CN106738694A - Mould ejection Injection Mold Design before and after a kind of micromachine case - Google Patents

Abstract

The invention provides a micro-motor housing front and rear mold ejection injection mold, and designs a non-standard one-mold four-cavity banana-shaped gate pouring multi-cavity with three kinds of demoulding core-pulling mechanisms and front and rear ejection mechanisms. Injection mould, three demoulding core-pulling mechanisms are the front mold cylinder push plate push type front mold first core-pulling mechanism, rear mold inclined guide column side core-pulling mechanism, rear mold cylinder driven inclined hole side core-pulling mechanism; front mold cylinder The main function of the ejector mechanism is to drive the core-pulling mechanism of the front mold and the cylinder of the locking rear mold to drive the side core-pulling mechanism of the oblique hole; it effectively reduces the economic cost of production, the design is reasonable and reliable, the structure is compact and reasonable, and the work is stable. Hole-pulling core-pulling is safe and reliable, and can be produced automatically, effectively reducing the production cost of similar products.

Description

Design of an ejection mold for the front and rear molds of the micro-motor housing

technical field

The invention relates to a design of an ejection injection mold for the front and rear molds of a micro motor cover.

Background technique

As shown in Figure 1, it is a micro drive motor shell product, the material is ABS+PA, the product is a cylindrical shell with a special-shaped structure on the side, the average wall thickness is 1.8mm, the structure is relatively complicated, and the middle is a shell with a diameter of Ø104.9mm. The height is 94mm, and the top includes two layers of flanges. The upper flange has an outer diameter of 158mm and a thickness of 2mm. And the outer surface of the mounting table is designed with circular and vertical ribs with a thickness of 1.5mm and a height of 3mm; there are three side derivative structural slots with widths of 31mm, 20.6mm, and 36.4mm distributed around the shell, one of which is The slot at the top is a slope-type extended side hole, the angle between the center line of the chute and the center line of the cylindrical shell is 64º, the slot is a square slot, the depth of the slot is 73.4mm, and the slot width is 15.7mm; there are three side concave trapezoids distributed in the shell The size of the inner hole is 19.2x12.8x5.2mm; from the analysis of the structural characteristics of the product, the main difficulty in mold design during injection molding is the demoulding of the product, including the following aspects: 1) The demoulding of the cavity surface; 2) Demolding of the core surface; 3) Demolding of the flange table rotary buckle table; 4) Demolding of the three derivative structure slots around; 5) Demolding of the three side concave trapezoidal inner holes in the shell mold.

Contents of the invention

The technical problem to be solved by the present invention is to provide an ejection mold design for the front and rear molds of the micro-motor housing, which is reasonable in design, compact in structure, stable in work, safe and reliable, and convenient to use.

In order to solve the above-mentioned existing technical problems, the present invention adopts the following schemes: locking briquetting bar, bent pin, bent pin sleeve, bent pin slider bead, bent pin slider, core insert, cavity central insert, Slanted guide column, wedge block, slider body, wear-resistant block, slider bead, locking plunger, plunger guide sleeve, side slider bead, travel switch, cylinder mounting plate, cylinder, slider base, center Slider body, square hole slider head, positioning ring, panel, upper support column, core pulling plate, locking ring, front mold cylinder seat, front mold cylinder, cavity fixing plate, core fixing plate, reset rod, Limiting block, thimble panel, lower support column, thimble push plate, lower bottom plate, garbage nail, pull rod cover, protective column, upper mold foot, water transport integrated block, guide sleeve, guide column, fine positioning block, counter, lower mold Feet, through-hole inserts, cavity inserts, gate inserts, pulling rods, thimbles, gate bushings, and clamping pieces.

According to preference, the mold in the molded part adopts one mold with four cavities, and in the design of a single cavity molded part, the insert is inserted into the template for installation; the component parts include the core insert, the molding part of each demoulding mechanism component, the mold Cavity central inserts, through hole inserts, cavity inserts.

