CN117445361A - Blow molding die for plastic container and blow molding equipment - Google Patents

Abstract

The application discloses a blow molding die and blow molding equipment for a plastic container, wherein the blow molding die comprises a main die assembly, the main die assembly is used for limiting a first cavity, and the main die assembly is used for shaping a plastic parison into a container blank in the first cavity; the positioning assembly is suitable for positioning the container rough blank, and the positioned container rough blank is suitable for cutting off the water gap material by the edge cutting mechanism; a cooling assembly for cooling the container preform to form a plastic container from the container preform; the transfer mechanism group is movably arranged between the first position and the second position along the first direction. Therefore, the transfer mechanism group drives the main die assembly, the positioning assembly and the cooling assembly to reciprocate between the first position and the second position, so that the extrusion blow molding, the positioning cutting and the cooling shaping of the plastic container can be realized by the blow molding die.

Description

Blow molding die for plastic container and blow molding equipment

Technical Field

The present application relates to the field of plastic processing technology, and in particular, to a blow mold for a plastic container and a blow molding apparatus having the same.

Background

Blow molding is a process for manufacturing hollow plastic articles (e.g., plastic containers such as plastic barrels or plastic bottles) by injecting molten plastic into a blow mold and then applying air pressure inside the blow mold to expand the plastic into a predetermined shape.

In the related art, in order to make the processed plastic product meet the size requirement, in the process of using the blow molding equipment to blow-mold the product, the plastic container is immediately transferred out of the blow molding equipment after the water gap material is removed, and the heat of the plastic container is not completely dissipated and cooled because of the short moving time of the plastic container, so that the plastic container cannot be completely shaped, and the processed plastic container cannot completely meet the related size requirement, thereby reducing the qualification rate of the product.

Disclosure of Invention

In order to enable the manufactured products processed by the blow molding mold to meet the related dimensional requirements and improve the qualification rate of products, the application provides a blow molding mold for plastic containers.

The present application further provides a blow molding apparatus.

The application provides a blow mould for plastic container adopts following technical scheme:

a blow mold for plastic containers, comprising:

A main mold assembly defining a first cavity, the main mold assembly adapted to hold and contain a plastic parison and configured to shape the plastic parison into a container preform within the first cavity; the positioning assembly is suitable for acquiring and positioning the container blank, the positioning assembly is suitable for being arranged opposite to the edge cutting mechanism, and the container blank positioned by the positioning assembly is suitable for being cut off a water gap material by the edge cutting mechanism; a cooling assembly adapted to take the container blank from which nozzle material has been cut, and for cooling the container blank to form the container blank into the plastic container; the main die assembly, the positioning assembly and the cooling assembly are sequentially arranged along a first direction of the blow molding die;

the transfer mechanism group is movably arranged between the first position and the second position along the first direction, the main mold assembly clamps and holds the plastic parison at the first position, the positioning assembly acquires and positions the container rough blank of the nozzle material to be cut, and the cooling assembly acquires the container rough blank of the nozzle material to be cut; in the second position, the main mold assembly cooperates with the blowing needle to shape the plastic parison into a container preform, the positioning assembly cooperates with the trimming mechanism to remove gate material from the container preform, and the cooling assembly cools the container preform to form the container preform into the plastic container.

Through adopting above-mentioned technical scheme, drive main mould subassembly, locating component and cooling component through transfer mechanism group and reciprocate between first position and second position, can make the blowing mould realize extrusion blow molding, location cutting and the cooling design of plastic container to this continuous production qualified plastic container, compare with prior art, can effectually reduce plastic container's temperature, avoid plastic container to produce the deformation as far as possible, thereby improved plastic container's qualification rate.

Preferably, the transfer mechanism group comprises a first transfer mechanism and a second transfer mechanism, the first transfer mechanism and the second transfer mechanism are oppositely arranged along a second direction of the blow mold, and the first transfer mechanism and the second transfer mechanism are suitable for opposite or reverse movement along the second direction, wherein the first direction and the second direction are mutually perpendicular; in the first position, the plastic parison is made to extend into the main mold assembly and the container blank to be cut out of the gate material is made to extend into the positioning assembly, and the container blank to be cut out of the gate material is made to extend into the cooling assembly, and the plastic parison is made to be held by the main mold assembly and the positioning assembly and the container blank to be cut out of the gate material is made to hold the container blank to be cut out of the gate material by the first and second transfer mechanisms in opposite directions; in the second position, the first transfer mechanism and the second transfer mechanism are moved reversely along the second direction, so that the main die assembly releases the container rough blank of the nozzle material to be cut, the positioning assembly releases the container rough blank of the nozzle material to be cut, and the cooling assembly releases the plastic container.

By adopting the technical scheme, as the first transfer mechanism and the second transfer mechanism are oppositely arranged along the second direction of the blow molding die, the first transfer mechanism and the second transfer mechanism are suitable for oppositely moving along the second direction so as to enable the main die assembly to clamp the plastic parison, enable the positioning assembly to position and clamp the container rough blank, enable the cooling assembly to clamp the container rough blank of the cut water gap material, enable the main die assembly to release the container rough blank of the water gap material to be cut through the first transfer mechanism and the second transfer mechanism, enable the positioning assembly to release the container rough blank of the cut water gap material, and enable the cooling assembly to release the plastic container.

Preferably, in the first direction, a distance between the main mold assembly and the positioning assembly is L1, a distance between the positioning assembly and the cooling assembly is L2, and a distance between the first position and the second position is L3, where L1, L2 and L3 satisfy the relation: l1=l2=l3.

Through adopting above-mentioned technical scheme, transfer mechanism group drives the main mould subassembly and carries the plastics parison that will acquire from the first position to the second position after, and when the locating component moved to the first position, the locating component can acquire the container thick embryo by plastics parison processing formation accurately. And after the transport mechanism group drives the positioning assembly to transport the obtained container rough blank from the first position to the second position, when the cooling assembly moves to the first position, the cooling assembly can accurately obtain the container rough blank from which the water gap material is cut off, so that the positioning accuracy of the plastic container in the transport process is improved, the probability of damage to the product caused by inaccurate positioning is reduced, and the qualification rate of the plastic container can be improved.

