Preform injection mold with enhanced explosion-proof mold cavity water channel structure

Abstract

The utility model belongs to the field of mold technology, and particularly relates to a preform injection mold with an enhanced explosion-proof mold cavity water channel structure. The utility model comprises an injection lower mold and an injection upper mold. In the injection molding process of the utility model, the molten material is diverted by the injection diverter and then injected into the cavity between the preform molding lower cylinder, the preform molding middle cylinder and the preform molding upper cylinder and the preform molding auxiliary parts through the explosion-proof injection molding cooling component. The preform molding auxiliary parts are used to assist in molding the inner structure of the preform plastic part. After the injection molding is completed, the cooling water is first introduced into the explosion-proof injection molding cooling component, and the injection port of the plastic part is first cooled by the explosion-proof injection molding cooling component, and then the cooling water is introduced into the cooling part outside the preform. The higher temperature injection port is first cooled, and then the entire outer surface of the preform plastic part is cooled in a cold zone. This can avoid excessive cooling temperature difference of the plastic part and the occurrence of bursting, and can strengthen the overall structural strength of the preform and improve the yield rate.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a bottle embryo injection mold with an enhanced explosion-proof mold cavity water channel structure. Background Art

[0002] The preform is the prototype before the bottle body is formed. The preform is generally formed with a hot runner mold. After the injection molding is completed, the existing preform mold is generally cooled by a straight-through water cooling structure. During cooling, due to the long preform, the temperature difference between the bottle mouth and the bottle body is large. The straight-through water cooling cannot control the cooling temperature difference at each position, which will cause the preform plastic parts to burst, resulting in a relatively average yield of the finished product. Therefore, it is urgent to design a preform injection mold with an enhanced explosion-proof mold cavity water channel structure that can overcome the above defects.

[0003] In order to overcome the shortcomings of the prior art, people have proposed various solutions through continuous exploration. For example, a Chinese patent discloses a PET bottle embryo mold [application number: 202210871299.2]. By setting a fixed template, a movable template, a No. 1 positioning block, a core, a No. 1 groove, a No. 1 fixed plate, a No. 2 fixed plate, a No. 3 fixed plate, a guide ring, a cavity, and a spring, the movable template moves toward the fixed template to close the mold. After the core enters the guide ring, the No. 1 positioning block immediately reaches the guide ring. When the outer wall of the No. 1 positioning block encounters the inner wall of the guide ring, it will push the inner wall of the guide ring, so that the inner wall of the guide ring is fitted with the outer wall of the No. 1 positioning block, so that the No. 1 positioning block and the guide ring are at the same center, the core and the No. 1 guide ring are at the same center, and the cavity and the guide ring are at the same center. Utility Model Content

[0004] The utility model aims to solve the above problems and provides a preform injection mold with an enhanced explosion-proof mold cavity water channel structure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A preform injection mold with an enhanced explosion-proof mold cavity water channel structure comprises an injection lower mold and an injection upper mold, an injection diverter is arranged above the injection upper mold, a preform molding lower cylinder, a preform molding middle cylinder and a preform molding upper cylinder are arranged between the injection lower mold and the injection upper mold, an explosion-proof injection molding cooling component is arranged on the top of the preform molding upper cylinder, the explosion-proof injection molding cooling component is snap-fitted with the preform molding upper cylinder, a preform outer cooling part is arranged on the outer side of the preform molding upper cylinder, and a preform molding auxiliary part is sleeved inside the preform molding lower cylinder, the preform molding middle cylinder and the preform molding upper cylinder.

[0007] In the above-mentioned preform injection mold with an enhanced explosion-proof mold cavity water channel structure, the explosion-proof injection cooling assembly includes an injection alignment sleeve arranged on the top of the preform molding upper cylinder, and a semi-open cooling groove is provided on the outside of the injection alignment sleeve, and a connecting groove connected to the cooling part on the outside of the preform is provided at the bottom of the semi-open cooling groove.

[0008] In the above-mentioned preform injection mold with the enhanced explosion-proof mold cavity water channel structure, an injection port penetrating through the injection alignment sleeve is provided in the injection alignment sleeve.

[0009] In the above-mentioned preform injection mold with an enhanced explosion-proof mold cavity water channel structure, the preform outer cooling part includes a preform injection cooling channel arranged on the outer side of the preform molding upper cylinder, the preform injection cooling channel is spiral, and the preform injection cooling channel is connected to the connecting groove.

[0010] In the above-mentioned preform injection mold with enhanced explosion-proof mold cavity water channel structure, a water inlet is provided in the injection upper mold, and the water inlet is connected to the semi-open cooling groove.

[0011] In the above-mentioned preform injection mold with enhanced explosion-proof mold cavity water channel structure, a water outlet is also provided in the injection upper mold, the water outlet is connected to the bottom of the preform injection cooling channel, and the water inlet and the water outlet are parallel to each other.