According to preference, the pouring of the single-cavity design of the pouring system adopts a banana-shaped gate for pouring, and the size of the end of the banana-shaped gate is Ø1mm. The sprue inserts are assembled; the advantage of using the banana gate is that it can automatically complete the separation of the product and the waste when ejecting, so as to facilitate the automatic injection molding production; the gate bushing is directly installed on the mold cavity fixing plate to maximize the Shorten the length of the cold runner, and use a Ø4mm circular runner for the cold runner.

According to preference, the cooling system is designed to cool the core inserts, cavity central inserts, and cavity inserts, and the core inserts and cavity inserts are directly processed by drilling Ø10mm holes on the inserts , and the central insert of the cavity is considered to be too small in size and round in shape, and is cooled by a cooling water well with a diameter of Ø14mm, and a beryllium copper water baffle is set in the center.

According to preference, the structural composition of the demoulding system demoulding system is divided into the following parts: ① Front mold demoulding system: mainly designed for the three mechanisms of front mold core pulling, front mold core pulling, and front mold core pulling. Taking core pulling as an example, the main parts include locking briquetting bar, bent pin, bent pin sleeve, bent pin slider bead, bent pin slider, upper support column, core pulling plate, locking ring, front mold cylinder seat, Front mold cylinder and upper mold foot; the upper mold foot separates the panel from the cavity fixing plate to form a movement space for the core pulling plate, and the upper support column provides strength support for the cavity fixing plate, and the front mold cylinder seat is installed on On the cavity fixing plate, the front mold cylinder is installed on the front mold cylinder seat, and its central cylinder rod is tightly connected with the core pulling plate through the locking ring, so that the front mold cylinder can push the core pulling plate to move up and down. The locking briquetting bar and the bending pin are installed on the core-pulling pull plate through screws. When the core-pulling pull plate is pushed to move, the locking briquetting bar and the bending pin can also move synchronously; therefore, the core-pulling action of the front mold core-pulling The principle is: when the front mold cylinder pushes the core-pulling plate to move upward, the bent pin will pull the bent pin slider to complete the core-pulling action, and when it moves downward, the bent pin will push the bent pin slider to complete the reset action, and finally the locking pressure The block bar presses the curved pin slider back to its original position and locks it; Rear mold demoulding system: The rear mold demoulding system includes four mechanisms for the core pulling of the rear mold, the core pulling and demoulding mechanism, and the final ejection mechanism of the product; the rear mold The motion drive of the four core-pulling mechanisms relies on the power when the mold cavity is opened to complete the core-pulling and demoulding action: the action of the core-pulling and demoulding mechanism needs to be completed in two steps, locking and core-pulling. When the core-pulling and demoulding mechanism actually works, its components include locking plunger, plunger guide sleeve, side slider bead, travel switch, cylinder mounting plate, cylinder, slider base, center slider body, and square hole slider Head, upper supporting column, core pulling plate, locking ring, front mold cylinder seat, front mold cylinder, upper mold foot; the locking plunger is installed on the core pulling plate through screws, and the movement of the locking plunger and the lock The pressing block strip and the bent pin are synchronized. The working principle of the core-pulling and demoulding mechanism is: when the locking plunger is driven upward by the core-pulling plate, the locking plunger loses control of the center slider body, so the cylinder can pull the center slider body for core-pulling movement ;When the cylinder pushes the center slider back to its original position, the locking insert rod moves downwards under the drive of the core-pulling plate and inserts into the center slider body to lock it. The slider head is pushed out by the injection molding pressure; the final ejection mechanism components of the product include reset rod, limit block, thimble panel, lower support column, thimble push plate, garbage nail, pull rod sleeve, lower mold foot, pull rod, thimble , The limit block limits the ejection stroke of the thimble push plate to 90mm.

According to preference, the mold base of the mold base structure is selected from LKM-CI8090-A130-B200-C200 mold base, and it is modified, and an upper support column, a core pulling plate, an upper Mold feet and other parts to realize the first core-pulling function of the front mold core-pulling mechanism. On the basis of the mold foot selection, in order to realize the automation function of the mold work and other work requirements, the mold is designed with auxiliary parts such as counters, precise positioning blocks, mold locking pieces, protective columns, and integrated water delivery blocks.

