A lid-making mold with multi-channel water-cooling

Abstract

A cap-making mold with multi-channel water-cooling according to the present invention includes an upper mold and a lower mold. An upper mold surface of the upper mold and a lower mold surface of the lower mold cooperate to form a mold cavity for molding the bottle cap. The upper mold further includes an upper mold body, a cooling module, and an ejection module. The cooling module includes a first water-carrying component and a second water-carrying component. The first water-carrying component adopts the way of sleeve water-carrying, and includes an inner sleeve and an upper mold water-separating sleeve sleeved outside the inner sleeve. The second water-carrying component is arranged along the circumference of the first water-carrying component, and includes a water-distributing sleeve, a threaded core outer sleeve connected to the lower end of the water-distributing sleeve, and a threaded core inner sleeve cooperating with the inner wall of the lower end of the threaded core outer sleeve, and a core cooling channel is formed at the same time. The present invention solves the problem of traditional part fracture, improves the service life, the unidirectional flow cooling water is more uniform, and improves the cooling effect and cooling efficiency.

Description

Technical Field

[0001] The present invention relates to the field of cap manufacturing molds, and particularly to a cap manufacturing mold with multi-channel water circulation cooling. Background Art

[0002] China is a major country in the world in terms of packaging manufacturing and consumption. The proportion of plastic packaging in the total output value of the packaging industry has exceeded 30%, becoming a main force in the packaging industry and playing an irreplaceable role in various fields such as food, beverages, daily necessities, and industrial and agricultural production. In recent years, the packaging products and packaging materials in the plastic packaging industry have grown steadily, and new packaging materials, new processes, new technologies, and new products have emerged continuously. Nowadays, most of the packaging for various beverages, cosmetics, drugs, etc. uses plastic packaging, and plastic bottle caps are indispensable for plastic bottle structures. Plastic bottle caps often need to be produced separately.

[0003] There are various types of machinery and equipment for manufacturing plastic bottle caps, among which the die pressing cap machine is the most commonly used. At present, multiple die pressing cap manufacturing molds are adopted in die pressing cap machines. These cap manufacturing molds all include an upper mold and a lower mold, and a water circulation cooling structure is provided in the upper mold. For example, Figure 1 In the prior art, a commonly used water circulation cooling structure is provided. The inner sleeve 207' of the threaded core is threadedly connected to the inner wall of the water distribution sleeve 210', and the outer sleeve 208' of the threaded core is connected to the inner wall of the water distribution sleeve 210'. Through the combination of the outer sleeve 208' of the threaded core and the inner sleeve 207' of the threaded core, a water circulation channel C is formed between the inner wall of the outer sleeve 208' of the threaded core and the outer wall of the inner sleeve 207' of the threaded core. However, this structural design results in that the outer sleeve 208' of the threaded core and the inner sleeve 207' of the threaded core have no assembly relationship and are two completely independent parts. This leads to a thin wall thickness in part of the inner sleeve 207' of the threaded core located inside. When the cap manufacturing mold performs the mold opening and closing operations, the inner sleeve 207' of the threaded core is prone to lateral deformation, the mold gets stuck, and there are serious problems such as fracture and failure due to stress concentration at positions A and B in Figure 1 Moreover, such a design makes the outer sleeve 208' of the threaded core and the inner sleeve 207' of the threaded core complex in processing technology, high in manufacturing cost, poor in strength, and poor in pressure resistance, further increasing the later maintenance cost of the enterprise and reducing the production efficiency.

[0004] At the same time, the traditional water circulation cooling method adopts a structure where the channels are divided into 5 parts in the vertical direction for water inlet, and are divided into 2 parts at the bottom. These 2 parts of the channels rotate half a circle and then return water through the other 5 parts of the channels on the opposite side. This structural design easily causes uneven water flow and poor cooling effect in the 2 parts of the channels, resulting in poor cooling and shaping effect of the bottle cap. Summary of the Invention

[0005] In view of the above situation, the present invention provides a lid-making mold with multi-channel water transportation cooling, which solves the serious problem of part fracture in the prior art, has a long service life, and at the same time adopts a straight-through one-way flow channel to improve the cooling effect.

