Rapid cooling device for plastic bottle injection mold
By designing cooling chambers for the bottle nozzle and bottle body in the injection mold of the plastic bottle, and setting a spiral guide plate in the cooling chamber of the bottle body, separate cooling of the bottle nozzle and bottle body is achieved, which solves the problem of uneven cooling in the prior art, improves the dimensional accuracy and structural stability of the plastic bottle, and reduces energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2026-04-10
AI Technical Summary
Existing rapid cooling devices for plastic bottle injection molds cannot separately cool the nozzle and body of the preform, resulting in insufficient or excessive cooling of critical parts, affecting dimensional accuracy and structural stability, while also increasing energy consumption and thermal memory effect.
The design includes a nozzle cooling chamber and a body cooling chamber, which cool the nozzle and body separately. A spiral guide plate is installed in the body cooling chamber to achieve gradient cooling. The nozzle and body are cooled separately through an independent coolant delivery structure.
It improves the dimensional accuracy and structural stability of key parts such as bottle mouth and threads, avoids demolding deformation, reduces secondary heating energy consumption, maintains the thermal memory effect of the bottle body, and ensures that the preform quickly recovers to the appropriate temperature before blow molding.
Smart Images
Figure CN224103469U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of plastic bottle injection moulding, more particularly to a plastic bottle injection moulding mould rapid cooling device. BACKGROUND
[0002] In the injection moulding production process of the plastic bottle, the cooling treatment after the injection moulding preforming bottle embryo is a key link, therefore a rapid cooling device needs to be arranged, and the plastic bottle injection moulding mould rapid cooling device mostly sets a cavity in the one circle of the bottle body injection cavity in the mould, then injects cooling liquid into the cavity to cool the preforming bottle embryo after injection moulding.
[0003] However, the cavity in the prior art rapid cooling device is usually of an integral structure, and the bottle body and the bottle mouth of the preforming bottle embryo are uniformly cooled, and in the injection moulding process, the key parts such as the bottle mouth and the thread need to be strengthened to ensure the dimensional accuracy, the integral cooling cavity cannot provide sufficient cooling strength for these key parts, and the material flowability of these parts may cause deformation when demoulding, thereby affecting the thread accuracy and the bottle mouth sealing performance, and the structural stability of the bottle embryo cannot be ensured, which adversely affects the subsequent blow moulding process, on the other hand, the integral cooling cavity uniformly cools the bottle body and the bottle mouth, which may cause excessive cooling of the bottle body area, increases the energy consumption of secondary heating, and may affect the "thermal memory effect" of the bottle embryo, so that the bottle embryo cannot quickly recover to the appropriate temperature during blow moulding, and the wall thickness is uneven, therefore, the utility model provides a plastic bottle injection moulding mould rapid cooling device. UTILITY MODEL CONTENTS
[0004] The utility model discloses a plastic bottle injection moulding mould rapid cooling device to overcome the deficiency of the prior art, adapt to the actual need, and solve the technical problem that the current plastic bottle injection moulding mould rapid cooling device is inconvenient for separate cooling of the bottle mouth and the bottle body of the preforming bottle embryo.
[0005] To solve the above technical problems, the utility model provides the following technical scheme: a plastic bottle injection moulding mould rapid cooling device, including cooling liquid delivery structure, first mould and second mould, the first mould and second mould are combined to form bottle body injection cavity in, the first mould and second mould top are provided with the injection moulding hole that is with bottle body injection cavity center symmetry, the first mould and second mould are located the bottle mouth one circle of bottle body injection cavity and are provided with bottle mouth cooling cavity, the first mould and second mould are located the bottle body one circle of bottle body injection cavity and are provided with bottle body cooling cavity, the first mould one side is provided with two groups of water inlet channels, a group of water inlet channels and bottle mouth cooling cavity are connected, and another group of water inlet channels are connected with bottle body cooling cavity, the second mould one side is provided with two groups of water outlet channels, a group of water outlet channels and bottle mouth cooling cavity are connected, and another group of water outlet channels are connected with bottle body cooling cavity.
[0006] The bottle body cooling cavity is provided with a flow guide plate in a spiral shape.
