CN209903810U - Cut off side runner structure and injection mold in mould - Google Patents

Abstract

The utility model discloses a cut off side runner structure and injection mold in mould belongs to the mould field. The in-mold cutting side gate structure comprises an upper mold core, an upper mold plate for fixing the upper mold core, a lower mold core and a lower mold plate for fixing the lower mold core, wherein the upper mold core and the lower mold core are matched to form a mold cavity for forming a product and a runner cavity for forming a runner, the mold cavity is communicated with the runner cavity, an upper mold insert and a lower mold insert are arranged at the joint of the mold cavity and the runner cavity, and the bottom end of the upper mold insert is matched with the top end of the lower mold insert to form a side gate; one side of the lower die insert towards the product is provided with a first ejector rod, the top end of the first ejector rod is provided with a shear port, a shear cavity is arranged at the position, opposite to the first ejector rod, in the upper die insert, and when the first ejector rod moves upwards, the shear port is matched with the shear cavity and used for cutting off a side sprue. The utility model discloses can realize cutting off of side runner in the mould, ensure product size and outward appearance, improve production efficiency simultaneously, alleviate intensity of labour.

Description

Cut off side runner structure and injection mold in mould

Technical Field

The utility model relates to the field of molds, especially, relate to a cut off side runner structure and injection mold in mould.

Background

In industrial production, a mold is one of the most important production equipments. In the process of moulding plastics, need control the volume of injecting into the material at every turn, in addition, the product all carries out the demolding simultaneously with the runner usually, and the runner that persists on with the product through subsequent cutting process is amputated again, has so both increased the cost, has reduced work efficiency again, and simultaneously, subsequent cutting work may cause the deformation of product or even damage to influence product quality.

SUMMERY OF THE UTILITY MODEL

Based on above, an object of the utility model is to provide a cut off side runner structure and injection mold in mould can realize cutting off of side runner in the mould, ensures product size and outward appearance, improves production efficiency simultaneously, alleviates intensity of labour.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a cut off side runner structure in mould, including the upper die core, be used for fixing the cope match-plate pattern, lower die core and the lower bolster that is used for fixing the lower die core of upper die core, the upper die core with the cooperation of lower die core forms the die cavity that is used for the shaping product and is used for the runner chamber of shaping runner, the die cavity with the runner chamber intercommunication, the die cavity with the runner chamber junction is provided with the upper die insert and lower mould insert, the bottom of upper die insert with the top cooperation of lower mould insert forms the side runner; one side of the lower die insert towards a product is provided with a first ejector rod, the top end of the first ejector rod is provided with a shearing opening, a shearing cavity is arranged in the position, opposite to the first ejector rod, of the upper die insert, and when the first ejector rod moves upwards, the shearing opening is matched with the shearing cavity and used for cutting off the side gate.

Further, a first inclined plane is arranged on the shearing opening, a second inclined plane is arranged in the shearing cavity, and when the first ejector rod moves upwards, the first inclined plane is matched with the second inclined plane and used for cutting off the side gate.

Further, the cutting opening is U-shaped and comprises two separating parts positioned at two ends and a containing groove arranged between the two separating parts.

Furthermore, a baffle is further installed on one side, close to the product, of the upper die insert, the baffle is located above the first ejector rod, and the baffle and the upper die insert jointly form the shearing cavity.

Further, the lower die comprises a first top plate, the first top plate is arranged below the lower die plate, the first top plate can move relative to the lower die plate along the longitudinal direction, and the first ejector rod is fixedly arranged on the first top plate.

The lower die plate is characterized by further comprising a second top plate, the second top plate is arranged between the first top plate and the lower die plate, and a plurality of ejector pins for ejecting products and pouring channels are fixedly connected to the second top plate.

Further, the second top plate is connected with the lower template through an elastic element.

Further, still include the runner cover, run through in the runner cover and be provided with the injection chamber, the injection chamber with the runner chamber intercommunication.

Furthermore, the number of the die cavities is four, and the four die cavities are distributed in a rectangular array.

The utility model also provides an injection mold, include as above-mentioned any technical scheme cut off side runner structure in the mould.

