WO2022105935A1 - Extrusion blow molding machine and method for using extrusion blow molding machine to process product - Google Patents

Abstract

An extrusion blow molding machine and a method for using the extrusion blow molding machine to process a product, relating to the technical field of plastic processing. The invention solves the problem that existing blow molding machines are not suitable for some models of extrusion blow mold processing products. The present extrusion blow molding machine comprises a rack and two groups of extrusion blow mold opening and closing devices. An extrusion blow mold set is mounted on each group of extrusion blow mold opening and closing devices, and the extrusion blow mold opening and closing devices are connected with the rack by means of a second linear guide assembly. When one extrusion blow mold set is in an opened state, the other extrusion blow mold set is in a closed state, and one group of extrusion blow mold opening and closing devices moves along the direction of the second linear guide assembly relative to the other group of extrusion blow mold opening and closing devices: the extrusion blow mold that is in the closed state is able to pass through two half molds in the extrusion blow mold that is in the open state.

Description

Extrusion blow molding machine and method for processing products using extrusion blow molding machine technical field

The invention belongs to the technical field of plastic processing, and relates to a blow molding, in particular to an extrusion blow molding machine.

The invention belongs to the technical field of plastic processing, and relates to a blow molding, in particular to a method for processing products by using an extrusion blow molding machine.

Background technique

Extrusion blow molding is a method of manufacturing hollow thermoplastic parts such as bottles, barrels, cans, boxes, and containers for packaging food, beverages, cosmetics, pharmaceuticals, and daily necessities.

There are many relevant documents about extrusion blow molding machines, such as the blow molding machine described in the Chinese patent literature (application number 201710658468.3); including a frame, a turntable and multiple sets of blow mold opening and closing devices, multiple sets of blow mold opening and closing devices The devices are distributed circumferentially around the axis of the turntable; a set of blow molds is installed on each group of blow mold opening and closing devices, so the number of blow molds is large, and the equipment is not suitable for small batch production. Furthermore, the applicant has also proposed an extrusion blow molding mold (application number 202010365098.6), and the above-mentioned blow molding machine and the above-mentioned extrusion blow molding mold have a long debugging time when processing products, and the two adjacent sets of molds cannot be docked. Consistency, which affects the product qualification rate.

SUMMARY OF THE INVENTION

The present invention proposes an extrusion blow molding machine, and the technical problem to be solved by the present invention is how to propose an extrusion blow molding machine suitable for producing products in small batches.

The present invention proposes a method for processing products using extrusion blow molding machines, and the technical problem to be solved by the present invention is how to propose a method for processing products using extrusion blow molding machines suitable for industrial production.

The technical problem to be solved by the present invention can be achieved by the following technical solutions: an extrusion blow molding machine, comprising a frame and two groups of extrusion blow mold opening and closing devices, each group of extrusion blow mold opening and closing devices A set of extrusion blow molds is installed on the mold device; two sets of extrusion blow mold mold opening and closing devices are arranged oppositely, and the extrusion blow mold opening and closing mold devices and the frame are connected by a second linear guide assembly; When one set of extrusion blow molds is in an open state, the other set of extrusion blow molds is in a closed state, and one set of extrusion blow mold opening and closing devices is relative to another set of extrusion blow mold opening and closing devices When moving along the guiding direction of the second linear guide assembly, the extrusion blow mold in the closed state can pass between the two half-moulds in the extrusion blow mold in the open state.

The extrusion blow molding machine realizes the up and down reciprocating movement of the extrusion blow mold opening and closing device by controlling the two sets of extrusion blow mold opening and closing devices to move along the guiding direction of the second linear guide assembly. The action of the mold opening and closing device realizes the reciprocating action of the extrusion blow mold opening and closing, which can be realized by orderly controlling the movement of the two groups of extrusion blow mold opening and closing devices and controlling the action of the extrusion blow mold opening and closing device. Two sets of extrusion blow molds are arranged alternately up and down, for example, one set of extrusion blow molds is in the downward movement and is in the blow molding step, and the other set of extrusion blow molds is in the mold opening state and moves up the step.

In the above extrusion blow molding machine, the guiding direction of the second linear guide assembly is perpendicular to the opening and closing direction of the two half-molds of the extrusion blow mold.

