Spraying device

Abstract

According to one aspect of the present disclosure, an injection device comprises: a screw capable of moving in a predetermined direction; a front plate; a rear plate receiving a reaction force in the predetermined direction as a result of a pushing plate pushing into the screw; a base supporting the front plate and the rear plate from below; and an auxiliary member extending in the predetermined direction, wherein only one plate is fixed to the base so as to be immovable at least in the predetermined direction, and wherein only one plate is fixed to the auxiliary member so as to be immovable at least in the predetermined direction.

Description

Technical field

[0001] The present disclosure relates to an injection device (injection device). State of the art

[0002] JP 2020-157682 A discloses a mounting bracket (fastening element) for an injection device. The mounting bracket is attached to a front support element and a rear support element. If the injection device is equipped with a cover element, the cover element of the injection device can be attached to the mounting bracket. In this case, the cover element covers all parts of the mounting bracket, the metering motor, the injection motor, the front support element, and the rear support element. Summary of the invention

[0003] The aim is to improve the accuracy of injection molding using an injection device.

[0004] One aspect of the present disclosure is characterized by an injection device that injects a molding material, which is fed into the interior of a cylinder, into a mold, the injection device comprising: a screw inserted into the cylinder and configured to be movable in a predetermined direction; a front plate to which the cylinder is attached; a pusher plate configured to push the screw in the predetermined direction towards an apex of the interior of the cylinder into which the molding material has been fed; a rear plate configured to receive a reaction force in the predetermined direction by the pusher plate pushing the screw; a base supporting the front plate and the rear plate from below;and a fastening element extending in the specified direction and arranged at least between the front plate and the rear plate, wherein the specified direction is a direction of an axis of the worm, only one plate of the front plate and the rear plate is attached to the base so that it is not movable in at least the specified direction relative to the base, and only one plate of the front plate and the rear plate is attached to the fastening element so that it is not movable in at least the specified direction relative to the fastening element. Brief description of the drawings [ Fig. 1] Fig. Figure 1 is a schematic view of an injection device according to one embodiment; [ Fig. 2] Fig. Figure 2 is a schematic view of an injection device according to a first modification; [ Fig. 3] Fig. Figure 3 is a schematic view of an injection device according to a second modification; [ Fig. 4] Fig. Figure 4 is a schematic view of an injection device according to a third modification; [ Fig. 5] Fig. Figure 5 is a schematic view of an injection device according to a fourth modification; [ Fig. 6] Fig. Figure 6 is a schematic view of an injection device according to a fifth modification; and [ Fig. 7] Fig. Figure 7 is a schematic view of an injection device according to a sixth modification. Detailed description of the invention

[0005] In an injection device, for example, a front plate may be attached to a base, and a rear plate may be placed on the base without being attached to it. In this configuration, when a fastener is attached to both the front and rear plates, the following problems arise.

[0006] During an injection cycle, the injection device causes a reaction force (counterforce) to act on the rear plate. This reaction force causes the rear plate, which is not attached to the base, to move relative to the base. However, the rear plate is fixed to the mounting element and therefore cannot move relative to the mounting element. As a result, the rear plate tilts relative to the front plate, and consequently, the front and rear plates can no longer be kept parallel to each other. This can reduce the accuracy of the injection molding process.

[0007] Fig. Figure 1 shows a schematic representation of an injection device 10 according to one embodiment. The injection device 10 and a mold closing device (not shown) are used in an injection molding machine. The injection device 10 injects a molding material into a mold. The mold closing device opens and closes the mold.

[0008] The injection device 10 comprises a cylinder 12, a screw 14, a base 16, a front plate 18, a rear plate 20 and a plurality of tie rods 22. The injection device 10 further comprises a push plate 24, an injection ball screw drive 26, a nut 28 and a fastening element 30.

[0009] The molding material is fed into the interior of cylinder 12. Cylinder 12 has a nozzle opening 12a located at the apex of its interior. The screw 14 is inserted into cylinder 12. The screw 14 is movable within cylinder 12 in a predetermined direction DA. The predetermined direction DA is the direction of the axis AX of the screw 14. When the screw 14 moves within cylinder 12 along the predetermined direction DA towards the nozzle opening 12a, the molding material is injected from the nozzle opening 12a.

[0010] The injection device 10 is mounted with the base 16 below. The front plate 18 and the rear plate 20 are both positioned on the base 16. The base 16 supports the front plate 18 and the rear plate 20 from below. The downward direction is the direction in which gravity acts along the up-down direction DB. The front plate 18 and the rear plate 20 are connected to each other by a plurality of tie rods 22. The cylinder 12 is attached to the front plate 18.