[0006] To achieve this object, the present invention provides a cap-making mold with multi-channel water circulation cooling for preparing bottle caps. The bottle cap includes a bottom and a threaded side wall formed around the bottom in its circumferential direction. The cap-making mold with multi-channel water circulation cooling includes an upper mold and a lower mold. An upper mold surface of the upper mold and a lower mold surface of the lower mold cooperate to form a mold cavity for molding the bottle cap. The upper mold further includes an upper mold body, which includes a cylindrical pipe sleeve and a fixed mounting member, and the fixed mounting member is installed at the upper end of the cylindrical pipe sleeve; a cooling module for cooling and shaping the bottle cap in the mold cavity; and an ejection module, including an air flow-assisted ejection structure for assisting in blowing out the bottle cap. Among them, the cooling module includes a first water circulation component arranged at the axis of the cylindrical pipe sleeve, which includes an inner sleeve, an upper mold water isolation sleeve and a joint. The inner sleeve is coaxially arranged in the upper mold water isolation sleeve, and an upper mold cooling cavity is formed at the bottom of the upper mold water isolation sleeve. The upper end of the inner sleeve extends to one end of the fixed mounting member and is connected to the joint. A first liquid inlet channel is formed in the axis of the inner sleeve, and the first liquid inlet channel extends from the joint to the upper mold cooling cavity. A first liquid return channel is formed between the inner wall of the upper mold water isolation sleeve and the outer wall of the inner sleeve. The upper end of the upper mold water isolation sleeve is connected to the fixed mounting member, and a first liquid return port communicating with the first liquid return channel is further provided on the fixed mounting member; and a second water circulation component arranged in the circumferential direction of the first water circulation component, which includes a water distribution sleeve, a threaded core outer sleeve and a threaded core inner sleeve;The water diversion sleeve is sleeved on the upper part of the upper die water isolation sleeve. A second liquid inlet flow channel and a second liquid return flow channel are arranged in the wall body of the water diversion sleeve. The upper end of the outer sleeve of the threaded core is matched with the lower end of the upper die water isolation sleeve. An inlet liquid diversion flow channel and a return liquid diversion flow channel communicated with the second liquid inlet flow channel and the second liquid return flow channel are respectively arranged in the wall body of the outer sleeve of the threaded core. The lower end of the outer sleeve of the threaded core extends downward to the bottom of the upper die water isolation sleeve. A thread groove is arranged on the outer wall circumference of the outer sleeve of the threaded core near the bottom of the upper die water isolation sleeve. The inner sleeve of the threaded core is sleeved on the bottom of the upper die water isolation sleeve and is located between the outer sleeve of the threaded core and the upper die water isolation sleeve. The upper end of the inner sleeve of the threaded core is connected with the inner wall of the outer sleeve of the threaded core. A core cooling flow channel for cooling and shaping the threaded side wall of the bottle cap is formed at the position corresponding to the thread groove between the outer side wall of the inner sleeve of the threaded core and the inner side wall of the outer sleeve of the threaded core. The core cooling flow channel includes a diversion cavity, a return flow cavity and an upper die liquid collecting flow channel. The inlet liquid diversion flow channel and the return liquid diversion flow channel are respectively communicated with the diversion cavity and the return flow cavity. The diversion cavity is communicated with the upper die liquid collecting flow channel through a predetermined number of upper die diversion grooves arranged on the outer side wall of the inner sleeve of the threaded core. The upper die liquid collecting flow channel rotates one circle along the outer side wall circumference of the inner sleeve of the threaded core and is then communicated with the return flow cavity through a predetermined number of upper die return grooves arranged on the outer side wall of the inner sleeve of the threaded core.;

[0007] Preferably, the lower die includes a die base and a third water transportation component. The third water transportation component is arranged in the die base. The third water transportation component includes a lower die water isolation sleeve, a lower die pressing sleeve and a lower die cavity sleeve. The lower die cavity sleeve is located above the die base. A lower die cooling cavity is formed between the upper end of the die base and the outer bottom of the lower die cavity. A third liquid inlet flow channel communicated with the lower die cooling cavity is arranged in the middle of the die base. The lower die water isolation sleeve is arranged along the circumference of the lower die cavity sleeve, and a spiral water transportation flow channel is formed between the lower die water isolation sleeve and the outer side wall of the lower die cavity sleeve. The lower die pressing sleeve is arranged on the outer side of the die base and a third liquid return flow channel is formed between the lower die pressing sleeve and the lower die water isolation sleeve. One end of the spiral water transportation flow channel is communicated with the lower die cooling cavity, and the other end is communicated with the third liquid return flow channel.

