TWM604704U - Plastic metering and feeding device - Google Patents

Abstract

A plastic metering and feeding device is provided with a feeding head. An injection flow channel and an air flow channel are formed inside the feeding head. The injection flow channel is connected to an injection port at the bottom of the feeding head, and the air flow channel is connected to the inlet There is a blowing hole at the bottom of the material head, and the blowing hole is ring-shaped. A chute assembly is provided at the bottom of the feed head. The chute assembly has a chute corresponding to the position of the injection port and the blowing hole. In the chute, the slide plate has an upper surface, a lower surface, and a circular metering groove that penetrates the upper and lower surfaces. The slide plate can be pushed to move along the chute, so that the metering groove can be positioned at the injection port or The location of one of the blow holes.

Description

Plastic metering and feeding device

This creation is related to a resin material molding device that uses hot pressing to make optical lenses, especially a plastic metering and feeding device that can ensure its accurate metering effect.

According to the conventional method of manufacturing optical lenses with resin, it can be mainly divided into injection molding and compression (hot pressing) molding. Among them, injection molding is to squeeze molten resin material into the injection molding mold, and the injection molding mold Mold cavity and runner with corresponding lens shape and size, mold cavity and runner communicate, and form gate at the junction of mold cavity and runner, but injection molding mold is limited by runner, gate and cavity in size Due to the above limitation, it is difficult to mold resin materials into small-sized optical lenses, and in order to ensure that the resin material can be reliably filled in the mold cavity, the injected resin material must be properly pre-filled during the injection molding process. However, this will cause the density and stress of the manufactured lens to be different, which will affect the imaging quality of the optical lens.

In order to improve the aforementioned problems of optical lenses made by injection molding, the applicant in this case has developed a method for making optical lenses by hot-press molding technology. The optical lens can be made by hot-press molding using a predetermined amount of resin material. It can effectively solve the problem of inconsistency in density and stress when conventional injection molding is made into optical lenses. For example, China's new patent No. M510843 discloses a resin material molding device for quantitative shaping and hot pressing to make optical lenses. It mainly uses a metering groove on a template to accept the molten state from the injection nozzle. Then make the template slide to the relative position of a blowing hole, and then blow clean hot air to the metering groove through the blowing hole, so that the resin material can be separated from the metering groove for subsequent thermocompression molding In order to make an optical lens; however, in the actual implementation of the patent, when the resin material in a molten state is injected into the metering groove from the injection nozzle, then it is driven by the template to slide to the relative position of the blowing hole. , The resin material will be cooled from the original melting temperature (Temperature Melting, TM temperature) to a rubbery state slightly lower than the TM temperature, so the viscosity of the resin material will increase relatively, so when the metering groove is blown through the blow hole , There will still be some resin materials remaining on the inner periphery of the metering tank, and the resin material in the metering tank cannot be blown off reliably. Therefore, the resin material still has errors in the measurement and is not accurate enough.

In view of this, how to solve the above problems is the main problem that this creation intends to solve.

The main purpose of this creation is to provide a plastic metering and feeding device, which has the effect of reliably separating the resin material from the metering tank to achieve precise metering.

To achieve the foregoing purpose, this creation provides a plastic metering and feeding device, including: An inlet, an injection channel and an air channel are formed inside, the injection channel is connected to an injection port at the bottom of the inlet, and the air channel is connected to the bottom of the inlet One blow hole of, and the blow hole is ring-shaped; A chute assembly arranged at the bottom of the feeding head, the chute assembly has a chute corresponding to the position of the injection port and the blowing hole; A sliding plate is slidably arranged in the sliding groove. The sliding plate has an upper surface, a lower surface, and a circular metering groove penetrating the upper surface and the lower surface, and the sliding plate can be pushed along the sliding groove Displacement, so that the metering groove can be correspondingly located at one of the injection port or the blowing hole.

Preferably, an injection chamber is further connected between the injection channel and the injection port, and a push rod is correspondingly penetrated in the injection chamber, and by driving the push rod to push toward the injection port, The resin material in the injection chamber can be output from the injection port. Furthermore, at least one heater is installed beside the injection chamber to maintain the temperature of the resin material in the injection chamber.

