CN2647550Y - Rotary Shaft Two-Color Molding Machine - Google Patents

Abstract

A rotary shaft type double-color forming machine mainly utilizes a rotary central rotary shaft to drive a male die to switch between two forming positions, so that a die core on the male die can correspond to two die cavities on a female die at different times due to the switching of the male die position, and a double-color formed product can be formed. In order to achieve the purpose, the utility model is characterized in that the male die is erected on a rotating shaft unit, the rotating shaft unit can be driven to rotate by a rotating control mechanism and can also be controlled to transversely shift by a transverse moving control mechanism, and the rotating shaft unit can not mutually interfere when the actions such as transverse moving, rotating and the like are carried out.

Description

Rotary Shaft Two-Color Molding Machine

(1) Technical field

The utility model relates to a two-color molding machine capable of molding two-color injection products, in particular to a male mold erected on a central rotating shaft capable of lateral displacement and rotation. A rotary shaft type two-color molding machine that switches between two molding positions to form two-color molded products.

(2) Background technology

In the past, the design of the injection molding machine roughly included: a fixed seat, a movable seat spaced left and right, and a forming mold, wherein the forming mold included: a master mold installed on the fixed seat, and a mold installed on the movable seat. male model. When the forming mold is at the first injection position, the male mold and the female mold respectively erected on the fixed seat and the movable seat will meet so that the injection material injected by the injection device can be filled in the mold cavity to form the injection product. When the mold is in a non-injection position, the male mold will be separated from the female mold to facilitate the removal of the injection product from the mold cavity.

This kind of injection molding machine in the past can only form single-color injection products. In order to make the injection products more variable in color, there is a "turntable two-color molding machine" in the prior art, which mainly uses a turntable to set up at the same time. The forming molds of the two groups are driven by the rotation of the turntable to switch the forming positions of the forming molds, so that the mold cavities of the forming molds correspond to the injection devices filled with different injection materials. In terms of the design of the previous "turntable two-color molding machine", two sets of molding molds must be erected on the turntable at the same time, so the manufacturing cost is relatively high. This kind of "turntable two-color molding machine" is also more suitable for molding large volume It is not suitable for molding small-volume injection products such as keyboard keys.

(3) Contents of utility model

The purpose of the utility model is to provide a rotary shaft type two-color molding machine with innovative structure, low manufacturing cost, and suitable for molding small-volume two-color injection products.

The rotary shaft type two-color molding machine of the utility model includes: an injection unit and a molding die, and the injection unit includes: a fixed seat spaced apart from the left and right, a movable seat, two injection devices arranged in front and rear intervals, and a Up and towards the positioning die holder of the fixed seat.

And this forming mold comprises: a female mold combined on the fixed seat and facing the movable seat, and a male mold that can be positioned on the positioning mold base or leaning against the female mold, wherein the female mold is formed with two front and rear spacing settings and forming The perforation on the fixing seat communicates with the mold cavity opposite to the injection device, and two mold cores opposite to the mold cavity are formed on the male mold.

The utility model is characterized in that: the two-color molding machine also includes: an assembly seat erected on the movable seat, a rotating shaft unit erected on the movable seat, and a shaft unit connected to the movable seat to control the male die in two forming A rotation control mechanism for switching between positions, and a lateral movement control mechanism mounted on the assembly seat to drive the male die to switch between a positioning state and a non-positioning state. The rotating shaft unit includes: a shaft tube mounted on a movable seat and capable of rotating along its own axis, a central shaft that is interlocked with the inner and outer sides of the shaft tube and capable of lateral displacement, and a shaft connected between the male mold and the central shaft. Male mold mounting shaft.

When the traversing control mechanism drives the male mold to switch from a positioning state to a non-positioning state, the rotation control mechanism can drive the male mold to switch between two molding positions, so that the mold cores on the male mold can correspond to each other at different times. Two mold cavities on the master mold.

