CN112721111A

CN112721111A - Blow mold with self-descaling type external cooling system

Info

Publication number: CN112721111A
Application number: CN202011471329.8A
Authority: CN
Inventors: 王慧萍
Original assignee: Wuhan Linshu Technology Co ltd
Current assignee: Cao Juan
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-04-30

Abstract

The invention discloses a blow mould with a self-descaling external cooling system, which relates to the technical field of blow moulds and comprises a blow mould, wherein the blow mould is formed by closing two half moulds, a cavity is arranged in the blow mould, a cooling system is arranged in the blow mould, the cooling system comprises an external circulating cooling source and a cooling pipeline communicated with the external circulating cooling source, the cooling pipeline is distributed in the blow mould close to the periphery of the cavity in a criss-cross manner, and an elastic pipe is coaxially and fixedly connected with the inner periphery of the cooling pipeline. Scale formation on the surface thereof can be avoided.

Description

Blow mold with self-descaling type external cooling system

Technical Field

The invention relates to the technical field of blow molds, in particular to a blow mold with a self-descaling external cooling system.

Background

In the blow molding process of the parison by the blow mold, the heat of the molten plastic is taken away by the mold, so that the product is cooled and shaped, and the blow molding processing of the product is finished. In this process, the cooling system is not only not critical to the quality of the molded article but also affects the blow molding cycle of the article. In the long-term use of cooling system, can deposit the incrustation scale in the cooling tube, not only influence the velocity of water flow and influence the speed of heat transfer simultaneously to reduce cooling efficiency, influence product quality and production efficiency.

Disclosure of Invention

The invention provides a blow mold with a self-descaling external cooling system, and aims to solve the problem that scale deposits can be accumulated in a cooling pipeline in the long-term use process of the cooling system in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a blow mold with a self-descaling external cooling system comprises a blow mold, wherein the blow mold is formed by combining two half molds, a cavity is formed in the blow mold, a cooling system is arranged in the blow mold and comprises an external circulating cooling source and a cooling pipeline communicated with the external circulating cooling source, the cooling pipeline is distributed in the blow mold close to the periphery of the cavity in a criss-cross manner, the inner periphery of the cooling pipeline is coaxially and fixedly connected with an elastic pipe, the inner periphery of the elastic pipe forms a cooling water circulation channel, a built-in spring is embedded in the elastic pipe along the axial direction, two ends of the built-in spring extend out of the elastic pipe and are electrically connected with conductive electrodes, the conductive electrodes are electrically connected with a control circuit, a power supply source is arranged in the blow mold and is electrically connected with the control circuit, and a thermal expansion ring pipe is fixedly connected between the elastic pipe and the cooling, and a cooling rod is connected to the cooling pipeline, and one end of the cooling rod, which is far away from the cooling pipeline, extends to a position close to a cavity boss in the blow molding mold.

Preferably, the cooling pipes are distributed in the blow mold in a criss-cross manner and are arranged at equal intervals with the inner surface of the inner cavity of the blow mold.

Preferably, the elastic tube has elasticity, the thermal expansion ring tube is made of the existing thermal expansion rubber and expands after being heated, and the maximum expansion radius of the thermal expansion ring tube is larger than the radius of the elastic tube.

Preferably, the built-in spring has conductivity, the control circuit electrically conducts the conductive electrode and outputs pulse current to the built-in spring, and the built-in spring contracts under the action of electromagnetic induction after being electrified.

Preferably, the cooling rod is composed of communicating pipes, and the communicating pipes are U-shaped and are communicated with the cooling pipeline at intervals along the axial direction of the cooling pipeline.

Preferably, the two branch pipes of the communicating pipe are arc-shaped and point to the same position on the cooling pipeline, and the middle part of the two branch pipes extends to the position close to the cavity boss in the blow molding mold.

Compared with the prior art, the invention has the following beneficial effects:

1. when the cooling system of the blow molding mold works, the control circuit outputs pulse current to the built-in spring in the elastic tube, the built-in spring is partially contracted and moves forwards in a contracted state under the action of the pulse current, and the elastic tube is partially contracted and expanded along with the contraction and expansion of the built-in spring, so that scale which is caked on the surface of the elastic tube can be broken, the reduction of heat exchange efficiency caused by the existence of the scale is avoided, meanwhile, the elastic tube generates a disturbing effect on internal water flow in the deformation process, and the formation of the scale on the surface of the elastic tube can be avoided.