Preferably, an insert is provided in the blowing hole, the insert has a head end and a body with an outer diameter smaller than the head end, the head end is provided with a communicating hole, and one end of the communicating hole can be connected to the air passage The other end of the communicating hole can be connected to the blowing hole, and the outer diameter of the body is smaller than the inner diameter of the blowing hole, so that an annular space can be formed between the blowing hole and the insert.

Preferably, the chute assembly has a bottom plate, and two side plates arranged side by side and spaced apart are connected to the bottom plate, so that the chute extending in a predetermined direction can be formed between the two side plates. A through hole penetrates through the bottom plate relative to the blow hole.

Preferably, the bottom of the feed head is oppositely provided with a base, the base is provided with the injection port and the blowing hole through the base, the sliding plate is connected with a pulling piece at one end, and the pulling piece is used to connect with A transmission unit is connected, and can be used to drive the pulling member to move back and forth. When the transmission unit drives the pulling member to move, it can synchronously drive the sliding plate to move along the sliding groove, so that the metering groove on the sliding plate can be The corresponding position is at one of the injection port or the blowing hole.

It is not difficult to gain an in-depth understanding of the above-mentioned objectives and advantages of this creation from the detailed description and drawings of the selected embodiments below.

First of all, please refer to Figures 1~3. The plastic metering and feeding device provided by this creation is mainly composed of a feeding head 11, a chute assembly 21 and a sliding plate 31. Among them:

The feeding head 11 is used to connect with the discharge port 52 of a discharging mechanism 51. The discharging mechanism 51 can heat a resin material to its melting temperature (Temperature Melting, TM temperature), so that the resin material becomes In a molten state, a screw 53 is used to stir and convey the molten resin material to the discharge port 52 for output. An injection flow passage 12 and an air flow passage 13 are formed inside the feed head 11, and the feed head 11 is connected to the discharge port 52 of the discharge mechanism 51 with one end of the feed flow passage 12 , And opposite to the bottom of the feed head 11 is provided with a base 14 therethrough is provided with an injection port 141 communicating with the other end of the injection channel 12, and an air channel 13 communicated with The blowing hole 142 is annular. In this embodiment, a longitudinally extending injection chamber 15 is further connected between the injection channel 12 and the injection port 141, and a push rod 151 is correspondingly penetrated in the injection chamber 15, by driving The push rod 151 is pushed toward the injection port 141, so that the resin material in the injection chamber 15 can be output from the injection port 141, and at least one heater is penetrated by the injection chamber 15 16. It can be used to maintain the temperature of the resin material in the injection chamber 15; and further, an insert 18 is provided in the blowing hole 142, the insert 18 has a head end 181 and a body whose outer diameter is smaller than the head end 181 Part 182, the head end 181 is provided with a communicating hole 183, one end of the communicating hole 183 can be communicated with the air channel 13, the other end of the communicating hole 183 can be communicated with the blowing hole 142, and the body The outer diameter of the portion 182 is smaller than the inner diameter of the blowing hole 142, so that an annular space 19 can be formed between the blowing hole 142 and the insert 18.

The sliding groove assembly 21 is oppositely connected to the bottom surface of the base 14, and the sliding groove assembly 21 has a sliding groove 22 corresponding to the positions of the injection port 141 and the blowing hole 142. In this embodiment, the chute assembly 21 has a bottom plate 23, and two side plates 24 arranged side by side and spaced apart are connected to the bottom plate 23, so that a predetermined edge can be formed between the two side plates 24 The sliding groove 22 extends in the direction, and a through hole 231 penetrates through the bottom plate 23 relative to the blow hole 142.

The sliding plate 31 is in the shape of a long plate and is used to slide in the sliding groove 22. The sliding plate 31 has an upper surface 32, a lower surface 33, and a circular shape that penetrates both the upper surface 32 and the lower surface. The metering groove 34 of 33, and the sliding plate 31 can be pushed to move along the sliding groove 22, so that the metering groove 34 can be located at one of the injection port 141 or the blowing hole 142. In this embodiment, one end of the sliding plate 31 is connected with a pulling member 41, and the pulling member is used to connect with a piston rod 431 of a transmission unit 43 (for example, a hydraulic cylinder), and can be used to drive the The pulling member 41 moves in a straight line, and when the transmission unit 43 drives the pulling member 41 to move, it can synchronously drive the sliding plate 31 to move along the sliding groove 22, so that the metering groove 34 on the sliding plate 31 can correspondingly be positioned there. The position of one of the injection port 141 or the blowing hole 142, and the opening position of the blowing hole 142 in a ring shape corresponds to the position of the inner periphery of the metering groove 34.