(4) Description of drawings

The following is a detailed description of the rotary shaft type two-color molding machine of the present invention through the best embodiment and the accompanying drawings. In the accompanying drawings:

Fig. 1 is a schematic top view of a preferred embodiment of the two-color molding machine of the present invention, in which a male die of the two-color molding machine is in an unpositioned state.

Fig. 2 is a left side view of the preferred embodiment.

Fig. 3 is a sectional view taken along line 3-3 in Fig. 2 .

Fig. 4 is an incomplete perspective exploded view of the preferred embodiment, showing the corresponding relationship between an assembly seat and a traverse control mechanism of the two-color molding machine.

Fig. 5 is an incomplete perspective exploded view of the preferred embodiment, showing the relative relationship between a rotating shaft unit and the traverse control mechanism of the two-color molding machine.

Fig. 6 is a schematic top view similar to Fig. 1, in which the male mold of the two-color molding machine is in a positioning state.

Fig. 7 is a sectional view similar to Fig. 3, in which a piston rod of a traverse cylinder of the traverse control mechanism is in a retracted position.

Fig. 8 is a top view similar to Fig. 1, in which a molding die of the two-color molding machine is located at an injection position.

Fig. 9 is a sectional view similar to Fig. 3, in which a piston rod of a rotary cylinder of the two-color molding machine is in a protruding position.

Fig. 10 is a schematic cross-sectional view taken along line 10-10 in Fig. 9 .

(5) specific implementation

Referring to Figures 1, 2, and 3, the preferred embodiment of the two-color molding machine of the present invention is suitable for forming small and two-color injection products such as keyboard buttons. The above-mentioned two-color molding machine includes: Injection unit 1, a forming mold 2, an assembly seat 3, a rotating shaft unit 4, a rotation control mechanism 5, a lateral movement control mechanism 6, and a material return mechanism 7 on the machine platform.

The injection unit 1 includes: an upright fixed seat 11 , a movable seat 12 that can be moved toward or away from the fixed seat 11 , and a first injection device 13 and a second injection device 14 spaced from each other. Wherein the fixed seat 11 has a first side 111, a second side 112 spaced left and right, and two first perforations 113 spaced front and back and passing through the two sides 111, 112, the first side 111 faces the movable seat 12, The second side 112 faces the injection device 13 , 14 , and the two first through holes 113 correspond to an injection head 131 , 141 of the injection device 13 , 14 respectively. The movable seat 12 has a first side 121 facing the first side 111, a second side 122 spaced left and right from the first side 121, and a first central hole 123 and two second holes running through the side 121, 122. The through hole 124 , the second through hole 124 is laterally corresponding to the first through hole 113 and equidistant from the first central hole 123 . The injection unit 1 of the present utility model also includes: a positioning mold base 15 erected on the first side 121 of the movable base 12, and the positioning mold base 15 is provided with two concave positioning grooves 151 on the side facing the fixed base 11 .

The forming mold 2 can be switched between an injection position and a non-injection position, including: a female mold 21 fixedly installed on the first side 111 of the fixed seat 11, and a controllable mold 21 which can be moved toward or away from the female mold. 21 of the male mold 22, wherein the female mold 21 has a small mold cavity 211 and a large mold cavity 212 communicated with the first through hole 113 and arranged in front and back. And this male mold 22 has the mold side 221,222 of two left and right intervals, two mold kernels 223,224 that protrude toward female mold 21 direction from this mold side 221, and two from mold side 222 to the positioning that protrudes toward positioning mold base 15 Tenon 225. When the forming mold 2 is in a first molding position, the mold core 223 of the male mold 22 corresponds to the small mold cavity 211 of the female mold 21, and the other mold core 224 corresponds to the large mold cavity 212 of the female mold 21, and when forming When the mold 2 is transferred from the first molding position to a second molding position, the mold core 223 of the male mold 22 corresponds to the large mold cavity 212 of the female mold 21, and the other mold core 224 corresponds to the small mold cavity 211 of the female mold 21 .

