CN215512138U

CN215512138U - Large-capacity screw feeding device of injection molding machine

Info

Publication number: CN215512138U
Application number: CN202122009959.XU
Authority: CN
Inventors: 章焕红; 徐永健; 肖泽荣
Original assignee: Hangzhou Denai Machinery Co ltd
Current assignee: Hangzhou Denai Machinery Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2022-01-14
Anticipated expiration: 2031-08-25

Abstract

The utility model discloses a high-capacity screw feeding device of an injection molding machine, which comprises an upper template; the material-shortage warning device is characterized by further comprising a counterweight component arranged on the material cylinder fixing plate, a multi-stage sealing component arranged on the material pressing cylinder connecting flange and a material-shortage warning mechanism arranged on the material pressing cylinder. The utility model keeps the weight of both sides of the material cylinder fixing plate balanced by the arrangement of the counterweight component, and avoids the occurrence of deflection caused by unbalanced center after filling raw materials due to large capacity of the material storage cylinder; through multistage seal assembly's setting, increase the tightness of being connected between swager flange and the storage cylinder inner wall to increase the leakproofness, prevent to lead to producing because of the leakproofness is not good and leak, prevent that the raw materials from leaking out when receiving the swager flange extrusion and extruding.

Description

Large-capacity screw feeding device of injection molding machine

Technical Field

The utility model relates to an injection molding machine, in particular to a high-capacity screw feeding device of the injection molding machine.

Background

At present, the operation steps of the molding equipment of BMC (bulk molding compound, often called unsaturated polyester bulk molding compound) are as follows: firstly, putting raw materials into a storage cylinder, vacuumizing and exhausting; then, the same procedure as the traditional plastic molding procedure is carried out, namely mold closing → high pressure → injection → pressure maintaining → solidification molding → mold opening → ejection and product taking, thus forming a molding cycle. However, the BMC molding equipment at the present stage adopts a traditional screw storage and metering mode, and the damage rate of the screw to the glass fiber of the material in the process of melting the material reaches 35% -50%, so that the product strength is reduced by 35% -50%; in the use process of some vertical injection molding machines, the storage cylinder is positioned at one side, and the center of the whole body is unbalanced after raw materials are added into the storage cylinder, so that deviation is generated, and the normal work cannot be continued if the deviation is serious; when the feeding device is used, the material pressing cylinder is used for pushing the material pressing cylinder connecting flange, the raw materials in the storage cylinder flow into the material barrel through the downward pressure of the material pressing cylinder connecting flange, therefore, the sealing performance between the material pressing cylinder connecting flange and the storage cylinder is very important, if leakage occurs, part of the raw materials can be extruded to the upper portion of the material pressing cylinder connecting flange from the gap under extrusion, and feeding problems can be caused. Therefore, a large-capacity screw feeding device of the injection molding machine is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a high-capacity screw feeding device of an injection molding machine.

In order to achieve the purpose, the utility model provides a large-capacity screw feeding device of an injection molding machine, which comprises an upper template, a plurality of guide rods arranged on the upper template, a material cylinder fixing plate slidably mounted on the guide rods, a material storage cylinder mounted on the material cylinder fixing plate, a material pressing cylinder bracket mounted on the material cylinder fixing plate, a material pressing cylinder mounted on the material pressing cylinder bracket, a shooting cylinder mounted on the material pressing cylinder, a plunger rod arranged on the shooting cylinder, a motor assembly mounted at one end of the plunger rod, a screw in transmission connection with the motor assembly, a material cylinder mounted on the material cylinder fixing plate and a seat stand cylinder mounted on the material cylinder fixing plate and connected with the upper template; a material pressing rod is arranged on the material pressing cylinder, and a material pressing cylinder connecting flange which is in sliding connection with the material storage cylinder is arranged on the material pressing rod; the storage cylinder and the charging barrel are also provided with connecting flanges, and the storage cylinder and the charging barrel are connected through the connecting flanges; the material-shortage warning device is characterized by further comprising a counterweight component arranged on the material cylinder fixing plate, a multi-stage sealing component arranged on the material pressing cylinder connecting flange and a material-shortage warning mechanism arranged on the material pressing cylinder.

Further preferably, the counterweight assembly comprises a counterweight bracket mounted on the cartridge fixing plate and a counterweight block mounted on the counterweight bracket.

Further preferably, the motor assembly comprises a motor seat arranged at one end of the plunger rod and a motor arranged on the motor seat, the motor is in transmission connection with a screw rod, and the other end of the screw rod is positioned in the material barrel.