[0007] Preferably, the cooling liquid conveying structure comprises a box body, two groups of heating pipes are symmetrically arranged on the front side of the box body, a conveying pump is arranged on the front side of the cooling liquid conveying structure, the input end of the conveying pump is connected with the output end of the box body through a pipeline, the output end of the conveying pump is connected with the output end of the bottom of the two groups of heating pipes through a pipeline, the output end of the top of one group of the heating pipes is connected with one group of water inlet channels of the first mold through a hose, the output end of the top of the other group of the heating pipes is connected with the other group of water inlet channels of the first mold through a hose, a three-way pipe is arranged between the two groups of water outlet channels of the second mold, the output end of the three-way pipe is connected with the input end of the box body through a hose, and valves are arranged on the ports of the water inlet channels and the water outlet channels.
[0008] Preferably, an electric heating rod is arranged in the heating pipe, and a temperature sensor is arranged on the top of the heating pipe.
[0009] Preferably, symmetric semicircular holes, half injection cavities, first half ring cavities and second half ring cavities are arranged on the opposite sides of the first mold and the second mold, the semicircular holes on the first mold and the second mold are combined to form an injection hole, the half injection cavities on the first mold and the second mold are combined to form a bottle body injection cavity, the first half ring cavities on the first mold and the second mold are combined to form a bottle mouth cooling cavity, and the second half ring cavities on the first mold and the second mold are combined to form a bottle body cooling cavity.
[0010] Preferably, the flow guide plate is composed of a first combined rod piece and a second combined rod piece, the first combined rod piece is arranged in the second half ring cavity of the first mold, and the second combined rod piece is arranged in the second half ring cavity of the second mold.
[0011] Preferably, the first half ring cavity and the second half ring cavity of the first mold are both provided with a rectangular insertion frame on the two ports, and a rubber strip is arranged on the rectangular insertion frame, and the first half ring cavity and the second half ring cavity of the second mold are both provided with a rectangular insertion groove corresponding to the rectangular insertion frame.
[0012] Compared with the prior art, the utility model has the beneficial effects that:
[0013] 1. The utility model discloses a bottle mouth cooling cavity and bottle body cooling cavity are designed, and the bottle mouth cooling cavity is arranged in the bottle mouth of bottle body injection cavity one week, and the bottle body cooling cavity is arranged in the bottle body of bottle body injection cavity one week, then the water inlet channel and water outlet channel are all set up on the bottle mouth cooling cavity and bottle body cooling cavity, then through the cooling liquid delivery structure can carry out the cooling liquid delivery of bottle mouth cooling cavity and bottle body cooling cavity alone, realize the bottle mouth and bottle body of preforming bottle body are cooled alone, replace traditional integral type cooling mode, in this way, can strengthen the cooling of bottle mouth, thread and other key parts, guarantee the dimensional accuracy and structural stability of these parts, avoid the deformation problem when demolding, improve the thread accuracy and bottle mouth leakproofness of the bottle embryo, solve the technical problem that the current plastic bottle injection mold quick cooling device is not convenient for the separate cooling of the bottle mouth and bottle body of preforming bottle embryo, therefore, the utility model has the advantage that the bottle body and bottle mouth of injection preforming bottle body are cooled separately.
[0014] 2. The utility model discloses a guide vane still is set up in the bottle body cooling cavity, and the guide vane is helical, and the water inlet channel of bottle body cooling cavity is located in the upper, and the water outlet channel is located in the lower, then the cooling liquid that enters the bottle body cooling cavity through the water inlet channel will be helical flow in the bottle body cooling cavity from top to bottom under the cooperation of the guide vane, make the cooling liquid temperature in the bottle body cooling cavity from the one end of being close to bottle mouth forming area to the one end of being far from bottle mouth forming area form stable temperature gradually increasing gradient change, that is, realize the gradient cooling of bottle body stability, like this, the bottle body area can keep higher residual temperature in the cooling process, avoid complete vitrification, make the bottle embryo have " hot memory effect", through infrared heating furnace can restore to 160-220 DEG C's blow molding applicable temperature before blow molding, reduce secondary heating energy consumption, further improve the effect of the bottle mouth and bottle body separation cooling of preforming bottle body. ACCURACY
[0015] Figure 1 It is the first overall structure schematic drawing of the utility model,
[0016] Figure 2 It is the second overall structure schematic drawing of the utility model,
[0017] Figure 3 It is the first mould and second mould section view schematic drawing of the utility model,
[0018] Figure 4 It is the first mould section view structure schematic drawing of the utility model,
[0019] Figure 5 It is the second mould section view structure schematic drawing of the utility model,
[0020] Figure 6 It is the Figure 4 Enlarged structure schematic drawing of the utility model in A place
[0021] Figure 7 The utility model discloses a Figure 5 Amplification schematic view of B place in the middle
[0022] Figure 8 It is the heating pipeline section structure schematic diagram of the utility model.