Beneficial effect:

The present invention adopts the above-mentioned technical scheme to provide a design of the ejection injection mold for the front and rear molds of the micro-motor housing, and designs a non-standard one-mold four-cavity banana-shaped casting with three kinds of demoulding core-pulling mechanisms and front and rear ejection mechanisms. Mouth-casting multi-cavity injection mold, three demoulding core-pulling mechanisms are the front-mold cylinder push plate pushing type front-mold first-core-pulling mechanism, rear-mold inclined guide column side core-pulling mechanism, and rear-mold cylinder-driven inclined-hole side core-pulling mechanism The main function of the front mold cylinder ejection mechanism is to drive the front mold core-pulling mechanism and lock the rear mold cylinder to drive the inclined hole side core-pulling mechanism. Effectively reduces the economic cost of production, the design is reasonable and reliable, the structure is compact and reasonable, the work is stable, the side-drawing hole inside the product is safe and reliable, it can be produced automatically, and the production cost of similar products is effectively reduced.

Description of drawings

Figure 1 Schematic diagram of product structure;

Fig. 2 schematic diagram of the front view of the mold structure;

Fig. 3 schematic diagram of mold structure side view 1;

Fig. 4 schematic diagram of mold structure side view 2;

Figure 5 is a schematic view of the dynamic mold structure of the mold;

Figure 6 is a schematic view of the fixed mold view of the mold structure;

Figure 7 is a schematic diagram of the top view of the mold structure.

detailed description

As shown in Figure 2-7, a micro-motor housing front and rear mold ejection injection mold design includes: 1-locking press block, 2-curved pin, 3-curved pin sleeve, 4-curved pin slider bead, 5-curved pin slider, 6-core insert, 7-cavity central insert, 8-oblique guide post, 9-wedge block, 10-slider body, 11-wear-resistant block, 12-slider Bead, 13-Locking insert rod, 14-Insert rod guide sleeve, 15-Side slider bead, 16-Travel switch, 17-Cylinder mounting plate, 18-Cylinder, 19-Slider base, 20-Center slider Body, 21-square hole slider head, 22-locating ring, 23-panel, 24-upper support column, 25-core pulling plate, 26-locking ring, 27-front mold cylinder seat, 28-front mold cylinder , 29-cavity fixed plate, 30-core fixed plate, 31-reset rod, 32-limit block, 33-thimble panel, 34-lower support column, 35-thimble push plate, 36-lower bottom plate, 37- Garbage nail, 38-tie rod sleeve, 39-protection column, 40-upper mold foot, 41-water transport integrated block, 42-guide sleeve, 43-guide column, 44-fine positioning block, 45-counter, 46-lower mold Foot, 47-insert hole insert, 48-cavity insert, 49-gate insert, 50-pull rod, 51-thimble, 52-gate bushing, 53-locking plate.

The mold adopts one mold with four cavities, and in the design of a molded part with a single cavity, the insert is inserted into the template for installation. The component parts include core inserts 6, molding parts of each demoulding mechanism, cavity central inserts 7, insertion hole inserts 47, and cavity inserts 48.

The single-cavity casting adopts the banana-shaped gate for pouring. The end size of the banana-shaped gate is Ø1mm. The processing of the gate adopts the method of splicing inserts, that is, the composition of a single gate is composed of two sprue inserts 49 spliced together. The advantage of using the banana gate is that it can automatically complete the separation of the product and the waste when ejecting, so as to facilitate the automatic injection molding production; the gate bushing 52 is directly installed on the mold cavity fixing plate 29 to shorten the length of the cold runner as much as possible , The cold runner uses a Ø4mm circular runner.

Cooling system design: The cooling is mainly for the core insert 6, the cavity central insert 7, and the cavity insert 48. The core insert 6 and the cavity insert 48 are processed by directly drilling Ø10mm holes on the inserts. However, the central insert 7 of the cavity is considered to be too small in size and round in shape, so it is cooled by a cooling water well with a diameter of Ø14mm, and a beryllium copper water baffle is set in the center.

