvious, the cover half side has bellied core, generally, in order to prevent that the product from sticking in the cover half when the die sinking, can increase and be moving, the structure of cover half core is taken out earlier before the cover half separates, the die carrier structure of three fens of face is adopted more this moment, thus, at first with high costs, secondly, after longer production capacity, when mostly being about 8000 pieces, the condition according to not opening the die in order can appear, and more serious more of a specified duration, make the maintenance cost show and improve. In order to improve the production efficiency, the embodiment adopts a bisection type die frame structure and a core technology of firstly drawing the inclined surface of the hydraulic cylinder, so that the cost is reduced, the condition that the die opening is not performed in sequence at present is overcome, and technicians of the company specially design a special die for the part, so that the maintenance cost is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an injection mold who has cover half side pneumatic cylinder to take out the drawing of patterns earlier to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an injection mold who has cover half side pneumatic cylinder to take out drawing of patterns earlier, includes cover half fixed plate, the mouth of moulding plastics, movable mould fixed plate and guide pillar, the lower extreme fixed mounting of cover half fixed plate has the fixed die plate, the inside right side of fixed die plate is equipped with the cover half and takes out the mechanism earlier, the cover half takes out mechanism right side earlier and is connected with the pneumatic cylinder, pneumatic cylinder fixed mounting is on the outside right side of fixed die plate, the top of movable mould fixed plate is fixed with the movable mould board through the cushion connection, the center department fixed mounting of movable mould board has the movable mould core, wear to one side in the movable mould core and pushed up mechanism and ejector pin, to one side pushed up mechanism and ejector pin all install on the face faller, face faller below fixed mounting has the face needle bottom plate.

Further: the fixed die first-pumping mechanism comprises a wedge block and a first-pumping core, a T-shaped groove is formed in the upper end of the first-pumping core and is installed on the wedge block, and the right end of the wedge block is fixedly connected with the head of the hydraulic cylinder through a T-shaped connector.

Further: the angle lifter mechanism is characterized in that an angle lifter is included, a bottom sliding block is arranged at the lower end of the angle lifter, sliding grooves are formed in two sides of the bottom sliding block, and a pin column penetrates through the lower end of the angle lifter and is installed in the sliding grooves in a sliding mode.

Preferably: the middle upper end of the oblique ejector rod is provided with a fixed oblique block, the right side of the fixed oblique block is attached to the left side of the oblique ejector rod, the fixed oblique block is fixedly installed below the movable mold core, and the bottom sliding block is fixedly installed on the surface needle plate.

Preferably, the following components: return rods are installed on two sides of the face needle plate, return springs are installed on the return rods and located between the face needle plate and the movable die plate, and the guide columns are fixedly installed at four corner points above the movable die plate.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses the design has the cover half to take out mechanism and push up two important mechanisms of mechanism to one side earlier, can utilize the pneumatic cylinder under the condition of a parting face mould, realizes that the core of cover half takes out the drawing of patterns earlier before the die sinking, avoids injection moulding's product to glue on the cover half at the die sinking in-process, reduce cost to overcome the condition that the die sinking is not according to the order now, reduce the cost of enterprise, and this stable in structure, the maintenance cycle length is very suitable for the batch production of this type of product.

Drawings

FIG. 1 is a sectional view of the present invention;

FIG. 2 is a schematic view of the structure below the parting plane;

FIG. 3 is a schematic view of a fixed mold first pumping mechanism;

FIG. 4 is an enlarged view taken at A-A;

FIG. 5 is a schematic view of a portion of a motionless mold core;

FIG. 6 is an enlarged view of B;

FIG. 7 is a schematic view of a pitched roof mechanism;

FIG. 8 is a schematic view of a bottom slider;

fig. 9 is a schematic view of parts.

