CN115214092A - A new type of in-die cutting nozzle structure - Google Patents

Abstract

The invention relates to a novel in-mold runner structure in the field of mold technology, comprising a movable mold assembly, a fixed mold assembly and a cutter assembly. The cutter assembly includes a product ejector pin, a flow channel ejector pin and a glue port ejector pin. The rubber mouth material is tensioned, so that the position of the rubber mouth material is limited, the product and the rubber mouth material are punched by the oblique cutting blade, so that the product and the rubber mouth material are separated, and the product is ejected by the product ejector; the invention The process of demoulding and separating by one ejection can achieve the effect of secondary ejection and realize the function of cutting rubber material in the mold, thereby improving production efficiency and reducing production cost and manufacturing cost. When the product ejector pin , When the runner thimble or the rubber port thimble is damaged, it can be replaced separately, which has the effect of reducing maintenance costs. The second process of removing the glue mouth is omitted in the production.

Description

A new type of in-die cutting nozzle structure

technical field

The invention relates to the technical field of molds, in particular to a novel in-mold shroud structure.

Background technique

Injection mold is a tool for producing plastic products; it is also a tool for giving plastic products complete structure and precise dimensions. Injection molding is a processing method used in the mass production of some complex-shaped parts. Specifically, it refers to the injection of the heated and melted plastic into the cavity of the injection molding machine at high pressure, and after cooling and solidification, a molded product is obtained.

The products made by the injection mold will have a glue inlet. Usually, the product is taken out of the injection molding machine and then cut off with a knife. When cutting into the glue mouth, it is easy to scratch the product and cut the glue inlet. Unevenness seriously affects the appearance of the product, causing the product to be scrapped and wasting a lot of manpower and material resources.

For plastic injection products, after injection molding, the product and the plastic material are connected together, and the product needs to remove the plastic material before it can be used normally. At present, the production requires secondary processing to remove the glue material after injection molding, as shown in Figure 1, in the prior art, a traditional ejector mechanism is used for demoulding, and a glue removal process is added, as shown in Figure 2, thereby increasing the process And reduce the work efficiency, for this reason, the present inventor proposes a new type of in-mold shroud structure to solve the above-mentioned technical problems.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned shortcomings, the invention aims to provide a technical solution that can solve the above-mentioned problems.

A novel in-die nozzle structure includes a movable die assembly, a fixed die assembly and a cutter assembly. The movable die assembly includes a movable die base, a thimble plate, a thimble fixing plate and a cavity fixing plate, and the fixed die assembly It includes a fixed die seat and a core fixing plate. The tool assembly includes a product ejector pin, a runner ejector pin and a rubber port ejector pin. The inside of the ejector pin fixing plate is provided with an escape groove for accommodating the product ejector pin and the runner ejector pin. The escape groove extends to the ejector pin. Inside the plate, the thimble plate is located between the thimble fixing plate and the movable mold base. One end of the product thimble and the runner thimble penetrates the thimble fixing plate and the thimble plate in turn. The cavity fixing plate and the core fixing plate are respectively provided with a cavity. and core;

One end of the product thimble, the runner thimble and the rubber port thimble all extend to the inside of the cavity, and the cavity is used for molding products. The inside of the core is provided with a discharge well, which is concave and arc-shaped. , One end of the thimble of the runner is a barb, one end of the thimble of the rubber mouth is a beveled blade, and the beveled blade is at a bevel of 45 degrees. A return rod for reset is installed inside the thimble fixing plate, and the cavity is used for molding products. When the product is formed, one end of the product is provided with a rubber mouth material, and the rubber mouth material is tensioned by the barb at one end of the runner thimble, so as to limit the position of the rubber mouth material. When the direction of the mouth material moves, the product and the rubber mouth material are punched by the beveled blade, so that the product and the rubber mouth material are separated, and the product is ejected to the outside of the cavity through the product ejector.

Further, one end of the ejector pin of the product and the ejector pin of the runner is attached to the surface of the movable mold base, one end of the ejector pin of the glue port is located inside the ejector pin fixing plate, and the ejector pin of the glue port is located between the ejector pin of the product and the ejector pin of the flow channel, When the thimble plate pushes the thimble fixing plate, the thimble fixing plate and the thimble plate drive the product thimble, the runner thimble and the thimble of the glue hole to move towards the direction of the cavity, thereby generating a punching force to separate the product and the glue mouth material.

Further, one end of the return rod penetrates through the surface of the cavity fixing plate and extends beyond the surface of the cavity fixing plate, the highest point of the return rod is lower than the surface of the core fixing plate, and the highest point of the return rod is fixed with the core. The distance between the plates is 0.5mm, and a setting of 0.5mm is left between the return rod and the core fixing plate to avoid that when the thimble fixing plate and the thimble plate drive the return rod to move in the direction of the cavity, one end of the return rod is connected to the core fixing plate. Surfaces collide.