Preferably, the main mold assembly comprises a first main mold half and a second main mold half, the first main mold half is fixed on the first transfer mechanism, the second main mold half is fixed on the second transfer mechanism, the first main mold half and the second main mold half are oppositely arranged along the second direction, the first main mold half and the second main mold half jointly define the first cavity, and the first main mold half is suitable for being separated from or stopped against the second main mold half; the first main mold half shell is provided with a positioning groove, and the second main mold half shell is provided with a positioning protrusion, and the positioning protrusion is suitable for extending into the positioning groove.

Through adopting above-mentioned technical scheme, drive first main mould half shell through first transfer mechanism and follow blow mould's second direction motion, and second transfer mechanism drives second main mould half shell and follow blow mould's second direction motion, can make first main mould half shell and second main mould half shell separate or stop, through the cooperation of location arch and positioning groove, improved the accuracy of first main mould half shell and second main mould half shell in the compound die in-process.

Preferably, the first main mold half shell and the second main mold half shell each comprise a first molding section, a second molding section, a mounting seat and a propping piece, the second molding sections are mounted on the corresponding mounting seats, one ends of the propping pieces are connected and matched with the corresponding first molding sections, the other ends of the propping pieces are connected and matched with the corresponding mounting seats, the mounting seats are driven to move close to or far away from the first molding sections through telescopic deformation of the propping pieces in the third direction of the blow molding mold, and the first direction, the second direction and the third direction are perpendicular to each other.

Through adopting above-mentioned technical scheme, through making the mount pad drive second shaping section keep away from first shaping section motion, can increase the size of first die cavity in the third direction of blowing mould, the clearance increase between the inner wall of the container thick embryo at the third direction of blowing mould and first die cavity, the container thick embryo drops the separation in the blowing mould more easily to can avoid the container thick embryo to be difficult to remove from the main mould subassembly as far as possible, and then can ensure that blowing equipment can normally work.

Preferably, the positioning assembly comprises a first positioning half-shell and a second positioning half-shell, wherein the first positioning half-shell is fixed on the first transfer mechanism, the second positioning half-shell is fixed on the second transfer mechanism, the first positioning half-shell and the second positioning half-shell jointly define a positioning cavity matched with the appearance shape of the container blank, and the positioning cavity is used for positioning the container blank.

Through adopting above-mentioned technical scheme, through making the first location semi-shell be close to the inner wall of container rough embryo and the appearance shape matching of container rough embryo, and make the second location semi-shell be close to the inner wall of container rough embryo and the appearance shape matching of container rough embryo, can make the container rough embryo inlay in locating cavity accurately.

Preferably, the positioning assembly further comprises a first motion seat, a first guide piece, a second motion seat and a second guide piece, one end of the first guide piece is arranged on the first transfer mechanism in a penetrating manner, the first guide piece extends along the second direction, and the first motion seat is fixed at the other end of the first guide piece; one end of the second guide piece is arranged on the second transfer mechanism in a penetrating mode, the second guide piece extends along the second direction, the second moving seat is fixed to the other end of the second guide piece, the first moving seat and the second moving seat are opposite and are spaced to form a clamping gap, the clamping gap is suitable for the penetration of a water gap material of a container blank, and one of the first moving seat and the second moving seat is driven by the edge cutting mechanism to push the other one to move along the second direction.

Through adopting above-mentioned technical scheme, promote first motion seat and second motion seat along blow mould's second direction motion through cutting edge mechanism, first motion seat and second motion seat can make take place the dislocation between mouth of a river material of container crude embryo and the container crude embryo, and first motion seat and second motion seat can tear the mouth of a river material of container crude embryo from the container crude embryo to realize getting rid of the technological effect of the mouth of a river material of container crude embryo.

Preferably, the cooling assembly comprises a plurality of clamping pieces, at least one clamping piece is arranged on the first transfer mechanism, at least one clamping piece is arranged on the second transfer mechanism, and the plurality of clamping pieces are used for jointly clamping the container blanks; the cooling assembly further comprises a first shaping piece and a second shaping piece which are spaced apart along the third direction of the blow molding die, the first shaping piece is suitable for being abutted against the top wall of the container blank and used for cooling and shaping the top wall of the container blank, the second shaping piece is suitable for being abutted against the bottom wall of the container blank and used for cooling and shaping the bottom wall of the container blank, the top wall of the first shaping piece is further provided with a first avoiding opening, the first avoiding opening is opposite to the opening of the container blank, and the first avoiding opening is used for avoiding the blast piece.

Through adopting above-mentioned technical scheme, through holder centre gripping container thick embryo, can make the container thick embryo by spacing in the space between a plurality of holders, because second setting piece, second setting piece all stop with the plastic container and support the cooperation, can prevent the plastic container effectively and warp, guaranteed the basic outward appearance requirement of plastic container, improved the qualification rate of plastic container.

Preferably, a first cooling pipeline suitable for cooling medium flow is defined in the first shaping piece, and the first shaping piece is provided with at least one first water inlet and at least one first water outlet, and the first water inlet and the first water outlet are communicated with the first cooling pipeline; the second shaping piece is internally provided with a second cooling pipeline suitable for flowing of cooling medium, and is provided with at least one second water inlet and at least one second water outlet, and the second water inlet and the second water outlet are communicated with the second cooling pipeline.

Through adopting above-mentioned technical scheme, the cooling medium in the first setting member exchanges heat with the roof of plastic container in order to reduce the roof temperature of plastic container, and the cooling medium in the second setting member exchanges heat with the diapire of plastic container in order to reduce the diapire temperature of plastic container, so the heat dissipation time of plastic container that can shorten avoids plastic container to try hard because expend with heat and contract with cold leads to shape and size to change, and then promotes the qualification rate of plastic container.