In the figure: 1. the injection molding machine comprises a fixed die fixing plate, 2, an injection molding nozzle, 3, a fixed die first-drawing mechanism, 4, a fixed die plate, 5, a movable die plate, 6, a movable die core, 7, an inclined ejector mechanism, 8, a return rod, 9, a thimble plate, 10, a thimble bottom plate, 11, a movable die fixing plate, 12, an ejector rod, 13, a hydraulic cylinder, 14, a guide pillar, 15, a cushion block, 16, a T-shaped connector, 17, a part, 301, a wedge block, 302, a first-drawing core, 303, a T-shaped groove, 701, an inclined ejector rod, 702, a fixed inclined block, 703, a bottom slider, 704, a pin column, 705, a sliding groove, 171, a large groove, 172 and a side groove.

Detailed Description

The present invention will be described based on embodiments with reference to the drawings in the embodiments of the present invention, but it should be understood that the present invention is not limited to these embodiments, and some specific details will be described in detail in the following description of the present invention, however, those skilled in the art can fully understand the present invention for the parts which are not described in detail.

Furthermore, those skilled in the art will appreciate that the drawings are provided for purposes of illustrating the objects, features, and advantages of the invention and are not necessarily drawn to scale.

Also, unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is meant by "including but not limited to".

Referring to fig. 1 to 9, the present invention provides a technical solution: including cover half fixed plate 1, the mouth 2 of moulding plastics, movable mould fixed plate 11 and guide pillar 14, the lower extreme fixed mounting of cover half fixed plate 1 has fixed die plate 4, the inside right side of fixed die plate 4 is equipped with the cover half and takes out mechanism 3 earlier, the cover half takes out mechanism 3 right side earlier and is connected with pneumatic cylinder 13, pneumatic cylinder 13 fixed mounting is on the outside right side of fixed die plate 4, the top of movable mould fixed plate 11 is connected through cushion 15 and is fixed with movable mould board 5, the center department fixed mounting of movable mould board 5 has movable mould core 6, wear in the movable mould core 6 and push rod 7 and ejector pin 12 to one side, push rod mechanism 7 and ejector pin 12 all install on face faller 9 to one side, fixed mounting has face faller bottom plate 10 below 9.

The fixed die first-pulling mechanism 3 comprises a wedging block 301 and a first-pulling core 302, a T-shaped groove 303 is formed in the upper end of the first-pulling core 302 and is installed on the wedging block 301, and the right end of the wedging block 301 is fixedly connected with the head of the hydraulic cylinder 13 through a T-shaped connector 16.

The inclined top mechanism 7 comprises an inclined top rod 701, a bottom sliding block 703 is arranged at the lower end of the inclined top rod 701, sliding grooves 705 are formed in two sides of the bottom sliding block 703, and a pin 704 penetrates through the lower end of the inclined top rod 701 and is installed in the sliding grooves 705 in a sliding mode.

4 the middle upper end of the oblique ejector rod 701 is provided with a fixed oblique block 702, the right side of the fixed oblique block 702 is attached to the left side of the oblique ejector rod 701, the fixed oblique block 702 is fixedly arranged below the movable mold core 6, and the bottom sliding block 703 is fixedly arranged on the flour needle plate 9.

Return rods 8 are mounted on two sides of the needle board 9, return springs are mounted on the return rods 8 and located between the needle board 9 and the movable die plate 5, and the guide posts 14 are fixedly mounted at four corner points above the movable die plate 5.

Firstly, the size of the required hydraulic cylinder 13 needs to be calculated, and the structure is calculated as follows:

the injection projection area of the large groove 171 on the part 17 is 18 square centimeters, the pressure of the cavity of the general injection mold is 500 kilograms per square centimeter, and the force applied to the fixed mold to withdraw the mold core to the outside of the cavity is as follows: 18 × 500=9000 kg.

The inclined plane on the back of the fixed die first-taking core is 8 degrees, so that the motion direction of the first-taking core vertical to the fixed die needs to be

The minimum force to be provided is 9000 × tan8 ° =9000 × 0.145=1265 kg.

The piston diameter of the hydraulic cylinder in this row is 50 mm =5 cm, its area is:

2.5 x 3.14=19.625 square cm, the hydraulic pressure of a typical injection machine is 80 kg per square centimeter

Square centimeter, the ejection force of the cylinder is 19.625 x 80=1570 kg.