Further, the lowest point of the avoidance groove is spaced 1mm from one end of the product ejector pin and the runner ejector pin. When the ejector pin plate moves, the instantaneous force generated by the ejector pin plate is avoided by the avoidance groove inside the ejector pin fixing plate. The force generated by the ejector plate causes damage to one end of the product ejector and the runner ejector.

Further, a spacer block is arranged between the cavity fixing plate and the movable mold base, and the two ends of the spacer block are respectively attached to the surfaces of the cavity fixing plate and the movable mold base. The contact point of the die base can increase the supporting force and reduce the possibility of deformation of the movable die base and the cavity fixing plate under the impact of pressure.

Further, a guide post is installed inside the cavity fixing plate, a guide sleeve that is paired with the guide post is provided inside the core fixing plate, one end of the guide sleeve is attached to the surface of the cushion block, and the guide post and the guide sleeve are installed. For clearance fit, the movable mold assembly and the fixed mold assembly are positioned by connecting the guide sleeve through the guide post, so as to avoid the movable mold assembly and the fixed mold assembly due to inaccurate positioning during mold clamping. The die assembly is scrapped.

Further, the movable mold seat, the ejector pin plate, the ejector pin fixing plate and the cavity fixing plate, and the fixed mold seat and the core fixing plate are all abutted by screws, and the movable mold assembly and the fixed mold assembly are separated structures.

Compared with the prior art, the beneficial effect of the present invention is that the rubber mouth material is tightened by the barb at one end of the thimble of the flow channel, so that the position of the rubber mouth material is limited. When the direction of the mouth material moves, the product and the rubber mouth material are punched by the beveled blade, so that the product and the rubber mouth material are separated, and the product is ejected to the outside of the cavity through the product ejector;

The present invention adopts the process of demoulding and separating by one-time ejection, realizes the effect of secondary ejection, and simultaneously realizes the function of in-mold cutting plastic material, increases the output and reduces the number of mold openings, thereby achieving the effect of improving production efficiency , reduce the production cost and manufacturing cost, when the product thimble, the runner thimble or the rubber mouth thimble is damaged, it can be replaced separately, which has the effect of reducing the maintenance cost and reducing the cost expenditure. After the injection molding is completed, the plastic mouth solidifies Before, the plastic mouth thimble first cuts the plastic mouth, and then opens the mold, which saves the second process of removing the plastic mouth in production.

Description of drawings

Fig. 1 is the mold opening schematic diagram of existing in-mold cutting nozzle in the background technology;

Fig. 2 is the schematic diagram of the existing ejector mechanism in the background technology;

Figure 3 is a full cross-sectional view of a new type of in-mold nozzle structure;

Fig. 4 is a partial enlarged schematic diagram of A in Fig. 3;

Fig. 5 is a partial enlarged schematic diagram of B in Fig. 3;

Fig. 6 is a partial enlarged schematic diagram of C in Fig. 3;

Figure 7 is a schematic view of the mold opening of a novel in-mold runner structure;

Figure 8 is a reference diagram of the use state of a new type of in-mold shroud structure;

Figure 9 is a front view of a cutter assembly in a novel in-die shroud structure;

In Fig. 1-Fig. 2: A-movable mold, B-fixed mold, C-product ejector, D-runner ejector, E-return rod, F-product;

In Fig. 3-Fig. 9: 1-movable die base, 2-thimble plate, 3-thimble fixing plate, 4-cavity fixing plate, 5-fixed die base, 6-core fixing plate, 7-product thimble, 8 - runner thimble, 9-plastic thimble, 10-relief groove, 11-cavity, 12-core, 13-product, 14-discharge well, 15-barb, 16-bevel cutting edge, 17- Return rod, 18-pad, 19-guide post, 20-guide sleeve, 21-plastic material.

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

In this embodiment, please refer to FIG. 3 to FIG. 9 , a new type of in-die nozzle structure implemented in this embodiment includes a movable die assembly, a fixed die assembly and a cutter assembly, and the movable die assembly includes a movable die base 1 , thimble plate 2, thimble fixing plate 3 and cavity fixing plate 4, the fixed die assembly includes the fixed die seat 5 and the core fixing plate 6, the tool assembly includes the product thimble 7, the runner thimble 8 and the glue port thimble 9, the thimble The interior of the fixing plate 3 is provided with an escape groove 10 for accommodating the product ejector pin 7 and the flow channel ejector pin 8 . The escape groove 10 extends to the interior of the ejector pin plate 2 , and the ejector pin plate 2 is located between the ejector pin fixing plate 3 and the movable mold base 1 . , one end of the product ejector pin 7 and the flow channel ejector pin 8 pass through the ejector pin fixing plate 3 and the ejector pin plate 2 in turn, and the cavity fixing plate 4 and the core fixing plate 6 are respectively provided with a cavity 11 and a core 12;