The application provides a blowing equipment adopts following technical scheme:

a blow molding apparatus comprising: the blow molding die comprises a main die assembly, a positioning assembly, a cooling assembly and a transfer mechanism group, wherein the main die assembly, the positioning assembly and the cooling assembly are all fixed on the transfer mechanism group, and the transfer mechanism group is movably arranged between a first position and a second position; an extrusion-blow mechanism having a discharge die for extruding hot melt plastic into a plastic parison and a blow pin for expanding the plastic parison into a container preform within the first cavity of the main die assembly; the edge cutting mechanism is suitable for being arranged opposite to the positioning assembly and is used for cutting the water gap material of the container rough blank; a cold supply for providing a cooling medium to the cooling assembly; the driving mechanism is used for driving the transfer mechanism group to reciprocate between the first position and the second position.

Through adopting above-mentioned technical scheme, when blowing equipment processes plastic container, drive main mould subassembly, locating component and cooling component through transfer mechanism group and reciprocate between first position and second position, can make the blowing mould realize that plastic container's extrusion blows shaping, location cuts and cooling design to this continuous production qualified plastic container, compare with prior art, can effectually reduce plastic container's temperature, avoid plastic container to produce the deformation as far as possible, thereby improved plastic container's qualification rate.

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

1. the transfer mechanism group drives the main die assembly, the positioning assembly and the cooling assembly to reciprocate between the first position and the second position, so that the extrusion blow molding, positioning cutting and cooling shaping of the plastic container can be realized by the blow molding die, and the qualified plastic container is continuously produced.

2. The cooling medium in the first shaping piece exchanges heat with the top wall of the plastic container to reduce the temperature of the top wall of the plastic container, and the cooling medium in the second shaping piece exchanges heat with the bottom wall of the plastic container to reduce the temperature of the bottom wall of the plastic container, so that the heat dissipation time of the plastic container can be shortened, the plastic container is prevented from changing in shape and size due to expansion caused by heat and contraction caused by cold as much as possible, and the qualification rate of the plastic container is improved.

Drawings

FIG. 1 is a schematic illustration of a blow mold according to an embodiment of the present application;

FIG. 2 is a schematic view of a blow mold at another angle according to an embodiment of the present application;

FIG. 3 is a schematic view of a blow mold at another angle according to an embodiment of the present application;

FIG. 4 is a side view of a blow mold according to an embodiment of the present application;

FIG. 5 is a cross-sectional view of a blow mold according to an embodiment of the present application;

FIG. 6 is a cross-sectional view of a portion of the structure of a blow mold according to an embodiment of the present application;

FIG. 7 is a cross-sectional view of a first forming member according to an embodiment of the present application;

fig. 8 is a cross-sectional view of a second forming member according to an embodiment of the present application.

Reference numerals illustrate:

100. a blow molding die; 110. a plastic container;

10. a master mold assembly; 101. a first pinch-off portion; 102. a second pinch-off portion; 103. a first cavity; 104. a first main mold half; 1041. a positioning groove; 105. a second main mold half; 1051. positioning the bulge;

106. a first forming section; 107. a second molding section; 108. a mounting base;

20. a positioning assembly; 201. a first positioning half-shell; 202. a second positioning half-shell; 2021. a positioning cavity;

203. A first motion seat; 204. a first guide; 205. a second motion seat; 206. a second guide; 207. a positioning piece;

30. a cooling assembly; 301. a clamping member; 302. a first molding member; 303. a second shaping piece; 3031. a first avoidance port;

304. a first water inlet; 305. a first water outlet; 306. a first cooling duct; 307. a second water inlet; 308. a second water outlet; 309. a second cooling duct;

40. a transport mechanism group; 401. a first transfer mechanism; 402. a second transfer mechanism; 403. a main board; 404. a sub-plate; 405. and (5) installing a block.

Detailed Description

The present application is described in further detail below in conjunction with fig. 1-8.

The embodiment of the application discloses a blow molding mold 100 for a plastic container 110, the blow molding mold 100 is arranged in a blow molding device, the blow molding mold 100 is used for molding the plastic container 110, the plastic container 110 can be a plastic barrel or a plastic bottle, and the application is described below with the plastic container 110 as the plastic barrel.

Referring to fig. 1-8, a blow mold 100 according to an embodiment of the present application includes: a master mold assembly 10, a positioning assembly 20, a cooling assembly 30, and a transfer mechanism assembly 40. The main mould assembly 10 defines a first mould cavity 103, the shape and size of the first mould cavity 103 being settable according to the shape and size of the plastic container 110, the main mould assembly 10 being adapted to hold and contain a plastic parison, and the main mould assembly 10 being adapted to shape the plastic parison into a container preform within the first mould cavity 103, wherein the plastic parison is formed by extrusion of hot melt plastic from a discharge die of a blow moulding apparatus, and a blow pin of the blow moulding apparatus being adapted to blow-mould the plastic parison into a container preform within the first mould cavity 103.

The main mold assembly 10 includes a first pinch-off portion 101 and a second pinch-off portion 102, the first pinch-off portion 101 being located at an upper end of the main mold assembly 10, the second pinch-off portion 102 being located at a lower end of the main mold assembly 10, the first pinch-off portion 101 and the second pinch-off portion 102 being capable of pinching a plastic parison such that the upper and lower ends of the plastic parison are closed according to a shape of a plastic container. Specifically, the length dimension of the tubular plastic parison extruded by the discharge die head is greater than the length dimension of the first cavity 103, when the parison reaches the preset length dimension, the first parison clamping portion 101 and the second parison clamping portion 102 can clamp the plastic parison, the inner wall of the plastic parison is extruded and bonded to seal the plastic parison, and the upper end and the lower end of the plastic parison are formed with the gate material, and it should be noted that the length direction of the first cavity may refer to the up-down direction in fig. 2.