This is done by: the minimum force required to be provided perpendicular to the direction of the fixed mold pull core movement is 1265 kilograms. The ejection force of the hydraulic cylinder is 1570 kg, 1570/1265=1.24 times. Enough not to retreat.

The distance that the fixed mold on the fixed mold first-pulling structure 3 in the row firstly pulls out the core 302 does not need to be completely pulled out of the cavity, and generally the distance is 50% of the distance that the core packing force is almost zero, the remaining packing force is almost zero at the position, the packing force on the movable mold core 6 can be completely overcome, and the product cannot be left in the fixed mold at a very large probability. The extraction distance at this position is determined by the draft and shrinkage.

In this row, the maximum dimension of the first-drawing core 302 in the direction is 64 mm, the single-side 2 ° and double-side 4 ° of the mold release slope and the shrinkage rate is 0.015, then the shrinkage dimension is 64 × 0.015=0.96 mm, and 0.5 times of the distance to be released when the mold release slope is expanded by 0.96 mm is:

(0.96/tan 4 °) 0.5=0.96/0.699 =0.5 mm. The stroke of the hydraulic cylinder is set to be 50 mm, the locking inclined plane is 8 degrees, and the distance for firstly drawing the core out of the fixed die is as follows:

tan8 ° × 50=0.1405 × 50=7.027 mm. The calculation result can be demonstrated through the method, and the requirements are met.

The structure of the part 17 to be injection molded is also complicated by the use of the mechanism 3 for pre-drawing the fixed mold and the mechanism 7 for slanting top, the condition shown in figure 9 being the condition after the mold closes and the plastic product is frozen and then water is poured off. To the technical personnel in the field, the utility model discloses a monolithic installation belongs to the conventional operation on the injection molding machine, and detailed process is not being repeated, and holistic mould is fixed on the injection molding machine through moving the fixed plate of fixed die plate, and the compound die is moulded plastics. Before the die is opened, the fixed die first-pumping mechanism 3 fixed on the fixed die part firstly acts: the high-pressure hydraulic oil is switched to an oil inlet in the front of the hydraulic cylinder through an electromagnetic valve for controlling the action of the hydraulic cylinder 13, the piston of the hydraulic cylinder 13 moves towards the right side, the fixed die first-drawing core 302 moves upwards through the T-shaped connector 16 and the wedge block 301 which are connected with the hydraulic cylinder 13, and the inclined T-shaped groove 303 on the wedge block 301, and when the fixed die first-drawing core moves to a proper position, the piston of the hydraulic cylinder 13 also returns to the limit of the rear part of the cylinder body, so that the first-drawing action is completed. The fixed die first pulls out the core 302 to partially separate from the corresponding part on the product, so that the packing force is almost zero. The mold starts to open the mold, the fixed mold is moved, the fixed mold is separated from a parting surface, when the mold is opened to a proper position, the mold opening is stopped, the ejector mechanism on the movable mold side of the injection molding machine acts, the ejector rod is abutted against the ejector pad block to push the thimble bottom plate 10 and the thimble plate 9, the ejector rod 12 on the ejector rod is driven by overcoming the spring pressing force on the return rod 8, the inclined ejector rod 701 ejects a product shrunk on the movable mold core 6 from the outer surface of the mold core, the inclined ejector rod 701 moves along the inclined surface on the fixed inclined block 702 and the bottom slide block 703 and the pin column 704 below the inclined ejector rod to realize ejection and retraction at the same time, so that the product side groove 172 starts to separate and continuously ejects, and reaches a proper height, so that the product is completely separated from the side protruding positions of the movable mold core 6 and the inclined ejector rod 701, the action is stopped, at the product and the sprue condensate can be easily taken out from the mold, at the time, the ejector mechanism of the injection molding machine retreats and resets with the thimble bottom plate 10, the thimble plate 9 and the ejector rod 12 on the inclined ejector mechanism 7 under the action of the elastic force of the return rod 8. After the injection machine is reset, the injection machine starts to close the mold, generally, when the mold is closed, high-pressure hydraulic oil is switched to an oil inlet at the rear part of the hydraulic cylinder 13 through an electromagnetic valve controlling the action of the hydraulic cylinder 13, when the high-pressure hydraulic oil acts on the back surface of a piston, the piston of the hydraulic cylinder 13 is driven to move towards the left side through a wedge block 301 connected with the wedge block 301, the fixed mold pre-drawing core 302 moves downwards through the T-shaped connector 16, the wedge block 301 and an inclined T-shaped groove 303 on the wedge block 301, when the fixed mold pre-drawing core 302 moves to a proper position, the piston of the hydraulic cylinder 13 returns to the limit of the front part of the cylinder body, and the fixed mold pre-drawing core 302 is pressed downwards, at the moment, the upper side of the fixed mold pre-drawing core 302 is in close contact with the inclined surface of the wedge block 301, the inclined surface is provided with pressure provided by the hydraulic cylinder 13, the angle of the inclined surface is increased, the reaction force of the direction of the opposite to the cavity direction, and the reaction force is offset by a fixed mold wear-resisting plate and a fixed plate above the wedge block 301. Thus, the resetting and the locking of the fixed die first-drawing structure 3 are completed, and the fixed die first-drawing structure is ready for injecting the molten plastic again.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides an injection mold who has first drawing of patterns of cover half side pneumatic cylinder, includes cover half fixed plate (1), moulds plastics mouth (2), movable mould fixed plate (11) and guide pillar (14), its characterized in that: the utility model discloses a fixed die structure, including fixed die fixed plate (1), the lower extreme fixed mounting of fixed die fixed plate (1) has fixed die plate (4), the inside right side of fixed die plate (4) is equipped with the fixed die and takes out mechanism (3) earlier, the fixed die takes out mechanism (3) right side earlier and is connected with pneumatic cylinder (13), pneumatic cylinder (13) fixed mounting is in the outside right side of fixed die plate (4), the top of movable die fixed plate (11) is connected through cushion (15) and is fixed with movable mould board (5), the center department fixed mounting of movable mould board (5) has movable mould core (6), wear in movable mould core (6) to one side roof mechanism (7) and ejector pin (12), to one side roof mechanism (7) and ejector pin (12) are all installed on face faller (9), fixed mounting has face faller bottom plate (10) below face faller (9).

