CN216782483U - Double-color mold structure of suction head - Google Patents

Abstract

The utility model provides a double-color die structure of a suction head, which aims to solve the problem that a product is easy to damage due to strong demoulding of an injection die, and comprises a front die, a first front die core, a second front die core, a first rear die, a second rear die, a first push cylinder, a first rear die insert, a movable insert and a driving assembly, wherein the first front die core is arranged in the front die, the second front die core is arranged in the front die, the first push cylinder, the first rear die insert and the first front die core are matched to form a main body part forming cavity, one end of the movable insert, the main body part and the second front die core are matched to form a suction part forming cavity, and the driving assembly is used for driving the movable insert to be close to or far away from the other end of the second front die core. According to the double-color die structure of the suction head, when the suction head product is forcibly stripped and demoulded, the suction head product is not easily damaged.

Description

Double-color mold structure of suction head

Technical Field

The utility model relates to an injection mold, in particular to a double-color mold structure of a suction head.

Background

The suction head is a disposable consumable product and is used for any application in molecular biology and genetic research, a protective structure is effectively formed between a liquid transfer device and a sample, and the safety of sample suction and separation is ensured. The suction head is also commonly used as a medical instrument, while the existing medical suction head is generally formed by injection molding through a double-color mold, a main body part of the suction head is formed by injection molding through a hard glue material, and a suction part which is fixed at the tail end of the main body part and used for sucking samples is formed by injection molding through a soft glue material, and the suction part is provided with an inverted buckle structure; the double-color mould structure of current production suction head, because back-off structure texture is softer, the suction head product is taken off the demolding by force, but it causes the damage to the suction head product easily.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a double-color die structure of a suction head, which is not easy to damage a suction head product when the suction head product is forcibly stripped and demoulded.

The two-color mold structure of the suction head comprises a front mold, a first front mold core, a second front mold core, a first rear mold, a second rear mold, a first push cylinder, a first rear mold insert, a movable insert and a driving assembly, wherein the first front mold core is arranged in the front mold, the second front mold core is arranged in the front mold, the first push cylinder is used for being arranged on the first rear mold and enabling the first push cylinder to abut against one end of the first front mold core, the first push cylinder is also used for being arranged on the second rear mold and enabling the first push cylinder to abut against one end of the second front mold core, the first rear mold insert is used for being inserted into the first push cylinder in a penetrating manner and enabling the first rear mold insert to be inserted into the first front mold core, and therefore the first push cylinder, the first rear mold insert and the first front mold core are matched to form a main body part forming cavity, the first rear mold insert is further used for inserting the first push cylinder in a penetrating mode, the first rear mold insert is inserted into the second front mold core, the movable insert is connected in the front mold in a sliding mode, one end of the movable insert abuts against the other end of the second front mold core, when the first rear mold insert is inserted into the second front mold core, one end of the movable insert, the main body portion and the second front mold core are matched to form a suction portion forming cavity, the driving assembly is connected with the movable insert, and the driving assembly is used for driving the movable insert to be close to or far away from the other end of the second front mold core.

The double-color mold structure of the suction head provided by the embodiment of the utility model at least has the following beneficial effects: before injection molding, the driving assembly can drive the movable insert to be close to the other end of the second front mold core, so that a suction part forming cavity is formed, normal injection molding is carried out, and a suction head product with an inverted buckle structure is formed; and after injection moulding, the drive assembly can drive the movable mold insert to keep away from the other end of the second front mold core, so that the reverse-buckling structure is kept away, the reverse-buckling structure is released, a forced demoulding space is reserved for the reverse-buckling structure, and when a suction head product is forced to be demoulded, the reverse-buckling structure is released from the moulding cavity, so that the suction head product is not easy to be damaged.

According to some embodiments of the utility model, the removable insert is provided with a second locating hole for insertion of the first back mold insert and positioning of the first back mold insert.

According to some embodiments of the utility model, the mold further comprises a front mold positioning insert, one end of the front mold positioning insert abuts against the other end of the first front mold core, the front mold positioning insert is provided with a first positioning hole, and the first positioning hole is used for inserting the first rear mold insert and positioning the first rear mold insert.