2. When the local temperature in the blow molding mould is different, the thermal expansion ring pipe is locally heated and expanded, so that the local bulge of the elastic pipe is pushed, the contact surface of the local part of the elastic pipe and water flow is improved, the local heat exchange effect is increased, and the temperature balance effect of the mould is improved.

3. The cooling rod is arranged in the blow molding die close to the cavity boss, so that effective heat dissipation is favorably carried out on the hot nest which cannot be touched by the longitudinal and transverse cooling pipelines, when heat flow in the communicating pipe forming the cooling rod flows to the cooling pipeline, the thermal expansion ring pipe in the cooling pipeline is heated and expanded until the local cooling pipeline is blocked, so that the cooling water flow is redirected to the communicating pipe, and the heat dissipation effect of the hot nest is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the connection between the built-in spring and the elastic tube according to the present invention;

FIG. 3 is a schematic view of the working deformation of the elastic tube of the present invention;

fig. 4 is a schematic view of the cooling water re-routing communication pipe of the present invention.

In the figure: 1 blow mould, 2 cavities, 3 cooling systems, 4 cooling pipelines, 5 elastic pipes, 51 built-in springs, 511 conductive electrodes, 52 control circuits, 53 power supplies, 6 thermal expansion ring pipes, 7 cooling rods and 71 communicating pipes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-4, a blow mold with a self-descaling external cooling system comprises a blow mold 1, wherein the blow mold 1 is formed by combining two mold halves, and a cavity 2 is formed in the blow mold 1 and used for forming the appearance of a product.

A cooling system 3 is arranged in the blow mold 1, the cooling system 3 comprises an external circulating cooling source and a cooling pipeline 4 communicated with the external circulating cooling source, and the cooling system 3 works in the cooling pipeline 4 through the external circulating cooling source to circulate and take away heat in the blow mold 1.

The cooling pipelines 4 are distributed in the blow molding die 1 in a criss-cross mode and are arranged at equal intervals with the inner surface of the cavity 2 in the blow molding die 1, so that the cavity 2 is uniformly cooled.

An elastic tube 5 is coaxially and fixedly connected with the inner peripheral side of the cooling pipeline 4, a cooling water circulation channel is formed on the inner peripheral side of the elastic tube 5 and used for cooling water to circulate, the elastic tube 5 has elasticity, a built-in spring 51 is embedded in the elastic tube 5 along the axial direction, two ends of the built-in spring 51 extend out of the elastic tube 5 and are electrically connected with a conductive electrode 511, the conductive electrode 511 is electrically provided with a control circuit 52, a power supply 53 is installed in the blow molding die 1, the power supply 53 is electrically connected with the control circuit 52, the built-in spring 51 has conductivity, the control circuit 52 is electrically connected with the conductive electrode 511 and outputs pulse current to the built-in spring 51, when the built-in spring is electrified, each coil of the spring is equivalent to one coil, the coils are electrified to generate induced magnetic fields, the built-in magnetic fields formed by the plurality of coils attract each other.

Along with the contraction and the expansion of the built-in spring 51, the elastic tube 5 is locally contracted and expanded to avoid the water scale from caking on the inner surface of the elastic tube 5, the reduction of the heat exchange efficiency caused by the water scale is avoided, meanwhile, the elastic tube 5 generates a disturbing effect on the internal water flow in the deformation process, and the water scale can be prevented from being formed on the surface of the elastic tube.

Fixedly connected with thermal expansion ring pipe 6 between elastic tube 5 and cooling tube 4, thermal expansion ring pipe 6 adopts current thermal expansion rubber to make and expand after being heated, and its maximum expansion radius is greater than elastic tube 5 pipe radius, and when local temperature had the difference in the mould, thermal expansion ring pipe 6 local heating expansion thereby improves local and rivers contact surface increase local heat transfer effect, improves the temperature balance effect of mould.

Be connected with cooling rod 7 on cooling tube 4, cooling rod 7 is kept away from cooling tube 4 one end and is extended to be close to 2 bosss of die cavity in the blow mold 1, thereby do benefit to and move about effectively dispelling the heat to the hot nest that cooling tube 4 can not touch, cooling rod 7 has communicating pipe 71 to constitute, communicating pipe 71 is U type and both ends interval along cooling tube 4 axial intercommunication on cooling tube 4, two branch pipes of communicating pipe 71 are arc and same department on directional cooling tube 4, the middle part extends to and is close to 2 bosss of die cavity in the blow mold 1, make the thermal expansion ring canal 6 of this department in cooling tube 4 be heated the inflation when the hot current gushes to cooling tube 4 in communicating pipe 71, until blockking up this local cooling tube 4, thereby make cooling water flow change the way and walk communicating pipe 71, thereby heat dissipation effect of heating nest.

