CN217144738U

CN217144738U - Plastic injection mold

Info

Publication number: CN217144738U
Application number: CN202221012172.7U
Authority: CN
Inventors: 纪昌斌; 柯贤明
Original assignee: Xiamen Chuncheng Industry And Trade Co ltd
Current assignee: Xiamen Chuncheng Industry And Trade Co ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-08-09
Anticipated expiration: 2032-04-28

Abstract

The application discloses a plastic injection mold, which comprises an upper mold and a lower mold, wherein an upper cavity is arranged on the upper mold, a lower cavity is arranged on the lower mold, the upper cavity and the lower cavity correspond to each other to form a molding mold cavity, a main runner is arranged on the lower mold, the lower cavity is positioned on the side edge of the main runner, a sub-runner communicated with the lower cavity is arranged on the main runner, a separation block is arranged on the main runner in a rotating and adjusting manner, a first groove horizontally penetrating through the separation block is formed in the separation block, and a second groove is formed in the separation block; when the separation block is adjusted to rotate until the first groove and the main flow channel are in the same straight line, the first groove is communicated with the main flow channel on two sides of the separation block; when the separating block is adjusted to rotate until the second groove and the main flow channel are in the same straight line, the second groove is communicated with the main flow channel on one side of the separating block. The application has the effect of being convenient for control injection moulding's quantity or the required shaping die cavity of control to mould plastics.

Description

Plastic injection mold

Technical Field

The application relates to the technical field of injection molds, in particular to a plastic injection mold.

Background

The plastic is an important organic synthetic polymer material, has light weight, firmness, no corrosion, easy molding into different shapes and wide application, and can be subjected to injection molding by using an injection mold in the production process of plastic products.

The injection mold mainly comprises an upper mold and a lower mold, wherein an upper cavity is arranged on the upper mold, a lower cavity is arranged on the lower mold, after the upper mold and the lower mold are closed, the upper cavity and the lower cavity form a complete molding cavity, a hot runner communicated with the molding cavity is arranged on one surface of the lower mold facing the upper mold, and an injection port communicated with the hot runner is arranged on the upper mold. During injection molding, plastic particles are melted into a fluid state and extruded into a hot runner through an injection molding opening, so that plastic in the fluid state enters a molding cavity, after the molding cavity is completely filled, the fluid state plastic is solidified, a plastic product is formed after the plastic is hardened, then the upper mold and the lower mold are opened, the plastic product is taken out, and the processing of the plastic product can be completed.

In order to improve the injection efficiency of the product, a plurality of upper cavities are generally disposed on an upper mold, and a plurality of lower cavities are generally disposed on a lower mold, so as to simultaneously inject a plurality of identical or different products. Since the hot runner and each molding cavity in the injection mold are communicated with each other, it is difficult to control the number of injection moldings each time or the molding cavity to be used each time during the process of filling each molding cavity with fluid plastic through the hot runner, and thus improvement is needed.

SUMMERY OF THE UTILITY MODEL

In order to facilitate control of the number of injection molding or control of the required molding cavities for injection molding, the application provides a plastic injection mold.

The application provides a plastics injection mold adopts following technical scheme:

a plastic injection mold comprises an upper mold and a lower mold, wherein an upper cavity is arranged on the upper mold, a lower cavity is arranged on the lower mold, the upper cavity and the lower cavity correspond to each other to form a molding mold cavity, a main runner is arranged on the lower mold, the lower cavity is positioned on the side edge of the main runner, a branch runner communicated with the lower cavity is arranged on the main runner, a separation block is arranged on the main runner in a rotating and adjusting manner, a first groove horizontally penetrating through the separation block is formed in the separation block, and a second groove is formed in the separation block; when the separation block is adjusted to rotate until the first groove and the main flow channel are in the same straight line, the first groove is communicated with the main flow channels on two sides of the separation block; when the separating block is adjusted to rotate until the second groove and the main flow channel are in the same straight line, the second groove is communicated with the main flow channel on one side of the separating block.

By adopting the technical scheme, the fluid plastic flows from the main runner to the molding die cavity formed by the upper die cavity and the lower die cavity through the sub-runner, and the plastic product is subjected to injection molding. The separating block can be used for controlling the flow direction of the fluid plastic, and when the separating block is rotated and adjusted to enable the first groove and the main flow channel to be in the same line, the main flow channels on the two sides of the separating block are communicated with each other, so that the fluid plastic can fill all the molding cavities to obtain plastic products of all the molding cavities on the injection mold; when the separating block rotates and is adjusted to the condition that the second groove and the main flow channel are in the same straight line, the second groove is communicated with the main flow channel on one side of the separating block, the main flow channel is divided into two sections positioned on two sides of the separating block, only one section of the main flow channel is provided with fluid plastics, the other section of the main flow channel is not provided with the fluid plastics to flow through, and the molding cavity on the side of the main flow channel, through which the fluid plastics do not flow, cannot be subjected to injection molding because no fluid plastics flow through, so that the injection molding effect of controlling the number of injection molding or controlling the needed molding cavities is realized.

