CN106738696A - A kind of hot runner mould with rotation stripping mechanism - Google Patents

Abstract

The invention provides a hot runner mold with a rotating demoulding mechanism. Combining with product characteristics, a cylinder + slider secondary side core-pulling mechanism is adopted, and a rotating slider head mechanism is designed, which effectively solves the problem of the deep buckle disengagement of the handle. The mold problem avoids the manual removal of the slider head, which can realize automatic production and effectively reduce the mold production cost; for the deep button position inside the product, an integral slider head is used, and a guide slide bar is set between the slider head and the main body core. And it can effectively control the slide-out and reset of the integral inclined plug head, and successfully realize the ejection and automatic production of the product; combined with the structural characteristics of the hot runner injection mold design, creatively adopt the single ejector plate ejection structure design, and complete the product The smooth demoulding provides a useful reference for the mold production of similar products. Automatic production can effectively reduce the production cost of similar products and improve work efficiency.

Description

A hot runner mold with a rotary demoulding mechanism

technical field

The invention relates to a hot runner mold with a rotary demoulding mechanism.

Background technique

In the structural design of injection molds, the design of the side core-pulling and demoulding mechanism is an important difficulty in mold design, especially on the same side of the molded injection molding product, which contains four-sided closure, and the concave features on both sides need to synchronize multiple sides When pulling the core, a special core pulling mechanism and mold must be designed to complete the automatic injection molding production of the product. The use of the hot runner system for the mold has very obvious advantages: first, it shortens the molding cycle of the part. For large thin-walled products, the molding cycle of the hot runner mold can be less than 5 seconds; second, it saves raw materials and reduces The use cost of plastic raw materials; thirdly, to improve the quality of products, there is no need to eliminate subsequent processes such as gate removal, which is conducive to production automation; fourthly, the material has a wide range of adaptability, which can effectively expand the application range of injection molding technology. Many advanced plastic molding technology It is developed on the basis of hot runner technology. In addition, the mechanism is novel in design, easy to use, stable in work, safe and reliable.

Contents of the invention

The technical problem to be solved by the present invention is to provide a hot runner mold with a rotary demoulding mechanism, which is reasonable in design, compact in structure, stable in operation, safe and reliable, and easy to use.

In order to solve the above-mentioned existing technical problems, the present invention adopts the following scheme:

A hot runner mold with a rotary demoulding mechanism, including a hot runner nozzle, a positioning ring, an upper mold seat plate, a cavity, a wedge block, a wear-resistant block, a slider body, a central insert of the slider body, and a rotating slider Head, pull pin, coupling head, primary core-pulling cylinder, primary cylinder mounting plate, secondary cylinder mounting plate, secondary core-pulling cylinder, reset jacking block, core insert, reset jacking cylinder, inclined ejector rod, inclined ejector Seat, ejection push plate, lower mold seat plate, ejection push plate guide block, ejector rod, ejection push plate guide column, movable template, edge ejector block, main core, guide slider, integral inclined head , guide sleeve, guide post.

The rotating slider head is installed on the central insert of the slider body through the rotating mandrel, and the power source for rotating the core-pulling cylinder is provided by a primary core-pulling cylinder, and a connector is installed on the head of the primary core-pulling cylinder. There is a pin hole, and a pulling pin is installed in it, and the two ends of the pulling pin are installed in the sliding grooves provided at the head and tail ends of the rotating slider.

The central slider head is slidingly connected with the left slider and the right slider through a sloped T-shaped groove, so as to provide power for the left slider and the right slider to move inwardly towards the center. The lower part of the left slider is installed on the left slider guide block, and the head is connected with the central slider head through a T-shaped slot; the left slider spring is installed at the tail of the left slider, and is supported by the limit block of the left slider. Provide core-pulling movement power for the left slider, and the limit block of the left slider also plays a role in limiting the core-pulling sliding stroke of the left slider. The lower part of the right slider is installed on the right slider guide block, and the head is connected with the central slider head through a T-shaped slot; the right slider spring is installed at the tail of the right slider, and is supported by the right slider limit block. Provide core-pulling movement power for the right slider, and the right slider limit block also plays a role in limiting the core-pulling sliding stroke of the right slider. The pressing block and the bending pin are installed on the fixed platen of the mold, and the pressing block plays the role of pressing the central slider body when the mold is closed. The mechanism is suitable for the occasion where the concave buckle on the side of the product requires synchronous core pulling on both sides.

When the (M) position core-pulling is demoulded, the core-pulling cylinder is pushed out to the right once, and the rotating slider head is pushed to rotate counterclockwise around its rotating mandrel through the connecting head and the pulling pin, so as to realize the rotation of the slider head from (M) Rotate the core in the slot and pull it out.