The utility model has the advantages that: through the cooperation of the first ejector rod and the shearing cavity, the side sprue is cut off in the die, so that the size and the appearance of the product are ensured, the quality of the product is improved, the production efficiency of the product is improved, the labor intensity is reduced, the structure is simple, and the controllability is good.

Drawings

Fig. 1 is a schematic structural diagram of an in-mold cutting side gate structure according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an upper mold core provided in an embodiment of the present invention;

fig. 3 is a schematic structural view of a lower mold core provided in an embodiment of the present invention;

FIG. 4 is a first cross-sectional view of a cut-in-mold side gate structure provided in an embodiment of the present invention;

FIG. 5 is an enlarged view at A in FIG. 4;

fig. 6 is a schematic structural view of an upper die insert provided in an embodiment of the present invention;

fig. 7 is a schematic structural view of a lower die insert provided in an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a first carrier rod according to an embodiment of the present invention;

fig. 9 is an assembly schematic view of the lower mold core, the upper mold insert, the lower mold insert, the baffle, and the first carrier rod provided in the embodiment of the present invention;

FIG. 10 is a second cross-sectional view of a cut-in-mold side gate structure provided in an embodiment of the present invention;

FIG. 11 is an enlarged view at B in FIG. 10;

fig. 12 is a cross-sectional view of a sprue bushing provided in an embodiment of the present invention.

In the figure:

1, mounting a mold core; 101-an upper mold cavity; 102-an up-runner cavity;

2, mounting a template;

3, lower mold core; 301-lower mold cavity; 302-lower runner cavity; 303-top piece aperture;

4-a lower template;

5, an upper die insert; 51-upper gate trough; 52-a shear chamber; 521-a second bevel; 53-baffles;

6-a lower die insert; 61-lower gate trough; 62-a first ejector pin slot;

7-a first ejector rod; 71-a shear port; 711-separation section; 712-a receiving groove; 713-first bevel;

8-a first top panel;

9-a second top panel;

10-a stripper needle;

11-a sprue bush; 111-an implantation chamber; 112-arc opening;

100-a mold cavity; 200-a runner cavity; 300-side gate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

As shown in fig. 1 to 12, the present embodiment provides an in-mold cutting-off side gate structure including an upper core 1, an upper mold plate 2 for fixing the upper core 1, a lower core 3, and a lower mold plate 4 for fixing the lower core 3. The upper die core 1 is provided with an upper die cavity 101 and an upper pouring cavity 102, the lower die core 3 is provided with a lower die cavity 301 and a lower pouring cavity 302, the upper die core 1 and the lower die core 3 are matched to form a die cavity 100 for forming a product and a pouring cavity 200 for forming a pouring gate, and the die cavity 100 is communicated with the pouring cavity 200, so that an injection molding material can flow into the die cavity 100 through the pouring cavity 200.

An upper die insert 5 and a lower die insert 6 are arranged at the joint of the die cavity 100 and the runner cavity 200, the upper die insert 5 is embedded in the upper die core 1, and the lower die insert 6 is embedded in the lower die core 3. Specifically, the bottom end of the upper die insert 5 is provided with an upper side gate groove 51, and correspondingly, the top end of the lower die insert 6 is provided with a lower side gate groove 61 in a matching manner. When the upper core 1 and the lower core 3 are clamped, the bottom surface of the upper die insert 5 abuts the top surface of the lower die insert 6, and the upper gate groove 51 and the lower gate groove 61 surround and form the side gates 300.

In order to realize the cutting of the side gate 300 from the product, in the present embodiment, the in-mold cutting side gate structure includes a first ejector pin 7 for pushing the side gate 300 upward, thereby cutting the side gate 300. Specifically, one side of the lower die insert 6 facing the product is longitudinally provided with a first ejector pin groove 62, and the first ejector pin 7 can move into the side gate 300 along the first ejector pin groove 62. Preferably, the top end of the first carrier rod 7 is provided with a cutout 71. In the present embodiment, the cutout 71 preferably has a U-shaped cross section in a direction perpendicular to the side gate 300, and includes two separated portions 711 at both ends and an accommodation groove 712 provided between the two separated portions 711. Since the position of the side gate 300 corresponding to the two separating portions 711 is small in size, the cutting is more labor-saving, and the accommodating groove 712 can drive the side gate 300 to move, so that the side gate 300 is completely separated from the product.