Referring to Figures 3 and 4, the assembly seat 3 of the present utility model is fixedly installed on the second side 122 of the movable seat 12 by four screw rods 30, and the above-mentioned assembly seat 3 includes: a base wall 31 spaced left and right from the second side 122 , two first protruding pillars 32 spaced up and down from the base wall 31 protruding to the right against the second side 122 , two spaced up and down and protruding from the base wall 31 to the right against the second side 122 on the second side 122 Two protrusions 33 , a straight groove 34 between two groups of protrusions 32 , 33 , and a transverse groove 35 arranged between the upper and lower protrusions 32 , 33 and intersecting with the straight groove 34 . Wherein the base wall 31 and the transverse groove 35 are at the same height to set a second central hole 311 in the center, and a third through hole 312 respectively located on the left and right sides of the second central hole 311, the second central hole 311 And corresponding to this straight missing groove 34. On the right side of the second protruding post 33 close to the second side 122 , a row of tooth slots 331 facing the straight slots 34 are respectively disposed. In order to improve the positioning effect between the assembly seat 3 and the movable seat 12 , a protrusion that can be embedded on the second side surface 122 of the movable seat 12 respectively protrudes from a right end surface of the studs 32 , 33 .

5, the rotating shaft unit 4 can control the male mold 22 to switch between the first and second molding positions, including: a shaft tube 41 rotatably mounted on the first central hole 123 of the movable seat 12, a linkage A central rotating shaft 42 that is sheathed on the shaft tube 41, and a male mold installation shaft 43 that is combined and interlocked with the central rotating shaft 42. Wherein the shaft tube 41 has a cylinder wall 411 arranged around a central axis of rotation, and a shaft channel 413 defined by an inner surrounding surface 412 of the cylinder wall 411. The above-mentioned inner surrounding surface 412 includes: a lengthwise The circular part 414 that runs through the direction, and a plurality of limiting parts 415 that expand from the circular part 414 to the radially outer end along the length direction, and the cylinder wall 411 also has an outer surrounding surface 416, the above-mentioned outer surrounding The surface 416 has several locking teeth 417 arranged in a ring at positions corresponding to the tooth gaps 331 of the assembly base 3 .

The central rotating shaft 42 is a solid rod body whose cross-section matches the inner surrounding surface 412 of the shaft tube 41. It has an interlocking sleeve part 421 sleeved in the shaft channel 413, and a joint part 422 with a reduced rod diameter. Among them, an outer surface of the interlocking sleeve part 421 protrudes radially along the length direction, and several limiting protrusions 423 can extend into each limiting part 415 of the shaft tube 41, and a sleeve recessed from the center of the right side. Combining hole 424.

The rotation control mechanism 5 is erected on the movable seat 12, and can drive the shaft unit 4 to rotate reciprocally between a set angle. The above-mentioned rotation control mechanism 5 includes: a rotary cylinder 51 with a piston rod 511, and A row of teeth 52 fixedly coupled to the bottom end of the piston rod 511 . When the piston rod 511 is in a retracted position, the bottom edge of the row of teeth 52 does not extend into the notch 331 of the row of teeth of the assembly seat 3 . When the piston rod 511 is at a protruding position, the row of teeth 52 will be driven to extend into the notch 331 of the row of teeth, and at the same time mesh with the locking teeth 417 of the shaft tube 41, and then drive the shaft tube 41 to rotate a predetermined stroke. When the shaft tube 41 is driven to rotate in a first direction, since the shaft tube 41 and the central rotating shaft 42 are interlockingly fitted, and the male mold 22 and the central rotating shaft 42 are interlocked by means of the male mold installation shaft 43, therefore This action can drive the male mold 22 to switch between the first and second molding positions. In this embodiment, the set stroke means that the shaft tube 41 rotates 180 degrees.

The lateral movement control mechanism 6 is installed on the assembly base 3 , and its function is to drive the rotating shaft unit 4 to move laterally without hindering the rotation of the rotating shaft unit 4 . The above-mentioned traversing control mechanism 6 includes: a traversing cylinder 61 mounted on the base wall 31 of the assembly seat 3 and having a piston rod 611, a traversing connecting plate 63 fixedly mounted on the piston rod 611, a The rotating connecting plate 64 spaced from the left and right of the traversing connecting plate 63, several screw rods 65 solidly combining the two connecting plates 63, 64, and two thrust bearings 66 installed on the rotating connecting plate 64, and the The connecting portion 422 of the central rotating shaft 42 is rotatably mounted on the rotating connecting plate 64 . The combined connecting plates 63 , 64 are limitedly moved laterally along the straight groove 34 of the assembly seat 3 .