[0008] Furthermore, the lower mold cooling cavity includes: a predetermined number of lower mold flow dividing grooves extending from the center of the bottom of the lower mold cavity sleeve to the surroundings and a lower mold liquid collecting flow channel arranged in a circumferential rotation around the bottom of the lower mold cavity sleeve; water transportation is realized in a divergent manner to the surroundings through the lower mold flow dividing grooves, and then enters the threaded water transportation flow channel after rotating one circle along the lower mold liquid collecting flow channel. The spiral water transportation flow channel flows into the third liquid return flow channel after circulating one way around the threaded side wall of the bottle cap. The one-way flow mode of the third water transportation component avoids the problems of uneven flow velocity and flow rate, increases the strength of the part, improves the cooling effect and cooling efficiency; moreover, it ensures that the cooling area of the cooling water in the lower mold liquid collecting flow channel extends to the highest point of the threaded side wall of the bottle cap, and in the one-way rotating flow area, the cooling efficiency is significantly improved.

[0009] Preferably, the upper end of the inner sleeve of the threaded core is threadedly connected to the inner wall of the outer sleeve of the threaded core.

[0010] Preferably, a first spring is sleeved at the position where the upper end of the outer sleeve of the threaded core is fitted with the water dividing sleeve to support and buffer the outer sleeve of the threaded core.

[0011] Preferably, a second spring is provided between the water dividing sleeve and the cylindrical pipe sleeve to support and buffer the water dividing sleeve, provide molding pressure, and be used for the reset of the upper mold after mold opening.

[0012] Preferably, the cylindrical pipe sleeve is connected to the fixed mounting member by screws.

[0013] Advantages of the present invention:

[0014] Compared with the prior art, a cap-making mold with multi-channel water-cooling provided by the present invention, wherein the upper mold includes a cooling module, and the cooling module includes a first water-transporting component and a second water-transporting component; wherein, the first water-transporting component adopts a tube-in-tube manner, that is, a first liquid inlet channel is formed inside the axis of the inner tube, the upper mold water-separating sleeve is sleeved outside the inner tube and an upper mold cooling cavity for bottom cooling and shaping of the bottle cap is formed at the bottom of the upper mold water-separating sleeve, and a first liquid return channel communicating with the upper mold cooling cavity is formed between the upper mold water-separating sleeve and the inner tube. Therefore, the first water-transporting component transports cooling water in a tube-in-tube manner. While ensuring the cooling effect, this design forms a convection of the low-temperature cooling water in the first liquid inlet channel and the heated cooling water in the first liquid return channel in terms of structure, thereby realizing the function of mutual heat exchange, so that the heated cooling water circulating back along the first liquid return channel is appropriately cooled. The first water-transporting component reduces the work done by external equipment to cool the heated cooling water while ensuring the cooling effect, reduces energy consumption, and thus reduces production costs. At the same time, the second water-transporting component is arranged along the circumferential direction of the first water-transporting component. A second liquid inlet channel and a second liquid return channel are arranged inside the wall of the water-separating sleeve. The upper end of the outer sleeve of the threaded core is matched with the lower end of the upper mold water-separating sleeve. An inlet liquid diversion channel and a return liquid diversion channel communicating with the second liquid inlet channel and the second liquid return channel are respectively arranged inside the wall of the outer sleeve of the threaded core. The inner sleeve of the threaded core is matched with the outer sleeve of the threaded core to form a core cooling channel for cooling and shaping the threaded side wall of the bottle cap. The structural design of the second water-transporting component for opening channels inside the wall ensures that the walls of the water-separating sleeve, the outer sleeve of the threaded core, and the inner sleeve of the threaded core all have a certain wall thickness, and the change in wall thickness is uniform. The two parts of the outer sleeve of the threaded core and the inner sleeve of the threaded core are combined into a whole to realize the transportation of cooling water. When the mold is opened and closed, the upper and lower movements of the mold are consistent, and the longitudinal tensile stress is no longer concentrated on the inner sleeve of the threaded core, solving the serious problem of traditional part fracture and improving the service life of the cap-making mold. Furthermore, the novel cooling channel of the second water-transporting component is designed in such a way that the cooling water enters the diversion cavity along the inlet liquid diversion channel and then is divided into a predetermined number of portions of cooling water by the upper mold diversion groove and directly reaches the upper mold liquid collecting channel, and then rotates one-way along the upper mold liquid collecting channel and enters the return cavity through the relatively arranged upper mold return groove, and finally enters the return liquid diversion channel; the water-transporting method of the second water-transporting component adopts a one-way flow, avoiding the generation of problems such as uneven flow velocity and flow rate, increasing the strength of the parts, and improving the cooling effect and cooling efficiency. Description of the Drawings