The structural composition of the demoulding system is divided into the following parts:

① Front mold demoulding system: mainly designed for the three mechanisms of front mold core pulling A, front mold core pulling B, and front mold core pulling C. Taking front mold core pulling A as an example, the main parts include locking briquetting strip 1, Bent pin 2, bent pin sleeve 3, bent pin slider bead 4, bent pin slider 5, upper support column 24, core pulling plate 25, locking ring 26, front mold cylinder seat 27, front mold cylinder 28, upper Mold foot 40; the upper mold foot 40 separates the panel 23 from the cavity fixing plate 29 to form a movement space for the core pulling plate 25, and the upper support column 24 provides strength support for the cavity fixing plate 29, and the front mold cylinder seat 27 is installed on the cavity fixing plate 29, and the front mold cylinder 28 is installed on the front mold cylinder seat 27, and its central cylinder rod is tightly connected with the core pulling plate 25 through the locking ring 26, so that the front mold cylinder 28 can push The core pulling plate 25 moves up and down. The locking briquetting bar 1 and the bending pin 2 are installed on the core-pulling pull plate 25 through screws, and when the core-pulling pull plate 25 is pushed to move, the locking briquetting bar 1 and the bending pin 2 can also move synchronously; therefore, the front mold The core-pulling action principle of core-pulling A is: when the front mold cylinder 28 pushes the core-pulling pull plate 25 to move upward, the curved pin 2 will pull the curved pin slider 5 to complete the core-pulling action, and when it moves downward, the curved pin 2 will push the curved pin The pin slider 5 completes the reset action, and finally the locking briquetting bar 1 presses the bent pin slider 5 back to its original position and locks it.

②Rear mold demoulding system: The rear mold demoulding system includes four mechanisms of rear mold core pulling 1~4, core pulling and demoulding mechanism 5, and the final ejection mechanism of the product.

The movement drive of the four mechanisms of core pulling 1~4 of the rear mold depends on the power when the mold cavity is opened to complete the core pulling and demoulding action; the action of the core pulling and demoulding mechanism 5 needs to be completed in two steps, locking and core pulling; When the core-pulling and demoulding mechanism 5 is actually working, its component parts include locking inserting rod 13, inserting rod guide sleeve 14, side slide block bead 15, travel switch 16, cylinder mounting plate 17, cylinder 18, slide block base 19, center Slider body 20, square hole slider head 21, upper support column 24, core pulling plate 25, locking ring 26, front mold cylinder seat 27, front mold cylinder 28, upper mold foot 40; locking insert rod 13 passes The screw is installed on the core pulling plate 25, and the movement of the locking insertion rod 13 is synchronized with the locking briquetting bar 1 and the bent pin 2; the working principle of the core pulling and demoulding mechanism 5 is: the locking insertion rod 13 is pulled When the plate 25 is driven to move upward, the locking plunger 13 loses control of the center slider body 20, so the cylinder 18 can pull the center slider body 20 to perform core-pulling movement; when the cylinder 18 pushes the center slider body 20 to reset, The locking plunger 13 moves downwards under the drive of the core-pulling pull plate 25 and inserts into the center slider body 20 to lock it, so as to prevent the square hole slider head 21 from being damaged by the injection molding pressure due to insufficient locking force of the cylinder 18 during injection molding. roll out.

The components of the final ejection mechanism of the product include reset rod 31, limit block 32, thimble panel 33, lower support column 34, thimble push plate 35, garbage nail 37, pull rod sleeve 38, lower die foot 46, pull rod 50, The thimble 51; the limit block 32 limits the ejection stroke of the thimble push plate to 90mm.

The mold base is LKM-CI8090-A130-B200-C200 mold base, and it is modified, and the upper supporting column 24, the core pulling plate 25, the upper mold foot 40, etc. are added between the panel 23 and the cavity fixing plate 29 Parts to realize the first core-pulling function of the core-pulling mechanism of the front mold; on the basis of the mold foot selection, in order to realize the automation function of the mold work and other work requirements, the mold is designed with a counter 45, a precise positioning block 44, a locking piece, a protection Auxiliary parts such as column 39, integrated water transport block 41.