According to some embodiments of the present invention, the mold further comprises a front mold insert, one end of the front mold insert abuts against the other end of the first front mold core, the front mold insert is provided with a thin-wall hole, the thin-wall hole is used for inserting the first rear mold insert, and the front mold insert and the first front mold core are matched to form an attachment portion forming cavity, the end of the main body portion is provided with an attachment portion, and the suction portion is fixed on the attachment portion.

According to some embodiments of the utility model, an inner side wall of the thin-walled hole is provided with a fixing groove.

According to some embodiments of the utility model, the mold further comprises a front mold suction insert, one end of the front mold suction insert abuts against the other end of the second front mold core, the other end of the front mold suction insert abuts against the one end of the movable insert, the front mold suction insert is provided with a suction hole, and when the first rear mold insert is inserted into the suction hole, the one end of the movable insert, the main body and the front mold suction insert cooperate to form the suction part molding cavity.

According to some embodiments of the utility model, the driving assembly further includes a base, the driving assembly includes an elastic member, one end of the elastic member is connected to the movable insert, the other end of the elastic member is connected to the second front mold core, the elastic member is used for making the movable insert away from the other end of the second front mold core, the front mold is movably connected to the base, and the base is used for abutting against the front mold and making the other end of the movable insert abut against the base, so that the one end of the movable insert is close to the other end of the second front mold core.

According to some embodiments of the utility model, the injection molding device further comprises a first corner hot nozzle, the first corner hot nozzle is arranged in the first front mold core and communicated with the main body part molding cavity, and the first corner hot nozzle is used for injection molding of the main body part molding cavity.

According to some embodiments of the utility model, further comprising a second angled thermal nozzle disposed within the front mold suction insert, the second angled thermal nozzle in communication with the suction portion-forming cavity, the second angled thermal nozzle for injection molding the suction portion-forming cavity.

According to some embodiments of the present invention, the mold further comprises a second push cylinder and a second rear mold insert, the second push cylinder is configured to be mounted on the first rear mold and make the second push cylinder abut against the end of the first front mold core, and the second push cylinder is further configured to be mounted on the second rear mold and make the second push cylinder abut against the end of the second front mold core; the second rear mold insert is used for inserting the second push cylinder in a penetrating manner and inserting the second rear mold insert into the first front mold core, so that the second push cylinder, the second rear mold insert and the first front mold core are matched to form a main body part forming cavity, the second rear mold insert is also used for inserting the second push cylinder in a penetrating manner and inserting the second rear mold insert into the second front mold core, and therefore the end of the movable insert, the main body part and the second front mold core are matched to form the suction part forming cavity.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an overall assembly diagram of a two-color mold structure according to an embodiment of the present invention;

FIG. 2 is a schematic front view of a cross-sectional structure of the two-color mold structure shown in FIG. 1;

FIG. 3 is a partial enlarged view of the bicolor mold of FIG. 2 at configuration A;

FIG. 4 is a partial enlarged view of the two-color mold structure C shown in FIG. 3;

FIG. 5 is a partial enlarged view of the two-color mold structure B shown in FIG. 2;

FIG. 6 is a partial enlarged view of the two-color mold structure D shown in FIG. 5;

fig. 7 is a schematic top view of the cross-sectional structure of the two-color mold structure shown in fig. 1.

Reference numerals:

a front mold 100;

a first front mold 200 and a second front mold 300;

a first rear mold 400, a second rear mold 500;

a first pusher 600, a first back mold insert 700;

removable insert 800, second locating hole 810;

a driving assembly 900, an elastic member 910;

a main body part molding cavity 1000, a suction part molding cavity 1100, and an attachment part molding cavity 1200;

a main body part 1300, a suction part 1400, an inverted buckle structure 1410, and an attachment part 1500;

a front mold locating insert 1600, a first locating hole 1610;

attaching a front mold insert 1700, a thin-wall hole 1710 and a fixing groove 1711;

the front mold sucking insert 1800 and the sucking hole 1810;

a substrate 1900;

a first angled heated nozzle 2000, a second angled heated nozzle 2100;

second pusher 2200, second back mold insert 2300.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the positional or orientational descriptions, such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "pointed", "inner", "outer", "axial", "radial", "circumferential", etc., are given with reference to the positional or orientational relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, the sidewall means a left sidewall and/or a right sidewall.