In the above extrusion blow molding machine, two sets of drive assemblies including motors are installed on the frame, and the two sets of drive assemblies are connected with the two sets of extrusion blow mold opening and closing devices in a one-to-one correspondence.

In the above extrusion blow molding machine, two sets of drive assemblies including motors are installed on the frame, and the two sets of drive assemblies are connected to the two sets of extrusion blow mold opening and closing devices in a one-to-one correspondence.

In the above extrusion blow molding machine, the drive assembly further includes a transmission belt, the housing of the motor is fixed on the frame, and the rotating shaft of the motor and the extrusion blow mold opening and closing device are connected by the transmission belt.

In the above extrusion blow molding machine, a follower wheel is installed on the frame, a drive belt is sleeved on the follower wheel, and an auxiliary weight block is installed on the drive belt.

In the above extrusion blow molding machine, two sets of counterweight assemblies are also installed on the frame, and the two sets of counterweight assemblies are connected to the two sets of extrusion blow mold opening and closing devices in a one-to-one correspondence.

In the above extrusion blow molding machine, the weight assembly includes a weight block and a connecting belt, a roller is installed on the frame, the connecting belt is sleeved on the roller, and the connecting belt and the weight block and extrusion blow molding The mold opening and closing device are connected.

In the above extrusion blow molding machine, the extrusion blow mold opening and closing device includes an opening and closing mold seat, a sliding seat and two opening and closing swing bars, and the opening and closing mold seat is connected to the machine through the second linear guide assembly. The sliding seat and the opening and closing mold seat are connected through the first linear guide assembly, and the driving part connected with the sliding seat is installed on the opening and closing mold seat; between the middle part of the opening and closing pendulum rod and the sliding seat Connected, one end of the opening and closing swing rod is installed with a half-mould mounting seat, the half mold of the extrusion blow mold is installed on the half-mould mounting seat, and the other end of the opening and closing swing rod and the opening and closing mold seat pass through the first rotating shaft Rotational connection; when the driving member drives the sliding seat to move along the guiding direction of the first linear guide assembly, one end of the two opening and closing pendulum rods approaches or moves away from each other. The extrusion blow mold opening and closing device makes one end of the opening and closing pendulum swing relative to the other end, which can increase the swing range of the half mold mounting seat, thereby increasing the two half molds when the extrusion blow mold is in the open state. The distance between them; whereby one set of extrusion blow molds in the closed state can pass between the two half-moulds in the other set of extrusion blow molds in the open state.

A method for processing a product using the above extrusion blow molding machine, characterized in that the method for processing a product using an extrusion blow molding machine comprises the following sequential steps;

In the first step, a set of extrusion blow molds in a closed state clamps the extruded raw material, and a drive assembly drives the extrusion blow mold in a closed state to move; and the drive assembly is manipulated to drive another set of extrusion blow molds in an open state. The mold moves so that the closed extrusion blow mold passes between the two half-moulds in the open extrusion blow mold until the raw material is located between the two half-moulds in the extrusion blow mold;

In the second step, control the driving member to switch the extrusion blow mold from the open state to the closed state; and control the driving component to drive the other set of extrusion blow molds to move in the direction of one set of extrusion blow molds, so that one set One end of the extrusion blow mold is butted with another set of extrusion blow molds.

In the above extrusion blow molding machine, in the first step, the driving component drives the extrusion blow mold in a closed state to move the extrusion blow mold to stretch the raw material.

Compared with the prior art, the extrusion blow molding machine can realize continuous production of products with only two sets of extrusion blow molds, and the required number of extrusion blow molds is significantly reduced, thereby significantly reducing the product manufacturing cost; The blow molding machine is especially suitable for the production of small batches.

In this extrusion blow molding machine, when the two sets of extrusion blow molds move up and down alternately, one set of extrusion blow molds in the closed state is directly removed from the two half molds in the other set of extrusion blow molds in the open state. Through passing between, the action steps of the extrusion blow molding machine are reduced, the structure 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.

In this extrusion blow molding machine, when the two sets of extrusion blow molds move up and down alternately, the moving speeds of the two sets of extrusion blow mold opening and closing devices can be controlled separately. The two sets of extrusion blow molds are connected more closely at the head and tail, and the connection efficiency is higher, thereby improving the production efficiency and product qualification rate.

