CN210552805U - Rear mould elastic block mechanism - Google Patents

Abstract

The utility model discloses a back mould bullet piece mechanism relates to injection mold application technique field, which comprises a pane, set up the A board and the parallel setting B board in the A board below on the panel, the bottom of A board sets up front mould benevolence, the top of B board is provided with the back mould benevolence corresponding with front mould benevolence, the product is located between front mould benevolence and the back mould benevolence during the compound die, during the die sinking, stir the bullet piece by the inserted bar, compression spring is to the side motion of keeping away from the ejector pin, make bullet piece and ejector pin break away from, the ejector pin can be because can not receive the support of bullet piece and the same downstream of B board this moment, it is ejecting with the product that the ejector pin board drives the thimble down to go up this moment, accomplish the product and break away from, under the product bulk production condition, the damage that the spring fatigue brought has been avoided, mould life and product percent.

Description

Rear mould elastic block mechanism

Technical Field

The utility model relates to a mould application technology field especially involves back mould bullet piece mechanism.

Background

With the development of the injection molding industry, some mold automation appears, which puts higher demands on the mold design structure. The mold of the back mold elastic block mechanism is more and more widely applied in the production of injection molds, and as the product is a deep cavity, in order to ensure the characteristics of the product, the ejector pin marks on the ejection surface of the product in demolding are prevented, and the mold back mold insert needs to be ejected after being firstly separated from the deep cavity by one section so as to meet the product appearance of customer requirements.

When the existing mold is opened, the injection molding machine table drives the front mold and the rear mold to open the mold for the first time, meanwhile, the rear mold insert is fixed on the base plate and does not move, the spring pushes the plate B to move upwards under the action of the spring, so that a product is separated from one end of the rear mold insert, the mold is opened for the second time, and after the secondary mold opening is completed, the ejector rod pushes the upper ejector retainer plate and the lower ejector retainer plate to drive the ejector pins to eject the product, so that the product is separated. Because the secondary die sinking is accomplished through the spring to current structure, under the bulk production condition, the spring is tired very easily, greatly reduced the life of mould, when the spring is tired, the product is pulled very easily, and product quality is difficult to guarantee, has reduced product production efficiency. Therefore, it is necessary to provide a new rear module spring block mechanism for overcoming the shortcomings of the prior art.

SUMMERY OF THE UTILITY MODEL

For solving the problem that prior art exists, the utility model aims at providing a back module bullet piece mechanism, its simple structure, production convenience, processing cost hang down.

In order to achieve the purpose, the rear mould elastic block mechanism of the utility model comprises a panel, an A plate arranged on the panel and a B plate arranged below the A plate in parallel, wherein the bottom of the A plate is provided with a front mould core, the top of the B plate is provided with a rear mould core corresponding to the front mould core, a product is positioned between the front mould core and the rear mould core during mould closing, two rear mould inserts are vertically arranged in the rear mould core, the bottom of the rear mould insert is horizontally provided with a backing plate, the backing plate and the rear mould inserts are fixedly connected, the backing plate is arranged under the B plate in parallel, the left side and the right side of the backing plate are provided with slotted holes in a penetrating way, an ejector rod vertically penetrates through the inner part of the slotted holes, the top of the ejector rod is fixedly connected with the bottom of the B plate, the left end and the right end of the bottom of the backing plate are symmetrically fixed with an inserting rod, the inserting rod is of a hollow structure, the, the lateral wall horizontal connection spring of bullet piece, the below level of backing plate sets up thimble board and lower thimble board, and spring horizontal connection is on last thimble board, goes up the left and right sides of thimble board and all sets up the first through-hole that corresponds with the ejector pin, the second through-hole that corresponds with the inserted bar, and also set up the first through-hole and the second through-hole the same with last thimble board horizontal position on the thimble board down, goes up the perpendicular welding thimble in middle part of thimble board, and the thimble passes the middle part of backing plate and stretches into in the back mould benevolence.

Preferably, the vertical height of the rear mold insert is flush with the vertical height of the rear mold core when the mold is closed.

Preferably, the thimble is the cylinder structure, and the bottom of thimble lateral wall is the concave breach that is the rectangle structure that establishes, and the specification of breach and the specification looks adaptation of bullet piece, and the side block of bullet piece is in the breach of same one side thimble bottom during the compound die.

Preferably, the inserted bar is close to the lateral wall bottom of spring and sets up the bevel connection, and the top of bevel connection is the slope setting, and the side of bevel connection is perpendicular setting, and the top height of bevel connection is the same with the height in bar groove, leans on the position of spring to set up the recess that is the slope structure in the middle of the bullet piece, and the inclination of recess hypotenuse is the same with the angle of bevel connection top slope.