[0012] In the above-mentioned preform injection mold with enhanced explosion-proof mold cavity water channel structure, the preform molding auxiliary component includes a preform inner side molding rod body arranged inside the preform molding lower cylinder, the preform molding middle cylinder and the preform molding upper cylinder.

[0013] In the above-mentioned preform injection mold with enhanced explosion-proof mold cavity water channel structure, the injection diverter includes an injection main board, an injection diverter plate and an injection nozzle arranged above the injection upper mold, and the injection nozzle extends into the injection port.

[0014] In the above-mentioned preform injection mold with enhanced explosion-proof mold cavity water channel structure, a fixed sleeve plate is provided between the injection main plate and the injection upper mold, and the injection diverter plate is clamped with the fixed sleeve plate.

[0015] In the above-mentioned preform injection mold with enhanced explosion-proof mold cavity water channel structure, a sealing sleeve is provided between the preform molding lower cylinder and the preform molding middle cylinder, and the preform molding lower cylinder and the preform molding middle cylinder are respectively engaged with the sealing sleeves.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] In the injection molding process, the utility model brings the preform molding lower cylinder, the preform molding middle cylinder and the preform molding upper cylinder closer to each other, and the molten material is diverted by the injection molding diverter and then injected into the cavity between the preform molding lower cylinder, the preform molding middle cylinder and the preform molding upper cylinder and the preform molding auxiliary parts through the explosion-proof injection molding cooling component. The preform molding auxiliary parts are used to assist in molding the inner structure of the preform plastic part. After the injection molding is completed, the cooling water is first introduced into the explosion-proof injection molding cooling component, and the injection port of the plastic part is first cooled by the explosion-proof injection molding cooling component, and then the cooling water is introduced into the cooling part outside the preform. The injection port with a higher temperature is first cooled, and then the entire outer surface of the preform plastic part is cooled in a cold zone, so that the plastic part can be prevented from bursting due to excessive cooling temperature difference, and the overall structural strength of the preform can be strengthened to improve the yield rate.

[0018] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a partial structural schematic diagram of the utility model.

[0021] Figure 3 It is a top view of the utility model.

[0022] Figure 4 yes Figure 3 Schematic diagram of the cross section at AA in the middle.

[0023] In the figure: injection lower mold 1, injection upper mold 2, injection diverter 3, preform molding lower cylinder 4, preform molding middle cylinder 5, preform molding upper cylinder 6, explosion-proof injection cooling assembly 7, preform outer cooling part 8, preform molding auxiliary part 9, injection alignment sleeve 10, semi-open cooling groove 11, connecting groove 12, injection port 13, preform injection cooling channel 14, water inlet 15, water outlet 16, preform inner side molding rod 17, injection main board 18, fixed sleeve 21, sealing sleeve 22. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings.

[0025] like Figure 1-4As shown, a preform injection mold with an enhanced explosion-proof mold cavity water channel structure comprises an injection lower mold 1 and an injection upper mold 2, an injection diverter 3 is arranged above the injection upper mold 2, a preform molding lower cylinder 4, a preform molding middle cylinder 5 and a preform molding upper cylinder 6 are arranged between the injection lower mold 1 and the injection upper mold 2, an explosion-proof injection molding cooling component 7 is arranged on the top of the preform molding upper cylinder 6, the explosion-proof injection molding cooling component 7 is snap-fitted with the preform molding upper cylinder 6, a preform outer cooling part 8 is arranged on the outer side of the preform molding upper cylinder 6, and a preform molding auxiliary part 9 is sleeved inside the preform molding lower cylinder 4, the preform molding middle cylinder 5 and the preform molding upper cylinder 6.

[0026] In this embodiment, during the injection molding process, the preform molding lower cylinder 4, the preform molding middle cylinder 5 and the preform molding upper cylinder 6 are brought close to each other, and the molten material is diverted by the injection molding diverter 3 and then injected into the cavity between the preform molding lower cylinder 4, the preform molding middle cylinder 5 and the preform molding upper cylinder 6 and the preform molding auxiliary component 9 through the explosion-proof injection molding cooling component 7. The preform molding auxiliary component 9 is used to assist in molding the inner structure of the preform plastic part. After the injection molding is completed, the cooling water is first introduced into the explosion-proof injection molding cooling component 7, and the injection port of the plastic part is first cooled by the explosion-proof injection molding cooling component 7, and then the cooling water is introduced into the outer cooling part 8 of the preform. The injection port with a higher temperature is first cooled, and then the outer surface of the preform plastic part is cooled in a cold zone, so as to avoid excessive cooling temperature difference of the plastic part and the occurrence of bursting, strengthen the overall structural strength of the preform, and improve the yield rate.