Description of drawings

1 and 2 are schematic diagrams of the three-dimensional structure of the extrusion blow molding machine in different states.

FIG. 3 is a schematic three-dimensional structural diagram of the extrusion blow mold in the mold closing state on the extrusion blow mold opening and closing device.

FIG. 4 is a schematic bottom view of the extrusion blow mold in the mold closing state of the extrusion blow mold opening and closing device.

FIG. 5 is a schematic three-dimensional structural diagram of the extrusion blow mold in the mold opening state on the extrusion blow mold opening and closing device.

FIG. 6 is a schematic bottom view of the extrusion blow mold in the mold opening state of the extrusion blow mold opening and closing device.

In the figure, 1, frame; 2, extrusion blow mold; 2a, half mold; 2b, air injection mechanism; 3, extrusion blow mold opening and closing device; 3a, opening and closing mold seat; 3b, sliding seat 3c, opening and closing pendulum rod; 3d, the first linear guide assembly; 3e, driving part; 3f, the first shaft; 3g, connecting rod; 3h, the second shaft; 3i, the third shaft; 3j, half-mould installation Seat; 3k, fifth shaft; 4, second linear guide assembly; 5, drive assembly; 5a, motor; 5b, transmission belt; 5c, follower wheel; 5d, drive wheel; 6, counterweight assembly; 6a, counterweight block ; 6b, connecting belt; 6c, roller; 7, extrusion head; 8, raw material; 9, auxiliary counterweight.

Detailed ways

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

Embodiment 1: As shown in Figures 1 and 2, an extrusion blow molding machine includes a frame 1 and two sets of extrusion blow mold opening and closing devices 3, and two sets of extrusion blow mold opening and closing devices. 3 are arranged oppositely; a set of extrusion blow molds 2 is installed on each group of extrusion blow mold opening and closing devices 3 .

As shown in FIG. 3 to FIG. 6 , an extrusion blow molding mold opening and closing device 3 includes an opening and closing mold base 3a, a sliding base 3b and two opening and closing swing rods 3c.

Both sides of the sliding seat 3b and the opening and closing mold seat 3a are connected by the first linear guide assembly 3d, thereby improving the bearing capacity of the sliding seat 3b and the movement stability of the sliding seat 3b. The guiding direction of the first linear guide assembly 3d is a horizontal direction, so that the sliding seat 3b can move horizontally along the guiding direction of the first linear guide assembly 3d.

The driving member 3e connected with the sliding seat 3b is installed on the opening and closing mold base 3a; the driving member 3e is an oil cylinder or an air cylinder, and the cylinder body is rotatably connected with the opening and closing mold base 3a, and between the piston rod and the sliding seat 3b is also a The rotational connection can reduce the installation accuracy of the driving member 3e, and ensure the sliding flexibility and stability of the sliding seat 3b.

One end of the opening and closing swing rod 3c and the opening and closing mold base 3a are rotatably connected by the first rotating shaft 3f; the two opening and closing swing rods 3c share a first rotating shaft 3f, which can improve the opening and closing of the extrusion blow mold. The structure of the device 3 is compact and the manufacturing cost is reduced.

The middle part of the opening and closing swing rod 3c is connected with the sliding seat 3b. The accompanying drawings show that a connecting rod 3g is provided between the opening and closing swing rod 3c and the sliding seat 3b, and one end of the connecting rod 3g is between the opening and closing swing rod 3c. The second rotating shaft 3h is rotatably connected, and the other end of the connecting rod 3g and the sliding seat 3b are rotatably connected through the third rotating shaft 3i. 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 pendulum rod 3c to swing around the first rotating shaft 3f; it can be seen that this structure not only ensures that the sliding seat 3b can drive the opening and closing pendulum when moving. The rod 3c oscillates, and also conforms to the characteristics of a lever, and has a force-increasing effect, which can reduce the output force of the driving member 3e when ensuring the clamping force of the extrusion blow mold 2 .

The two opening and closing swing rods 3c are located between the two sets of first linear guide assemblies 3d, the opening and closing swing rods 3c are bent, and the two opening and closing swing rods 3c are arranged opposite to each other. The length of 3c can control the maximum distance between the other ends of the two opening and closing swing rods 3c.