[0015] Figure 1 is the water-cooling structure of a cap-making mold in the prior art provided by the present invention;

[0016] Figure 2 It is a schematic three-dimensional structure diagram of a cap-making mold with multi-channel water transportation and cooling provided by an embodiment of the present invention;

[0017] Figure 3 It is a sectional view of a cap-making mold with multi-channel water transportation and cooling provided by an embodiment of the present invention;

[0018] Figure 4 is Figure 3 a schematic diagram of the mechanism of the second water transportation component in

[0019] Figure 5 is Figure 3 a schematic diagram of a partial structure of a cap-making mold with multi-channel water transportation and cooling in

[0020] Figure 6 is Figure 5 a view in the D-D direction in

[0021] Figure 7 It is a schematic diagram of a structure of an inner sleeve of a thread core provided by this embodiment.

[0022] In the figure: 1 - fixed mounting part, 2 - upper mold, 3 - lower mold, 4 - air inlet, 10 - bottle cap, 20 - upper mold body, 101 - first liquid return port, 201 - first liquid inlet, 201a - first liquid inlet joint, 202 - inner sleeve, 202a - first liquid inlet channel, 202b - first liquid return channel, 203 - screw, 204 - second spring, 205a - outer sleeve, 205b - inner sleeve, 206 - upper mold cooling cavity, 207, 207’ - inner sleeve of thread core, 207a - shunt cavity, 207b - upper mold shunt groove, 207c - upper mold liquid collecting channel, 207d - upper mold return groove, 207e - return cavity, 208, 208’ - outer sleeve of thread core, 208a - liquid inlet diversion channel, 208b - liquid return diversion channel, 209 - first spring, 210, 210’ - water distribution sleeve, 210a - second liquid inlet joint, 210b - second liquid return joint, 210c - second liquid inlet channel, 210d - second liquid return channel, 210e - second liquid inlet, 210f - second liquid return port, 211 - upper mold water isolation sleeve, 212 - core cooling channel, 213 - thread groove, 301 - lower mold water isolation sleeve, 302 - third liquid return channel, 303 - lower mold pressing sleeve, 304 - mold base, 304a - third liquid inlet channel, 304b - third liquid inlet, 305 - lower mold cooling cavity, 305a - lower mold shunt groove, 305b - lower mold liquid collecting channel, 306 - spiral water transportation channel, 307 - lower mold cavity sleeve. Specific embodiments

[0023] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Embodiment

[0025] It should be noted that in this embodiment, terms such as "wall body" and "inside the wall body" are used to describe the structure. For example, a water dividing sleeve 210, which is a sleeve structure with an inner wall and an opposite outer wall. The entity between the inner wall and the outer wall of the sleeve is defined as the wall body of the water dividing sleeve, and the position inside the wall body is the position between the inner wall and the outer wall. The descriptions of the wall bodies and the positions inside the wall bodies of other components in the text are the same as above.

[0026] Refer to Figure 2 and 3 This embodiment provides a multi-channel water-cooled cap-making mold for the preparation of a bottle cap 10, specifically for the compression molding of a plastic bottle cap 10. The bottle cap 10 includes a bottom and a threaded side wall formed around the bottom in its circumferential direction. The multi-channel water-cooled cap-making mold includes an upper mold 2 and a lower mold 3. An upper mold surface (not shown in the figure) of the upper mold 2 and a lower mold surface (not shown in the figure) of the lower mold 3 cooperate to form a mold cavity (not shown in the figure) for molding the bottle cap 10. Among them, the upper mold 2 includes an upper mold body 20, a cooling module, and an ejection module, and the lower mold 3 includes a mold base 304 and a third water delivery component.