2. An injection mold having a stationary mold side hydraulic cylinder for pre-extraction mold release as set forth in claim 1, wherein: the fixed die first-pulling mechanism (3) comprises a wedge block (301) and a first-pulling core (302), wherein a T-shaped groove (303) is formed in the upper end of the first-pulling core (302) and is installed on the wedge block (301), and the right end of the wedge block (301) is fixedly connected with the head of the hydraulic cylinder (13) through a T-shaped connector (16).

3. An injection mold having a stationary mold side hydraulic cylinder for pre-extraction mold release as set forth in claim 1, wherein: the inclined ejection mechanism (7) comprises an inclined ejection rod (701), a bottom sliding block (703) is arranged at the lower end of the inclined ejection rod (701), sliding grooves (705) are formed in two sides of the bottom sliding block (703), and a pin column (704) penetrates through the lower end of the inclined ejection rod (701) and is installed in the sliding grooves (705) in a slidable mode.

4. An injection mold having a stationary mold side hydraulic cylinder for pre-extraction mold release according to claim 3, wherein: the middle upper end of the oblique ejector rod (701) is provided with a fixed oblique block (702), the right side of the fixed oblique block (702) is attached to the left side of the oblique ejector rod (701), the fixed oblique block (702) is fixedly installed below the movable mold core (6), and the bottom sliding block (703) is fixedly installed on the face needle plate (9).

5. An injection mold having a stationary mold side hydraulic cylinder for pre-extraction mold release as set forth in claim 1, wherein: return rods (8) are installed on two sides of the face needle plate (9), return springs are installed on the return rods (8), the return springs are located between the face needle plate (9) and the movable die plate (5), and the guide columns (14) are fixedly installed at four corner points above the movable die plate (5).

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