Preferably, the multistage sealing assembly comprises a multistage sealing ring arranged on the connecting flange of the material pressing cylinder, a sealing ring arranged on the connecting flange of the material pressing cylinder and a sealing ring gland which is arranged on the connecting flange of the material pressing cylinder through a bolt and is used for fixedly arranging the multistage sealing ring; one side of the sealing ring is attached to the inner wall of the storage cylinder, and the other side of the sealing ring is arranged to be an inclined plane.

Further preferably, one side of the multi-stage sealing ring is provided with a multi-stage sawtooth shape.

Further preferably, a guide step is further arranged on the connecting flange of the material pressing cylinder.

Preferably, the material shortage warning mechanism comprises a collision block connecting rod arranged on the connecting flange of the material pressing cylinder, a collision block arranged on the collision block connecting rod and an inductive switch arranged on the material pressing cylinder.

According to the utility model, through the arrangement of the counterweight component, the weights of two sides of the material cylinder fixing plate are kept balanced, and the phenomenon that the center is unbalanced and deflected due to the large capacity of the material storage cylinder after raw material filling is avoided;

the connection tightness between the connecting flange of the material pressing cylinder and the inner wall of the storage cylinder is increased through the arrangement of the multi-stage sealing assembly, so that the sealing performance is increased, the leakage caused by poor sealing performance is prevented, and the raw material is prevented from being extruded out of the material pressing cylinder when being extruded by the connecting flange of the material pressing cylinder;

through the setting of scarce material alarm mechanism, lack the material and report to the police and remind when lacking the material in pressing the material jar in real time, make the device have more intellectuality and maneuverability.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a part of an enlarged structure of a multi-stage sealing structure according to the present invention;

FIG. 3 is a partial structural schematic view from another perspective of the present invention;

fig. 4 is a schematic top view of the present invention.

Illustration of the drawings: 1. mounting a template; 2. a guide bar; 3. a material cylinder fixing plate; 31. a material pressing cylinder bracket; 32. a shooting cylinder bracket; 33. a charging barrel; 34. a seat cylinder; 4. a storage tank; 41. a connecting flange; 5. a material pressing cylinder; 51. a material pressing rod; 52. the material pressing cylinder is connected with a flange; 53. a guide step; 6. shooting a cylinder; 7. a motor assembly; 71. a screw; 72. a motor base; 73. a motor; 8. a counterweight assembly; 81. a counterweight bracket; 82. a balancing weight; 9. a multi-stage seal assembly; 91. a multi-stage seal ring; 92. a seal ring; 93. a sealing ring gland bush; 94. an inclined surface; 10. a starved alarm mechanism; 101. a bump connecting rod; 102. bumping blocks; 103. an inductive switch.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1-4, the large-capacity screw feeding device of the injection molding machine of the present embodiment includes an upper mold plate 1, a plurality of guide rods 2 disposed on the upper mold plate 1, a material cylinder fixing plate 3 slidably mounted on the guide rods 2, a material storage cylinder 4 mounted on the material cylinder fixing plate 3, a material cylinder support 31 mounted on the material cylinder fixing plate 3, a material pressing cylinder 5 mounted on the material cylinder support 31, a shooting cylinder support 32 mounted on the material pressing cylinder 5, a shooting cylinder 6 mounted on the shooting cylinder support 32, a plunger rod 61 disposed on the shooting cylinder 6, a motor assembly 7 mounted at one end of the plunger rod 61, a screw 71 drivingly connected to the motor assembly 7, a material cylinder 33 mounted on the material cylinder fixing plate 3, and a seat cylinder 34 mounted on the material cylinder fixing plate 3 and connected to the upper mold plate 1; a material pressing rod 51 is arranged on the material pressing cylinder 5, and a material pressing cylinder connecting flange 52 which is connected with the material storage cylinder 4 in a sliding manner is arranged on the material pressing rod 51; the storage cylinder 4 and the charging barrel 33 are also provided with connecting flanges 41, and the storage cylinder 4 and the charging barrel 33 are connected through the connecting flanges 41; the charging barrel sealing device is characterized by further comprising a counterweight component 8 arranged on the charging barrel fixing plate 3, a multi-stage sealing component 9 arranged on the material pressing cylinder connecting flange 52 and a material shortage alarm mechanism 10 arranged on the material pressing cylinder 5; through the arrangement of the counterweight assembly 8, the weights of the two sides of the charging barrel fixing plate 3 are kept balanced, and the phenomenon that the center is unbalanced and deflected due to the fact that the storage cylinder 4 is large in capacity and raw materials are filled is avoided; by the arrangement of the multi-stage sealing assembly 9, the connection tightness between the connecting flange 52 of the material pressing cylinder and the inner wall of the material storage cylinder 4 is increased, so that the sealing performance is increased, the leakage caused by poor sealing performance is prevented, and the raw material is prevented from being extruded out from the leakage when being extruded by the connecting flange 52 of the material pressing cylinder; through the setting of scarce material alarm mechanism 10, lack the material and report to the police and remind in real time when lacking the material in storage vat 4, make the device more intelligent and maneuverability.

