Injection assembly adaptive to BMC injection

Abstract

The utility model relates to the field of injection molding machine manufacturing, and discloses an injection assembly adaptive to BMC injection, which comprises an injection table front plate, a first cylinder and a pressing device, the first cylinder is detachably inserted at the front end of the injection table front plate and is provided with a first feed port butted with a first blanking channel of the injection table front plate, and the first feed port is provided with a second feed port butted with a second blanking channel of the injection table front plate; the pressing device is detachably installed at the upper end of the injection table front plate and provided with a discharging port in butt joint with the first discharging channel, the second machine barrel is detachably inserted into the front end of the injection table front plate when the first machine barrel is detached and used for BMC injection, a second feeding port is formed in the upper end of the middle of the second machine barrel, and an assembling base is detachably arranged on the second machine barrel; according to the injection assembly, the material pressing device is detachably installed at the upper end of the assembly base, the assembly base is provided with the second material falling channel in butt joint with the discharging port of the material pressing device and the second feeding port, the injection assembly can achieve switching of two injection modes without refitting an injection table front plate, the cost is controllable, and meanwhile the adaptability of equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine manufacturing, and in particular to an injection assembly adapted for BMC injection. Background Technology

[0002] The injection structure of a conventional injection molding machine includes a front plate of the injection unit, a barrel installed at the front end of the front plate of the injection unit, and a hopper installed at the upper end of the front plate of the injection unit. The front plate of the injection unit is mounted on a linear guide support, and the linear guide support slides along the linear guide. The front plate of the injection unit has material passages corresponding to the inlet of the barrel and the outlet of the pressing device, respectively.

[0003] Existing injection molding structures cannot automatically feed BMC material, requiring a switch to a compression device. Furthermore, since BMC material does not require a long plasticizing time, prolonged residence time in the barrel can lead to material solidification and deformation. This necessitates shortening the screw's length-to-diameter ratio (length-to-diameter ratio = distance from inlet to nozzle / screw outer diameter) to achieve rapid BMC discharge. Existing modification methods refer to... Figure 1 As shown, the barrel needs to be replaced with a size that matches the screw's length-to-diameter ratio, i.e., the barrel length is shortened. The front plate of the injection unit extends the shortened distance of the barrel towards the injection mold plate. The original material passage surface is milled and sealed. A new material passage is opened on the newly extended part. The pressure device is installed above the subsequently modified material passage. This method requires a major modification to the front plate of the injection unit and has problems such as insufficient installation space for the pressure device, high modification cost, and inability to switch to the conventional mode. Utility Model Content

[0004] This invention addresses the shortcomings of existing injection components adapted for BMC material injection molding, such as insufficient installation space for the material pressing device, high modification costs, and inability to switch to conventional mode. It provides an injection component that can be used for both conventional injection molding and BMC material injection molding without shortening the installation space or modifying the injection station front plate.

[0005] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0006] An injection assembly adapted for BMC injection includes a front plate of an injection stage, a first barrel, and a pressing device. The first barrel is detachably inserted into the front end of the front plate of the injection stage and has a first inlet that connects with a first discharge channel of the front plate of the injection stage. The pressing device is detachably installed on the upper end of the front plate of the injection stage and has an outlet that connects with the first discharge channel. The assembly also includes a second barrel that is detachably inserted into the front end of the front plate of the injection stage when the first barrel is disassembled and is used for BMC injection. The upper end of the middle part of the second barrel has a second inlet. A mounting base is detachably installed on the second barrel. The upper end of the mounting base can be detachably installed with the pressing device that has been removed from the front plate of the injection stage, and the mounting base has a second discharge channel that connects with the outlet and the second inlet.

[0007] Using the above scheme, the injection assembly is equipped with a first barrel and a second barrel. When the first barrel is installed, it is inserted into the front end of the injection station front plate, and the pressure device is installed on the upper end of the injection station front plate. This installation mode is the conventional injection mode. When the second barrel is installed, it is inserted into the front end of the injection station front plate, and the pressure device is installed on the mounting base. This installation mode is the BMC material injection mode. This injection assembly can achieve the switching between the two injection modes without modifying the injection station front plate, improving the adaptability of the equipment while keeping costs under control.

[0008] Preferably, the front plate of the firing table is fixed on the guide rail seat, and a support plate for bearing the weight of the assembly seat is provided between the guide rail seat and the assembly seat.

[0009] By adopting the above scheme, the setting of the support plate relieves the pressure of the pressing device on the second barrel, reducing the probability of the second barrel being deformed by external forces.