The other end of the opening and closing swing rod 3c is mounted with a mold half mounting seat 3j, and the mold half mounting seat 3j is for mounting the mold half 2a of the extrusion blow mold 2 . The half-mould mounting seat 3j and the opening and closing swing rod 3c are rotatably connected through a fifth rotating shaft 3k. The extrusion blow mold opening and closing device 3 also includes an elastic member that can reset the half-mold mounting seat 3j, the elastic member is a torsion spring, the torsion spring is sleeved on the fifth rotating shaft 3k, and one end of the torsion spring is connected to the opening and closing swing rod. 3c is connected, and the other end of the torsion spring is connected with the half-mould mounting seat 3j. According to the actual situation, the spring member can also be 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-mould mounting seat 3j.

The first rotating shaft 3f is located between the half-mould mounting seat 3j and the sliding seat 3b, and the sliding seat 3b is located between the opening and closing swing rod 3c and the driving member 3e; this arrangement has the advantages of reasonable arrangement and simple structure, and the two half-mould mounting seats The space between 3j is large, and the above space satisfies the installation of the extrusion blow mold 2 and the two half-moulds 2a of the extrusion blow mold 2 in the closed state can be removed from the other group of the extrusion blow mold 2 in the open state. pass between.

The extrusion blow mold 2 includes two half-moulds 2a and a set of air injection mechanisms 2b, and the two half-moulds 2a and the two half-mould mounting seats 3j are installed in one-to-one correspondence; the air injection mechanism 2b is installed on the first rotating shaft 3f , the gas injection mechanism 2b can rotate with one of the half molds 2a. By explaining the opening and closing process of the extrusion blow mold 2, the functions and advantages of each component are further explained. As shown in Figures 3 and 4, the piston rod of the driving part 3e is in the extended state, and the extrusion blow mold 2 is in the clamping state; as shown in Figures 5 and 6, the piston rod of the driving part 3e is in the retracted state , the extrusion blow mold 2 is in the open state.

When the piston rod of the driving member 3e is gradually extended from the retracted state, the driving member 3e pushes the sliding seat 3b to move horizontally forward along the guiding direction of the first linear guide assembly 3d; the sliding seat 3b pushes the two connecting rods 3g to move synchronously And swing, the connecting rod 3g pushes the opening and closing swing rod 3c to rotate around the first rotating shaft 3f, the two opening and closing swing rods 3c synchronously and swing in opposite directions, and the distance between the other ends of the two opening and closing swing rods 3c gradually decreases The opening and closing pendulum rod 3c drives the half-mold mounting seat 3j and the half-mold 2a of the extrusion blow mold 2 to swing, so that not only the two half-molds 2a of the extrusion blow mold 2 are gradually moved closer to realize mold closing, but also the extrusion blow mold 2 is squeezed. The distance between the blowing mold 2 and the opening and closing mold base 3a is increased, and the extrusion blow mold 2 extends out of the opening and closing mold base 3a, which is convenient for processing products.

When the piston rod of the driving member 3e gradually retracts from the extended state, the driving member 3e pulls the sliding seat 3b to move horizontally backward along the guiding direction of the first linear guide assembly 3d; the sliding seat 3b pulls the two connecting rods 3g to move synchronously And swing, the connecting rod 3g pulls the opening and closing pendulum rod 3c to rotate around the first axis 3f, and the two opening and closing pendulum rods 3c synchronously and swing in opposite directions; The half-mould 2a of the mold 2 swings, and the distance between the other ends of the two opening and closing pendulum rods 3c gradually increases; this not only increases the gap between the two half-moulds 2a of the extrusion blow mold 2, but also realizes mold opening. It also reduces the distance between the extrusion blow mold 2 and the opening and closing mold base 3a, and partially shrinks the extrusion blow mold 2 to the opening and closing mold base 3a, which not only increases the distance between the two half-moulds 2a, but also reduces the occupied volume. , to avoid the interference of the movement of the two sets of extrusion blow molds 2.

The extrusion blow mold opening and closing device 3 can also reduce the overhang size of the extrusion blow mold 2 , thereby improving the installation stability of the extrusion blow mold 2 , and improving the upper and lower butt joint fit of the two sets of extrusion blow mold 2 . The above-mentioned structure of the extrusion blow mold opening and closing device 3 can make the extrusion blow mold 2 extend or retract, which can reduce the distance between the two groups of extrusion blow mold opening and closing devices 3, thereby improving the extrusion blow mold. The compactness of the plastic molding machine.

