A new installation and connection structure for the upper and lower barrels of a two-stage injection molding machine

Abstract

The utility model relates to a new type of installation and connection structure of the upper and lower barrels of a two-stage injection molding machine, comprising an injection mechanism, a lower barrel connected to the injection mechanism, a pre-plasticizing mechanism, a feeding mechanism connected to the pre-plasticizing mechanism, and an upper barrel connected to the feeding mechanism, wherein the pre-plasticizing mechanism and the upper barrel are located above the injection mechanism, and further comprising a sliding assembly and a connecting pipe, wherein the sliding assembly is used to connect the pre-plasticizing mechanism and the injection mechanism, and the connecting pipe connects the upper barrel and the lower barrel and is used to transport the molten plastic in the upper barrel to the lower barrel; the pre-plasticizing mechanism is slidingly installed on the top of the injection mechanism through the sliding assembly. With the above structure, when the upper barrel is heated and expanded during the use of the injection molding machine to generate a deformation amount, the deformation amount can be transmitted along the axial direction of the upper barrel toward the direction of the pre-plasticizing mechanism, so that the feeding mechanism and the pre-plasticizing mechanism connected to the upper barrel can be horizontally displaced at the top of the injection mechanism, thereby releasing the deformation force of the upper barrel.

Description

Technical Field

[0001] The invention relates to the field of injection molding machines, and in particular to a novel installation and connection structure of upper and lower barrels of a double-stage injection molding machine. Background Art

[0002] The two-stage injection molding machine is an efficient plastic molding equipment that combines the characteristics of extrusion molding and storage cylinders and can withstand large injection volumes. This injection molding machine is particularly suitable for heavy PP and HDPE connectors for injection molding gas or liquid delivery systems. The two-stage injection molding machine usually includes an upper barrel and a lower barrel. The upper barrel is used to pre-plasticize and melt the plastic, while the lower barrel is used to inject the molten plastic into the mold. This design allows the machine to perform different functions at different stages, thereby improving production efficiency and product quality.

[0003] Reference Figure 1 In the prior art, the upper barrel includes an upper barrel, a feeding mechanism and a pre-plasticizing mechanism, and the lower barrel includes a lower barrel and an injection mechanism. The pre-plasticizing mechanism is directly fixedly connected to the top of the injection mechanism by bolts, and the end of the upper barrel is connected to the end of the lower barrel by a connecting pipe, and the connecting pipe is installed vertically. During the use of the injection molding machine with the above structure, since the front and rear ends of the upper barrel are fixedly installed on the lower barrel, when the upper barrel is heated and expands, the deformation caused by the expansion has nowhere to be released, and the upper barrel is prone to deformation, resulting in reduced material melting effect. Utility Model Content

[0004] In order to solve the problem that when the upper barrel is heated and expands, the upper barrel is easily deformed, resulting in reduced material melting effect, the utility model provides a new installation connection structure for the upper and lower barrels of a two-stage injection molding machine.

[0005] The utility model provides a novel installation and connection structure of the upper and lower barrels of a two-stage injection molding machine, which adopts the following technical solutions:

[0006] A novel installation and connection structure for upper and lower barrels of a two-stage injection molding machine comprises an injection mechanism, a lower barrel connected to the front end of the injection mechanism, and a pre-plasticizing mechanism connected to the upper end of the injection mechanism, wherein a feeding mechanism is arranged on the pre-plasticizing mechanism, an upper barrel is arranged at the front end of the feeding mechanism, a connecting pipe for transferring materials to the lower barrel is arranged at the front end of the upper barrel, and a guiding sliding mechanism is arranged between the pre-plasticizing mechanism and the injection mechanism for allowing the pre-plasticizing mechanism to slide relative to the injection mechanism.

