Die with long pipe fitting die sleeving structure

Abstract

The utility model belongs to the field of molds, and provides a mold with a long pipe fitting sleeve mold structure, which is characterized by comprising a mold body, a fixing groove for accommodating a movable insert pin and a cavity for forming an injection molding part are respectively formed between a rear mold core and a front mold core of the mold, and a long pipe fitting extends from the cavity to the outside of the mold. One end of the movable insert pin is limited in one end of the long pipe fitting, movable inserts are arranged at the positions, located in the cavity, of the joint of the movable insert pin and the long pipe fitting, and the positions, connected with the rear mold core and the front mold core, of the cavity respectively, and limiting grooves used for being in interference fit with the long pipe fitting are formed in the movable inserts. The end, close to the cavity, of the fixing groove is in small clearance fit with the movable insert, and the two sides of the fixing groove of the rear mold core are each provided with a plurality of sets of protruding first positioning pins. The long pipe fitting pre-pressing device can achieve the effect of pre-pressing the long pipe fitting, prevents the long pipe fitting from loosening due to injection pressure, can be better matched with glue sealing of the long pipe fitting, reduces the reject ratio of products, and improves competitiveness.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a mold with a structure for overmolding long pipe fittings. Background Art

[0002] In plastic molds, it is often necessary to overmold long pipe fittings by injection molding. Since it is difficult to clamp and position long pipe fittings, using a conventional slider structure or overmolding movable inserts and fixtures will make the mold structure complex and the mold manufacturing cost high. At the same time, it is not conducive to injection molding production operations, resulting in a high production defect rate and increasing the injection molding production cost. Summary of the Utility Model

[0003] In view of the above technical problems, the utility model provides a mold with a structure for overmolding long pipe fittings to solve the problem that the conventional slider structure or overmolding movable inserts and fixtures in the prior art will make the mold structure complex and the mold manufacturing cost high.

[0004] Other features and advantages of the present disclosure will become apparent from the following detailed description, or be learned in part through the practice of the present disclosure.

[0005] The utility model discloses a mold with a structure for overmolding long pipe fittings, which is characterized in that it includes a mold body. A fixed groove for accommodating movable ejector pins and a cavity for forming an injection molded part are respectively formed between the rear mold core and the front mold core of the mold. The long pipe fitting extends out of the mold from the cavity. One end of the movable ejector pin is limited inside one end of the long pipe fitting. The connection part of the movable ejector pin and the long pipe fitting is located in the cavity. Movable inserts are respectively arranged at the positions where the rear mold core and the front mold core border the cavity. The movable inserts are fixed by screws. A limiting groove for interference fit with the long pipe fitting is arranged on the movable insert. One end of the fixed groove close to the cavity is set to have a small clearance fit with the movable insert. Multiple groups of protruding first positioning pins are respectively arranged on both sides of the fixed groove of the rear mold core. Ejector pins are arranged in the fixed groove and the cavity of the rear mold core.

[0006] Further, the fixed groove passes through a hand-taking slot position that makes the movable ejector pin suspended.

[0007] Further, second positioning pins for limiting both sides of the long pipe fitting are arranged on the movable insert.

[0008] Further, magnets for adsorbing the movable ejector pins are arranged on the fixed groove.

[0009] The technical solution of the present disclosure has the following beneficial effects:

[0010] Based on the movable inserts that are respectively arranged on the rear mold core and the front mold core and have an interference fit with the long pipe fittings, a preloading effect can be achieved, preventing the long pipe fittings from loosening and retreating under the injection pressure. Moreover, it can better cooperate with the sealing of the long pipe fittings, reduce the defective rate of products, and improve competitiveness. Brief Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the overall structure of the mold in the embodiment of this specification;

[0012] Figure 2 It is a schematic diagram of the rear mold core structure in the embodiment of this specification;

[0013] Figure 3 is Figure 2 A top view structural schematic diagram after omitting the long pipe fittings, movable insert pins, and injection molded parts;

[0014] Figure 4 It is a schematic diagram of the structure of the front mold core in the embodiment of this specification;

[0015] Figure 5 It is a schematic diagram of the structure of the long pipe fittings, movable insert pins, and injection molded parts in the embodiment of this specification.

[0016] Among them, the description of the reference numerals:

[0017] 1. Mold; 101. Fixed groove; 102. Cavity; 11. Front mold core; 111. First positioning pin; 12. Rear mold core; 13. Long pipe fitting; 14. Movable insert pin; 15. Injection molded part; 16. Movable insert; 161. Limit groove; 162. Second positioning pin; 17. Manual extraction slot; 18. Ejector pin; 19. Magnet. Detailed Embodiment

[0018] Now, the exemplary embodiments will be described more fully with reference to the accompanying drawings.

[0019] The accompanying drawings are only schematic diagrams of the present disclosure. The same reference numerals in the drawings represent the same or similar parts, and thus their repeated description will be omitted. It can be understood that the proportions of the various components in the drawings do not constitute a limitation of the present disclosure.