The left and right sides of the opening and closing mold base 3 a in the extrusion blow mold opening and closing device 3 are connected by the second linear guide assembly 4 ; thus, the bearing capacity and stability of the extrusion blow mold opening and closing device 3 are improved. The guiding direction of the second linear guide assembly 4 is the vertical direction, whereby the extrusion blow mold opening and closing device 3 can move up and down along the guiding direction of the second linear guide assembly 4 . The axis of the first rotating shaft 3f is set vertically, so that the two half-moulds 2a of the extrusion blow mold 2 are opened and closed horizontally, so that the raw material 8 in a vertical state can be used to extrude, which is beneficial to improve the quality of the product.

Two sets of drive assemblies 5 are installed on the frame 1, and the two sets of drive assemblies 5 are connected with the two sets of extrusion blow mold opening and closing devices 3 in one-to-one correspondence. The drive assembly 5 includes a motor 5a and a transmission belt 5b, the housing of the motor 5a is fixed on the frame 1, and the transmission belt 5b is connected with the opening and closing mold base 3a of the extrusion blow mold opening and closing device 3; The follower pulley 5c connected with the drive belt 5b, and the drive pulley 5d connected with the drive belt 5b are fixed on the rotating shaft of the motor 5a. By controlling the rotation direction and speed of the motor 5a, the extrusion blow mold opening and closing device 3 can be controlled to rise or fall, and the lifting speed can be adjusted; the speed of the upper and lower sets of extrusion blow molds 2 can be controlled separately, and then flexibly according to the actual situation. Adjust the speed to significantly improve the directionality of the end-to-end butt joint between the upper and lower sets of extrusion blow molds 2 . The motor 5a has a large rotational speed control range and high precision, thereby ensuring that the lowering speed of the blow mold opening and closing device is the same as the plastic extrusion speed or the blow mold opening and closing device lowering speed is greater than the plastic extrusion speed.

Two sets of counterweight assemblies 6 are also installed on the frame 1, and the two sets of counterweight assemblies 6 are connected with the two sets of extrusion blow mold opening and closing devices 3 in one-to-one correspondence. The counterweight assembly 6 includes a counterweight block 6a and a connecting belt 6b, a roller 6c is installed on the frame 1, the connecting belt 6b is sleeved on the roller 6c, and the connecting belt 6b is opened and closed with the counterweight block 6a and the extrusion blow mold. The opening and closing mold base 3a of the device 3 is connected. An auxiliary weight 9 is mounted on the transmission belt 5b. According to the gravity of the extrusion blow mold opening and closing device 3 and the extrusion blow mold 2, appropriate weights of the counterweight 6a and the auxiliary counterweight 9 are selected to significantly reduce the load on the motor 5a, which not only improves the speed regulation accuracy, but also improves the Extrusion blow mold opening and closing device 3 lifting flexibility and stability.

The slight elasticity of the transmission belt 5b is an objective existence. By controlling the transitional rotation of the motor 5a, it not only ensures that the upper and lower butted extrusion blow molds 2 are completely fitted, but also generates a certain pressure between the upper and lower sets of extrusion blow molds 2. This further significantly improves the end-to-end butt-jointness of the upper and lower sets of extrusion blow molds 2 .

When using the extrusion blow molding machine to process the product, 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 component 5 drives the extrusion blow mold opening and closing device 3 to reciprocate downward and upward; during the downward process, the extrusion blow mold 2 is in a closed state; during the upward process, the extrusion blow mold 2 is in the mold opening state. state.

By explaining several specific processes of processing products with extrusion blow molding machines, the functions and advantages of each component are further explained. For the convenience of description, the two groups of extrusion blow mold opening and closing devices 3 are respectively referred to as the first extrusion blow mold opening and closing device 3 and the second extrusion blow mold opening and closing device 3; The extrusion blow mold 2 on the blow mold opening and closing device 3 is called the first extrusion blow mold 2, and the extrusion blow mold 2 installed on the second extrusion blow mold opening and closing device 3 It is called the second extrusion blow mold 2; the drive assembly 5 connected with the first extrusion blow mold opening and closing device 3 is called the first drive assembly 5, which is connected with the second extrusion blow mold opening and closing device. The 3-phase connected drive assembly 5 is referred to as the second drive assembly 5 .