In the description of the present invention, "a plurality" means two or more, "more than", "less than", "more than", and the like are understood as excluding the essential numbers, and "more than", "less than", "inside", and the like are understood as including the essential numbers. If the description of "first" and "second" is used for the purpose of distinguishing technical features, the description is not intended to indicate or imply relative importance or to implicitly indicate the number of the indicated technical features or to implicitly indicate the precedence of the indicated technical features.

In the description of the present invention, it should be understood that "a is disposed on B" and "a is disposed on B" merely express the connection relationship between a and B, and do not represent that a is above B.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. "bolted" and "screwed" are equally interchangeable. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

In the present invention, it is to be understood that the words "front mold", "rear mold", "mold core", "insert", "gate", "molding cavity", etc. are common terms in the molding industry, and are well known concepts of those skilled in the molding art, and therefore, they are not explained in detail in this patent.

Referring to fig. 1 to 7, a two-color mold structure of a suction head according to an embodiment of the present invention includes a front mold 100, a first front mold core 200, a second front mold core 300, a first rear mold 400, a second rear mold 500, a first push cylinder 600, a first rear mold insert 700, a movable insert 800, and a driving assembly 900, the first front mold core 200 is disposed in the front mold 100, the second front mold core 300 is disposed in the front mold 100, the first push cylinder 600 is configured to be mounted on the first rear mold 400 and make the first push cylinder 600 abut against one end of the first front mold core 200, the first push cylinder 600 is further configured to be mounted on the second rear mold 500 and make the first push cylinder 600 abut against one end of the second front mold core 300, the first rear mold insert 700 is configured to be inserted into the first push cylinder 600 and make the first rear mold insert 700 be inserted into the first front mold core 200, so that the first push cylinder 600, the first rear mold core 700, and the first front mold core 200 cooperate to form a molding cavity 1000, the first rear mold insert 700 is further used for inserting the first push cylinder 600, and inserting the first rear mold insert 700 into the second front mold core 300, the movable insert 800 is slidably connected into the front mold 100, one end of the movable insert 800 abuts against the other end of the second front mold core 300, when the first rear mold insert 700 is inserted into the second front mold core 300, one end of the movable insert 800, the main body 1300 and the second front mold core 300 are matched to form a suction portion forming cavity 1100, the driving assembly 900 is connected with the movable insert 800, and the driving assembly 900 is used for driving the movable insert 800 to be close to or far away from the other end of the second front mold core 300.

The double-color mold refers to a Baidu encyclopedia double-color mold, namely a mold in which two plastic materials are injected and molded on the same injection molding machine in two times, but a product is only subjected to mold stripping once. The suction head product formed by injection molding of the mold comprises a main body part 1300 and a suction part 1400 (fixed at the tail end of the main body part 1300), wherein the suction part 1400 is provided with an inverted buckle structure 1410; the reverse buckle is a common structure in an injection mold, and a product produced by the mold reverse buckle injection molding has a reverse buckle structure 1410 thereon; the forced demoulding is also directed at the inverted buckle structure 1410, and the forced demoulding, specifically, forced demoulding, refers to that an inverted buckle exists on a workpiece in an injection mould, a special core-pulling mechanism is not adopted, but the workpiece is directly forced to be ejected out of the mould, and the inverted buckle is not large generally, and the material of the workpiece has certain plasticity and toughness; according to the suction head product formed by injection molding, the main body part 1300 is formed by injection molding of a hard glue material, and the suction part 1400 (comprising the inverted buckle structure 1410) is formed by injection molding of a soft glue material, so that even if the inverted buckle structure 1410 of the suction head product formed by injection molding is large in opening angle, a mold is designed and a product is produced conveniently (only a certain space is reserved above the inverted buckle structure 1410, the product is convenient to mold, the suction head product (particularly the inverted buckle structure 1410 of the suction head) is not easy to damage, and the space is not reserved on the side of the inverted buckle structure 1410), and the suction head product is molded by adopting a mode of forced mold stripping.