[0027] Refer to Figure 2 and Figure 3 The upper mold body 20 includes a cylindrical pipe sleeve and a fixed mounting member 1. In this embodiment, the cylindrical pipe sleeve includes an outer pipe sleeve 205a and an inner pipe sleeve 205b. The fixed mounting member 1 is installed at the upper end of the outer pipe sleeve 205a of the cylindrical pipe sleeve by screws 203. Two fixed mounting holes are respectively provided on both sides of the fixed mounting member 1 to install the multi-channel water-cooled cap-making mold on a die pressing cap-making machine. One end of the inner pipe sleeve 205b is arranged inside the outer pipe sleeve 205a, and the other end extends downward to the lower mold surface (not shown in the figure).

[0028] Refer to Figure 2 and Figure 3, the cooling module is used to cool and shape the bottle cap 10 in the mold cavity (not shown in the figure), and it includes: a first water delivery component and a second water delivery component; wherein the first water delivery component is arranged at the axis of the cylindrical pipe sleeve, and the first water delivery component includes: an inner sleeve 202, an upper mold water isolation sleeve 211 and a first liquid inlet joint 201a. The inner sleeve 202 is coaxially arranged in the upper mold water isolation sleeve 211, and an upper mold cooling cavity 206 is formed at the bottom of the upper mold water isolation sleeve 211. The upper mold cooling cavity 206 realizes the cooling and shaping of the bottom of the bottle cap 10. The upper end of the inner sleeve 202 extends to one end of the fixed mounting member 1, and the first liquid inlet joint 201a is connected to a first liquid inlet 201 at its upper end. A first liquid inlet channel 202a is formed at the axis of the inner sleeve 202, and the first liquid inlet channel 202a extends from the joint to the upper mold cooling cavity 206. A first liquid return channel 202b is formed between the inner wall of the upper mold water isolation sleeve 211 and the outer wall of the inner sleeve 202. The upper end of the upper mold water isolation sleeve is connected to the fixed mounting member 1, and a first liquid return port 101 communicated with the first liquid return channel 202b is further arranged on the fixed mounting member 1.

[0029] Refer to Figure 2 , Figure 3 , Figure 4 and Figure 7, the second water delivery component is arranged along the circumferential direction of the first water delivery component, and includes: a water distribution sleeve 210, a threaded core outer sleeve 208, and a threaded core inner sleeve 207; the water distribution sleeve 210 is sleeved on the upper part of the upper die water isolation sleeve 211, and a second liquid inlet channel 210c and a second liquid return channel 210d are arranged in the wall body of the water distribution sleeve 210. The upper end of the threaded core outer sleeve 208 is matched with the lower end of the upper die water isolation sleeve 211. An inlet liquid diversion channel 208a and a return liquid diversion channel 208b communicating with the second liquid inlet channel 210c and the second liquid return channel 210d are respectively arranged in the wall body of the threaded core outer sleeve 208. The lower end of the threaded core outer sleeve 208 extends downward to the bottom of the upper die water isolation sleeve 211. A thread groove 213 is arranged on the outer wall circumference of the threaded core outer sleeve 208 near the bottom of the upper die water isolation sleeve 211. The threaded core inner sleeve 207 is sleeved on the bottom of the upper die water isolation sleeve 211 and is located between the threaded core outer sleeve 208 and the upper die water isolation sleeve 211. The upper end of the threaded core inner sleeve 207 is threadedly connected with the inner wall of the threaded core outer sleeve 208, and a core cooling channel 212 for cooling and shaping the threaded side wall of the bottle cap 10 is formed at the position corresponding to the thread groove 213 between the outer side wall of the threaded core inner sleeve 207 and the inner side wall of the threaded core outer sleeve 208. The core cooling channel 212 includes a diversion cavity 207a, a return cavity 207e, and an upper die liquid collecting channel 207c. The inlet liquid diversion channel 208a and the return liquid diversion channel 208b communicate with the diversion cavity 207a and the return cavity 207e respectively. The diversion cavity 207a communicates with the upper die liquid collecting channel 207c through a predetermined number of upper die diversion grooves 207b opened on the outer side wall of the threaded core inner sleeve 207. The upper die liquid collecting channel 207c rotates one circle along the circumferential direction of the outer side wall of the threaded core inner sleeve 207 and then communicates with the return cavity 207e through a predetermined number of upper die return grooves 207d opened on the outer side wall of the threaded core inner sleeve 207.