The positioning component 20 is suitable for acquiring and positioning the container blank, the positioning component 20 is suitable for being arranged opposite to a trimming mechanism of the blow molding equipment, and the container blank positioned by the positioning component 20 is suitable for being cut off a water gap material by the trimming mechanism through the cooperation of the positioning component 20 and the trimming mechanism.

The cooling assembly 30 is adapted to obtain a container blank from which a nozzle material is cut, and the cooling assembly 30 is used to cool the container blank to form the container blank into the plastic container 110, and the main mold assembly 10, the positioning assembly 20, and the cooling assembly 30 are sequentially arranged along a first direction of the blow mold 100, where it should be noted that the first direction of the blow mold 100 may refer to a left-right direction of fig. 2. The main mold assembly 10, the positioning assembly 20 and the cooling assembly 30 are all fixed to a transfer mechanism group 40, and the transfer mechanism group 40 is movably disposed between a first position and a second position along a first direction of the blow mold 100, and the transfer mechanism group 40 reciprocates between the first position and the second position along the first direction of the blow mold 100 when driven by a driving mechanism of the blow molding apparatus.

The transfer mechanism group 40 drives the main mold assembly 10, the positioning assembly 20 and the cooling assembly 30 to move away from the discharging die head of the blow molding equipment when moving from the first position to the second position, and the transfer mechanism group 40 drives the main mold assembly 10, the positioning assembly 20 and the cooling assembly 30 to move close to the discharging die head of the blow molding equipment when moving from the second position to the first position, and in the first position, the main mold assembly 10 clamps and holds the plastic parison, the positioning assembly 20 acquires and positions the container blank of the nozzle material to be cut, and the cooling assembly 30 acquires the container blank of the nozzle material to be cut. The transfer set 40 is then moved from the first position to a second position in which the master mold assembly 10 cooperates with the blowing needle to shape the plastic parison into a container parison, the positioning assembly 20 cooperates with the trimming mechanism to remove gate material from the container parison, and the cooling assembly 30 cools the container parison to form the container parison into the plastic container 110. And, the transfer mechanism assembly 40 is moved from the second position to the first position, thereby completing one processing cycle of the blow mold 100, and the blow mold 100 can continuously process the plastic container 110 by reciprocating the transfer mechanism assembly 40 between the first position and the second position.

Therefore, the transfer mechanism group 40 drives the main die assembly 10, the positioning assembly 20 and the cooling assembly 30 to reciprocate between the first position and the second position, so that the extrusion molding, positioning cutting and cooling shaping of the plastic container 110 can be realized by the blow molding die 100, and the qualified plastic container 110 is continuously produced.

Referring to fig. 1, 2 and 4, in some embodiments of the present application, the transfer mechanism set 40 includes a first transfer mechanism 401 and a second transfer mechanism 402, where the first transfer mechanism 401 and the second transfer mechanism 402 are disposed opposite to each other along a second direction of the blow mold 100, and it should be noted that the first direction and the second direction of the blow mold 100 are disposed perpendicular to each other, and the second direction of the blow mold 100 may refer to a left-right direction of fig. 4, and the first direction and the second direction of the blow mold 100 are perpendicular to each other. The first and second transfer mechanisms 401, 402 are adapted to move in opposite or opposite directions along the second direction.

In the first position, the first transfer mechanism 401 and the second transfer mechanism 402 are moved reversely along the second direction of the blow mold 100, the first transfer mechanism 401 and the second transfer mechanism 402 are separated from each other to form a gap, and the main mold assembly 10, the positioning assembly 20 and the cooling assembly 30 are separated along the second direction of the blow mold 100 to form an avoiding gap, so that the plastic parison can be stretched into the main mold assembly 10, the container blank of the nozzle material to be cut can be stretched into the positioning assembly 20, and the container blank of the nozzle material to be cut can be stretched into the cooling assembly 30.

And, through the first transfer mechanism 401 and the second transfer mechanism 402 moving oppositely along the second direction, the first transfer mechanism 401 and the second transfer mechanism 402 approach each other, the gap width between the first transfer mechanism 401 and the second transfer mechanism 402 is reduced, the main mold assembly 10, the positioning assembly 20 and the cooling assembly 30 are all folded along the second direction of the blow mold 100, so that the main mold assembly 10 can clamp the plastic parison, the positioning assembly 20 can position and clamp the container blank, and the cooling assembly 30 can clamp the container blank of the cut nozzle material.

After the transfer mechanism group 40 moves from the first position to the second position, the plastic parison in the main mold assembly 10 is extruded and blown by the blowing device, the trimming mechanism of the blowing device cuts off the water gap of the container blank, the cooling assembly 30 of the blowing device cools and shapes the container blank, in the second position, the first transfer mechanism 401 and the second transfer mechanism 402 are separated from each other by moving the first transfer mechanism 401 and the second transfer mechanism 402 in the second direction in the opposite direction, the gap width between the first transfer mechanism 401 and the second transfer mechanism 402 is increased, and the main mold assembly 10, the positioning assembly 20 and the cooling assembly 30 are separated along the second direction of the blowing mold 100 to form an avoiding gap, so that the main mold assembly 10 can release the container blank of the water gap material to be cut off, the positioning assembly 20 can release the container blank of the cut water gap material, and the cooling assembly 30 can release the plastic container 110.