The injection molding process of the two-color mold of the present embodiment is detailed (the first front mold core 200 and the second front mold core 300 are already installed in the front mold 100):

the first injection molding, the first rear mold insert 700 is loaded (inserted, i.e., inserted into the hole and fixed by fitting) into the first barrel 600, the first barrel 600 is loaded into the first rear mold 400, the first rear mold 400 and the front mold 100 are closed, meanwhile, the first rear mold insert 700 is inserted into the first front mold core 200, the first push cylinder 600 abuts against one end of the first front mold core 200, therefore, the first push cylinder 600, the first rear mold insert 700 and the first front mold insert 200 are matched to form a main body part forming cavity 1000 (a blind hole is formed in the first front mold insert 200, one end of the blind hole is not communicated, the other end of the blind hole is blocked by the first push cylinder 600, the first rear mold insert 700 is inserted into the hole, and an injection molding gap is formed between the outer side wall of the first rear mold insert 700 and the inner side wall of the hole), and then the ebonite material is injected into the main body part forming cavity 1000 through the pouring gate on the first front mold insert 200 to form a main body part 1300 of a suction head product, so that the first injection molding work is completed. The second injection molding is performed, the first plunger 600, the first rear mold insert 700 (installed in the first plunger 600) and the main body 1300 (coated on the first rear mold insert 700) are taken out, the first plunger 600 is installed in the second rear mold 500 by rotating the two-color mold rear half (i.e. the first rear mold 400, the second rear mold 500 and the parts inside thereof) 180 degrees, the second rear mold 500 and the front mold 100 are closed (the first plunger 600 abuts against one end of the second front mold 300), meanwhile, the first rear mold insert 700 is inserted into the second front mold 300, the outer side wall of the end of the main body 1300 and the inner side wall of the through hole of the second front mold 300 are closed, one end of the movable insert 800 abuts against the other end of the second front mold 300, so that one end of the movable insert 800, the main body 1300 and the second front mold 300 are matched to form (the main body 300 is a through hole, and one end is blocked by the main body 1300, and the other end is sealed by the movable insert 800, the first rear mold insert 700 is inserted into the through hole, and injection molding gaps are formed between the outer side wall of the end of the first rear mold insert 700 and the inner side wall of the through hole, and the side wall of the movable insert 800) and the suction part molding cavity 1100, and then a soft rubber material is injected to the suction part molding cavity 1100 through the gate on the second front mold core 300 to form the suction part 1400 of the suction head product, thereby completing the second injection molding operation. Stripping, wherein the driving assembly 900 drives the movable insert 800 to be away from the other end of the second front mold core 300, so as to be away from the inverted structure 1410, and the inverted structure 1410 is released, so that a strong stripping space is reserved for the inverted structure 1410, and when a sucker product is forced to be stripped, the inverted structure 1410 is stripped from the molding cavity, so that the sucker product is not easily damaged; after the mold stripping operation is completed, the driving assembly 900 drives the movable insert 800 to approach to the other end of the second front mold core 300 again until the movable insert abuts against the other end of the second front mold core, so as to wait for forming the suction portion forming cavity 1100, perform a normal injection molding operation, form a suction head product with the undercut structure 1410, and wait for a second injection molding operation of the mold next time.

It should be understood that the end of the insert pin of the first rear mold 400 can abut against the first front mold 200 (or be inserted into a small positioning hole at the end of the first front mold 200), so that the end of the injection-molded suction head product is not closed; or the injection-molded sucker product with a closed end can be subjected to subsequent treatment.

Hard rubber material and soft rubber material: in the general plastic industry, plastics such AS PP, PE and the like with light specific gravity and relatively low material surface hardness are called soft glue, while plastics such AS PS, ABS, AS, hard PVC and the like are called hard glue; in fact, soft glue and hard glue are only relative speaking, PE and PP in the general plastic industry belong to soft glue, but the materials can be regarded as hard materials compared with flexible plastics such as soft PVC, silica gel, EVA, POE, TPES and the like.

Referring to fig. 2, 5 and 6, in some embodiments of the present invention, removable insert 800 is provided with a second locating hole 810, second locating hole 810 being for insertion of first rear mold insert 700 and positioning of first rear mold insert 700.