[0010] Preferably, the support plate is detachably fixed to the upper end of the guide rail seat by the second bolt, and its upper end face fits against the bottom of the mounting seat.

[0011] With the above solution, the spacing between the mounting base and the guide rail base varies for different models of injection molding machines. After the support plate and the mounting base are detachably connected, multiple machine models can be adapted by replacing the support plate, further improving compatibility.

[0012] Preferably, the upper end of the second material discharge channel is fitted with a sealing ring to achieve a sealed connection with the discharge port of the pressing device.

[0013] By adopting the above solution and adding a sealing ring, leakage can be effectively prevented.

[0014] Preferably, the second barrel is fixed to the mounting base by a second bolt.

[0015] Preferably, a positioning structure is provided between the second barrel and the mounting base to preposition the two. The positioning structure includes a positioning pin, which passes through the mounting base and engages with a positioning groove on the second barrel.

[0016] Using the above scheme, the locating pin first restricts the axial movement of the mounting base on the second barrel, and then the second bolt is used to lock the two together.

[0017] Preferably, when the pressing device is installed on the mounting base, a support frame is detachably connected between the side wall of the pressing device and the upper end face of the second material discharge channel.

[0018] Using the above solution, the support frame is used to assist in supporting the pressing device and prevent it from tipping over. During installation, it can be directly connected to the assembly hole of the pressing device that was originally installed on the front plate of the firing table, without the need to modify the front plate of the firing table.

[0019] This utility model, by adopting the above technical solutions, has significant technical effects: the injection assembly is equipped with a first barrel and a second barrel. When the first barrel is installed, it is inserted and installed at the front end of the injection table front plate, and the pressing device is installed at the upper end of the injection table front plate. This installation mode is the conventional injection mode. When the second barrel is installed, it is inserted and installed at the front end of the injection table front plate, and the pressing device is installed on the mounting base. This installation mode is the BMC material injection mode. This injection assembly can achieve the switching between the two injection modes without modifying the injection table front plate, improving the adaptability of the equipment while keeping costs under control. Attached Figure Description

[0020] Figure 1 This is an isometric drawing of an existing injection assembly suitable for BMC injection;

[0021] Figure 2 This is an isometric view of the injection component adapted for BMC injection in this embodiment when it switches to BMC injection mode;

[0022] Figure 3 This is the main view of the injection component adapted for BMC injection in this embodiment when it switches to BMC injection mode;

[0023] Figure 4 yes Figure 3 A sectional view of AA;

[0024] Figure 5 This is an isometric view of the BMC injection component in this embodiment when it is switched to the conventional injection mode.

[0025] Figure 6 This is a cross-sectional view of the injection component adapted for BMC injection in this embodiment when switched to the conventional injection mode.

[0026] The parts referred to by the numbers in the above attached figures are as follows: 1. Front plate of the injection table; 2. Pressing device; 3. Guide rail; 4. Guide rail seat; 5. Hopper; 6. First barrel; 601. First feed inlet; 7. First discharge channel; 8. Second barrel; 801. Second feed inlet; 9. Assembly seat; 901. Second discharge channel; 10. Sealing ring; 11. Positioning pin; 12. Second bolt; 13. Support plate; 14. Support frame; 15. Mounting plate. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0028] An injection component adapted for BMC injection, as described above. Figures 2-6 As shown, it includes a front plate 1 for the injection stage, a first barrel 6, a second barrel 8, and a hopper 5.

[0029] The front end of the front plate 1 of the firing platform is provided with a slot for partial insertion of the tail of the first barrel 6 or the second barrel 8. After the end of the first barrel 6 away from the nozzle is inserted into the slot, it is detachably and fixedly connected to the front plate 1 of the firing platform by locking screws.

[0030] The upper end of the front plate 1 of the injection stage is provided with a first material discharge channel 7 that communicates with the slot. The hopper 5 and the first material discharge channel 7 are detachably fixedly connected by locking screws. After the first barrel 6 is inserted into the slot, the first material discharge channel 7 is connected to the first feed port 601 of the first barrel 6 and the discharge port of the hopper 5 respectively.