[0011] The push plate 24 is arranged between the front plate 18 and the rear plate 20. The push plate 24 is guided by the plurality of pull rods 22 to move in the predetermined direction DA. The push plate 24 rotatably supports the screw 14. A nut 28 is attached to the push plate 24, and the nut engages helically in the injection ball screw drive 26. The rear plate 20 rotatably supports the injection ball screw drive 26.

[0012] When the injection ball screw drive 26 is driven by a motor (not shown), the push plate 24 moves together with the nut 28 in the predetermined direction DA. As a result, the push plate 24 pushes the screw 14 in the predetermined direction DA towards the nozzle opening 12a. As described above, the molding material is injected from the nozzle opening 12a.

[0013] Furthermore, the push plate 24 presses the screw 14, causing the rear plate 20 to absorb a reaction force in the specified direction DA. The direction of the reaction force absorbed by the rear plate 20 is opposite to the direction in which the screw 14 moves.

[0014] The fastening element 30 extends in the specified direction DA and is located at least between the front plate 18 and the rear plate 20. In the Fig. In the example shown, the fastening element 30 completely covers a space between the front plate 18 and the rear plate 20 in the specified direction DA. However, the fastening element 30 may not necessarily completely cover the space between the front plate 18 and the rear plate 20.

[0015] In Fig. 1 The fastening element 30 is provided such that it covers the upper surfaces of the front plate 18 and the rear plate 20, but can also be provided such that it covers side surfaces of the front plate 18 and the rear plate 20.

[0016] In the present embodiment, a cover (not shown) of the injection device 10 can be attached to the fastening element 30. The fastening element 30 itself can, however, be the cover of the injection device 10. The fastening element 30 can also be used for purposes other than attaching the cover. For example, the fastening element 30 can be used for wiring (cable connections). Components (parts) other than the cover can be attached to the fastening element 30.

[0017] Only one plate of the front plate 18 and the rear plate 20 is attached to the base 16, so that it is not movable relative to the base 16, at least in the specified direction DA. In this embodiment, only the front plate 18 is attached to the base 16, for example by screwing or welding. Therefore, the front plate 18 cannot move relative to the base 16 in the specified direction DA.

[0018] For the sake of clarity, it shows Fig. 1. A support point F1, at which the front plate 18 is supported by the base 16. The front plate 18 is attached to the support point F1 on the base 16.

[0019] The other plate of the front plate 18 and the rear plate 20 is supported by the base 16, so that it is movable relative to the base 16 in the predetermined direction DA. In this embodiment, the rear plate 20 is not attached to the base 16.

[0020] The rear plate 20 can be supported at the base 16 by a sliding mechanism SR1. In this case, the rear plate 20 can move in the specified direction DA relative to the base 16 by means of the sliding mechanism SR1. For clarity, in Fig. 1 a support point R1 is shown, at which the rear plate 20 is supported by the base 16.

[0021] The sliding mechanism SR1 smooths the linear movement of the rear plate 20. The sliding mechanism SR1 consists, for example, of a guide rail, a roller, a bearing, or the like, arranged between the rear plate 20 and the base 16. A convex section formed on the rear plate 20 or the base 16 and a concave section formed on the other side thereof can be used as the sliding mechanism SR1. When the rear plate 20 is moved by the sliding mechanism SR1, friction and vibration due to the movement are minimal. This helps prevent damage to the rear plate 20 and similar issues.

[0022] The rear plate 20 can simply be placed on the base 16 without using the sliding mechanism SR1. It is sufficient that the rear plate 20 is movable relative to the base 16 in the specified direction DA without being attached to the base 16.

[0023] Only one plate of the front plate 18 and the rear plate 20 is attached to the fastening element 30, so that it is not movable in at least the specified direction DA relative to the fastening element 30. In this embodiment, only the front plate 18 is attached to the fastening element 30, for example by screwing or welding. Therefore, the front plate 18 cannot move relative to the fastening element 30 in the specified direction DA.

[0024] For the sake of clarity, it shows Fig. 1. A support point F2, at which the front plate 18 supports the fastening element 30. The front plate 18 is attached to the fastening element 30 at support point F2.

[0025] The respective other plates of the front plate 18 and the rear plate 20 support the fastening element 30 in such a way that the other plate is movable relative to the fastening element 30 in the predetermined direction DA. In the present embodiment, the rear plate 20 is not attached to the fastening element 30. The rear plate 20 can support the fastening element 30 via a sliding mechanism SR2. In this case, the rear plate 20 can move relative to the fastening element 30 in the predetermined direction DA by means of the sliding mechanism SR2. For clarity, in Fig. 1 a support point R2 is shown, at which the rear plate 20 supports the fastening element 30.

