CN112372993B - Extrusion blow molding mold opening and closing device and extrusion blow molding machine - Google Patents
Extrusion blow molding mold opening and closing device and extrusion blow molding machine Download PDFInfo
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- CN112372993B CN112372993B CN202011318816.0A CN202011318816A CN112372993B CN 112372993 B CN112372993 B CN 112372993B CN 202011318816 A CN202011318816 A CN 202011318816A CN 112372993 B CN112372993 B CN 112372993B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/56—Opening, closing or clamping means
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- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides an extrusion blow molding die opening and closing device and an extrusion blow molding machine, and belongs to the technical field of plastic processing. The device solves the problem that the existing extrusion blow molding die opening and closing device is insufficient in number of types. The extrusion blow mold opening and closing device comprises an opening and closing mold seat, a sliding seat and two opening and closing swing rods, wherein the sliding seat is connected with the opening and closing mold seat through a first linear guide assembly, a driving piece connected with the sliding seat is arranged on the opening and closing mold seat, the middle part of each opening and closing swing rod is connected with the sliding seat, a half mold mounting seat is arranged at one end of each opening and closing swing rod, a half mold of an extrusion blow mold can be arranged on the half mold mounting seat, the other end of each opening and closing swing rod is connected with the opening and closing mold seat through a first rotating shaft in a rotating mode, and when the driving piece drives the sliding seat to move along the guide direction of the first linear guide assembly, one end parts of the two opening and closing swing rods are close to each other or far away from each other. The extrusion blow mold opening and closing device can improve the swing amplitude of the half mold mounting seat and increase the distance between two half molds.
Description
Technical Field
The invention belongs to the technical field of plastic processing, and relates to blow molding, in particular to an extrusion blow molding die opening and closing device.
The invention belongs to the technical field of plastic processing, and relates to blow molding, in particular to an extrusion blow molding machine.
Background
Extrusion blow molding is a method of manufacturing hollow thermoplastic articles such as bottles, drums, tanks, boxes, and containers for packaging food, beverages, cosmetics, pharmaceuticals, and commodity products. Extrusion blow molds are one of the important components of blow molding, with parisons in the extrusion blow mold. Extrusion blow molds are formed by having two mold halves, typically both mounted on a set of linear guide rails, which are moved to open and close the mold. There are many references concerning the opening and closing of extrusion blow molds, such as a blow mold opening and closing apparatus and a blow molding machine (application number 201710658425.5), and a blow molding machine (application number 201710658468.3).
The applicant has proposed an extrusion blow mold (application number 202010365098.6) with which the processing of blow molded products reduces the weight fraction of flash in blow molded parts, resulting in reduced container manufacturing costs. When the blow molding machine (application number 201710658468.3) is used for production, the following defects are existed, namely, 1, the number of the extrusion blow molding molds is large, the manufacturing cost of products can be increased in small batch production, 2, the movement speed of the extrusion blow molding molds is controlled only through the shape of a guide groove due to synchronous rotation linkage among the extrusion blow molding molds, the shape of the guide groove is fixed, the speed of the extrusion blow molding molds is not beneficial to adjustment, in actual production, the butt joint of all adjacent two sets of extrusion blow molding molds can not be guaranteed, the butt joint consistency is guaranteed, if the required technical requirement is met, the problem that the precision requirement of the blow molding machine is high, the debugging time is long exists, and if the required technical requirement cannot be met, the problem that the product qualification rate of part of the products is low exists.
Disclosure of Invention
The invention provides an extrusion blow molding die opening and closing device, which aims to solve the technical problem of how to provide another extrusion blow molding die opening and closing device, and preferably enables the head and tail of two adjacent extrusion blow molding dies to be more easily butted and the butt joint consistency to be improved.
The invention provides an extrusion blow molding machine, which aims to solve the technical problem of providing another extrusion blow molding machine, and preferably enables the head and the tail of two adjacent extrusion blow molding dies to be more easily butted and improves the butt joint anastomosis.
