CN103182484B - Automatic sand adding mechanism for lift type sand shooting head - Google Patents
Automatic sand adding mechanism for lift type sand shooting head Download PDFInfo
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- CN103182484B CN103182484B CN201310122800.6A CN201310122800A CN103182484B CN 103182484 B CN103182484 B CN 103182484B CN 201310122800 A CN201310122800 A CN 201310122800A CN 103182484 B CN103182484 B CN 103182484B
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- 239000004576 sand Substances 0.000 title claims abstract description 177
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005266 casting Methods 0.000 abstract description 2
- 238000002347 injection Methods 0.000 description 13
- 239000007924 injection Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 239000003110 molding sand Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
本发明涉及一种升降式射砂头自动加砂机构，它属于铁型覆砂铸造领域。本发明包括支撑梁、升降式射砂头、砂斗和升降驱动，升降式射砂头位于支撑梁的下方，该升降式射砂头通过支撑梁上的升降驱动实现运动，升降式射砂头上设置有下阀座和下阀芯，砂斗设置在升降式射砂头的上方，砂斗与支撑梁连接，砂斗还与上阀芯、上阀座和导向座连接。本发明采用升降式射砂头自动加砂机构，降低了企业的成本，提高了生产效率。
The invention relates to an automatic sand-adding mechanism for a lift-type sand-shooting head, which belongs to the field of iron mold sand-covered casting. The invention includes a support beam, a lifting sand shooting head, a sand bucket and a lifting drive. The lifting sand shooting head is located under the support beam. The lifting sand shooting head moves through the lifting drive on the support beam. A lower valve seat and a lower valve core are arranged on the top, and the sand bucket is arranged on the top of the lifting sand shooting head, and the sand bucket is connected with the support beam, and the sand bucket is also connected with the upper valve core, the upper valve seat and the guide seat. The invention adopts the automatic sand adding mechanism of the lifting sand shooting head, which reduces the cost of the enterprise and improves the production efficiency.
Description
技术领域 technical field
本发明涉及一种机构，尤其是一种升降式射砂头自动加砂机构，它属于铁型覆砂铸造领域。 The invention relates to a mechanism, in particular to an automatic sand-adding mechanism of a lift-type sand-shooting head, which belongs to the field of sand-covered iron casting.
背景技术 Background technique
现有覆砂造型机的射砂头为固定式结构或水平移动结构，没有竖直方向上的位移，造型方式为：射砂头、加热至一定温度的铁型和模具分别位于上中下三个位置，由处于最下方的举升机构依次将模具、铁型举起，并压紧射砂头下表面，实现三者的紧密贴合后，以一定压力的压缩空气，通过射砂头将覆膜砂吹入模具与铁型的间隙内，迅速成型硬化。 The sand-injecting head of the existing sand-covered molding machine is a fixed structure or a horizontally movable structure, without vertical displacement. At the first position, the mold and the iron mold are lifted up by the lifting mechanism at the bottom, and the lower surface of the sanding head is pressed tightly. The coated sand is blown into the gap between the mold and the iron mold, forming and hardening rapidly.
由于每次射砂完成，都要为射砂头加砂，以免因射砂头内砂量不足，而导致下一次射砂造型失败，固定式射砂头一般采用浮力球作为单向阀，来控制加砂与否，水平移动式射砂头一般采用闸板推拉机构实现加砂口地开启与闭合，这两种加砂机构均为固定式结构或水平移动结构，且随着现代工艺生产需要，人工加砂方式已经不能满足人们的需求。 Since every time the sand shooting is completed, sand must be added to the sand shooting head to avoid the failure of the next sand shooting molding due to insufficient sand in the sand shooting head. The fixed sand shooting head generally uses a buoyancy ball as a one-way valve to To control whether to add sand or not, the horizontally movable sand injection head generally uses a ram push-pull mechanism to realize the opening and closing of the sand inlet. , the artificial sanding method can no longer meet people's needs.