Referring to fig. 1 and 2, in some embodiments of the present application, in a first direction (left-right direction of fig. 2) of the blow mold 100, a spacing distance between the main mold assembly 10 and the positioning assembly 20 is L1, a spacing distance between the positioning assembly 20 and the cooling assembly 30 is L2, and a spacing distance between the first position and the second position is L3, where L1, L2, and L3 satisfy the relationship: l1=l2=l3. That is, the distance between any two adjacent components (i.e., the main mold assembly 10, the positioning assembly 20 and the cooling assembly 30) on the transfer mechanism assembly 40 is equal to the distance between the first position and the second position, and after the transfer mechanism assembly 40 drives the main mold assembly 10 to transfer the obtained plastic parison from the first position to the second position, when the positioning assembly 20 moves to the first position, the positioning assembly 20 can accurately obtain the container blank formed by processing the plastic parison. And, after the transport mechanism group 40 drives the positioning assembly 20 to transport the obtained container rough blank from the first position to the second position, when the cooling assembly 30 moves to the first position, the cooling assembly 30 can accurately obtain the container rough blank from which the water gap material is cut, so that the positioning accuracy of the plastic container 110 in the transport process is improved, the probability of damage to the product due to inaccurate positioning is reduced, and the qualification rate of the plastic container 110 can be improved.

Referring to fig. 1, 4 and 5, in some embodiments of the present application, the main mold assembly 10 includes a first main mold half 104 and a second main mold half 105, where the first main mold half 104 is fixed to a first transfer mechanism 401, the second main mold half 105 is fixed to a second transfer mechanism 402, the first main mold half 104 and the second main mold half 105 are disposed opposite to each other along a second direction of the blow mold 100, the first main mold half 104 and the second main mold half 105 together define a first cavity 103, the first transfer mechanism 401 drives the first main mold half 104 to move along the second direction of the blow mold 100, and the second transfer mechanism 402 drives the second main mold half 105 to move along the second direction of the blow mold 100, so that the first main mold half 104 and the second main mold half 105 can be separated or stopped, when the first main mold half 104 and the second main mold half 105 are separated, the first main mold half 104 and the second main mold half 105 can form a relief gap, and the first preform can stretch into the first cavity 103, and the first preform can be moved out of the rough container. When the first main mold half 104 and the second main mold half 105 are stopped, the first main mold half 104 and the second main mold half 105 can clamp the plastic parison.

Also, the first main mold half 104 has a positioning groove 1041, and the second main mold half 105 has a positioning protrusion 1051, and the positioning protrusion 1051 protrudes into the positioning groove 1041. Specifically, the positioning groove 1041 may be configured as a cylindrical guide sleeve, and the positioning protrusion 1051 may be configured as a cylindrical guide post, so that the accuracy of the first main mold half 104 and the second main mold half 105 in the mold closing process is improved by the plug-in fit of the guide post and the guide sleeve.

Referring to fig. 1, 3, 4 and 6, in some embodiments of the present application, the main mold assembly 10 further includes a first molding segment 106, a second molding segment 107, a mounting base 108 and a top support, wherein the second molding segment is mounted on the corresponding mounting base 108, and one end of the top support is in connection engagement with the corresponding first molding segment 106, and the other end of the top support is in connection engagement with the corresponding mounting base 108, e.g., the second molding segment of the first main mold half 104 is mounted on the mounting base 108 of the first main mold half 104, and one end of the top support of the first main mold half 104 is in connection engagement with the first molding segment 106 of the first main mold half 104, and the other end of the top support of the first main mold half 104 is in connection engagement with the mounting base 108 of the first main mold half 104. In some specific embodiments, the top struts may be configured as air cylinders, hydraulic cylinders, or electric struts, or the like.

Along the third direction of the blow molding mold 100, the mounting seat 108 drives the second molding section 107 to move close to or far away from the first molding section 106 through the expansion and contraction deformation of the propping piece, wherein the first direction, the second direction and the third direction are perpendicular to each other, the third direction of the blow molding mold 100 can refer to the up-down direction in fig. 2, after the plastic parison forms a container parison in the blow molding mold 100, the size of the first cavity 103 in the third direction of the blow molding mold 100 can be increased by driving the mounting seat 108 to move away from the first molding section 106, and the gap between the third direction of the blow molding mold 100 and the inner wall of the first cavity 103 is increased, so that the container parison is easier to fall off and separate from the blow molding mold 100, and the container parison can be prevented from being unable to be removed from the main mold assembly 10 as much as possible, and normal operation of the blow molding apparatus can be ensured.

Referring to fig. 1 and 3, in some embodiments of the present application, the positioning assembly 20 includes a first positioning half-shell 201 and a second positioning half-shell 202, the first positioning half-shell 201 being secured to a first transfer mechanism 401, the second positioning half-shell 202 being secured to a second transfer mechanism 402, the first positioning half-shell 201 and the second positioning half-shell 202 together defining a positioning cavity 2021 that matches the exterior shape of the container blank, the positioning cavity 2021 being used for positioning of the container blank. Wherein, the first positioning half shell 201 and the second positioning half shell 202 are both suitable for being abutted against the outer peripheral wall of the container blank, and the container blank can be accurately embedded in the positioning cavity 2021 by matching the inner wall of the first positioning half shell 201 close to the container blank with the appearance shape of the container blank and matching the inner wall of the second positioning half shell 202 close to the container blank with the appearance shape of the container blank.

The positioning assembly 20 further comprises a first moving seat 203, a first guide 204, a second moving seat 205 and a second guide 206, wherein one end of the first guide 204 is arranged through the first transfer mechanism 401, the first guide 204 extends along the second direction of the blow mold 100, the first moving seat 203 is fixed at the other end of the first guide 204, the first guide 204 can guide the first moving seat 203, and the first moving seat 203 can move along the second direction of the blow mold 100.

One end of the second guide member 206 is disposed through the second transfer mechanism 402, and the second guide member 206 extends along the second direction of the blow mold 100, and the second moving seat 205 is fixed to the other end of the second guide member 206, where the second guide member 206 can guide the second moving seat 205, and the second moving seat 205 can move along the second direction of the blow mold 100. The first moving seat 203 and the second moving seat 205 are opposite and spaced apart to form a clamping gap, the clamping gap is suitable for the penetration of the nozzle material of the container blank, and one of the first moving seat 203 and the second moving seat 205 pushes the other to move along the second direction of the blow mold 100 when driven by the edge cutting mechanism. That is, when the first moving seat 203 is driven by the trimming mechanism, the first moving seat 203 pushes the second moving seat 205 to move in the second direction of the blow mold 100, or when the second moving seat 205 is driven by the trimming mechanism, the second moving seat 205 pushes the first moving seat 203 to move in the second direction of the blow mold 100.

