TWI622482B - Cutting device - Google Patents

Abstract

The present invention provides a cutting device for processing a molded article obtained by injection molding, which can partially break a product portion and a gate, and the molded article includes a product portion and a flow path portion, a product portion and a flow path portion The cutting device includes a flow path arrangement portion, and a flow path arrangement space for arranging the flow path portion is provided in the flow path arrangement portion, and the gate portion is provided in the flow path arrangement space. In the gate passage, at least one cutter is inserted between the product portion and the flow path arrangement portion, and the flow path arrangement portion and the cutter are connected to the drive system, and the drive system first controls the flow path arrangement portion and the flow path portion to be away from the product portion. Move in the direction, and then control the cutter to partially break the gate and the product. The cutting device is configured to stretch the gate portion away from the product portion before the gate portion and the product portion are separated, so that the nozzle of the cut product is not conspicuous, and no protrusion remains on the surface of the product, so that the product is made. Has a good appearance.

Description

Cutting device

The present invention relates to a cutting device.

Injection molding refers to a method in which a material that has been heated and melted is injected into a mold, cooled and solidified to obtain a molded article, which is also called injection molding, and is suitable for use in a molding process in mass production of a complicated product. . The molded article such as rubber is molded by a mold, and after the raw material is heated, it flows from the flow path to the mold forming portion, and the finished molded product retains the flow path portion formed in the flow path and is formed in the pouring portion in addition to the product portion. The mouth portion of the mouth, therefore, all the steps are finally completed by cutting the product portion from the molded article. However, when the product portion is cut out from the molded article, the nozzle is not cut well, and a nozzle is formed at the cut portion, and protrusions remain on the surface of the product portion, which affects the appearance of the product.