Referring to Figures 1 and 2, the stripping mechanism 7 is installed on the assembly seat 3, and is located on the front and rear sides of the traversing control mechanism 6, including: a stripping unit 71, and a pedicle cleaning unit 72, the Both the embryo ejection unit 71 and the pedicle removal unit 72 are in the form of hydraulic cylinders, which push out the blanks attached to the mold cores 223, 224 by the protrusion of a piston rod, or push out the blanks attached to the mold cores 223, 224. The pedicle on the top passes through, but this material ejection mechanism 7 is the technology in the past on the injection molding machine, no longer illustrates.

Referring to Figures 6 and 7, when the two-color molding machine of the present invention is in operation, firstly, the connecting plates 63 and 64 are pulled to the left side of Figure 7 by using the traverse cylinder 61, since the central shaft 42 is rotatably combined with On the rotating connecting plate 64, the central rotating shaft 42 and the combined male mold installation shaft 43 and the male mold 22 can be shifted to the left together. The positioning tenon 225 of the mold 22 and the positioning groove 151 of the positioning mold base 15 are engaged, the male mold 22 can be firmly erected on the right side of the positioning mold base 15, and the positioning action is completed. At this time, the male mold 22 in the first forming position.

Referring to FIG. 8 , when the male die 22 is in contact with the positioning die base 15 , the entire movable seat 12 will be driven to close to the fixed seat 11 , so that the male die 22 leans against the female die 21 . In this state, the injection materials of the two injection devices 13, 14 will be respectively injected into the two mold cavities 211, 212 of the master mold 21. After the injection is completed, the movable seat 12 will be driven to move to the left, That is to switch from Figure 8 to Figure 6, and then switch from Figure 6 to Figure 1.

Referring to Figures 1, 9, and 10, when the male mold 22 and the positioning mold base 15 are out of position, the piston rod 511 of the rotary press cylinder 51 will be driven to protrude downward, and thus drive the row of teeth 52 to move downward. When the row of teeth When the 52 moves down and engages with the shaft tube 41, it can drive the fitted central shaft 42, the male mold installation shaft 43 and the male mold 22 to rotate 180 degrees together, so that the male mold 22 is converted from the first forming position to the second forming position In the second molding position, the small core 223 of the male mold 22 will correspond to the large mold cavity 212 of the female mold 21 . After the male mold 22 is transformed into a molding position, the piston rod 611 of the traverse press cylinder 61 will once again pull the male mold 22 to the positioning mold base 15 (as shown in Figure 6), and then the movable seat 12 will lean against the fixed seat 11 again ( As shown in Figure 8) for the second injection action, a two-color injection product can be produced.

After the injection is completed, the movable seat 12 will move to the left again to separate the male and female molds 22, 21, and the male mold 22 will also be separated from the positioning mold base 15, that is, return to the state in Figure 1. After separation, the rotary press The piston rod 511 of the cylinder 51 is driven to move upward, and causes the shaft tube 41 to reverse to a second direction opposite to the first direction, so that the male mold 22 is reset to the first forming position. In this state, since the mold core 224 has formed one type of shot when it corresponds to the small cavity 211, when the male mold 22 returns to the second molding position, the mold core 224 with the first type of shot will switch to the corresponding large cavity. The mold cavity 212 can continuously carry out the injection processing of the second color. In addition, during the conversion process of the male mold 22 between the two molding positions, the injection product and the pedicle will be passed out by the ejection unit 71 and the pedicle removal unit 72, but since the ejection and removal of the pedicle are the previous designs, the following No further explanation.