[0007] By adopting the above technical solution, one end of the upper barrel is fixedly connected to the lower barrel through a connecting pipe, and the pre-plasticizing mechanism is slidably installed on the top of the injection mechanism. When the upper barrel is heated and expanded during the use of the injection molding machine to generate a deformation amount, since one end of the upper barrel is fixed, the deformation amount is transmitted along the axial direction of the upper barrel toward the pre-plasticizing mechanism, so that the unloading mechanism and the pre-plasticizing mechanism connected to the upper barrel can be horizontally displaced at the top of the injection mechanism, so that the deformation force of the upper barrel can be released, and the upper barrel is not easily damaged.

[0008] Optionally, one end of the connecting tube connected to the lower barrel is inclined outwardly in a direction away from the upper barrel, and the axis of the connecting tube is parallel to the upper barrel and perpendicular to the axial plane of the injection mechanism.

[0009] By adopting the above technical solution, the connecting pipe is installed in an inclined manner. From the perspective of force analysis, since the upper and lower connections of the connecting pipe are at a certain angle, after the horizontal direction is subjected to the deformation force of the upper barrel, the force will be decomposed. The deformation force on the decomposed connecting pipe is smaller. Compared with the vertical setting of the connecting pipe, the above inclined connecting pipe is not easily damaged.

[0010] Optionally, the guide sliding mechanism includes a guide rail and a linear rail slider; the guide rail is arranged at the upper end of the injection mechanism and is parallel to the axial direction of the upper barrel; the linear rail slider is fixedly installed at the lower end of the pre-plasticizing mechanism and is embedded and slidingly matched with the guide rail.

[0011] By adopting the above technical solution, the preplastic mechanism slides on the injection mechanism through the guide sliding mechanism. Since the guide rail and the linear rail slider are relatively smooth, the friction of the preplastic mechanism is small when it moves on the injection mechanism. When the upper barrel is deformed and transmits the deformation force to the preplastic mechanism, the preplastic mechanism can slide on the injection mechanism more easily, thereby releasing the deformation force.

[0012] Optionally, the guide sliding mechanism further includes a limiting structure for limiting the relative displacement between the pre-plasticizing mechanism and the injection mechanism during transportation by the injection molding machine.

[0013] Optionally, the limiting structure includes a limiting block fixed on the side wall of the pre-plasticizing mechanism, a through hole opened on the limiting block and a limiting pin, and a locking groove is provided on the injection mechanism, and the limiting pin passes through the through hole and is plugged into and cooperates with the locking groove.

[0014] By adopting the above technical solution, when the injection molding machine is not in use or transported, the pre-molding mechanism and the injection mechanism are locked by the limit block, so that the two are not easily displaced by external forces and always maintain the initial state. In addition, through the locking method of the limit pin and the limit groove, the limit block is directly fixed to the top of the injection mechanism through the limit pin. When the injection molding machine is working, the limit pin is removed, and the pre-molding mechanism can slide relative to the injection mechanism. The above limit structure is relatively simple.

[0015] Optionally, the material discharge mechanism includes a funnel hopper, a hopper connecting pipe and a material discharge base which are sealed and connected in sequence from top to bottom, and two ends of the material discharge base are respectively sealed and connected to the pre-plasticizing mechanism and the upper barrel.

[0016] Optionally, a supporting component for increasing the load-bearing capacity of the material discharge base is provided between the material discharge base and the injection mechanism.

[0017] Optionally, the supporting component is a supporting seat, the supporting component is a supporting seat, the bottom of the supporting seat is fixedly connected to the upper end surface of the injection mechanism, and the upper end of the supporting seat is fitted with the bottom of the blanking base.

[0018] By adopting the above technical solution, due to the lack of supporting structure under the unloading mechanism, when the material is filled in the unloading mechanism, the weight of the unloading mechanism increases, which is easy to cause certain deformation to the upper barrel. By providing supporting components, the probability of the upper barrel being deformed by the weight of the unloading mechanism is reduced.