Preferably, the bottom of the plate A is in a splayed structure and is symmetrically provided with two clamping pins, the plate B is symmetrically provided with two inclined clamping grooves, and the straight lines of the clamping pins are the same as the diameters of the clamping grooves.

The utility model discloses a back mould bullet piece mechanism has following beneficial effect:

1. under the condition of mass production of products, the damage caused by the fatigue of the spring is avoided, the service life of the die is prolonged, the product percent of pass is improved, the production efficiency is improved, a large amount of manpower and material resources are reduced, and the cost is saved.

2. The mechanism is simple to machine, convenient to install and disassemble and low in machining cost, reduces a large amount of manpower consumption and operation cost, and avoids the phenomenon of frequently repairing the die.

Drawings

Fig. 1 is a schematic view of the overall structure of the rear module spring block mechanism provided by the present invention.

Fig. 2 is a schematic structural diagram of the rear mold spring block mechanism in fig. 1 after the first mold opening and the second mold opening.

Fig. 3 is a schematic diagram of the structure of the rear module spring block mechanism in fig. 1 in which the spring block and the ejector rod fall off.

Fig. 4 is an enlarged detail view of the rear module spring block mechanism a of fig. 1.

The corresponding part names indicated by the numbers and letters in the drawings: 1. a panel; 2. a, a plate; 3. a front mold core; 4. a rear mold core; 5. b, plate; 6. a rear mold insert; 7. a base plate; 8. a top rod; 9. inserting a rod; 10. A spring block; 11. an upper ejector plate; 12. a lower ejector plate; 13. spring, 14, thimble.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further described with reference to the drawings and the specific embodiments.

As shown in figures 1-4, the utility model provides a back mould elastic block mechanism, which comprises a panel, an A plate arranged on the panel and a B plate arranged in parallel below the A plate, wherein the bottom of the A plate is provided with a front mould core, the top of the B plate is provided with a back mould core corresponding to the front mould core, a product is positioned between the front mould core and the back mould core when in mould closing, two back mould inserts are vertically arranged in the back mould core, the bottom of the back mould insert is horizontally provided with a backing plate which is fixedly connected with the back mould insert, the backing plate is arranged in parallel under the B plate, the left side and the right side of the backing plate are provided with slotted holes in a penetrating way, a mandril vertically passes through the inner part of the slotted holes, the top of the mandril is fixedly connected with the bottom of the B plate, the left end and the right end of the bottom of the backing plate are symmetrically fixed with inserting rods which are of a hollow structure, the, the bottom of bullet piece block thimble, the lateral wall horizontal connection spring of bullet piece, the below level of backing plate sets up thimble board and lower thimble board, and spring horizontal connection is on last thimble board, go up the left and right sides of thimble board and all offer the first through-hole that corresponds with the ejector pin, the second through-hole that corresponds with the inserted bar, and also offer the first through-hole and the second through-hole the same with last thimble board horizontal position on the thimble board down, the middle part vertical welding thimble of going up the thimble board, and the thimble passes in the middle part of backing plate stretches into the back mould benevolence.

As a technical optimization scheme of the utility model, the vertical height of back mould mold insert flushes with the back mould benevolence vertical height during the compound die.

Through adopting above-mentioned technical scheme to can guarantee that back mould mold insert can not stretch out back mould benevolence, make the product can tile and process on back mould benevolence.

As a technical optimization scheme of the utility model, the thimble is the cylinder structure, and the concave breach that is the rectangle structure of establishing in the bottom of thimble lateral wall, and the specification of breach and the specification looks adaptation of bullet piece, the side block of bullet piece is in the breach with one side thimble bottom during the compound die.

Through adopting above-mentioned technical scheme to can utilize the breach to come the block bullet piece, when making the bullet piece rebound, the bullet piece can promote thimble rebound.

As a technical optimization scheme of the utility model, the inserted bar is close to the lateral wall bottom of spring and sets up the bevel connection, and the top of bevel connection is the slope setting, and the side of bevel connection is perpendicular setting, and the top height of bevel connection is the same with the height in bar groove, leans on the position of spring to set up the recess that is the slope structure in the middle of the bullet piece, and the inclination of recess hypotenuse is the same with the angle of bevel connection top slope.