Wherein the first motion seat 203 and/or the second motion seat 205 may be configured as a rectangular motion seat with a cutter, the first guide 204 may be configured as a plurality of guide bars parallel to each other, and the second guide 206 may be configured as a plurality of guide bars parallel to each other. The trimming mechanism may be configured as an air cylinder, a hydraulic cylinder, an electric brace, or the like, when the gate material of the container blank stretches into the clamping gap, and the gate material of the container blank is clamped between the first moving seat 203 and the second moving seat 205, the first moving seat 203 and the second moving seat 205 are pushed to move along the second direction of the blow mold 100 by the trimming mechanism, the gate material of the container blank and the container blank can be dislocated by the first moving seat 203 and the second moving seat 205, and the gate material of the container blank can be torn from the container blank by the first moving seat 203 and the second moving seat 205, so that the technical effect of removing the gate material of the container blank is achieved.

Further, the positioning assembly 20 further includes a restoring member, where the restoring member is used to drive the first moving seat 203 and the second moving seat 205 to restore to the middle, in some specific embodiments, the restoring member may be a coil spring, where the coil spring is sleeved on the outer side of the guide rod, and the coil spring is supported between the first moving seat 203 and the first transferring mechanism 401, and/or supported between the second moving seat 205 and the second transferring mechanism 402, and the elastic force generated by the coil spring can drive the first moving seat 203 and the second moving seat 205 to restore to the middle when the first moving seat 203 and the second moving seat 205 are driven by the edge cutting mechanism.

Referring to fig. 1, 2, 3, 7, and 8, in some embodiments of the present application, the cooling assembly 30 includes a plurality of clamps 301, which may be configured as jaws. At least one clamping member 301 is disposed on the first transferring mechanism 401, and at least one clamping member 301 is disposed on the second transferring mechanism 402, where the plurality of clamping members 301 are configured to jointly clamp the container blank, for example, in the embodiment shown in fig. 1, the first transferring mechanism 401 is provided with two clamping members 301, the two clamping members 301 fixed on the first transferring mechanism 401 are disposed at intervals along the third direction of the blow mold 100, the second transferring mechanism 402 is provided with two clamping members 301, and the two clamping members 301 fixed on the second transferring mechanism 402 are disposed at intervals along the third direction of the blow mold 100. The container blank is held by the holding members 301, so that the container blank is limited in the space between the holding members 301.

The cooling assembly 30 further includes a first shaping member 302 and a second shaping member 303 spaced apart along the third direction of the blow mold 100, the first shaping member 302 is adapted to be abutted against the top wall of the container blank and used for cooling the top wall of the shaped container blank, the second shaping member 303 is adapted to be abutted against the bottom wall of the container blank and used for cooling the bottom wall of the shaped container blank, since the shape of the inner wall of the first shaping member 302 opposite to the top wall of the plastic container 110 is identical to the preset machining shape of the top wall of the plastic container 110 due to the abutting fit of the first shaping member 302 and the top wall of the plastic container 110, the first shaping member 302 can play a role of fixing the plastic barrel head, and the shape of the inner wall of the second shaping member 303 opposite to the bottom wall of the plastic container 110 is identical to the preset machining shape of the bottom wall of the plastic container 110, the plastic container 110 can be effectively prevented from being deformed, the basic appearance requirement of the plastic container 110 is ensured, and the qualification rate of the plastic container 110 is improved.

Further, a first cooling duct 306 adapted for a flow of a cooling medium is defined in the first shaping member 302, and the first shaping member 302 has at least one first water inlet 304 and at least one first water outlet 305, both the first water inlet 304 and the first water outlet 305 being in communication with the first cooling duct 306. The second shaping member 303 defines a second cooling duct 309 therein adapted for flow of a cooling medium, and the second shaping member 303 has at least one second water inlet 307 and at least one second water outlet 308, both the second water inlet 307 and the second water outlet 308 being in communication with the second cooling duct 309. As shown in fig. 7 and 8, the first shaping member 302 and the second shaping member 303 are respectively provided with three water inlets and two water outlets, and the cooling medium (for example, cooling water) flows into the corresponding cooling pipes from the water inlets and then flows out from the water outlets.

The cooling medium in the first shaping member 302 exchanges heat with the top wall of the plastic container 110 to reduce the temperature of the top wall of the plastic container 110, thereby achieving the technical effect of cooling the top wall of the shaped plastic container 110. The cooling medium in the second shaping member 303 exchanges heat with the bottom wall of the plastic container 110 to reduce the temperature of the bottom wall of the plastic container 110, thereby achieving the technical effect of cooling the bottom wall of the shaped plastic container 110. The plastic container 110 where the first shaping member 302 and the second shaping member 303 are abutted can be cooled down quickly, so that the heat dissipation time of the plastic container 110 can be shortened, the plastic container 110 is prevented from changing in shape and size due to expansion caused by heat and contraction caused by cold as much as possible, and the qualification rate of the plastic container 110 is improved.

Further, referring to fig. 1 and 7, the top wall of the first shaping member 302 may further be provided with a first avoiding port 3031, where the first avoiding port 3031 is opposite to the open mouth of the container blank, and the first avoiding port 3031 is used for avoiding the blower. After passing through the first avoiding port 3031, a proper amount of gas is introduced into the container blank, so that the plastic container 110 can be cooled by the gas, the container blank can be supported by the gas pressure from the inner side of the container blank, and the deformation of the container blank caused by heat expansion and cold contraction can be reduced, thereby improving the product quality of the plastic container 110.