Preferably, the separation block is vertically arranged in a cylindrical shape, a circular groove is formed in one surface, facing the upper die, of the lower die, and the separation block is embedded in the circular groove and is rotatably arranged in the circular groove.

Through adopting above-mentioned technical scheme, will separate the piece setting and be cylindricly to inlay and establish on the circular slot, can carry out the spacing of horizontal direction to separating the piece, improve the stability of separating the piece, and make things convenient for the rotation regulation of separating the piece.

Preferably, a locking member for fixing the rotating position of the partition block is arranged on the lower die.

By adopting the technical scheme, after the position of the separation block is adjusted by rotation, the separation block is fixed on the main flow channel by utilizing the locking piece, so that the separation block is kept stable when fluid plastic flows through the separation block, and the rotation adjustment of the separation block is realized.

Preferably, the locking member includes a bolt and a nut.

Through adopting above-mentioned technical scheme, the bolt and nut can fix the quick locking of spacer block on the lower mould, realize the quick rotation regulation to the spacer block.

Preferably, the first groove is located on the diameter of the separating block, a hexagonal groove is formed in the bottom of the first groove and located in the center line of the separating block, a nut of the bolt is embedded in the hexagonal groove, and the lower end of the bolt penetrates through the separating block and extends out of the lower die to be far away from the lower surface of the upper die.

Through adopting above-mentioned technical scheme, wear to establish the hexagon recess of partition block with the bolt and stretch out the lower surface that the mould was kept away from to the lower mould, the lower surface of mould was kept away from at the lower mould to nut and bolt spiro union because the nut of bolt inlays to be established in the hexagon recess, when needs rotate the regulation partition block, thereby can rotate the rotation that the bolt drove the partition block in the lower surface department of keeping away from the mould at the lower mould through unscrewing the nut, improves the convenience that the partition block rotated the regulation.

Preferably, the hexagonal groove is provided with a sealing ring, and the end face of the nut of the bolt facing the bottom of the hexagonal groove is tightly attached to the sealing ring.

Through adopting above-mentioned technical scheme, the sealing washer can prevent that fluid plastics from flowing down along the clearance between bolt and the hexagon recess to flow out the lower mould, reduce fluid plastics's waste.

Preferably, an injection molding opening is formed in the upper die, the lower end of the injection molding opening is located right above the separating block, one end of the second groove is communicated with the first groove, and the other end of the second groove extends to the outer peripheral side of the separating block.

Through adopting above-mentioned technical scheme, because the lower extreme of the mouth of moulding plastics is located and separates the piece directly over, flow down from the mouth of moulding plastics as fluid plastics, and the both ends of first recess rotate to the circular slot inboard of orientation, when second recess and one of them sprue intercommunication, although second recess one end and first recess intercommunication this moment, nevertheless because first recess both ends receive the inboard blockking of circular slot, consequently fluid plastics follow one end of second recess flow direction and the one section sprue of second recess intercommunication, and then the control is adjusted the partition of sprue.

Preferably, the sprue is the bar form, just the equal interval in sprue length direction's both sides is provided with a plurality of die cavities down, go up the equal interval on the mould and be provided with a plurality of die cavities of going up that correspond each other with die cavity down.

Through adopting above-mentioned technical scheme, the shaping die cavity can evenly be arranged in sprue length direction's both sides.

In summary, the present application includes at least one of the following beneficial technical effects:

(1) the flow direction of the fluid plastic is controlled through the matching of the main runner and the first groove and the second groove on the separating block, so that the quantity of injection molding is controlled or a required molding cavity is controlled for injection molding;

(2) the quick rotation adjustment of the separation block on the main flow passage is realized through a locking piece consisting of a bolt and a nut.

Drawings

FIG. 1 is a schematic structural view of a plastic injection mold according to the present embodiment;

FIG. 2 is a schematic structural view of the lower mold of the present embodiment;

FIG. 3 is a schematic structural view of the upper mold of the present embodiment;

FIG. 4 is an exploded view of the lower mold of the present embodiment;

FIG. 5 is an exploded view of the connection structure of the partition block of the present embodiment;

fig. 6 is a sectional view taken along a-a of fig. 2.