[0027] Combination Figure 1-4 As shown, the explosion-proof injection molding cooling assembly 7 includes an injection molding alignment sleeve 10 arranged on the top of the preform molding upper cylinder 6, a semi-open cooling groove 11 is provided on the outside of the injection molding alignment sleeve 10, a connecting groove 12 connected to the outer cooling part 8 of the preform is provided at the bottom of the semi-open cooling groove 11, and an injection port 13 passing through the injection molding alignment sleeve 10 is provided in the injection molding alignment sleeve 10.

[0028] Specifically, during the injection molding process, the molten material is injected into the mold cavity through the injection port 13 of the injection molding alignment sleeve 10. After the injection molding is completed, the cooling water is introduced into the semi-open cooling groove 11, and the injection port on the outside of the plastic part is cooled, and then flows into the cooling part 8 on the outside of the bottle embryo through the connecting groove 12.

[0029] Combination Figure 2 , Figure 4 As shown, the preform outer cooling portion 8 includes a preform injection cooling channel 14 disposed outside the preform molding upper cylinder 6 , the preform injection cooling channel 14 is spiral-shaped, and the preform injection cooling channel 14 is connected to the connecting groove 12 .

[0030] In this embodiment, after the cooling water flows into the preform injection molding cooling channel 14, the outside of the plastic part is cooled in all directions through the preform injection molding cooling channel 14, so the cooling area is large and the cooling effect is good.

[0031] The injection upper mold 2 is provided with a water inlet 15, which is connected to the semi-open cooling groove 11. The injection upper mold 2 is also provided with a water outlet 16, which is connected to the bottom of the preform injection cooling channel 14. The water inlet 15 and the water outlet 16 are parallel to each other.

[0032] In this embodiment, during injection molding, cooling water enters through the water inlet 15 and is discharged through the water outlet 16 after cooling. The water inlet 15 and the water outlet 16 are parallel to each other and have a reasonable structure.

[0033] The preform molding auxiliary member 9 includes a preform inner side molding rod 17 arranged inside the preform molding lower cylinder 4 , the preform molding middle cylinder 5 and the preform molding upper cylinder 6 .

[0034] In this embodiment, the inner molding rod 17 of the bottle embryo is used to assist in molding the inner structure of the plastic part.

[0035] Combination Figure 1-4 As shown, the injection molding diverter 3 includes an injection molding main plate 18 , an injection molding diverter plate 19 and an injection molding nozzle 20 which are arranged above the injection molding upper mold 2 . The injection molding nozzle 20 extends into the injection molding port 13 .

[0036] In this embodiment, during injection molding, the molten material is injected through the injection molding main board 18 , and then diverted by the injection molding diverter plate 19 , and then injected into the injection port 13 through the injection nozzle 20 .

[0037] Combination Figure 1-4 As shown, a fixed sleeve plate 21 is provided between the injection molding main plate 18 and the injection molding upper mold 2 , and the injection molding diverter plate 19 is snap-connected with the fixed sleeve plate 21 .

[0038] In this embodiment, the fixing sleeve 21 is used to fix the injection molding manifold 19 .

[0039] Combination Figure 1-4 As shown, a sealing sleeve 22 is provided between the preform molding lower cylinder 4 and the preform molding middle cylinder 5 , and the preform molding lower cylinder 4 and the preform molding middle cylinder 5 are respectively engaged with the sealing sleeve 22 .

[0040] In this embodiment, the sealing sleeve 22 is used to clamp and fix the preform molding lower cylinder 4 and the preform molding middle cylinder 5 to play a sealing role.

[0041] The working principle of the utility model is:

[0042] During the injection molding process, the preform molding lower cylinder 4, the preform molding middle cylinder 5 and the preform molding upper cylinder 6 are brought close to each other, the molten material is injected through the injection molding main board 18, and then injected into the injection port 13 through the injection nozzle 20 after being diverted by the injection molding diverter plate 19, and the molten material is injected into the cavity between the preform molding lower cylinder 4, the preform molding middle cylinder 5 and the preform molding upper cylinder 6 and the preform molding auxiliary part 9. The preform inner side molding rod 17 is used to assist in molding the inner side structure of the preform plastic part. After the injection molding is completed, The cooling water is introduced into the semi-open cooling groove 11, and is now cooled at the injection port on the outside of the plastic part, and then flows into the preform injection molding cooling channel 14 through the connecting groove 12. The outside of the plastic part is cooled in all directions through the preform injection molding cooling channel 14, and the cooling area is large and the cooling effect is good. The injection port with a higher temperature is cooled first, and then the entire outer surface of the preform plastic part is cooled in a cold zone, which can avoid the plastic part from bursting due to excessive cooling temperature difference, and can strengthen the overall structural strength of the preform and improve the yield rate.