In order to realize the cutting of the side gate 300 and avoid the first ejector pin 7 from jacking up the upper mold core 1 when cutting the side gate 300, thereby affecting the pressure maintaining effect, in the present embodiment, a shearing cavity 52 is preferably provided in the upper mold insert 5. Specifically, the upper die insert 5 is provided with a shearing cavity 52 at a position opposite to the first ejector pin 7, the bottom of the upper die insert 5 is provided with the shearing cavity 52, the first ejector pin 7 can move into the shearing cavity 52 along the first ejector pin groove 62, the outer surface of the shearing cavity 52 is matched with the first ejector pin 7, and shearing force is applied to the side gate 300, so that the effect of cutting off the side gate 300 is realized. Further preferably, a baffle 53 is further installed on one side, close to the product, of the upper die insert 5, the baffle 53 is located above the first ejector pin 7, and the baffle 53 and the upper die insert 5 together form a closed shearing cavity 52, so that the situation that the position of the first ejector pin 7 after entering the shearing cavity 52 is deviated due to the large size of the shearing cavity 52, and the cutting effect of the side gate 300 is affected is avoided.

It is further preferable that the shear aperture 71 is provided with a first inclined surface 713, and correspondingly, a second inclined surface 521 is provided in the shear cavity 52 in parallel with the first inclined surface 713, when the first ejector pin 7 moves upward, the first inclined surface 713 and the second inclined surface 521 cooperate to apply an oblique shearing force to the side gate 300, so that the side gate 300 is cut more easily.

In this embodiment, the number of the cavities 100 is 4, the 4 cavities 100 are distributed in a rectangular array, the runner cavity 200 includes a main runner cavity and 4 branch runner cavities which are communicated, each branch runner cavity corresponds to and is communicated with each cavity 100, an upper die insert 5 and a lower die insert 6 are arranged at the joint of each cavity 100 and each branch runner cavity, and correspondingly, each lower die insert 6 is provided with a first ejector rod 7.

In order to simultaneously move the 4 first ejector pins 7 upwards and cut the 4 side gates 300, the internal cutting side gate structure preferably further comprises a first top plate 8, and the first ejector pins 7 are fixedly arranged on the first top plate 8. Specifically, first roof 8 sets up in the below of lower bolster 4, can link firmly many guide posts on the lower bolster 4, has seted up a plurality of guiding holes on the first roof 8 correspondingly, makes first roof 8 can overlap and establish on the guide post to realize that first roof 8 moves along vertical relative lower bolster 4. Of course, the connection mode of the first top board 8 and the lower template 4 is not limited to the above structure, and may also be other structures that can realize the movement of the first top board 8 relative to the lower template 4 along the longitudinal direction, and no further description is given here.

In order to realize the ejection of the product, a second top plate 9 is preferably further arranged between the first top plate 8 and the lower template 4, and a plurality of ejector pins 10 for ejecting the product and the pouring channel are fixedly connected to the second top plate 9. Specifically, a plurality of positions on the lower die core 3 corresponding to the edge of the die cavity 100 and the pouring cavity 200 are provided with a plurality of ejecting holes 303 in a penetrating manner, and a plurality of ejecting needles 10 and a plurality of ejecting holes 303 are arranged in a one-to-one correspondence manner, so that when the second top plate 9 moves upwards, the ejecting needles 10 are driven to move upwards along the ejecting holes 303, the ejection of a product and the pouring channel is realized, the operation is convenient, and the safety is high.

Optionally, the second top plate 9 is connected with the lower template 4 through an elastic element, so that the second top plate 9 is prevented from colliding with the lower template 4 and being damaged.

In this embodiment, optionally, a sprue bush 11 is sleeved at the middle position of the upper die plate 2. Specifically, as shown in fig. 12, an injection cavity 111 is provided through the sprue bush 11, and the injection cavity 111 communicates with the sprue cavity 200. The arcuate opening 112 in the upper portion of the sprue bushing 11 cooperates with a nozzle of an injection molding machine to enable the injection molding material to smoothly enter the sprue cavity 200 along the sprue cavity 111.

