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       QTJ4-30C固定式电动空心免烧两用砌块机，是我公司吸取以往中小型砌块成型机优点基础上多次改进的又一种半自动机型，该机在QTJ4-30B机型的基础上又一次改进使设备更加坚固，模具及压头定位更精准，采用底模定向垂直、定向震动和上模加压震动，且生产的砌块密实度均匀，强度高，改用电动放料，自动推拉上模自动落模并多处设置数码行程开关，大大提高了生产效率，（可设电脑PC装置，实现砌块自动化生产），屏弃汽泵汽缸等易损部件改用齿条推拉模具电动放料，增加设备耐用性。
 QTJ4-30C Fixed Pneumatic Duble Function Block Forming Machine for Hollow Block and Baking-Free Brick is one kind of semi-automatic mode, which is developped by our factory on the basis of absorbing the advantages of medium and small sized block forming machines in the past. For this machine, one modification is made on the basis of QTJ4-30B so that it is more firm in structure and more precise in positioning of mould and pressing die head. Also, for this machine, the directional and vertical vibrationg by bottom mould and pressing and vibrating by upper die are adopted. So, the blocks produced with this machine are even in density and high in strength. For its material distributing system, it is modified into the pneumatic. For its pneumatic Pushing-Pulling mould mounting system, many digital travel limit switches are set up. The productivity is largely increased. (For this model, PC device can be equipped for full automatic block production