In actual work, as shown in Figure 2, the parting opening of the mold is divided into two openings, respectively at PL1 and PL2. The working principle of the movement is as follows:

1) The front mold first core-pulling mold injection molding is completed. After the mold is opened, the parting surface PL1 is opened first, that is, the front mold cylinder 28 moves to push the core-pulling pull plate 25 to eject upwards, driving the front mold core A and front mold core-pulling B. The bending pin 2 action of the three mechanisms of the front mold core pulling C completes the demoulding of the buckle position of the undercut A, undercut B, and undercut C of the product; at the same time, the locking insertion rod 13 loses its alignment with the center slider body 20, the center slider body 20 is in a state that can be pulled by the cylinder 18 and can move outwards.

2) Rear mold core pulling After the front mold core pulling is completed, the mold is opened at the main parting surface of PL2. Driven by the mold core fixing plate 30, the inclined guide pillars of the four mechanisms of rear mold core pulling 1~4 move their The corresponding slider body completes the core-pulling and demoulding of the product's 8 edge undercuts and straight side concave features.

3) After the core-pulling of the inclined hole of the rear mold is completed, the upper cylinder 18 of the core-pulling and demoulding mechanism 5 moves to drive the center slider body 20 and the square hole slider head 21 to complete the side core-pulling of the square hole of the side derivative structure slot demoulding.

4) The product is completely ejected from the mold. The pulling rod 50 and ejector pin 51 are pushed by the ejector pin of the injection molding machine through the ejector pin push plate 35 to completely eject the product from the core insert 6 .

5) When resetting, the thimble push plate 35 is reset first, and then the cylinder 18 acts to push the center slider body 20 and the square hole slider head 21 to reset first, and then the mold is closed at the PL2 parting surface to complete the closure of the mold cavity , at last, the front mold cylinder 28 moves, pulls the core-pulling pull plate 25 and descends first, and the curved pin slide block 5 of the front mold core-pulling A, front mold core-pulling B, and front-mould core-pulling C three mechanisms are pressed back to reset, and the mold Closed, waiting for the start of the next injection cycle.

The invention provides a kind of injection mold for the front and rear molds of the micro-motor housing, which reduces the process difficulty of product production, effectively reduces the economic cost of production, and has reasonable and reliable design, compact and reasonable structure, stable work, and the hidden side of the product. Hole-pulling core-pulling is safe and reliable, and can be produced automatically, effectively reducing the production cost of similar products and improving work efficiency.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention, and those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or replace them in similar ways, but It does not depart from the spirit of the invention or go beyond the scope defined by the appended claims.

Claims (6)