[0030] Further, a second liquid inlet joint 210a and a second liquid return joint 210b are respectively installed on a second liquid inlet 210e and a second liquid return port 210f corresponding to the second liquid inlet channel 210c and the second liquid return channel 210d at the upper end of the water distribution sleeve 210.

[0031] Further, a first spring 209 is sleeved at the position where the upper end of the threaded core sleeve 208 is fitted with the water distribution sleeve 210 to support and buffer the threaded core sleeve 208. A second spring 204 is provided between the water distribution sleeve 210 and the cylindrical pipe sleeve, and the second spring 204 is arranged at one end close to the fixed part to support and buffer the water distribution sleeve 210, provide molding pressure, and be used for the reset of the upper mold after mold opening.

[0032] Refer to Figure 3 and Figure 5 , the third water circulation component is arranged in the mold base 304. The third water circulation component includes: a lower mold water isolation sleeve 301, a lower mold pressing sleeve 303, and a lower mold cavity sleeve 307. The lower mold cavity sleeve 307 is located above the mold base 304. A first lower mold cooling cavity 305 is formed between the upper end of the mold base 304 and the outer bottom of the lower mold cavity. A third liquid inlet channel 304a communicating with the first lower mold cooling cavity 305 is opened in the middle of the mold base 304. A third liquid inlet 304b is opened at one end of the third cooling channel far from the first lower mold cooling cavity 305. The lower mold water isolation sleeve 301 is arranged along the circumference of the lower mold cavity sleeve 307, and a spiral water circulation channel 306 is formed between the lower mold water isolation sleeve 301 and the outer side wall of the lower mold cavity sleeve 307. The lower mold pressing sleeve 303 is arranged outside the mold base 304, and a third liquid return channel 302 is formed between the lower mold pressing sleeve 303 and the lower mold water isolation sleeve 301. One end of the spiral water circulation channel 306 communicates with the first lower mold cooling cavity 305, and the other end communicates with the third liquid return channel 302.

[0033] Among them, combined with Figure 6 , the first lower mold cooling cavity 305 includes: a predetermined number of lower mold diversion grooves 305a extending from the center of the bottom of the lower mold cavity sleeve 307 to the surroundings and a lower mold liquid collecting channel 305b arranged in a circumferential rotation around the bottom of the lower mold cavity sleeve 307; water is circulated in a divergent manner to the surroundings through the lower mold diversion grooves 305a, and then enters the threaded water circulation channel after rotating one circle along the lower mold liquid collecting channel 305b. The spiral water circulation channel 306 circulates unidirectionally around the threaded side wall of the bottle cap 10 and then flows into the third liquid return channel 302. The unidirectional flow mode of water circulation avoids the problems of uneven flow velocity and flow rate, increases the strength of parts, improves the cooling effect and cooling efficiency; moreover, it ensures that the cooling area of the cooling water in the lower mold liquid collecting channel 305b extends to the highest point of the threaded side wall of the bottle cap 10, and in the unidirectional rotation flow area, the cooling efficiency is significantly improved.

[0034] Refer to Figure 2 and Figure 3, the ejection module includes: an air flow assisted ejection structure for assisting in blowing out the bottle cap 10. The air flow assisted ejection structure includes an air inlet 4 and an air flow channel that enters the mold cavity (not shown in the figure) along the air inlet hole. The air inlet 4 is opened at the top end of the water distribution sleeve 210. The air flow channel extends downward along the wall body of the water distribution sleeve 210 to the outer wall of the water distribution sleeve 210, and then enters the gap between the outer wall of the threaded core outer sleeve 208 and the inner wall of the inner tube sleeve 205b through the gap between the outer wall of the water distribution sleeve 210 and the inner wall of the outer tube sleeve 205a in sequence, and finally accesses the mold cavity (not shown in the figure) to realize assisting in blowing out the bottle cap 10.