When the rotating slider head is reset, it is pulled back to the left by a core-pulling cylinder to realize the reset. In order to ensure the accuracy of the reset, when the rotating slider head is reset, the reset jacking cylinder is used to push the reset jack installed on it. There are two supporting functions for resetting the top block, one is to assist the rotation of the slider head to reset accurately, and the other is to prevent the The head of the rotating slider is extruded by the hot-melt plastic in the cavity, and the reset jacking cylinder always provides upward force during injection molding to ensure the normal position of the head of the rotating slider in the cavity.

Beneficial effects: The present invention adopts a hot runner mold with a rotary demoulding mechanism provided by the above-mentioned technical scheme. For the deep button position inside the product, an integral slider head is adopted, and a guide slide bar is set between the slider head and the main body core. And it can effectively control the slide-out and reset of the integral inclined head, and successfully realize the ejection and automatic production of the product; combined with the product characteristics, the cylinder + slider secondary side core-pulling mechanism is used to design the rotary slider head mechanism. It effectively solves the problem of deep buckle demoulding of the handle, avoids manual removal of the slider head, realizes automated production, and effectively reduces mold production costs; combined with the structural characteristics of the hot runner injection mold design, creatively adopts a single ejector plate top The structural design was completed, and the product was demoulded smoothly, which provided a useful reference for the mold production of similar products.

Description of drawings

Figure 1. Schematic diagram of the top view of the mold structure;

Figure 2 Schematic side view of the mold structure;

Figure 3 Schematic diagram of the slider mechanism of the mold structure;

Fig. 4 Schematic diagram of the inclined top mechanism of the mold structure;

Fig. 5 Schematic diagram of ejection mechanism of mold structure.

detailed description

The mold base specification is a non-standard mold base, as shown in Figure 1-5, the pouring system only uses a single hot runner nozzle pouring method, and the hot runner pouring is controlled by a needle valve. The cavity design of the mold core adopts the integral type, and the core adopts the method of inserting pieces. The mold cooling system is a pipeline water-cooled cooling system with a diameter of 8mm. The places to be cooled include the cavity 4, the central insert 8 of the slider body, the main core 28, and the integral inclined head 30. The side core pulling is completed by the rotating core pulling mechanism, as shown in Figure 2, and the ejection of the product is completed by the integral inclined jack 30 and the edge jacking block 27, as shown in Figure 3.

The structural parts of the mold are shown in Figure 1. The parts are: 1-hot runner nozzle, 2-locating ring, 3-upper mold seat plate, 4-cavity, 5-wrapping block, 6-wearing block , 7-slider body, 8-slider body central insert, 9-rotating slider head, 10-pull pin, 11-coupling head, 12-primary core-pulling cylinder, 13-primary cylinder mounting plate, 14-two Secondary cylinder mounting plate, 15-secondary core-pulling cylinder, 16-reset top block, 17-core insert, 18-reset jacking cylinder, 19-slanted ejector rod, 20-slanted top seat, 21-ejection pusher Plate, 22-lower mold seat plate, 23-ejection push plate guide block, 24-ejector block ejector rod, 25-ejection push plate guide column, 26-moving template, 27-edge ejector block, 28-main core , 29-guide slider, 30-integral inclined head, 31-guide sleeve, 32-guide post.

In actual work, as shown in Figure 3-5, its motion working principle is as follows:

1) Closed mold injection molding. When working, the mold is reset and closed by its own guide post 32. The injection molding machine injects the cavity through the hot runner nozzle 1. After the injection molding is completed, the mold is ready to be opened;

2) Mold opening and unlocking After the mold is opened, the wedging block 5 is installed on the fixed mold by screws. During the mold opening process, the wedging block 5 will be gradually pulled out from the slider body 7 and the central insert 8 of the slider body. Loss of locking control of the rotary slider head 9;

3) Pull the core on the left side of the pulling side and demould. After the mold is opened, the wedge block 5 loses the locking control of the rotating slider head 9, the reset jacking cylinder 18 moves, and the reset jacking block 16 is pulled down to make the rotating slide The block head 9 loses its locking effect, and the space required for rotating the slider head 9 is released, and then, the core-pulling cylinder 12 acts once to rotate and pull the rotating slider head 9 from the closed position of the mold cavity to complete a core-pulling operation; After the first core-pulling is completed, the secondary core-pulling cylinder 15 moves to pull the entire left slider assembly to the left to complete the left side core-pulling demoulding of the product.

4) Product ejection After the core-pulling and demoulding on the left side of the product pulling side is completed, the ejector pin of the injection molding machine will push out the push plate 21, push the integral inclined head 30, and the edge ejector block 27 to push the product from the main core 28 Eject from the top to complete the demoulding of the entire product, as shown in Figure 4.