According to some specific embodiments of the present application, each transfer mechanism includes a main board 403, an auxiliary board 404 and a mounting block 405, where the main board 403 is fixedly connected with the main board 403, the positioning half is fixedly connected with the auxiliary board 404, the mounting block 405 is fixedly connected with the clamping member 301 of the cooling assembly 30, one end of the main board 403 near the auxiliary board 404 is provided with a protrusion, one end of the auxiliary board 404 near the main board 403 is provided with a groove, the protrusion and the groove are oppositely arranged, and the protrusion of the main board 403 can be inserted in the groove of the auxiliary board 404, and the protrusion of the main board 403 and the groove of the auxiliary board 404 cooperate to achieve the technical effect of fixedly connecting the main board 403 with the auxiliary board 404. The joint of the auxiliary plate 404 and the mounting block 405 is provided with the same splicing structure as described above, so that the technical effect of fixedly connecting the auxiliary plate 404 and the clamping block can be achieved.

By fixedly connecting the transfer mechanism with the main mold half-shell, the positioning half-shell and the clamping piece 301 of the cooling assembly 30, the main mold half-shell, the positioning half-shell and the clamping piece 301 of the cooling assembly 30 can be driven to reciprocate at the first position and the second position together, and the technical effects of continuously conveying and forming the plastic container 110 between the main mold half-shell and the positioning half-shell and between the positioning half-shell and the cooling half-shell can be realized.

Referring to fig. 1, 2 and 4, according to some specific embodiments of the present application, the positioning assembly 20 further includes a positioning member 207, the positioning member 207 is located on a side, close to the pin, of the positioning assembly 20, the positioning member 207 is fixedly connected with the pin, the positioning member 207 is provided with a first avoiding port 3031, the first avoiding port 3031 is used for avoiding the pin, the pin passes through the first avoiding port 3031 to introduce gas into the plastic container 110, the gas enables the plastic container 110 to be cooled and hardened in the positioning assembly 20 after being demolded from the first cavity 103, and the cutting mechanism is facilitated to efficiently and well remove the water gap material of the container blank.

Based on this, the application further discloses a blowing equipment, blowing equipment according to this application embodiment includes: blow mold 100, extrusion blow mechanism, trimming mechanism, cold feed and drive mechanism. The blow mold 100 has a main mold assembly 10, a positioning assembly 20, a cooling assembly 30 and a transfer mechanism assembly 40, wherein the main mold assembly 10, the positioning assembly 20 and the cooling assembly 30 are all fixed on the transfer mechanism assembly 40, and the transfer mechanism assembly 40 is movably disposed between a first position and a second position, and the blow mold 100 is the blow mold 100 described in the foregoing embodiments. The extrusion-blow mechanism has an extrusion die for extruding hot melt plastic into a plastic parison and a blow pin for expanding the plastic parison into a container preform within the first cavity 103 of the main die assembly 10. The edge cutting mechanism is suitable for being arranged opposite to the positioning component 20, and is used for cutting the water gap material of the container rough blank. The cooling member serves to supply a cooling medium to the cooling assembly 30. The drive mechanism is configured to reciprocate the transport mechanism set 40 between the first position and the second position.

According to the blow molding equipment disclosed by the embodiment of the application, when the blow molding equipment processes the plastic container 110, the transfer mechanism group 40 drives the main die assembly 10, the positioning assembly 20 and the cooling assembly 30 to reciprocate between the first position and the second position, so that the blow molding die 100 can realize extrusion molding, positioning cutting and cooling shaping of the plastic container 110, and the plastic container 110 is continuously produced.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. A blow mold for plastic containers, comprising:

-a main mould assembly (10), the main mould assembly (10) defining a first mould cavity (103), the main mould assembly (10) being adapted to clamp and contain a plastic parison and for shaping the plastic parison into a container blank within the first mould cavity (103);

the positioning assembly (20) is suitable for acquiring and positioning the container rough blank, the positioning assembly (20) is suitable for being arranged opposite to the edge cutting mechanism, and the container rough blank positioned by the positioning assembly is suitable for being cut off a water gap material by the edge cutting mechanism;

-a cooling assembly (30), the cooling assembly (30) being adapted to take the container blank from which nozzle material is cut, and the cooling assembly (30) being adapted to cool the container blank to form the container blank into the plastic container (110); the main mold assembly (10), the positioning assembly (20) and the cooling assembly (30) are sequentially arranged along a first direction of the blow mold (100);

the transfer mechanism group (40), the main die assembly (10), the positioning assembly (20) and the cooling assembly (30) are all fixed on the transfer mechanism group (40), the transfer mechanism group (40) is movably arranged between the first position and the second position along the first direction, in the first position, the main die assembly (10) clamps and holds the plastic parison, the positioning assembly (20) acquires and positions the container blank of the nozzle material to be cut, and the cooling assembly (30) acquires the container blank of the nozzle material to be cut;

in the second position, the main mold assembly (10) cooperates with a blowing needle to shape the plastic parison into a container preform, and the positioning assembly (20) cooperates with a trimming mechanism to remove gate stock from the container preform, and the cooling assembly (30) cools the container preform to form the container preform into the plastic container (110).

2. A blow mould for plastic containers according to claim 1, characterized in that the transfer set (40) comprises a first transfer mechanism (401) and a second transfer mechanism (402), the first transfer mechanism (401) and the second transfer mechanism (402) being arranged opposite each other in a second direction of the blow mould (100), the first transfer mechanism (401) and the second transfer mechanism (402) being adapted to move in opposite directions or in opposite directions in the second direction, wherein the first direction and the second direction are mutually perpendicular;

in the first position, the plastic parison is caused to extend into the main mould assembly (10) by the first transfer mechanism (401) and the second transfer mechanism (402) moving in the second direction in opposite directions, and the container blank to be cut out of the gate material is caused to extend into the positioning assembly (20), and the container blank to be cut out of the gate material is caused to extend into the cooling assembly (30), and the plastic parison is caused to be clamped by the main mould assembly (10) by the first transfer mechanism (401) and the second transfer mechanism (402) moving in opposite directions in the second direction, and the positioning assembly (20) is caused to position and clamp the container blank, and the cooling assembly (30) is caused to clamp the container blank to be cut out of the gate material;

In the second position, the container blank to be cut of the nozzle material is released by the main mould assembly (10), the container blank to be cut of the nozzle material is released by the positioning assembly (20), and the plastic container (110) is released by the cooling assembly (30) by the first transfer mechanism (401) and the second transfer mechanism (402) moving reversely in the second direction.