In actual use, the plastic metering and feeding device composed of the above-mentioned structure, as shown in FIG. 4, can directly use the plastic metering and feeding device provided by this invention with a hot press molding mold 61. First, the feed head 11 is placed in the hot press forming mold 61 between the upper mold 62 and the lower mold 63 after the mold is opened, and the through hole 231 of the bottom plate 23 of the chute assembly 21 and the mold of the lower mold 63 The holes 631 are arranged opposite to each other up and down. Next, referring to Figures 1 and 4, the resin material is heated to its melting temperature (Temperature Melting, TM temperature) through the discharging mechanism 51, and the screw 53 is used to stir and convey the molten resin material to the discharge port 52 output, so that the melted resin material can sequentially enter the injection channel 12 and the injection chamber 15 through the discharge port 52. At this time, the sliding plate 31 is drawn by the pulling member 41, and the sliding plate The metering groove 34 of 31 is located at a relatively lower position of the injection port 141; then, as shown in Figure 5, the push rod 151 is driven to push down the resin material located in the injection chamber 15, so that the resin material can be pushed Squeeze and pour down into the metering groove 34, and by pre-setting the volume and shape of the metering groove 34, it can be filled into quantitatively shaped resin granules A, and through the pushing of the push rod 151, it can be more It is true that the resin material is filled in the metering groove 34 to prevent the resin material in the metering groove 34 from being filled incompletely and causing subsequent measurement errors.

Then, as shown in Fig. 6, after the metering tank 34 completes the above-mentioned filling action of the resin pellets A, the driving unit 41 is driven to move through the transmission unit 43, and the sliding plate 31 can be synchronously driven along the slide rail 22 Displacement, so that the metering groove 34 on the sliding plate 31 can be relatively moved to a relatively lower position of the blowing hole 142, and the injection port 141 is relatively closed by the end surface of the sliding plate 31; then, as shown in Figure 7, A blowing device (not shown in the figure) is used to intermittently blow air to the air flow passage 13 through an air inlet 17 of the feed head 11, so that the air can sequentially pass through the air flow passage 13 and the air flow passage 13 The blowing hole 142 is blown out toward the metering groove 34, and the annular space 19 through the blowing hole 142 is annular, so when the air is blown out from the blowing hole 142, an annular pressurized airflow can be formed relatively , And can directly generate a downward thrust on the circumference of the resin granular material A located in the measuring groove 34, and thereby can effectively overcome the adhesion of the resin granular material A attached to the inner periphery of the measuring groove 34 due to cooling. Therefore, the resin pellets A located in the measuring groove 34 can be reliably separated from the measuring groove 34 without leaving any residue, and fall down through the through hole 231 into the cavity 631 of the lower mold 63, and finally only need to be The hot pressing mold 61 is rotated away from the feed head 11, and the upper mold 62 and the lower mold 63 can perform the subsequent mold clamping and hot pressing process.

From the above description, it can be seen that the plastic metering and feeding device provided by this creation uses the base 14 of the feeding head 11 to have an annular blowing hole 142, so that when air is blown out from the blowing hole 142, a relatively formed The ring-shaped pressurized air flow can directly generate a downward thrust on the circumference of the resin granular material A in the metering groove 34, so even if the resin granular material A in the metering groove 34 is being transported The increase in viscosity caused by the decrease in temperature can still ensure that the resin granular material A located in the metering groove 34 can be reliably separated from the metering groove 34 without leaving any residue, and the effect of accurate metering can be ensured.

In addition, the slide rail assembly 21 of this invention is composed of a bottom plate 23 and two side plates 24 overlapping each other, so that the two side plates 24 can be manufactured separately in processing, and the processing accuracy of the two side plates 24 can be ensured, and in practice The thickness of the slide plate 31 is usually increased or decreased to change the volume of the metering groove 34. Therefore, when the slide plate 31 with a different volume of the metering groove 34 needs to be replaced in actual manufacturing, the two side plates of the slide rail assembly 21 provided by this creation 24 can also be replaced with a corresponding thickness according to actual needs, so that the slide rail assembly 21 of the present invention has the function of being able to respond to various different metering tank volumes.