中国专利号200820085553.1公开了一种名称为“一种覆砂造型机的加砂机构” 的实用新型专利，它包括砂斗和射砂筒，砂斗在出砂口处通过一个能根据气压差打开的单向阀与射砂筒连接，单向阀包括连接座和浮动球，该专利射砂筒是固定式的，故其不能进行升降，还是存在上述缺陷。 China Patent No. 200820085553.1 discloses a utility model patent titled "A Sand Adding Mechanism for a Sand Covered Molding Machine", which includes a sand bucket and a sand shooting cylinder. The one-way valve of the patent is connected with the sand shooting cylinder, and the one-way valve includes a connecting seat and a floating ball. The sand shooting cylinder of this patent is fixed, so it cannot be lifted, and still has the above-mentioned defects.
发明内容 Contents of the invention
本发明所要解决的技术问题是，克服现有技术存在的缺陷，而提供一种结构设计合理，通过采用升降式射砂头自动加砂机构，降低了企业的成本，提高了生产效率。 The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a reasonable structural design, which reduces the cost of the enterprise and improves the production efficiency by adopting the automatic sand adding mechanism of the lifting sand shooting head.
本发明解决上述问题所采用的技术方案是：一种升降式射砂头自动加砂机构，包括支撑梁、螺杆和锁紧螺母,其特征在于：还包括升降式射砂头、砂斗和升降驱动，所述的升降式射砂头位于支撑梁的下方，该升降式射砂头通过支撑梁上的升降驱动实现运动，升降式射砂头上设置有下阀座和下阀芯，砂斗设置在升降式射砂头的上方，砂斗与所述的支撑梁连接，砂斗还与上阀芯、上阀座和导向座连接；升降式射砂头上升运动，在非射砂状态下完成下阀芯和上阀芯的顺序开启，型砂靠自重由砂斗流入升降式射砂头内，升降式射砂头下降运动，完成上阀芯和下阀芯的顺序闭合，实现停止加砂并可进一步完成射砂动作，支撑梁上固定有升降驱动，升降式射砂头通过升降驱动实现运动。 The technical solution adopted by the present invention to solve the above-mentioned problems is: an automatic sand feeding mechanism for a lift-type sand shooting head, including a support beam, a screw rod and a lock nut, and is characterized in that it also includes a lift-type sand shooting head, a sand bucket and a lift drive, the lift-type sand-shooting head is located below the support beam, and the lift-type sand-shooting head moves through the lifting drive on the support beam. The lift-type sand-shooting head is provided with a lower valve seat and a lower valve core, and the sand bucket Set above the lifting type sand shooting head, the sand bucket is connected with the support beam, and the sand bucket is also connected with the upper valve core, upper valve seat and guide seat; the lifting type sand shooting head moves upwards, in the non-sand shooting state Complete the sequential opening of the lower valve core and the upper valve core, the molding sand flows into the lift-type sand injection head from the sand bucket by its own weight, and the lift-type sand injection head moves down, completes the sequential closing of the upper valve core and the lower valve core, and realizes the stop of sand filling And the sand shooting action can be further completed. The lifting drive is fixed on the support beam, and the lifting type sand shooting head can move through the lifting drive.
本发明所述的下阀座与下阀芯之间设有下复位弹簧，上阀芯与导向座之间设有上复位弹簧，该上复位弹簧的压缩张力大于所述下复位弹簧的压缩张力；上复位弹簧和下复位弹簧便于实现不同的工作状态，当上复位弹簧的压缩张力大于下复位弹簧的压缩张力，下阀芯被压缩，进砂口开启，若上复位弹簧的压缩张力不大于下复位弹簧张力，则上阀芯先开启，就会产生漏砂。 According to the present invention, a lower return spring is provided between the lower valve seat and the lower valve core, and an upper return spring is provided between the upper valve core and the guide seat. The compression tension of the upper return spring is greater than that of the lower return spring. ;The upper return spring and the lower return spring are convenient to realize different working states. When the compression tension of the upper return spring is greater than the compression tension of the lower return spring, the lower valve core is compressed and the sand inlet is opened. If the compression tension of the upper return spring is not greater than If the tension of the lower return spring is lower, the upper spool is opened first, and sand leakage will occur.
本发明所述的下阀芯与上阀芯在同一轴线上；便于升降式射砂头的下降运动，完成下阀芯与上阀芯的顺序闭合，实现停止加砂并可进一步完成射砂动作。 The lower valve core and the upper valve core of the present invention are on the same axis; it is convenient for the descending movement of the lift-type sand shooting head, and the sequential closing of the lower valve core and the upper valve core is completed, and the sand filling can be stopped and the sand shooting action can be further completed .