The technical problem to be solved by the invention can be solved by the following technical scheme that the extrusion blow mold opening and closing device comprises an opening and closing mold seat, a sliding seat and two opening and closing swing rods, wherein the sliding seat is connected with the opening and closing mold seat through a first linear guide assembly, a driving piece connected with the sliding seat is arranged on the opening and closing mold seat, the middle part of the opening and closing swing rod is connected with the sliding seat, one end of the opening and closing swing rod is provided with a half mold mounting seat, a half mold of the extrusion blow mold can be arranged on the half mold mounting seat, the other end of the opening and closing swing rod is rotationally connected with the opening and closing mold seat through a first rotating shaft, and when the driving piece drives the sliding seat to move along the guide direction of the first linear guide assembly, one end parts of the two opening and closing swing rods are mutually close to or mutually far away from each other.
The two opening and closing swinging rods are provided with half mold installation seats, so that the number of the half mold installation seats is two, and the two half mold of the extrusion blow mold and the two half mold installation seats are installed in one-to-one correspondence. When the driving piece drives the sliding seat to move in the extrusion blow mold opening and closing device, the sliding seat drives the opening and closing swing rod to swing around the first rotating shaft, so that the half mold and the half mold mounting seat swing around the first rotating shaft equivalently, and the opening or closing between the two half molds is realized.
In the extrusion blow mold opening and closing device, the first rotating shaft is positioned between the half mold mounting seat and the sliding seat, and the sliding seat is positioned between the opening and closing swing rod and the driving piece.
In the extrusion blow molding die opening and closing device, the driving piece is an oil cylinder or an air cylinder, the cylinder body is rotationally connected with the opening and closing die holder, and the piston rod is rotationally connected with the sliding seat.
In the extrusion blow molding die opening and closing device, the two opening and closing swing rods share a first rotating shaft.
In the extrusion blow molding die opening and closing device, a connecting rod is arranged between the opening and closing swing rod and the sliding seat, one end of the connecting rod is rotationally connected with the opening and closing swing rod through a second rotating shaft, the other end of the connecting rod is rotationally connected with the sliding seat through a third rotating shaft, or the opening and closing swing rod is connected with the sliding seat through a fourth rotating shaft, and the shaft hole of the sliding seat is in a strip shape.
In the extrusion blow mold opening and closing device, the opening and closing swing rods are bent, and the two opening and closing swing rods are oppositely arranged.
In the extrusion blow mold opening and closing device, the half mold mounting seat is rotationally connected with the opening and closing swing rod through a fifth rotating shaft.
In the extrusion blow mold opening and closing device, the extrusion blow mold opening and closing device further comprises an elastic piece capable of resetting the half mold mounting seat.
The extrusion blow molding machine comprises a frame and two groups of extrusion blow mold opening and closing devices, wherein one extrusion blow mold is installed on each group of extrusion blow mold opening and closing device, the two groups of extrusion blow mold opening and closing devices are oppositely arranged, an opening and closing mold seat is connected with the frame through a second linear guide assembly, when one extrusion blow mold is in an open state, the other extrusion blow mold is in a closed state, and when one extrusion blow mold opening and closing device moves along the guide direction of the second linear guide assembly relative to the other extrusion blow mold opening and closing device, the extrusion blow mold in the closed state can pass through the two mold halves in the extrusion blow mold in the open state.
The extrusion blow molding machine can realize the up-down alternate arrangement of two sets of extrusion blow molding molds by controlling the two sets of extrusion blow molding mold opening and closing devices to move along the guiding direction of the second linear guiding component and controlling the action of the driving piece, for example, one set of extrusion blow molding mold is in the blow molding step, and the other set of extrusion blow molding mold is in the product demolding step.
Compared with the prior art, the extrusion blow mold opening and closing device enables one end part of the opening and closing swing rod to swing relative to the other end part, so that the swing amplitude of the half mold mounting seat can be improved, the distance between two half molds when the extrusion blow mold is in an open state is further increased, and therefore one set of extrusion blow mold in a closed state can pass through the two half molds in the other set of extrusion blow mold in the open state.