This embodiment still provides an injection mold, and this injection mold includes that foretell mould cuts off side sprue structure in, still includes cope match-plate pattern and lower mould bedplate, and wherein, cope match-plate pattern sets firmly in 2 tops of cope match-plate pattern, and the lower mould bedplate sets up in 8 below first roofs. The lower die base plate is fixed on a movable die plate of the injection molding machine, a round hole is further formed in the middle of the lower die base plate, and an ejector rod of the injection molding machine can enter from the round hole to push the first top plate 8 to move upwards.

The working principle of the utility model is as follows: after the injection mold finishes injection molding and pressure maintaining, before mold opening, a top rod of the injection molding machine pushes the first top plate 8 to move upwards, so that the first top rod 7 is driven to cut off the side gate 300 which is still at high temperature; when the product is cooled to the ejection temperature, after the upper mold core 1 and the lower mold core 3 are separated, the ejector rod of the injection molding machine continuously pushes the first ejector plate 8, so that the second ejector plate 9 and the ejector pin 10 are pushed to move upwards, and the ejector pin 10 ejects the product and the pouring channel.

The utility model discloses can cut off side runner 300 before the die sinking easily to ensure the size and the outward appearance of product, improved the quality of product, improved production efficiency simultaneously, alleviateed intensity of labour, and simple structure, the controllability is good.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. The utility model provides a cut off side runner structure in mould, includes last mold core (1), is used for fixing go up cope match-plate pattern (2), lower mold core (3) of mold core (1) and be used for fixing lower template (4) of mold core (3) down, go up mold core (1) with lower mold core (3) cooperation forms die cavity (100) that are used for the shaping product and is used for the shaping to water chamber (200) of watering, die cavity (100) with water chamber (200) intercommunication, its characterized in that: an upper die insert (5) and a lower die insert (6) are arranged at the joint of the die cavity (100) and the runner cavity (200), and the bottom end of the upper die insert (5) is matched with the top end of the lower die insert (6) to form a side sprue (300); one side of the lower die insert (6) facing a product is provided with a first ejector rod (7), the top end of the first ejector rod (7) is provided with a shear opening (71), a position, opposite to the first ejector rod (7), in the upper die insert (5) is provided with a shear cavity (52), and when the first ejector rod (7) moves upwards, the shear opening (71) is matched with the shear cavity (52) and used for cutting off the side gate (300).

2. The in-mold cutting-off side gate structure according to claim 1, wherein a first inclined surface (713) is provided on the shear port (71), a second inclined surface (521) is provided in the shear cavity (52), and the first inclined surface (713) is matched with the second inclined surface (521).

3. The in-mold cutting-off-side gate structure according to claim 1, wherein the cutout (71) is U-shaped, and includes two separated portions (711) at both ends and a receiving groove (712) provided between the two separated portions (711).

4. The in-mold cutting-off side gate structure according to claim 1, wherein a baffle (53) is further installed on one side of the upper mold insert (5) close to the product, the baffle (53) is located above the first ejector pin (7), and the baffle (53) and the upper mold insert (5) form the shearing cavity (52) together.

5. The in-mold cutting-off side gate structure according to claim 1, further comprising a first top plate (8), wherein the first top plate (8) is disposed below the lower mold plate (4), the first top plate (8) is capable of moving relative to the lower mold plate (4) along a longitudinal direction, and the first ejector pin (7) is fixed on the first top plate (8).

6. The in-mold cutting-off side gate structure according to claim 5, further comprising a second top plate (9), wherein the second top plate (9) is arranged between the first top plate (8) and the lower mold plate (4), and a plurality of ejector pins (10) for ejecting products and pouring channels are fixedly connected to the second top plate (9).

7. The in-mold cutting-off side gate structure according to claim 6, wherein the second top plate (9) and the lower mold plate (4) are connected by an elastic member.

8. The in-mold shut-off side gate structure according to claim 1, further comprising a gate sleeve (11), an injection cavity (111) being disposed through the gate sleeve (11), the injection cavity (111) communicating with the runner cavity (200).

9. The in-mold cutoff side gate structure according to claim 1, wherein there are four mold cavities (100), four of the mold cavities (100) being arranged in a rectangular array.

10. An injection mold comprising the in-mold cutting-off-side gate structure according to any one of claims 1 to 9.

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