A second positioning hole 810 is formed, and after the first rear mold insert 700 is inserted, the first rear mold insert is positioned in the second positioning hole 810 without deflection, so that the produced suction head product cannot deflect and waste products can be produced; and the end of the first rear mold insert 700 is thin and inserted into the second positioning hole 810, the first rear mold insert 700 can be prevented from bending and breaking. It should be understood that after the first rear mold insert 700 is inserted into the second positioning hole 810, the first rear mold insert 700 will (substantially or completely) block the opening of the second positioning hole 810 near the second front mold core 300, so as to substantially seal the suction portion forming cavity 1100, and thus the second injection molding operation can be normally performed; it should be further appreciated that the distal portion of first back mold insert 700, as it approaches the distal-most end of first back mold insert 700, has a decreasing diameter, and therefore, is sealed by a natural stop after first back mold insert 700 is inserted into second locator bore 810.

Referring to fig. 2, 3 and 4, in some embodiments of the present invention, the present invention further includes a front mold positioning insert 1600, one end of the front mold positioning insert 1600 abuts against the other end of the first front mold core 200, the front mold positioning insert 1600 is provided with a first positioning hole 1610, the first positioning hole 1610 is used for inserting the first rear mold insert 700 and positioning the first rear mold insert 700.

The front mold positioning insert 1600 and the first positioning hole 1610 are arranged, after the first rear mold insert 700 is inserted, the front mold positioning insert 1600 can be inserted into the first positioning hole 1610 of the front mold positioning insert 1600 and positioned in the first positioning hole 1610, and no deflection is generated, so that the produced suction head product can be prevented from deflecting and generating waste products; and the tip of the first rear mold insert 700 is thin and inserted into the first positioning hole 1610, so that the first rear mold insert 700 can be prevented from bending and breaking. The first locating hole 1610 is disposed on the front mold locating insert 1600, and the front mold locating insert 1600 is an independent part, which reduces the difficulty of processing the first front mold core 200. It should be understood that after the first rear mold insert 700 is inserted into the first positioning hole 1610, the first rear mold insert 700 will block (substantially or completely) the opening of the first positioning hole 1610 near the first front mold core 200, so as to substantially seal the main body molding cavity 1000, and enable the first injection molding operation to be performed normally; it should be further understood that the distal portion of the first back mold insert 700 is gradually reduced in diameter as it gets closer to the extreme end of the first back mold insert 700, so that the first back mold insert 700 is naturally restrained and sealed after being inserted into the first positioning hole 1610.

Referring to fig. 2, 3 and 4, in some embodiments of the present invention, the present invention further includes an attached front mold insert 1700, one end of the attached front mold insert 1700 abuts against the other end of the first front mold core 200, the attached front mold insert 1700 is provided with a thin-walled hole 1710, the thin-walled hole 1710 is used for inserting the first rear mold insert 700, and the attached front mold insert 1700 and the first front mold core 200 are matched to form an attached portion forming cavity 1200, the end of the main body 1300 is provided with an attached portion 1500, and the suction portion 1400 is fixed on the attached portion 1500.

Referring to the above, the attachment portion forming cavity 1200 is located at the end of the main body portion forming cavity 1000 and is communicated with the main body portion forming cavity 1000, and during the first injection molding operation, the main body portion forming cavity 1000 and the attachment portion forming cavity 1200 are injection molded together by the hard adhesive material, that is, the main body portion 1300 and the attachment portion 1500 of the tip product are integrally molded together. The attachment part 1500 and the corresponding attachment part forming cavity 1200 are arranged, so that the connection area between the suction part 1400 and the hard rubber part (namely the main body part 1300 and the attachment part 1500) of the suction head product is larger, the connection is more stable, and the suction head product is not easy to separate. And the inner side of the suction part 1400 is provided with a hard support, so that the suction head is more convenient to use and has better suction performance. It should be understood that the diameter of the thin-walled hole 1710 is small relative to the diameter of the hole in the first front core (i.e., the hole constituting the molding cavity into which the first rear mold insert 700 is inserted), so that after the first rear mold insert 700 is inserted into the thin-walled hole 1710, the gap between the outer sidewall of the first rear mold insert 700 and the inner sidewall of the thin-walled hole 1710 is small, and thus the thickness of the injection-molded attachment portion 1500 is small, i.e., the attachment portion 1500 has a thin-walled structure. It is to be understood that in some embodiments, the other end of the attached premold insert 1700 abuts the premold positioning insert 1600.