As shown in Fig. 1, the first extrusion blow mold 2 is located above the second extrusion blow mold 2, the first extrusion blow mold 2 is in a closed state, and the second extrusion blow mold 2 is in an open mold state. In this state, it is suitable for blow molding the raw material 8 in the first extrusion blow mold 2, and then blow molding the raw material 8 in the first extrusion blow mold 2 into a product. During the blow molding process of the first extrusion blow mold 2, it is also necessary to control the motor 5a in the first drive assembly 5 to rotate, so that the first drive assembly 5 drives the first extrusion blow mold opening and closing device 3 to continue downward. During this process, the second drive assembly 5 drives the second extrusion blow mold opening and closing device 3 to move upward, and the first extrusion blow mold 2 removes the two half molds from the second extrusion blow mold 2 2a; usually the first extrusion blow mold opening and closing device 3 moves downward at the same speed as the extrusion head 7 extrudes the raw material 8 .

The first extrusion blow mold opening and closing device 3 moves downward, and the second extrusion blow mold opening and closing device 3 moves upward to achieve the state shown in Figure 2; the second extrusion blow mold 2 is located at Above the first extrusion blow mold 2 .

After the blow molding machine is in the state shown in FIG. 2 , by manipulating the second driving assembly 5 and the driving part 3e in the second extrusion blow mold opening and closing device 3 , the upper end of the first extrusion blow mold 2 and the The lower ends of the second extrusion blow mold 2 are butted together, and the second extrusion blow mold 2 is closed. Before the two half-moulds 2a in the second extrusion blow mold 2 are closed, by controlling the rotational speed of the motor 5a in the first drive assembly 5, the first extrusion blow mold opening and closing device 3 moves downward faster than the extrusion blow mold. The speed of the extrusion head 7 extruding the raw material 8 is the same; thus the extruded raw material 8 is axially stretched, which is beneficial to reshape the molecular chain of the raw material 8 and improve the properties of the material, especially the transparency.

After the first extrusion blow mold 2 and the second extrusion blow mold 2 are both in the closed state, the motor 5a in the second drive assembly 5 is controlled to rotate, so that the second drive assembly 5 drives the second extrusion blow mold The mold opening and closing device 3 continues to move downward. During this process, it is suitable for blow molding 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 blow molded into product. During this process, the rotational speed of the motor 5a in the first drive assembly 5 is also increased, so that the downward movement speed of the first extrusion blow mold opening and closing device 3 is greater than that of the second extrusion blow mold opening and closing device 3. speed; whereby the first extrusion blow mold 2 is separated from the second extrusion blow mold 2 and the raw material 8 in the first extrusion blow mold 2 is separated from the raw material 8 in the second extrusion blow mold 2 Pull off.

After the first extrusion blow mold 2 is separated from the second extrusion blow mold 2, the driving part 3e in the first extrusion blow mold opening and closing device 3 is operated, and the first extrusion blow mold 2 is opened. The product in the first extrusion blow mold 2 is dropped.

Embodiment 2: The structure and principle of this embodiment are basically the same as those of Embodiment 1, and the basic similarities will not be described redundantly, only the different places will be described. In the connection structure between 3b, the opening and closing swing rod 3c and the sliding seat 3b are connected by a fourth rotating shaft, and the shaft hole of the sliding seat 3b is in the shape of a strip. When the sliding seat 3b moves, the sliding seat 3b drives the fourth rotating shaft to move, and the fourth rotating shaft drives the opening and closing swing rod 3c to swing around the first rotating shaft 3f; during this process, the fourth rotating shaft moves along the side wall of the shaft hole.

