Special delayed ejection structure

Abstract

The utility model discloses a special delayed ejection structure, which relates to the technical field of mold delayed ejection and comprises a base, the top of the base is fixedly connected with a mounting seat, the top of the mounting seat is fixedly connected with a limiting column, a delayed ejection module is arranged in the base and comprises an ejection rod, and the ejection rod is fixedly connected with the limiting column. Two sliding grooves are formed in one side of the ejector rod, a wedging base is slidably connected into the two sliding grooves, two penetrating holes are formed in one side of the mounting base, connecting pieces are movably connected into the two penetrating holes, reset springs are fixedly connected to the tops of the connecting pieces, and wedging pieces are fixedly connected to the bottoms of the connecting pieces. According to the special delayed ejection structure disclosed by the utility model, a delay does not need to be designed below an ejector pin of each product, the mold layout is simplified, meanwhile, the product can be directly ejected out when a multi-cavity product and a large number of ejector pins are used, and the effects of greatly simplifying the tedious degree of the mold and greatly simplifying the risk of demolding damage of the product are achieved.

Description

Technical Field

[0001] This utility model relates to the field of mold delayed ejection technology, and in particular to a special delayed ejection structure. Background Technology

[0002] Existing plastic products generally require injection molding through injection molds. Some plastic products have high requirements for dimensional accuracy, which in turn places high demands on the process of injection molding. For example, widely used products such as cash register barcode bottles need to be ejected in stages during the injection molding process; otherwise, the quality of the product cannot be guaranteed. For instance, the product gate is prone to damage, so the runner needs to be ejected first before the product is ejected. Or, in order to better separate the sprue material from the product, the product needs to be ejected first before the sprue material is ejected.

[0003] Existing ejection structures are only suitable for molded products with a single cavity. When the product is large and requires many ejector pins or the mold has a large number of cavities, a large number of delayed ejection structures are used to ensure the integrity of the demolded product. The mold layout is complex, and there are unstable situations such as position distribution and ejection time during production and use. The product ejection steps are cumbersome and increase the risk of product demolding damage. Summary of the Invention

[0004] This utility model discloses a special delayed ejection structure, which aims to solve the technical problems of complex mold layout, cumbersome product ejection steps, and increased product damage when existing ejection structures are used with a large number of cavities.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A special delayed ejection structure includes a base, a mounting seat fixedly connected to the top of the base, and a limiting post fixedly connected to the top of the mounting seat. A delayed ejection module is disposed inside the base, and the delayed ejection module includes a push rod. Two grooves are formed on one side of the push rod, and mating seats are slidably connected inside the two grooves. Two through holes are formed on one side of the mounting seat, and connecting members are movably connected inside the two through holes. A return spring is fixedly connected to the top of the connecting member, and a mating member is fixedly connected to the bottom of the connecting member, with the mating member located inside the mating seat. An ejector plate is fixedly connected to the outer wall of the limiting post, and one end of the return spring is fixedly connected to one side of the ejector plate. Multiple fixing seats are fixedly connected at equal intervals around the upper circumference of the ejector plate, and multiple product ejector pins are fixedly connected at equal intervals above the fixing seats.

[0007] In a preferred embodiment, the base has a telescopic rod inside, and the drive end of the telescopic rod is fixedly connected to a support plate. The bottom of the push rod is fixedly connected to one side of the support plate. Multiple circumferentially spaced circular holes are equally spaced on one side of the mounting base and the ejector plate. Multiple material head ejector pins are circumferentially fixedly connected to the top of the push rod, and each material head ejector pin is movably connected inside a circular hole. Limiting holes are opened on both sides of the push rod, and compression springs are movably connected inside both limiting holes. One end of the compression spring is fixedly connected to one side of the fitting seat, and the other end of the compression spring is fixedly connected to a compression cylinder. Movable grooves are opened on both sides of the base, and one end of each of the two compression cylinders moves movably inside the movable groove. Limiting holes are opened on the outer walls of both sides of the base, and push rods are movably connected inside both limiting holes.

[0008] In a preferred embodiment, the limiting post is externally movably connected to an annular mounting plate, and the top ends of multiple material head ejectors are fixedly connected to one end of the same annular mounting plate; multiple horn-shaped gates are movably connected to one side of the annular mounting plate, and one end of each horn-shaped gate is movably connected to one end of the multi-cavity product.