However, the disclosure of the above embodiments is only used to illustrate the creation, not to limit the creation, so any changes in values or replacement of equivalent components should still belong to the scope of the creation.

To sum up, when people who are familiar with this art know that this creation can indeed achieve the aforementioned purpose, and that it has actually complied with the provisions of the Patent Law, they should file an application in accordance with the law.

11: Feeding head 12: Injection runner 13: Air flow path 14: Base 141: Injection port 142: Blow Hole 15: Injection room 151: putter 16: heater 17: Air inlet 18: plugin 181: head end 182: Body 183: Connecting hole 19: annular space 21: Chute assembly 22: Chute 23: bottom plate 231: Through hole 24: side panel 31: Skateboard 32: upper surface 33: lower surface 34: metering tank 41: Influence 43: drive unit 431: Piston Rod 51: discharge mechanism 52: Outlet 53: Screw 61: Hot press forming mold 62: upper die 63: Lower die 631: mold cavity A: Resin pellets

Figure 1 is an exploded diagram of the creation. Figure 2 is a partial cross-sectional schematic diagram after the creation and assembly. Figure 3 is a schematic diagram of the assembly of the creative chute assembly and skateboard. Figures 4 to 7 are schematic diagrams of the usage status of the creation, showing the status of the creation when the plastic metering and feeding device is used in conjunction with the hot pressing mold.

11: Feeding head

14: Base

141: Injection port

142: Blow Hole

151: putter

16: heater

18: plugin

21: Chute assembly

22: Chute

31: Skateboard

34: metering tank

41: Influence

43: drive unit

431: Piston Rod

51: discharge mechanism

52: Outlet

53: Screw

Claims (6)

A plastic metering and feeding device, including: An inlet, an injection channel and an air channel are formed inside, the injection channel is connected to an injection port at the bottom of the inlet, and the air channel is connected to the bottom of the inlet One blow hole of, and the blow hole is ring-shaped; A chute assembly arranged at the bottom of the feeding head, the chute assembly has a chute corresponding to the position of the injection port and the blowing hole; A sliding plate is slidably arranged in the sliding groove. The sliding plate has an upper surface, a lower surface, and a circular metering groove penetrating the upper surface and the lower surface, and the sliding plate can be pushed along the sliding groove Displacement, so that the metering groove can be correspondingly located at one of the injection port or the blowing hole. The plastic metering and feeding device according to claim 1, wherein there is an injection chamber in communication between the injection channel and the injection port, and a push rod is correspondingly penetrated in the injection chamber, by driving The push rod pushes toward the injection port, so that the resin material in the injection chamber can be output from the injection port. The plastic metering and feeding device according to claim 2, wherein at least one heater is installed beside the injection chamber to maintain the temperature of the resin material in the injection chamber. The plastic metering and feeding device according to claim 1, wherein an insert is provided in the blowing hole, the insert has a head end and a body with an outer diameter smaller than the head end, the head end is opened with a communicating hole, the One end of the communicating hole can be connected to the air passage, and the other end of the communicating hole can be connected to the blowing hole, and the outer diameter of the body is smaller than the inner diameter of the blowing hole, so that the blowing hole and the insert An annular space can be formed between. The plastic metering and feeding device according to claim 1, wherein the chute assembly has a bottom plate, and two side plates arranged in parallel and spaced apart are connected to the bottom plate, so that the two side plates can be placed between the two side plates. The sliding groove extending along a predetermined direction is formed, and a through hole penetrates through the position of the bottom plate relative to the blowing hole. The plastic metering and feeding device according to claim 1, wherein the bottom of the feeding head is oppositely provided with a base, the base is provided with the injection port and the blowing hole, and the sliding plate has one end and a pulling member And the pull member is used to connect with a transmission unit, and can be used to drive the pull to perform a back-to-return movement, and when the transmission unit drives the pull member to move, it can synchronously drive the sliding plate along the chute Displacement, so that the metering groove on the sliding plate can be correspondingly positioned at one of the injection port or the blowing hole.

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