[0019] In summary, the utility model includes at least one of the following beneficial technical effects:

[0020] 1. A new type of installation and connection structure for the upper and lower barrels of a two-stage injection molding machine, in which the pre-plastic mechanism is slidably installed on the injection mechanism, and the upper barrel is connected and fixed with the lower barrel through a connecting pipe. When the upper barrel is heated and deformed, the pre-plastic mechanism can slide on the injection mechanism, thereby releasing the deformation of the upper barrel, and the upper barrel is not easily damaged;

[0021] 2. By setting a support seat, the support seat can support the unloading mechanism, so that after the unloading mechanism is filled with materials and the weight increases, the unloading mechanism is not easy to deform the upper barrel;

[0022] 3. The connecting pipe is installed in an inclined manner. When the upper barrel is heated and deformed, the connecting pipe will be decomposed after being subjected to the deformation force of the upper barrel in the horizontal direction. The deformation force on the decomposed connecting pipe is small, and the connecting pipe is not easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a two-stage injection molding machine in the prior art.

[0024] Figure 2 It is a schematic diagram of the overall structure of a new type of installation and connection structure of the upper and lower barrels of a two-stage injection molding machine according to an embodiment of the present application.

[0025] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0026] Figure 4 It is a structural schematic diagram of the guide sliding mechanism of Example 1 of the present application.

[0027] Figure 5 It is a structural schematic diagram of the limiting structure of Example 1 of the present application.

[0028] Figure 6 yes Figure 2 A partial enlarged view of point B in the middle.

[0029] Explanation of the reference numerals: 1. injection mechanism; 11. locking groove; 2. lower barrel; 3. unloading mechanism; 31. funnel hopper; 32. hopper pipe; 33. unloading base; 34. supporting component; 341. supporting seat; 3411. strip hole; 3412. fixing bolt; 4. pre-plasticizing mechanism; 5. upper barrel; 6. connecting pipe; 7. guide sliding mechanism; 71. guide rail; 711. limiting groove; 72. linear rail slider; 721. track groove; 722. limiting strip; 73. limiting structure; 731. limiting block; 732. through hole; 733. limiting pin. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-6 The utility model is described in further detail.

[0031] The utility model embodiment discloses a novel installation connection structure of an upper and lower barrel of a double-stage injection molding machine.

[0032] Reference Figure 2 A new type of installation and connection structure of the upper and lower barrels of a two-stage injection molding machine includes an injection mechanism 1, a lower barrel 2, a feeding mechanism 3, a pre-plasticizing mechanism 4 and an upper barrel 5. Among them, the feeding and pre-plasticizing device and the upper barrel 5 are located above the injection mechanism 1. The feeding mechanism 3 is used to fill solid materials, and the pre-plasticizing mechanism 4 is used to melt and plasticize the solid materials and convey them to the upper barrel 5. The molten plastic in the upper barrel 5 can enter the lower barrel 2, and the material is injected into the mold under the drive of the injection mechanism 1. Since the upper barrel 5 will be deformed when heated, in order to prevent the upper barrel 5 from being damaged by the deformation, an installation and connection structure is provided between the upper barrel 5 and the lower barrel 2 and between the pre-plasticizing mechanism 4 and the injection mechanism 1.

[0033] The upper barrel 5 and the lower barrel 2 are connected by a connecting pipe 6. The connecting pipe 6 is a hollow cylinder, and both ends of the connecting pipe 6 are sealed and connected to the end of the upper barrel 5 and the lower barrel 2 respectively by flange connection, so as to fix the upper barrel 5 on the lower barrel 2. The interior of the connecting pipe 6 is connected to the interior of the upper barrel 5, and the interior of the connecting pipe 6 is connected to the interior of the lower barrel 2, so that the molten material in the upper barrel 5 can enter the lower barrel 2 through the connecting pipe 6.

[0034] The end of the connecting tube 6 connected to the lower barrel 2 is tilted outwardly away from the upper barrel 5, and the axis of the connecting tube 6 is parallel to the axial plane of the upper barrel 5 and perpendicular to the injection mechanism 1. In this embodiment, the tilt angle is between 30° and 60°, preferably 45°. The connecting tube 6 is tilted, and when it is subjected to the axial deformation force generated by the upper barrel 5 due to heating, the connecting tube 6 can decompose the deformation force, so that the connecting tube 6 is less stressed and not easily damaged.