[0026] The sliding mechanism SR2 smooths the linear movement of the rear plate 20. The sliding mechanism SR2 is formed, for example, by a guide rail, a roller, a bearing, or the like, arranged between the rear plate 20 and the fastener 30. A convex section formed on the rear plate 20 or the fastener 30, and a concave section formed on the other, can be used as the sliding mechanism SR2. When the rear plate 20 is moved by the sliding mechanism SR2, friction and vibration due to the movement are minimal. This prevents deformation or damage to the fastener 30 and the like.

[0027] The fastening element 30 can simply be placed on the rear plate 20 without using the sliding mechanism SR2. It is sufficient that the rear plate 20 is movable relative to the fastening element 30 in the specified direction DA without being attached to the fastening element 30.

[0028] As described above, the rear plate 20 can absorb a reaction force in the specified direction DA. In this embodiment, the rear plate 20 can move away from the front plate 18 along the specified direction DA relative to the base 16 and the fastening element 30, according to the reaction force absorbed by the rear plate 20. That is, the rear plate 20 can move without being restricted by the base 16 or the fastening element 30. Therefore, the front plate 18 and the rear plate 20 can be held parallel to each other.

[0029] The above embodiment can be modified as follows. In the following modifications, the description that overlaps with the embodiment is omitted. In the drawings used to illustrate the following modifications, the same components as in the embodiment are labeled with the same reference numerals. (Variation 1)

[0030] In the embodiment described above, the front plate 18 and the rear plate 20 are formed separately and connected to each other by the plurality of tie rods 22. However, the front plate 18 and the rear plate 20 can also be formed in one piece without using the plurality of tie rods 22. Fig. Figure 2 is a schematic representation of an injection device 10 according to a first modification. In the first modification, the front plate 18 and the rear plate 20 are formed in one piece.

[0031] The sliding plate 24 is supported from below by the base 16 between the front plate 18 and the rear plate 20. As shown in Fig. As shown in Figure 2, the sliding plate 24 can be supported on the base 16 by a sliding mechanism SP. The sliding plate 24 is guided by the base 16 and can move linearly in a predefined direction DA. The sliding plate 24 can also be simply placed on the base 16 without using the sliding mechanism SP.

[0032] The sliding mechanism SP is formed, for example, from a guide rail, a roller, a bearing, or the like, which is provided between the push plate 24 and the base 16. A convex section formed on one of the push plate 24 and the base 16, and a concave section formed on the other, can be used as the sliding mechanism SP.

[0033] In the first modification as well, the rear plate 20 can move relative to the base 16 and the fastening element 30 along the specified direction DA in a direction away from the front plate 18 according to the reaction force absorbed by the rear plate 20. Therefore, the front plate 18 and the rear plate 20 can be held parallel to each other. (Variation 2)

[0034] Fig. Figure 3 is a schematic view of an injection device 10 according to a second modification. In the second modification, only the rear plate 20 is attached to the base 16, for example by screwing or welding. The rear plate 20 is attached to a Fig. 3. Support point R1 is attached to the base 16.

[0035] In the second modification, the front plate 18 is not attached to the base 16. The front plate 18 can be supported by the base 16 via a sliding mechanism SF1. In this case, the front plate 18 is attached to a Fig. The support point F1 shown in Figure 3 is located on the base 16. The front plate 18 can be easily placed on the base 16 without the sliding mechanism SF1.

[0036] In the second variation, only the rear plate 20 is attached to the fastening element 30, for example by screwing or welding. The rear plate 20 is attached to the fastening element 30 at a point in Fig. 3 shown support point R2 is attached.

[0037] The front plate 18 is not connected to the fastening element 30. The front plate 18 can support the fastening element 30 via a sliding mechanism SF2. In this case, the front plate 18 supports the fastening element 30 at a point in Fig. 3 support point F2 shown. The fastening element 30 can simply be placed on the front plate 18 without using the sliding mechanism SF2.

[0038] As described above, the rear plate 20 can absorb a reaction force in the specified direction DA. In the second modification, the front plate 18 can move relative to the base 16 and the fastening element 30 in a direction away from the rear plate 20 along the specified direction DA, corresponding to the reaction force absorbed by the rear plate 20. That is, the front plate 18 can move without being restricted by the base 16 or the fastening element 30. Therefore, the front plate 18 and the rear plate 20 can be held parallel to each other. (Variation 3)

[0039] Fig. Figure 4 shows a schematic view of an injection device 10 according to a third modification. In the third modification, only the front plate 18 is attached to the base 16, and only the rear plate 20 is attached to the fastening element 30. The front plate 18 is not attached to the fastening element 30, and the rear plate 20 is not attached to the base 16.