本发明所述的下阀芯与下阀座活动连接；便于下阀芯在下阀座上实现上下移动，更好地实现自动加砂过程。 The lower valve core of the present invention is movably connected with the lower valve seat; it is convenient for the lower valve core to move up and down on the lower valve seat, so as to better realize the automatic sand adding process.
本发明所述的上阀芯与导向座活动连接；便于上阀芯在导向座上实现上下移动，更好地实现自动加砂过程。 The upper valve core of the present invention is movably connected with the guide seat; it is convenient for the upper valve core to move up and down on the guide seat, so as to better realize the automatic sand adding process.
本发明所述的下阀芯上设有螺杆和锁紧螺母；螺杆未触碰上阀芯头部，进砂口闭合，螺杆头部与上阀芯头部抵住，当上复位弹簧的压缩张力大于下复位弹簧的压缩张力，下阀芯被压缩，进砂口开启，锁紧螺母起固定作用。 The lower spool of the present invention is provided with a screw and a lock nut; the screw does not touch the head of the upper spool, the sand inlet is closed, and the head of the screw is against the head of the upper spool, when the compression of the upper return spring The tension is greater than the compression tension of the lower return spring, the lower valve core is compressed, the sand inlet is opened, and the lock nut plays a fixing role.
本发明所述的砂斗上设有第一出砂口，该第一出砂口为圆形结构，导向座上设有第二出砂口，下阀座设有第三出砂口，第二出砂口和第三出砂口均呈辐射状结构；圆形结构和辐射状结构是为了使砂斗内的型砂更顺畅流入升降式射砂头内。 The sand bucket of the present invention is provided with a first sand outlet, the first sand outlet is a circular structure, the guide seat is provided with a second sand outlet, the lower valve seat is provided with a third sand outlet, and the first sand outlet is provided with a circular structure. Both the second sand outlet and the third sand outlet have a radial structure; the circular structure and the radial structure are to make the molding sand in the sand bucket flow into the lifting sand shooting head more smoothly.
本发明所述的升降式射砂头上设有进砂口，该进砂口呈凹锥台形；进砂口的凹进锥台形结构能够保证整个加砂过程不会产生型砂外溢，通过对调整螺杆旋进旋出来调整下阀芯长度，以控制上阀芯的压缩深度，从而调节加砂流量。 The lift-type sand shooting head of the present invention is provided with a sand inlet, which is in the shape of a concave truncated cone; the concave truncated cone structure of the sand inlet can ensure that the molding sand will not overflow during the entire sand adding process. The screw is screwed in and out to adjust the length of the lower spool to control the compression depth of the upper spool, thereby adjusting the flow of sand.
本发明所述的上阀芯与下阀芯均呈锥台型，下阀芯设有有螺纹孔；螺纹孔用于安装螺杆，更好地进行下一步射砂动作。 Both the upper spool and the lower spool of the present invention are in the shape of a truncated cone, and the lower spool is provided with a threaded hole; the threaded hole is used for installing a screw rod, so that the next sand-shooting action can be performed better.
本发明所述的上阀座上设有第四出砂口，该第四出砂口最小处直径小于等于所述的升降式射砂头上的进砂口最小处直径；以便于型砂从第四出砂口顺畅流入进砂口。 The upper valve seat of the present invention is provided with a fourth sand outlet, and the minimum diameter of the fourth sand outlet is less than or equal to the minimum diameter of the sand inlet on the lift-type sand shooting head; The four sand outlets flow smoothly into the sand inlet.
本发明与现有技术相比具有以下优点和效果：1、结构设计合理，通过采用升降式射砂头自动加砂机构，降低了企业的成本，提高了生产效率。 Compared with the prior art, the present invention has the following advantages and effects: 1. The structural design is reasonable, and the cost of the enterprise is reduced and the production efficiency is improved by adopting the automatic sand adding mechanism of the lifting sand shooting head.