[0035] Combined with the attached drawings, the water transportation and cooling operation of this embodiment is realized as follows:

[0036] Water transportation of the first water transportation component: The low-temperature cooling water enters the upper mold cooling cavity 206 along the first liquid inlet channel 202a from the first liquid inlet joint 201a to realize the cooling and shaping of the bottom of the bottle cap 10. After the heat-exchanged low-temperature cooling water becomes the heated cooling water, it flows out from the first liquid return port 101 along the first liquid return channel 202b. Therefore, the first water transportation component transports the cooling water in a tube-in-tube manner. While ensuring the cooling effect, this design forms the convection of the low-temperature cooling water in the first liquid inlet channel 202a and the heated cooling water in the first liquid return channel 202b in terms of structure, thereby realizing the function of mutual heat exchange, appropriately cooling the heated cooling water circulating back along the first liquid return channel 202b. The first water transportation component reduces the work done by external equipment to cool the heated cooling water while ensuring the cooling effect, reduces energy consumption, and thus reduces production costs.

[0037] Water transportation of the second water transportation component: The low-temperature cooling water enters the core cooling channel 212 along the second liquid inlet channel 210c from the second liquid inlet joint 210a. The realization of the low-temperature cooling water in the core cooling channel 212 is as follows: The low-temperature cooling water first enters the diversion cavity 207a, and the diversion cavity 207a divides the low-temperature cooling water into a predetermined number of portions of cooling water along the upper mold diversion groove 207b and directly leads it to the upper mold liquid collection channel 207c, and then rotates one-way along the upper mold liquid collection channel 207c for one circle and enters the return cavity 207e through the relatively arranged upper mold return groove 207d, realizing the cooling and shaping of the threaded side wall of the bottle cap 10. At the same time, the low-temperature cooling water is transformed into the heated cooling water, and finally enters the liquid return diversion channel 208b and flows out along the second liquid return joint 210b. The water transportation method of the second water transportation component adopts a one-way flow to avoid the generation of problems such as uneven flow velocity and flow rate, and at the same time increases the part strength, improves the cooling effect and cooling efficiency.

[0038] The third water delivery component: Low-temperature cooling water enters the lower die cooling cavity 305 from the third liquid inlet 304b along the third liquid inlet flow channel 304a. The low-temperature cooling water is dispersed and cooled in all directions by the lower die diversion groove 305a in the lower die cooling cavity 305 to achieve the cooling and shaping of the bottom of the bottle cap 10. Then, it rotates one circle along the lower die liquid collection flow channel 305b of the lower die cavity and enters the thread water delivery flow channel to achieve the cooling and shaping of the threaded side wall of the bottle cap 10. At the same time, the low-temperature cooling water is transformed into heated cooling water and finally flows out through the third liquid return flow channel 302. The one-way flow mode of the third water delivery component avoids the problems of uneven flow velocity and flow rate, increases the strength of the parts, improves the cooling effect and cooling efficiency; moreover, it ensures that the cooling area of the cooling water in the lower die liquid collection flow channel 305b extends to the highest point of the threaded side wall of the bottle cap 10, and in the one-way rotating flow area, the cooling efficiency is significantly improved.