[0031] After the end of the second barrel 8 away from the nozzle is inserted into the slot, it is detachably fixed to the front plate 1 of the injection station by locking screws. The middle part of the second barrel 8 is fitted with an assembly seat 9. The assembly seat 9 and the second barrel 8 are first axially limited by a positioning pin 11. After the positioning pin passes through the assembly seat 9, it is inserted into the positioning groove on the second barrel 8. Then, the two are fixedly connected by a second bolt 12. The upper part of the assembly seat 9 has a vertically penetrating second material discharge channel 901. The through groove on the assembly seat 9 for the second barrel 8 to pass through is connected to the second material discharge channel 901. The upper part of the middle part of the second barrel 8 is provided with a second feed port 801 that docks with the second material discharge channel 901. The upper end of the assembly seat 9 is detachably fixed with a pressing device 2 by a second bolt 12. The upper end of the second material discharge channel 901 docks with the discharge port of the pressing device 2. A sealing ring 10 is embedded in the upper end of the second material discharge channel 901 to achieve a sealed docking with the discharge port of the pressing device 2.

[0032] The front plate 1 of the firing platform is fixed on the guide rail seat 4. A support plate 13 for bearing the weight of the assembly seat 9 is provided between the guide rail seat 4 and the assembly seat 9. The support plate 13 is detachably fixed to the upper end face of the guide rail seat 4 by the first bolt, and its upper end face fits against the bottom of the assembly seat 9.

[0033] A mounting plate 15 is vertically welded to the side wall of the pressing device 2. When the pressing device 2 is installed on the mounting base 9, the mounting plate 15 and the upper end of the first material discharge channel 7 are detachably and fixedly connected by screws or bolts and other connecting parts to a support frame 14 for auxiliary support of the pressing device 2.

[0034] The injection assembly is equipped with a first barrel 6, a second barrel 8, a hopper 5, and a pressing device 2. When installing the first barrel 6, refer to... Figures 5-6 As shown, the first barrel 6 is inserted and installed at the front end of the injection table front plate 1, and the hopper 5 is installed on the upper end of the injection table front plate 1. This installation mode is the conventional injection mode; when installing the second barrel 8, refer to... Figures 2-4 As shown, the second barrel 8 is inserted and installed at the front end of the injection table front plate 1, and the pressing device 2 is installed on the mounting base 9. This installation mode is the BMC material injection mode. The above injection components do not need to be modified in the injection table front plate 1, and can also realize the switching between two injection modes. The cost is controllable while improving the adaptability of the equipment.

[0035] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An injection assembly adapted for BMC injection, comprising a front plate of an injection stage (1), a first barrel (6), and a hopper (5), wherein the first barrel (6) is detachably inserted into the front end of the front plate of the injection stage (1) and the first barrel (6) is provided with a first feed inlet (601) that connects with a first discharge channel (7) of the front plate of the injection stage (1), and the hopper (5) is detachably installed on the upper end of the front plate of the injection stage (1) and connects with the first discharge channel (7), characterized in that: It also includes a second barrel (8) that can be detachably inserted into the front end of the injection table front plate (1) when the first barrel (6) is disassembled and is used for BMC injection. The second barrel (8) has a second feed port (801) at the upper middle part. A mounting base (9) is detachably provided on the second barrel (8). A pressing device (2) is detachably installed on the upper end of the mounting base (9). The mounting base (9) has a second discharge channel (901) that connects with the discharge port of the pressing device (2) and the second feed port (801).

2. The injection assembly adapted for BMC injection according to claim 1, characterized in that: The front plate (1) of the firing platform is fixed on the guide rail seat (4), and a support plate (13) for bearing the weight of the assembly seat (9) is provided between the guide rail seat (4) and the assembly seat (9).

3. The injection assembly adapted for BMC injection according to claim 2, characterized in that: The support plate (13) is detachably fixed to the upper end of the guide rail seat (4) by the first bolt, and its upper end face fits against the bottom of the mounting seat (9).

4. The injection assembly adapted for BMC injection according to claim 1, characterized in that: The upper end of the second material discharge channel (901) is fitted with a sealing ring (10) to achieve a sealed connection with the discharge port of the pressing device (2).

5. An injection assembly adapted for BMC injection according to claim 1, characterized in that: The second barrel (8) is fixed to the mounting base (9) by the second bolt (12).

6. An injection assembly adapted for BMC injection according to claim 5, characterized in that: A positioning structure is provided between the second barrel (8) and the mounting base (9) to pre-position both. The positioning structure includes a positioning pin (11), which passes through the mounting base (9) and engages with the positioning groove on the second barrel (8).

7. An injection assembly adapted for BMC injection according to claim 1, characterized in that: When the pressing device (2) is installed on the mounting base (9), a support frame (14) is detachably connected between the side wall of the pressing device (2) and the upper end face of the second material drop channel (901).

Images