2、升降式射砂头的上升运动，在非射砂状态下完成下阀芯和上阀芯地顺序开启，型砂靠自重由砂斗流入射砂头内。 2. The ascending movement of the lift-type sand injection head completes the sequential opening of the lower valve core and the upper valve core in the non-sand injection state, and the molding sand flows into the sand injection head from the sand bucket by its own weight.
3、升降式射砂头的下降运动，完成上阀芯和下阀芯地顺序闭合，实现停止加砂并可进一步完成射砂动作。 3. The descending movement of the lifting type sand shooting head completes the sequential closing of the upper valve core and the lower valve core, realizes the stop of sand adding and further completes the sand shooting action.
4、上阀芯和下阀芯的顺序动作和升降式射砂头上部进砂口外表面凹进锥台形结构能够保证整个加砂过程不会产生型砂外溢。 4. The sequential action of the upper valve core and the lower valve core and the recessed frustum-shaped structure of the outer surface of the upper sand inlet of the lift-type sand injection head can ensure that the entire sand filling process will not cause sand overflow.
5、通过螺杆来调节下阀芯长度，以控制上阀芯的压缩深度，从而调节加砂流量。 5. The length of the lower spool is adjusted by the screw to control the compression depth of the upper spool, thereby adjusting the flow of sand.
附图说明 Description of drawings
图1为本发明整体结构示意图。 Figure 1 is a schematic diagram of the overall structure of the present invention.
图2为本发明工作状态结构示意图一。 Fig. 2 is a first structural diagram of the working state of the present invention.
图3为本发明工作状态结构示意图二。 Fig. 3 is a second structural diagram of the working state of the present invention.
图4为本发明工作状态结构示意图三。 Fig. 4 is a schematic diagram III of the working state structure of the present invention.
图中：升降式射砂头1，下阀座2，下复位弹簧3，下阀芯4，锁紧螺母5，螺杆6，上阀芯7，上复位弹簧8，上阀座9，导向座10，砂斗11，升降驱动12，支撑梁13，第一出砂口Ⅰ，第二出砂口Ⅱ，第三出砂口Ⅲ，第四出砂口Ⅳ，进砂口Ⅴ。 In the figure: Lifting sand injection head 1, lower valve seat 2, lower return spring 3, lower valve core 4, lock nut 5, screw rod 6, upper valve core 7, upper return spring 8, upper valve seat 9, guide seat 10. Sand bucket 11, lifting drive 12, support beam 13, first sand outlet I, second sand outlet II, third sand outlet III, fourth sand outlet IV, and sand inlet V.
具体实施方式 Detailed ways
下面结合附图和实施例对本发明作进一步描述。 The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
参见图1-图4，本实施例包括升降式射砂头1、升降驱动12、砂斗11和支撑梁13，升降式射砂头1通过升降驱动12实现上下运动，升降式射砂头1位于支撑梁13的下方，升降驱动12固定在支撑梁13上，砂斗11安装在升降式射砂头1的上方，砂斗11与支撑梁13连接。 Referring to Fig. 1-Fig. 4, this embodiment includes a lifting type sand shooting head 1, a lifting drive 12, a sand bucket 11 and a support beam 13. The lifting type sand shooting head 1 can move up and down through the lifting drive 12. Located below the supporting beam 13, the lifting drive 12 is fixed on the supporting beam 13, the sand bucket 11 is installed above the lifting type sand shooting head 1, and the sand bucket 11 is connected with the supporting beam 13.
升降式射砂头1上连接有下阀座2和下阀芯4，升降式射砂头1上安装有进砂口Ⅴ，该进砂口Ⅴ呈凹锥台形，下阀座2和下阀芯4之间安装有下复位弹簧3，下阀芯4上开有螺纹孔，螺杆6通过锁紧螺母5装入螺纹孔，下阀芯4可以在下阀座2上实现上下移动，下阀座2连接有第三出砂口Ⅲ，第三出砂口Ⅲ呈辐射状结构，下阀芯4呈锥台型。 The lower valve seat 2 and the lower valve core 4 are connected to the lift-type sand injection head 1, and the sand inlet Ⅴ is installed on the lift-type sand injection head 1. The sand inlet Ⅴ is in the shape of a concave cone. A lower return spring 3 is installed between the cores 4, and a threaded hole is opened on the lower valve core 4, and the screw rod 6 is loaded into the threaded hole through the lock nut 5, and the lower valve core 4 can move up and down on the lower valve seat 2, and the lower valve seat 2 is connected with the third sand outlet III, the third sand outlet III has a radial structure, and the lower valve core 4 is in the shape of a cone.