Further, referring to fig. 1 and 4, the weight assembly 8 includes a weight holder 81 mounted on the cartridge fixing plate 3 and a weight 82 mounted on the weight holder 81; the counterweight bracket 81 is used for installing the counterweight 82 and connecting the counterweight 82 and the charging barrel fixing plate 3; through the setting of balancing weight 82, make feed cylinder fixed plate 3 both sides gravity balance, prevent to produce the deflection.

Further, referring to fig. 1, the motor assembly 7 comprises a motor base 72 mounted at one end of the plunger rod 61 and a motor 73 mounted on the motor base 72, the motor 73 is in transmission connection with a screw 71, and the other end of the screw 71 is located in the barrel 33; the screw 71 is rotated by the motor assembly 7, so that the raw material moves forward in the barrel 33 under the rotation of the screw 71.

Further, referring to fig. 1-2, the multi-stage sealing assembly 9 includes a multi-stage sealing ring 91 mounted on the connecting flange 52 of the material cylinder, a sealing ring 92 disposed on the connecting flange 52 of the material cylinder, and a sealing ring gland 93 mounted on the connecting flange 52 of the material cylinder by bolts for fixedly mounting the multi-stage sealing ring 91; one side of the sealing ring 92 is attached to the inner wall of the storage cylinder 4, and the other side is provided with an inclined surface 94; the multistage sealing rings 91 are convenient to mount and fix through the arrangement of the sealing ring gland 93; through the setting of sealing ring 92, and with its one side and the laminating of storage vat 4 inner wall, the opposite side sets up to inclined plane 94, when playing sealed effect between pressure cylinder flange 52 and the storage vat 4 inner wall, when pressure cylinder flange 52 moves down in storage vat 4, drive sealing ring 92 downwards, the action, sealing ring 92 scrapes the incomplete material that bonds on the storage vat 4 inner wall down when the downstream to play the guide effect to the incomplete material through inclined plane 94.

Further, referring to fig. 2, one side of the multistage sealing ring 91 is arranged in a multistage zigzag manner, and by arranging one side of the multistage sealing ring in a multistage zigzag manner, multi-point surface sealing is realized between the multistage sealing ring 91 and the inner wall of the storage cylinder 4, so that the sealing effect is better.

Further, referring to fig. 2, a guiding step 53 is further provided on the connecting flange 52 of the material pressing cylinder; by the provision of the guide step 53, the movement of the cylinder attachment flange 52 within the accumulator 4 is guided.

Further, referring to fig. 3-4, the short-feeding alarm mechanism 10 includes a bump connecting rod 101 mounted on the connecting flange 52 of the material pressing cylinder, a bump 102 mounted on the bump connecting rod 101, and an inductive switch 103 mounted on the material pressing cylinder 5; through bumping a connecting rod 101 and carrying out the up-and-down motion along with swager flange 52, bumping a 102 and then moving along with bumping a connecting rod 101, carry out the warning after inductive switch 103 senses bumping a 102 and remind, remind the staff to feed in to storage vat 4.

The working process of the utility model is as follows: referring to FIGS. 1-4, a quantity of dough mixture material is first pre-loaded into an accumulator 4; then starting the material pressing cylinder 5, wherein the material pressing cylinder 5 drives the material pressing cylinder connecting flange 52 to move downwards under the driving of hydraulic power, so that the space where the dough-like mixture raw material is located is further compressed, and strong pressure generates fluidity, so that the dough-like mixture raw material flows into the material barrel 33 along the connecting flange 41 of the material storage cylinder 4 and flows into the screw 71 tooth socket; meanwhile, the screw 71 realizes rotary motion under the driving force of the motor 73, so that the dough-like mixture moves forwards under the pushing of the screw 71, the volume of the dough-like mixture at the front end is increased, the screw 71 is forced to move upwards, the screw 71 continues to move upwards for a certain distance after the screw 71 moves upwards to a set position, and meanwhile, the material pressing cylinder 5 also moves upwards for a certain time, so that the pressure of the dough-like mixture in the material cylinder 33 at the present stage is reduced, and the overflowing of a material nozzle is reduced; meanwhile, the seat platform cylinder 34 moves upwards under the action of hydraulic power to drive the charging barrel fixing plate 3 to move upwards and drive the charging barrel 33 to move upwards, so that the charging nozzle is prevented from contacting a heat source for a long time to cause the front end to be solidified; after the dough-like mixture in the mold cavity is molded, performing thermosetting molding for a period of time; the molded product is processed by a series of processes (mold opening, ejection, mold closing, and the like); then the seat cylinder 34 moves downwards to make the material nozzle contact the feed inlet of the die to form a communicating vessel; the shooting pot 6 then moves downwards to force the dough mixture in the barrel 33 into the mould cavity until the pressure reaches equilibrium, the product is formed while maintaining the pressure, and then the above steps are repeated, and the cycle is repeated.