[0043] During injection molding, cooling water enters through the water inlet 15 and is discharged through the water outlet 16 after cooling. The water inlet 15 and the water outlet 16 are parallel to each other and have a reasonable structure. The fixed sleeve 21 is used to fix the injection molding diverter plate 19, and the sealing sleeve 22 is used to clamp and fix the preform molding lower cylinder 4 and the preform molding middle cylinder 5 to play a sealing role.

[0044] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the spirit of the present invention.

[0045] Although the following terms are used more frequently in this article, such as injection lower mold 1, injection upper mold 2, injection diverter 3, preform molding lower cylinder 4, preform molding middle cylinder 5, preform molding upper cylinder 6, explosion-proof injection cooling assembly 7, preform outer cooling part 8, preform molding auxiliary part 9, injection alignment sleeve 10, semi-open cooling groove 11, connecting groove 12, injection port 13, preform injection cooling channel 14, water inlet 15, water outlet 16, preform inner molding rod 17, injection main board 18, fixed sleeve 21, sealing sleeve 22, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model, and interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A preform injection mold with an enhanced explosion-proof mold cavity water channel structure, comprising an injection lower mold (1) and an injection upper mold (2), characterized in that: An injection molding flow divider (3) is provided above the injection molding upper mold (2); a preform molding lower cylinder (4), a preform molding middle cylinder (5) and a preform molding upper cylinder (6) are provided between the injection molding lower mold (1) and the injection molding upper mold (2); an explosion-proof injection molding cooling component (7) is provided on the top of the preform molding upper cylinder (6); the explosion-proof injection molding cooling component (7) is engaged with the preform molding upper cylinder (6); a preform molding outer cooling portion (8) is provided on the outer side of the preform molding upper cylinder (6); and a preform molding auxiliary component (9) is sleeved inside the preform molding lower cylinder (4), the preform molding middle cylinder (5) and the preform molding upper cylinder (6).

2. The preform injection mold with an enhanced explosion-proof mold cavity water channel structure according to claim 1, characterized in that: The explosion-proof injection molding cooling assembly (7) comprises an injection molding alignment sleeve (10) arranged on the top of a preform molding upper cylinder (6), a semi-open cooling groove (11) is arranged on the outside of the injection molding alignment sleeve (10), and a connecting groove (12) is arranged at the bottom of the semi-open cooling groove (11) and is connected to the cooling part (8) on the outside of the preform.

3. The preform injection mold with an enhanced explosion-proof mold cavity water channel structure according to claim 2, characterized in that: An injection port (13) penetrating through the injection molding alignment sleeve (10) is provided in the injection molding alignment sleeve (10).

4. The preform injection mold with an enhanced explosion-proof mold cavity water channel structure according to claim 3, characterized in that: The preform outer cooling portion (8) comprises a preform injection cooling channel (14) arranged on the outer side of the preform molding upper cylinder (6); the preform injection cooling channel (14) is spiral-shaped; and the preform injection cooling channel (14) is connected to the connecting groove (12).

5. The preform injection mold with enhanced explosion-proof mold cavity water channel structure according to claim 4, characterized in that: The injection upper mold (2) is provided with a water inlet (15), and the water inlet (15) is connected to the semi-open cooling groove (11).

6. The preform injection mold with enhanced explosion-proof mold cavity water channel structure according to claim 5, characterized in that: The injection upper mold (2) is also provided with a water outlet (16), the water outlet (16) is connected to the bottom of the preform injection cooling channel (14), and the water inlet (15) and the water outlet (16) are parallel to each other.

7. The preform injection mold with a reinforced explosion-proof mold cavity water channel structure according to claim 6, characterized in that: The preform molding auxiliary component (9) comprises a preform inner side molding rod (17) arranged inside the preform molding lower cylinder (4), the preform molding middle cylinder (5) and the preform molding upper cylinder (6).

8. The preform injection mold with enhanced explosion-proof mold cavity water channel structure according to claim 7, characterized in that: The injection molding flow divider (3) comprises an injection molding main board (18) arranged above the injection molding upper mold (2), an injection molding flow divider plate (19) and an injection molding nozzle (20), and the injection molding nozzle (20) extends into the injection molding port (13).

9. The preform injection mold with enhanced explosion-proof mold cavity water channel structure according to claim 8, characterized in that: A fixed sleeve plate (21) is provided between the injection molding main plate (18) and the injection molding upper mold (2), and the injection molding diverter plate (19) is clamped with the fixed sleeve plate (21).

10. The preform injection mold with enhanced explosion-proof mold cavity water channel structure according to claim 1, characterized in that: A sealing sleeve (22) is provided between the preform molding lower cylinder (4) and the preform molding middle cylinder (5), and the preform molding lower cylinder (4) and the preform molding middle cylinder (5) are respectively engaged with the sealing sleeve (22).

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