Compared with the prior art, the extrusion blow molding machine can realize continuous production of products by only two sets of extrusion blow molding dies, the number of the extrusion blow molding dies is obviously reduced, and further the manufacturing cost of the products is obviously reduced.
When the two sets of extrusion blow molding dies in the extrusion blow molding machine alternately move up and down, one set of extrusion blow molding die in a closed state directly passes through the space between the two half dies in the other set of extrusion blow molding die in an open state, so that the moving steps of the extrusion blow molding machine are reduced, the structural compactness of the extrusion blow molding machine is improved, the manufacturing cost of the extrusion blow molding machine is reduced, and the operation stability of the extrusion blow molding machine is improved.
When the two sets of extrusion blow molding dies in the extrusion blow molding machine alternately act up and down, the moving speed of the two sets of extrusion blow molding die opening and closing devices can be controlled separately, and the head and tail butt joint of the two sets of extrusion blow molding dies is tighter by combining the opening and closing time of the extrusion blow molding dies, so that the butt joint efficiency is higher, and the production efficiency and the product qualification rate of products are improved.
In the extrusion blow molding machine, two groups of driving assemblies comprising motors are arranged on the frame, and the two groups of driving assemblies are connected with the two groups of extrusion blow molding mold opening and closing devices in a one-to-one correspondence manner.
Drawings
Fig. 1 is a schematic perspective view showing an extrusion blow mold in a mold-closed state in an extrusion blow mold opening and closing device.
Fig. 2 is a schematic bottom view of an extrusion blow mold in a closed state on an extrusion blow mold opening and closing device.
Fig. 3 is a schematic perspective view showing an extrusion blow mold in an open state on an extrusion blow mold opening and closing device.
Fig. 4 is a schematic bottom view of an extrusion blow mold in an open state on an extrusion blow mold opening and closing device.
Fig. 5 and 6 are schematic perspective views of the extrusion blow molding machine in different states.
In the drawing, 1, a frame, 2, an extrusion blow mold, 2a, a half mold, 2b, an air injection mechanism, 3, an extrusion blow mold opening and closing device, 3a, an opening and closing mold seat, 3b, a sliding seat, 3c, an opening and closing swing rod, 3d, a first linear guide component, 3e, a driving piece, 3f, a first rotating shaft, 3g, a connecting rod, 3h, a second rotating shaft, 3i, a third rotating shaft, 3j, a half mold mounting seat, 3k, a fifth rotating shaft, 4, a second linear guide component, 5, a driving component, 5a, a motor, 5b, a driving belt, 5c, a follower wheel, 5d, a driving wheel, 6, a counterweight component, 6a, a counterweight block, 6b, a connecting belt, 6c, a roller, 7, an extrusion head and 8, and raw materials.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
In a first embodiment, as shown in fig. 1 to 4, an extrusion blow mold opening and closing device 3 includes an opening and closing mold base 3a, a sliding base 3b, and two opening and closing swing arms 3c.
The two side parts of the sliding seat 3b are connected with the opening and closing die holder 3a through the first linear guide assembly 3d, so that the bearing capacity of the sliding seat 3b is improved, and the movement stability of the sliding seat 3b is improved. The guide direction of the first linear guide assembly 3d is a horizontal direction, whereby the slide holder 3b can be horizontally moved along the guide direction of the first linear guide assembly 3 d.
The driving piece 3e connected with the sliding seat 3b is arranged on the opening and closing die holder 3a, the driving piece 3e is an oil cylinder or an air cylinder, the cylinder body is rotationally connected with the opening and closing die holder 3a, and the piston rod is rotationally connected with the sliding seat 3b, so that the installation precision of the driving piece 3e can be reduced, and the sliding flexibility and the sliding stability of the sliding seat 3b can be ensured.