Through adopting above-mentioned technical scheme to when the inserted bar contacts with bullet piece, the inserted bar can utilize the bevel connection to remove bullet piece to the one side of keeping away from the ejector pin, makes bullet piece can separate with the ejector pin.

As a technical optimization scheme of the utility model, the bottom of A board is "eight" font structural symmetry and sets up two bayonet locks, and the symmetry sets up the draw-in groove of two slopes on the B board, and the craspedodrome of bayonet lock is the same with the diameter of draw-in groove.

Through adopting above-mentioned technical scheme to can utilize bayonet lock block draw-in groove to guarantee that whole mould is when the compound die, A board and B board can remove along fixed track, make inseparabler that the back mould benevolence on the preceding mould benevolence on the A board and the B board can the pressfitting.

The utility model discloses a back mould bullet piece mechanism, when the compound die, the injection molding board drives the front mould benevolence on the A board and the back mould benevolence on the B board to draw close each other and press the film of product, when the first die sinking, the injection molding board drives the front mould benevolence and the back mould benevolence to separate, the bullet piece block is in the bottom of push rod at this moment, and the inserted bar does not contact with the bullet piece, when the second die sinking, back mould mold insert and inserted bar are fixed on the backing plate and do not do the motion, the ejector pin is fixed on the B board, the bullet piece is fixed on the top thimble plate, when the knock-out rod pushes the top thimble plate and moves up with the lower thimble plate, because the ejector pin is pushed by the bullet piece, lead to the ejector pin to promote the B board to move up, make back mould insert and product break away from a distance, when the knock-out rod moves up again, stir the bullet piece by the inserted bar, compression spring moves to one side far away from the ejector pin, make the bullet piece break away from with the ejector, at the moment, the upper ejector plate and the lower ejector plate drive the ejector pins to eject the product out, and the product separation is completed.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (5)

1. Back mould bullet piece mechanism, its characterized in that: the mold comprises a panel, an A plate arranged on the panel and a B plate arranged below the A plate in parallel, wherein a front mold insert is arranged at the bottom of the A plate, a rear mold insert corresponding to the front mold insert is arranged at the top of the B plate, a product is positioned between the front mold insert and the rear mold insert during mold closing, two rear mold inserts are vertically arranged in the rear mold insert, a base plate is horizontally arranged at the bottom of the rear mold insert and fixedly connected with the rear mold insert, the base plate is arranged under the B plate in parallel, the left side and the right side of the base plate are provided with slotted holes in a penetrating manner, ejector rods vertically penetrate through the inner parts of the slotted holes, the top of the ejector rods is fixedly connected with the bottom of the B plate, the left end and the right end of the bottom of the base plate are symmetrically fixed with inserting rods in a hollow structure, strip-shaped grooves are symmetrically formed in the left side wall and the right side wall of the, the bottom of bullet piece block ejector pin, the lateral wall horizontal connection spring of bullet piece, the below level of backing plate sets up thimble board and lower thimble board, just spring horizontal connection is on last thimble board, the second through-hole that corresponds with the first through-hole that corresponds with the ejector pin, corresponds with the inserted bar is all seted up to the left and right sides of going up the thimble board, just also set up the first through-hole and the second through-hole the same with last thimble board horizontal position on the thimble board down, go up the middle part vertical welding thimble of thimble board, just the thimble passes the middle part of backing plate and stretches into in the back mould benevolence.

2. The rear module bullet block mechanism of claim 1 wherein: and when the mold is closed, the vertical height of the rear mold insert is flush with that of the rear mold core.

3. The rear module bullet block mechanism of claim 1 wherein: the ejector rod is of a cylindrical structure, a notch of a rectangular structure is concavely arranged at the bottom of the side wall of the ejector rod, the specification of the notch is matched with that of the elastic block, and the side edge of the elastic block is clamped in the notch at the bottom of the ejector rod at the same side during die assembly.

4. The rear module bullet block mechanism of claim 1 wherein: the bottom of the side wall of the inserted bar, which is close to the spring, is provided with an oblique opening, the top of the oblique opening is obliquely arranged, the side of the oblique opening is vertically arranged, the top of the oblique opening is as high as the strip-shaped groove, a groove in an oblique structure is arranged in the middle of the elastic block close to the spring, and the oblique angle of the oblique edge of the groove is as same as the oblique angle of the top of the oblique opening.

5. The rear module bullet block mechanism of claim 1 wherein: the bottom of the plate A is in a splayed structure and is symmetrically provided with two clamping pins, the plate B is symmetrically provided with two inclined clamping grooves, and the straight lines of the clamping pins are the same as the diameters of the clamping grooves.

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