[0009] As can be seen from the above, the special delayed ejection structure provided by this utility model does not require the design of a delay below each product ejector pin, which simplifies the mold layout. At the same time, when facing multi-cavity products and a large number of ejector pins, the products can be ejected directly, which greatly simplifies the complexity of the mold and reduces the risk of product demolding damage. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of a special delayed ejection structure proposed in this utility model.

[0011] Figure 2 This is a schematic diagram of the delay module part of a special delayed ejection structure proposed in this utility model.

[0012] Figure 3 This is a cross-sectional structural diagram of the base and mounting seat of a special delayed ejection structure proposed in this utility model.

[0013] Figure 4 This is a cross-sectional schematic diagram of the push rod in the delayed ejection module of a special delayed ejection structure proposed in this utility model.

[0014] In the attached diagram: 1. Base; 2. Mounting seat; 3. Delayed ejection module; 301. Telescopic rod; 302. Support plate; 303. Ejector rod; 304. Return spring; 305. Ejector plate; 306. Push rod; 307. Connector; 308. Annular mounting plate; 309. Fitting part; 310. Extrusion cylinder; 311. Extrusion spring; 312. Fitting seat; 4. Fixed seat; 5. Product ejector pin; 6. Multi-cavity product; 7. Material head ejector pin; 8. Limiting post; 9. Horn gate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] The special delayed ejection structure disclosed in this utility model is mainly applied to scenarios where existing ejection structures are used for a large number of cavities, the mold layout is complex, the product ejection steps are cumbersome, and product damage is increased.

[0017] Reference Figures 1-4 A special delayed ejection structure includes a base 1, a mounting seat 2 fixedly connected to the top of the base 1, and a limiting post 8 fixedly connected to the top of the mounting seat 2. A delayed ejection module 3 is provided inside the base 1, and the delayed ejection module 3 includes a push rod 303. Two sliding grooves are opened on one side of the push rod 303, and a mating seat 312 is slidably connected inside the two sliding grooves. Two through holes are opened on one side of the mounting seat 2, and a connector 307 is movably connected inside the two through holes. A return spring 304 is fixedly connected to the top of the connector 307, and a mating part 309 is fixedly connected to the bottom of the connector 307. The mating part 309 is located inside the mating seat 312. An ejector plate 305 is fixedly connected to the outer wall of the limiting post 8, and one end of the return spring 304 is fixedly connected to one side of the ejector plate 305. Multiple fixing seats 4 are fixedly connected at equal intervals around the upper circumference of the ejector plate 305, and multiple product ejector pins 5 are fixedly connected at equal intervals above the fixing seats 4.

[0018] Reference Figure 2 , Figure 3 and Figure 4In a preferred embodiment, a telescopic rod 301 is provided inside the base 1, and a support plate 302 is fixedly connected to the driving end of the telescopic rod 301. The bottom of the push rod 303 is fixedly connected to one side of the support plate 302. Multiple circumferentially spaced circular holes are equally spaced on one side of the mounting base 2 and the ejector plate 305. Multiple material head ejector pins 7 are fixedly connected to the top of the push rod 303 at equal circumferential distances. The multiple material head ejector pins 7 are movably connected to the inside of the circular holes. Limiting holes are provided on both sides of the push rod 303. A compression spring 311 is movably connected inside the two limiting holes. One end of the compression spring 311 is fixedly connected to one side of the fitting base 312, and the other end of the compression spring 311 is fixedly connected to a compression cylinder 310. Movable grooves are provided on both sides of the base 1. One end of the two compression cylinders 310 is movably connected inside the movable grooves. Limiting holes are provided on both outer walls of the base 1. Push rods 306 are movably connected inside the two limiting holes.

[0019] Reference Figure 2 and Figure 3 In a preferred embodiment, the limiting post 8 is externally connected to an annular mounting plate 308, and the top ends of multiple material head ejector pins 7 are fixedly connected to one end of the same annular mounting plate 308; multiple horn-shaped gates 9 are movably connected to one side of the annular mounting plate 308, and one end of the multiple horn-shaped gates 9 is movably connected to one end of the multi-cavity product 6.