One end of the product ejector pin 7, the flow channel ejector pin 8 and the rubber port ejector pin 9 all extend to the inside of the cavity 11, the cavity 11 is used for molding the product 13, and the inside of the core 12 is provided with a discharge well 14. The discharge well 14 is Inwardly concave and arc-shaped, one end of the runner thimble 8 is a barb 15, one end of the rubber thimble 9 is a beveled blade 16, and the beveled blade 16 is at a 45-degree bevel, and the internal installation of the thimble fixing plate 3 There is a return rod 17 for resetting, and the cavity 11 is used for molding the product 13. When the product 13 is formed, one end of the product 13 is provided with a rubber mouth material 21, and the rubber mouth material 21 is formed by the barb 15 at one end of the runner thimble 8. Tension is performed to limit the position of the rubber material 21. When the beveled blade 16 at one end of the rubber thimble 9 moves in the direction of the rubber material 21, the product 13 and the rubber material 21 are cut by the beveled blade 16. Die cutting, so that the product 13 is separated from the rubber material 21 , and the product 13 is ejected to the outside of the cavity 11 through the product ejector pin 7 .

The product ejector pin 7 and the flow channel ejector pin 8 pass through one end of the ejector pin plate 2 and are attached to the surface of the movable mold base 1. One end of the glue port ejector pin 9 is located inside the ejector pin fixing plate 3, and the glue port ejector pin 9 is located between the product ejector pin 7 and the flow path. Between the thimbles 8, when the thimble plate 2 pushes the thimble fixing plate 3, the thimble fixing plate 3 and the thimble plate 2 drive the product thimble 7, the runner thimble 8 and the glue port thimble 9 to move in the direction of the cavity 11, thereby The punching force is generated to separate the product 13 from the sizing material 21 .

One end of the return rod 17 penetrates the surface of the cavity fixing plate 4 and extends beyond the surface of the cavity fixing plate 4. The highest point of the return rod 17 is lower than the surface of the core fixing plate 6, and the highest point of the return rod 17 is the same as the The distance between the core fixing plates 6 is 0.5mm, and the setting of 0.5mm is left between the return rod 17 and the core fixing plate 6 to prevent the ejector pin fixing plate 3 and the ejector pin plate 2 from driving the return rod 17 to move in the direction of the cavity 11. One end of the return rod 17 collides with the surface of the core fixing plate 6 .

The lowest point of the avoidance groove 10 is spaced 1mm from one end of the product ejector pin 7 and the flow channel ejector pin 8. When the ejector pin plate 2 moves, the avoidance groove 10 inside the ejector pin fixing plate 3 avoids the moment generated by the ejector pin plate 2. The force generated by the thimble plate 2 can prevent damage to one end of the product thimble 7 and the runner thimble 8; a spacer 18 is provided between the cavity fixing plate 4 and the movable mold base 1, and the two ends of the spacer 18 are respectively connected to The surface of the cavity fixing plate 4 and the movable die base 1 are attached, and the contact point between the cavity fixing plate 4 and the movable die base 1 is increased through the spacer block 18, thereby increasing the supporting force and reducing the movable die base 1. The possibility of deformation of the cavity fixing plate 4 under the impact of pressure.

A guide post 19 is installed inside the cavity fixing plate 4, and a guide sleeve 20 matched with the guide post 19 is provided inside the core fixing plate 6. The column 19 and the guide sleeve 20 are in clearance fit, and the guide column 19 is connected to the guide sleeve 20 to position the movable die assembly and the fixed die assembly to avoid inaccurate positioning of the movable die assembly and the fixed die assembly during mold clamping. As a result, the movable mold assembly and the fixed mold assembly are scrapped; the movable mold base 1, the thimble plate 2, the thimble fixing plate 3 and the cavity fixing plate 4 and the fixed die base 5 and the core fixing plate 6 are all abutted by screws. The movable mold assembly and the fixed mold assembly are separated structures.

The main point of the design of the present invention is that the rubber nozzle material 21 is tightened by the barb 15 at one end of the runner thimble 8, so that the position of the rubber nozzle material 21 is limited. When the direction of the material 21 is moved, the product 13 and the rubber material 21 are punched by the oblique cutting blade 16, so that the product 13 and the rubber material 21 are separated, and the product 13 is ejected to the cavity 11 by the product ejector pin 7. the exterior.