In view of the above-described deficiencies of the prior art, it is an object of the present invention to provide a cutting device which solves the problem that the surface of the product portion remains on the surface of the product portion when the product portion is cut from the molded article in the prior art, thereby affecting the appearance of the product. In order to achieve the above object and other related objects, the present invention provides a cutting device for processing a molded article formed by injection molding, which can partially break a product portion and a gate, and the molded article includes a product portion and a flow. The road portion, the product portion and the flow path portion are connected by a gate portion. The cutting device includes a flow path arrangement portion, and a flow path arrangement space for arranging the flow path portion is provided in the flow path arrangement portion, and a gate passage through which the gate portion passes is provided in the flow path arrangement space. At least one cutter is inserted between the product portion and the flow path arrangement portion. The flow path arrangement portion and the cutter are connected to the drive system, and the drive system first controls the flow path arrangement portion and the flow path portion to move away from the product portion, and then controls the cutter to partially break the gate portion and the product. In the above-described cutting device, before the gate portion and the product portion are separated by the cutter, the flow path arranging portion moves the flow path portion away from the product portion, and the gate portion is stretched, whereby the product portion is cut. The nozzle is not very obvious. Preferably, the cutting device further comprises a swing arm, one end of the swing arm is connected with the cutter, and the swing arm is provided with a rotating shaft located at an intermediate portion of the swing arm, and the driving system can drive the swing arm to rotate around the rotating shaft . Preferably, the number of the cutters is two, and they are respectively disposed on both sides of the gate portion. More preferably, the distance between the two cutters is less than the width of the product portion. According to the width setting described above, when the flow path portion in the flow path arrangement portion is moved away from the product portion, the position of the product portion remains unchanged, so that the purpose of stretching the gate portion can be ensured. Preferably, the flow path arrangement portion is connected to the drive system via the main shaft, and the drive system drives the flow path arrangement portion to move relative to the product portion via the main shaft. More preferably, the cutting device further comprises a swing arm, one end of the swing arm is connected with the cutter, and the swing arm is rotatable about a rotation axis located at an intermediate portion of the swing arm, and a stop block is fixedly mounted on the main shaft, and the swing arm is fixed One end away from the cutter is located between the stopper and the drive system, and the stopper pushes the swing arm away from one end of the cutter, so that the swing arm rotates around the rotation axis. When the drive system moves the flow path arrangement portion away from the product portion via the main shaft, the stopper located on the main shaft also moves backward, pushing the swing arm away from one end of the cutter to swing away from the main shaft. One end of the swing arm with the cutter will swing toward the gate portion, and the gate portion and the product portion are partially broken by the cutter. More preferably, the swing arm includes a connecting rod connected to the cutter and a guiding portion located at one end of the connecting rod away from the cutter, the rotating shaft is disposed on the connecting rod, and the guiding portion is located on a side of the connecting rod near the main shaft, and The guiding portion is located between the stopper and the driving system, and the guiding portion is provided with a guiding surface facing the stopper. When the drive system moves the flow path arranging portion away from the product portion via the main shaft, the stopper on the main shaft also moves backward, and the stopper slides on the guide surface of the guide portion, pushing the guide portion to move toward the guide portion. Swinging away from the direction of the main shaft, at this time, one end of the swing arm with the cutter will swing toward the gate portion, and the gate portion and the product portion are partially broken by the cutter. More preferably, the number of the cutters is two, and is respectively disposed on two sides of the gate portion, and the number of the corresponding swing arms is also two, and are respectively disposed on both sides of the main shaft. More preferably, a distance limiting rod is further disposed between the two swing arms, and the distance limiting rod is disposed at one end of the two swing arms away from the cutter, and one end of the distance limiting rod is fixed to one end of the swing arm, and the distance limiting rod is The other end extends to the side of the other swing arm away from the main shaft and is bent, and the distance between the two ends of the limit rod is the maximum allowable value of the distance between the two swing arms. By limiting the opening angle of the two swing arms and limiting the distance between the cutters at the ends of the swing arm, it is possible to prevent the blade from being damaged due to too much pressure between the two cutters. Preferably, the cutting device further includes a cutter holding portion, and the cutter holding portion is provided with a cutter rail, and the cutter is located in the cutter holding portion and is slidable along the cutter rail. Preferably, the width of the gate channel is smaller than the width of the flow path portion. According to the width setting described above, when the flow path portion in the flow path arrangement portion is moved away from the product portion, the position of the product portion remains unchanged, so that the purpose of stretching the gate portion can be ensured. Preferably, a start switch is provided in the flow path arrangement space, and the start switch is connected to the drive system. When the flow path portion of the molded product is placed in the flow path arrangement space, the flow path portion contacts the start switch, and the start switch receives a pressure from the molded product to transmit a signal to the drive system, and the drive system controls the flow path arrangement portion and the flow path. The part moves away from the product part. The start switch links the positional state of the molded article with the action of the drive system, so there is no need to manually judge whether the molded article is in place or to manually start the drive system. As described above, the cutting device of the present invention has the following advantageous effects: the cutting device stretches the gate portion away from the product portion before breaking the gate portion and the product portion, thereby making the cutting portion The nozzle of the product is not obvious, and there is no protrusion on the surface of the product, so that the product has a good appearance.