One end of the opening and closing swing rod 3c is rotatably connected with the opening and closing die holder 3a through a first rotating shaft 3f, and the two opening and closing swing rods 3c share the first rotating shaft 3f, so that the structure compactness of the extrusion blow-molding die opening and closing device 3 can be improved, and the manufacturing cost is reduced.
The middle part of the opening and closing swing rod 3c is connected with the sliding seat 3b, a connecting rod 3g is arranged between the opening and closing swing rod 3c and the sliding seat 3b in the attached drawing of the specification, one end of the connecting rod 3g is rotationally connected with the opening and closing swing rod 3c through a second rotating shaft 3h, and the other end of the connecting rod 3g is rotationally connected with the sliding seat 3b through a third rotating shaft 3 i. When the sliding seat 3b moves, the sliding seat 3b drives the connecting rod 3g to move, and the connecting rod 3g drives the opening and closing swinging rod 3c to swing around the first rotating shaft 3f, so that the structure not only ensures that the opening and closing swinging rod 3c can be driven to swing when the sliding seat 3b moves, but also accords with the lever characteristic, has the reinforcing effect, and can reduce the output acting force of the driving piece 3e when the clamping force of the extrusion blow mold 2 is ensured.
The two opening and closing swing rods 3c are positioned between the two groups of first linear guide assemblies 3d, the opening and closing swing rods 3c are bent, the two opening and closing swing rods 3c are oppositely arranged, and the maximum distance between the other ends of the two opening and closing swing rods 3c can be controlled by controlling the bending angle and the length of the opening and closing swing rods 3 c.
The other end of the opening and closing swing rod 3c is provided with a half mould mounting seat 3j, and the half mould mounting seat 3j is used for mounting a half mould 2a of the extrusion blow mould 2. The half-mold mounting seat 3j is rotationally connected with the opening and closing swing rod 3c through a fifth rotating shaft 3 k. The extrusion blow mold opening and closing device 3 further comprises an elastic piece capable of resetting the half mold mounting seat 3j, the elastic piece is a torsion spring, the torsion spring is sleeved on the fifth rotating shaft 3k, one end of the torsion spring is connected with the opening and closing swing rod 3c, and the other end of the torsion spring is connected with the half mold mounting seat 3 j. According to actual conditions, the spring piece can also adopt a tension spring, one end of the tension spring is connected with the opening and closing swing rod 3c, and the other end of the tension spring is connected with the half-mold mounting seat 3 j.
The first rotating shaft 3f is positioned between the half die mounting seat 3j and the sliding seat 3b, the sliding seat 3b is positioned between the opening and closing swinging rod 3c and the driving piece 3e, the arrangement structure has reasonable arrangement and simple structure, the space between the two half die mounting seats 3j is large, the space satisfies the installation of the extrusion blow mold 2 and the condition that one group of extrusion blow mold 2 in a closed state can pass through between two half dies 2a in the other group of extrusion blow mold 2 in an open state.
The extrusion blow mold 2 comprises two half molds 2a and a group of gas injection mechanisms 2b, wherein the two half molds 2a and the two half mold mounting seats 3j are correspondingly arranged one by one, the gas injection mechanisms 2b are arranged on a first rotating shaft 3f, and the gas injection mechanisms 2b can rotate along with one half mold 2 a. The function and advantages of the various components are further illustrated by the description of the mold opening and closing process of the extrusion blow mold 2. The piston rod of the driving member 3e is in an extended state and the extrusion blow mold 2 is in a mold-closed state as shown in fig. 1 and 2, and the piston rod of the driving member 3e is in a retracted state and the extrusion blow mold 2 is in an open state as shown in fig. 3 and 4.