[0035] Reference Figure 2 and Figure 3 A guide sliding mechanism 7 is provided between the pre-plastic mechanism 4 and the injection mechanism 1, so that the pre-plastic mechanism 4 can slide relative to the injection mechanism 1. The guide sliding mechanism 7 includes a guide rail 71, a linear rail slider 72 and a limiting structure 73.

[0036] Reference Figure 3 and Figure 4 The guide rail 71 is fixed on the top of the injection mechanism 1 by screws and is arranged parallel to the axial direction of the upper barrel 5. There are two guide rails 71, which are symmetrically arranged on the top of the injection mechanism 1. The guide rail 71 is a rectangular strip, and the two sides thereof are symmetrically provided with limit grooves 711 along the length direction.

[0037] The linear rail slider 72 is installed at the bottom of the pre-plasticizing mechanism 4 by screw fixing. The linear rail slider 72 is a square block, which is provided with a rail groove 721 along the length direction, and the inner walls of both sides of the rail groove 721 are symmetrically provided with limit strips 722.

[0038] The shape of the track groove 721 matches the shape of the guide rail 71 and is used for the guide rail 71 to be inserted, and the linear rail slider 72 can slide on the guide rail 71 through the cooperation between the guide rail 71 and the track groove 721. The shape of the limit groove 711 matches the shape of the limit bar 722 and is used for the limit bar 722 to slide and insert.

[0039] When the linear rail slider 72 slides on the guide rail 71, the linear rail slider 72 can only slide horizontally. The vertical direction of the linear rail slider 72 is locked due to the cooperation between the limiting groove 711 and the limiting bar 722, so that the pre-plastic mechanism 4 is not easy to derail when moving on the injection mechanism 1.

[0040] Reference Figure 3 and Figure 5 The limiting structure 73 includes a limiting block 731 fixed on the side wall of the pre-plasticizing mechanism 4, a through hole 732 provided on the limiting block 731, and a limiting pin 733. The injection mechanism 1 is provided with a locking groove 11. The limiting pin 733 passes through the through hole 732 and is plugged into the locking groove 11.

[0041] When the limit pin 733 locks the limit block 731 at the top of the injection mechanism 1, relative slippage is not likely to occur between the pre-molding mechanism 4 and the injection mechanism 1. This state is suitable for when the injection molding machine is not in use or is being transported, so that the injection molding machine is always not easily affected by external forces and always maintains its initial state. When the injection molding machine is activated, the operator can remove the limit pin 733 with a tool, and the pre-molding mechanism 4 can slide on the injection mechanism 1 again.

[0042] Reference Figure 2 and Figure 6 The material discharge mechanism 3 includes a hopper 31, a hopper pipe 32 and a material discharge base 33, which are sealed and connected in sequence from top to bottom. The two ends of the material discharge base 33 are sealed and connected to the pre-plastic mechanism 4 and the upper barrel 5 respectively.

[0043] In order to increase the load-bearing performance of the material unloading base 33, a support component 34 is provided between the material unloading base 33 and the injection mechanism 1. In this embodiment, the support component 34 is a support seat 341, the top of the support seat 341 is connected to the bottom of the material unloading base 33 by screw fixing, and the bottom of the support seat 341 is fixedly connected to the top of the injection mechanism 1.

[0044] A strip hole 3411 is provided at the bottom of the support seat 341 along the length direction of the injection mechanism 1, and a fixing bolt 3412 is slidably arranged in the strip hole 3411. The fixing bolt 3412 is threadedly connected to the injection mechanism 1 so that the support seat 341 is pressed against the top of the injection mechanism 1, and the support seat 341 can produce a certain displacement in the horizontal direction, thereby adapting to the deformation displacement of the upper barrel 5.