In the following, embodiments of the present invention will be described by way of specific examples, and those skilled in the art can readily understand other advantages and functions of the present invention in light of the disclosure herein. Please refer to Figure 1 to Figure 9. It is to be understood that the structure, the proportions, the size and the like shown in the drawings are only used to facilitate the understanding and reading of those skilled in the art, and are not intended to limit the form of the invention. The qualifications are not technically meaningful, and any changes in the structure, changes in the proportional relationship, or adjustments in size shall be in this case without affecting the effects and achievable purposes of the present invention. The scope of the technical content disclosed by the invention is within the scope of the invention. In addition, terms such as "upper", "lower", "left", "right", "intermediate" and "one" as used in this specification are only used to facilitate understanding and not to limit this. The scope of the invention can be implemented, and changes or adjustments to the relative relationship are considered to be within the scope of the invention when the technical content is not substantially changed. As shown in FIG. 1, the molded article 2 after injection molding and demolding includes a product portion 21 and a flow path portion 22, and the product portion 21 and the flow path portion 22 are connected by a gate portion 23. In order to process (cut) the molded article 2, the cutting device 1 is designed as shown in Figs. 2 to 5 of the present invention. The cutting device 1 includes a flow path arrangement portion 11 in which a flow path arrangement space 12 for arranging the flow path portion 22 is provided, and in the flow path arrangement space 12, a gate passage through which the gate portion 23 passes is provided. 13. At least one cutter 14 is inserted between the product portion 21 and the flow path arranging portion 11. The flow path arrangement portion 11 and the cutter 14 are connected to the drive system 15, and the drive system 15 first controls the flow path arrangement portion 11 and the flow path portion 22 to move away from the product portion 21, and then controls the cutter 14 to connect the gate portion 23 with The product portion 21 is broken. In the cutting device 1, before the gate portion 23 and the product portion 21 are separated by the cutter 14, the flow path arranging portion 11 moves the flow path portion 22 away from the product portion 21, and the gate portion 23 is stretched. Thereby, the nozzle after the product portion 21 is cut is not so conspicuous. In order to realize the above-described function, the flow path arrangement portion 11 is connected to the drive system 15 via the spindle 16, and the drive system 15 drives the flow path arrangement portion 11 to move away from the product portion 21 via the spindle 16. The specific connection form between the cutter 14 and the drive system 15 is as follows. The cutting device 1 further includes a swing arm 17, one end of which is connected to the cutter 14, and the swing arm 17 can be located at the middle of the swing arm 17 (the one end of the swing arm 17 connected to the cutter 14 is away from the cutter 14 Between the other ends of the rotating shaft 171 is rotated centrally, the stopper 18 is fixedly embedded in the main shaft 16, and one end of the swing arm 17 away from the cutter 14 is located between the stopper 18 and the driving system 15, and the stopper 18 is in contact with The swing arm 17 is pushed away from one end of the cutter 14, whereby the swing arm 17 is rotated about the rotation shaft 171. When the drive system 15 moves the flow path arranging portion 11 away from the product portion 21 via the main shaft 16, the stopper 18 on the main shaft 16 also moves rearward (away from the product portion 21) and contacts the swing arm 17 Keep away from one end of the cutter 14. Thereby, the swing arm 17 is pushed away from one end of the cutter 14 to swing in a direction away from the main shaft 16. At this time, one end of the swing arm 17 with the cutter 14 is swung toward the gate portion 23, and the gate portion 23 is separated from the product portion 21 by the cutter 14. One of the above-described swing arms 17 is specifically configured as follows. That is, the swing arm 17 includes a connecting rod 172 connected to the cutter 14 and a guiding portion 173 located at one end of the connecting rod 172 away from the cutter 14, and the rotating shaft 171 is disposed on the connecting rod 172 near the cutter 14 The guiding portion 173 is located on the side of the connecting rod 172 near the main shaft 16, and the guiding portion 173 is located between the stopper 18 and the driving system 15, and the guiding portion 173 is provided with a guiding surface 174 facing the stopper 18. When the drive system 15 moves the flow path arranging portion 11 away from the product portion 21 via the main shaft 16, the stopper 18 on the main shaft 16 also moves rearward, and the stopper 18 is on the guide surface 174 of the guide portion 173. slide. At this time, the stopper 18 pushes the guiding portion 173 to swing away from the main shaft 16, and at this time, one end of the swing arm 17 with the cutter 14 is swung toward the gate portion 23, and the gate portion is used by the cutter 14. 