[0020] Working principle: When the mold is put into production, the molding machine ejector roller is connected to the telescopic rod 301 on the mold. When the molding machine ejector roller pushes the telescopic rod 301 on the mold, the ejector rod 303 moves upward, causing the ejector pin 7 of the sprue to move and eject the sprue head, so that the horn gate 9 is separated from the product. At this time, the product ejector pin 5 remains stationary. The telescopic rod 301 is activated, and the telescopic rod 301 causes the ejector rod 303 to move. When the ejector rod 303 moves to above the limit hole on one side of the base 1, the mating part 309 is located inside the mating seat 312, and the compression spring 311 uses its own elasticity. The extrusion cylinder 310 moves into the limiting hole, and the ejector rod 303 drives the connecting piece 307 to overcome the elasticity of the return spring 304 and drive multiple product ejector pins 5 above the ejector plate 305 to move, so that the product ejector pins 5 eject the product. This simplifies the mold layout. At the same time, when facing multi-cavity products 6 and a large number of ejector pins, the product can be ejected directly, which greatly simplifies the complexity of the mold and the risk of product demolding damage. It also avoids the product ejection deformation caused by inconsistent smoothness due to various reasons when setting multiple product ejector pins 5 delay structures, thus improving production stability.

[0021] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A special delayed ejection structure comprising a base (1), characterized in that, The top of the base (1) is fixedly connected with a mounting seat (2), and the top of the mounting seat (2) is fixedly connected with a limiting column (8), the inside of the base (1) is provided with a delayed ejection module (3), and the delayed ejection module (3) comprises a top rod (303), and two sliding grooves are formed in the side of the top rod (303), and the inside of the two sliding grooves is slidably connected with a fitting seat (312), the side of the mounting seat (2) is provided with two through holes, and the inside of the two through holes is movably connected with a connecting piece (307), the top of the connecting piece (307) is fixedly connected with a return spring (304), and the bottom of the connecting piece (307) is fixedly connected with a fitting piece (309), and the fitting piece (309) is located in the inside of the fitting seat (312), the outer wall of the limiting column (8) is fixedly connected with a thimble plate (305), and one end of the return spring (304) is fixedly connected to the side of the thimble plate (305), a plurality of fixed seats (4) are fixedly connected to the upper side of the thimble plate (305) at equal intervals, and a plurality of product thimbles (5) are fixedly connected to the upper side of the fixed seat (4) at equal intervals.

2. A special delayed ejection structure according to claim 1, characterized in that The inside of the base (1) is provided with a telescopic rod (301), and the driving end of the telescopic rod (301) is fixedly connected with a supporting plate (302), and the bottom of the top rod (303) is fixedly connected to the side of the supporting plate (302).

3. A special delayed ejection structure according to claim 2, characterized in that The side of the mounting seat (2) and the thimble plate (305) is equally provided with a plurality of circumferentially equidistant round holes, and the top of the top rod (303) is fixedly connected with a plurality of material head thimbles (7) at equal intervals, and the plurality of material head thimbles (7) are movably connected in the inside of the round hole.

4. A special delayed ejection structure according to claim 1, wherein The two sides of the top rod (303) are provided with limiting holes, and the inside of the two limiting holes is movably connected with an extrusion spring (311), one end of the extrusion spring (311) is fixedly connected to the side of the fitting seat (312), and the other end of the extrusion spring (311) is fixedly connected with an extrusion cylinder (310).

5. A special delayed ejection structure according to claim 4, characterized in that The two sides of the base (1) are provided with movable grooves, and one end of the two extrusion cylinders (310) is movably arranged in the inside of the movable groove, and the outer wall of the base (1) is provided with limiting holes, and the inside of the two limiting holes is movably connected with a push rod (306).

6. A special delayed ejection structure according to claim 1, wherein The outside of the limiting column (8) is movably connected with an annular mounting plate (308), and the top end of the plurality of material head thimbles (7) is fixedly connected to one end of the same annular mounting plate (308).

7. A special delayed ejection structure according to claim 6, characterized in that The side of the annular mounting plate (308) is movably connected with a plurality of horn gates (9), and one end of the plurality of horn gates (9) is movably connected to one end of the multi-hole product (6).

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