Claims (10)

An extrusion blow molding machine, comprising a frame, characterized in that the extrusion blow molding machine further comprises two groups of extrusion blow mold opening and closing devices (3), each group of extrusion blow mold opening and closing molds A set of extrusion blow molds (2) is installed on the device (3); two sets of extrusion blow mold opening and closing devices (3) are arranged oppositely, and the extrusion blow mold opening and closing devices (3) are connected to the frame. They are connected by a second linear guide assembly (4); when one set of extrusion blow molds (2) is in an open state, the other set of extrusion blow molds (2) is in a closed state, and one set of extrusion blow molds (2) is in a closed state, When the mold opening and closing device (3) moves relative to another group of extrusion blow mold opening and closing devices (3) along the guiding direction of the second linear guide assembly (4), the extrusion blow mold in a closed state (2) It is possible to pass between the two mold halves (2a) in the extrusion blow mold (2) in the open state. The device for opening and closing an extrusion blow mold according to claim 1, characterized in that the guiding direction of the second linear guide assembly (4) is the same as that of the two half molds (2a) of the extrusion blow mold (2). ) The mold opening and closing directions are set vertically. The extrusion blow molding die opening and closing device according to claim 1, characterized in that, two sets of counterweight assemblies (6) are further installed on the frame (1), and the two sets of counterweight assemblies (6) are connected to The two groups of extrusion blow mold opening and closing devices (3) are connected in one-to-one correspondence. The mold opening and closing device for extrusion blow molding according to claim 3, wherein the counterweight assembly (6) comprises a counterweight block (6a) and a connecting belt (6b), which are installed on the frame (1). There is a roller (6c), the connecting belt (6b) is sleeved on the roller (6c), and the connecting belt (6b) is connected with the counterweight (6a) and the extrusion blow mold opening and closing device (3). The extrusion blow mold opening and closing device according to claim 1, characterized in that the extrusion blow mold opening and closing device comprises an opening and closing mold seat (3a), a sliding seat (3b) and two opening and closing molds The swing rod (3c) is closed, and the mold opening and closing seat (3a) is connected with the frame through the second linear guide assembly (4); the sliding seat (3b) and the mold opening and closing seat (3a) are guided by the first straight line The components (3d) are connected, and the driving member (3e) connected with the sliding seat (3b) is installed on the opening and closing mold base (3a); Connecting, one end of the opening and closing swing rod (3c) is installed with a mold half mounting seat (3j), the mold half (2a) of the extrusion blow mold (2) is installed on the mold half mounting seat (3j), and the swing rod is opened and closed The other end of (3c) is rotatably connected with the opening and closing mold base (3a) through the first rotating shaft (3f); when the driving member (3e) drives the sliding base (3b) to guide the direction of the first linear guide assembly (3d) When moving, one end of the two opening and closing swing rods (3c) approaches or moves away from each other. The extrusion blow mold opening and closing device according to any one of claims 1 to 5, characterized in that, two sets of drive assemblies (5) including motors (5a) are mounted on the frame (1). , the two groups of driving components (5) are connected with the two groups of extrusion blow mold opening and closing devices (3) in one-to-one correspondence. The device for opening and closing an extrusion blow mold according to claim 6, characterized in that, the drive assembly (5) further comprises a transmission belt (5b), and the housing of the motor (5a) is fixed on the frame (1) , the rotating shaft of the motor (5a) and the extrusion blow mold opening and closing device (3) are connected by a transmission belt (5b). The extrusion blow mold opening and closing device according to claim 7, characterized in that a follower wheel (5c) is installed on the frame (1), and a transmission belt (5b) is sleeved on the follower wheel (5c) , an auxiliary counterweight is installed on the transmission belt (5b). A method for processing a product using an extrusion blow molding machine according to claim 6, 7 or 8, characterized in that the method for processing a product using an extrusion blow molding machine comprises the following sequential steps; In the first step, a set of extrusion blow molds (2) in a closed state clamps the extruded raw material, and a drive assembly (5) drives the closed extrusion blow mold (2) to move; and control the drive assembly (5) ) drives another set of extrusion blow molds (2) in the open state to move, so that the closed extrusion blow mold (2) is removed from the two half-molds in the open extrusion blow mold (2). Pass between (2a) until the two half-moulds (2a) in the open extrusion blow mold (2) are located on both sides of the raw material; In the second step, control the driving member (3e) to switch the extrusion blow mold (2) from the open state to the closed state; and control the driving component (5) to drive another set of extrusion blow molds (2) to a The set of extrusion blow molds (2) is moved in the direction, so that one end of one set of extrusion blow molds (2) is butted with the other set of extrusion blow molds (2). The method for processing a product using an extrusion blow molding machine according to claim 9, characterized in that, in the first step, when the driving component (5) drives the extrusion blow mold (2) in a closed state to move The extrusion blow mold (2) stretches the raw material.

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