[0040] In the third modification, the rear plate 20, together with the fastening element 30, can move relative to the base 16 along the specified direction DA in a direction away from the front plate 18, corresponding to the reaction force absorbed by the rear plate 20. That is, the rear plate 20 can move together with the fastening element 30 without being restricted by the base 16. Therefore, the front plate 18 and the rear plate 20 can be held parallel to each other.

[0041] Alternatively, only the rear plate 20 can be attached to the base 16, and only the front plate 18 can be attached to the mounting element 30. In this case, the rear plate 20 is not attached to the mounting element 30 and the front plate 18 is not attached to the base 16.

[0042] The front plate 18, together with the fastening element 30, can move relative to the base 16 along the specified direction DA in a direction away from the rear plate 20, corresponding to the reaction force absorbed by the rear plate 20. That is, the front plate 18, together with the fastening element 30, can move without being restricted by the base 16. Therefore, the front plate 18 and the rear plate 20 can also be kept parallel to each other in this case.

[0043] However, components such as the cover attached to the fastener 30 are displaceable relative to the fastener 30 in accordance with a movement of the fastener 30 relative to the base 16. Since the components, such as the cover, are displaceable with respect to the fastener 30, deformation of the components, such as the cover, due to the movement of the fastener 30, can be prevented. (Variation 4)

[0044] Fig. Figure 5 shows a schematic view of an injection device 10 according to a fourth modification. In the fourth modification, only the front plate 18 is attached to the base 16 and the fastening element 30. The rear plate 20 may not be attached to the base 16 and may be spaced apart from the fastening element 30. In the Fig. In the example shown in Figure 5, the rear plate 20 and the fastening element 30 are spaced apart from each other by a gap GA.

[0045] In the fourth modification, the rear plate 20 can move away from the front plate 18 in a direction DA specified by the reaction force absorbed by the rear plate 20. That is, the rear plate 20 can move without being restricted by the base 16 or the fastening element 30. Therefore, the front plate 18 and the rear plate 20 can be held parallel to each other. (Variation 5)

[0046] Fig. Figure 6 shows a schematic view of an injection device 10 according to a fifth modification. In the fifth modification, only the rear plate 20 is attached to the base 16 and also to the mounting element 30. The front plate 18 is not attached to the base 16 and is spaced apart from the mounting element 30. In the Fig. In the example shown in Figure 6, the front plate 18 and the fastening element 30 are separated from each other by a gap GB.

[0047] In the fifth modification, the front plate 18 can move away from the rear plate 20 in a direction DA corresponding to the reaction force absorbed by the rear plate 20. That is, the front plate 18 can move without being restricted by the base 16 or the fastening element 30. Therefore, the front plate 18 and the rear plate 20 can be held parallel to each other. (Variation 6)

[0048] Fig. Figure 7 shows a schematic view of an injection device 10 according to a sixth modification. In the sixth modification, only the front plate 18 is attached to the mounting element 30, and only the rear plate 20 is attached to the base 16. The front plate 18 is not attached to the base 16, and the rear plate 20 is spaced apart from the mounting element 30. In the Fig. In the example shown, the rear plate 20 and the fastening element 30 are spaced apart from each other by a gap GA.

[0049] In the sixth modification, the front plate 18, together with the fastening element 30, can move relative to the base 16 along the specified direction DA in a direction away from the rear plate 20, corresponding to the reaction force absorbed by the rear plate 20. That is, the front plate 18 can move together with the fastening element 30 without being restricted by the base 16. Therefore, the front plate 18 and the rear plate 20 can be held parallel to each other. However, components such as the cover attached to the fastening element 30 are displaceable relative to the movable fastening element 30.

[0050] Alternatively, only the front plate 18 can be attached to the base 16, and only the rear plate 20 can be attached to the mounting element 30. In this case, the front plate 18 is spaced away from the mounting element 30, and the rear plate 20 is not attached to the base 16.

[0051] The rear plate 20, together with the fastening element 30, can move relative to the base 16 along the specified direction DA in a direction away from the front plate 18, corresponding to the reaction force absorbed by the rear plate 20. That is, the rear plate 20 can move together with the fastening element 30 without being restricted by the base 16. Therefore, the front plate 18 and the rear plate 20 can also be kept parallel to each other in this case. (Variation 7)

[0052] The above-mentioned variations 1 to 6 can be combined in any way, as long as no technical contradiction occurs.