Referring to fig. 3 and 4, in some embodiments of the utility model, the inner sidewall of the thin-walled hole 1710 is provided with a seating groove 1711.

The inner side wall of the thin-wall hole 1710 is provided with a fixing groove 1711, after the attachment part 1500 is injection molded and after the suction part 1400 is subsequently injection molded, a fixing convex part (formed by filling the fixing groove 1711 with a hard glue injection molding material) is formed on the outer side wall of the attachment part 1500, a fixing concave part is formed on the inner side wall of the suction part 1400, and the fixing convex part and the fixing concave part are connected in an embedded manner, so that the connection between the suction part 1400 and the attachment part 1500 is more stable and firm and is not easy to separate; particularly, when the suction portion 1400 is forcibly removed from the mold, the suction portion 1400 and the attachment portion 1500 are easily separated by pulling due to a large suction force between the suction portion 1400 and the front mold 100 or a large resistance applied to the flip-chip structure 1410.

Referring to fig. 2, 5 and 6, in some embodiments of the present invention, a front mold suction insert 1800 is further included, one end of front mold suction insert 1800 abuts against the other end of second front mold core 300, the other end of front mold suction insert 1800 abuts against one end of movable insert 800, front mold suction insert 1800 is provided with a suction hole 1810, and when first rear mold insert 700 is inserted into suction hole 1810, one end of movable insert 800, body 1300 and front mold suction insert 1800 cooperate to form a suction portion molding cavity 1100.

Since the hard glue material and the soft material are different in shape, the core part of the front mold 100 constituting the suction-portion molding cavity 1100 is separately formed as one part, i.e., the front mold suction insert 1800, and one end of the movable insert 800, the body part 1300 (or the attachment part 1500), and the front mold suction insert 1800 cooperate to form the suction-portion molding cavity 1100; so that the shape of the front mold extraction insert 1800 is also different from other parts of the mold, such as soft-wood material versus hard-wood material. The shrinkage rate and the adhesion to other materials are different, and the front mold suction insert 1800 may be made of a material to which the software material is not easily adhered, so as to prevent the software material (suction part 1400) from adhering to the front mold 100.

Referring to fig. 2, 5 and 6, in some embodiments of the present invention, the driving assembly 900 further includes a base 1900, the elastic member 910 is connected to the movable insert 800 at one end, the other end of the elastic member 910 is connected to the second front mold core 300, the elastic member 910 is used to make the movable insert 800 away from the other end of the second front mold core 300, the front mold 100 is movably connected to the base 1900, and the base 1900 is used to abut against the front mold 100, so that the other end of the movable insert 800 abuts against the base 1900, so that one end of the movable insert 800 is close to the other end of the second front mold core 300.

Before the second injection molding operation, the front mold 100 and the base 1900 are normally connected together, and the other end of the removable insert 800 abuts against the base 1900, so that the removable insert 800 is pressed against the second front mold core 300, and simultaneously the elastic member 910 accumulates elastic force, so that one end of the removable insert 800, the main body 1300, and the second front mold core 300 cooperate to form the pick-up molding cavity 1100; after the second injection molding operation (i.e., when the mold stripping operation is performed), the front mold 100 and the base 1900 are away from each other, so that the other end of the movable insert 800 is no longer (or temporarily) stopped and limited by the base 1900, and under the action of the elastic member 910, the elastic member 910 releases the elastic force, so that the movable insert 800 is away from the second front mold core 300, and is away from the undercut structure 1410, the undercut structure 1410 is released, a strong stripping space is left for the undercut structure 1410, and the undercut structure 1410 is conveniently stripped from the molding cavity when the tip product is removed from the mold by force; after the demolding operation is completed, the front mold 100 and the base 1900 are normally connected again to wait for the next second injection molding operation. It is understood that the elastic member 910 may be a spring, an elastic sheet, an elastic plastic, etc. It should be understood that the front mold 100 and the base 1900 may be movably connected by one or more of sliding connection, bolt connection, snap connection, etc. It should be understood that the elastic member 910 may be replaced by an indirect driving structure such as a magnetic suction device, an air suction device, or a direct driving structure such as an air cylinder, a motor, or the like. It should be understood that the front mold 100 may be divided into a first front mold for receiving the first front mold core 200 and a second front mold for receiving the second front mold core 300, and when the front mold 100 is separated from the base body 1900, only the second front mold is required to be separated from the base body 1900, but the first front mold is not required to be separated from the base body 1900.