[0023] Mark explanation in the drawing:
[0024] 1, cooling liquid delivery structure;101, box;102, delivery pump;103, heating pipeline;104, electric heating rod;105, temperature sensor;2, first mould;3, second mould;4, injection hole;401, semicircular hole;5, bottle body injection cavity;501, half injection cavity;6, bottle nozzle cooling cavity;601, first half ring cavity;7, bottle body cooling cavity;701, second half ring cavity;702, rectangular insertion frame;703, adhesive tape;704, rectangular insertion slot;8, flow guide plate;801, first combined rod piece;802, second combined rod piece;9, water inlet channel;10, water outlet channel;11, valve;12, three-way pipe. Specific implementation
[0025] As Figures 1 to 8 shown, the utility model relates to a kind of plastic bottle injection mould rapid cooling device, including cooling liquid delivery structure 1, first mould 2 and second mould 3, and bottle body injection cavity 5 is formed in combination in first mould 2 and second mould 3, injection hole 4 is set in the top of first mould 2 and second mould 3 with the center symmetry of bottle body injection cavity 5, bottle nozzle cooling cavity 6 is set in the bottle nozzle of bottle body injection cavity 5 around first mould 2 and second mould 3, bottle body cooling cavity 7 is set in the bottle body of bottle body injection cavity 5 around first mould 2 and second mould 3, two groups of water inlet channels 9 are set in the side of first mould 2, one group of water inlet channels 9 and bottle nozzle cooling cavity 6 are communicated, another group of water inlet channels 9 and bottle body cooling cavity 7 are communicated, two groups of water outlet channels 10 are set in the side of second mould 3, one group of water outlet channels 10 and bottle nozzle cooling cavity 6 are communicated, another group of water outlet channels 10 and bottle body cooling cavity 7 are communicated;Symmetrical semicircular hole 401, half injection cavity 501, first half ring cavity 601 and second half ring cavity 701 are set in the opposite side of first mould 2 and second mould 3, semicircular hole 401 on first mould 2 and second mould 3 is combined to form injection hole 4, half injection cavity 501 on first mould 2 and second mould 3 is combined to form bottle body injection cavity 5, first half ring cavity 601 on first mould 2 and second mould 3 is combined to form bottle nozzle cooling cavity 6, second half ring cavity 701 on first mould 2 and second mould 3 is combined to form bottle body cooling cavity 7;
[0026] The injection molding hole 4 can be used to inject the bottle body into the injection molding cavity 5 to form a preformed bottle body. After injection molding, the cooling liquid conveying structure 1 and the water inlet channel 9 can be used to convey cooling liquid into the bottle mouth cooling cavity 6 and the bottle body cooling cavity 7 separately, so as to cool the bottle mouth and the bottle body of the preformed bottle body separately, instead of the traditional integrated cooling mode. In this way, the key parts such as the bottle mouth and the thread can be strengthened and cooled, so as to ensure the dimensional accuracy and structural stability of these parts, avoid deformation during demolding, and improve the thread accuracy and bottle mouth sealing performance of the bottle embryo.
[0027] Specifically, the cooling liquid conveying structure 1 comprises a box body 101, two groups of heating pipes 103 are symmetrically arranged on the front side of the box body 101, a conveying pump 102 is arranged on the front side of the cooling liquid conveying structure 1, the input end of the conveying pump 102 is connected with the output end of the box body 101 through a conduit, the output end of the conveying pump 102 is connected with the bottom output end of the two groups of heating pipes 103 through a conduit, the top output end of one group of heating pipes 103 is connected with one group of water inlet channels 9 on the first mold 2 through a hose, the top output end of the other group of heating pipes 103 is connected with the other group of water inlet channels 9 on the first mold 2 through a hose, a three-way pipe 12 is connected between the two groups of water outlet channels 10 on the second mold 3, the output end of the three-way pipe 12 is connected with the input end of the box body 101 through a hose, and valve doors 11 are arranged on the ports of the water inlet channels 9 and the water outlet channels 10; an electric heating rod 104 is arranged in the heating pipe 103, and a temperature sensor 105 is arranged on the top of the heating pipe 103; the conveying pump 102 can convey the cooling liquid in the box body 101 to the two groups of heating pipes 103, then the electric heating rods 104 in the two groups of heating pipes 103 can heat the cooling liquid, and the temperature of the cooling liquid is monitored by the temperature sensor 105, then the cooling liquid of different temperatures can be controlled to enter the corresponding bottle mouth cooling cavity 6 and bottle body cooling cavity 7 to cool the bottle body and bottle mouth to different degrees, and at the same time, the flow rate of the cooling liquid in the bottle mouth cooling cavity 6 and the bottle body cooling cavity 7 can be controlled by adjusting the flow of the water inlet channels 9 and the water outlet channels 10 through the valve doors 11, so as to achieve different cooling effects on the bottle mouth and the bottle body. The cooled cooling liquid is discharged from the corresponding water outlet channel 10, and then flows into the box body 101 through the three-way pipe 12 and the hose again, so as to form a cooling liquid circulation structure, which is energy-saving and environmentally friendly.