23 is separated from the product part 21. Here, the guiding surface 174 of the guiding portion 173 may be a flat surface or a smooth curved surface. For example, the guiding surface 174 of the guiding portion 173 shown in FIG. 9 is a flat surface, and the guiding surface shown in FIG. 2 to FIG. 8a. The guiding surface 174 of the guiding portion 173 is a smooth curved surface. The guiding surface 174 of the guiding portion 173 is preferably a convex smooth curved surface, whereby the stopper 18 is more likely to push the guiding portion 173 at a uniform speed without causing a jamming problem. One embodiment of the guiding portion 173 is as shown in FIG. The guiding portion 173 includes a cylinder 175 and a connecting member 176 connecting the cylinder 175 and the connecting rod 172. The axis of the cylinder 175 is parallel to the blade of the cutter 14, and the cylinder 175 can be designed to be rotatable about the axis or can be designed as Unable to rotate. At this time, the stopper 18 is slid on the outer peripheral surface of the cylinder 175 on the guide surface 174 of the guide portion 173, that is, the outer peripheral surface of the cylinder 175, whereby the guide portion 173 is swung in a direction away from the main shaft 16. Generally, the number of the cutters 14 is preferably two, and is respectively disposed on two sides of the gate portion 23, and the number of the corresponding swing arms 17 is also two, and are respectively disposed on both sides of the main shaft 16. When the two swing arms 17 are disposed, a distance restricting rod 110 may be disposed between the two swing arms 17, and the distance restricting rod 110 is disposed at one end of the two swing arms 17 away from the cutter 14 (the end of the drive system 15 side) And one end of the distance limiting rod 110 is fixed to a swing arm 17, and the other end of the distance limiting rod 110 extends to the side of the other swing arm 17 away from the main shaft 16 and is bent, and the distance between the two ends of the restriction rod 110 is The maximum allowable value of the distance between the two swing arms 17. By limiting the opening angle of the two swing arms 17, and limiting the distance between the cutters 14 at the ends of the swing arms 17, it is possible to prevent the blade portions from being damaged due to too much pressure between the two cutters 14 . One embodiment of the distance limiting rod 110 is shown in FIG. One end of the distance limiting rod 110 is an engaging end 111, and the engaging end 111 is fixed to the swing arm 17 by a locking bolt 113, and an adjusting bolt 112 is provided at one end of the bending of the distance limiting rod 110, and the head of the adjusting bolt 112 is provided. The portion faces the side of the swing arm 17 (the outer side opposite to the side opposite to the side of the main shaft 16). By rotating the adjusting bolt 112, the distance between the head of the adjusting bolt 112 and the side of the swing arm 17 can be adjusted, whereby the maximum angle at which the two swing arms 17 can be opened can be adjusted. The cutting device 1 further includes a cutter holding portion 19 in which a cutter slide rail is provided, and the cutter 14 is located inside the cutter holding portion 19 and is slidable along the cutter slide rail. In order to move the flow path portion 22 in the flow path arranging portion 11 away from the product portion 21, it is ensured that the position of the product portion 21 is kept constant so that the gate portion 23 is pulled away from the product portion 21. For the purpose of stretching, the above object is achieved by controlling the distance between the blades of the two cutters 14 and the width of the gate passages 13. At this time, the distance between the blades of the two cutters 14 is made smaller than that of the product portion. The width of 21 is such that the width of the gate passage 13 is smaller than the width of the flow path portion 22. The width of the product portion 21, the width of the gate passage 13, and the width of the flow path portion 22 mean the maximum width in a direction parallel to the distance between the blade portions of the two cutters 14. As shown in FIG. 3, a start switch 120 is provided in the flow path arrangement space 12, and the start switch 120 is connected to the drive system 15. When the flow path portion 22 of the molded product 2 is placed in the flow path arrangement space 12, the flow path portion 22 contacts the start switch 120, and the start switch 120 receives the pressure of the molded product 2 to transmit a signal to the drive system 15, and the drive system The control flow path arrangement portion 11 and the flow path portion 22 move in a direction away from the product portion 21. By the setting of the start switch 120, once the molded article 2 is placed in position, the drive system 15 starts to operate. The start switch 120 associates the positional state of the molded article 2 with the action of the drive system 15, so that it is not necessary to artificially judge whether or not the molded article 2 is in place. Moreover, there is no need to manually activate the drive system 15. As shown in Fig. 1, the