3. A blow mould for plastic containers according to claim 1 or 2, characterized in that in the first direction the distance between the main mould assembly (10) and the positioning assembly (20) is L1, the distance between the positioning assembly (20) and the cooling assembly (30) is L2, the distance between the first position and the second position is L3, L1, L2 and L3 satisfy the relation: l1=l2=l3.

4. A blow mould for plastic containers according to claim 2, characterized in that the main mould assembly (10) comprises a first main mould half (104) and a second main mould half (105), the first main mould half (104) being fixed to the first transfer mechanism (401), the second main mould half (105) being fixed to the second transfer mechanism (402), the first main mould half (104) and the second main mould half (105) being arranged opposite each other in the second direction, the first main mould half (104) and the second main mould half (105) together defining the first mould cavity (103), the first main mould half (104) being adapted to be separated from or stopped against the second main mould half (105);

The first main mould half (104) has a positioning groove (1041) and the second main mould half (105) has a positioning protrusion (1051), the positioning protrusion (1051) being adapted to extend into the positioning groove (1041).

5. A blow mould for plastic containers according to claim 4, characterized in that the first main mould half-shell (104) and the second main mould half-shell (105) each comprise a first forming section (106), a second forming section (107), a mounting seat (108) and a propping piece, the second forming section (107) is mounted on the corresponding mounting seat (108), one end of the propping piece is in connection fit with the corresponding first forming section (106), the other end of the propping piece is in connection fit with the corresponding mounting seat (108), and the mounting seat (108) is driven to move towards or away from the first forming section (106) by the stretching deformation of the propping piece in a third direction of the blow mould (100), wherein the first direction, the second direction and the third direction are vertically arranged pairwise.

6. A blow mould for plastic containers according to claim 2, characterized in that the positioning assembly (20) comprises a first positioning half-shell (201) and a second positioning half-shell (202), the first positioning half-shell (201) being fixed to the first transfer mechanism (401), the second positioning half-shell (202) being fixed to the second transfer mechanism (402), the first positioning half-shell (201) and the second positioning half-shell (202) together defining a positioning cavity (2021) matching the external shape of the container blank, the positioning cavity (2021) being used for positioning the container blank.

7. A blow mould for plastic containers according to claim 2, characterized in that the positioning assembly further comprises a first kinematic seat (203), a first guide (204), a second kinematic seat (205) and a second guide (206), one end of the first guide (204) being threaded through the first transfer mechanism (401) and the first guide (204) extending in the second direction, the first kinematic seat (203) being fixed to the other end of the first guide (204); one end of the second guide piece (206) penetrates through the second transferring mechanism (402), the second guide piece (206) extends along the second direction, the second moving seat (205) is fixed to the other end of the second guide piece (206), the first moving seat (203) and the second moving seat (205) are opposite and are spaced to form a clamping gap, the clamping gap is suitable for the penetration of a water gap material of a container blank, and one of the first moving seat (203) and the second moving seat (205) is pushed to move along the second direction when driven by the edge cutting mechanism.

8. A blow mould for plastic containers according to claim 2, characterized in that the cooling assembly (30) comprises a plurality of clamps (301), at least one of the clamps (301) being provided to the first transfer mechanism (401) and at least one of the clamps (301) being provided to the second transfer mechanism (402), a plurality of clamps being provided for jointly clamping the container blank;

The cooling assembly (30) further comprises a first shaping member (302) and a second shaping member (303) which are spaced apart along the third direction of the blow molding die (100), the first shaping member (302) is suitable for being abutted against the top wall of the container blank and used for cooling and shaping the top wall of the container blank, the second shaping member (303) is suitable for being abutted against the bottom wall of the container blank and used for cooling and shaping the bottom wall of the container blank, a first avoiding opening (3031) is further arranged on the top wall of the first shaping member (302), the first avoiding opening (3031) is opposite to the opening of the container blank, and the first avoiding opening (3031) is used for avoiding the air blowing member.

9. A blow mould for plastic containers according to claim 8, characterized in that the first shaping member (302) defines therein a first cooling duct (306) adapted for the flow of a cooling medium, and in that the first shaping member (302) has at least one first water inlet (304) and at least one first water outlet (305), the first water inlet (304) and the first water outlet (305) being in communication with the first cooling duct (306);

the second shaping piece (303) is internally provided with a second cooling pipeline (309) suitable for flowing a cooling medium, the second shaping piece (303) is provided with at least one second water inlet (307) and at least one second water outlet (308), and the second water inlet (307) and the second water outlet (308) are communicated with the second cooling pipeline (309).

10. A blow molding apparatus, comprising:

blow mould (100), the blow mould (100) having a main mould assembly (10), a positioning assembly (20), a cooling assembly (30) and a transfer mechanism group (40), the main mould assembly (10), the positioning assembly (20) and the cooling assembly (30) being all fixed to the transfer mechanism group (40), the transfer mechanism group (40) being movably arranged between a first position and a second position, wherein the blow mould (100) is a blow mould for a plastic container according to any one of claims 1-9;

an extrusion-blow mechanism having an ejection die for extruding hot melt plastic into a plastic parison and a blow pin for expanding the plastic parison into a container preform within the first cavity (103) of the main die assembly (10);

the edge cutting mechanism is suitable for being arranged opposite to the positioning assembly (20), and is used for cutting a water gap material of the container blank;

-a cooling element for providing a cooling medium to the cooling assembly (30);

and the driving mechanism is used for driving the transfer mechanism group (40) to reciprocate between the first position and the second position.