砂斗11上连接有上阀芯7、上阀座9和导向座10，上阀芯7和导向座10之间安装有上复位弹簧8，上阀芯7可以在导向座10上实现上下移动，砂斗11上连接有第一出砂口Ⅰ，第一出砂口Ⅰ为圆形结构，上阀芯7呈锥台型，上阀座9上开有第四出砂口Ⅳ，该第四出砂口Ⅳ最小处直径小于等于所述的升降式射砂头1上的进砂口Ⅴ最小处直径，上阀芯7与下阀芯4在空间位置上是竖直同轴的，导向座10上连接有第二出砂口Ⅱ，第二出砂口Ⅱ呈辐射状结构，上复位弹簧8的压缩张力大于下复位弹簧3的压缩张力。 The sand bucket 11 is connected with an upper valve core 7, an upper valve seat 9 and a guide seat 10, and an upper return spring 8 is installed between the upper valve core 7 and the guide seat 10, and the upper valve core 7 can move up and down on the guide seat 10 , the sand bucket 11 is connected with the first sand outlet I, the first sand outlet I is a circular structure, the upper valve core 7 is conical, and the upper valve seat 9 is opened with the fourth sand outlet IV. The minimum diameter of the four sand outlets IV is less than or equal to the minimum diameter of the sand inlet V on the lift-type sand shooting head 1, the upper valve core 7 and the lower valve core 4 are vertically coaxial in space, and guide The seat 10 is connected with the second sand outlet II, the second sand outlet II has a radial structure, and the compression tension of the upper return spring 8 is greater than that of the lower return spring 3 .
本实施优选的，砂斗11底部开有第一出砂口Ⅰ，所述第一出砂口Ⅰ为圆形结构，导向座10开有第二出砂口Ⅱ，下阀座2开有第三出砂口Ⅲ，第二出砂口Ⅱ和第三出砂口Ⅲ均呈辐射状结构。 Preferably in this implementation, there is a first sand outlet I at the bottom of the sand bucket 11, the first sand outlet I is a circular structure, the guide seat 10 is opened with a second sand outlet II, and the lower valve seat 2 is opened with a second sand outlet. The third sand outlet III, the second sand outlet II and the third sand outlet III all have a radial structure.
本实施优选的，上阀芯7头部呈锥台型，下阀芯4头部呈锥台型并开有螺纹孔。 Preferably in this implementation, the head of the upper spool 7 is in the shape of a truncated cone, and the head of the lower spool 4 is in the shape of a truncated cone and has a threaded hole.
本实施优选的，升降式射砂头1上部进砂口Ⅴ外表面呈凹锥台形。 Preferably in this implementation, the outer surface of the sand inlet V on the upper part of the lift-type sand shooting head 1 is in the shape of a concave cone.
本实施优选的，上阀座9上的第四出砂口Ⅳ最小处直径小于等于升降式射砂头1上部进砂口Ⅴ最小处直径。 Preferably in this implementation, the minimum diameter of the fourth sand outlet IV on the upper valve seat 9 is less than or equal to the minimum diameter of the sand inlet V on the upper part of the lift-type sand shooting head 1 .