[0045] The implementation principle of the new installation and connection structure of the upper and lower barrels of a two-stage injection molding machine in an embodiment of the utility model is as follows: the pre-plastic mechanism 4 is slidably installed on the injection mechanism 1, and the upper barrel 5 is connected and fixed to the lower barrel 2 through a connecting pipe 6. When the upper barrel 5 is heated and deformed, the upper barrel 5 can produce axial displacement, and the pre-plastic mechanism 4 can slide on the injection mechanism 1, thereby releasing the deformation of the upper barrel 5.

[0046] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A novel mounting and connecting structure for upper and lower barrels of a two-stage injection molding machine, comprising an injection mechanism (1), a lower barrel (2) connected to the front end of the injection mechanism (1), and a pre-plasticizing mechanism (4) connected to the upper end of the injection mechanism (1), wherein a material discharge mechanism (3) is arranged on the pre-plasticizing mechanism (4), an upper barrel (5) is arranged at the front end of the material discharge mechanism (3), and a connecting pipe (6) for transferring materials to the lower barrel (2) is arranged at the front end of the upper barrel (5), characterized in that: A guide sliding mechanism (7) is provided between the pre-plasticizing mechanism (4) and the injection mechanism (1) and is capable of allowing the pre-plasticizing mechanism (4) to slide relative to the injection mechanism (1).

2. According to claim 1, a novel installation and connection structure of the upper and lower barrels of a two-stage injection molding machine is characterized in that: The end of the connecting tube (6) connected to the lower barrel (2) is arranged to be inclined outward in a direction away from the upper barrel (5), and the axis of the connecting tube (6) is parallel to the upper barrel (5) and perpendicular to the axial plane of the injection mechanism (1).

3. A novel installation and connection structure for the upper and lower barrels of a two-stage injection molding machine according to claim 1, characterized in that: The guide sliding mechanism (7) comprises a guide rail (71) and a linear rail slider (72); the guide rail (71) is arranged at the upper end of the injection mechanism (1) and is parallel to the axial direction of the upper barrel (5); the linear rail slider (72) is fixedly installed at the lower end of the pre-plasticizing mechanism (4) and is embedded and slidingly matched with the guide rail (71).

4. A novel installation and connection structure for upper and lower barrels of a two-stage injection molding machine according to claim 3, characterized in that: The guide sliding mechanism (7) also includes a limiting structure (73) for limiting the relative displacement between the pre-plasticizing mechanism (4) and the injection mechanism (1) when the injection molding machine is transporting the pre-plasticizing mechanism (4).

5. A novel installation and connection structure for upper and lower barrels of a two-stage injection molding machine according to claim 4, characterized in that: The limiting structure (73) comprises a limiting block (731) fixed on the side wall of the pre-plasticizing mechanism (4), a through hole (732) provided on the limiting block (731), and a limiting pin (733); a locking groove (11) is provided on the injection mechanism (1); and the limiting pin (733) passes through the through hole (732) and is plugged into and matched with the locking groove (11).

6. The novel installation and connection structure of the upper and lower barrels of a two-stage injection molding machine according to claim 1 is characterized in that: The material discharge mechanism (3) comprises a funnel hopper (31), a hopper pipe (32) and a material discharge base (33) which are sealed and connected in sequence from top to bottom, and the two ends of the material discharge base (33) are respectively sealed and connected to the pre-plasticizing mechanism (4) and the upper barrel (5).

7. A novel installation and connection structure for upper and lower barrels of a two-stage injection molding machine according to claim 6, characterized in that: A supporting component (34) for increasing the load-bearing performance of the material discharge base (33) is provided between the material discharge base (33) and the injection mechanism (1).

8. A novel installation and connection structure for upper and lower barrels of a two-stage injection molding machine according to claim 7, characterized in that: The supporting component (34) is a supporting seat (341), the bottom of the supporting seat (341) is fixedly connected to the upper end surface of the injection mechanism (1), and the upper end of the supporting seat (341) is fitted with the bottom of the blanking base (33).

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