[0028] Further, the first half ring cavity 601 and the second half ring cavity 701 of the first mold 2 are arranged with rectangular insertion frames 702 at both ends, and the rectangular insertion frames 702 are arranged with adhesive strips 703, and the first half ring cavity 601 and the second half ring cavity 701 of the second mold 3 are provided with rectangular insertion grooves 704 corresponding to the rectangular insertion frames 702; after the first mold 2 and the second mold 3 are combined, the rectangular insertion frames 702 on the first mold 2 are inserted into the rectangular insertion grooves 704 of the second mold 3 in cooperation with the adhesive strips 703, so that the sealing performance of the first half ring cavity 601 and the second half ring cavity 701 of the first mold 2 and the second mold 3 is ensured.
[0029] In the embodiment of the utility model, the bottle body cooling cavity 7 is arranged with a guide plate 8, and the guide plate 8 is in spiral shape; the guide plate 8 is composed of a first combined rod 801 and a second combined rod 802, and the first combined rod 801 is located in the second half ring cavity 701 of the first mold 2, and the second combined rod 802 is located in the second half ring cavity 701 of the second mold 3.
[0030] The cooling liquid entering the bottle body cooling cavity 7 through the water inlet channel 9 flows spirally from top to bottom in the bottle body cooling cavity 7 under the cooperation of the spiral guide plate 8, so that the temperature of the cooling liquid in the bottle body cooling cavity 7 gradually increases from one end close to the bottle mouth forming area to the other end away from the bottle mouth forming area, that is, the stable gradient change is formed, and the stable gradient cooling of the bottle body is realized. In this way, the bottle body region can retain a higher residual temperature during the cooling process, avoid complete vitrification, and make the preform have a "thermal memory effect". Through the infrared heating furnace before blowing, the blowing temperature can be quickly restored to 160-220 DEG C, the secondary heating energy consumption is reduced, and the effect of separating and cooling the bottle mouth and the bottle body of the preformed bottle body is further improved.
[0031] Working principle: the embodiment provides a plastic bottle injection mold rapid cooling device, first, through the injection hole 4, the bottle body injection cavity 5 can be injection molded, and a preformed bottle body is formed, after injection, the cooling liquid conveying structure 1 and the water inlet channel 9 can convey cooling liquid in the bottle mouth cooling cavity 6 and the bottle body cooling cavity 7 separately, realize the separate cooling of the bottle mouth and the bottle body of the preformed bottle body, replace the traditional integrated cooling mode, in this way, the key parts such as the bottle opening and the thread can be strengthened and cooled, the size precision and structural stability of these parts are ensured, the deformation problem during demolding is avoided, and the thread precision and bottle opening sealing performance of the preform are improved.
[0032] Secondly, the cooling liquid entering into the bottle body cooling cavity 7 through the water inlet channel 9 will flow spirally from top to bottom in the bottle body cooling cavity 7 under the cooperation of the screw guide plate 8, so that the temperature of the cooling liquid in the bottle body cooling cavity 7 gradually increases from one end close to the bottle mouth forming area to the other end far from the bottle mouth forming area, that is, the stable gradient change of the temperature is formed, and the stable gradient cooling of the bottle body is realized. In this way, the bottle body area can keep a higher residual temperature during the cooling process, avoids complete vitrification, and makes the preform have a "thermal memory effect". Before blowing, the preform can be quickly restored to a blowing suitable temperature of 160-220 DEG C through an infrared heating furnace, secondary heating energy consumption is reduced, and the effect of separating and cooling the bottle mouth and the bottle body of the preform is further improved.