When the piston rod of the driving piece 3e gradually extends out of the retracted state, the driving piece 3e pushes the sliding seat 3b to horizontally move forwards along the guiding direction of the first linear guiding component 3d, the sliding seat 3b pushes the two connecting rods 3g to synchronously move and swing, the connecting rods 3g push the opening and closing swinging rods 3c to rotate around the first rotating shaft 3f, the two opening and closing swinging rods 3c synchronously swing in opposite directions, the distance between the other ends of the two opening and closing swinging rods 3c is gradually reduced, the opening and closing swinging rods 3c drive the half die mounting seat 3j and the half die 2a of the extrusion blow die 2 to swing, so that the two half dies 2a of the extrusion blow die 2 are gradually closed to realize die assembly, the distance between the extrusion blow die 2 and the opening and closing die holder 3a is increased, and the extrusion blow die 2 stretches out of the opening and closing die holder 3a, and products are conveniently processed.
When the piston rod of the driving piece 3e gradually retracts from the extending state, the driving piece 3e pulls the sliding seat 3b to horizontally and backwardly move along the guiding direction of the first linear guiding component 3d, the sliding seat 3b pulls the two connecting rods 3g to synchronously move and swing, the connecting rods 3g pull the opening and closing swinging rods 3c to rotate around the first rotating shaft 3f, the two opening and closing swinging rods 3c synchronously swing in opposite directions, the opening and closing swinging rods 3c drive the half die mounting seat 3j and the half die 2a of the extrusion blow mold 2 to swing, the distance between the other ends of the two opening and closing swinging rods 3c is gradually increased, so that the distance between the two half dies 2a of the extrusion blow mold 2 is gradually increased, the die opening is realized, the distance between the extrusion blow mold 2 and the opening and closing die seat 3a is reduced, the distance between the two half dies 2a is increased, the occupied volume is reduced, and interference caused by the movement of the two sets of extrusion blow mold 2 is avoided.
The extrusion blow mold opening and closing device 3 can also reduce the overhanging size of the extrusion blow mold 2, further improve the installation stability of the extrusion blow mold 2 and improve the up-and-down butt joint anastomosis degree of the two extrusion blow molds 2.
The extrusion blow molding machine comprises a frame 1 and two groups of extrusion blow mold opening and closing devices 3, wherein the two groups of extrusion blow mold opening and closing devices 3 are oppositely arranged, and each group of extrusion blow mold opening and closing devices 3 is provided with one set of extrusion blow mold 2. The structure of the extrusion blow mold opening and closing device 3 can enable the extrusion blow mold 2 to extend or retract, so that the interval between two groups of extrusion blow mold opening and closing devices 3 can be reduced, and the structural compactness of the extrusion blow molding machine is further improved.
The left side and the right side of the die opening and closing seat 3a in the extrusion blow-molding die opening and closing device 3 are connected through the second linear guide component 4, so that the bearing capacity and the stability of the extrusion blow-molding die opening and closing device 3 are improved. The second linear guide assembly 4 is oriented in a vertical direction, whereby the extrusion blow mold opening and closing device 3 can be moved up and down along the direction of the second linear guide assembly 4. The axis of the first rotating shaft 3f is vertically arranged, so that the two half molds 2a of the extrusion blow mold 2 are horizontally opened and closed, and the raw material 8 in a vertical state can be extruded, thereby being beneficial to improving the quality of products.
Two groups of driving components 5 are arranged on the frame 1, and the two groups of driving components 5 are connected with the two groups of extrusion blow mould opening and closing devices 3 in a one-to-one correspondence manner. The driving assembly 5 comprises a motor 5a and a driving belt 5b, wherein a shell of the motor 5a is fixed on the frame 1, the driving belt 5b is connected with an opening and closing die holder 3a of the extrusion blow molding die opening and closing device 3, a follower wheel 5c connected with the driving belt 5b is arranged on the frame 1, and a driving wheel 5d connected with the driving belt 5b is fixed on a rotating shaft of the motor 5 a. The extrusion blow mold opening and closing device 3 can be controlled to ascend or descend and adjust the ascending and descending speed by controlling the rotation direction and the rotation speed of the motor 5a, the speeds of the upper extrusion blow mold 2 and the lower extrusion blow mold 2 can be respectively controlled, the speeds can be flexibly adjusted according to actual conditions, and the head-to-tail butt joint directivity between the upper extrusion blow mold 2 and the lower extrusion blow mold 2 is obviously improved. The motor 5a has a large rotating speed regulating range and high precision, so that the falling speed of the blow mold opening and closing device is the same as the plastic extrusion speed or is larger than the plastic extrusion speed.