[0020] Such as Figures 1-5As shown in the figure, an embodiment of this specification provides a mold 1 with a structure for overmolding 13 long pipe fittings. The mold 1 is characterized in that it includes a mold 1 body. Between the rear mold core 12 and the front mold core 11 of the mold 1, there are respectively formed a fixed groove 101 for accommodating the movable insert pin 14 and a cavity 102 for forming the injection molded part 15. The long pipe fitting 13 extends out of the mold 1 from the cavity 102. One end of the movable insert pin 14 is limited within one end of the long pipe fitting 13. The connection between the movable insert pin 14 and the long pipe fitting 13 is located in the cavity 102. At the positions where the rear mold core 12 and the front mold core 11 border the cavity 102, there are respectively provided movable inserts 16. The movable inserts 16 are fixed by screws. On the movable inserts 16, there are provided limiting grooves 161 for interference fit with the long pipe fitting 13. One end of the fixed groove 101 close to the cavity 102 is set for small clearance fit with the movable insert 16. On both sides of the fixed groove 101 of the rear mold core 12, there are respectively provided multiple groups of protruding first positioning pins 111. In the fixed groove 101 and the cavity 102 of the rear mold core 12, there is a ejector pin 18.

[0021] The fixed groove 101 passes through a hand - taking slot 17 that makes the movable insert pin 14 suspended. Among them, the provided hand - taking slot 17 enables the convenient removal of the movable insert pin 14 during discharging.

[0022] On the movable insert 16, there are provided second positioning pins 162 for limiting both sides of the long pipe fitting 13. The second positioning pins 162 prevent the long pipe fitting 13 from shifting left and right, facilitating the ejection of the long pipe fitting 13 by the ejector pin 18.

[0023] On the fixed groove 101, there is a magnet 19 for adsorbing the movable insert pin 14, which can prevent the movable insert pin 14 from loosening.

[0024] Working principle: The injection molded part 15 (made of PP material) is formed by overmolding the long pipe fitting 13 (a stretched pipe made of PP material with the mouth part expanded). The two are adhesively bonded in terms of material. In order to achieve overmolding and forming, the overmolding structure of the long pipe fitting 13 of the present utility model is designed. During operation, the long pipe fitting 13 to be overmolded is manually installed on the movable insert pin 14, and the insertion depth is limited by the tapered surface of the opening of the long pipe fitting 13. The movable insert pin 14 with the long pipe fitting 13 installed is placed together into the fixed groove 101 of the rear mold core 12 of the mold 1. The provided first positioning pin 111 and second positioning pin 162 play a guiding and positioning role for both the movable insert pin 14 and the long pipe fitting 13. The head of the movable insert pin 14 positioned by the cup head groove is provided at the head of the fixed groove 101 for lengthwise positioning, and the provided magnet 19 can prevent the movable insert pin 14 from loosening; for better cooperation and adjustment of the sealing glue at the position of the long pipe fitting 13, movable inserts 16 are installed on the rear mold core 12 and the front mold core 11. The long pipe fitting 13 has an interference fit with the front and rear movable inserts 16 during injection molding to achieve a preloading effect and prevent it from retracting due to the injection pressure; during ejection, the ejector pin 18 ejects the movable insert pin 14 and the injection molded part 15 to a reasonable distance to ensure that the product does not fall. The safety door of the injection molding machine is opened, and then the movable insert pin 14 and the injection molded part 15 are manually removed from the hand-taking slot 17. Finally, the movable insert pin 14 is manually pulled out to enter the next working cycle, thus meeting the normal production of such products.

[0025] Based on the movable inserts 16 provided on the rear mold core 12 and the front mold core 11 respectively and having an interference fit with the long pipe fitting 13, a preloading effect can be achieved, preventing the long pipe fitting 13 from retracting due to the injection pressure. Moreover, it can better cooperate with the sealing glue of the long pipe fitting 13, reduce the defective rate of the product, and improve the competitiveness of the product.

[0026] After considering the specification and practicing the utility model disclosed herein, those skilled in the art will readily conceive of other embodiments of the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include the well-known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure.

Claims

1. A mold with a long tube-in-beer structure, characterized in that: The invention comprises a mould body, wherein a fixing groove for accommodating a movable insert and a cavity for forming an injection moulded part are respectively formed between the rear mould core and the front mould core of the mould, the long tube extends from the cavity to the outside of the mould, one end of the movable insert is limited within one end of the long tube, the connection between the movable insert and the long tube is located in the cavity, movable inserts are respectively arranged at the positions of the cavity where the rear mould core and the front mould core are adjacent, the movable inserts are fixed by screws, a limiting groove for interference fit with the long tube is arranged on the movable insert, one end of the fixing groove close to the cavity is arranged to fit with the movable insert with a small gap, a plurality of groups of protruding first positioning pins are respectively arranged on both sides of the fixing groove of the rear mould core, and ejector pins are arranged in the fixing groove of the rear mould core and the cavity.

2. A mold with a long tube-in-beer structure according to claim 1, characterized in that: The fixing groove passes through a hand-taking groove which allows the movable inlay pin to be suspended in the air.

3. The mold with a long tube-in-beer structure according to claim 1, characterized in that: The movable insert is provided with a second positioning pin for limiting the two sides of the long tube.

4. The mold with a long tube-in-beer structure according to claim 1, characterized in that: The fixing groove is provided with a magnet for adsorbing the movable inlay pin.

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