The principles of the present invention are now described as follows:

when the cooling system 3 of the blow molding mold 1 works, the cooling system 3 works in the cooling pipeline 4 through an external circulating cooling source to circulate and take away heat in the blow molding mold 1, so that the cooling effect is improved for the cavity 2 in the blow molding mold 1, the control circuit 52 starts to work, the power supply 53 supplies power to the control circuit 52 at the moment, the control circuit 52 is electrically connected with the conductive electrode 511 and outputs pulse current to the built-in spring 51, the built-in spring 51 is locally contracted and moves forwards in a contracted state under the action of the pulse current, and the elastic tube 5 wrapping the built-in spring 51 is locally contracted and expanded along with the contraction and expansion of the built-in spring 51, so that the water scale is prevented from being agglomerated on the inner surface of the elastic tube 5, the reduction of the heat exchange efficiency caused by the water scale is avoided, meanwhile, the elastic tube 5 generates a disturbing effect on;

when there is the difference in local temperature in blow molding die 1, the local thermal expansion ring pipe 6 is heated the inflation thereby it improves elasticity pipe 5 part and rivers contact surface with the local heat transfer effect of increase, improve the temperature balance effect of mould, be connected with cooling rod 7 on the cooling tube 4 simultaneously, cooling rod 7 is kept away from cooling tube 4 one end and is extended to blow molding die 1 in and be close to die cavity 2 boss department, thereby do benefit to and move about effectively dispelling the heat to the hot nest that cooling tube 4 can not touch, make the thermal expansion ring pipe 6 of this department in the cooling tube 4 be heated the inflation when the communicating pipe 71 surge of constituteing cooling rod 7 flows to cooling tube 4, until blockking up this local cooling tube 4, thereby make cooling water flow change the way and walk communicating pipe 71, thereby the radiating effect of heating nest.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A blow mold with a self-descaling type external cooling system comprises a blow mold (1), wherein the blow mold (1) is formed by closing two half molds, and is characterized in that a cavity (2) is formed in the blow mold (1), a cooling system (3) is arranged in the blow mold (1), the cooling system (3) comprises an external circulating cooling source and a cooling pipeline (4) communicated with the external circulating cooling source, an elastic pipe (5) is coaxially and fixedly connected to the inner peripheral side of the cooling pipeline (4), a cooling water circulation channel is formed on the inner peripheral side of the elastic pipe (5), a built-in spring (51) is embedded in the elastic pipe (5) along the axial direction, two ends of the built-in spring (51) extend out of the elastic pipe (5) and are electrically connected with a conductive electrode (511), the conductive electrode (511) is electrically connected with a control circuit (52), a power supply (53) is installed in the blow mold (1), the power supply (53) is electrically connected with the control circuit (52), a thermal expansion ring pipe (6) is fixedly connected between the elastic pipe (5) and the cooling pipeline (4), the cooling pipeline (4) is connected with a cooling rod (7), and one end, far away from the cooling pipeline (4), of the cooling rod (7) extends to a boss, close to the cavity (2), in the blow molding die (1).

2. The blow mold with the self-descaling external cooling system according to claim 1, wherein the cooling pipes (4) are distributed in the blow mold (1) in a criss-cross manner and are all arranged at equal intervals with the inner surface of the cavity (2) in the blow mold (1).

3. The blow mold with self-descaling external cooling system according to claim 1, wherein the elastic tube (5) has elasticity, the thermal expansion ring tube (6) is made of existing thermal expansion rubber and expands after being heated, and the maximum expansion radius is larger than the tube radius of the elastic tube (5).

4. The blow mold with the self-descaling external cooling system according to claim 1, wherein the built-in spring (51) is electrically conductive, and the control circuit (52) electrically conducts the conductive electrode (511) and outputs a pulse current to the built-in spring (51), wherein the built-in spring (51) contracts under electromagnetic induction after being electrified.

5. The blow mold with the self-descaling external cooling system according to claim 1, wherein the cooling rod (7) is composed of a communication pipe (71), the communication pipe (71) is U-shaped, and two ends of the communication pipe are axially communicated with the cooling pipeline (4) at intervals along the cooling pipeline (4).

6. The blow mold with the self-descaling external cooling system according to claim 5, wherein the two branch pipes of the communicating pipe (71) are arc-shaped and point to the same position on the cooling pipeline (4), and the middle part of the communicating pipe extends to the position inside the blow mold (1) close to the boss of the cavity (2).