[0053] In all the above-mentioned embodiments and modifications, the accuracy of the injection molding is improved because the front plate 18 and the rear plate 20 are held parallel to each other during injection molding. Furthermore, this prevents the fastening element 30 and the like from being deformed or damaged.

[0054] The following supplementary remarks are disclosed with regard to the above embodiment and modifications. (Supplementary Note 1)

[0055] The present disclosure is characterized by the injection device (10) which injects the molding material, which is supplied to the interior of the cylinder (12), into the mold, the injection device comprising: the screw (14) which is inserted into the cylinder and is configured to be movable in the predetermined direction (DA); the front plate (18) to which the cylinder is attached; the push plate (24) which is configured to push the screw in the predetermined direction towards the apex of the interior of the cylinder into which the molding material has been supplied; the rear plate (20) which absorbs the reaction force in the predetermined direction by the push plate pushing the screw; the base (16) which supports the front plate and the rear plate from below;and the fastening element (30) extending in the specified direction and arranged at least between the front plate and the rear plate, wherein the specified direction is the direction of the axis (AX) of the worm, only one plate of the front plate and the rear plate is attached to the base in such a way that it is not movable relative to the base at least in the specified direction, and only one plate of the front plate and the rear plate is attached to the fastening element in such a way that it is not movable relative to the fastening element in at least the specified direction. (Supplementary Note 2)

[0056] The injection device according to supplementary note 1 may further comprise a plurality of tie rods (22) connecting the front plate and the rear plate. (Supplementary Note 3)

[0057] In the injection device according to supplementary note 1, the front plate and the rear plate can be formed in one piece. (Supplementary Note 4)

[0058] In the injection device according to one of the supplementary notes 1 to 3, the other plate of the front plate or the rear plate, which differs from the one plate attached to the fastening element, can support the fastening element in such a way that the other plate is movable relative to the fastening element in the specified direction. (Supplementary Note 5)

[0059] In the injection device according to supplementary note 4, the other plate can support the fastening element via the sliding mechanism (SR2, SF2). (Supplementary Note 6)

[0060] In the injection device according to one of the supplementary notes 1 to 3, the other plate of the front plate and the rear plate, which differs from the one plate that is attached to the fastening element, may be spaced apart from the fastening element.

[0061] Although the present disclosure has been described in detail, it is not necessarily limited to the individual embodiments and modifications. These embodiments may be subject to various additions, substitutions, modifications, partial omissions, etc., without deviating from the essence and core of the present disclosure or the spirit of the disclosure as it arises from the claims and their correspondences. Furthermore, these embodiments may also be combined with one another. For example, in the embodiments described above, the sequence of the individual operations and processes is merely illustrated by way of example, and the present invention is not necessarily limited to these examples. The same applies if numerical values ​​or mathematical expressions are used in the description of the embodiments mentioned above. Reference symbol list 10 Injection device 12 cylinders 14 snail 16 base 18 front plate 20 rear plate 22 Pull rod 24 drawer plate 26 Ball screw drive 28 Mother 30 Fastening element QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2020-157682 A

[0002]

Claims

[1] Injection device for injecting a molding material supplied to the interior of a cylinder into a mold, the injection device comprising: a screw that is inserted into the cylinder and is designed to be movable in a predetermined direction; a front plate to which the cylinder is attached; a pusher plate designed to push the screw in the specified direction towards a tip of the interior of the cylinder into which the molding material has been fed; a rear plate designed to absorb a reaction force in the specified direction by the push plate pressing the screw; a base that supports the front and rear plates from below; and a fastening element that extends in the specified direction and is located at least between the front plate and the rear plate, where the specified direction is a direction of an axis of the worm, only one plate of the front plate and the rear plate is attached to the base, so that it is not movable in at least the specified direction relative to the base, and only one plate of the front plate and the rear plate is attached to the fastening element, so that it is not movable in at least the specified direction relative to the fastening element. [2] Injection device according to claim 1, further comprising a plurality of tie rods connecting the front plate and the rear plate. [3] Injection device according to claim 1, wherein the front plate and the rear plate are formed in one piece. [4] Injection device according to one of claims 1 to 3, wherein another plate of the front plate and the rear plate, which differs from the one plate which is attached to the fastening element, supports the fastening element in such a way that the other plate is movable relative to the fastening element in the predetermined direction. [5] Injection device according to claim 4, wherein the other plate supports the fastening element via a sliding mechanism. [6] Injection device according to one of claims 1 to 3, wherein another plate of the front plate and the rear plate, which differs from the one plate which is attached to the fastening element, is spaced apart from the fastening element.

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