The scope of protection of the utility model is not limited to the above embodiments and variations thereof. The present invention is not limited to the above embodiments, but may be modified in various ways.

Claims

1. A large-capacity screw feeding device of an injection molding machine comprises an upper template (1), a plurality of guide rods (2) arranged on the upper template (1), a material cylinder fixing plate (3) slidably arranged on the guide rods (2), a material storage cylinder (4) arranged on the material cylinder fixing plate (3), a material pressing cylinder bracket (31) arranged on the material cylinder fixing plate (3), and a material pressing cylinder (5) arranged on the material pressing cylinder bracket (31), the injection cylinder fixing device comprises an injection cylinder support (32) arranged on a material pressing cylinder (5), an injection cylinder (6) arranged on the injection cylinder support (32), a plunger rod (61) arranged on the injection cylinder (6), a motor component (7) arranged at one end of the plunger rod (61), a screw rod (71) in transmission connection with the motor component (7), a material barrel (33) arranged on a material barrel fixing plate (3) and a seat stand cylinder (34) arranged on the material barrel fixing plate (3) and connected with an upper template (1); a material pressing rod (51) is arranged on the material pressing cylinder (5), and a material pressing cylinder connecting flange (52) which is connected with the material storage cylinder (4) in a sliding manner is arranged on the material pressing rod (51); the storage cylinder (4) and the charging barrel (33) are also provided with connecting flanges (41), and the storage cylinder (4) and the charging barrel (33) are connected through the connecting flanges (41); the charging barrel sealing device is characterized by further comprising a counterweight component (8) arranged on the charging barrel fixing plate (3), a multi-stage sealing component (9) arranged on the material pressing cylinder connecting flange (52) and a material shortage warning mechanism (10) arranged on the material pressing cylinder (5).

2. The high-capacity screw feeding device of the injection molding machine according to claim 1, wherein: the counterweight component (8) comprises a counterweight bracket (81) arranged on the charging barrel fixing plate (3) and a counterweight block (82) arranged on the counterweight bracket (81).

3. The high-capacity screw feeding device of the injection molding machine according to claim 1, wherein: the motor assembly (7) comprises a motor seat (72) arranged at one end of the plunger rod (61) and a motor (73) arranged on the motor seat (72), the motor (73) is in transmission connection with a screw rod (71), and the other end of the screw rod (71) is positioned in the material barrel (33).

4. The high-capacity screw feeding device of the injection molding machine according to claim 1, wherein: the multistage sealing assembly (9) comprises a multistage sealing ring (91) arranged on the connecting flange (52) of the material pressing cylinder, a sealing ring (92) arranged on the connecting flange (52) of the material pressing cylinder and a sealing ring gland (93) which is arranged on the connecting flange (52) of the material pressing cylinder through bolts and used for fixedly mounting the multistage sealing ring (91); one side of the sealing ring (92) is attached to the inner wall of the storage cylinder (4), and the other side of the sealing ring is provided with an inclined surface (94).

5. The high-capacity screw feeding device of the injection molding machine according to claim 4, wherein: one side of the multi-stage sealing ring (91) is arranged into a multi-stage sawtooth shape.

6. The high-capacity screw feeding device of the injection molding machine according to claim 4, wherein: and a guide step (53) is also arranged on the connecting flange (52) of the material pressing cylinder.

7. The high-capacity screw feeding device of the injection molding machine according to claim 1, wherein: the material shortage warning mechanism (10) comprises a collision block connecting rod (101) arranged on a material pressing cylinder connecting flange (52), a collision block (102) arranged on the collision block connecting rod (101) and an induction switch (103) arranged on the material pressing cylinder (5).