Referring to fig. 2, 3 and 4, in some embodiments of the present invention, a first corner hot nozzle 2000 is further included, the first corner hot nozzle 2000 is disposed in the first front mold core 200, the first corner hot nozzle 2000 is in communication with the body part molding chamber 1000, and the first corner hot nozzle 2000 is used to injection mold the body part molding chamber 1000.

The (first and second) angle type hot nozzles can inject plastic into the molding cavity from different angles compared with the traditional hot nozzle, so that the selection of the position of a pouring gate is convenient. In the present embodiment, the first angled hot nozzle 2000 is 90 degrees and injection molding is performed from the side of the main body portion forming cavity 1000. It will be appreciated that the hot nozzle is part of a hot runner system, which is employed to facilitate injection molding filling of the fine product (tip).

Referring to fig. 3 and 7, in some embodiments of the present invention, a second angle hot nozzle 2100 is further included, the second angle hot nozzle 2100 being disposed in the front mold suction insert 1800, the second angle hot nozzle 2100 being in communication with the suction portion-forming cavity 1100, the second angle hot nozzle 2100 being used for injection molding of the suction portion-forming cavity 1100.

Compared with the traditional hot nozzle, the angle type hot nozzle can inject plastic into the forming cavity from different angles, so that the selection of a pouring gate position is facilitated. In the present embodiment, the first angled hot nozzle 2000 is substantially 30 degrees, and injection molding is performed from above the side of the suction part-forming chamber 1100. It will be appreciated that the hot nozzle is part of a hot runner system, which is employed to facilitate injection molding filling of the fine product (tip).

Referring to fig. 2, 3, 5 and 7, in some embodiments of the present invention, a second push cylinder 2200 and a second rear mold insert 2300 are further included, the second push cylinder 2200 is configured to be mounted on the first rear mold 400 such that the second push cylinder 2200 abuts against one end of the first front mold core 200, and the second push cylinder 2200 is further configured to be mounted on the second rear mold 500 such that the second push cylinder 2200 abuts against one end of the second front mold core 300; the second rear mold insert 2300 is used for inserting and connecting the second pusher 2200, and inserting the second rear mold insert 2300 into the first front mold core 200, so that the second pusher 2200, the second rear mold insert 2300 and the first front mold core 200 cooperate to form the main body molding cavity 1000, and the second rear mold insert 2300 is also used for inserting and connecting the second pusher 2200, and inserting the second rear mold insert 2300 into the second front mold core 300, so that one end of the movable insert 800, the main body 1300 and the second front mold core 300 cooperate to form the suction portion molding cavity 1100.

It should be understood that the second plunger 2200 and the first plunger 600 are made of the same material and the like, and the second rear mold insert 2300 is the same. Therefore, when the first rear mold insert 700 is inserted into the second front mold core 300 and the first rear mold insert 700 is subjected to the second injection molding (the rear half of the two-color mold is rotated by 180 degrees), the second rear mold insert 2300 is simultaneously inserted into the first front mold core 200, and the first injection molding operation is performed on the second rear mold insert 2300; after the second injection molding of the first rear mold insert 700 is completed, demolding and taking out the suction head product, so that the first rear mold insert 700 is continuously inserted into the first front mold core 200 to perform the first injection molding on the first rear mold insert 700, meanwhile, the second rear mold insert 2300 is inserted into the second front mold core 300 to perform the subsequent second injection molding operation on the second rear mold insert 2300 to form a complete suction head product, and after the second injection molding of the second rear mold insert 2300 is completed, demolding and taking out the suction head product; the process is carried out in a circulating way, so that the die and the processing time are fully utilized, and the production efficiency is improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. The utility model provides a double-colored mould structure of suction head, the suction head includes the main part and fixes the terminal portion of absorbing of main part, the portion of absorbing is provided with back-off structure, a serial communication port, include:

a front mold;

the first front mold core is arranged in the front mold;

the second front mold core is arranged in the front mold;

a first rear mold;