参见图2-图4，升降式射砂头1依次上升的工作状态，使用时，升降式射砂头1由安装在支撑梁13上的升降驱动12带动，实现升降式射砂头1的升降运动，初始状态为：升降式射砂头1完成一轮射砂过程，准备提升至高位加砂，此时，下阀芯4头部的螺杆6未触碰到上阀芯7头部，进砂口Ⅴ处于闭合状态，第四出砂口Ⅳ也处于闭合状态；升降式射砂头1继续上升，此时，螺杆6头部与上阀芯7头部抵住，当上复位弹簧8的压缩张力大于下复位弹簧3的压缩张力，下阀芯4被压缩，进砂口Ⅴ开启，而上阀芯7在上复位弹簧8的张力作用下，第四出砂口Ⅳ仍为闭合；升降式射砂头1再进一步上升，此时，上复位弹簧8受到的压缩力大于自身张力时，第四出砂口Ⅳ开启，而下阀芯4被进一步被压缩，进砂口Ⅴ的尺寸也随之增大，型砂在重力作用下由第四出砂口Ⅳ顺利流入进砂口Ⅴ，为升降式射砂头1加砂，加砂完成后，升降式射砂头1下降，依上述原理，上阀芯7在上复位弹簧8的张力作用下，先将第四出砂口Ⅳ闭合，其后下阀芯4在下复位弹簧3的张力作用下，将进砂口Ⅴ闭合，升降式射砂头1完成整个自动加砂过程，准备下一轮射砂。 Referring to Fig. 2-Fig. 4, the lifting type sanding head 1 is in the working state of rising sequentially. When in use, the lifting type sanding head 1 is driven by the lifting drive 12 installed on the support beam 13 to realize the lifting of the lifting type sanding head 1. Movement, the initial state is: the lifting sand shooting head 1 completes a round of sand shooting process, and is ready to be lifted to a high position to add sand. At this time, the screw 6 at the head of the lower valve core 4 does not touch the head of the upper valve core 7. The sand outlet V is in the closed state, and the fourth sand outlet IV is also in the closed state; the lift-type sand injection head 1 continues to rise, at this time, the head of the screw rod 6 is in contact with the head of the upper valve core 7, and when the upper return spring 8 The compression tension is greater than the compression tension of the lower return spring 3, the lower spool 4 is compressed, and the sand inlet Ⅴ is opened, while the upper spool 7 is under the tension of the upper return spring 8, and the fourth sand outlet Ⅳ is still closed; At this time, when the compression force received by the upper return spring 8 is greater than its own tension, the fourth sand outlet IV is opened, and the lower valve core 4 is further compressed, and the size of the sand inlet V is also reduced. As it increases, the molding sand flows from the fourth sand outlet IV smoothly into the sand inlet V under the action of gravity, and sand is added to the lift-type sand injection head 1. After sand filling is completed, the lift-type sand injection head 1 descends, according to the above principle , under the tension of the upper return spring 8, the upper spool 7 first closes the fourth sand outlet IV, and then the lower spool 4 closes the sand inlet V under the tension of the lower return spring 3. The sand head 1 completes the whole automatic sand adding process and prepares for the next round of sand shooting.
上阀芯7和下阀芯4的顺序动作和进砂口Ⅴ的凹锥台形结构能够保证整个加砂过程不会产生型砂外溢，通过螺杆6来调整下阀芯4长度，以控制上阀芯7的压缩深度，从而调节加砂流量大小。 The sequential action of the upper spool 7 and the lower spool 4 and the frustum-shaped structure of the sand inlet V can ensure that no molding sand overflows during the entire sand filling process. The length of the lower spool 4 is adjusted by the screw 6 to control the upper spool. 7 compression depth, so as to adjust the size of sand flow.
以上仅仅是本说明书中所描述的一个具体实施例，可以在此发明中增加装置，凡依本发明专利构思所述的构造、特征及材料所做的等效或简单变化，均包括于本发明专利的保护范围内。 The above is only a specific embodiment described in this specification, devices can be added in this invention, all equivalent or simple changes made according to the structure, features and materials described in the patent concept of the present invention are included in the present invention within the scope of patent protection.
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| JPS5832542A (en) * | 1981-08-21 | 1983-02-25 | Sintokogio Ltd | Supplying device for sand in blowing type mold forming device |
| JP4098766B2 (en) * | 2004-09-29 | 2008-06-11 | 株式会社アイメタルテクノロジー | Blow head device for foundry sand |
| CN201179551Y (en) * | 2008-04-24 | 2009-01-14 | 浙江省机电设计研究院有限公司 | A sand filling mechanism of a sand-covered molding machine |
| CN202252004U (en) * | 2011-09-30 | 2012-05-30 | 壮大材料科技(杭州)有限公司 | Two-way valve |
| CN203221186U (en) * | 2013-04-10 | 2013-10-02 | 浙江省机电设计研究院有限公司 | Automatic sand feeding mechanism for lift type sand shooting head |
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