axis of the flow path portion 22 of the molded article 2 is substantially straight and has two end portions, and the plurality of product portions 21 are aligned in the axial direction of the flow path portion 22 and are located at the periphery of the flow path portion 22. On the surface. At this time, the space body corresponding to the flow path arrangement space 12 is of a straight type and vertically arranged, and the start switch 120 is located at the lower end of the flow path arrangement space 12, that is, one of the flow path arrangement spaces 12 closest to the ground. The flow path portion 22 is vertically inserted into the flow path arrangement space 12 from the upper end of the flow path arrangement space 12 and squeezes the start switch 120, and then the start switch 120 transmits a signal to the drive system 15. As shown in FIGS. 6 to 8b, the specific steps of the cutting device 1 for cutting the molded article 2 are as follows. 1) The molded article 2 is placed in the cutting device 1. At this time, the flow path portion 22 is located in the flow path arrangement space 12 of the flow path arrangement portion 11, the gate portion 23 is inserted into the gate channel 13, and the product portion 21 is located. Externally, the cutter 14 is inserted between the product portion 21 and the flow path arrangement portion 11 (see Fig. 6). 2) The flow path unit 22 is in contact with the start switch 120, and the start switch 120 transmits a signal to the drive system 15, and the drive system 15 moves the flow path arrangement portion 11 and the flow path portion 22 together in the direction away from the product portion 21 via the spindle 16. At this time, since the product portion 21 is blocked by the cutter 14, the flow path arrangement portion 11 and the flow path portion 22 cannot move together and remain stationary. Thereby, the gate portion 23 is stretched between the product portion 21 and the flow path portion 22 (see FIGS. 7a to 7b). 3) When the main shaft 16 is moved away from the product portion 21 to a certain position, the stopper 18 on the main shaft 16 is in contact with the guiding portion 173, and the stopper 18 slides on the guiding surface 174 of the guiding portion 173 to push The guiding portion 173 swings in a direction away from the main shaft 16. At this time, one end of the swing arm 17 with the cutter 14 is swung toward the gate portion 23. Finally, the cutter 14 separates the gate portion 23 from the product portion 21. The cut product portion 21 is the final product (refer to Figs. 8a to 8b). According to the above method, since the gate portion 23 is stretched in the direction away from the product portion 21 before the gate portion 23 and the product portion 21 are separated, the nozzle of the final product after the cutting is not noticeable. The cutting device is applied to the molded article 2 shown in Fig. 1. The molded article 2 has a linear flow path portion 22, and the product portion 21 is aligned in the axial direction of the flow path portion 22 and is located at the periphery of the flow path portion 22. On the surface. At this time, the space body of the flow path arrangement space 12 is a straight type that matches the flow path portion 22, and the gate channel 13 extends in a direction parallel to the axial direction of the flow path arrangement space 12. The blade portion of the cutter 14 is a straight line parallel to the axis of the flow path arrangement space 12. Further, the cutting device can be applied to molded articles of other shapes, for example, a molded article in which the flow path portion is a curved shape, or a molded article in which the product portion is located on the circumferential surface of the flow path portion and diffused in different directions. In the molded article of another shape, if the flow path portion 22 is located in the flow path arrangement space 12, the gate portion 23 can protrude from the gate passage 13 and the cutter 14 can be positioned on both sides of the gate portion 23, that is, The cutting function of the molded article can be realized. Therefore, it is only necessary to change the shape of the flow path arrangement space 12 according to the shape of the flow path portion 22, and the shape of the gate channel 13 and the shape of the blade portion of the cutter 14 can be changed according to the position of the gate portion 23, thereby realizing other Cutting of the shaped article. As described above, in the cutting device of the present invention, the gate portion is stretched away from the product portion before the gate portion and the product portion are separated, whereby the nozzle of the final product after cutting is not noticeable. No protrusions on the surface leave the product with a good appearance. Therefore, the present invention effectively overcomes various defects in the prior art and has high industrial utilization value. The above-described embodiments are merely illustrative of the principles of the invention and its effects, and are not intended to limit the invention. Modifications or variations of the above-described embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, all equivalent modifications or changes may be made to the present invention without departing from the spirit and scope of the invention.