Reference numerals: 1. an upper die; 2. a lower die; 3. an upper cavity; 4. a lower cavity; 5. a main flow channel; 51. a first flow passage; 52. a second flow passage; 6. a shunt channel; 7. a separation block; 8. a circular groove; 9. an injection molding port; 10. a first groove; 11. a second groove; 12. a bolt; 13. a nut; 14. a hexagonal groove; 15. and (5) sealing rings.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a plastic injection mold. Referring to fig. 1, the plastic injection mold includes an upper mold 1 and a lower mold 2.

Referring to fig. 2 and 3, a plurality of upper cavities 3 are formed in the upper die 1, a plurality of lower cavities 4 are formed in the lower die 2, and the upper cavities 3 and the lower cavities 4 correspond to each other to form a molding cavity. Seted up sprue 5 on lower mould 2, sprue 5 is the bar form, and sprue 5 is located 2 long limit direction's of lower mould central line position, and the both ends of sprue 5 extend to the position that is close to 2 both ends of lower mould, and lower die cavity 4 intervals set up the both sides at 5 length direction of sprue.

The main runner 5 is provided with the sub-runners 6, the sub-runners 6 are positioned on two sides of the main runner 5, one end of the sub-runner 6 is communicated with the molding die cavity, and the other end of the sub-runner 6 is communicated with the main runner 5, so that the fluid plastic enters the molding die cavity from the main runner 5 after passing through the sub-runners 6.

Referring to fig. 1 and 2, the main runner 5 is rotatably adjusted and provided with a separation block 7, the separation block 7 is vertically arranged in a cylindrical shape, a circular groove 8 is formed in one surface of the lower die 2 facing the upper die 1, and the separation block 7 is embedded in the circular groove 8 and rotatably arranged. The partition block 7 is located at a position near the middle of the main flow passage 5, thereby equally dividing the main flow passage 5 into the first flow passage 51 and the second flow passage 52 located at both sides of the partition block 7. An injection port 9 is arranged on the upper die 1, and the lower end of the injection port 9 is positioned right above the separating block 7.

Referring to fig. 4 and 5, the separating block 7 is provided with a first groove 10 horizontally penetrating through the separating block 7, the first groove 10 is located on the diameter of the separating block 7, the separating block 7 is further provided with a second groove 11, the second groove 11 is perpendicular to the first groove 10 and is communicated with the first groove 10, the joint is located at the middle position of the separating block 7, one end of the second groove 11 is connected with the middle position of the separating block 7, and the other end extends to the outer peripheral side of the separating block 7.

Referring to fig. 4 and 5, when the fluid plastic flows down to the separating block 7 from the injection port 9, when the separating block 7 rotates and is adjusted to make the first groove 10 and the main runner 5 in the same straight line, at this time, one end of the second groove 11 faces the inner wall of the circular groove 8 and is blocked by the inner wall of the circular groove 8, and the main runners 5 on both sides of the separating block 7 are communicated with each other, so that the fluid plastic can fill all the molding cavities through the main runners 5, and a plastic product of all the molding cavities on the injection mold is obtained.

When the separating block 7 is adjusted to rotate until the second groove 11 and the main runner 5 are in the same straight line, at this time, two ends of the first groove 10 face the inner wall of the circular groove 8 and are blocked by the inner wall of the circular groove 8, the second groove 11 can be selected to be communicated with the first runner 51 or the second runner 52 according to requirements, then the fluid plastic flows to the main runner 5 communicated with the second groove 11, the flow direction of the fluid is adjusted through rotation of the separating block 7, and therefore the number of injection molding is controlled or the required molding cavities are controlled to perform injection molding.

Referring to fig. 5 and 6, the lower mold 2 is provided with a locking member for fixing the rotational position of the spacer 7, and when the spacer 7 is rotated to an adjusted position, the locking member can fix the spacer 7 to the lower mold 2 so that the spacer 7 is stabilized. Specifically, the retaining member includes bolt 12 and nut 13, hexagonal groove 14 has been seted up in first recess 10 bottom and the position that is located spacer block 7 axis, place elastic sealing washer 15 in hexagonal groove 14, bolt 12 passes spacer block 7 and lower mould 2 from 5 one side of sprue, and stretch out lower mould 2 and keep away from the lower surface of last mould 1, bolt 12's nut is closely laminated with sealing washer 15 towards the terminal surface of hexagonal groove 14 bottom, bolt 12's nut inlays and locates in hexagonal groove 14, nut 13 and bolt 12 spiro union are at the lower surface of last mould 1 of 2 keeping away from of lower mould, the realization is fixed with the locking of lower mould 2 to spacer block 7.