[0039] The above description is only a specific implementation of the present invention. However, those skilled in the art should understand that this is only an example. The protection scope of the present invention is defined by the appended claims. Therefore, any equivalent changes made to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A cap-making mold with multi-channel water circulation cooling for the preparation of bottle caps. The bottle cap includes a bottom and a threaded side wall formed around the bottom in its circumferential direction. ； The cap-making mold with multi-channel water circulation cooling includes: an upper mold and a lower mold. An upper mold surface of the upper mold and a lower mold surface of the lower mold cooperate to form a mold cavity for molding the bottle cap. The upper mold further includes: An upper mold body, including a cylindrical tube sleeve and a fixed mounting member, and the fixed mounting member is installed at the upper end of the cylindrical tube sleeve; A cooling module for cooling and shaping the bottle cap in the mold cavity; and An ejection module, including an air flow-assisted ejection structure for assisting in blowing out the bottle cap. It is characterized in that the cooling module includes: A first water circulation assembly arranged at the axis of the cylindrical tube sleeve, which includes: an inner sleeve, an upper mold water isolation sleeve and a joint. The inner sleeve is coaxially arranged in the upper mold water isolation sleeve, and an upper mold cooling cavity is formed at the bottom of the upper mold water isolation sleeve. The upper end of the inner sleeve extends to one end of the fixed mounting member and is connected to the joint. A first liquid inlet channel is formed in the axis of the inner sleeve, and the first liquid inlet channel extends from the joint to the upper mold cooling cavity. A first liquid return channel is formed between the inner wall of the upper mold water isolation sleeve and the outer wall of the inner sleeve. The upper end of the upper mold water isolation sleeve is connected to the fixed mounting member, and a first liquid return port communicating with the first liquid return channel is further provided on the fixed mounting member; and A second water delivery component is arranged circumferentially around the first water delivery component and includes a water distribution sleeve, an outer threaded core sleeve, and an inner threaded core sleeve. The water distribution sleeve is sleeved on the upper part of the upper die water isolation sleeve. A second liquid inlet flow channel and a second liquid return flow channel are arranged in the wall body of the water distribution sleeve. The upper end of the outer threaded core sleeve is matched with the lower end of the upper die water isolation sleeve. A liquid inlet diversion flow channel and a liquid return diversion flow channel communicated with the second liquid inlet flow channel and the second liquid return flow channel are respectively arranged in the wall body of the outer threaded core sleeve. The lower end of the outer threaded core sleeve extends downward to the bottom of the upper die water isolation sleeve. A thread groove is arranged on the outer wall circumference of the outer threaded core sleeve near the bottom of the upper die water isolation sleeve. The inner threaded core sleeve is sleeved on the bottom of the upper die water isolation sleeve and is located between the outer threaded core sleeve and the upper die water isolation sleeve. The upper end of the inner threaded core sleeve is connected to the inner wall of the outer threaded core sleeve. A core cooling flow channel for cooling and shaping the thread side wall of the bottle cap is formed at the position corresponding to the thread groove between the outer side wall of the inner threaded core sleeve and the inner side wall of the outer threaded core sleeve. The core cooling flow channel includes a diversion cavity, a return cavity, and an upper die liquid collection flow channel. The liquid inlet diversion flow channel and the liquid return diversion flow channel are respectively communicated with the diversion cavity and the return cavity. The diversion cavity is communicated with the upper die liquid collection flow channel through a predetermined number of upper die diversion grooves arranged on the outer side wall of the inner threaded core sleeve. The upper die liquid collection flow channel rotates one circle along the outer wall circumference of the inner threaded core sleeve and is then communicated with the return cavity through a predetermined number of upper die return grooves arranged on the outer side wall of the inner threaded core sleeve. The lower die includes a die base and a third water delivery component arranged in the die base. The third water delivery component includes a lower die water isolation sleeve, a lower die pressing sleeve, and a lower die cavity sleeve. The lower die cavity sleeve is located above the die base. A lower die cooling cavity is formed between the upper end of the die base and the outer bottom of the lower die cavity. A third liquid inlet flow channel communicated with the lower die cooling cavity is arranged in the middle of the die base. The lower die water isolation sleeve is arranged circumferentially around the lower die cavity sleeve and forms a spiral water delivery flow channel with the outer side wall of the lower die cavity sleeve. The lower die pressing sleeve is arranged outside the die base and forms a third liquid return flow channel with the lower die water isolation sleeve. One end of the spiral water delivery flow channel is communicated with the lower die cooling cavity, and the other end is communicated with the third liquid return flow channel. A first spring is sleeved at the position where the upper end of the outer threaded core sleeve is matched with the water distribution sleeve.

2. The cap making mold with multi-channel water delivery cooling according to claim 1, characterized in that the lower die cooling cavity includes a predetermined number of lower die diversion grooves extending from the center of the bottom of the lower die cavity sleeve to the periphery and a lower die liquid collection flow channel arranged to rotate one circle along the bottom circumference of the lower die cavity sleeve.

3. The cap making mold with multi-channel water delivery cooling according to claim 1, characterized in that the upper end of the inner threaded core sleeve is threadedly connected to the inner wall of the outer threaded core sleeve.

4. The cap-making mold with multi-channel water-cooling according to claim 1, characterized in that, a second spring is provided between the water distribution sleeve and the cylindrical pipe sleeve.

5. The cap-making mold with multi-channel water-cooling according to claim 1, characterized in that, the cylindrical pipe sleeve is connected to the fixed mounting member by screws.

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