Two sets of counterweight components 6 are also installed on the frame 1, and the two sets of counterweight components 6 are connected with the two sets of extrusion blow mould opening and closing devices 3 in a one-to-one correspondence manner. The counterweight assembly 6 comprises a counterweight 6a and a connecting belt 6b, a roller 6c is mounted on the frame 1, the connecting belt 6b is sleeved on the roller 6c, and the connecting belt 6b is connected with the counterweight 6a and an opening and closing die holder 3a of the extrusion blow molding die opening and closing die device 3. The weight block 6a with proper weight is selected according to the gravity of the extrusion blow mold opening and closing device 3 and the extrusion blow mold 2, so that the load of the motor 5a is obviously reduced, the speed regulation precision is improved, and the lifting flexibility and stability of the extrusion blow mold opening and closing device 3 are improved.
The transmission belt 5b has slight elasticity, which exists objectively, and through controlling the transitional rotation of the motor 5a, not only the complete fitting of the extrusion blow molds 2 which are butted up and down is ensured, but also a certain pressure is generated between the upper extrusion blow mold 2 and the lower extrusion blow mold 2, and the head-to-tail butt fit of the upper extrusion blow mold 2 and the lower extrusion blow mold 2 is obviously improved.
When a product is processed by an extrusion blow molding machine, the extrusion head 7 is located directly above the extrusion blow molding machine, and the raw material 8 extruded from the extrusion head 7 naturally moves vertically downward. The driving assembly 5 drives the extrusion blow mold opening and closing device 3 to reciprocate downwards and upwards, the extrusion blow mold 2 is in a mold closing state in the downwards process, and the extrusion blow mold 2 is in a mold opening state in the upwards process.
The role and advantages of the various components are further illustrated by illustrating several specific processes for processing products using extrusion blow molding machines. For convenience of description, the two sets of extrusion blow mold opening and closing devices 3 are respectively referred to as a first extrusion blow mold opening and closing device 3 and a second extrusion blow mold opening and closing device 3, the extrusion blow mold 2 mounted on the first extrusion blow mold opening and closing device 3 is referred to as a first extrusion blow mold 2, the extrusion blow mold 2 mounted on the second extrusion blow mold opening and closing device 3 is referred to as a second extrusion blow mold 2, the driving assembly 5 connected with the first extrusion blow mold opening and closing device 3 is referred to as a first driving assembly 5, and the driving assembly 5 connected with the second extrusion blow mold opening and closing device 3 is referred to as a second driving assembly 5.
As shown in fig. 5, the first extrusion blow mold 2 is located above the second extrusion blow mold 2, the first extrusion blow mold 2 is in a mold closed state, and the second extrusion blow mold 2 is in a mold open state. In this state, the raw material 8 in the first extrusion blow mold 2 is preferably blow-molded, and the raw material 8 in the first extrusion blow mold 2 is blow-molded into a product. In the blow molding process of the first extrusion blow mold 2, a motor 5a in the first driving assembly 5 is required to be controlled to rotate, so that the first driving assembly 5 drives the first extrusion blow mold opening and closing device 3 to continuously move downwards, in the process, the second driving assembly 5 drives the second extrusion blow mold opening and closing device 3 to move upwards, the first extrusion blow mold 2 passes between two half molds 2a in the second extrusion blow mold 2, and normally, the downward moving speed of the first extrusion blow mold opening and closing device 3 is the same as the extrusion speed of the extrusion head 7 extruding the raw material 8.