When the separation block 7 needs to be adjusted in a rotating mode, the nut 13 can be unscrewed, the bolt 12 is rotated at the lower surface, away from the upper die 1, of the lower die 2, and the bolt 12 is embedded in the hexagonal groove 14 of the separation block 7, so that the separation block 7 can be driven to rotate when the bolt 12 is rotated, and the effect of adjusting the separation block 7 in a rapid rotating mode is achieved. In addition, the sealing ring 15 can prevent the fluid plastic from flowing out of the lower die 2 along the gap between the bolt 12 and the hexagonal groove 14, and waste of the fluid plastic is reduced.

The implementation principle of the plastic injection mold provided by the embodiment of the application is as follows: when the fluid plastic flows from the main runner 5 to the molding cavities formed by the upper cavity 3 and the lower cavity 4 through the sub-runners 6, the flow direction of the fluid plastic is controlled by the dividing block 7, and when the dividing block 7 is rotationally adjusted to enable the first groove 10 and the main runner 5 to be in the same line, the fluid plastic flows to each molding cavity on the main runner 5; when the separating block 7 is adjusted to rotate until the second groove 11 and the main runner 5 are in the same straight line, the fluid plastic flows to the main runner 5 communicated with the second groove 11, and the effect of controlling the number of injection molding or controlling the needed molding cavities to perform injection molding is achieved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A plastic injection mold comprises an upper mold (1) and a lower mold (2), wherein an upper cavity (3) is arranged on the upper mold (1), a lower cavity (4) is arranged on the lower mold (2), the upper cavity (3) and the lower cavity (4) correspond to each other to form a molding cavity, a main runner (5) is arranged on the lower mold (2), and the plastic injection mold is characterized in that the lower cavity (4) is positioned on the side edge of the main runner (5), a sub-runner (6) communicated with the lower cavity (4) is arranged on the main runner (5), a separation block (7) is arranged on the main runner (5) in a rotating and adjusting manner, a first groove (10) horizontally penetrating through the separation block (7) is formed on the separation block (7), and a second groove (11) is formed on the separation block (7);

when the separation block (7) is adjusted to rotate until the first groove (10) and the main flow channel (5) are in the same straight line, the first groove (10) is communicated with the main flow channel (5) on two sides of the separation block (7); when the separation block (7) is adjusted in a rotating mode until the second groove (11) and the main flow channel (5) are in the same straight line, the second groove (11) is communicated with the main flow channel (5) on one side of the separation block (7).

2. A plastic injection mold according to claim 1, wherein the separating block (7) is in a vertically arranged cylindrical shape, a circular groove (8) is provided on a side of the lower mold (2) facing the upper mold (1), and the separating block (7) is embedded and rotatably disposed in the circular groove (8).

3. A plastic injection mould according to claim 2, characterized in that the lower mould (2) is provided with locking means for fixing the rotational position of the spacer (7).

4. A plastic injection mould according to claim 3, characterized in that the locking member comprises a bolt (12) and a nut (13).

5. A plastic injection mould according to claim 4, characterized in that the first recess (10) is located on the diameter of the spacer block (7), a hexagonal recess (14) is provided at the bottom of the first recess (10) and at the position of the centre line of the spacer block (7), the cap of the bolt (12) is embedded in the hexagonal recess (14), and the lower end of the bolt (12) passes through the spacer block (7) and protrudes out of the lower surface of the lower mould (2) away from the upper mould (1).

6. A plastic injection mould according to claim 5, characterized in that the hexagonal recess (14) is provided with a sealing ring (15), and the end surface of the nut of the bolt (12) facing the bottom of the hexagonal recess (14) is in close contact with the sealing ring (15).

7. A plastic injection mold according to claim 2, characterized in that the upper mold (1) is provided with an injection port (9), the lower end of the injection port (9) is located right above the partition block (7), one end of the second groove (11) is communicated with the first groove (10), and the other end extends to the outer periphery side of the partition block (7).

8. A plastic injection mold according to claim 1, characterized in that the main runner (5) is strip-shaped, and both sides of the main runner (5) in the length direction are provided with a plurality of lower cavities (4) at intervals, and the upper mold (1) is provided with a plurality of upper cavities (3) at intervals, which correspond to the lower cavities (4).