1. A micro-motor housing front and rear mold ejection mold design, including locking press block strips, bent pins, bent pin sleeves, bent pin sliders, bent pin sliders, core inserts, and cavity center inserts Block, inclined guide post, wedge block, slider body, wear-resistant block, slider bead, locking plunger, plunger guide sleeve, side slider bead, travel switch, cylinder mounting plate, cylinder, slider base , center slider body, square hole slider head, positioning ring, panel, upper support column, core pulling plate, locking ring, front mold cylinder seat, front mold cylinder, cavity fixing plate, core fixing plate, reset Rod, limit block, thimble panel, lower support column, thimble push plate, lower bottom plate, garbage nail, pull rod sleeve, protective column, upper mold foot, water transport integrated block, guide sleeve, guide post, fine positioning block, counter, Lower mold feet, inserting hole inserts, cavity inserts, gate inserts, pulling rods, thimbles, gate bushings, and mold locking pieces. 2. According to the design of the ejection mold of the front and rear molds of the micro-motor housing according to claim, the mold adopts a mold with four cavities, and the molded part of a single cavity is designed to be installed in a formwork with an insert; the component parts include Core inserts, molding parts of each demoulding mechanism, cavity central inserts, insertion hole inserts, and cavity inserts. 3. According to the design of the ejection mold for the front and rear molds of the micro-motor housing according to claim, the casting of the single cavity of the pouring system design adopts a banana-shaped gate for pouring, and the size of the end of the banana-shaped gate is Ø1mm, and the gate The processing adopts the method of inserting blocks, and the composition of a single gate is composed of two gate inserts; the advantage of using banana-shaped gates is that the separation of products and waste can be automatically completed when ejecting, so as to facilitate automatic injection molding production. ;The gate bushing is directly installed on the fixed plate of the mold cavity to shorten the length of the cold runner as much as possible. The cold runner adopts a Ø4mm circular runner. 4. According to the design of the ejection mold for the front and rear molds of the miniature motor housing according to claim, the cooling system design: the cooling is mainly aimed at cooling the core insert, the central insert of the cavity, and the insert of the cavity. Core inserts and cavity inserts are processed by directly drilling Ø10mm holes on the inserts, while the central insert of the cavity is considered to be too small in size and round in shape, so it is cooled by a cooling water well with a diameter of Ø14mm , the center set beryllium copper water baffle. 5. According to the ejection mold design of the front and rear molds of the micro-motor housing according to claim, the structural composition of the demoulding system of the demoulding system is divided into the following parts: 1. The front mold demoulding system: mainly for the front mould. core, front mold core pulling, and front mold core pulling three mechanisms. Taking front mold core pulling as an example, the main parts include locking briquetting strips, bent pins, bent pin sleeves, bent pin sliders, and bent pin sliders. , upper support column, core pulling plate, locking ring, front mold cylinder seat, front mold cylinder, upper mold foot; the upper mold foot separates the panel from the cavity fixing plate to form a movement space for the core pulling plate, and The upper support column provides strength support for the cavity fixing plate, the front mold cylinder seat is installed on the cavity fixing plate, the front mold cylinder is installed on the front mold cylinder seat, and the central cylinder rod is tightened by the locking ring and the core pulling plate. Solid connection, so that the front mold cylinder can push the core pulling plate to move up and down; The locking briquetting bar and the bending pin are installed on the core-pulling pull plate through screws. When the core-pulling pull plate is pushed to move, the locking briquetting bar and the bending pin can also move synchronously; therefore, the core-pulling action of the front mold core-pulling The principle is: when the front mold cylinder pushes the core-pulling plate to move upward, the bent pin will pull the bent pin slider to complete the core-pulling action, and when it moves downward, the bent pin will push the bent pin slider to complete the reset action, and finally the locking pressure The block bar presses the curved pin slider back to its original position and locks it; Rear mold demoulding system: The rear mold demoulding system includes four mechanisms for the core pulling of the rear mold, the core pulling and demoulding mechanism, and the final ejection mechanism of the product; the rear mold The movement drive of the four core-pulling mechanisms relies on the power when the mold cavity is opened to complete the core-pulling and demoulding action: the action of the core-pulling and demoulding mechanism needs to be completed in two steps, locking and core-pulling; When the core-pulling and demoulding mechanism actually works, its components include locking plunger, plunger guide sleeve, side slider bead, travel switch, cylinder mounting plate, cylinder, slider base, center slider body, and square hole slider Head, upper supporting column, core pulling plate, locking ring, front mold cylinder seat, front mold cylinder, upper mold foot; the locking plunger is installed on the core pulling plate through screws, and the movement of the locking plunger and the lock The pressing block strip and the bending pin are synchronized; The working principle of the core-pulling and demoulding mechanism is: when the locking plunger is driven upward by the core-pulling plate, the locking plunger loses control of the center slider body, so the cylinder can pull the center slider body for core-pulling movement ;When the cylinder pushes the center slider back to its original position, the locking insert rod moves downwards under the drive of the core-pulling plate and inserts into the center slider body to lock it. The slider head is pushed out by the injection molding pressure; the final ejection mechanism components of the product include reset rod, limit block, thimble panel, lower support column, thimble push plate, garbage nail, pull rod sleeve, lower mold foot, pull rod, thimble , The limit block limits the ejection stroke of the thimble push plate to 90mm. 6. According to the design of the ejection mold of the front and rear molds of the micro-motor housing according to claim, the mold base of the mold base structure is selected from the LKM-CI8090-A130-B200-C200 mold base, and it is modified, and the panel The upper support column, core pulling plate, upper mold foot and other parts are added between the cavity fixing plate to realize the first core pulling function of the front mold core pulling mechanism; On the basis of the mold foot selection, in order to realize the automation function of the mold work and other work requirements, the mold is designed with auxiliary parts such as counters, precise positioning blocks, mold locking pieces, protective columns, and integrated water delivery blocks.