The first extrusion blow mold opening and closing device 3 moves downward, the second extrusion blow mold opening and closing device 3 moves upward, and the state shown in fig. 6 can be achieved, and the second extrusion blow mold 2 is located above the first extrusion blow mold 2.
After the blow molding machine is in the state shown in fig. 6, the upper end portion of the first extrusion blow mold 2 is abutted against the lower end portion of the second extrusion blow mold 2 and the second extrusion blow mold 2 is clamped by operating the second drive unit 5 and the drive element 3e in the second extrusion blow mold opening and closing device 3. Before the two half molds 2a in the second extrusion blow mold 2 are closed, the rotation speed of the motor 5a in the first driving assembly 5 is controlled, so that the downward moving speed of the first extrusion blow mold opening and closing device 3 is larger than the extrusion speed of the extrusion head 7 for extruding the raw material 8, and the extrusion raw material 8 is axially stretched, thereby being beneficial to remolding molecular chains of the raw material 8 and improving the characteristics of the material, in particular transparency.
After the first extrusion blow mold 2 and the second extrusion blow mold 2 are both in a mold closing state, a motor 5a in the second driving assembly 5 is controlled to rotate, so that the second driving assembly 5 drives the second extrusion blow mold opening and closing device 3 to continuously move downwards, and the process is suitable for blowing the raw material 8 in the second extrusion blow mold 2, so that the raw material 8 in the second extrusion blow mold 2 is blown into a product. The rotational speed of the motor 5a in the first drive assembly 5 is also increased during this process to achieve a downward movement of the first extrusion blow mold opening and closing device 3 greater than the downward movement of the second extrusion blow mold opening and closing device 3, whereby the first extrusion blow mold 2 is separated from the second extrusion blow mold 2 and the feedstock 8 in the first extrusion blow mold 2 is pulled apart from the feedstock 8 in the second extrusion blow mold 2.
After the first extrusion blow mold 2 is separated from the second extrusion blow mold 2, the driving member 3e in the first extrusion blow mold opening and closing device 3 is manipulated, the first extrusion blow mold 2 is opened, and the product in the first extrusion blow mold 2 falls.
The second embodiment is basically the same as the first embodiment in structure and principle, and basically the same points are not described in detail, and only different points are described, wherein the difference points are that the middle part of the opening and closing swing rod 3c is connected with the sliding seat 3b through a fourth rotating shaft, and the shaft hole of the sliding seat 3b is in a strip shape. When the sliding seat 3b moves, the sliding seat 3b drives the fourth rotating shaft to move, the fourth rotating shaft drives the opening and closing swinging rod 3c to swing around the first rotating shaft 3f, and in the process, the fourth rotating shaft moves along the side wall of the shaft hole.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011318816.0A CN112372993B (en) | 2020-11-23 | 2020-11-23 | Extrusion blow molding mold opening and closing device and extrusion blow molding machine |
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| CN202011318816.0A CN112372993B (en) | 2020-11-23 | 2020-11-23 | Extrusion blow molding mold opening and closing device and extrusion blow molding machine |
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| CN112372993A CN112372993A (en) | 2021-02-19 |
| CN112372993B true CN112372993B (en) | 2025-03-11 |
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| CN213675406U (en) * | 2020-11-23 | 2021-07-13 | 台州市祥珑食品容器科技股份有限公司 | Mold opening and closing device for extrusion blow molding mold and extrusion blow molding forming machine |
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| CN105835341A (en) * | 2016-04-01 | 2016-08-10 | 江苏悦达包装储运有限公司 | Blow molding device |
| CN110421824B (en) * | 2019-07-23 | 2025-02-18 | 德玛克（长兴）注塑系统有限公司 | A rotary blow mold opening and closing device |
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| CN213675406U (en) * | 2020-11-23 | 2021-07-13 | 台州市祥珑食品容器科技股份有限公司 | Mold opening and closing device for extrusion blow molding mold and extrusion blow molding forming machine |
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