5) After the mold is closed and the product is ejected, the ejector rod of the injection molding machine will eject the push plate 21, push the integral inclined ejector head 30, and pull back the edge ejector block 27 to reset first, and then, the secondary core-pulling cylinder 15 will slide to the right. The block assembly is pushed back, and when the slider body 7 and the integral inclined head 30 are closed, the core-pulling cylinder 12 is pulled back to the left to reset the rotating slider head 9 to the closed position of the cavity, and then reset the jacking cylinder 18 action, the reset top block 16 is ejected upwards, the rotating slider head 9 is accurately reset and locked through the core insert 17, and then the wedge block 5 is inserted into the slider body 7 and the slider body central insert 8, and the Turn the slider head 9 to securely lock, the mold is closed, and the injection molding cycle starts again.

The present invention overcomes the difficulty of demoulding the deep buckle position of the handle. For the deep buckle position inside the product, an integral slider head is adopted. A guide slide bar is provided between the slider head and the main body core, and the sliding of the integral inclined head can be effectively controlled. Ejection and reset, successfully realizing the ejection and automatic production of the product; combined with the product characteristics, the cylinder + slider secondary side core-pulling mechanism is adopted, and the rotary slider head mechanism is designed, which effectively solves the deep buckle demoulding of the handle problem, avoiding the manual removal of the slider head, enabling automatic production, and effectively reducing the mold production cost; combined with the structural characteristics of the hot runner injection mold design, creatively adopting the single ejector plate ejection structure design, and completing the smooth ejection of the product The mold provides a useful reference for the mold production of similar products, can automate production, effectively reduce the production cost of similar products, and improve 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 (5)

1. A hot runner mold with a rotary demoulding mechanism, including a hot runner nozzle, a positioning ring, an upper mold seat plate, a cavity, a wedge block, a wear-resistant block, a slider body, a central insert for the slider body, a rotating Slider head, pull pin, coupling head, primary core-pulling cylinder, primary cylinder mounting plate, secondary cylinder mounting plate, secondary core-pulling cylinder, reset jacking block, core insert, reset jacking cylinder, inclined ejector rod, Inclined ejector seat, ejector push plate, lower mold seat plate, ejector push plate guide block, ejector rod, ejector push plate guide column, movable template, edge ejector block, main core, guide slider, integral type Inclined head, guide sleeve, guide post. 2. A hot runner mold with a rotary demoulding mechanism according to claim 1, characterized in that: the rotating slider head is installed on the central insert of the slider body through the rotating mandrel, and the rotating core pulling The power source is provided by a primary core-pulling cylinder. A connecting head is installed on the head of the primary core-pulling cylinder. A pin hole is opened on the connecting head, and a pulling pin is installed in it. in the slip groove. 3. A hot runner mold with a rotary demoulding mechanism according to claim 1, characterized in that: the central slider head is slidingly connected to the left slider and the right slider through a sloped T-shaped groove , to provide power for the adduction movement of the left slider and the right slider towards the center; The lower part of the left slider is installed on the left slider guide block, and the head is connected with the central slider head through a T-shaped slot; the left slider spring is installed at the tail of the left slider, and is supported by the limit block of the left slider. Provide core-pulling movement power for the left slider, and the limit block of the left slider also plays the role of limiting the core-pulling sliding stroke of the left slider; the lower part of the right slider is installed on the right slider guide block, and the head passes through The T-shaped slot is connected with the central slider head; the right slider spring is installed at the end of the right slider, and through the jacking of the right slider limit block, it provides the core-pulling movement power for the right slider, and the right slider limit block At the same time, it plays the role of limiting the sliding stroke of the right slider core pulling; The pressing block and the bending pin are installed on the fixed platen of the mold, and the pressing block plays the role of pressing the central slider body when the mold is closed. The mechanism is suitable for the occasion where the concave buckle on the side of the product requires synchronous core pulling on both sides. 4. A hot runner mold with a rotary demoulding mechanism according to claim 1, characterized in that: when the (M)-position core-pulling is demoulding, the core-pulling cylinder is pushed out to the right once, and through the connector, The pull pin pushes the head of the rotating slider to rotate counterclockwise around its rotating mandrel, so that the head of the rotating slider can be rotated and pulled out from the (M) slot. 5. A hot runner mold with a rotary demoulding mechanism according to claim 1, characterized in that: when the rotating slider head is reset, it is pulled back to the left by a core-pulling cylinder to realize the reset, in order to ensure the reset The accuracy of the slider head is rotated when the slider head is reset, and the reset jacking block installed on it is pushed upward by the reset jacking cylinder to jack up the slider head and the core insert. The jacking function of the reset jacking block has two functions. One is to assist the accurate reset of the rotating slider head, and the other is to prevent the rotating slider head from being extruded by the hot-melt plastic in the cavity during injection molding, and the reset jacking cylinder always provides upward force during injection molding. , to ensure the normal position of the rotating slider head in the cavity.