1‧‧‧cutting device

2‧‧‧Formed products

11‧‧‧Flow Path Configuration Department

12‧‧‧Flow path configuration space

13‧‧‧Gateway

14‧‧‧Cutting knife

15‧‧‧Drive system

16‧‧‧ Spindle

17‧‧‧ swing arm

18‧‧‧block

19‧‧‧Cutter Maintenance Department

21‧‧‧Products Department

22‧‧‧Flow Department

23‧‧‧Gate Department

110‧‧‧Distance bar

111‧‧‧Card end

112‧‧‧Adjustment bolts

113‧‧‧Lock bolts

120‧‧‧Start switch

171‧‧‧Rotary axis

172‧‧‧ Connecting rod

173‧‧‧Guide

174‧‧‧ Guide surface

175‧‧‧Cylinder

176‧‧‧Connecting members

Fig. 1 is a schematic view showing the structure of a molded article to be cut by the cutting device of the present invention. 2 to 5 are schematic views showing the construction of the cutting device of the present invention. Fig. 6 to Fig. 8b are views showing a cutting step of a molded article of the cutting device of the present invention. Fig. 9 is a view showing a state in which the guiding surface of the guiding portion is flat in the cutting device of the present invention.

Claims (12)

A cutting device (1) for processing a molded article (2) formed by injection molding, which can separate a product portion (21) from a gate portion (23), and the molded article (2) comprising the product portion (21) and the flow path portion (22), wherein the product portion (21) and the flow path portion (22) are connected by the gate portion (23), and the cutting device ( 1) The cutting device (1) includes a flow path arrangement portion (11), and the flow path arrangement portion (11) is provided with a flow path arrangement space (12) for arranging the flow path portion (22). The flow path arrangement space (12) is provided with a gate passage (13) through which the gate portion (23) passes, and at least one cutter is inserted between the product portion (21) and the flow path arrangement portion (11). (14) The flow path arrangement portion (11) and the cutter (14) are connected to the drive system (15), and the drive system (15) first controls the flow path arrangement portion (11) and the flow path portion (22). Moving away from the product portion (21), the cutter (14) is further controlled to separate the gate portion (23) from the product portion (21). The cutting device (1) of claim 1, wherein the cutting device (1) further comprises a swing arm (17), and one end of the swing arm (17) is connected to the cutter (14), and the swing arm is (17) A rotation shaft (171) located at an intermediate portion of the swing arm (17) is provided, and the drive system (15) is capable of driving the swing arm (17) to rotate about the rotation shaft (171). The cutting device (1) of claim 1 or 2, wherein the number of the cutters (14) is two, and is respectively disposed on both sides of the gate portion (23). The cutting device (1) of claim 3, wherein the distance between the two cutters (14) is smaller than the width of the product portion (21). The cutting device (1) of claim 1, wherein the flow path arrangement portion (11) is connected to the drive system via a spindle (16), and the drive system (15) causes the flow through the spindle (16) The road arrangement portion (11) moves relative to the product portion (21). The cutting device (1) of claim 5, wherein the cutting device (1) further comprises a swing arm (17), and one end of the swing arm (17) is connected to the cutter (14), and the swing arm ( 17) It is rotatable about a rotating shaft (171) located at an intermediate portion of the swing arm (17), and a stopper (18) is fixedly fitted to the main shaft (16), and the swing arm (17) is away from the cutter ( 14) One end is located between the above-mentioned stopper (18) and the driving system (15), and the stopper (18) pushes the swing arm (17) away from one end of the cutter (14) to make the swing arm (17) The rotation is centered on the above-mentioned rotation axis (171). The cutting device (1) of claim 6, wherein the swing arm (17) includes a connecting rod (172) connected to the cutter (14) and a distal cutter (14) located at the connecting rod (172). a guiding portion (173) at one end, wherein the rotating shaft (171) is disposed on the connecting rod (172), and the guiding portion (173) is located on a side of the connecting rod (172) near the main shaft (16), The guiding portion (173) is located between the stopper (18) and the driving system (15), and the guiding portion (173) is provided with a guiding surface (174) facing the stopper (18). The cutting device (1) of claim 6 or 7, wherein the number of the cutters (14) is two, respectively disposed on two sides of the gate portion (23), corresponding to the swing arm (17) The number is two and is respectively disposed on both sides of the above-mentioned main shaft (16). The cutting device (1) of claim 8, wherein a distance limiting rod (110) is further disposed between the two swing arms (17), and the distance limiting rod (110) is disposed on the two swing arms (17). One end away from the cutter (14), one end of the distance limiting rod (110) is fixed to one end of a swing arm (17), and the other end of the distance restricting rod (110) extends to the other swing arm (17) It is away from the side of the main shaft (16) and is bent. The distance between the two ends of the distance limiting rod (110) is the maximum allowable value of the distance between the two swing arms (17). The cutting device (1) according to claim 1, wherein the cutting device (1) further includes a cutter holding portion (19), and the cutter holding portion (19) is provided with a cutter slide rail, and the cutter cutter (14) is located in the cutter holding portion (19) and is slidable along the cutter rail. The cutting device (1) of claim 1, wherein the width of the gate passage (13) is smaller than the width of the flow path portion (22). A cutting device (1) according to claim 1, wherein a start switch (120) is provided in the flow path arrangement space (12), and the start switch (120) is connected to the drive system.