a second rear mold;

the first push cylinder is used for being arranged on the first rear die and enabling the first push cylinder to abut against one end of the first front die core, and the first push cylinder is also used for being arranged on the second rear die and enabling the first push cylinder to abut against one end of the second front die core;

the first rear mold insert is used for inserting the first push cylinder in a penetrating manner and inserting the first rear mold insert into the first front mold core, so that the first push cylinder, the first rear mold insert and the first front mold core are matched to form a main body part forming cavity, and the first rear mold insert is also used for inserting the first push cylinder in a penetrating manner and inserting the first rear mold insert into the second front mold core;

the movable insert is connected in the front mold in a sliding mode, one end of the movable insert abuts against the other end of the second front mold core, and when the first rear mold insert is inserted into the second front mold core, one end of the movable insert, the main body part and the second front mold core are matched to form a suction part forming cavity;

and the driving assembly is connected with the movable insert and is used for driving the movable insert to be close to or far away from the other end of the second front mold core.

2. The bicolour mold structure of a pipette tip of claim 1 wherein said removable insert is provided with a second locating hole for insertion of said first rear mold insert and positioning of said first rear mold insert.

3. The two-color mold structure of a suction head according to claim 1, further comprising a front mold positioning insert, wherein one end of the front mold positioning insert abuts against the other end of the first front mold core, the front mold positioning insert is provided with a first positioning hole, and the first positioning hole is used for inserting the first rear mold insert and positioning the first rear mold insert.

4. The two-color mold structure of a suction head according to claim 1, further comprising an attaching front mold insert, wherein one end of the attaching front mold insert abuts against the other end of the first front mold core, the attaching front mold insert is provided with a thin wall hole, the thin wall hole is used for the first rear mold insert to be inserted into, and the attaching front mold insert and the first front mold core are matched to form an attaching portion forming cavity, the end of the main body is provided with an attaching portion, and the suction portion is fixed on the attaching portion.

5. The structure of the bicolor mold for the suction head of claim 4, wherein the inner side wall of the thin-walled hole is provided with a fixing groove.

6. The two-color mold structure of a suction head according to claim 1, further comprising a front mold suction insert, wherein one end of the front mold suction insert abuts against the other end of the second front mold core, the other end of the front mold suction insert abuts against the one end of the movable insert, the front mold suction insert is provided with a suction hole, and when the first rear mold insert is inserted into the suction hole, the one end of the movable insert, the main body part and the front mold suction insert cooperate to form the suction part molding cavity.

7. The two-color mold structure of a suction head according to claim 1, further comprising a base, wherein the driving assembly comprises an elastic member, one end of the elastic member is connected to the movable insert, the other end of the elastic member is connected to the second front mold core, the elastic member is used for making the movable insert far away from the other end of the second front mold core, the front mold is movably connected to the base, and the base is used for abutting against the front mold and making the other end of the movable insert abut against the base, so that the one end of the movable insert is close to the other end of the second front mold core.

8. The dual-color mold structure of a pipette tip of claim 1 further comprising a first angled thermal nozzle disposed within said first front mold cavity, said first angled thermal nozzle communicating with said body cavity, said first angled thermal nozzle for injecting plastic into said body cavity.

9. The two-color mold structure of a pipette head of claim 6 further comprising a second angled thermal nozzle disposed within said front mold suction insert, said second angled thermal nozzle communicating with said pipette tip cavity, said second angled thermal nozzle for injection molding said pipette tip cavity.

10. The double-color mold structure of a suction head of claim 1, further comprising a second pusher and a second rear mold insert, wherein the second pusher is configured to be mounted on the first rear mold and abut the second pusher against the end of the first front mold core, and the second pusher is further configured to be mounted on the second rear mold and abut the second pusher against the end of the second front mold core; the second rear mould insert is used for inserting the second push cylinder in a penetrating manner and inserting the second rear mould insert into the first front mould core, so that the second push cylinder, the second rear mould insert and the first front mould core are matched to form a main body part forming cavity, the second rear mould insert is also used for inserting the second push cylinder in a penetrating manner and inserting the second rear mould insert into the second front mould core, and therefore the one end of the movable insert, the main body part and the second front mould core are matched to form the suction part forming cavity.

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