As can be seen from the above description, the utility model can drive the male mold 22 to switch between two molding positions through the cooperation of the rotating shaft unit 4, the rotation control mechanism 5 and the lateral movement control mechanism 6, which is not seen in the previous injection molding. machine, this design also has the advantages of low manufacturing cost and suitable for molding small volume injection products.

Claims (8)

1. shaft double-color forming machine, comprise: an injection unit and a molding tool, this injection unit comprises: the material injection device that is provided with at interval every the holder, a sliding seat, two front and back that are provided with between left and right, and one be installed on the sliding seat and towards the positioning mould holder of holder; And this mould comprises: one is combined on the holder and towards the master mold of sliding seat, and one can be positioned positioning mould holder or rely on the male model of master mold, perforation connection and the die cavity relative on wherein this master mold is formed with the interval setting of two front and back and is formed at holder with material injection device, and be formed with two dies relative on this male model with described die cavity; Be characterised in that:

This dual-color forming machine also comprises: an assembling seat, that is erected on the sliding seat is erected at the rotation controling mechanism that the rotating shaft unit, on the sliding seat is connected with described sliding seat and changes between two shaping positions with the control male model, and one is erected at the assembling seat upward to drive the traversing controlling organization of male model in a location state and a non-positioning states conversion; Wherein this rotating shaft unit comprises: but one be erected on the sliding seat and can along the central siphon of self axis rotation, one and central siphon inside and outside the central rotating shaft of fit interlock and lateral displacement, an and male model installation shaft that is attached between male model and central rotating shaft.

2. shaft double-color forming machine as claimed in claim 1, it is characterized in that: this traversing controlling organization comprises: level be installed in assembling seat go up and have a traversing cylinder pressure of a piston rod, between left and right every a traversing connecting plate, rotate connecting plate, and regularly with several screw rods of two connecting plate combinations, wherein this traversing connecting plate is connected with piston rod, and the central rotating shaft of this rotating shaft unit is to be rotatably installed in to rotate on the connecting plate.

3. shaft double-color forming machine as claimed in claim 2 is characterized in that: this traversing controlling organization also comprises: compartment of terrain, two left and right sides is installed in the thrust bearing that rotates on the connecting plate, and this central rotating shaft is located in the described thrust bearing.

4. shaft double-color forming machine as claimed in claim 1 is characterized in that: this central siphon has one around the barrel of a central axis, and one by this barrel one in define the axle track that forms around face, central rotating shaft is linked in the described axle track.

5. shaft double-color forming machine as claimed in claim 4, it is characterized in that: the interior of this central siphon has a rounded portions that is provided with along its length on face, and several along its length and the limiting section that radially extends out, and having an interlock cover portion that is set in the axle track on this central rotating shaft, this interlock cover portion is provided with the spacing raised line in several each limiting sections that is provided with and radially charges into central siphon along its length.

6. shaft double-color forming machine as claimed in claim 4, it is characterized in that: also be formed with an outer face that centers on this barrel, position around the corresponding rotation controling mechanism of face outside this is laid with a plurality of latches, and this rotation controling mechanism comprises that one has the revolution cylinder pressure of a piston rod, and a toothrow of fixedlying connected with the piston rod of this revolution cylinder pressure, described toothrow engages with latch on the central siphon.

7. shaft double-color forming machine as claimed in claim 6, it is characterized in that: this assembling seat comprises: a upright basal wall, two give prominence to first protruded stigma that reclines from this basal wall at interval in the upper and lower toward sliding seat, two give prominence to second protruded stigma that reclines from this basal wall at interval in the upper and lower toward sliding seat, one at the straight short slot between first and second protruded stigma in twos, one between up and down between first and second protruded stigma and and the horizontal short slot that occurs simultaneously of straight short slot, and several screw rods that pass this protruded stigma, the assembling seat is combined on the sliding seat by screw rod, be formed with the toothrow short slot towards straight short slot on this second protruded stigma, toothrow stretches into described toothrow short slot.。

8. shaft double-color forming machine as claimed in claim 6 is characterized in that: traversing connecting plate and rotation connecting plate are installed on this straight short slot.

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