[0033] The embodiments of the present application are disclosed, but the present application is not limited to the embodiments, and the ordinary skilled in the art can easily understand the spirit of the present application according to the above embodiments, and make different inferences and changes, as long as the inferences and changes do not deviate from the spirit of the present application, and are within the protection scope of the present application.
Claims
1. A device for rapid cooling of a plastic bottle injection mold, characterized in that, The utility model provides cooling liquid conveying structure (1), first mould (2) and second mould (3), and the first mould (2) and second mould (3) are combined to form bottle body injection cavity (5) in, the first mould (2) and second mould (3) top are provided with injection hole (4) with bottle body injection cavity (5) center symmetry, the first mould (2) and second mould (3) are located bottle nozzle one week of bottle body injection cavity (5) and are provided with bottle nozzle cooling cavity (6), the first mould (2) and second mould (3) are located bottle body one week of bottle body injection cavity (5) and are provided with bottle body cooling cavity (7), the first mould (2) one side is provided with two groups of water inlet channel (9), and one group of water inlet channel (9) is connected with bottle nozzle cooling cavity (6), and another group of water inlet channel (9) is connected with bottle body cooling cavity (7), and the second mould (3) one side is provided with two groups of water outlet channel (10), and one group of water outlet channel (10) is connected with bottle nozzle cooling cavity (6), and another group of water outlet channel (10) is connected with bottle body cooling cavity (7), The bottle body cooling cavity (7) is arranged with a guide vane (8), and the guide vane (8) is spiral.
2. The device for rapid cooling of a plastic bottle injection mold according to claim 1, characterized in that, The cooling liquid conveying structure (1) includes a box body (101), two groups of heating pipes (103) are symmetrically arranged on the front side of the box body (101), a conveying pump (102) is arranged on the front side of the cooling liquid conveying structure (1), the input end of the conveying pump (102) is connected with the output end of the box body (101) through a conduit, the output end of the conveying pump (102) is connected with the bottom output ends of the two groups of heating pipes (103) through a conduit, the top output end of one group of the heating pipes (103) is connected with one group of water inlet channels (9) on the first mould (2) through a hose, the top output end of the other group of the heating pipes (103) is connected with the other group of water inlet channels (9) on the first mould (2) through a hose, a three-way pipe (12) is connected between the two groups of water outlet channels (10) on the second mould (3), the output end of the three-way pipe (12) is connected with the input end of the box body (101) through a hose, and valve doors (11) are arranged on the ports of the water inlet channels (9) and the water outlet channels (10).
3. The device for rapid cooling of a plastic bottle injection mold according to claim 2, characterized in that, An electric heating rod (104) is arranged in the heating pipe (103), and a temperature sensor (105) is arranged on the top of the heating pipe (103).
4. The device for rapid cooling of a plastic bottle injection mold according to claim 1, wherein, Symmetrical semicircular holes (401), half injection cavities (501), first half ring cavities (601) and second half ring cavities (701) are arranged on the opposite sides of the first mould (2) and the second mould (3), the semicircular holes (401) on the first mould (2) and the second mould (3) are combined to form the injection hole (4), the half injection cavities (501) on the first mould (2) and the second mould (3) are combined to form the bottle body injection cavity (5), the first half ring cavities (601) on the first mould (2) and the second mould (3) are combined to form the bottle nozzle cooling cavity (6), and the second half ring cavities (701) on the first mould (2) and the second mould (3) are combined to form the bottle body cooling cavity (7).
5. The device for rapid cooling of a plastic bottle injection mold according to claim 4, characterized in that, The flow guide plate (8) is composed of a first combined rod (801) and a second combined rod (802), the first combined rod (801) is located in the second half ring cavity (701) of the first mold (2), and the second combined rod (802) is located in the second half ring cavity (701) of the second mold (3).
6. The device for rapid cooling of a plastic bottle injection mold according to claim 4, characterized in that, The first half ring cavity (601) and the second half ring cavity (701) of the first mold (2) are both arranged with a rectangular insertion frame (702) at both ends, and the rectangular insertion frame (702) is arranged with a rubber strip (703), and the first half ring cavity (601) and the second half ring cavity (701) of the second mold (3) are both provided with a rectangular insertion groove (704) corresponding to the rectangular insertion frame (702).