The action process of the present invention is as follows: when the movable mold assembly and the fixed mold assembly are closed, the molded product 13 is formed through the cooperation of the cavity 11 and the core 12, and the cavity fixing plate 4 is driven by the movable mold base 1 to fix the cavity. The plate 4 is separated from the surface of the core fixing plate 6. When the thimble plate 2 pushes the thimble fixing plate 3, the thimble fixing plate 3 and the thimble plate 2 drive the product thimble 7, the runner thimble 8 and the glue port thimble 9 toward the cavity 11. The direction is moved, thereby generating a punching force to separate the product 13 from the rubber material 21 .

Through the barb 15 at one end of the runner thimble 8, the rubber nozzle material 21 is tightened, so that the position of the rubber nozzle material 21 is limited. , the product 13 and the rubber material 21 are punched by the beveled blade 16 , so that the product 13 and the rubber material 21 are separated, and the product 13 is ejected to the outside of the cavity 11 through the product ejector pin 7 .

The movable mold assembly and the fixed mold assembly are positioned by connecting the guide sleeve 20 through the guide post 19, so as to avoid the movable mold assembly and the fixed mold assembly due to inaccurate positioning during mold clamping. item scrapped.

After the injection molding is completed and before the glue port is solidified, the ejector plate 2 is ejected by 0.5mm, and the ejector pin 9 is ejected to separate the product 13 from the glue port material. The runner thimble 8 does not move due to the avoidance of the thimble plate 2. After the mold is opened, the thimble plate 2 continues to be pushed forward, and the product thimble 7, the runner thimble 8 and the glue port thimble 9 are simultaneously ejected, so that the product 13 and For the separation of the rubber material, the process of demoulding and separation can be carried out by one ejection, so as to achieve the effect of secondary ejection, and at the same time realize the function of cutting the rubber material in the mold.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, some simple deductions or substitutions can be made, which should be regarded as the protection scope of the present invention.

Claims (7)

1. The utility model provides a novel mouth of a river structure is cut in mould, includes movable mould subassembly, cover half subassembly and cutter unit spare, its characterized in that: the fixed die assembly comprises a fixed die base and a core fixing plate, the cutter assembly comprises a product thimble, a runner thimble and a glue opening thimble, a position avoiding groove used for containing the product thimble and the runner thimble is formed in the thimble fixing plate, the position avoiding groove extends into the thimble plate, the thimble plate is positioned between the thimble fixing plate and the movable die base, one end of the product thimble and one end of the runner thimble sequentially penetrate through the thimble fixing plate and the thimble plate, and a cavity and a core are respectively arranged in the cavity fixing plate and the core fixing plate;

the one end of goods thimble, runner thimble and jiao kou thimble all extends to the inside of die cavity, and the die cavity is used for the shaping goods, and the arranging well has been seted up to the inside of die core, and the arranging well is interior concavity, and is circular-arcly, and the one end of runner thimble is the barb, and the one end of jiao kou thimble is for beveling the cutting edge, and beveling cutting edge is 45 degrees oblique angles, and the internally mounted of thimble fixed plate has the return stroke pole that is used for resetting.

2. The novel in-mold cutting gate structure according to claim 1, characterized in that: one end of the product thimble and one end of the flow channel thimble, which penetrate through the thimble plate, are attached to the surface of the movable mold base, one end of the glue opening thimble is positioned in the thimble fixing plate, and the glue opening thimble is positioned between the product thimble and the flow channel thimble.

3. The novel in-mold cutting gate structure according to claim 2, characterized in that: one end of the return rod penetrates through the surface of the cavity fixing plate and extends beyond the surface of the cavity fixing plate, the highest point of the return rod is lower than the surface of the core fixing plate, and the highest point of the return rod is 0.5mm away from the core fixing plate.

4. A novel in-mold cutting gate structure according to any one of claims 1 to 3, characterized in that: the lowest point of the avoiding groove is spaced from one end of the product thimble and one end of the flow channel thimble by 1mm.

5. The novel in-mold cutting gate structure according to any one of claims 1 to 3, wherein: and a cushion block is arranged between the cavity fixing plate and the movable die base, and two ends of the cushion block are respectively attached to the surfaces of the cavity fixing plate and the movable die base.

6. The novel in-mold cutting gate structure according to claim 5, characterized in that: the die cavity fixing plate is internally provided with a guide pillar, the die core fixing plate is internally provided with a guide sleeve which is matched with the guide pillar, one end of the guide sleeve is attached to the surface of the cushion block, and the guide pillar and the guide sleeve are in clearance fit.

7. The novel in-mold cutting gate structure according to any one of claims 1 to 3, wherein: the movable mould base, the ejector pin plate, the ejector pin fixing plate and the cavity fixing plate as well as the fixed mould base and the core fixing plate are all abutted through screws, and the movable mould assembly and the fixed mould assembly are of a separated structure.

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